JPH029605Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an operating device for facilitating operation at the edge of a rice field during rice transplanting using a rice transplanter.

[Conventional technology]

Generally, rice transplanting work using a rice transplanter is carried out by lowering the seedling transplanting device so that it touches the ground on the field and moving it forward.This rice transplanting work progresses to the edge of the ridge, and the front part of the rice transplanter hits the edge of the ridge. Raise the seedling transplanting device, move the rice transplanter to the rear end a little, and then move it forward, making a 180° turn. Then, with the seedling transplanting device lowered, move forward along the previously planted seedlings. Since the operation is carried out in the order in which the rice transplanter is run, when the rice transplanting work has progressed to the edge of the bank, it is necessary to raise the seedling transplanter and move it backwards.In this case, the conventional rice transplanter In this case, since the raising operation and the backward movement operation of the seedling planting device are not linked to each other, there is a risk that the seedling planting device will be operated backward before being raised at the edge of the harbour, and the seedling planting device may be operated backward when it is lowered. When the machine started traveling backwards, not only would the float of the seedling planting device crush the seedlings that had been planted, but the float would also pierce into the field, causing damage.

Therefore, Japanese Utility Model Application Publication No. 57-107309 as a prior art discloses that when the traveling speed change lever in the traveling transmission mechanism and the elevating/lowering lever in the seedling planting device are rotated to the backward traveling position, It is proposed to solve the above-mentioned problem by interlocking the lever so that the lever rotates the seedling planting device to a position to raise it.

[The problem that the idea aims to solve]

However, in this prior art, the travel gear shift lever and the lift lever are always linked and linked; in other words, the travel gear shift lever and the lift lever always remain in the interlocked state. This makes operation at the edge of the river more convenient, but on the other hand, when the rice transplanter is stored indoors or mounted on a truck, the seedling transplanter automatically raises when the rice transplanter is moved backwards. Since the height of the rice transplanter is increased, there is a problem that there is a danger that the rice transplanter may overturn when the rice transplanter is stored or loaded onto a truck.

The present invention aims to provide an operating device that solves the problems of the prior art.

[Means to solve the problem]

In order to achieve this object, the present invention includes an elevating mechanism for raising and lowering the seedling planting device with respect to the field, and a traveling transmission mechanism including a backward traveling position, and a manual rotation operation type traveling transmission mechanism in the traveling transmission mechanism. A speed change lever and a manually rotatable lift lever for switching and operating the lift mechanism of the seedling planting device are arranged such that when the traveling speed change lever is rotated to the backward traveling position, the lift lever is moved to the position of the seedling planting device. In a rice transplanter which is connected in an interlocking manner so as to be rotated to a raised position, the traveling speed change lever is configured to be switchable between an interlocking position in which the travel speed change lever is interlocked with the lifting lever and a non-linking position in which it is not connected in an interlocking manner with the lifting lever. In addition, the traveling speed change lever is provided with a spring means for biasing the travel speed change lever to the non-interlocking position.

[Effect]

In such a configuration, when the operator grips the travel gear shift lever and rotates the travel gear shift lever to the reverse travel position with the travel gear lever in the interlocking position with respect to the lift lever against the spring means, Since the lift lever is then rotated to the raised position of the seedling transplanting device, the seedling planting device is automatically raised significantly when the rice transplanter is traveling backwards.

Then, when the operator releases his/her hand from the traveling gear shift lever, the traveling gear lever is automatically disengaged from the lift lever by the spring means, and is brought into a non-interlocking state. This makes it possible to operate the lift lever and the lift lever separately and independently.

〔Example〕

Hereinafter, the embodiment of the present invention will be explained with reference to a drawing in which it is applied to a riding rice transplanter. In the drawing, reference numeral 1 indicates a running vehicle body, and the running vehicle body 1 includes a vehicle body frame 2 and a front part of the vehicle body frame 2. A pair of left and right front wheels 3 attached to the lower surface, and the vehicle body frame 2
It consists of a pair of left and right rear wheels 5 attached to the lower rear surface via a chain case 4, and the vehicle body frame 2
A control seat 6 and a steering handle 7 are provided on the upper surface, and an engine 8 mounted on the front upper surface of the vehicle body frame 2 is provided.
The vehicle travels by driving both front wheels 3 and both rear wheels 5.

In this case, a speed change mechanism 9 for the front wheels 3 and the rear wheels 5 is provided on the lower surface of the vehicle body frame 2, and the speed change mechanism 9 controls a travel speed change lever 10 located on the left side of the seat 6. When the speed change guide plate 11 is rotated from the neutral position N, where no power is transmitted, to the rear position along the guide groove 12, the vehicle body 1 travels forward by one speed, and from this position it is further rotated to the rear position R. When the vehicle is rotated from the neutral position N to the forward position, the vehicle body 1 moves backward.
is configured to run in second gear forward.

