JPH0587202B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a structure for operating a line-drawing marker that forms a center line of the rice transplanter for the next process on the field while the rice transplanter is traveling for planting.

[Conventional technology]

The present applicant previously proposed Japanese Patent Application No. 60-251608 as a line drawing marker operating structure for a rice transplanter as described above.

With this structure, as shown in FIGS. 6 and 7, the link mechanism 04 that connects the seedling planting device and moves up and down is raised, and the connecting frame of the arm 024 attached to the top link 04a is connected to the seedling planting device side. The swinging arm 025 attached to the swinging arm 025 is pressed and rotated around the horizontal axis 0P, and the marker operation swinging wire 017 connected to the other end of the swinging arm 025 is pulled up, and the marker is biased to the lying position. is stored in an upright state, and the lower end of the connecting fitting 026 connecting the swing arm 025 and the wire 017 for marker operation is received by the fixed stopper 029, regardless of the lowering of the link mechanism 04. The stored state of the marker is maintained, and the engagement between the connecting fitting 026 and the fixed stopper 029 is achieved by pressing the operating piece 034 via the lever arm 032 which is swung around the vertical axis by operating the lever 07. It is configured so that it can be canceled by

(Problem to be Solved by the Invention) However, in this structure, the marker operation wire 017 is connected to the swing arm 025 as a means to maintain the marker in the retracted state regardless of the descent of the seedling planting device. The connecting fitting 026 is configured to be long in the vertical direction, and a fixed stopper 029 is provided in a state that projects in the movement locus of the connecting fitting 026 that is lifted by the rotation of the swing arm 025, and the stopper 029 is in sliding contact with the stopper 029. Using the deflection of the lower end of the connecting fitting 026 lifted by the stopper 02, the lower end of the connecting fitting 026 is lifted up by the stopper 02.
The structure was such that it could be caught at 9.

According to such means, when the amount of protrusion of the stopper 029 is increased in order to deepen the engagement between the connecting metal fitting 026 and the fixed stopper 029, the side pressure that the connecting metal fitting 026 receives from the stopper 029 increases, and the connecting metal fitting 026 On the other hand, if the amount of protrusion of the stopper 029 is small, vibrations of the aircraft etc. may cause both 02 and 02 to move smoothly.
There was a problem that the engagement of the stopper 6,029 disengaged immediately and it was very difficult to set the amount of protrusion of the stopper.

Furthermore, in order to release the engagement between the connecting fitting 026 and the fixed stopper 026, in order to prevent accidental release of the engagement between the two, an operating force must be applied that overcomes the urging force of the spring that strongly urges the marker in the direction of collapse. It was exactly what I needed.

An object of the present invention is to improve the locking structure of the connecting fittings so that the connecting fittings can move smoothly, be engaged reliably, and can be disengaged with a small operating force.

[Means for solving problems]

The characteristic structure of the present invention for achieving the above object is as follows:
Each of the swing arms is provided with a protruding shaft that protrudes in the horizontal direction, and a pair of left and right swing hooks that can be engaged with the protrusion shaft are provided on the vertical frame at the rear end of the link mechanism around the horizontal axis. The fulcrum of the oscillating hook and the fulcrum of the oscillating arm are attached to the top link as the link mechanism rises. When the swinging arm is pressed and rotated by the arm, the swinging hook can be engaged with the protruding shaft, and when the swinging hook and the projecting shaft are engaged, the fulcrum of the hook is , the fulcrum position is determined and arranged so that a line connecting the pivoting fulcrum of the swinging arm and the engagement point of the protruding shaft forms a triangle, and the swinging hook and the operating lever are operated by lever operation. The swinging hooks are linked together via a linking mechanism that can arbitrarily release any swinging hook, and this configuration provides the following functions and effects.

[Effect]

As the link mechanism rises, the arm attached to the top link presses and rotates the swinging arm attached to the connection frame on the seedling planting device side, and the marker operation swinging wire is pulled up and the swinging arm as a stopper is rotated. A protruding shaft protruding from a swinging arm serving as an engaged member engages with the movable hook, and the marker is maintained in an upright and retracted state regardless of the descent of the seedling planting device.

When the two are engaged, the hook first comes into contact with the protruding shaft, causing the hook to escape and the wire to be pulled up smoothly. and,
Thereafter, due to the large plunge of the hook into the rotation locus of the protruding shaft, the two are deeply engaged.

In the engaged state of both, a line segment between the pivoting fulcrum of the hook, the pivoting fulcrum of the swinging arm, and the protruding shaft engaged with the hook forms a triangle, and the hook and the pivoting arm form a triangular segment. Since the movable arms are pushed against each other, the hook is prevented from swinging and a reliable locking action is achieved.

When the engagement between the two is to be released, the hook is swung by lever operation to release the engagement between the two.

