JP2021185847A - Digging machine - Google Patents

Abstract

To inhibit crops remaining in a digging machine from falling onto a front side from a digging tool when the digging machine is raised from a working posture.SOLUTION: A digging machine is connected to a travelling vehicle so as to be lifted and lowered by a lifting and lowering link mechanism, and includes: a machine frame; a digging tool formed of plate materials attached to the front part of the machine frame with the plate surface directed in a vertical direction for digging crops when the machine frame moves forward together with the travelling vehicle; a conveyance body for conveying the crops dug by the digging tool to the rear upside; and a posture adjusting mechanism for automatically adjusting the posture of the digging machine when the lifting and lowering link mechanism is raised so that the digging machine takes a falling suppressing posture for inhibiting the crops remaining in the digging machine from falling onto the front side from the digging tool when the digging machine is raised from the working posture by the lifting and lowering link mechanism.SELECTED DRAWING: Figure 1

Description

The present invention relates to a digging machine.

Conventionally, the excavator disclosed in Patent Document 1 is known.
The digging machine disclosed in Patent Document 1 has a digging tool for digging crops and a carrier provided behind the digging tool. This digging machine is attached to a tractor, and by being towed by the tractor, the digging tool digs the crops and the digged crops are transported backward and upward by the carrier.

Japanese Unexamined Patent Publication No. 2005-73675

Conventionally, when the moat machine is lifted when turning on a headland or the like, the moat machine is in a forward-down lifting posture. For this reason, the crops remaining in the moat machine will fall forward from the moat tool. The fallen crops are trampled by the tractor and become a loss.
An object of the present invention is to prevent crops remaining in the excavator from falling forward from the excavator when the excavator is lifted from the working posture.

The digging machine according to one aspect of the present invention is a digging machine that is vertically connected to a traveling vehicle by an elevating link mechanism, and the plate surface faces the machine frame and the front portion of the machine frame in the vertical direction. A digging tool that is formed of the plate material attached so as to dig up the crop by moving the machine frame forward together with the traveling vehicle, and a carrier that transports the crop digged by the digging tool backward and upward. And, when the excavator is lifted from the working posture by the elevating link mechanism, the fall restraining posture is set so as to prevent the crops remaining in the excavator from falling forward from the excavator. It is provided with an attitude adjusting mechanism that automatically adjusts the attitude of the excavator when the elevating link mechanism is raised.

Further, the fall restraint posture is a posture in which the moat tool is substantially horizontal.
Further, the posture adjusting mechanism includes a mast to which the elevating link mechanism is connected, and the posture adjusting mechanism has a swing piece pivotally supported on the mast by a pivot shaft and an engaging pin provided on the mast. The swing piece has a top link connecting portion to which the top link of the elevating link mechanism is connected, and the engaging pin from one end when the swing piece swings around the pivot shaft. It has an engaging hole formed so as to move to the other end, and the engaging hole is engaged when the elevating link mechanism is raised from the state where the excavator is in the working posture. By moving the mating pin from one end to the other end of the engaging hole, the front part of the excavator is lifted, the excavator is tilted upward, and the elevating link mechanism is raised to excavate the excavator. The rear part of the machine is lifted more than the front part, and the excavator is formed to have a length that makes it substantially horizontal.

Further, the posture adjusting mechanism is detachably attached to the swing piece to regulate the swing of the swing piece when the elevating link mechanism is raised from the state where the excavator is in the working posture. Has a regulatory pin to do.
Further, in the fall restraint posture, a bank is formed by soil on the moat tool.

According to the above-mentioned excavator, the attitude of the excavator is automatically adjusted by the attitude adjustment mechanism when the elevating link mechanism is raised, so that the attitude when the excavator is lifted remains in the excavator. It is in a fall restraint posture that prevents the crop from falling forward from the moat. As a result, when the excavator is lifted, it is possible to prevent the crops remaining in the excavator from falling forward from the excavator.

It is a side view of a ground work machine. It is a perspective view of the machine frame. It is a side view of the excavator. It is a top view of the excavator. It is a side view of the front part of the excavator. It is a top view of the excavator. It is a perspective view of the excavator which shows the other form of the excavator. It is a top view of the front part of the excavator. It is a top view which shows the modification of the support structure of the 1st side plate and the 2nd side plate. It is a rear view of the ridge, the first side plate and the second side plate. It is a plan view of the middle part of the excavator. It is a side view which shows the leveling mechanism. It is a perspective view which looked at the rear part of the machine frame from above. It is a perspective view which looked at the rear part of the machine frame from below. It is a rear view which shows the dent formed on the upper surface of a ridge. It is a rear view which shows the other example of a dent. It is a side view which shows the other example of the mounting structure of the leveling mechanism. It is a side view which shows the state of the posture adjustment mechanism in the work posture of a digger. It is sectional drawing which shows the posture adjustment mechanism. It is a side view which shows the state of the attitude adjustment mechanism in the lifting attitude of an excavator. It is a side view of the excavator in the middle of lifting. It is a side view of the fall restraint posture of a digger. It is a side view which shows the state which the embankment is formed on the excavation tool in the fall restraint posture. It is a side view which shows the state which the swing of a swing piece is fixed.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings as appropriate.
FIG. 1 shows a schematic side view showing the overall configuration of the ground work machine 1. The ground work machine 1 has a tractor 2 exemplified as a traveling vehicle, and a digging machine 4 mounted behind the tractor 2 via an elevating link mechanism 3.
In the present embodiment, the direction indicated by the arrow A1 direction (forward direction of the tractor 2) is shown as the forward direction, the direction indicated by the arrow A2 (the backward direction of the tractor 2) is shown backward, and the direction indicated by the arrow A3 is shown as the front-back direction. do.

Further, the horizontal direction (horizontal direction), which is a direction orthogonal to the front-rear direction A3, will be described as the machine width direction K1 (see FIG. 4). The machine width direction K1 is the width direction of the excavator 4 (machine frame 17). The direction from the central portion in the width direction to the right portion or the left portion of the ground work machine 1 (digging machine 4) will be described as the outer side in the machine width direction (outer side in the machine width direction). That is, the outside in the machine width direction is a direction away from the center in the width direction of the ground work machine 1 (digging machine 4) in the machine width direction K1. The direction opposite to the outside in the machine width direction will be described as the inside in the machine width direction (inside in the machine width direction). That is, the inside in the machine width direction is a direction approaching the center in the width direction of the ground work machine 1 (digging machine 4) in the machine width direction K1.

As shown in FIG. 1, the tractor 2 has a vehicle body 9 movably supported by left and right front wheels (not shown) and left and right rear wheels 5. A hydraulic device 6 is mounted on the rear portion of the vehicle body 9. Lift arms 7 are provided on the left side surface and the right side surface of the hydraulic device 6. The lift arm 7 is rotatable around an axis extending in the machine width direction K1 and is driven by the hydraulic pressure of the hydraulic device 6 to swing upward. When the hydraulic pressure of the hydraulic device 6 is released, the lift arm 7 swings downward. A top link bracket 8 is provided on the back surface of the hydraulic device 6. On the back surface of the vehicle body 9, a PTO shaft 10 which is a power take-out shaft for extracting rotational power is provided.

As shown in FIG. 1, the elevating link mechanism 3 is composed of a three-point link mechanism in this embodiment. The three-point link mechanism 3 has one top link 11 and a pair of lower links 12 arranged side by side in the machine width direction K1 below the top link 11. The front portion of the top link 11 is rotatably connected (coaxially supported) to the top link bracket 8 around the axis extending in the machine width direction K1. The lower link 12 is rotatably connected (axially supported) around the axis extending in the machine width direction K1 to the side surface of the vehicle body 9 at the front portion. The lower link 12 has a middle portion connected to the rear portion of the lift arm 7 by a lift rod 13.