Reference numeral 13 indicates a seedling planting device connected to the rear part of the traveling vehicle body 1 via a parallel link mechanism 14 so as to be movable up and down. Transmission case 16 to be transmitted, a pair of left and right planting cases 17 attached to both left and right sides of this transmission case 16, and both planting cases 1
It consists of a float 18 mounted on the lower surface of the planting case 17 so that its front part can freely move up and down, and a seedling stand 19 whose upper end is inclined so as to approach the traveling vehicle body 1. A vertically swinging type seedling planting mechanism 20 is provided, and a single acting hydraulic cylinder 21 is provided between the traveling vehicle body 1 and the parallel link mechanism 14 for raising and lowering the seedling planting device 13. It is being

A spool-type hydraulic switching valve 22 is disposed at the lower right side of the seat 6 in the traveling vehicle body 1 so that a spool 23 of the hydraulic switching valve 22 slides in the longitudinal direction of the traveling vehicle body 1, The spool 23 of the hydraulic switching valve 22 is biased by a spring 24 to protrude forward, and when the spool 23 is in the protruding position, it is in a lowered position where the hydraulic pressure in the hydraulic cylinder 21 is released. When the spool 23 retreats from the protruding position, the spool 2 is moved to a neutral position that cuts off the flow of hydraulic pressure into and out of the hydraulic cylinder 21.
3 is further rearward from the neutral position, hydraulic cylinder 2
1, each is configured to switch to a raised position that supplies hydraulic pressure to the pumps 1 and 1.

Reference numeral 25 indicates a manually rotatable lift lever located on the right side of the seat 6;
The base end of 5 is attached to one end of an elevating shaft 26 which is pivotally supported in the left-right direction of the vehicle body 1 under the seat 6, so that the elevating shaft 26 can be rotated by rotating the elevating lever 25 in the front-rear direction. The lever 2 that comes into contact with the spool 23 of the hydraulic switching valve 22 is attached to the mounting and lifting shaft 26.
7, and lift lever 25 and hydraulic switching valve 22.
By interlocking the lifting lever 25 with
When the is moved to the A position along the guide groove 29 in the guide plate 28, the spool 23 of the hydraulic switching valve 22 protrudes, and the hydraulic switching valve 22 is in the lowered position, but the lifting lever 25 is moved backward from the A position to the B position. When the hydraulic switching valve 22 is rotated, the spool 23 is retracted and the hydraulic switching valve 22 is switched to the neutral position.

The lifting shaft 26 is provided with a semicircular curved portion 26', and the curved portion 26' and the constituent members of the traveling vehicle body 1,
For example, by installing a spring 31 between the cover case 30 to which the guide plate 28 is attached, when the lift lever 25 is at the A position, the spring 31 moves the lift lever 25 to the A position, that is, the lowered position. When the elevator lever 25 is rotated backward from the A position, the elevator lever 2 is rotated by the force of the spring 31.
5 is configured to overcome the force of the spring 24 of the switching valve 22 and rotate rearward, that is, in the direction of the raised position, and the lifting lever 25 is rotatably tilted outward to the right with respect to the lifting shaft 26. By pivoting the pin 32, when the elevator lever 25 is placed in the neutral position B, it is fitted into the horizontal groove 33 in the guide groove 29 and locked in the neutral position.
Note that a spring 32' is used to maintain the state in which the lifting lever 25 is fitted into the horizontal groove 33.

The elevating shaft 26 is extended in the direction of the traveling speed change lever 10 located on the left side of the seat 6, and a T-shaped interlocking lever 34 is fixed to the tip thereof. Further, the traveling speed change lever 10 is pivotally connected to the pivot shaft 35 at the base end thereof by a pin 36 so that it can be tilted outwardly, that is, to the left with respect to the traveling direction. , a spring 37 mounted between the travel gear shift lever 10 and the pivot shaft 35;
, the traveling gear shift lever 10 moves toward the right inner surface 12' of the guide groove 12 in the guide plate 11.
The guide plate 1 is biased to be in constant contact with the guide plate 1.
1, the portion of the guide groove 12 from the first speed forward position to the R position for reverse travel is formed wide, and the traveling shift lever 10 is rotated to walk along the left inner surface 12'' of the guide groove 12. The traveling speed change lever 10 is configured so that it can be operated, and the travel speed change lever 10 is connected to the right inner surface 12' of the guide groove.
When rotating backward along
0 is provided with an interlocking piece 38 that comes into contact with the T-shaped interlocking lever 34 and rotates it rearward when the guide groove 12 is rotated rearward along the left inner surface 12'' of the guide groove 12. It is what it is.

