JP2021158950A - Transplanter - Google Patents

Abstract

To provide a transplanter capable of lifting up/down a travel vehicle body on which a seedling planting unit is mounted with a lifting cylinder to adjust a vehicle height, preventing the travel vehicle body from dropping during downtime of work, and eliminating the necessity of vehicle height adjustment of the travel vehicle body in start of work.SOLUTION: There is provided a transplanter for lifting up/down a travel vehicle body on which a seedling planting unit is mounted by extension and shrinkage of a hydraulic cylinder for lifting to adjust a vehicle height. The transplanter comprises a vehicle height maintaining mechanism 48 for fixing a vehicle height of the travel vehicle body to any stage out of plural stages. The vehicle height maintaining mechanism 48 is actuated in stop of planting work, and the vehicle height maintaining mechanism 48 is formed of an engagement reception tool 50 of plural stage parts 50a and a protrusion rod 51 whose tip is engaged to the stage parts 50a. In work stop time, the protrusion rod 51 is engaged to the stage part 50a of the engagement reception tool 50 to maintain the vehicle height of the vehicle.SELECTED DRAWING: Figure 6

Description

The present invention relates to a transplanting machine for transplanting vegetable seedlings into a field.

For example, in the transplanting machines shown in Prior Patent Documents 1 and 2, the elevating cylinder is expanded and contracted so that the vehicle height of the traveling vehicle body can be adjusted, and the planting tool of the planting device provided on the traveling vehicle body is inserted into the field to plant seedlings in the field. Perform the work of transplanting to a predetermined depth.

When taking a long break from transplanting work or when storing it in a barn, it is common to raise the traveling vehicle body to the maximum and lift the planting tool of the planting device from the ground.

Japanese Unexamined Patent Publication No. 2016-136976 JP-A-2017-175998

However, when the transplanter is stopped, pressure due to the weight of the traveling vehicle body continues to be applied to the hydraulic oil of the elevating cylinder and the hydraulic circuit that expands and contracts the elevating cylinder, and over time, the elevating cylinder contracts due to circuit leakage of the hydraulic oil. The running vehicle may descend. As a result, the vehicle height is lowered, and the planting tool of the seedling planting device is in a state of being pressed against the ground or the floor of the warehouse, and there is a problem that the tip of the planting tool bites into the ground and soil adheres or deforms. ..

The present invention is a porting machine for adjusting the vehicle height by raising and lowering a traveling vehicle body equipped with a seedling planting device with an elevating cylinder. The purpose is to provide a transplant machine that does not require vehicle height adjustment.

The above-mentioned problem of the present invention is solved by the following technical means.

The invention of claim 1 is a transplant machine for changing and adjusting the vehicle height by raising and lowering a traveling vehicle body (40) provided with a planting device (42) by expanding and contracting the lifting hydraulic cylinder (110). The transplanting machine is characterized in that a vehicle height maintaining mechanism (48) for fixing the vehicle height in a plurality of stages is provided, and the vehicle height maintaining mechanism (48) is operated when the transplanting work is stopped.

According to the second aspect of the present invention, the vehicle height maintenance mechanism (48) is composed of an engaging receiver (50) of a plurality of step portions (50a) and a tension rod (51) whose tip engages with the step portion (50a). The transplanting machine according to claim 1, wherein the tension rod (51) is engaged with the step portion (50a) of the engaging receiver (50) to maintain the vehicle height when the work is stopped.

According to the third aspect of the present invention, a pull having a hooking tool (60) for a plurality of hooking portions (60a) and a tip hook portion (60a) for hooking the vehicle height maintaining mechanism (48) on the hooking portion (60a). It is composed of a hook (61), and when the transplanting work is stopped, the tip hook portion (60a) of the hook (61) is hooked on the hook (60a) of the hook (60) to cover the traveling vehicle body (40). The transplant machine according to claim 1, wherein the vehicle height is maintained.

The invention of claim 4 comprises a rod receiver (70) and a guide rod (71) for inserting the vehicle height maintenance mechanism (48) into the rod receiver (70), and the rod receiver (70) when the transplanting work is stopped. ), The lock pin (72) is inserted into the guide rod (71), and the guide rod (71) is fixed to the rod receiver (70) to maintain the vehicle height. It will be a transplant machine.

