JPS642324B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a rice transplanter, in particular, a rice transplanter, in particular, a rice transplanter, in which wheels are mounted on a machine body equipped with a float and a seedling transplanting device via a wheel support case that is swingable in the vertical direction, and
The present invention relates to a rice transplanter in which the support case is interlocked and connected to a piston member of a piston device, and the support case is swung under drive control by a control valve of the piston device to move the wheels up and down with respect to the machine body. A first detection mechanism that detects the distance between the float and the aircraft body, and a second detection mechanism that detects the amount of downward movement of the wheel with respect to the aircraft body are provided, and the output member of the second detection mechanism is connected to the control valve. A lever of the aircraft control section is operatively connected to the output member of the first detection mechanism, and this output member is operatively connected to the output member of the second detection mechanism via an elastic body. , a wheel protrusion constant device that can make turning work on ridges etc. easier by keeping the amount of wheels protruding constant from the aircraft body when operating the lever of the control section, and also regulating the amount of protrusions of the wheels. To provide a rice transplanter which can be operated without being forced by a position sensing signal from a float.

That is, an elastic body is provided between a first detection mechanism that detects the distance between the float and the aircraft body and a second detection mechanism that detects the amount of downward movement of the wheel with respect to the aircraft body, so that when the lever is operated, the first detection mechanism Although the control valve is driven through the operating section, the elastic body allows the control valve to be driven regardless of the second detection mechanism;
The amount of wheel protrusion can always be kept constant relative to the aircraft body, and the first and second detection mechanisms can be driven separately via elastic bodies, and are forced by the position sensing signal from the float. The present invention is characterized in that it is possible to operate the wheel extension constant device without being affected.

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a side view of the whole machine, and 1 is a fuselage body, which includes a prime mover 2, a transmission case 3, a main body casing 5 having two planting claws 4, and an upper part of the casing 5. A seedling planting device 9 comprising a seedling mounting stand 8 supported via guide members 6 and 7 is provided. Furthermore, a float 12 serving as a leveling member is provided at the lower part of the body 1 via a planting depth adjustment link 10 and a buffer member 11.
, a wheel support case 1 that can swing vertically
The wheel 14 is mounted on the shaft via 3. The wheels 14 are interlocked and connected to the prime mover 2, and the machine body 1 is driven by the prime mover 2 driving the wheels 14, and the planting claws 4 of the prime mover 2 and the seedling planting device 9
The planting claws 4 are driven by the prime mover 2 to grab the seedlings on the seedling stand 8 and plant the roots of the seedlings into the soil.

Reference numeral 15 denotes a control section of the machine body 1 connected to the rear of the seedling planting device 9, and the control section 15 includes a control handle 16, a travel lever 17 extending from the storage case 20, and a planting control lever. 18 and a speed change lever 19 are provided, and the planting operation lever 18 is guided by a U-shaped guide groove (not shown) provided in the storage case 20.

Further, as shown in FIGS. 2 and 3, the wheel support case 13 is interlocked and connected to a piston device 21 installed in the body 1, so that the piston device 21
The wheel support case 13 is driven by a control valve 35 to swing the wheel support case 13, and the wheel 14 is moved up and down with respect to the body 1. That is, the piston device 21 includes a piston member 22 that reciprocates toward the rear of the fuselage 1, and a spring receiving plate 23 and a spring 26 are interposed in the piston member 22, and the spring receiving plate 23 and lock plate 24 are extended. The holding member 25 is supported via a support shaft 29 on a guide rod 27 whose one end is fixed to the piston device 21.
The middle part of the swing plate 28 is swingably supported at the lower part of the swing plate 28 via a fulcrum shaft (not shown), and the swing plate 28 is connected to the base ends of the wheel support cases 13, 13 at both ends of the swing plate 28. Arm 3
1 and 31 are connected via swing rods 30 and 30, and the piston member 22 is moved forward and backward to adjust the left and right wheels 14 and 14 at the same time. Further, the swing plate 28 is provided with a lock pin 3 for regulating the swinging of the swing plate 28.
The lock pin 34 is attached to a lever (not shown) provided in the grip of the control section 15 of the fuselage 1 by a wire 33.
At the same time, the swing plate 28 and the lock plate 24 are engaged and fixed via the lock pin 34 so that the lock pin 34 can be freely engaged and detached from the regulation hole 32 provided in the lock plate 24, so that the left and right The wheels 14, 14 can be supported at approximately the same height, and during rice transplanting work, the lock pin 34 can be removed from the lock plate 24, and a control system installed in the pressure oil supply circuit of the piston device 21 can be used. By controlling the drive of the valve 35, the wheel support cases 13, 13
And the swing plate 28 is swung, and the left and right wheels 14, 14 are moved vertically relative to the machine body 1 according to the unevenness, such as during rice planting near a ridge or when there are unevenness on the tiller in the field. At the same time, the body 1 is supported substantially horizontally.