When the two are disengaged, when the hook is swung toward the disengagement side, the protruding shaft pivots in the direction of the hook toward the disengagement side about the rotation fulcrum of the swing arm. It will escape in the opposite direction, and the tension of the marker operation wire will act on the side that releases the engagement with the hook.

〔Effect of the invention〕

Since the engaging means is configured as a swinging hook type,
Even if the hook as a stopper is pushed far into the rotation locus of the protruding shaft as the engaged member, when the marker operation wire is pulled up, the hook escapes due to contact with the protruding shaft and the wire cannot be pulled up. This can be done smoothly, and when engaging with the protruding shaft, the hook can be deeply engaged by entering into the rotation locus of the protruding shaft.

Then, when the two are engaged, the hook and the swinging arm are pushed against each other, and the swinging fulcrum of the hook and the swinging fulcrum of the swinging arm are set so that the hook and the swinging arm share and support the load. Because it has been done,
For example, compared to the case where the load is supported only by the hook, the swinging movement of the hook can be fixed reliably, a good engagement action can be achieved, and the hook can be constructed from a thin and lightweight member.

In order to disengage the two, the wire tension acts on the side that releases the engagement with the hook, so unlike in the past, the wire tension acts only on the force that tries to maintain the engagement with the hook. There is no, so
The operating force required to swing the hook toward the disengagement side is small, and disengagement is facilitated.

〔Example〕

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

As shown in FIG. 5, a boarding and driving section A is formed in the center of a traveling vehicle body 3 equipped with front and rear traveling wheels 1 and 2, and seedlings are planted at the rear end of the traveling vehicle body 3 via a link mechanism 4. Device B is connected to form a riding rice transplanter.

The driving section A is provided with a steering handle 5, a seat 6, and an operating lever 7 for raising and lowering the seedling planting device B, and the link mechanism 4 is configured to be driven and swung by a hydraulic cylinder 8, and The link mechanism 4 includes a pair of left and right top links 4a and a lower link 4b.

The seedling planting device B also includes a telescopic transmission shaft 9.
A transmission case 10 through which power is transmitted from the vehicle body 3, and a seedling stand 1 on which pine-shaped seedlings W are placed.
1. Consisting of a plurality of planting arms 12 which are cyclically driven by the power from the transmission case 10 and cut out the seedlings on the seedling stand 11 one by one and plant them on the rice field, and a plurality of soil leveling floats 13... , the seedling planting device B
is configured so that it can be attached to and detached from the traveling vehicle body 3.

As shown in FIG. 1, a bellows-shaped cover 22 is provided on the outer periphery of the telescopic power transmission shaft 9 that transmits power from the traveling carcass 3 to the seedling planting device B, and
A coil spring 22a is provided between the cover 22 and the transmission shaft 9 to prevent the inner surface of the cover 22 from coming into sliding contact with the transmission shaft 9 as the transmission shaft 9 contracts.

Further, line markers 14, 14 are provided on both the left and right ends of the seedling planting device B, and the markers 14, 14 are stored in an upright state in conjunction with the rise of the seedling planting device B, and when the operating lever 7 is It is configured so that it can be selectively lowered from an upright position by operation.

That is, as shown in FIG. 4, the left and right markers 14, 14 are each supported at their proximal ends in a swingable manner by a support shaft 15, and are provided with a spring 16 to be biased in the direction of collapse. Further, one end of a wire 17 is connected to the proximal end for storing the wire 17 in an upright state by a pulling operation.

As shown in FIGS. 1 to 8, the rear end portion of the link mechanism 4 is pivotally connected to a frame 18 whose longitudinal direction is set substantially vertically, and the seedling planting device B
A transmission case 10 is rollably supported by a pivot boss 20 at the lower end of a connecting frame 19 that is detachable from a frame 18.
The seedling planting device B is configured to be attached and detached between the seedling planting device 9 and the frame 18.

The frame 18 and the connecting frame 19 are connected by inserting a hook 21 formed on the rear surface of the frame 18 into an opening 19a formed on the front surface of the connecting frame 19 and engaging the hook 21 formed on the front surface of the connecting frame 19. Insert the pair of pins 29, 29 into the pin holes 30, 30 formed on the rear surface of the frame 18, and
A swinging hook 23 provided on the rear surface of the frame 18,
This is done by engaging 23.

Further, an arm 24 is provided on each of the left and right top links 4a, and a horizontal axis P is attached to the connecting frame 19.
A pair of left and right swinging arms 25, 2 that can swing freely around the
5, and the other ends of the wires 17, 17 are connected to one end side of the swing arms 25, 25 via connecting fittings 26, 26, respectively.

When the seedling planting device B is raised from FIG. 2 to FIG. 1, the arm 24 comes into contact with the swing arm 25, causing the swing arm 25 to swing around the horizontal axis By moving the left and right markers 14, 14 are stored in the switched state.

