JPH08289655A - Elevating mechanism for bed of vegetable harvester - Google Patents

Abstract

PURPOSE: To easily bring down accommodating vessels loaded on the bed of a vegetable harvester. CONSTITUTION: This elevating mechanism for the bed F of a vegetable harvester is constituted by arranging a crawler traveling device 3 at the lower direction of front, rear, left and right parts of a main frame 1 for constituting the crawler traveling device as rockable, also pivoting the front end of the bed F at the rear end of the main frame for constituting the bed so as to be capable of tilting downward to the rear direction, and arranging the pivoting shaft of the bed F more front position than that of the rear end of a cutting device. Also, it is constructed by protruding a driving case 49 from the both sides of a rear differential case downward to the rear direction and a rear chain case 50 from the driving case 49 horizontally to the rear direction, placing a dumping cylinder 51 in a space S formed by the driving case with the rear chain case 50 and an elevation operating lever for the dumping cylinder 51 at the one side of the bed F of an operator cab seat side, installing a stopper locking the shrinking movement of the dumping cylinder 51 at the side of a piston rod 51b, and arranging a handle for the stopper in the vicinity of the elevation operating lever.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting mechanism for a loading platform on which vegetables such as radish and carrot are dug up, transported to the rear, unnecessary leaves or roots are cut, and a container to be stored after selection is placed.

[0002]

2. Description of the Related Art Conventionally, a root vegetable harvesting machine for radish and the like has been publicly known, and a digging machine is arranged at the front of the machine so that root vegetables can be dug up from the bottom of the soil and the rear of the root can be raised upward and rearward. The pulling conveyor is arranged at an angle to, the root portion of the root conveyor is sandwiched by the belt of the pulling conveyor from both sides to convey the root vegetable diagonally upward, and a cutting device is arranged at the rear of this conveying section to remove the root vegetable. A technique is known in which a root portion of a leaf is cut, unnecessary leaf portions are discharged from a rear end of a transport device to a field, and a root portion to be harvested is stored in a storage container placed on a bed.
For example, the technique disclosed in Japanese Patent Laid-Open No. 6-165616 is known.

[0003]

However, in the conventional vegetable harvesting machine, since the loading platform is fixed, the container containing the harvested vegetables must be manually lowered, and Since the loading platform travels across the ridges, the vehicle height is high, so the work of lowering the container full of vegetables was a heavy labor task. Further, although a crawler type traveling device is adopted as the traveling device, it may become unstable when one crawler rides on a convex portion of the field, which may be dangerous for unloading work. In addition, in order to raise and lower the loading platform, it is necessary to arrange a hydraulic cylinder at the bottom of the loading platform.However, in order to travel across the ridges, if the hydraulic cylinder is placed in the center, the hydraulic cylinder will be placed in the field scene. It could be scratched and hurt.

[0004]

The present invention uses the following means in order to solve the above problems. That is, the driver's seat is arranged on one side on the main frame, and the digging device, the pulling conveyor, and the cutting device are arranged on the other side so that vegetables can be harvested. A crawler traveling device is arranged so that the crawler traveling devices can be respectively swung around the axial center in the left-right direction, and the front end of the loading platform is pivotally supported at the rear end of the main frame, and the loading platform is tilted rearward and downward. Configured possible.

Further, the pivot shaft provided at the front end of the cargo bed is arranged in front of the rear end of the cutting device, and in the rear crawler traveling device, the drive case is projected rearward and downward from both sides of the rear differential case, and the drive case is provided. The rear chain case is projected further rearward in the horizontal direction, the dump cylinders are arranged in the spaces formed by the left and right drive cases and the rear chain case, and one end of each dump cylinder is pivotally supported by the drive case and the other end. Is mounted on the lower surface of the loading platform, the elevating operation lever of the dump cylinder is arranged on one side of the loading platform on the driver's seat side, and a stopper for locking the reduction operation of the dump cylinder is pivotally supported on the pivotal support portion of the piston rod to stop the stopper. The lock is configured to be released by the rotation of the stopper, and the handle of the stopper is arranged in the vicinity of the lifting operation lever.