The rear portion of the top link 11 and the rear portion of the lower link 12 are rotatably connected to the excavator 4 around the axis extending in the machine width direction K1. Therefore, the excavator 4 is movably connected to the rear of the tractor 2 via the elevating link mechanism 3 and is elevated by the hydraulic device 6. Specifically, when the lift rod 13 swings upward, the top link 11 and the lower link 12 move upward to raise the excavator 4, and when the lift rod 13 swings downward, the top link 11 and the lower link 12 move downward. The excavator 4 moves down. The vertical stop position of the excavator 4 can be adjusted by the hydraulic device 6.

The digging machine 4 is a working machine (onion digger) for digging a crop 16 (for example, an onion) cultivated in a field 14 (ridge 15) and transporting the digged crop 16 backward and upward.
As shown in FIG. 1, the excavator 4 has a machine frame 17. As shown in FIG. 2, the machine frame 17 has a first side frame 18L and a second side frame 18R arranged at a distance from the first side frame 18L in the machine width direction K1. .. The first side frame 18L and the second side frame 18R are connected by a plurality of members. The first side frame 18L has a main frame 19L that is long in the front-rear direction and a front frame 20L that is fixed in an upward protrusion on the inward side in the machine width direction of the front portion of the main frame 19L. The second side frame 18R has a main frame 19R that is long in the front-rear direction and a front frame 20R that is fixed upwardly inward in the machine width direction at the front portion of the main frame 19R.

As shown in FIG. 2, a gauge ring 21L that rolls in the furrow groove on the left side of the ridge 15 is attached to the rear portion of the first side frame 18L. A gauge ring 21R that rolls in the furrow groove on the right side of the furrow 15 is attached to the rear portion of the second side frame 18R.
As shown in FIG. 3, the excavator 4 has a transmission case 22 arranged on the upper side of the machine frame 17. The transmission case 22 is arranged at the center of K1 in the machine width direction of the machine frame 17, and is attached to a case mounting base 23 provided between the front frame 20L and the front frame 20R. The transmission case 22 is provided with an input shaft 24 so as to project forward. The input shaft 24 is connected to the PTO shaft 10 of the tractor 2 via a joint shaft (universal joint). The power from the PTO shaft 10 is taken into the transmission case 22 via the input shaft 24, and is output from the output shaft 25 protruding laterally (left side) from the transmission case 22.

As shown in FIG. 3, a digging device 26 for digging the crop 16 while cutting the root 16a of the crop 16 (onion) cultivated in the ridge 15 is provided at the front portion of the machine frame 17. Behind the excavation device 26, a transport body 27 for transporting the crop 16 excavated by the excavation device 26 is provided. The excavation device 26 and the carrier 27 are provided between the first side frame 18L and the second side frame 18R. The carrier 27 is arranged in an inclined shape that shifts upward as it goes backward. The transport body 27 is driven by transmitting the power output from the output shaft 25 of the transmission case 22 via the transmission mechanism (belt winding transmission mechanism) 28, transports the crop 16 backward and upward, and transports the crop 16 rearward and upward. Is dropped onto the upper surface 15a of the ridge 15 at the rear end portion 27a. A ground leveling mechanism 29 is provided at the rear of the machine frame 17. The ground leveling mechanism 29 is provided between the first side frame 18L and the second side frame 18R and below the rear end 27a side of the carrier 27, and the upper surface 15a of the ridge 15 after being dug up by the excavation device 26 is provided. Level the ground. The crop 16 transported by the transport body 27 falls on the upper surface 15a of the ridge 15 leveled by the ground leveling mechanism 29. The crop 16 that has fallen on the upper surface 15a of the ridge 15 is picked up by a picker or the like that is separately operated.

Next, each part of the excavator 4 will be described in detail.
As shown in FIGS. 2 and 4, the excavation device 26 is provided between the front portions of the first side frame 18L and the second side frame 18R. As shown in FIGS. 5 and 6A, the digging device 26 has a digging tool 31 for digging the crop 16 cultivated in the ridge 15 and a mounting member 32 to which the digging tool 31 is attached. The excavator 31 is made of a plate material. The excavator 31 is arranged so that the plate surface faces in the vertical direction, and is attached to the front portion of the machine frame 17 via the attachment member 32. The machine frame 17 moves forward as the tractor 2 moves forward, and the digging tool 31 digs the crop 16 while cutting the root 16a of the crop 16 as the machine frame 17 moves forward.

As shown in FIG. 6A, the excavator 31 is formed in an inclined shape in which the leading edge portion 33 shifts rearward from both ends of the machine width direction K1 toward the center of the machine width direction K1. Specifically, the leading edge portion 33 is formed from a straight portion 33a formed so as to extend in the machine width direction K1 on both ends of the machine width direction K1 and a machine from an end portion on the inner side in the machine width direction of the straight portion 33a. It has an inclined inclined portion 33b that shifts backward toward the central portion in the width direction K1. The inclined portion 33b corresponds to the crop 16, and the root 16a of the crop 16 is cut by the inclined portion 33b. The straight portion 33a may not be formed, and the leading edge portion 33 is inclined from one end and the other end of the digging tool 31 in the machine width direction toward the center of the machine width direction K1. May be good. Further, a hole penetrating in the vertical direction may be formed in the digging tool 31, and a part of the soil dug up by the digging tool 31 may be dropped and discharged from this hole. Therefore, this hole is formed to a size that does not allow the crop 16 to fall. Further, the number of holes may be one or a plurality.

By the way, if the leading edge portion 33 of the excavator 31 has a straight shape extending in the machine width direction K1 over the entire area of the machine width direction K1, the onion root 16a seems to be pushed out rather than cut. It becomes a state, and an unnecessarily long root 16a may remain. In the present embodiment, since the leading edge portion 33 of the excavator 31 is inclined, when the excavator 31 moves forward, the inclined portion 33b hits the root 16a of the crop 16 so as to slide, so that the root 16a Can be cut well.

The trailing edge portion 34 of the excavator 31 is formed in a straight shape extending in the machine width direction K1. Therefore, the excavator 31 is formed so that the plate width W1, which is the width in the front-rear direction A3, becomes wider from the central portion of the machine width direction K1 toward the outside of the machine width direction K1. That is, the excavator 31 has a narrow plate width at the center of K1 in the machine width direction and a wide plate width at both sides of K1 in the machine width direction. Therefore, soil tends to stay on both sides of the digging tool 31, and the soil slightly stays on both sides of the digging tool 31, so that the crop 16 to be dug up is on the inward side in the machine width direction of the digging tool 31. It is moved (inflows) toward (center side of K1 in the machine width direction). As a result, the crop 16 is less likely to be caught on the first side plate 36L side and the second side plate 36R side (see FIG. 2), which will be described later.

In addition, although the leading edge portion 33 of the excavator 31 is formed in an inclined shape, it may be formed in an inclined shape in which the front edge portion 33 of the excavator 31 shifts forward from both ends of the machine width direction K1 toward the center of the machine width direction K1. It is conceivable, but in this case, soil tends to stay in the central part of the digging tool 31 in the machine width direction K1, and the crop 16 to be dug up is moved to the outer side in the machine width direction of the digging tool 31 and the first side plate 36L. There is a risk that the crop 16 will be caught on the side and the second side plate 36R side.

