JP2573908B2 - Walking operation type self-propelled excavator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digging machine for digging and harvesting various root crops, bulbs and the like from the ground, and more particularly to a walking operation type self-propelled digging machine in which a worker operates while walking. .

[0002]

2. Description of the Related Art Conventionally, various root vegetables, bulbs, and the like have been cultivated as edible or ornamental crops. In all of these bulb vegetables, nutrients are stored in roots, stems, leaves, and the like existing in the ground, and the nutrients grow in a spherical or massive form. Therefore, the spherical or massive portion is dug up from the ground and harvested for use in eating or ornamental use. At that time, when the cultivation area is large, etc., a digging machine suitable for the harvest is adopted in consideration of the reduction of the labor burden and the improvement of the digging efficiency. As such a digging machine, a digging machine generally provided with a traveling device, and a digging device provided with a crop digging conveyor connected behind a digging blade is used. Moreover, there are two types of digging machines, which are driven by a tractor and perform digging work while driving and receiving driving force, and those which are self-propelled.

[0003]

However, since all such excavators are ride-on type excavators in which an operator operates while riding on the excavator, the excavator is towed by a tractor. Of course, even the self-propelled type has a problem in that the whole becomes large. This is because the large ones are expensive, the handling and storage burdens are large, and if the cultivation area is small, small turns cannot be made, so the excavation efficiency does not increase.

The present invention has been made in view of such conventional problems, and an object of the present invention is to provide a walking operation type self-propelled excavator having a small size and excellent excavating ability.

[0005]

In order to achieve the above object, a walking operation type self-propelled excavator 10 according to the present invention is equipped with an engine, a traveling device 14 at a lower portion, and an operation handle 16 at a rear upper portion. On the front part of the equipped vehicle body 12,
The rear part 30 of the digging device 18 provided with the crop digging conveyer 26 connected to the rear of the digging device 18 is installed, and the crop falling from the rear end of the digging device 18 is received on the center of the vehicle body 12. The traversing device 20 including the traversing conveyor 74 is installed. In the center of the digging device 18, a front bending portion 32 that bends the front portion 28 of the digging device 18 with respect to the rear portion 30 so as to be extendable is provided, and the digging device 18 is provided on both sides of the front portion 28. A support ring 64 for supporting is installed, and a hand-held portion 72 for bending or extending the digging device 18 is provided on the front portion 28 when the digging device 18 is bent or extended.

Further, as the folding mechanism 32, the excavating device 18
Is divided into a front side and a rear side, respectively.
A part of the corresponding left and right front side plate 34a and a part of the rear side plate 34b are overlapped respectively, and a shaft 36 serving as a center of rotation of the front part 28 is provided at each of these overlapped portions, and The side plate 34a and the rear side plate 34b are connected to each other, and at least one of the front side plate 34a and the rear side plate 34
b, an arm post 38 for rotatably supporting the front positioning arm plate 40 via a shaft 44 provided at the base end portion 40 thereof is protruded, and the front positioning arm plate 40 has both ends 42, 4.
8 at least one positioning hole 4
6 and 50, and the positioning holes 46 and 50 thereof are further connected to each other by providing a slide hole 52 so that the corresponding rear side plate 34b is provided.
Alternatively, it is preferable to protrude the arm support 56 provided with the positioning projections 58 that fit into the positioning holes 46 and 50 of the front positioning arm plate 40 and the slide holes 52 on the front side plate 34a.

Further, bowl-shaped discs 68 for collecting and collecting crops are arranged in front of each other near the left and right front ends of the digging device 18 so that the distance between the front and rear discs of the bowl-shaped discs 68 is increased. It is advisable to narrow the gap on the side and install it slightly above the digging blade 22.

[0008]

When the driving force is transmitted to the traveling device 14 by using the engine as a power source, the digging machine 10 runs by itself. This driving force is also transmitted to the crop digging conveyor 26 and the crop traverse conveyor 74. At the time of excavation, the operator walks while operating with the handle 16 and advances the excavator 10 along the ridge. Then, the cutting edge of the digging blade 22 enters the ground, and digs up the crop with the soil. The excavated crop and soil ride on the front end of the digging conveyor 26, are sent backward while being shaken by the soil, fall from the rear end of the digging device 18 onto the traversing conveyor 74 of the traversing device 20, Further, it is traversed while being shaken by the soil, and falls on the ground or in a container.