In this configuration, the traveling speed change lever 10 is always in contact with the right inner surface 12' of the guide groove 12 in the guide plate 11 due to the bias of the spring 37, and in this state, the traveling speed change lever 10 is moved in the front-rear direction. Even when the rotation is performed, the interlocking piece 38 does not come into contact with the T-shaped interlocking lever 34 on the elevating shaft 26, in other words, the interlocking relationship between the traveling speed change lever 10 and the elevating lever 25 is released. In this case, since the traveling speed change lever 10 and the lift lever 25 can be operated separately and independently without being related to each other, the lift lever 25 is set to the A position so that the seedling planting device 13 and its float 18 are grounded on the field. (At this time, the lift lever 25 is held at the A position by the spring 31.) Then, by rotating the traveling speed change lever 10 from the N position to the N position, the entire rice transplanter moves forward by one speed. The rice transplanter travels and performs the designated rice-planting work, and this rice-planting work progresses until the front part of the rice transplanter hits the ridge, where the seedling-transplanting device 13 is raised once and then moved back a little to 180 degrees. To turn in the ° direction, press the travel gear shift lever 11 in the first speed forward travel position toward the left outer side against its spring 37 to open the opening groove 12 in the guide plate.
When the travel gear lever 10 is in contact with the left inner surface 12'', it is rotated to the rear R position.Then, by operating the travel gear shift lever 10 in the left outer direction, the interlocking piece 38 moves to the position shown in FIG. As shown by the two-dot chain line, the interlocking lever 34 on the lift shaft 26 is engaged with the gear lever 34, so by rotating the gear shift lever 10 backward in this state, the interlocking lever 34 to the lifting shaft 26 and the lifting lever 25.
rotates backward, and this rotation of the lift shaft 26 switches the hydraulic switching valve 22 to the raised position, and the lift lever 25 is held in the raised position C by its spring 31, so that the seedling planting device 13 is operated under hydraulic pressure. cylinder 21
Then, when the gear shift lever 10 reaches the R position, the vehicle moves backward. Therefore, the raising operation and the backward traveling operation of the seedling planting device 13 are performed by rotating the shift lever 10. Therefore, they can be done at the same time.

In this way, after raising the seedling planting device 13 at the edge of the shore, the seedling planting device 13 is moved slightly backward, and then the traveling gear shift lever 10 is set to the position and the device is driven forward at the first speed. (maintaining the raised position) Turn the handle 7 to turn the seedling planting device 13 in the direction of 180 degrees, move it forward along the seedlings to be planted, and rotate the lifting lever 25 from the C position to the A position By descending, rice planting work can begin again.

When storing the rice transplanter indoors or mounting the rice transplanter on a truck or the like, when traveling backwards without raising the seedling transplanting device significantly, the traveling speed change lever 10 is moved so that the speed change lever 10 is 31, the interlocking piece 38 is moved to the R position while being in press contact with the right inner surface 12' of the guide groove 12 in the guide plate 11, so that the interlocking piece 38 is moved to the rising shaft 26.
Since it does not engage with the upper interlocking lever 34 and does not rotate the lifting shaft 26 and the lifting lever 25 in the rearward direction, the seedling planting device 13 does not need to be raised significantly.
In other words, the vehicle can travel backwards without interlocking with the raising operation of the seedling planting device 13.

[Effect of idea]

As described above, according to the present invention, when the operator grasps the travel gear shift lever and operates the travel gear shift lever in a direction that opposes the spring means, the rice transplanter moves to the interlocking position with respect to the lift lever, causing the rice transplanter to travel backwards. Although the seedling planting device can be raised at the same time as the operation, when the operator releases the travel gear lever, the travel gear lever is moved by the spring means.
The interlocking connection to the lift lever is automatically released and becomes a non-linked state, and the traveling speed change lever and the lift lever can be operated separately and independently. When installed in a vehicle, it is possible to reliably prevent the seedling planting device from rising too high and tipping over. Moreover, when the travel gear lever is released, the spring means automatically switches it to the non-interlocked state. Because it will be,
It is extremely easy to operate the non-interlocking state, and since the non-interlocking state is always kept in the non-interlocking state using the spring means, it has the effect of always being on the safe side.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a side view of a riding rice transplanter, Fig. 2 is a plan view of Fig. 1, and Fig. 3 is a side view of a riding rice transplanter.
The figure is a - enlarged cross-sectional view of Figure 2, and Figure 4 is the 3rd section.
5 is a sectional view of FIG. 3, FIG. 6 is a sectional view of FIG. 3, and 7 is a sectional view of FIG.
3 is a plan view taken from the side, FIG. 8 is a plan view taken from the side shown in FIG. 3, and FIG. 9 is a diagram showing the hydraulic circuit. 1...Running vehicle body, 9...Transmission transmission, 10
...Traveling speed lever, 13...Seedling planting device, 21...
...Hydraulic cylinder, 22...Hydraulic switching valve, 25...
Elevating lever, 26... Elevating shaft, 34... Interlocking lever, 38... Interlocking piece, 37... Spring.

Claims (1)

[Scope of utility model registration request] A lifting mechanism for raising and lowering the seedling planting device with respect to the field, and a traveling transmission mechanism including a backward traveling position, and a manually rotatable traveling transmission lever in the traveling transmission mechanism, and a traveling transmission mechanism for raising and lowering the seedling planting device. A manually rotatable lifting lever for switching and operating the mechanism is interlocked so that when the traveling speed change lever is turned to the reverse traveling position, the lifting lever is turned to the raising position of the seedling planting device. In the interlocking rice transplanter, the traveling speed change lever is configured to be switchable between an interlocking position where it is interlocked with the elevating lever and a non-interlocking position where it is not interlocked with the elevating lever; An operating device for a rice transplanter, characterized in that a spring means is provided for biasing the traveling speed change lever to the non-interlocking position.