JPS6018017Y2 - Auxiliary spring device for riding rice transplanters - Google Patents

Description

[Detailed description of the invention] This invention is a riding rice transplanter that is equipped with a pair of left and right auxiliary springs that support the planting part, which is supported by a three-point link so as to be able to move up and down, upwardly in the working position. The present invention relates to an auxiliary spring device including the above-mentioned auxiliary spring.

In a riding rice transplanter that is equipped with a float that no longer supports the machine body but only supports the planting section from below, if the above-mentioned auxiliary spring is not installed, the planting section will be Since the planting part is supported only by the float in the working position, the state of planting is unstable. Therefore, an auxiliary spring as mentioned above is installed to make it easier to pull the planting part upward in the working position. The seedlings are planted while the planting part is supported by the float and the auxiliary spring, and stable planting is achieved.

The purpose of this invention is to compensate for the fluctuations in the load distribution in the left and right directions due to the lateral movement of the seedling stand in the planting area, and to ensure stable seedling planting. The present invention provides a novel auxiliary spring device for a riding rice transplanter.

Regarding the illustrated embodiment, to explain the structure of the auxiliary spring device in the riding rice transplanter according to this invention, as shown in Figs.
The top link 1 of the book and a pair of left and right lower links 2 connect a support frame F made of pipe material so that it can rise and fall freely. A top link 4 and a pair of left and right lower links 5 connect the planting part P so that it can be raised and lowered, and the machine T pulls the planting part P while moving the machine in a flooded field. This invention has been implemented as follows in a riding rice transplanter configured to travel and perform rice transplanting work.

That is, the above-mentioned planting part P includes the planting part transmission 6, this planting part transmission 6 as usual.
The seedling stand 7 is reciprocated horizontally, the planting arm 8 is movable up and down, and the float 9 supports the planting part P from below. A pair of left and right auxiliary springs 10 are tensioned between the machine T and the support frame 1 to support the support frame F by pulling it upward. A pair of left and right auxiliary springs 11 are tensioned to support the attaching portion P in an upwardly pulling manner.
According to this invention, the auxiliary spring device including 1 is constructed as follows.

That is, a supporting frame 14 consisting of left and right plates is provided fixedly supported by pipes 12 and 13 installed horizontally in the rising frame portion 3 of the support frame F, and the base ends of the left and right auxiliary springs 11 are A fulcrum pin 1 along the horizontal direction of the supporting frame 14
The second and third
As shown in the figure, left and right brackets 1 fixedly installed on the planting part transmission 6 are attached to the planting part P mounting positions of the left and right auxiliary springs 11 provided in a diffused manner toward the tip side.
Left and right bell cranks 19 are respectively supported rotatably around a fulcrum pin 18 extending approximately in the front-rear direction.

The tips of the left and right auxiliary springs 11 are fixed to the ends of one arm 19a of the left and right bell cranks 19, and the bell crank 19 to which the ends of the auxiliary springs 11 are attached in this way
are arranged so that the other arms 19b are located opposite to each other.

Planting part P between left and right bell cranks 19 and other arms 19b
For example, a support pipe 21 extending in the left-right direction is swingably supported by the planting section transmission 6 via a support means 20 as illustrated in FIG. 2, for example.

As shown in FIG. 2-5, a bracket 22a fixed to the tip of the support pipe 21 is attached to the pin 23 from the left and right.
At this point, the left and right rods 22 connected to the ends of the other arm 19b of the bell crank 19 on that side are slidably inserted.

On each rod 22, an interlocking plate 24 located on the bracket 22a side and a spring receiving disc 25 located on the support pipe 21 side are fitted.
Left and right compression springs 26 are provided on the rod 22 with both ends received by the rods 5 and 5.

Therefore, each rod 22 is biased to move in the direction of pulling out from the support pipe 21 by the compression spring 26, but the auxiliary spring 11 on that side of each bell crank 19
A rotation force is applied in the direction of the arrow A shown in the figure, and this causes the rod 22 to be moved from the bell crank 19 side.
A movement urging force in the direction of pushing into the support pipe 21 acts on the rod 22, and the rod 22 is located at a position where the above-mentioned circumferential force is balanced.

Of the above-mentioned interlocking plate 24 and spring receiving disc 25, the spring receiving disc 25 is movable on the rod 22 so that it always comes into contact with the end face of the support pipe 21 with a spring 26. Even if the plate 24 is fixed to the rod 22,
From what has been explained above, there is no problem even if the rod 22 is supported so as to be displaceable along its length.
When an action is applied to push the interlocking plate 24 in the direction of the bell crank 19, the bellcrank 19 moves in the opposite direction of the arrow A in FIG. the direction of elongation and increasing its tension;
However, in order to provide the above-mentioned pushing action of the interlocking plate 24 in relation to the lateral movement of the seedling platform 7 in the planting section P, the following means is further provided. It is being

That is, a pair of left and right push rollers 27 are provided so as to be supported on the lower surface of the seedling table 7 at positions as shown in FIGS. 3 and 4.