As shown in FIG. 5, the rear portion of the excavator 31 is slightly bent upward with respect to the front portion. Since the leading edge portion 33 of the excavator 31 is inclined so as to move backward toward the central portion in the machine width direction K1, there is a difference in cutting height between both ends of the excavator 31 and the central portion. It is desirable that the front part of the excavator 31 is close to the horizontal state in order to prevent it from occurring, and by bending the rear part of the excavator 31 upward with respect to the front part, the excavated crop 16 is transported. It forms a guiding surface that guides the body 27 toward the upper surface. In the present embodiment, the rear portion of the excavator 31 is bent, but the guide surface may be configured as a separate body. Further, as shown in FIG. 6B, the guide surface 31B may have a slatted shape having a notch long in the front-rear direction so that soil does not stay on the guide surface 31B. Further, a plurality of holes may be formed on the guide surface.

Explaining in detail the form of the excavator 31 shown in FIG. 6B, the excavator 31 has a main body portion 31A at the front portion and a guide surface 31B at the rear portion. The leading edge portion 33 of the main body portion 31A (digging tool 31) is inclined from one end and the other end of the machine width direction K1 of the digging tool 31 toward the center of the machine width direction K1. The rear portion of the main body portion 31A is attached to the erection member 38 described later. The guide surface 31B is composed of a plurality of protrusions 31Ba. The protruding portions 31Ba project rearward from the trailing edge portion of the main body portion 31A, and are arranged side by side at intervals in the machine width direction K1 from one end to the other end of the main body portion 31A.

As shown in FIGS. 5 and 6A, the mounting member 32 has a first plate 37L, a second plate 37R, an erection member 38, a pivot portion 39, and a fixing portion 40. The first plate 37L is arranged so as to be in contact with the inner surface of the front portion of the first side frame 18L in the machine width direction. The second plate 37R is arranged so as to be in contact with the inner surface of the front portion of the second side frame 18R in the machine width direction. The erection member 38 is provided over the first plate 37L and the second plate 37R. One end side of the erection member 38 is fixed to the first plate 37L, and the other end side is fixed to the second plate 37R. The rear portion of the excavator 31 is superposed on the upper surface of the erection member 38, and the excavator 31 is attached to the erection member 38 by a screw member 41 that penetrates the rear portion of the excavator 31 and is screwed into the erection member 38. ing. The pivot portion 39 is formed by a pin or the like, and supports the first plate 37L and the second plate 37R so as to be swingable around the axis extending in the machine width direction K1. Specifically, the pivot portion 39 has a first pin 39L that supports the first plate 37L and a second pin 39R that supports the second plate 37R, and the first pin 39L is attached to the first side frame 18L. The 1 plate 37L is swingably supported around the axis extending in the machine width direction K1, and the second pin 39R is located around the axis extending the second plate 37R to the second side frame 18R in the machine width direction K1. Supports swingable. The first plate 37L and the second plate 37R are formed with an arc-shaped guide hole 42 centered on the pivot portion 39. The fixing portion 40 fixes the swing around the pivot portion 39 of the first plate 37L and the second plate 37R. Specifically, the fixing portion 40 includes a first fixing portion 40L composed of a bolt penetrating the guide hole 42 and the first side frame 18L of the first plate 37L and a nut into which the bolt is screwed, and a second plate. It has a guide hole 42 of 37R, a second fixing portion 40R composed of a bolt penetrating the second side frame 18R and a nut into which the bolt is screwed. By tightening the fixing portion 40, the swing of the first plate 37L and the second plate 37R is fixed, and by loosening the fixing portion 40, the swing of the first plate 37L and the second plate 37R is allowed. That is, the fixing portion 40 can fix the swinging positions of the first plate 37L and the second plate 37R at arbitrary positions. In other words, the excavator 31 is attached to the machine frame 17 so that the position in the vertical direction on the leading edge portion 33 side can be adjusted around the axis extending in the machine width direction K1. Therefore, although the excavator 31 is attached in a horizontal state in the example shown in FIG. 5, it can also be attached in a downwardly inclined shape.

As shown in FIG. 2, the front portion of the machine frame 17 includes a first side plate 36L arranged on one side (left side) side of the excavator 31, and another side portion (right side portion) of the excavator 31. A second side plate 36R arranged on the) side is provided. The first side plate 36L and the second side plate 36R can regulate the crop 16 excavated by the excavator 31 from escaping to the outside of the machine width direction K1. As shown in FIG. 3, the first side plate 36L and the second side plate 36R are arranged above the excavator 31. As shown in FIG. 4, the first side plate 36L is attached to the first side frame 18L (front frame 20L), and the second side plate 36R is attached to the second side frame 18R (front frame 20R). .. The first side plate 36L and the second side plate 36R are attached so as to be vertically adjustable. As shown in FIGS. 4 and 7A, the first side plate 36L and the second side plate 36R project forward from the excavator 31. Further, the front portions of the first side plate 36L and the second side plate 36R are formed in an inclined shape that shifts outward in the machine width direction toward the front.

As shown in FIGS. 4 and 7A, the excavator 4 has an interval adjusting portion 43 for adjusting the positions of the first side plate 36L and the second side plate 36R inward in the machine width direction K1. The space adjusting portion 43 includes a first adjusting portion 43L provided between the first side frame 18L and the first side plate 36L to adjust the position of the first side plate 36L, and the second side frame 18R and the second side plate 36R. Includes a second adjusting unit 43R that is provided between the two and adjusts the position of the second side plate 36R. As shown in FIGS. 2 and 7A, the first adjusting portion 43L includes a nut member 44 fixed to the outer surface of the first side plate 36L in the machine width direction, and a bolt member 45 screwed into the nut member 44. It has a collar 46 interposed between the nut member 44 and the first side frame 18L (front frame 20). The bolt member 45 penetrates the first side frame 18L and the collar 46 and is screwed into the nut member 44.

The second adjusting unit 43R is also configured in the same manner as the first adjusting unit 43L. That is, in the second adjusting portion 43R, the nut member 44 is fixed to the outer surface of the second side plate 36R in the machine width direction, and the bolt member 45 holds the second side frame 18R (front frame 20) and the collar 46. It penetrates and is screwed into the nut member 44.
The collar 46 can adjust the positions of the first side plate 36L and the second side plate 36R in the machine width direction K1. That is, by changing the number of collars 46 or replacing them with collars 46 having different lengths, the distance W2 between the first side plate 36L and the second side plate 36R in the machine width direction K1 can be shortened or widened.

As shown in FIG. 8, when the distance W2 between the first side plate 36L and the second side plate 36R in the machine width direction K1 is larger than the width (upper surface width) W3 of the upper surface 15a of the ridge 15, the ridge 15 and the first side plate There is a risk that the crop 16 dug up between the 36L or the second side plate 36R will fall. Fallen onions are often a loss. The size of the ridge 15 (upper surface width W3) varies depending on the district. In the present embodiment, since the interval adjusting portion 43 for adjusting the positions of the first side plate 36L and the second side plate 36R inward in the machine width direction K1 is provided, the interval W2 can be adjusted to the upper surface width W3 of the ridge 15. It is possible to prevent the dug up crop 16 from falling between the ridge 15 and the first side plate 36L or the second side plate 36R. That is, the number of onions that fall and are damaged from between the ridge 15 and the first side plate 36L or the second side plate 36R is reduced. In addition, it is possible to deal with areas where the ridges 15 have different sizes by rearranging parts.

The distance W2 between the first side plate 36L and the second side plate 36R can be adjusted in increments of 50 mm, for example, from 850 to 1100 mm.
The distance adjustment between the first side plate 36L and the second side plate 36R is not limited to the structure by the collar 46. For example, the first side plate 36L and the second side plate 36R may be adjusted in position in the machine width direction K1 by a screw structure, or the first side plate 36L may be formed by a telescopic structure in which a plurality of cylinders are nested. And the position of the second side plate 36R may be adjustable.

