JPH0246255Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a rice transplanter equipped with a soil gathering device that presses and moves mud toward the side of planted seedlings as the rice transplanter moves downward.

[Conventional technology]

As a structure for vertically swinging the above-mentioned mulching tool, there is one disclosed, for example, in Japanese Utility Model Application No. 107311/1983. This involves fitting a ring member (No. 13 in the above publication) onto a rotating cam that is eccentrically fixed to the drive shaft of the planting claw, and connecting the ring member to the arm on the soil gathering tool (No. 11 in the above publication). It has a structure in which a rod (No. 14 in the above-mentioned publication) is installed.

As a result, when the rotary cam is driven to rotate with the planting operation, the rod is pushed and pulled, and the soil gathering tool is driven to swing up and down.

[The problem that the idea aims to solve]

In the above-mentioned configuration, for the rocking drive of the mulching tool,
Since a ring member and a rod that are externally fitted onto the rotating cam are required, there is room for improvement in terms of structural simplification.

When changing the pressing depth of mud by the earth mulching tool, the earth mulching tool must be connected to the drive shaft (see 1 of the above-mentioned publication).
2) Loosen the screws that are fixed to 2) and change the angle at which the mulching tool is fixed to the drive shaft. However, if the pressing depth is changed at the drive shaft, even if the fixed angle is intended to be slightly changed, the amount of change will be magnified at the tip of the mulch and the actual pressing depth will change significantly. Therefore, the pressing depth must be set by re-adjusting it many times, and the fine adjustment requires a great deal of effort.

The purpose of the present invention is to simplify the rocking drive structure of the mulching tool and to make it easier to finely adjust the pressing depth of the mulching tool.

[Means to solve the problem]

The feature of the present invention is that the above-mentioned rice transplanter is configured as follows. In other words, a soil gathering device that presses and moves the mud toward the planted seedlings as it descends is attached to a rotating spindle, and an operating member is attached to an arm provided on the rotating spindle to swing it around a different fulcrum from the rotating spindle. At the same time, a rotary cam driven in conjunction with the planting claw is brought into contact with the operating member, and a spring is provided to bias the soil gathering tool upward. The earth-harvesting tool is configured to be pushed downward by the rotary cam in conjunction with the planting operation, and returned upward by the spring upon completion of planting,
Its action and effects are as follows.

[Effect]

If configured as described above, for example, as shown in FIG. 2, the rotating cam 22 rotates while the operating member 23
By directly pushing , the mulching tool is lowered, and the spring 24 returns the mulching tool upward. In other words, the rod and ring members in the conventional structure become unnecessary.

Furthermore, when the attitude of the operating member 23 attached to the arm 19a is switched to the rotating cam 22 side as shown in FIG. It gets deeper.
Conversely, when the attitude of the operating member 23 is switched in the direction away from the rotary cam 22, the pressing depth becomes shallower.

In this case, since the aforementioned operating tool 23 is located at a position away from the rotational support shaft (corresponding to the drive shaft) of the earth gathering tool, the operating member 23 relative to the arm 19a
When the angle of is changed, the rate at which the change is expanded at the tip side of the earth mower is smaller than in the conventional structure in which the change is made at the rotating shaft portion.

[Effect of idea]

As described above, the structure can be simplified by bringing the rotating cam into direct contact with the operating member of the mulching tool. In addition, by providing the aforementioned operating member at a position away from the rotational shaft of the earth mopping tool,
Even if the attitude of this operating member is changed, the actual pressing depth of the earth mopping tool can be configured so as not to change too much, making it easier to finely adjust the pressing depth.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, a pair of left and right wheels 1, 1,
At the rear of the self-propelled aircraft having a control handle 2, etc., two seedling planting devices 3, 3 are arranged in parallel in the lateral direction of the aircraft, and a seedling stand 4 for feeding seedlings to these seedling planting devices 3 is installed. A grounding float 5 is attached to the lower part of the running machine body to constitute a walking type rice transplanter.

As shown in FIG. 2, a float support member 8, which is pivotally connected to a support bracket 6 on the rear end side of the grounding float 5 by a connecting shaft 7, can be swung up and down around a connecting shaft 10 by an operating lever 9. In addition, it is pivotally connected to the traveling body 11 by the connecting shaft 10. A plurality of notches 1 are arranged in parallel on the operation guide 12 for the operation lever 9 as shown in FIG.
3..., the float support member 8 can be fixed at the swing adjustment position by alternatively engaging the operating lever 9 and fixing it so that it does not swing. That is, by adjusting the mounting angle of the float support member 8, the mounting height of the grounding float 5 is adjusted and the planting depth is adjusted.
The connecting shaft 7 is connected to the traveling body 11 by the grounding float 5.
It is designed to swing up and down around the .