[0006]

By using the above-mentioned means, the front, rear, left and right crawler traveling devices travel while swinging in accordance with the unevenness of the field, and the sway of the machine body is reduced. Also, when lowering the loading platform, from the side of the driver's seat, grasp the stopper handle with your left hand, rotate the stopper upward to unlock it, and operate the lifting operation lever with your right hand. When the dump cylinder is reduced, the loading platform tilts backward and the storage container can be slid down. Further, the dump cylinder is arranged in the space formed by the drive case and the rear chain case, and has a compact structure. Further, the loading platform is pivoted around the front end so as to be rearwardly lowered, and at this time, the crawler device swings up and down according to the unevenness in the field to reduce the change in the head.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the configuration of the present invention will be described with reference to the accompanying drawings. FIG. 1 is an overall side view of the self-propelled vegetable harvester of the present invention, FIG. 2 is a plan view of the same, FIG. 3 is a front view of the same, FIG. 4 is a side view of a loading platform elevating section, and FIG. 5 is a plan view of the same. Is a side view of the cylinder stopper, FIG. 7 is a plan view of the same, and FIG.
Is also a rear view, FIG. 9 is a side view with the cylinder stopper released, and FIG. 10 is a side view with the dump cylinder contracted.

The overall structure of a self-propelled vegetable harvester for digging radish as vegetables will be described with reference to FIGS. The operation portion G is disposed on the front right side of the main frame 1 in the traveling direction,
The operation section G has an operation column 4 provided upright at the front end, and a steering handle 5, a work clutch lever, a speed change lever and the like are provided on the upper portion of the operation column 4 so as to project therefrom. An engine compartment 6 is arranged behind the operation column 4, an engine is built in the engine compartment 6, and a driver's seat 7 is arranged on the engine compartment 6.

From the left front side (opposite side to the operating section G) of the main frame 1 to the rear side, a series of vegetable harvesting devices for digging and transporting the radish, cutting off the leaf portion and accommodating are arranged. Has been done. First, a digging device A for digging up radish in the soil from the left front part of the main frame 1, and a pulling conveyer for nipping and conveying the leaf part of the digged radish from the rear part of the digging device A. B, a placing conveyor D below the rear end portion thereof, and a leaf cutting device C on the side of the placing conveyor D. Main frame 1
Provided on the rear part is a cargo bed F of the present invention, which can be moved up and down, which will be described later, on which a container 17 is mounted as a storage container,
From the loading conveyor D, the radish falls rearward and downward and the container 1
It is configured to be stored in 7.

Each of the above-mentioned various devices for harvesting vegetables will be specifically described. In the digging device A, the rear end of the lower link 13 is pivotally supported at the front end of the main frame 1, and the support arm 15 is erected at the front end of the main frame 1, and the support arm 15 is placed on top. Link 16
The rear end is pivoted. The front end portion of the top link 16 and the front end portions of the lower links 13, 13 are pivotally supported by the mounting body 12, and the crank arm 10 is mounted on the front end portion of the mounting body 12.
A hoe-shaped excavating claw 9 having a substantially L-shape when viewed from the front is arranged through the crank arm 10 driven by a hydraulic motor M1 fixed to the side surface of the mounting body 12 to rotate an eccentric cam. The excavation claws 9 are swung by the crank movement to dig up the root portion in the soil. Further, a mounting portion for the gauge wheel 11 that determines the height of the dug claw 9 is provided on the front side surface of the mounting body 12.

The pull-out conveyor B is provided so as to be inclined rearward and upward, and the pull-out conveyor B is formed in a V shape in plan view, and conveys the front portion in parallel with the traveling direction and the rear portion obliquely outward. I am trying. The pull-out conveyor B has pulleys at the front and rear ends and bending portions of the transfer frames 21L and 21R, and the holding belts 25L and 25R are wound around these pulleys so that they can be transferred backward by rotational driving.
Further, a raising device 30 is provided at the front end of the pulling conveyor B, and the leaf portion of the radish is weeded by the weeding plate 30a, and the tines 30b, 30b ... Pull up the laid lobes. A scraping belt 32 having a protruding tine is arranged at the rear part thereof to scrape the leaf portion between the sandwiching belts 25L and 25R.

A conveyor lifting cylinder 29 is interposed between the side surface of the transport frame 21L and the side surface of the lower link 13. When the conveyor lifting cylinder 29 is not expanded or contracted, a hydraulic pressure described later is used. As the cylinder 19 expands and contracts, the digging device A and the pulling conveyor B are moved up and down at the same time, and the conveyor lifting cylinder 29 is independently driven to match the height of the ridge surface, the root of the radish, the height of the leaves, and the like. Only the pull-out conveyor B can be individually moved up and down. An arm 14 is fixed to the rear end of the lower link 13, and a hydraulic cylinder 19 is interposed between the tip of the arm 14 and the main frame 1, and the lower cylinder 13 is expanded and contracted. The digging claw 9 and the extraction conveyor B can be moved up and down by rotating 13.