Further, 36 is a first detection mechanism that detects the distance between the float 12 and the body 1, and the first detection mechanism 36 swings the output member 38 on a support shaft 37 that is provided on one side of the piston device 21. The upper end of the lifting rod 39 is connected to the output member 38 through the elongated hole 40, while the rod 39
A bracket 43 whose lower end is connected to the bearing sleeve 42 via a shock absorbing spring 41 and which is integrally connected to the bearing sleeve 42 is fixed to the float 12, and when the float 12 is raised and lowered by the expansion and contraction of the buffer member 11. , the distance between the float 12 and the aircraft body 1 is detected.

Further, 44 is a second detection mechanism for detecting the amount of downward movement of the wheel 14 with respect to the body 1, and the second detection mechanism 44 has an engagement groove 45 in the spring receiving plate 23 interposed in the piston member 22. An output member 46 having a diameter is slidably attached to the engagement groove 45 via a locking spring 47, and a locking/disengaging tool 48 is provided. 1
8 via the wire 71, and the output member 46 is moved in accordance with the advance of the piston member 22 by the engagement of the engaging/disengaging tool 48 with the output member 46, thereby moving the wheel 14 downward with respect to the body 1. The amount of movement is detected.

Further, the output member 46 of the second detection mechanism 44 is interlocked and connected to the operating section 49 of the control valve 35 via a connecting arm 50, while the output member 38 of the first detection mechanism 36 is connected to the lever of the aircraft control section 15. 18 are interlockingly connected to each other via the float pressing spring 51 and the swing rod 52, and the output member 38 of the first detecting mechanism 36 is interlockingly connected to the output member 46 of the second detecting mechanism 44 via the elastic body 53. be.

That is, the operating portion 49 of the control valve 35 connects a swinging arm 55, which is elastically connected to the output member 38 of the first detection mechanism 36 by an elastic body 53 made of a coil spring, to one side of the piston device 21. It is swingably supported on a support shaft 37 provided, and a coupling arm 56 and a switching arm 57 are attached to the swing arm 55.
The output member 46 of the second detection mechanism 44 is provided with a long hole 59, and a spring 54 is interposed between the output member 46 and the output member 46. One end of the connecting arm 50 is slidably locked in the hole 59, and the other end of the connecting arm 50 is locked in the operating section 49.
The output member 38 of the first detection mechanism 36 and the second detection mechanism 4
The output member 46 of No. 4 is interlocked and connected via the elastic body 53.

The present invention is constructed as described above, and the seedling mounting stand 8
The seedlings are loaded onto the ridge, and the prime mover 2 drives the wheels 14 and the planting claws 4 of the seedling planting device 9 to make the machine body 1 travel and plant the seedlings, and at the ridge, the machine body 1 turns around and travels. When the machine body 1 is traveling back, the planting operation lever 18 is moved from the planting position at one upper end of the U-shaped guide groove to the amount of wheel protrusion at the bottom of the U-shaped guide groove. When operated to a certain position, the drive of the seedling planting device 9 is stopped via a drive member (not shown) connected to the lever 18, while the locking/disengaging device 48 connected to the lever 18 is stopped via a wire 71. At the same time, the float pressing spring 51 is loosened and the swing rod 52 is pulled, and along with this operation, the output member 46 of the first detection mechanism 36 is moved in the direction of the arrow, and with this movement, the operating section 49 such as the swing arm 55 moves to the left via the elastic body 53 connected to the output member 38 of the first detection mechanism 36, and the control valve 35 in the direction of raising the aircraft,
In this case, the connecting arm 50 connected to the output member 46 of the second detection mechanism 44 is connected to the long hole 59 of the output member 46.
The connecting arm 5 is moved inside against the spring 54.
When the end of the control valve 35 comes into contact with the end surface of the elongated hole 59, the movement of the operating section 49 to the left is stopped, and the drive of the control valve 35 in the direction of raising the aircraft body is restricted. 2. Output member 46 of detection mechanism 44
The operating section 49 can be moved regardless of the situation.