According to the first aspect of the present invention, when the traveling vehicle body (40) is stopped, the height of the traveling vehicle body (40) is fixed by the vehicle height maintaining mechanism (48) to prevent the lifting hydraulic cylinder (110) from shrinking. Therefore, the traveling vehicle body (40) does not descend, and even if it is left for a long time, the planting device (42) does not descend and the planting tool does not touch the ground and is damaged, and when the traveling is stopped. Since the vehicle height is maintained, it is possible to immediately start the transplantation work maintaining the planting depth before the stop without adjusting the vehicle height at the start of the work.

According to the second aspect of the present invention, when the tension rod (51) is engaged with the step portion (50a) of the engaging receiver (50), the tension rod (51) is tensioned and the lifting hydraulic cylinder (110) tries to contract. The effect of claim 1 is obtained by preventing the traveling vehicle body (40) from descending and preventing the ground height of the planting device (42) from changing.

In the invention of claim 3, the tip hook portion (60a) of the hooking tool (61) is caught by the hooking portion (60a) of the hooking tool (60) to prevent the lifting hydraulic cylinder (110) from shrinking. The effect of claim 1 is achieved by preventing the ground clearance of the planting device (42) from changing without lowering the traveling vehicle body (40).

In the invention of claim 4, when the guide rod (71) inserted into the rod receiver (70) is fixed by the lock pin (72), the traveling vehicle body (40) descends by preventing the elevating hydraulic cylinder (110) from shrinking. The effect of claim 1 is obtained by preventing the above-ground height of the planting device (42) from changing without doing so.

It is a left side view of the vegetable transplanting machine of embodiment in this invention. It is a top view of the vegetable transplanting machine of embodiment in this invention. It is a plane schematic diagram which shows typically the vehicle height adjustment mechanism of the vegetable transplanting machine of embodiment in this invention. It is a schematic side view which shows the 1st Embodiment of the Embodiment in this invention of a vehicle height maintenance mechanism. It is a schematic plan view which shows the 1st Example of the Embodiment of this invention of a vehicle height maintenance mechanism. It is a side view of the main part of the 1st Example of the Embodiment of this invention. It is a schematic side view which shows the 2nd Embodiment of the Embodiment of this invention of the vehicle height maintenance mechanism. It is a schematic plan view which shows the 2nd Example of the Embodiment of this invention of a vehicle height maintenance mechanism. It is a side view of the main part of the 2nd Example of the Embodiment of this invention. It is a side view of the main part which shows the 3rd Example of the Embodiment of this invention of a vehicle height maintenance mechanism. It is a side view of the relay guide provided in the lower part of the seedling container of the embodiment of this invention. It is a perspective view of the suppression ring of the embodiment of this invention.

Hereinafter, embodiments of the transplantation machine of the present invention will be described with reference to the drawings.

First, with reference to FIGS. 1 and 2, the overall configuration of a seedling transplanting machine for transplanting vegetable seedlings as the transplanting machine according to the embodiment of the present invention will be mainly described.

FIG. 1 is a side view showing a seedling transplanting machine 1 for transplanting, for example, onion seedlings as an example of the transplanting machine, and FIG. 2 is a plan view of the seedling transplanting machine 1.

In the following description, the side on which the steering wheel 47 is arranged is the rear side, and the opposite side, that is, the side on which the engine 41 is arranged is the front side. Then, the right-hand side is the right and the left-hand side is the left when facing the front side of the aircraft.

The seedling transplanting machine 1 of the first embodiment is provided with a traveling vehicle body 40 capable of traveling forward and a steering handle 47 for walking maneuvering at the rear of the traveling vehicle body 40, and is provided in a field in front of the steering handle 47. A planting device 42 for planting seedlings and a seedling supply device 43 for supplying seedlings to the planting device 42 are provided.

Further, a worker seat 46 on which the worker sits is provided on the front side of the traveling vehicle body 40 so that the worker can get on and supply seedlings to the seedling supply device 43.

The planting device 42 includes a first planting tool 20a and a second planting tool 20b, and is powered by the planting transmission case 26 to the first planting tool 20a via the vertical movement mechanism 21. The second planting tool 20b is configured to repeatedly move up and down.

Further, the seedling supply device 43 includes a plurality of cup-shaped seedling accommodating bodies 22 that receive the seedlings supplied by the worker from above and accommodate the seedlings inside, and are arranged in a substantially elliptical shape on the left and right in a plan view. Therefore, these plurality of seedling accommodating bodies 22 are configured to be able to move around.

As a result, the bottom of the seedling container 22 is opened at the upper position of the planting tools 20a and 20b, the seedlings inside fall into the planting tools 20a and 20b, and the fallen seedlings are planted. The attachments 20a and 20b are sequentially planted in the field.

