JPH0444015Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention uses the ground pressure of a ground sensor that is biased in the direction of ground contact by a biasing mechanism to determine the vertical position of a seedling planting device attached to a traveling machine. In addition to providing a lifting control means that maintains a constant level based on the vertical movement caused by fluctuations, the mechanism acts on the mud surface and increases the biasing force of the biasing mechanism as the mud surface becomes harder, corresponding to the hardness of the mud surface. The present invention relates to a rice transplanter that is provided with a mechanism that varies the biasing force of a biasing mechanism, and is provided with a soil-clamping arm that performs a soil-clamping action on the planted seedlings after the planting claw is operated.

[Conventional technology]

Conventionally, in the above-mentioned rice transplanting machine, the soil-harvesting arm always operated in a state where the planting claw was operated (Japanese Utility Model Publication No. 30324/1983).

[Problem that the invention attempts to solve]

Therefore, the mulch arm performs mulch action regardless of whether the mud surface is hard or soft.On the contrary, when the mud surface is soft, the mulch arm splashes highly fluid mud onto the planted seedlings. There was a problem in that the seedlings were pushed down, and the original function of the mulching arm, which was provided to secure the planting posture of the seedlings by mulching the roots of the seedlings, was causing the opposite result.

The purpose of the present invention is to provide an earth-harvesting arm mechanism that effectively utilizes the mud hardness detection piece of the existing mechanism to suppress negative effects on planted seedlings.

[Means for solving problems]

A characteristic configuration of the present invention is that a mechanism is provided that prevents the action of the shoring arm on the mud surface when the biasing force of the biasing mechanism becomes smaller due to the displacement operation of the variable mechanism, Its effects are as follows.

[Effect]

In other words, when the biasing force of the biasing mechanism is small,
In other words, if the mud surface is soft, the operation of the mulching arm is prevented to prevent mud from splashing onto the planted seedlings (if the mud surface is soft, the mud itself has fluidity). (The holes caused by the planting claws will naturally fill in and the planted seedlings will not fall over.) At the same time, when the urging force is large,
That is, when the mud surface is hard, the earth mooring arm can be applied to the mud surface, soil can be gathered into the holes formed by the planting claws, and the roots of the planted seedlings can be hardened with the soil.

[Effect of idea]

As a result, it is possible to control the operation of the shoring arm to suit the mud surface condition, suppressing the effect on planted seedlings, and making use of changes in the biasing force of the biasing mechanism, thereby improving the mud surface hardness. There is no need to provide a detection mechanism.

〔Example〕

As shown in FIG. 5, propulsion wheels 4, 4 are pivotally supported via wheel cases 3, 3 on both sides of a transmission case 2, which is disposed at the front of the fuselage together with the engine 1, so as to be able to swing vertically. A transmission case 5 that also serves as the fuselage frame extends from the transmission case 2, and a seedling planting device 9 equipped with a seedling planting mechanism 6, a seedling stand 7, and left and right side floats 34 is installed at the rear end of the transmission case 5. A walking rice transplanter is constructed.

Next, the elevating and lowering control means 10 for maintaining a constant elevating attitude of the seedling planting device 9 relative to the ground will be described in detail. As shown in FIG. 1, a float 8, which also serves as a ground sensor and is provided at the center of the front end of the fuselage, is pivoted so as to be able to swing up and down around a fulcrum, and the wheel case 3 is connected to the transmission case 2 from a pivot point. An arm 11 is erected, and the erected arm 11 is interlocked and connected via a connecting rod 12 to a support arm 14 connected to a lifting cylinder 13 piston for driving the wheel case 3 up and down. The installed actuation rod 15 is interlocked and connected to the lifting cylinder control valve 17 via the bell crank 16, and the grounding float 8
By vertically swinging the wheel case 3 in the opposite direction based on the vertical swing of the seedling planting device 9, an elevation control means 10 is configured to maintain a constant elevation attitude of the seedling planting device 9 relative to the ground. The bell crank 16 is provided with a biasing mechanism 18 that exerts a force to press the grounding fluid 8 against the mud surface.
is provided, and one end of a spring constituting the biasing mechanism 18 is linked to the hand-side manual adjustment lever 19 via a wire 20, thereby forming a variable biasing force mechanism 21.