When the excavator 10 reaches the end of the ridge, the excavator 10 holds the hand-held portion 72 and uses the center folding mechanism 32 to move the excavator 18.
The front part 28 is bent with respect to the rear part 30 so that the front part 28
Above the ground. Then, the digging blade 22 and the support wheel 6
Since 4 etc. go up high, the excavator 10 can be smoothly rotated and moved to the next ridge. After the movement, the user again holds the hand-held portion 72, extends the front portion 28 of the digging device 18 so as to be substantially straight with respect to the rear portion 30, and starts digging work. If the center bending mechanism 32 is provided at the center of the excavating device 18, the front portion can be raised at the time of handling such as simple movement of the excavator 10 or at the time of storage.

When the excavator 18 is bent, the front positioning arm plate 40 is first rotated about the shaft 44 at the base end 42 and fitted into the extension positioning hole 50 near the distal end 48 thereof. Remove the positioning projection 58 that has been used. And
When the front portion 28 of the digging device 18 is rotated about the left and right shafts 36 while holding the hand-held portion 72, the positioning projection 58 relatively moves inside the slide hole 52, and the folding protrusion near the base end portion 42 is formed. It fits inside the curved positioning hole 46. Then, the front part 28 of the digging device 18 can be held in a state of being bent with respect to the rear part 30. Even when the digging device 18 is extended, the front positioning arm plate 40 is rotated to remove the positioning projection 58 fitted in the bent positioning hole 46 near the base end 42. When the front portion 28 of the digging device 18 is rotated in the opposite direction with the hand-held portion 72, the positioning projection 5
8 moves in the slide hole 52 relatively in the opposite direction and fits inside the extension positioning hole 50 near the distal end portion 48. Then, the front part 28 of the digging device 18 is
Can be held in a substantially straightened state.

When the digging blade 22 digs up the crop together with the soil, the two discs 68 disposed opposite to each other act as a barrier against leakage of the crop to the left and right sides (ball leakage). Since both discs 68 are bowl-shaped, and the interval between the front ends is widened and the interval between the rear ends is narrowed, the discs 68 are fed to the front end of the crop digging conveyor 26 so as to embrace the crop. I can put it in. In addition, since both disks 68 are set slightly above the excavating blade 22, the excavated soil can easily escape to the left and right rear.

[0012]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a perspective view of a walking operation type self-propelled excavator to which the present invention is applied when the excavating device is extended, FIG. 2 is a plan view showing the structure of the excavating device in detail, and FIG. 3 is a right side view. . In the drawing, 10 is a walking operation type self-propelled excavator having a substantially symmetrical structure on the left and right, 12 is its vehicle body, 14 is a crawler belt type traveling device provided at a lower portion of the vehicle body 12, and 16 is provided at an upper rear portion of the vehicle body 12. An operation handle 18 is a digging device installed on a front portion of the vehicle body 12, and a traverse device 20 is installed on a central portion of the vehicle body 12. An engine (not shown) serving as a power source of the excavator 10 is mounted below and in the vicinity of the traversing device 20 installed at the center of the vehicle body 12. The digging device 18 has a digging blade 22 at the front end, a fork 24 interposed behind the digging blade 22, and a link rod chain conveyor as a conveyer 26 for digging up crops. The digging device 18 has a middle folding mechanism 32 that bends and extends the front half 28 of the digging device 18 with respect to the rear half 30 manually. The portion of the excavator 18 installed on the vehicle body 12 is the rear half 30.

As the folding mechanism 32, the left and right side plates 34 (34a, 34b) of the excavating device 18 are respectively connected to the front side 34a.
1, 34b1 and the rear side 34a2, 34b2
The left and right corresponding front side plates 34a1 and 34b1 and a part of the rear side plates 34a2 and 34b2 are respectively overlapped, and the shaft 36 (36a, 36b) which is the center of rotation of the front portion 28 is attached to both overlapping portions. Excavation equipment 18 provided for each
The front part 28 and the rear part 30 are connected. An arm post 38 projects upward from a position near the rear of the right front side plate 34b1, and the base end 42 of the front positioning arm plate 40 is attached to the distal end of the arm post 38.
Are connected via a shaft 44, which is the center of rotation of.

