JPH0221850Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a planting device that, when planting by sliding the planting device on a mud surface, causes the left and right wheels to pick up irregularities on the tiller due to the reverse lifting and lowering of the left and right wheels. This walk-behind rice transplanter is configured to prevent rolling of the rice transplanter, and to stably support the machine body on the ground by integrating the left and right wheels when lifting the planting device and not planting, such as when rotating the machine. A linkage mechanism that operates a swinging fixing pin for a swinging member for linking the wheels to move up and down in a counterclockwise manner in the fixing release direction in conjunction with the engaged operation of the operating lever of the biased planting clutch. Regarding the walking rice transplanter provided.

In this type of conventional walk-behind rice transplanter, the linkage mechanism includes a spring that operates and biases the pin in the fixing direction, and a spring that fixes the pin against the biasing force of the spring when the operating lever is engaged. It consisted of a connecting device such as a wire that was operated in the release direction. With this configuration, when the operating lever is turned on, the biasing force against the pin acts as a resistance to the turning operation, that is, a force that urges the operating lever in the cutting direction. If it is done half-heartedly,
When the operating lever stops midway due to synergy with the operating resistance of the operating lever, or when the operating lever is configured to be able to freely switch between the on position and the off position (generally, in rice transplanters, (often constructed in this way) has the drawback that the planting clutch is not reliable in its engagement operation, such as returning to the cutting position unexpectedly. the result,
At the start of planting, the planting clutch may not be inserted against the intention, and the planting device may not operate, resulting in missing plants. As a countermeasure to this problem, it may be possible to increase the biasing force of the planting clutch, but this would result in the inconvenience that the cutting operation of the operating lever becomes unduly heavy and requires labor.

The purpose of the present invention is to eliminate such conventional drawbacks and inconveniences.

The characteristic configuration of the walk-behind rice transplanter according to the present invention, which was taken to achieve the above object, is that the linkage mechanism includes a spring that operates and biases the pin in the fixing release direction, and a spring that operates and biases the pin in the direction of releasing the fixation. It consists of a linking tool that operates the pin in the fixing direction against the biasing force.

The operation of the present invention having the above characteristic configuration is as follows.

In other words, the biasing force against the pin by the spring does not act as resistance to the operation of the operating lever;
Since it acts as a force that biases the operating lever in the closing direction, the closing operation of the planting clutch can be ensured without increasing the loading force of the planting clutch.

Therefore, the present invention prevents the plant from starting planting by operating the operating lever while maintaining good operability in disengaging the planting clutch. I was able to achieve the effect that it can be done without any trouble.

In particular, by configuring the operating lever so that it can be switched unstably between the engaged position and the off position, even if the operating lever is released midway, the operating lever can be moved to the engaged or off position. Although the attempt is made to improve operability by restricting the operation lever's operation stop position to only two positions, the on/off position, this makes it extremely difficult for the operation lever to be operated half-heartedly. Useful.

Hereinafter, embodiments of the configuration of the present invention will be described based on the drawings.

An engine 2 and a transmission case 3 are placed in front of a pair of left and right wheels 1, 1' that can swing up and down, and
A planting device 4 and a steering handle 5 are provided at the rear of the wheels 1 and 1', and a spare seedling stand 6 is provided above the bonnet 2A of the engine 2, which is rotatable around the vertical axis a. The walking rice transplanter is equipped with a group of floats F, and the wheel support frames 1A and 1A', which also serve as transmission cases and are swingable up and down, support the wheels 1 and 1', respectively. The swinging member 7 is connected to both ends of the swinging member 7 via rods 8 and 8', the swinging member 7 swinging the swinging member 7 counterclockwise around the vertical axis X. In other words, both wheels 1, 1' are
They are linked via the swinging member 7 to move up and down in a reverse manner.

The swinging member 7 is attached to a member 10 that is driven and moved back and forth via a hydraulic cylinder 9, and is aligned with the vertical axis X.
It is pivoted around the body so that it can swing freely. In other words, both wheels 1, 1' are configured to move up and down by the expansion and contraction of the hydraulic cylinder 9. The fore-and-aft moving member 1
A suspension spring 11 is interposed between the hydraulic cylinder 9 and the hydraulic cylinder 9.

Moreover, by inserting the swinging member 7 into a hole 10a formed in the longitudinally moving member 10, the swinging member 7 can be inserted into a swinging posture in which both wheels 1 and 1' are positioned at the same height. A pin 12 is attached to fix the swing relative to the back and forth moving member 10.

The pin 12 operates in the fixing release direction (that is, the extraction direction) in conjunction with the engagement operation of the operating lever 14 of the planting clutch 13 that is biased to engage, and the pin 12 and the operating lever are A link mechanism 15 with the operating lever 14 includes a spring 15A that biases the pin 12 in the extraction direction, and a spring 15A that biases the pin 12 in the extraction direction.
and a linking tool 15B that operates the pin 12 in the fixing direction (that is, the insertion direction) against the biasing force of the spring 15A by the cutting operation.

The operating lever 14 is connected to the operating lever 14 via a wire 16 and a lever 17 which uses the biasing force of the planting clutch 13 to unstably switch the operating lever 14 between a clutch engaged position _P1 and a clutch disengaged position _P2 . It is linked to the planting clutch 13.

The linking tool 15B includes a swinging lever 15a linked to the pin 12, and a wire 15C linked to the swinging lever 15a at one end via a spring 15b and linked to the string rod 17 at the other end. It is composed of.

The spare seedling stand 6 is for placing two pairs of left and right spare seedlings side by side, front and back, and the left and right partitions 6A extending between the front and rear ends are erected at the front of the bonnet 2A. By the marker 18, the left and right grip portions 5a, 5 of the steering handle 5 are
It acts as a guide to indicate the driving direction to the operator holding the a, and it is made easy to recognize visually by making the part a different color from other parts.

According to the configuration of the embodiment described above, since the spring 15A that biases the pin 12 operates and biases the pin 12 in the extraction direction, the operating lever 14 is connected to the depot point.
When the operating lever 14 is moved to the clutch engaged position P ₁ from DP, the operating lever 14 is moved to the clutch engaged position P _1.
can be moved reliably.

Note that the pin 12 may be attached to the back-and-forth moving member 10 side, that is, to the fixed part side.

[Brief explanation of the drawing]

The drawings show an embodiment of the walking-type rice transplanter according to the present invention, in which Fig. 1 is a side view, Fig. 2 is a plan view, Fig. 3 is a partially cutaway plan view of the main part, and Fig. 4 is a third It is a sectional view taken along the - line in the figure. 1, 1'...wheel, 17...swinging member, 12...
... Swing fixing pin, 13 ... Planting clutch, 14
...Operation lever, 15...Linkage mechanism, 15A...
Spring, 15B... linking tool.

Claims (1)

[Claims for Utility Model Registration] A planting clutch 1 which is energized by a swinging fixing pin 12 for a swinging member 7 for linking the left and right wheels 1 and 1' to move up and down in a reverse manner.
In the walk-behind rice transplanter, the linkage mechanism 15 is provided with a linkage mechanism 15 that operates in the fixing release direction in conjunction with the engagement operation of the operating lever 14 of No. 3. the spring 15A, and the operating lever 1.
A walking rice transplanter comprising a linking tool 15B that operates the pin 12 in the fixing direction against the biasing force of the spring 15A by the cutting operation of step 4. The operating lever 14 is in the clutch engaged position.
The walk-behind rice transplanter according to claim _{1, which is capable of unstable switching between clutch cut position P 1} and clutch cut position P ₂ .