Further, the steering handle 47 is attached to the rear end portion of the airframe frame 19 whose front end portion is fixed to the mission case 39.

Further, a pair of left and right soil covering pressure rings 37 are provided at positions near the rear left and right sides of each of the planting tools 20a and 20b.

The traveling vehicle body 40 includes an engine 41, a pair of left and right drive wheels 44 that are driven and rotated by transmitting the power of the engine 41, and a pair of left and right front wheels 45 that are rotatably supported in front of the rear wheels 44. And have.

A mission case 39 is arranged behind the engine 41. The mission case 39 has a case portion extending from the left side portion thereof to the left side portion of the engine 41, and this case portion is connected to the left side portion of the engine 41. The output shaft of the engine 41 enters this case portion, and power is transmitted to the transmission mechanism in the transmission case 39.

The front portion of the traveling transmission case 38, which is long in the front-rear direction, is rotatably attached to both the left and right sides of the mission case 39. Specifically, a substantially cylindrical traveling extension case 11 that rotates integrally with the traveling transmission case 38 is provided on the inner side of the machine body at the front portion of the traveling transmission case 38, and the traveling extension case 11 is provided. The traveling transmission case 38 is rotatably attached to both the left and right sides of the mission case 39, and the traveling transmission case 38 is rotatably attached to the left and right sides of the mission case 39. The rear wheel 44 is mounted on the rear wheel axle (also referred to as the rear end axle) 12 projecting toward the rear side of the traveling transmission case 38.

The tip of the wheel drive shaft 10 extending outward from the transmission case 39 to the left and right sides enters the position of the rotating shaft core at the front of the traveling transmission case 38, and the traveling unit system shifting transmission in the transmission case 39 The power for traveling through the section is transmitted to the transmission mechanism in the transmission case 38 for traveling. Then, the power for traveling is transmitted to the rear end axle 12 of the traveling transmission case 38 via the transmission mechanism in the traveling transmission case 38, and the rear wheels 44 are driven and rotated.

The left and right side clutches (not shown) provided in the mission case 39 can disconnect the left and right rear wheels 44. Therefore, when turning the airframe, the side clutch is used to bring the left and right rear wheels 44, which are inside the turn, into a non-driving state so that the machine can turn smoothly.

Further, the seedling transplanting machine 1 of the present embodiment is provided with a vehicle height adjusting mechanism 100 that raises and lowers the rear wheel 44 with the front side of the traveling transmission case 38 as a rotation fulcrum (see FIG. 3).

Specifically, the vehicle height adjusting mechanism 100 of the present embodiment is configured as follows. That is, an elevating arm 13 extending upward is integrally attached to the outer peripheral portion of the traveling extension case 11 which is a connecting portion of the traveling transmission case 38 to the mission case 39. Further, the pair of left and right elevating arms 13 are connected to the left and right side portions of the connecting body 120 via a connecting rod or the like. Further, the tip of the elevating cylinder rod 111 of the elevating hydraulic cylinder 110 is attached to the central portion of the connecting body 120 in the left-right width direction, and the elevating cylinder base (also referred to as a cylinder base) 112 of the elevating hydraulic cylinder 110. The front end portion 112a side of the above is fixed to the mission case 39.

In the present embodiment, as shown in FIG. 3, the right elevating arm 13 is connected to the right end portion 120R of the connecting body 120 via the connecting rod 130, and the left elevating arm 13 is , It is connected to the left end portion 120L of the connecting body 120 via a left-right horizontal control hydraulic cylinder 140 that can be expanded and contracted in response to the inclination of the machine body.

The tip of the left / right horizontal control cylinder rod 141 of the left / right horizontal control hydraulic cylinder 140 is attached to the left end 120L of the connecting body 120, and the left / right horizontal control cylinder base 142 of the left / right horizontal control hydraulic cylinder 140. The front end side of the is connected to the left elevating arm 13.

By operating the elevating operation lever 16 (see FIG. 1), when the elevating hydraulic cylinder 110 is operated and the elevating cylinder rod 111 projects to the rear of the machine body, the left and right elevating arms 13 rotate rearward. Along with this, the left and right traveling transmission cases 38 rotate downward with the wheel drive shaft 10 as the rotation shaft core, and the machine body rises. On the contrary, when the elevating cylinder rod 111 of the elevating hydraulic cylinder 110 moves forward of the machine body and retracts into the cylinder base 112, the left and right elevating arms 13 rotate forward, and accordingly, the left and right traveling transmission cases. The 38 rotates upward with the wheel drive shaft 10 as the rotation shaft core, and the airframe descends.