Further, as shown in FIG. 7B, the distance adjustment between the first side plate 36L and the second side plate 36R is performed by swinging the first side plate 36L and the second side plate 36R in the machine width direction K1. You may. Specifically, the first side plate 36L is swingably connected to the first side frame 18L via the first adjusting portion 43L in the machine width direction K1, and the second side plate 36R is connected via the second adjusting portion 43R. It is swingably connected to the second side frame 18R in the machine width direction K1. The first adjusting portion 43L has a tubular member 51 fixed to the first side frame 18L, and a shaft member 52 rotatably inserted around the axial center extending in the vertical direction into the tubular member 51. The first side plate 36L is integrally rotatably supported by the shaft member 52. The second adjusting portion 43R has a tubular member 51 fixed to the second side frame 18R, and a shaft member 52 rotatably inserted around the axial center extending in the vertical direction into the tubular member 51. The second side plate 36R is integrally rotatably supported by the shaft member 52. The rotation of the shaft member 52 with respect to the tubular member 51 is fixed by a pin or the like. The structure for swinging the first side plate 36L and the second side plate 36R is not limited to the structure shown in FIG. 7B.

As shown in FIGS. 4 and 7A, a first cover plate 53L that covers the gap between the first side plate 36L and the first side frame 18L is provided on the inner side of the first side plate 36L in the machine width direction. .. The first cover plate 53L is provided from the first side plate 36L to the first side frame 18L, and is fixed to the first side plate 36L and the first side frame 18L. Further, a second cover plate 53R that covers the gap between the second side plate 36R and the second side frame 18R is provided on the inner side of the second side plate 36R in the machine width direction. The second cover plate 53R is provided from the second side plate 36R to the second side frame 18R, and is fixed to the second side plate 36R and the second side frame 18R.

The first cover plate 53L and the second cover plate 53R are made of a flexible resin plate material. The first portion 54L from the first side plate 36L to the first side frame 18L in the first cover plate 53L is provided with a slack. Further, the second portion 54R from the second side plate 36R to the second side frame 18R in the second cover plate 53R is also provided with a slack. As a result, even if the position of the first side plate 36L is adjusted, the first cover plate 53L is deformed in the first portion 54L to allow the position adjustment of the first side plate 36L. Further, even if the position of the second side plate 36R is adjusted, the second cover plate 53R is deformed in the second portion 54R to allow the position adjustment of the second side plate 36R.

The first cover plate 53L and the second cover plate 53R do not necessarily have to be made of a flexible plate material. In this case, after adjusting the positions of the first side plate 36L and the second side plate 36R, they may be attached later.
As shown in FIG. 3, the carrier 27 has a drive shaft 56, a drive wheel 57, a driven wheel 58, and an endless deadhead 59. The drive shaft 56 is provided at the rear of the carrier 27. The power of the output shaft 25 of the transmission case 22 is transmitted to the drive shaft 56 via the transmission mechanism 28. The drive wheel 57 can rotate integrally with the drive shaft 56. The driven wheel 58 is provided on the front portion of the carrier 27. The endless rotating body 59 is wound around the drive wheel 57 and the driven wheel 58, and is driven by the drive wheel 57 to circulate and move so as to transport the crop 16 to the rear (rear and upper) on the upper side.

As shown in FIG. 4, the endless deadhead 59 has a left and right endless chains 61 and a plurality of transport rods 62 provided over the left and right endless chains 61. As shown in FIG. 3, the endless chain 61 has a plurality of links 63 arranged in an endless shape (loop shape), and the plurality of links 63 are pivotally connected by a transport rod 62. That is, the end side of the transport rod 62 constitutes a pin that pivotally connects the plurality of links 63 of the endless chain 61 to each other. The endless chain 61 is wound around the drive wheel 57 and the driven wheel 58. Therefore, the drive wheels 57 and the driven wheels 58 are provided on the left and right sides of the carrier 27, corresponding to the left and right endless chains 61.

As shown in FIG. 4, the excavator 4 adjusts the discharge width W4 which is the width of the discharge path 64 of the discharge path 64 of the crop 16 discharged from the rear end 27a side of the transport body 27 in the machine width direction K1. It is equipped with. The discharge guide mechanism 66 has a first guide plate 67L provided on the left side of the transport body 27 and a second guide plate 67R provided on the right side of the transport body 27.
As shown in FIG. 4, the first guide plate 67L can rotate about an axial center whose front portion extends vertically to 68L of a pivot point portion (first pivot point portion) provided on the first side frame 18L. It is supported by. The first guide plate 67L is arranged in an inclined shape in which the first guide plate 67L shifts inward in the machine width direction toward the rear from the first pivot point portion 68L in a plan view. As shown in FIG. 3, the first guide plate 67L extends in the inclined direction of the carrier 27 toward the rear from the first pivot point portion 68L in a side view, and extends downward on the rear side of the carrier 27. It is bent like this.

As shown in FIG. 4, the second guide plate 67R can rotate about an axial center whose front portion extends in the vertical direction to the pivot point portion (second pivot point portion) 68R provided on the second side frame 18R. It is supported by. The second guide plate 67R is arranged in an inclined shape in which the second guide plate 67R shifts inward in the machine width direction toward the rear from the second pivot point portion 68R in a plan view. As shown in FIG. 3, the second guide plate 67R extends in the inclined direction of the carrier 27 on the side surface toward the rear from the second pivot point portion 68R, and extends downward on the rear side of the carrier 27. It is bent to.

The discharge width W4 can be adjusted by rotating the first guide plate 67L around the first pivot point portion 68L and rotating the second guide plate 67R around the second pivot point portion 68R.
As shown in FIG. 4, the discharge guide mechanism 66 includes a first swing regulator 69L that regulates the swing of the first guide plate 67L and a second swing regulator that regulates the swing of the second guide plate 67R. It has 69R.

As shown in FIG. 9, the rear end side of the first cover plate 53L is formed so as to extend to the first pivot point portion 68L of the discharge guide mechanism 66. The rear end side of the second cover plate 53R is formed so as to extend to the second pivot point portion 68R of the discharge guide mechanism 66. This makes it possible to prevent the onions from accumulating unnecessarily.
As shown in FIGS. 3 and 4, the leveling mechanism 29 is provided behind the excavator 31. The ground leveling mechanism 29 has a ground leveling plate 71 for leveling the upper surface 15a of the ridge 15. The ground leveling plate 71 is arranged below the rear end 27a side of the transport body 27 and at least the front portion 71a is arranged in front of the rear end 27a of the transport body 27. In other words, the ground preparation plate 71 has at least the front portion 71a arranged in the area where the carrier 27 is projected. Further, the rear end 71d of the ground preparation plate 71 is located in front of the rear end 27a of the carrier 27. In other words, the entire ground leveling plate 71 is arranged in the area.

As shown in FIG. 3, the rear end 27a of the transport body 27 is the rear end of the transport rod 62A located at the rear end portion of the endless rotating body 59. In FIG. 3, the line h shows a vertical line in contact with the rear end of the transport rod 62A, and the rear end 71d of the ground level plate 71 is located in front of the line h. The rear end 71d of the ground preparation plate 71 may slightly protrude rearward from the rear end 27a of the transport body 27 to the extent that the crop 16 falling from the rear end 27a side of the transport body 27 does not come into contact with the rear end 71d.