The rear portion of the pull-out conveyor B is supported by a transmission shaft 22 and a support arm 23, and the transmission shaft 22 and the support arm 23 are pivotally supported by a rotary shaft 24, which is supported by the main frame 1. It is laid horizontally on a support frame 20 erected on the midway portion. The rotation shaft 24 serves as a rotation fulcrum when the pulling conveyor B is moved up and down. Further, a placement conveyor D is disposed in the front-rear direction below the pull-out conveyor B, and a front portion of the placement conveyor D is positioned rearward of a bent portion of the pull-up conveyor B so that the pull-out conveyor B can be used. When conveying in a diagonal direction, the root portion of the radish is placed on the placement conveyor D in the left-right direction and is sent to the rear. A seat 26 on which an auxiliary worker sits is arranged on the side of the loading conveyor D.

The loading conveyor D winds a wide conveyor belt 36 in a triangular shape in a side view, and a projection 36a having the same width as the conveyor belt 36 at regular intervals on the conveyor belt 36.
36a ... is projected outward, the front part of the placing conveyor D is approximately aligned with the inclination of the pulling conveyor B, and the rear part is horizontal, and the radish is placed between the protrusions 36a and 36a and inherited. A horizontal worker at the rear portion sorts them by an auxiliary worker and conveys them to the rear.

An auxiliary conveyor 34 is arranged in parallel to the left side of the horizontal conveyor of the placing conveyor D. The auxiliary conveyor 34 is provided on the conveyor chain with tines 34a.
.. is provided so that the leaves of the radish are placed between the tines 34a and the tine 34a, and the cutting device C is provided in the rear portion between the horizontal conveying portion of the placing conveyor D and the auxiliary conveyor 34. The shooter 40 can be opened to the left on this side.
Is provided.

In such a structure, when harvesting work is performed, the excavating device A is positioned in accordance with the cultivation line, the depth of the excavating claw 9 is adjusted by the gauge wheel 11, and the lifting cylinder 29 is moved. By expanding and contracting, adjusting the height of the raising device 30 located at the tip of the pulling conveyor B, and performing the harvesting work while moving forward, the radish is lifted by the rocking of the excavating claw 9 and the raising device 30 The radish leaves are brought closer to the center by the scraping belt 32, the leaf portions are held by the holding belts 25L and 25R, and are pulled out while being conveyed backward.

Then, the root portion of the radish is inclined from the vicinity of the bent portion in the middle of the pulling conveyor B, and the root portion is placed on the conveyor belt 36 of the placing conveyor D while being conveyed rearward,
The leaves enter between the protrusions 36a and the protrusions 36a, are released from the pull-out conveyor B and fall onto the placement conveyor D, and the excess leaves are cut by the cutting device C while the radish is fed backward in the horizontal state. This unnecessary leaf is shooter 4
It is guided by 0 and falls on the ridge. The root part is dropped from the rear end of the placement conveyor D and stored in the storage container.

Next, the structure of the traveling unit is such that the front crawler traveling devices 2L and 2R and the rear crawler traveling devices 3L and 3R are provided below the horizontally arranged main frame 1.
The front crawler traveling devices 2L and 2R are provided with
Can be steered by the steering operation by the steering handle 5 arranged in the upper operation portion G. Then, the front crawler traveling devices 2L and 2R from the engine in the engine room 6 are passed through the transmission case and the front differential case 46.
Is driven.

The rear crawler traveling devices 3L and 3R are shown in FIG.
As shown in FIG. 4 and FIG. 5, the drive cases 49, 49 are fixed to the rear differential case 47 supported by the rear portion of the main frame 1 so as to be inclined rearward and downward.
9. A rear chain case 50/50 is provided to project rearward from the rear end in the horizontal direction, and a rear crawler traveling device 3L is provided from the rear end of the rear chain case 50/50 via a drive sprocket.
・ Drives 3R. By arranging the drive case 49 and the rear chain case 50 in a V-shape when viewed from the side, a space S can be formed between the drive case 49 and the rear chain case 50 and the minimum ground clearance can be increased.