The front positioning arm plate 40 has one bent positioning hole 46 near its base end 42 and a slightly extended positioning hole 50 near its distal end 48.
(50a, 50b) are provided at two locations, respectively, and further provided with a slide hole 52 for connecting the positioning holes 46, 50, and a bar-shaped hand-held member 54 that is bent in an arc toward the rear and protrudes upward at the upper portion. Is installed. Also, an arm post 56 is provided to project upward from the center position of the corresponding right rear side plate 34b2, and the distal end of the arm post 56 is provided with the positioning holes 46 and 50 of the front positioning arm plate 40 and the slide holes 52. A positioning projection 58 to be fitted is provided. In addition,
Each of the positioning holes 46 and 50 is a hole provided so as to be recessed upward in a direction perpendicular to the longitudinal direction of the slide hole 52.

The excavating device 18 has a support wheel 64 comprising a tire 60 and an L-shaped member 62 having a shaft for rotatably supporting the tire 60 on both sides near the front end of the front portion 28.
(64a, 64b). In addition, these two support wheels 64 have both ends of a bar-shaped reinforcing member 66 which is bent in an arc shape and protrudes upward connecting the left and right front side plates 34a1, b1 of the front portion 28 in order to enable adjustment of the digging depth. Around each part, it is mounted to be able to move up and down by bolting etc. The reinforcing member 66 can be held by hand and used at the time of bending or extending the front portion 28 and the like.

Further, bowl-shaped discs 68 (68a, 68a,
68b) are placed in opposition and both disks 68
Are installed at a distance L, for example, 20 to 50 mm above the excavating blade 22. In addition, these discs 68 are L-shaped members 70 (70a, 7
0b), and are mounted near the front ends of the left and right front side plates 34a1 and b1 so as to be able to move forward and backward by tightening bolts or the like. Each of the L-shaped members 70 is provided with a rod-shaped hand-held member 72 (72a, 72b) which is mainly used at the time of bending work or extension work of the front part 28 and which protrudes upward. In this way, when the folding mechanism 32 is configured to be manually operated, the excavator 10 can be downsized as compared with the case where power such as hydraulic pressure or electromagnetic force is used.

The traversing device 20 also has a link rod chain conveyor or the like as a conveyor 74 for receiving and traversing the crop falling from the rear end of the digging device 18. Then, a container table 76 is mounted below the right end side of the traverse device 20. The container table 76 is detachable from the vehicle body 12.

When digging potatoes, konjac, carrots, and other bulbous vegetables using such a walking operation type self-propelled excavator 10, the worker first digs at the end of a ridge where digging starts. The taker 10 is placed. Therefore, the excavator 18
Is in the bent state as shown in FIG.
The front positioning arm plate 40 is slightly rotated upward about a shaft 44 at the base end 42 thereof, and the bent positioning hole 46 of the arm plate 40 is rotated.
The positioning projection 58 of the arm column 56 is removed from the arm post 56. Then, since the positioning projection 58 descends to the front end of the slide hole 52 of the arm plate 40, the hand holding member 72 and the reinforcing member 66 at the left and right front ends of the digging device 18 are appropriately held, and the front part 2 is moved.
8 is rotated about a shaft 36 at the rear end thereof so that the rear
It is lowered below zero and its front part 28 is stretched so as to be straight with respect to the rear part 30. At this time, the positioning projection 58 moves inside the slide hole 52 toward the rear end, and the arm plate 4
0 fits into the front positioning hole 50a in the front end portion 48. Then, the front portion 28 of the digging device 18 can be held in a substantially straight inclined state with respect to the rear portion 30. The digging depth is shallow at the position of the front positioning hole 50a and becomes deep at the position of the rear positioning hole 50b. Therefore, when digging deeply, the positioning member 58 is raised by lifting the hand-held member 54 again as shown in FIG. As shown in FIG.
To fit.