As shown in FIG. 4, the width W6 of the ground preparation plate 71 in the machine width direction K1 is formed to be narrower than the width W5 of the carrier 27 in the machine width direction K1. The soil dug up by the excavator 31 is transported by the transport body 27 together with the crop 16, and falls from between the transport rods 62 of the transport body 27 while being transported by the transport body 27. Since the width W6 of the ground leveling plate 71 in the machine width direction K1 is formed to be narrower than the width W5 of the machine width direction K1 of the carrier 27, excess soil at the time of leveling is escaped from both ends of the ground leveling plate 71. It is possible to prevent the soil from staying in front of the ground leveling plate 71. Further, since the soil missed from both ends of the ground preparation plate 71 forms a step on the upper surface 15a of the ridge 15, the crop 16 that has fallen on the upper surface 15a of the ridge 15 can be prevented from falling from the upper surface 15a of the ridge 15. can.

As shown in FIG. 10, the ground leveling plate 71 has a first plate material 71A made of metal and a second plate material 71B made of resin attached and fixed to the lower surface of the first plate material 71A. The ground leveling plate 71 is bent so as to be recessed downward at the bent portion 71c in the middle portion of the front-rear direction A3. A stay piece 72 is fixed to the leveling plate 71. As shown in FIG. 11, the stay piece 72 is fixed to the left side and the right side of the ground level plate 71.

As shown in FIGS. 11 and 12, the leveling mechanism 29 has an erection member 73 provided over the rear portion of the first side frame 18L (main frame 19L) and the rear portion of the second side frame 18R (main frame 19R). is doing. The erection member 73 is formed by a groove-shaped member having a downward opening. One end side of the erection member 73 in the longitudinal direction is attached to the plate member 74 fixed to the rear part of the first side frame 18L, and the other end side is attached to the plate member 74 fixed to the rear part of the second side frame 18R. Has been done. A mounting plate 75 to be attached to the plate member 74 is fixed to the end side and the other end side of the erection member 73 (see FIG. 12).

The ground leveling plate 71 is arranged below the erection member 73 so that the center of the ground leveling plate 71 in the machine width direction K1 and the center of the erection member 73 in the machine width direction K1 substantially coincide with each other. A support plate 76 that pivotally supports the ground preparation plate 71 is arranged on the left side stay piece 72 and the right side stay piece 72 on the outer side in the machine width direction (see FIGS. 10 and 12). The support plate 76 is fixed to the erection member 73, and the stay piece 72 is rotatably supported around the axis whose front portion extends to the support plate 76 in the machine width direction K1 via the pivot 77. Therefore, in the ground preparation plate 71, the front portion 71a on the front side of the bent portion 71c is pivotally supported by the erection member 73 via the pivot shaft 77.

As shown in FIG. 12, a stopper 78 is fixed to the support plate 76 to regulate the upward swing of the ground preparation plate 71 by abutting on the stay piece 72. The stopper 78 may be fixed to the stay piece 72 and may be configured to come into contact with the support plate 76.
As shown in FIG. 10, the ground leveling mechanism 29 includes a pressurizing mechanism 79 that pressurizes the ground leveling plate 71 toward the upper surface 15a of the ridge 15. By pressurizing the ground preparation plate 71 toward the upper surface 15a of the ridge 15 by the pressurizing mechanism 79, the ground preparation plate 71 forms a dent 80 on the upper surface 15a of the ridge 15 as shown in FIG. By forming the dent 80 on the upper surface 15a of the ridge 15, the crop 16 that has fallen from the rear end 27a side of the carrier 27 to the upper surface 15a of the ridge 15 can be prevented from falling from the upper surface 15a of the ridge 15. can. As a result, the work of picking up the crop 16 that has fallen on the upper surface 15a of the ridge 15 with a picker or the like can be easily performed. Further, by leveling the upper surface 15a of the ridge 15 with the ground leveling plate 71, the crop 16 that has fallen from the rear end 27a side of the carrier 27 to the upper surface 15a of the ridge 15 can be prevented from being buried in the soil. This makes it easier to dry the crop 16 and also makes it easier to pick it up.

As shown in FIG. 14, by changing the shape of the ground preparation plate 71, a dent 80 having a deep central portion in the width direction (ridge width direction) of the ridge 15 may be formed on the upper surface 15a of the ridge 15. Specifically, the dent 80 that gradually becomes shallower from the central portion in the ridge width direction to the outside in the ridge width direction may be formed. As a result, the crop 16 that has fallen from the rear end 27a side of the carrier 27 to the upper surface 15a of the ridge 15 can be brought closer to the central portion in the ridge width direction.

In this case, the ground preparation plate 71 is formed in a shape in which a portion having a plate width, which is the width in the front-rear direction A3, shifts upward from the central portion of the machine width direction K1 toward the outside of the machine width direction K1. FIG. 14 illustrates a case where the cross-sectional shape of the ground preparation plate 71 cut along a plane parallel to the machine width direction K1 is a curved shape that is convex downward, but the present invention is not limited to this. It suffices that a dent 80 having a deep central portion in the ridge width direction and gradually becoming shallower toward the outside in the ridge width direction is formed on the upper surface 15a of the ridge 15.

As shown in FIG. 10, the pressurizing mechanism 79 is arranged below the transport body 27 and pressurizes an intermediate portion between the front portion 71a and the rear portion 71b of the ground leveling plate 71. In the illustrated example, the pressurizing mechanism 79 pressurizes the rear side of the bent portion 71c. The pressurizing mechanism 79 has a support bracket 81, an interlocking member 82, and an urging member 83. The support bracket 81 has a vertical wall 81a and a horizontal wall 81b extending rearward from the upper end of the vertical wall 81a. The vertical wall 81a is fixed to the back surface of the erection member 73 with bolts or the like. The interlocking member 82 has a rod portion 82A and a connecting portion 82B fixed to the lower end of the rod portion 82A. The rod portion 82A penetrates the side wall 81b so as to be movable in the vertical direction. A washer 84 and a pin 85 for preventing the washer 84 from coming off are provided on the upper portion of the rod portion 82A, and the downward movement of the rod portion 82A (downward swing of the ground level plate 71) is regulated by these washers 84 and the pin 85. To. Further, a ring disk-shaped spring receiver 86 is fitted in the rod portion 82A so as to be movable in the axial direction. The spring receiver 86 is restricted from moving downward by a pin 87 on the lower side of the rod portion 82A. The connecting portion 82B is pivotally connected to the stay piece 72 via a support shaft 88 having an axial center extending in the machine width direction K1. The urging member 83 is composed of a compression coil spring and is fitted to the outside of the rod portion 82A between the side wall 81b and the spring receiver 86.

In the pressurizing mechanism 79 having the above configuration, the urging member 83 is compressed by swinging upward around the pivot 77 when the ground leveling plate 71 touches the upper surface 15a of the ridge 15. The urging force of the urging member 83 pressurizes the ground leveling plate 71 toward the upper surface 15a of the ridge 15.
The urging member 83 is not limited to the compression coil spring. For example, the urging member 83 may be a torsion coil spring.

FIG. 15 shows a modified example of the support structure of the ground preparation plate 71. In this support structure, the end portion of the erection member 73 formed in an L shape is fixed to the front portion of the mounting plate 89 attached to the plate member 74. The end of the support bracket 81 is fixed to the mounting plate 89.
By the way, when leveling the upper surface 15a of the ridge 15 after digging with the excavator 31, it is conceivable to level the ground with a roller, but in the case of leveling with a roller, when the soil collects in front of the roller, the roller rotates. It disappears, soil stays, and finally the carrier 27 locks (stops). The only way to recover is to lift the excavator 4 once. In order for the suppression by the rollers to always function, the roller diameter may be increased, but for that purpose, it is necessary to increase the inclination angle of the conveying body 27 or increase the length of the conveying body 27 in the front-rear direction. Increasing the tilt angle of the carrier 27 increases the amount of soil staying. When the carrier 27 is lengthened, the headland increases. Further, when the roller protrudes rearward from the rear end 27a of the carrier 27, it comes into contact with the crop 16 to be discharged.