Further, the swing arm 2 is attached to the frame 18 so as to prevent the left and right markers 14, 14 from falling down when the seedling planting device B is lowered.
5, 25 and the connecting fittings 26, 26 protrudes outward from the sides of the fuselage, and the protruding shaft 27,
A pair of left and right swinging hooks 31, 3 that can be engaged with 27
1, the swinging hooks 31, 31 are provided with
can be released from engagement by swinging around the horizontal axis Q by pulling the release wires 32, 32, and is urged toward the engagement side by springs 33, 33.

Further, as shown in FIG. 1, the operating lever 7 is
An operation position UP that raises the seedling planting device B, a neutral position N that stops the seedling planting device B at an arbitrary level,
A position DOWN in which the seedling planting device B is maintained in an automatic lifting control state and the seedling planting device B is not driven;
and maintaining the seedling planting device B in an automatic lifting control state,
In addition, it is configured so that it can be operated to the ON position to drive the seedling planting device B, and in this ON state, it can be operated to the left and right rocking operation positions L and R that lower the left and right markers 14, 14. It is configured as follows.

In other words, the swinging pieces 37, 37 which are swingable around the axis X are provided at the swing operation positions L, R, and the left and right markers 14, 14 are moved in response to the left and right operations of the control lever 7, respectively. The other ends of the release wires 36, 36 are connected to the swing pieces 37, 37 so that the release wires 36, 36 lie down, respectively.
is connected to.

Therefore, when the operating lever 7 is operated to the right after being moved to the operating position ON, the release wire 36 is pulled and the swinging hook 31 and the protruding shaft 27 are pulled.
When the engagement with the mark 14 is released, the biasing force of the spring 16 causes the mark 14 on the right side to fall down.

Moreover, when the operating lever 7 is operated in the opposite direction, the left marker 14 is brought down.

Incidentally, the operating lever 7 is connected to the hydraulic cylinder 8.
It is configured to be able to operate a hydraulic valve (not shown) for, and as shown in FIGS. 2 and 3,
Pulleys 39, 39 are provided at the lower end of the connection frame 19 to guide the wire 17 disposed between the restrictor 26 and the marker 14.

Reference numeral 34 denotes a hook for maintaining the upright and retracted state of the marker 14 when the seedling planting device B is removed from the traveling vehicle body 3, and is provided corresponding to the left and right markers 14, 14, respectively.

In the above embodiment, this is referred to as a linkage mechanism that links the operating lever 7 and the swinging hook 31 using the swinging piece 37 and the release wire 36.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of the drawing]

The drawings show an embodiment of the line drawing marker operating structure of a rice transplanter according to the present invention, FIG. 1 is a schematic side view showing the linkage of the operating structure, FIG. 2 is a side view showing the operating state, and FIG. 3 is a rear view. FIG. 4 is a rear view showing the switching state of the marker, FIG. 5 is a side view showing the entire riding rice transplanter, and FIGS. 6 and 7 are a side view and a rear view showing the conventional structure. 3... Running vehicle body, 4... Link mechanism, 4a...
Top link, 4b...Lower link, 14...Marker, 17...Wire, 18...Vertical frame, 19...Connection frame, 24...Arm, 2
5... Swinging arm, 27... Protruding shaft, 31... Swinging hook, 36, 37... Connection mechanism, P, Q...
Horizontal axis.

Claims (1)

[Claims] 1. A pair of swinging arms 25, 25 are provided on the connection frame 19 of the seedling planting device B connected to the rear end of the lifting link mechanism 4, and each swinging arm 25, 25 has a left and right Wires 17, 17 for operating the line-drawing markers 14, 14 are connected, and both the swing arms 25, 25 are swung as the link mechanism 4 rises, thereby forcing the line-drawing markers 14, 14 to fall down.
In the line drawing marker operation structure of the rice transplanter configured to stand up and store the vertical frame 18 at the rear end of the link mechanism 4.
are provided with swinging hooks 31, 31 which are forcefully engaged with protruding shafts 27, 27 which project laterally from the swinging arms 25, 25, and the swinging fulcrum of the swinging hooks 31 and the swinging arm 25 are provided. When the swinging arm 25 is pressed and rotated by the arm 24 attached to the top link 4a as the link mechanism 4 rises, the swinging hook 31 can engage with the protruding shaft 27. and the swinging hook 3
1 and the protruding shaft 27, the fulcrum positions are set so that the line segment connecting the fulcrum of the hook 31, the rotational fulcrum of the swinging arm 25, and the engagement point of the protruding shaft 27 forms a triangle. The swinging hooks 31, 31 and the operating lever 7 are linked via linking mechanisms 36, 37 that can arbitrarily release the swinging hooks by operating the lever. A line drawing marker operation structure for a rice transplanter, which is characterized by a