Further, a dump cylinder 51 for raising and lowering the loading platform F of the present invention is disposed in the space S. That is, the dump cylinder 51 is not provided in the center in the left-right direction, but is arranged in a pair on the left and right to raise the ground clearance so that the dump cylinder 51 does not hit even when traveling across the ridge in the center. Explaining one of the dump cylinders 51, the dump cylinder 51
The base portion 51a of the dump cylinder 51 is pivotally supported on the rear portion of the drive case 49, and the piston rod 51b of the dump cylinder 51 is supported.
The tip is pivotally supported by a support stay 52 provided in the middle of the cargo bed F.

The front end of the cargo bed F is pivotally supported by a pin 53 on the rear end of the main frame 1 to serve as a pivot point, and the control box 54 of the dump cylinder 51 is arranged at one front side of the cargo bed F, that is, on the lower side of the driver's seat. Then, by rotating the raising / lowering operation lever 55 protruding from the control box 54, the control valve in the control box 54 is switched so that the dump cylinder 51 can be expanded and contracted. Therefore, due to the expansion and contraction of the dump cylinder 51, the loading platform F is vertically rotated about the pin 53, and the position of this rotation center is located in front of the rear end of the cutting device C as shown in FIG. Thus, the overall length of the machine body can be shortened, and the container 17 can be placed as frontward as possible to improve the weight balance between the front and rear.

A stopper 56 is pivotally supported on the support stay 52 together with the piston rod 51b.
As shown in FIGS. 6, 7, and 8, the stopper 56 has a structure in which a pair of plates 56a and 56a are arranged in parallel, and space plates 56c and 56c are arranged between the plates 56a and 56a. Then, set the space between the two, space plate 56c
The lower surface 56g of 56c rests on the piston rod 51b. Pivot bosses 56b, 56b are provided at the rear ends of the plate members 56a, 56a, are pivotally supported by the support stay 52, and a U-shaped restricting rod 56d is provided on the front part of the dump cylinder 51. It is placed in contact with the upper part, and pad plates 56e and 56e are provided at the front ends of the plate members 56a and 56a, and when the dump cylinder 51 is contracted, the rear surface of the cylinder hits and is locked so that it cannot be further lowered (reduced). I am able to do it.

Mounting plates 56f are provided on the side surfaces of the plate members 56a, 56a so as to project from the left and right stoppers 56a.
A connecting rod 57 is connected between the 56 mounting plates 56f and 56f as shown in FIG. A U-shaped grip 59 is provided on the side surface (driver's side) of the plate 56a of the right stopper 56 so as to project laterally, and the mounting position thereof is arranged in the vicinity of the operation lever 55. ing.

In such a construction, the container 17 is placed on the loading platform F to store the harvested radish.
When a lot of radish is stored in this container 17, it is necessary to unload it, place an empty container 17 on it, and receive the harvested radish, but the work of manually unloading the container 17 full of this radish is difficult. Since it requires heavy labor, the loading platform F is lowered so that it can be slid down. That is, the loading platform F
First, the operator is positioned on the right side of the machine body where the control box 54 is located, grasps the grip 59 with the left hand, and rotates the stopper 56 upward as shown in FIG. unlock. At this time, since the left and right stoppers 56, 56 are connected by the connecting rod 57, they are simultaneously lifted, and the dump cylinders 51, 5 are
The abutting state of 1 and the stoppers 56, 56 is released, and the dump cylinders 51, 51 can be reduced.

In this state, when the operating lever 55 is rotated downward with the right hand, the piston rod 51a of the dump cylinder 51 is contracted, and the stopper 56 is mounted on the cylinder. In this state, the handle 5
9 may be released, and as shown in FIG. 10, as the dump cylinder 51 is contracted, the stopper 56 rides up. Due to the reduction of the dump cylinder 51, the cargo bed F is rotated downward, so that the container 17 placed on the cargo bed F can be easily slid down, and the container 17 can be easily lowered onto the ground surface by hand.
Then, when the container 17 is returned to its original position after being lowered, the dump cylinder 51 is extended by rotating the operation lever 55 to the upward side, and the stopper 56 is naturally locked by its own weight at the extended position. Rotate to
The dump cylinder 51 is prevented from naturally contracting. In this embodiment, the container 1 is placed on the loading platform F.
7 is placed, but it is also possible to receive vegetables by a net, store them in a bag, or put them separately on the loading platform F.
It is possible to make the vegetables on the loading platform F slide down by the reduction of 1.