In the present embodiment, by adopting the ground leveling plate 71 for leveling the upper surface 15a of the ridge 15, it can be compactly arranged below the transport body 27. Further, the front portion of the ground preparation plate 71 is pivotally supported, and the middle portion is pressurized by the pressurizing mechanism 79, so that the upper surface 15a of the ridge 15 is followed.
As shown in FIG. 1, the excavator 4 includes a mast 91 to which the three-point link mechanism 3 is connected. The mast 91 has a main frame 91A and a subframe 91B. The main frame 91A is provided so that the lower portion protrudes forward from the machine frame 17, and the upper portion extends upward from the front portion of the lower portion. The subframe 91B connects the upper part and the lower part of the main frame 91A. The main frame 91A and the subframe 91B are provided on one side and the other side of the machine frame 17 in the machine width direction K1. That is, a pair of the main frame 91A and the subframe 91B is provided.

As shown in FIG. 1, the excavator 4 has an attitude adjusting mechanism 92 that automatically adjusts the attitude of the excavator 4 when the three-point link mechanism 3 rises. The posture adjusting mechanism 92 digs the crop 16 remaining in the digging machine 4 when the digging machine 4 is lifted by the three-point link mechanism 3 from the working posture 105 of FIG. 1 for digging the crop 16. The posture of the excavator 4 is automatically adjusted so as to have a fall restraint posture 104 (see FIG. 20) that suppresses the fall from the tool 31 to the front side.

The posture adjusting mechanism 92 is provided on the mast 91.
As shown in FIGS. 16 and 17, the posture adjusting mechanism 92 has a swing piece 93 and an engaging pin 94. The rocking piece 93 is arranged between the upper parts of the pair of mainframes 91A. Specifically, the rocking piece 93 is provided inside one mainframe 91A and inside the other mainframe 91A. There is. That is, a pair of rocking pieces 93 are provided. The pair of rocking pieces 93 are arranged to face each other at intervals in the machine width direction K1. The pair of rocking pieces 93 are connected by a tubular member 95 in the middle.

The vertical portion of the rocking piece 93 is rotatably supported by the main frame 91A (mast 91) around the axis extending in the machine width direction K1 by the pivot shaft 96. The pivot shaft 96 is composed of a main frame 91A, a swing piece 93, and a bolt member through which a tubular member 95 is inserted. As shown in FIG. 17, the pivot shaft 96 is prevented from coming off by the nut member 97.

As shown in FIG. 17, the upper side (upper side of the pivot shaft 96) of the swing piece 93 is a top link connecting portion 101 to which the top link 11 is connected. A connecting portion 11A on the rear end side of the top link 11 is arranged between the pair of top link connecting portions 101, and the connecting portion 11A rotates about an axis extending to the top link connecting portion 101 in the machine width direction K1. It is possible to be pivotally connected.

An engagement hole 98 is formed on the lower side (lower side of the pivot shaft 96) of the swing piece 93. The engaging hole 98 is formed in an arcuate elongated hole centered on the pivot shaft 96.
The engagement pin 94 is provided on the mast 91. The engagement pin 94 penetrates the mast 91 and the engagement hole 98 and is attached to the mast 91. A collar 99 is fitted on the outside of the engaging pin 94. The engaging hole 98 is formed so that when the swing piece 93 swings around the pivot shaft 96, the engaging pin 94 moves from one end 98a of the engaging hole 98 to the other end 99b.

A pair of pin holes 100a and 100b are formed in the swing piece 93. The pair of pin holes 100a and 100b are formed on the upper side of the engaging hole 98, one pin hole 100b is formed on one end 98a side in the longitudinal direction of the engaging hole 98, and the other pin hole 100a is formed on the engaging hole 98. It is formed on the other end 98b side in the longitudinal direction of the above.
In the case of the above configuration, when the three-point link mechanism 3 is swung upward from the state where the excavator 4 is in the working posture 105, the weight of the excavator 4 acting on the engaging pin 94 is shown in the figure. As shown in 18, the swing piece 93 swings around the pivot shaft 96 so that the engagement pin 94 moves from the one end 98a side to the other end 98b side of the engagement hole 98. As a result, as shown in FIG. 19, the front side of the excavator 4 is lifted. By lifting the front side of the digging machine 4, the digging tool 31 is tilted upward. After the engaging pin 94 moves to the other end 98b side of the engaging hole 98, when the three-point link mechanism 3 further swings upward, the excavator 4 rises integrally with the three-point link mechanism 3, and FIG. 20 It is lifted to the fall restraint posture 104 shown in. Further, since the top link 11 and the lower link 12 swing upward in an arc shape around the pivot point at the front portion, after the engagement pin 94 moves to the other end 98b side of the engagement hole 98, the excavator 4 is lifted higher on the rear side than on the front side. Then, in the present embodiment, the excavator 31 becomes substantially horizontal in the fall restraint posture 104. That is, the fall restraint posture 104 is a posture in which the excavator 31 is substantially horizontal. The fall restraint posture 104 may be a posture in which the excavator 31 faces upward from the horizontal. Further, the fall restraint posture 104 may be a posture in which the excavator 31 is slightly downward from the horizontal position.

As described above, in the engaging hole 98, when the elevating link mechanism 3 is raised from the state where the excavator 4 is in the working posture 105, the engaging pin 94 moves from one end 98a to the other end 98b of the engaging hole 98. By moving to, the front part of the excavator 4 is lifted and the excavator 31 is tilted upward, and by further raising the elevating link mechanism 3, the rear part of the excavator 4 is lifted and excavated from the front part. The tool 31 is formed to have a length that makes it substantially horizontal.

Conventionally, when the excavator 4 is lifted by the three-point link mechanism 3, the posture of the excavator 4 cannot be changed. Therefore, when the excavator 4 is lifted when turning on a headland or the like, the excavator 4 is lifted in a forward-down state. Then, the crop 16 that cannot be completely discharged by the transport body 27 and remains in the excavator 4 falls.
In the present embodiment, when the excavator 4 is lifted by the three-point link mechanism 3, the excavator 4 is lifted so that the front side of the excavator 4 is first lifted and then the rear side is lifted more than the front side. Since the posture of the digging machine 4 is automatically adjusted, when the digging machine 4 is lifted by the three-point link mechanism 3, the digging machine 4 is suppressed from falling forward, and the crop 16 remaining in the digging machine 4 is suppressed. Can be suppressed from falling.

Further, as shown in FIG. 21, in the fall restraint posture 104, the embankment 103 is formed by the soil on the excavator 31. The bank 103 can prevent the crop 16 remaining on the carrier 27 from falling forward from the excavator 31.
As shown in FIG. 22, the posture adjusting mechanism 92 has a regulation pin 102 that is detachably attached to the swing piece 93. The regulation pin 102 is attached by inserting the other pin hole 100a located on the other end 98b side of the engagement hole 98. When the three-point link mechanism 3 is raised from the state where the excavator 4 is in the working posture 105 with the regulation pin 102 attached, the regulation pin 102 comes into contact with the mast 91 and the rocking piece 93 is shaken. Movement is regulated. By fixing the swing of the swing piece 93, when the excavator 4 is lifted, the excavator 4 is lifted higher than the fall restraint posture 104. As a result, it is possible to secure the lifting height of the excavator 4 when the ground working machine 1 is moved.