As a result, the operator can adjust the vehicle height of the traveling vehicle body 40 to a desired height.

Further, in the present embodiment, the hydraulic lock lever 17 (see FIG. 1) is operated in a state where the operator operates the elevating operation lever 16 (see FIG. 1) to adjust the vehicle height to a slightly raised position. A vehicle height maintenance mechanism 48 is provided to prevent the vehicle height adjusted to the above-mentioned slightly raised position from changing in the direction of lowering with the passage of time by operating and positioning the vehicle on the "fixed" side. .. The vehicle height maintenance mechanism 48 will be described later with reference to the drawings.

Further, the lifting hydraulic cylinder 110 operates based on the operation of the raising / lowering operation lever 16 by the operator, and the sensor plate 14 that touches the ridge surface and operates according to the fluctuation of the vertical distance between the machine body and the ridge surface. (See FIG. 1) also works. The operation of the sensor plate 14 is an operation of detecting the height of the upper surface of the ridge based on the position of the machine body, and based on the detection operation of the sensor plate 14, the traveling vehicle body 40 is set to the set height corresponding to the height of the upper surface of the ridge. The structure is such that the lifting hydraulic cylinder 110 operates.

Further, when the left and right horizontal control hydraulic cylinder 140 expands and contracts, the left elevating arm 13 connected to the left and right horizontal control hydraulic cylinder 140 rotates, and only the left rear wheel 44 moves up and down to move the machine body. Tilt left and right. The left-right horizontal control hydraulic cylinder 140 operates based on the detection result of a sensor that detects the left-right tilt of the machine with respect to the left-right horizontal, so that the machine is left-right horizontal on a slope.

Next, a first embodiment of the vehicle height maintaining device 48 will be described with reference to FIGS. 4 to 6.

4 is a schematic side view, FIG. 5 is a schematic plan view, and FIG. 6 is a side view of a main part.

In the first embodiment of the vehicle height maintenance mechanism 48, an engaging receiver 50 having a plurality of step portions 50a is provided on the upper part of the case of the elevating hydraulic cylinder 110, and the connecting body 120 which is a member on the tip end side of the elevating cylinder rod 111. The mounting base 52 is provided on the mounting base 52, and the tension rod 51 is pivotally attached to the rotation shaft 52a of the mounting base 52, and the tension rod 51 is rotationally urged upward by the return spring 53. A lock cable 54 connected to the hydraulic lock lever 17 is connected to the protruding side of the tension rod 51, and when the hydraulic lock lever 17 is set to the lock position, the tension rod 51 is pulled down by the lock cable 54 to pull down the tension rod 51 and the step portion 50a of the engaging receiver 50. It is designed to be locked to. The plurality of step portions 50a of the engaging receiver 50 are raised toward the front side, and the upright surface is slightly tilted toward the tension rod 51, and when engaged, the tip of the tension rod 51 is hard to come off.

The vehicle height maintaining mechanism 48 composed of the engaging receiver 50 and the tension rod 51 maintains the distance between the case of the lifting hydraulic cylinder 110 and the connecting body 120 to prevent the lifting hydraulic cylinder 110 from shrinking. , The traveling vehicle body 40 does not descend.

Next, a second embodiment of the vehicle height maintenance device 48 will be described with reference to FIGS. 7 to 9.

7 is a schematic side view, FIG. 8 is a schematic plan view, and FIG. 9 is a side view of a main part.

In the second embodiment of the vehicle height maintaining mechanism 48, a hooking tool 60 having a plurality of hooking portions 60a is provided on the body frame 19 side, and a mounting base 52 is attached to a connecting body 120 which is a member on the tip end side of the elevating cylinder rod 111. The hook 61 is pivotally attached to the rotation shaft 52a, and the hook 61 is rotationally urged upward by the return spring 53. A lock cable 54 connected to the hydraulic lock lever 17 is connected to the hooking tool 60 side of the hooking tool 61, and when the hydraulic lock lever 17 is set to the lock position, the hooking tool 61 is pulled down and the tip hook portion 61a is hooked on the hooking tool 60. It is designed to be hooked on the hooking portion 60a of the above. The tension of the hook 61 maintains the distance between the connecting body 120 and the machine frame 19 to prevent the lifting hydraulic cylinder 110 from contracting, so that the traveling vehicle body 40 does not descend.