Then, as the control valve 35 is driven in the body raising direction, the piston member 22 of the piston device 21
is advanced, and the wheels 14 are lowered via the support member 25 and swing plate 28 that are linked to the piston member 22, and the float 1 is moved in conjunction with the fuselage 1.
2 can be raised by a certain amount.

That is, as the piston member 22 advances,
The second detection mechanism 44 detects the amount of downward movement of the wheel 14 with respect to the body 1, and the output member 46 of the second detection mechanism 44 is in a state of being locked with the locking/unloading tool 48, so The output member 46 of the second detection mechanism 44 moves to the right in conjunction with the piston member 22, and along with this movement, the output member 46 of the second detection mechanism 44 pulls the connecting arm 50 and also pulls the connecting arm 50. The control valve 35 is returned to the neutral position from the aircraft raised position by pulling the operating portion 49 to the right through the control valve 35, and by returning the control valve 35 to the neutral position, the piston member 22 stops advancing. As a result, the amount of downward protrusion of the wheels 14 can be regulated to a certain amount necessary for turn-around travel.
In this case, since the amount of movement of the wheels 14 with respect to the machine body 1 is sensed by the second detection mechanism 44, the position of the wheels 14 with respect to the machine body 1, that is, changes in the unevenness of the tiller, etc. Even if the interval changes, a constant amount of movement can be obtained from that position, that is, the engagement position between the output member 46 and the locking/disengaging tool 48, so the amount of movement of the wheels 14 can be kept constant according to changes in the field. It is possible.

Furthermore, when the control valve 35 is returned from the aircraft raised position to the neutral position, the operating section 49 is pulled by the output member 46 of the second detection mechanism 44 via the connecting arm 50; The elastic body 53 interposed between the swing arm 55 of 49 and the output member 38 of the first detection mechanism 36 allows the float 12 to move to the right, and the first detection mechanism 44 adjusts the distance between the float 12 and the body 1. It is detected and held.

Further, when the lever 18 is operated to the planting position of the U-shaped guide groove after the machine body 1 is turned back and the planting operation is performed, the seedling planting device is activated via the drive member connected to the lever 18. 9 is driven, while the lever 18 is connected to the wire 7.
1, the second detection member 44 is retracted from the engagement groove 45 of the output member 46, the float pressing spring 51 is pulled, and the swing rod 52 is pushed. The output member 38 of the first detection mechanism 36 is moved in the direction opposite to the arrow, and along with this movement, the operating section 49 connected to the output member 38 is moved to the right via the elastic body 53 to control the The valve 35 is driven from the neutral position in the direction of lowering the fuselage, and along with this driving, the piston member 2
2 is moved backward, the wheels 14 are raised, and the float 12 is lowered in conjunction with the fuselage 1. In this case, as the piston member 22 retreats, the output member 46 of the second detection mechanism 44 is in contact with the connecting arm 50 and the operating section 49, but the engaging/disengaging tool 48 engages the output member 46. Since the spring receiving plate 23 and the output member 46 are retracted from the groove 45 and are movable in conjunction with the piston member 22, the piston member 22 can freely retreat and move. Further, the wheels 14 are raised via the swing plate 28, etc., and when the float 12 touches the field, the rod 3
9, the first detection mechanism 36 senses the output member 38 and raises the output member 38, and along with this rise, the operation part 49
is moved to the left via the elastic body 53 to return the control valve 35 from the body lowered position to the neutral position, thereby stopping the retraction of the piston member 22.

Also, when driving on the road, lever 1
8 to the on-road driving position at the other upper end of the U-shaped guide groove, the drive of the seedling planting device 9 is stopped via the drive member connected to the lever 18, while the second detection mechanism 44 of the locking/disengaging tool 48 is released from the output member 46, the pressure spring 51 is loosened, the swing rod 52 is pulled, and the output member 38 of the first detection mechanism 36 moves in the direction of the arrow. The control valve 35 is driven in the direction of raising the aircraft body through the elastic body 53 connected to the output member 38 and each arm 50 of the operating section 49. Since the output member 46 and the locking/disengaging tool 48 are separated from each other,
The piston member 22 protrudes to the terminal end in the advancing direction, and when located at the terminal end, the piston member 22 touches the support member 2.
5, the piston device 21 is stopped by the guide member 27, and the refueling of the piston device 21 is unloaded, and the downward amount of the wheel 14 is not restricted. 28, etc., and the fuselage 1 and floats are completely pulled up.