The excavator 4 of the present embodiment is formed of a machine frame 17 and a plate material attached to the front portion of the machine frame 17 so that the plate surface faces in the vertical direction, and the machine frame 17 moves forward to move the crop 16 The digging tool 31 comprises a digging tool 31 for digging the crop 16 while cutting the root 16a of the shavings, and a carrier 27 for transporting the crop 16 dug by the digging tool 31 rearward and upward. The front edge portion 33 is formed in an inclined shape in which the front edge portion 33 shifts rearward from both ends of the machine width direction K1 which is the width direction of the machine frame 17 toward the central portion of the machine width direction K1.

According to this configuration, the leading edge portion 33 of the excavator 31 slides on the root 16a of the crop 16 as the machine frame 17 advances, so that the root 16a of the crop 16 can be cut satisfactorily.
Further, the excavator 31 is formed so that the plate width W1, which is the width in the front-rear direction A3, becomes wider from the central portion of the machine width direction K1 toward the outside of the machine width direction K1.

According to this configuration, the crop 16 can be moved toward the central portion of the machine width direction K1 by accumulating soil on both sides of the machine width direction K1 of the excavator 31.
Further, the excavator 31 is attached to the machine frame 17 so that the position in the vertical direction on the leading edge portion 33 side can be adjusted around the axis extending in the machine width direction K1.
According to this configuration, the angle of the excavator 31 can be adjusted with respect to the root 16a of the crop 16.

Further, the machine frame 17 is provided with a mounting member 32 to which the excavator 31 is mounted, and the machine frame 17 is arranged at a distance between the first side frame 18L and the first side frame 18L in the machine width direction K1. It has a frame 18R, the excavator 31 is arranged in the front portion between the first side frame 18L and the second side frame 18R, and the mounting member 32 is arranged in the front portion of the first side frame 18L. The first plate 37L, the second plate 37R arranged at the front of the second side frame 18R, and the erection member 38 provided over the first plate 37L and the second plate 37R to which the excavator 31 is attached. , The pivot portion 39 that swingably supports the first plate 37L and the second plate 37R around the axis extending in the machine width direction K1, and the pivot portion 39 of the first plate 37L and the second plate 37R. The fixing portion 40 has a fixing portion 40 for fixing the above, and the fixing portion 40 can fix the swinging positions of the first plate 37L and the second plate 37R at arbitrary positions.

According to this configuration, the angle adjusting mechanism of the excavator 31 can be constructed with a simple structure.
Further, the digging machine 4 is attached to the machine frame 17 and the front part of the machine frame 17, and the machine frame 17 moves forward to dig up the crop 16 cultivated in the ridge 15 and the digging tool 31. The machine frame 17 includes a first side plate 36L arranged on one side of the tool 31, a second side plate 36R arranged on the other side of the excavator 31, and a first side plate 36L and a second side plate 36R. It is provided with an interval adjusting unit 43 for adjusting the position inward in the machine width direction K1 which is the width direction of the machine.

According to this configuration, the distance between the first side plate 36L and the second side plate 36R can be adjusted to the width of the upper surface 15a of the ridge 15. As a result, it is possible to prevent the crop 16 excavated by the excavator 31 from falling from the ridge 15.
Further, the machine frame 17 has a first side frame 18L arranged on one side of the excavator 31 and a second side frame 18R arranged on the other side of the excavator 31, and the spacing is adjusted. The portion 43 is provided between the first side frame 18L and the first side plate 36L, and is provided between the first adjusting portion 43L for adjusting the position of the first side plate 36L, and between the second side frame 18R and the second side plate 36R. It has a second adjusting portion 43R for adjusting the position of the second side plate 36R.

According to this configuration, the first side plate 36L can be supported by the first adjusting portion on the first side frame 18L, and the second side plate 36R can be supported by the second adjusting portion on the second side frame 18R.
Further, the first adjusting unit 43L adjusts the position of the first side plate 36L by the collar 46 provided between the first side frame 18L and the first side plate 36L, and the second adjusting unit 43R adjusts the position of the first side plate 36L. The position of the second side plate 36R is adjusted by the collar 46 provided between the second side plate 36R and the second side plate 36R.

According to this configuration, the interval adjusting unit 43 can be constructed with a simple structure.
Further, the first cover plate 53L which is provided from the first side plate 36L to the first side frame 18L and covers the gap between the first side plate 36L and the first side frame 18L, and the second side plate 36R to the second side frame 18R. It is provided with a second cover plate 53R that is provided so as to cover the gap between the second side plate 36R and the second side frame 18R.

According to this configuration, the first cover plate 53L can prevent the crop 16 from entering the gap between the first side plate 36L and the first side frame 18L, and the second cover plate 53R can prevent the second side plate 36R and the second side. It is possible to prevent the crop 16 from entering the gap with the frame 18R.
Further, the first cover plate 53L and the second cover plate 53R are made of a flexible plate material.

According to this configuration, the first cover plate 53L and the second cover plate 53R can be made to follow the position adjustment of the first side plate 36L and the second side plate 36R.
Further, the first side plate 36L is swingably connected to the first side frame 18L in the machine width direction K1, and the second side plate 36R is swingably connected to the second side frame 18R in the machine width direction K1. It may have been done.

Further, the digging machine 4 conveys the digging tool 31 for digging the crop 16 cultivated in the ridge 15 and the crop 16 dug by the digging tool 31 rearward and upward, and the ridge 15 on the rear end 27a side. The transport body 27 to be dropped onto the upper surface 15a of the ridge 15 and the front portion 71a below the rear end 27a side of the transport body 27 are arranged in front of the rear end 27a of the transport body 27 to level the upper surface 15a of the ridge 15. It is equipped with a ground leveling plate 71.

According to this configuration, the upper surface 15a of the ridge 15 after being dug up by the excavator 31 is leveled with the ground leveling plate 71 to prevent the crop 16 dropped and discharged from the carrier 27 from being buried in the soil. can do.
Further, the rear end 71d of the ground preparation plate 71 is located in front of the rear end 27a of the carrier 27.

According to this configuration, it is possible to prevent the ground preparation plate 71 from interfering with the crop 16 falling from the rear end 27a side of the carrier 27.
Further, the digging machine 4 conveys the digging tool 31 for digging the crop 16 cultivated in the ridge 15 and the crop 16 dug by the digging tool 31 rearward and upward, and the ridge 15 on the rear end 27a side. The carrier 27 is dropped onto the upper surface 15a of the ridge 15, and the ground leveling plate 71 is provided so that at least the front portion is arranged in the area where the carrier 27 is projected and the upper surface 15a of the ridge 15 is leveled.

According to this configuration, it is possible to prevent the crop 16 that has fallen and discharged from the carrier 27 from being buried in the soil.
Further, the entire ground leveling plate 71 is arranged in the area.
According to this configuration, it is possible to prevent the ground preparation plate 71 from interfering with the crop 16 falling from the rear end 27a side of the carrier 27.

Further, a pressurizing mechanism 79 for pressurizing the ground leveling plate 71 toward the upper surface 15a of the ridge 15 is provided, and the ground leveling plate 71 forms a dent 80 on the upper surface of the ridge 15 by pressurization.
According to this configuration, it is possible to prevent the crop 16 that has fallen and discharged from the carrier 27 from falling from the ridge 15.
Further, the pressurizing mechanism 79 includes a pivot shaft 77 that pivotally supports the front portion 71a of the ground preparation plate 71 around the axis extending in the machine width direction K1 which is the width direction of the excavator 4 below the transport body 27. It is arranged below the carrier 27 and pressurizes the middle portion between the front portion 71a and the rear portion 71b of the ground preparation plate 71.