Then, when the driving force is transmitted from the engine to the walking device 14, the excavator 10 starts self-propelled. This driving force is also transmitted to the crop digging conveyor 26 and the crop traverse conveyor 74. The operator walks while operating with the handle 16 and advances the excavator 10 along the ridge. Then, the cutting edge of the digging blade 22 enters the ground, and digs up the crop with the soil. By the way, the front part 28 of the digging device 18
Even if the positioning projections 58 do not fit into the front extension positioning holes 50a during the extension operation for lowering the height, when the digging is started, the projections 58 fit into the holes 50a.

The digging depth can also be changed by adjusting the mounting position of the digging depth adjusting support ring 64 with respect to the reinforcing member 66. When the digging blade 22 digs up the crop together with the soil, the two discs 6 arranged opposite to each other
8 serves as a barrier to the leakage of crops (ball leakage) to the left and right sides. Both discs 68 have a bowl-like shape that is gradually depressed from the periphery toward the center, and are arranged in a C-shape by widening the interval on the front end side and narrowing the interval on the rear end side. Then, the harvested product is digged up and sent to the front end of the conveyor 26. In addition, since both disks 68 are set slightly above the excavating blade 22, the excavated soil can easily escape to the left and right rear. The excavated crop and soil ride on the front end of the excavating conveyor 26, are lifted backward while being shaken by the soil, are sent to the rear end, and fall from the rear end of the excavating device 18 onto the conveyor 74 of the traversing device 20,
The soil is further sifted and fed to the right, and the container table 7
6 falls into a container (not shown) placed on top.
Incidentally, when the container table 76 is not mounted, the container table 76 falls on the ground.

When the excavator 10 reaches the end of the ridge, when the excavating device 18 is bent, the hand-held member 54 is lifted, and the front positioning arm plate 40 rotates to fit into the elongated positioning hole 50. The positioning protrusions 58 come off. Then, when the hand-held member 72 or the like is lifted, the front portion 28 of the digging device 18 rotates, and the positioning protrusion 58 moves inside the slide hole 52 and fits into the bent positioning hole 46. Then
The front part 28 of the digging device 18 can be held in a bent state with respect to the rear part 30, and the digging blade 22 and the digging depth adjusting support wheel 64 rise up. Therefore, the excavator 10 can be smoothly rotated to move to the next ridge, and a small turn can be obtained. After moving,
The user again holds the hand-held member 72 and the like, extends the front portion 28 of the digging device 18 so as to be substantially straight with respect to the rear portion 30, and starts digging work. If the center bending mechanism 32 is provided at the center of the digging device 18, the front part 28 can be raised even when the digging machine 10 is handled or stored, for example, when the digging machine 10 is simply moved.

In the above embodiment, an arm post 38 is provided on the right front side plate 34b1 of the digging device 18, and positioning holes 46 and 50 and a slide hole 52 are formed in the arm post 38.
A front positioning arm plate 40 provided with a support is connected via a shaft 44, and an arm support 56 provided with a positioning projection 58 is provided on a corresponding right rear side plate 34b2. Arm plate etc. on the left side plate 34a
It may be installed in. Alternatively, an arm support for supporting the front positioning arm plate by a shaft may be provided on the rear side plate 34b, and another arm support may be provided on the front side plate 34a.

[0023]

According to the present invention described above, claim 1
The excavator is a walking operation type self-propelled machine, and the center of the excavator is provided with a center bending mechanism that bends the front part of the excavator to the rear and makes it extensible. A hand-held part for bending or extending the excavating device is provided by holding it by hand when bending or extending the device, so no power is required for bending and extending the excavating device. The taker can be downsized. In addition, when the edge of the ridge is reached during excavation, the middle folding mechanism is manually operated to bend the front of the excavator to raise the excavation blades and support wheels, etc., and rotate the excavator smoothly. Since it can be moved to the next ridge, small turns can be made and digging efficiency can be improved. In addition, since the front part of the excavator can naturally be raised at the time of handling or storage such as simple movement of the excavator, handling and storage become easy.