Next, the structure of the shoring arm 22 will be described in detail. Crankshaft 2 extending from the transmission case 5
A planting arm 25 with a planting claw 24 fixed at the tip of 3.
By pivotably supporting the planting arm 25 so as to be relatively rotatable, and pivoting one end of the planting arm 25 to the swing link 26 so as to be relatively rotatable, the planting claw 24 can be connected to the seedling take-out opening of the seedling platform 7. It is configured to circulate between 7A and the planting surface G. On the other hand, the earth gathering tool 22 is installed in a planting case 27 provided over the width of the left and right fuselage.
A pair of planting nails 24 provided as many as the number of planting rows are fixed to a swinging shaft 28 installed between 27 so as to be positioned on each side, and the swinging shaft 28 is connected to a swinging shaft 28 via a link mechanism 29. It is connected to the tip of the crankshaft 23, and is integrated with the planting arm 25 in synchronization with the timing, and performs a soiling action from both sides of the seedlings after planting. A pawl clutch mechanism 30 is provided at one end of the swing shaft 28. As shown in FIG. 1, this pawl clutch mechanism 30 includes a fixed clutch piece 30A that is loosely fitted on the swing shaft 28, and a movable clutch piece that is fitted around the swing shaft 28 with a spline and is movable on the swing shaft axis. 30B, and a fixed clutch piece 30A.
The link mechanism 2 linked to the crankshaft 23
9, and by linking the movable clutch piece 30B with the manual adjustment lever 19 on the proximal side, input operation is performed by adjusting the lever 19. That is, as shown in the figure, the manual adjustment lever 19 and the movable clutch piece 30B
A manual adjustment lever 1 is connected to a wire mechanism 31 that connects the
A movable clutch 32 is provided with a long hole accommodation mechanism 32a that engages with a movable clutch 32 to disengage the pawl clutch mechanism 30 only when the manual adjustment lever 19 is set to a position corresponding to a soft mud surface. Piece 30
Operate B.

In the above, the clutch mechanism 30 is referred to as a mechanism that prevents the operation of the shoring arm 22 on soft mud surfaces.

[Another example]

○B As a device for inputting the clutch mechanism 30, this clutch mechanism 30 is connected to the manual adjustment lever 1.
Instead of having a manual control configuration in conjunction with 9, an automatic control configuration may be used.
That is, as shown in FIG. 3, a mud hardness detection piece 33 that acts on the mud surface is provided, and when the mud hardness detection piece 33 swings downward corresponding to the soft mud surface, the clutch mechanism 30 is activated. A configuration may be adopted in which the power is maintained in the off state.

B The above embodiment may be applied to a riding rice transplanter.

[Brief explanation of the drawing]

The drawings show an embodiment of the rice transplanter according to the present invention, FIG. 1 is a configuration diagram showing a mechanism for blocking the action of the mulching arm, and FIG. 2 is a plan view showing the state of attachment of the mulching arm and the planting part. FIG. 3 is a configuration diagram showing a mechanism for blocking the action of the mulching arm, FIG. 4 is a side view showing the operating state of the mulching arm, and FIG. 5 is an overall side view. 8... Ground sensor, 9... Seedling planting device, 10...
...Elevation control means, 18...Biasing mechanism, 21...Variable mechanism, 22...Matching arm, 24...Planting claw, 30...Preventing mechanism.

Claims (1)

[Scope of utility model registration request] Elevating and lowering that maintains the vertical position of the seedling planting device 9 attached to the traveling machine constant relative to the ground based on the vertical movement of the ground sensor 8 that is biased in the ground direction by the biasing mechanism 18 as the ground pressure fluctuates. A mechanism that includes a control means 10 and varies the biasing force of the biasing mechanism 18 so as to act on the mud surface and increase the biasing force of the biasing mechanism 18 as the mud surface becomes harder in accordance with the hardness of the mud surface. 21
, and after the planting operation of the planting claw 24, a mulching arm 2 performs a mulching action on the planted seedlings.
2, the rice transplanter is equipped with a mechanism 30 that prevents the action of the mulching arm 22 on the mud surface when the biasing force of the biasing mechanism 18 becomes smaller due to the displacement operation of the variable mechanism 21; A rice transplanter equipped with