According to this configuration, it is possible to prevent the pressurizing mechanism 79 from interfering with the discharge of the crop 16.
Further, a machine frame 17 to which the excavator 31 is attached is provided, and the machine frame 17 is arranged at a distance between the first side frame 18L and the first side frame 18L in the machine width direction K1. The carrier 27 has a frame 18R, and the carrier 27 is arranged between the first side frame 18L and the second side frame 18R. It is formed narrower than the width W6 of K1.

According to this configuration, when the upper surface 15a of the ridge 15 on which the soil dug up by the excavator 31 and the soil falling from the carrier 27 are deposited is leveled, excess soil can be escaped from both ends of the leveling plate 71. , It is possible to suppress the accumulation of soil in front of the ground leveling plate 71. Further, since the soil missed from both ends of the ground preparation plate 71 forms a step on the upper surface 15a of the ridge 15, the crop 16 that has fallen on the upper surface 15a of the ridge 15 can be prevented from falling from the upper surface 15a of the ridge 15. can.

Further, the discharge guide mechanism 66 for adjusting the discharge width W4, which is the width of the discharge path 64 of the crop 16 discharged from the rear end 27a side of the transport body 27 in the machine width direction K1, is provided.
According to this configuration, the crop 16 can be dropped on the ridge 15 after the ground leveling plate 71 has been leveled.
Further, the ground level plate 71 is formed in a shape in which a portion having a plate width, which is the width in the front-rear direction A3, shifts upward from the central portion of the machine width direction K1 toward the outside of the machine width direction K1.

According to this configuration, since the dent 80 formed by the ground preparation plate 71 becomes deeper toward the central portion in the width direction of the ridge 15, the crop 16 discharged from the carrier 27 can be brought closer to the central portion of the ridge 15. ..
Further, the digging machine 4 is a digging machine 4 that is vertically connected to a traveling vehicle (tractor 2) by an elevating link mechanism 3, and has a plate surface up and down on the machine frame 17 and the front portion of the machine frame 17. The excavator 31 is formed of a plate material attached so as to face a direction, and the machine frame 17 moves forward together with the traveling vehicle 2 to dig up the crop 16 and the crop 16 excavated by the excavator 31 behind. When the carrier 27 to be conveyed upward and the excavator 4 are lifted from the working posture 105 by the elevating link mechanism 3, the crop 16 remaining in the excavator 4 falls forward from the excavator 31. It is provided with a posture adjusting mechanism 92 that automatically adjusts the posture of the excavator 4 when the elevating link mechanism 3 rises so as to be a fall restraining posture 104.

According to this configuration, the posture of the digging machine 4 is automatically adjusted by the posture adjusting mechanism 92 when the elevating link mechanism 3 is raised, so that the posture when the digging machine 4 is lifted becomes the digging machine 4. The fall restraint posture 104 is set so that the remaining crop 16 is prevented from falling forward from the excavator 31. As a result, when the excavator 4 is lifted, it is possible to prevent the crop 16 remaining in the excavator 4 from falling forward from the excavator 31.

Further, the fall restraint posture 104 is a posture in which the excavator 31 is substantially horizontal.
According to this configuration, it is possible to enhance the fall suppression function of the crop 16 when the excavator 4 is lifted.
Further, the posture adjusting mechanism 92 includes a mast 91 to which the elevating link mechanism 3 is connected, and the posture adjusting mechanism 92 has a swing piece 93 swingably supported by a pivot shaft 96 on the mast 91 and a engagement provided on the mast 91. The swing piece 93 has a matching pin 94, and the swing piece 93 engages with a top link connecting portion 101 to which the top link 11 of the elevating link mechanism 3 is connected when the swing piece 93 swings around a pivot shaft 96. The mating pin 94 has an engaging hole 98 formed so as to move from one end 98a to the other end 98b, and the engaging hole 98 is an elevating link mechanism from a state where the excavator 4 is in the working posture 105. When raising 3, the engagement pin 94 moves from one end 98a of the engagement hole 98 to the other end 98b, so that the front portion of the excavator 4 is lifted, the excavator 31 is tilted upward, and the excavator 31 is further moved up and down. As the link mechanism 3 rises, the rear portion of the excavator 4 is lifted from the front portion, and the excavator 31 is formed to have a length that makes it substantially horizontal.

According to this configuration, the posture adjusting mechanism 92 can be constructed with a simple configuration.
Further, the posture adjusting mechanism 92 is detachably attached to the swing piece 93, and when the elevating link mechanism 3 is raised from the state where the excavator 4 is in the working posture 105, the swing piece 93 swings. It has a regulation pin 102 to regulate.
According to this configuration, it is possible to secure the lifting height of the excavator 4 when moving or the like.

Further, in the fall restraint posture 104, the embankment 103 is formed by the soil on the excavator 31.
According to this configuration, it is possible to further suppress the fall of the crop 16.
Although one embodiment of the present invention has been described above, it should be considered that the embodiments disclosed this time are exemplary in all respects and are not restrictive. The scope of the present invention is shown by the scope of claims rather than the above description, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

2 Traveling vehicle (tractor)
3 Lifting link mechanism (three-point link mechanism)
4 Excavator 11 Top link 16 Crop 17 Machine frame 27 Carrier 31 Excavator 91 Mast 92 Posture adjustment mechanism 93 Swing piece 94 Engagement pin 96 Pivot shaft 98 Engagement hole 98a One end 98b End end 101 Top link connection Part 102 Restriction pin 103 Bank 104 Fall suppression posture 105 Working posture

Claims (5)

It is an excavator that is connected to a traveling vehicle so that it can be raised and lowered by a lifting link mechanism.
With the machine frame,
A moat tool that is formed of a plate material attached to the front part of the machine frame so that the plate surface faces up and down, and the machine frame moves forward together with a traveling vehicle to dig up crops.
A carrier that transports the crops excavated by the moat tool backward and upward, and
When the digging machine is lifted from the working posture by the elevating link mechanism, the digging machine is in a fall restraining posture that prevents the crops remaining in the digging machine from falling forward from the digging tool. A posture adjustment mechanism that automatically adjusts the posture of the excavator when the lift link mechanism rises,
A digging machine equipped with. The digging machine according to claim 1, wherein the fall restraining posture is a posture in which the digging tool is substantially horizontal. A mast to which the elevating link mechanism is connected is provided.
The posture adjusting mechanism has a swing piece pivotally supported on the mast by a pivot shaft, and an engagement pin provided on the mast.
The swing piece includes a top link connecting portion to which the top link of the elevating link mechanism is connected, and the engaging pin from one end to the other end when the swing piece swings around the pivot shaft. With engaging holes formed to move,
The engaging hole is excavated by moving the engaging pin from one end to the other end of the engaging hole when the elevating link mechanism is raised from the state where the excavator is in the working posture. The front part of the machine is lifted to tilt the digging tool upward, and the elevating link mechanism is raised so that the rear part of the digging machine is lifted from the front part and the digging tool becomes substantially horizontal. The digging machine according to claim 1, which is formed in a length. The posture adjusting mechanism is detachably attached to the swing piece and regulates the swing of the swing piece when the elevating link mechanism is raised from the state where the excavator is in the working posture. The digging machine according to claim 3, which has a pin. The digging machine according to any one of claims 1 to 4, wherein a bank is formed by soil on the digging tool in the fall restraint posture.

Images