[0026]

Since the present invention is constructed as described above,
It has the following effects. That is, the four crawler traveling devices are swingably arranged as in claim 1,
Since the front end of the loading platform can be tilted downward to the rear end of the main frame, it is possible to unload the load placed on the loading platform while sliding it, and even women and women can easily unload it. I am able to reduce it. Also, even if the surface of the field has irregularities, the four crawlers can swing according to the irregularities of the ground surface,
The tilt is as small as possible, and stable work is possible even when unloading the load by tilting the loading platform backwards, the shock at that time is small, and the load can be dropped without damaging the vegetables. .

Since the pivot shaft provided at the front end of the loading platform is arranged in front of the rear end of the cutting device as in claim 2, it is possible to place the storage container in the front and place it, and shorten the entire length of the machine body. The center of gravity is not biased to the rear even when fully loaded, and the weight balance of the entire machine can be improved. On the other hand, since the sorting unit is located in front of the cutting device, if the cutting tool is arranged too close to the front for work, the worker will be in a dangerous state. Therefore, it is preferable that the cutting device be located as rearward as possible.
Therefore, by arranging the pivotal support portion of the loading platform forward of the rear end of the cutting device, an efficient layout is achieved.

Since the dump cylinders are arranged in the space formed by the left and right drive cases and the rear chain case, the space can be used effectively.
It can be compactly arranged, and the inclination angle of the loading platform can be made large. Also, because dump cylinders are arranged on both sides, it can be brought close to the inner surface of the crawler, and the ground clearance when straddling the ridge can be increased,
The drive case can also protect the dump cylinder.

According to the fourth aspect, since the lifting lever of the dump cylinder and the handle of the stopper are arranged close to one side of the loading platform on the driver's side, both operations can be performed at the same time, so that the loading platform can be tilted. You can tilt it while visually recognizing it.

[Brief description of drawings]

FIG. 1 is an overall side view of a self-propelled vegetable harvester of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a front view of the same.

FIG. 4 is a side view of the platform ascending / descending unit.

FIG. 5 is a plan view of the same.

FIG. 6 is a side view of a cylinder stopper.

FIG. 7 is a plan view of the same.

FIG. 8 is a rear view of the same.

FIG. 9 is a side view showing a state where a cylinder stopper is released.

FIG. 10 is a side view of the dump cylinder in a contracted state.

[Explanation of symbols]

 A digging device B pulling conveyor C cutting device F loading platform S space 1 main frame 2 front crawler traveling device 3 rear crawler traveling device 7 driver's seat 47 rear differential case 49 drive case 50 rear chain case 51 dump cylinder 55 operating lever 56 stopper 59 Handle

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yukihiro Fukuda 428 Enami, Okayama City, Seiray Industrial Co., Ltd. (72) Inventor Nobuyuki Irie 428 Enami, Okayama City, Seirei Industrial Co., Ltd.

Claims (4)

[Claims] 1. A driver's seat is arranged on one side of the main frame, and a digging device, a pulling conveyor, and a cutting device are arranged on the other side so as to harvest vegetables. A crawler traveling device is arranged below the left and right, and the crawler traveling device is configured to be swingable around an axis in the left-right direction, and a front end of the loading platform is pivotally supported at a rear end of the main frame to rear the loading platform. A loading platform elevating mechanism for a vegetable harvester, which is configured so that it can be tilted downward. 2. A loading platform elevating mechanism for a vegetable harvesting machine, wherein a pivot shaft provided at a front end of the loading platform according to claim 1 is arranged in front of a rear end of the cutting device. 3. The rear crawler traveling device according to claim 1, wherein the drive case projects rearward and downward from both sides of the rear differential case, and the rear chain case projects horizontally rearward from the drive case. A dump truck lifting mechanism for a vegetable harvester, characterized in that a dump cylinder is arranged in a space formed by a chain case, one end of each dump cylinder is pivotally supported by a drive case, and the other end is pivotally supported by a lower surface of the cargo bed. . 4. The lifting / lowering operation lever of the dump cylinder according to claim 3 is arranged on one side of the loading platform on the driver's seat side, and a stopper for locking the reduction operation of the dump cylinder is pivotally supported on the pivotal support portion of the piston rod, A loading platform lifting mechanism for a vegetable harvesting machine, wherein the lock is configured to be unlocked by rotating the stopper, and a handle of the stopper is arranged in the vicinity of a lifting operation lever.