According to the second aspect of the present invention, when the excavator is switched from the extended state to the bent state, if the front positioning arm plate is lifted and rotated, the positioning projection fitted in the elongated positioning hole is released. When the user grips the hand-held part and lifts and rotates the front part, the positioning protrusion moves in the slide hole and fits into the bent positioning hole, so it is easily switched manually, and the front part of the digging device is moved to the rear part. In this state, it can be held in a folded state. Also, when the excavator is switched from the extended state to the bent state, if the positioning arm plate is lifted and rotated, the positioning projections fitted in the bent positioning holes come off. If you hold your hand and lower the front part and rotate it, the positioning protrusion moves in the slide and fits into the extension positioning hole, so it is also easy to switch manually again, and the front part of the digging device is almost straight with respect to the rear part And it can be satisfactorily held. Therefore, bending work and extension work of the excavator can be performed smoothly and easy to handle,
Since the excavation depth can be kept constant, the excavation efficiency is improved.

According to a third aspect of the present invention, both of the dicks, which prevent the excavated crop from leaking to the left and right sides, are bowl-shaped, and the gap between the front ends is widened, and the gap between the rear ends is narrowed so that they are opposed to each other. Because of the arrangement, the crop can be embraced to prevent leakage of the ball, and sent to the front end of the harvested container. In addition, since both disks are set slightly above the excavating blade, the excavated soil can easily escape to the left and right sides, and the amount of soil brought in can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a walking operation type self-propelled excavator to which the present invention is applied when an excavating device is extended.

FIG. 2 is a plan view showing the structure of the excavating device in detail.

FIG. 3 is a right side view showing the structure of the excavating device in detail.

FIG. 4 is a right side view corresponding to FIG. 3 when the excavating device is bent.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Walking operation type self-propelled excavator 12 ... Body 14 ... Traveling device 16 ... Operation handle 18 ... Digging device 20 ... Lateral feeding device 22 ... Digging blade 24 ... Fork 26 ... Digging conveyor 28 ... Front part 30 ... Rear 32: Center bending mechanism 34: Side plates 36, 44 ... Shaft 38, 56: Arm support 40: Front positioning arm plate 2: Base end 46: Bending positioning hole
48: Tip 50: Extension positioning hole 52: Slide hole 54, 72: Hand-held member 58: Positioning protrusion 60
... Tires 62, 70 ... L-shaped member 64 ... Excavation depth adjustment support wheel 66 ... Reinforcement member 68 ... Disk 74 ... Transverse conveyor 76 ... Container table

Claims (3)

(57) [Claims] 1. A vehicle equipped with an engine, a traveling device at a lower portion, and an operation handle at an upper rear portion.
The rear part of the digging device equipped with a crop digging conveyor is installed behind the digging blade, and the crop is placed on the center of the vehicle body to receive the crop falling from the rear end of the digging device. In a walking operation type self-propelled excavator in which a traverse device provided with a feed conveyor is installed, a front part of the excavating device is bent at a central portion of the excavating device with respect to a rear portion thereof so as to be extendable. A mechanism is provided, supporting rings for supporting the excavating device are installed on both sides of the front part, and the excavating device is folded or extended by holding it by hand at the time of bending or extending the excavating device. A walking operation type self-propelled excavator characterized by providing a hand-held place for performing work. 2. As a center folding mechanism, the left and right side plates of the excavator are divided into a front side and a rear side, respectively, and the left and right corresponding front and rear side plates are partially overlapped with each other. The front side plate and the rear side plate of the digging device are connected to each other with an axis serving as the center of rotation of the front portion at both overlapping portions, and an arm support is projected on at least one of the front side plate and the rear side plate. At least one positioning hole is provided on each of the arm posts near both ends, and the positioning holes are further provided with slide holes to connect the base end of the front positioning arm plate to the rotation of the arm plate. An arm post having a positioning projection which fits into a positioning hole or a slide hole of a front positioning arm plate is provided on a corresponding rear side plate or front side plate via a central shaft. Walking operation according to item 1 Type self-propelled excavator. 3. A bowl-shaped disk for harvesting and picking is disposed in front of the excavating device in the vicinity of the left and right front ends, respectively, and the two disks are widened at the front end side and at the rear end side. 3. The self-propelled digging machine according to claim 1, wherein the digging blade is narrowed and installed slightly above the digging blade.