As shown in FIG. 2, a rail 14, which is a guide member for the left-right sliding of the seedling tray 4 and a receiving member for the lower end of the seedling tray mounting table, is attached to these connecting portions 14a. The seedling tray is slidably attached to the traveling body 11 via a connecting portion 14a so that the seedling tray can be moved up and down together with the seedling tray 4 by a locked swing-type operating lever 15. In the operation guide 12, which also serves as a guide for the operation lever 15, the operation lever 15 is selectively engaged with a plurality of notches 16 arranged in parallel as shown in FIG. By fixing the rail 14 to the adjustment position, the rail 14 can be fixed at the adjustment position.

That is, by adjusting the mounting positions of the rail 14 and the seedling stand 4, the amount of seedlings removed by the seedling planting device 3 in the vertical direction of the seedling stand is adjusted.

As shown in FIGS. 2 and 3, the machine is equipped with a total of four soil gathering tools 18, two of which correspond to each of the planting claws 17 of the two seedling planting devices 3, which can rotate integrally. A lateral rotational support shaft 19 is rotatably attached to the traveling body 11 so that the earth gathering tool 18 swings up and down around the axis of the rotational support shaft 19. The seedling planting device 3 is rotatably attached to the driving body 11 on the drive rotation shaft 21 of the crank arm 20, and the rotary cam 22 is integrally rotatable so as to be driven in conjunction with the planting claw 177. It is installed on.

On the other hand, the operating member 23 is connected to the arm 19a fixed to the rotation support shaft 19 by the first bolt 25 and the second bolt.
They are connected by bolts 27, and a spring 24 is attached that urges the operating member 23 to come into direct contact with the rotating cam 22.

The state shown by the solid line in FIG. 2 shows the state in which the operating member 23 is in contact with the first cam surface 22a of the rotary cam 22, and the soil gathering tool 18 is located above the field surface. From this state, when the rotating cam 22 rotates approximately 180 degrees counterclockwise in conjunction with the planting operation of the planting claw 17, the rotating cam 22 pushes the operating member 23 to the left in the drawing, and the rotating cam 22 second cam surface 22 of
b comes into contact with the operating member 23. As a result, the soil gathering tool 18 is lowered to the position shown by the two-dot chain line, the soil gathering tool 18 presses and moves the mud behind the planted seedlings toward the planted seedlings, and the planting claws 17 are used to move the planted seedlings. Backfill the muddy soil scraping hole formed at the rear of the site to prevent planted seedlings from lodging.

After that, once the planting of seedlings is completed, the planting nail 1
7 rises to the original position shown in FIG. 2, the biasing force of the spring 24 causes the earth mulcher 18 to be raised to the position shown by the solid line in FIG.

In the operating member 23, a long hole 26 is provided on the second bolt 27 side, and the operating member 23 can be fixed with respect to the arm 19a by swinging around the first bolt 25 (corresponding to a fulcrum) and changing its posture. . As a result, when the upper part of the operating member 23 is swung toward the rotating cam 22 with respect to the arm 19a and fixed, the entire swinging range of the mulching tool 18 moves downward, and the pressing depth of the mulching tool 18 becomes deeper. . Then, when the upper part of the operating member 23 is swung and fixed in the opposite manner to the above, the pressing depth of the earth mulching tool 18 becomes shallower.

Moreover, if the operating member 23 becomes worn, the first and second bolts 25, 27 can be removed and the operating member 23 can be replaced with a new one.

The present invention can also be applied to the drive structure of a soil gathering device that presses mud near the planted seedlings.

[Brief explanation of the drawing]

The drawings show an embodiment of the rice transplanter according to the present invention, in which Fig. 1 is a plan view of the walk-behind rice transplanter, Fig. 2 is a side view of the mulching tool arrangement section, and Fig. 3 is a plan view of the mulching tool arrangement section. FIG. 4 is a front view of the lever guide. 17... Planting claw, 8... Earth gathering tool, 19... Rotating shaft, 19a... Rotating shaft arm, 23...
Operation member, 24... spring, 25... fulcrum.

Claims (1)

[Scope of utility model registration request] A soil gathering tool 18 that presses and moves the mud toward the planted seedlings as it descends is attached to the rotating spindle 19, and an operating member 23 is attached to an arm 19a provided on the rotating spindle 19, which is separate from the rotating spindle 19. It is attached around the fulcrum 25 so that it can be swung and fixed in position,
A rotary cam 22 driven in conjunction with the planting claw 17 is brought into contact with the operating member 23, and the soil gathering tool 18 is brought into contact with the operating member 23.
A spring 24 is provided to bias the planting nails 1 to the upward side.
The rice transplanter is configured such that the soil gathering tool 18 is pushed downward by the rotary cam 22 in conjunction with the planting operation of step 7, and is returned upward by the spring 24 when planting is completed.