As shown in FIG. 2, the engaging groove 45 provided in the locking/disengaging tool 48 and the output member 46 of the second detection mechanism 44 is formed with a vertical surface on the rear side and a downwardly inclined slope on the front side. It is preferable to do so. By forming in this way, it is possible to facilitate locking when the locking/disengaging tool 48 and the engaging groove 45 are engaged, and also to ensure the locking.

In addition, when the locking/disengaging tool 48 is formed into a tapered shape as described above, the piston device 2
This makes it possible to prevent damage to the locking/disengaging tool 48 due to leakage from the piston device 21 when the piston device 21 stops operating, without increasing the strength.

That is, during the above-mentioned return travel, the locking/disengaging tool 48 is locked in the engagement groove 45 of the output member 46, moves forward in conjunction with the piston member 22 as the piston member 22 moves forward, and moves by a certain amount. The control valve 35 is returned to the neutral position via the output member 46 and the operation part 49, and the oil supply to the piston device 21 is stopped, but when this is stopped, the piston member 22 is forced to move backward due to leakage from the piston device 21. However, since the locking and disengaging tool 48 is still locked in the engagement groove 45,
It would be better to increase the strength of the output member 46 and the locking/disengaging tool 48 as there is a risk of damage due to the backward action being applied to the locking/disengaging tool 48. If the locking/disengaging tool 48 is formed into a tapered shape or other shape that makes it easy to separate from the engagement groove 45 as described above, the piston device 21 of the piston member 22 may
Even if there is a backward effect due to leakage from
The locking/disengaging tool 48 moves back through the engagement groove 45 of the output member 46 unevenly due to the spring 47, which does not lead to breakage, and there is no need to increase the strength, so it can be manufactured at low cost.

As described above, the present invention includes a first detection mechanism that detects the distance between the float and the aircraft body, and a second detection mechanism that detects the amount of downward movement of the wheel with respect to the aircraft body, and the output member of the second detection mechanism. is interlocked and connected to the operation part of the control valve of the piston device,
The output member of the first detection mechanism is operatively connected to the lever of the aircraft control section, and this output member is operatively connected to the output member of the second detection mechanism via an elastic body, so that when the lever is operated, the first The detection mechanism allows the control valve to be driven via the operating section,
In this case, due to the elastic body, regardless of the second detection mechanism,
Although the control valve can be driven and the piston member is driven to move forward by driving the control valve, the second detection mechanism works via the elastic body, and the amount of wheel protrusion can be regulated to a constant level.

In addition, since the first detection mechanism and the second detection mechanism are driven separately via the elastic body, the second detection mechanism of the wheel extension constant device is not forced by the position sensing signal from the float. This enabled the machine to be activated, provide accurate wheel extension, and allow the aircraft to turn around and perform travel operations in a position that was extremely easy.

Furthermore, even if the distance between the wheels and the machine body fluctuates due to unevenness of the tiller, etc., the amount of wheel protrusion can be determined from that position, making turning work easier regardless of field conditions. .

[Brief explanation of drawings]

FIG. 1 is an overall side view showing an embodiment of the present invention, FIG. 2 is an enlarged side view of essential parts, and FIG. 3 is a plan view of the same. 1... Body, 9... Seedling planting device, 12... Float, 13... Wheel support case, 14... Wheel, 1
5... Aircraft control unit, 18... Lever, 21... Piston device, 22... Piston member, 35... Control valve, 36... First detection mechanism, 38... Output member, 44... Second detection mechanism, 46...output member,
49...Operation unit, 53...Elastic body.

Claims (1)

[Claims] 1 Wheels are mounted on a body equipped with a float and a seedling planting device via a wheel support case that can swing vertically, and this support case is interlocked and connected to a piston member of a piston device, and this piston A rice transplanter configured to swing the support case under drive control by a control valve of the device to move the wheels up and down relative to the machine body, a first detection mechanism that detects a distance between the float and the machine body;
a second detection mechanism for detecting the amount of downward movement of the wheel relative to the aircraft body; an output member of the second detection mechanism is operatively connected to an operating section of the control valve; and an output member of the first detection mechanism; A rice transplanter characterized in that a lever of a body control section is interlocked with the lever, and the output member is interlocked with the output member of the second detection mechanism via an elastic body.