In the third embodiment of the vehicle height maintenance mechanism 48 shown in FIG. 10, a guide rod 71 having a plurality of pin holes 71a is pivotally attached to a mounting base 52 on the mission case 39 side to which the lifting hydraulic cylinder 110 is mounted. A rod receiver 70 is pivotally attached to a connecting body 120 which is a member on the tip end side of the rod 111, a guide rod 71 is inserted through the rod receiver 70, and a lock pin 72 provided in the rod receiver 70 is provided in a pin hole 71a. I try to lock it by plugging it into.

A vehicle height maintenance mechanism 48 composed of a guide rod 71 and a rod receiver 70, which is connected to a mission case 39 to which a lifting hydraulic cylinder 110 is attached by connecting and fixing the guide rod 71 and the rod receiver 70 with a lock pin 72. The distance from the 120 is maintained to prevent the lifting hydraulic cylinder 110 from shrinking, and the traveling vehicle body 40 does not descend.

FIG. 11 shows a seedling supply device 43 for bulbous seedlings such as scallions, and a relay guide 27 that guides the falling of seedlings to the first planting tool 20a and the second planting tool 20b under the seedling container 22. Is inserted into the hole of the hopper guide 30, and the relay guide 27 is formed in a tubular shape having a smaller diameter from top to bottom. The relay guide 27 is made by winding a rubber plate into a cylinder and connecting it with a rivet 28, and inserting a slit 29 on the lower side to make it easier to open and to be easily inserted into the hopper guide 30. If the peripheral wall is to be hardened, the relay guide 27 may be double-wound to form the relay guide 27.

FIG. 12 shows a support configuration of a soil covering suppression ring 37 in a porting machine in which four planting tools are provided on the left and right sides of the planting device 42 to perform staggered planting.

Two long inner support arms 33b, 33b on the inside and one short outer support arms 33a, 33a on the left and right outside are pivotally attached to the horizontal shaft 32 horizontally laid on the left and right sides of the traveling vehicle body 40 at the lower part of the planting device 42. The inner roller mounting stays 24b, 24b at the rear and the rollers 37b, 37b, 37a, 37a paired with the outer roller mounting stays 24a, 24a are pivotally supported, and the roller mounting stays 24b, 24b, 24a, 24a are respectively supported. The same weight 35 is mounted on the. The inner support arms 33b, 33b and the outer support arms 33a, 33a are formed by bending a pipe.

The outer support arms 33a, 33a lift the rollers 37a, 37b side by the wire 36, but the inner support arms 33b, 33b can also be lifted by the interlocking pieces provided on the outer support arms 33a, 33a.

40 Traveling vehicle body 42 Planting device 48 Vehicle height maintenance mechanism 50 Engagement receiver 50a Step 51 Strut rod 60 Hook 60a Hook 61 Hook 61a Tip hook 70 Rod receiver 71 Guide rod 72 Lock pin 110 Lifting hydraulic cylinder

Claims (4)

In a porting machine that raises and lowers a traveling vehicle body (40) provided with a planting device (42) by expanding and contracting a lifting hydraulic cylinder (110) to change and adjust the vehicle height.
A transplant machine characterized in that a vehicle height maintenance mechanism (48) for fixing the vehicle height of a traveling vehicle body (40) in a plurality of stages is provided, and the vehicle height maintenance mechanism (48) is operated when the transplantation work is stopped. The vehicle height maintenance mechanism (48) is composed of an engaging receiver (50) of a plurality of step portions (50a) and a tension rod (51) whose tip engages with the step portion (50a). The transplanting machine according to claim 1, wherein (51) is engaged with a step portion (50a) of an engaging receiver (50) to maintain a vehicle height. The vehicle height maintenance mechanism (48) is composed of a hooking tool (60) of a plurality of hooking portions (60a) and a hooking tool (61) forming a tip hook portion (61a) for hooking the hooking portion (60a). Then, when the transplanting work is stopped, the tip hook portion (61a) of the hooking tool (61) is hooked on the hooking portion (60a) of the hooking tool (60) to maintain the vehicle height of the traveling vehicle body (40). The transplant machine according to claim 1. The vehicle height maintenance mechanism (48) is composed of a rod receiver (70) and a guide rod (71) to be inserted into the rod receiver (70), and a guide rod (70) inserted into the rod receiver (70) when the transplanting work is stopped. The transplant machine according to claim 1, wherein the lock pin (72) is inserted into the 71) and the guide rod (71) is fixed to the rod receiver (70) to maintain the vehicle height.

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