As shown in FIG. 5, each of the pushing rollers 27 is provided with its roller shaft 27a fixed to the lower surface of the seedling stand 7 by welding.

The push rollers 27 on each side are arranged so that when the seedling table 7 is in the center position, the interlocking plate 24 is spaced apart from the interlocking plate 24 on that side as shown in FIGS. 3 and 4. The interlocking plate 2 is placed on the inside of the seedling table 7 in the width direction, and in the direction of the crest of the seedling table 7.
4 and supported by the seedling stand 7.

Therefore, when the seedling platform 7 moves laterally, the gap between the push roller 27 on the moving direction side and the interlocking plate 24 on that side is filled by the lateral movement of the push roller 27 that moves laterally together with the seedling platform 7. From this point on, the push roller 27 moves the seedling stand 7 onto the interlocking plate 24.
The bell crank 19 is rotated in the direction opposite to the arrow A shown in FIG. It will be.

In the illustrated case, a reversible motor 29 and a winch drum 30 rotatably driven by the motor 29 are connected to the top end of the rising frame portion 3 of the support frame F via the support frame 28.
The mounting frame 16 is equipped with a winch consisting of
The wire 31, one end of which is fixed to the curved arm 16a on one side, is wound around the winch drum 30 described above.
The mounting frame 16, which is formed by fixedly connecting the left and right curved arms 16a with a connecting rod 16b, is wound up and unwound by winding and unwinding the wire 31 by rotationally driving the winch drum 30 by the reversible motor 29, as shown by the solid line in FIG. It is configured such that it can be rotated around the fulcrum pin 15 to any position between the downwardly rotated position as shown in FIG. 1 and the upwardly rotated position as shown by the chain line in FIG.

Therefore, by selectively rotating the reversible motor 29 in one direction and the other direction, the mounting frame 16 is selectively rotationally displaced.
By changing the base end positions of the left and right auxiliary springs 11, the biasing forces of both the auxiliary springs 11 can be changed at the same time.

In FIG. 1, reference numeral 32 denotes a preliminary seedling platform supported by the seedling platform 7 via upper and lower support links 33 and 34, and installed above the upper surface of the seedling platform 7. Seedling stand 7
The seedlings are lowered from the preliminary seedling stocking position shown by the solid line, which is approximately parallel to the position, to the seedling joining position shown by the chain line, in which the end of the seedling splicing is greatly inclined towards the upper surface of the seedling platform 7, and the seedling stopper 32a at the end of the seedling splicing is released. Accordingly, a spare seedling mat is directly supplied onto the seedling table 7.

In FIG. 1, 35 is the rear wheel of this machine T, 36 is a passenger seat of this machine T, 37 is a hydraulic lift arm provided on this machine T, and 38 is this hydraulic lift arm 37 connected to the lower ring 2.
The tie rod 39 connected to is a flexible transmission shaft mechanism that transmits power from the machine T to the planting part P.

Rice planting work using the illustrated riding rice transplanter is carried out in the usual manner by the planting part P while the machine T is towing the planting part P for each support frame F and moving the machine as described above. However, during this rice-transplanting operation, the illustrated auxiliary spring device will perform the rice-transplanting operation in a stable manner as follows.

That is, as the seedling table 7 of the planting section P moves laterally, the seedling table 7 moves laterally together with the seedling table 7.

From the time when the push roller 27 on the moving direction side of the seedling platform 7 fills the gap and engages with the interlocking plate 24 on the same moving direction side, as described above, the pushing roller 27 and the interlocking plate 24
is pushed, and the bell crank 19 on the moving direction side of the seedling table 7 is pressed.
The arrow A in FIG. 4 is rotated in the opposite direction, and therefore,
As the seedling platform 7 moves laterally toward the stroke end, the tension of the auxiliary spring 11 on the side of the movement direction increases.

Depending on the lateral movement of the seedling platform 7, the load of the seedling platform, including the seedling mat thereon and, in the case shown, the preliminary seedling platform 32 and the spare seedling mat thereon, may shift. This causes the load distribution on the planting part P to be biased toward the direction of movement of the seedling platform 7, but since the tension of the auxiliary spring 11 in the direction of movement is gradually increased according to the amount of movement of the seedling platform 7, the above-mentioned The unevenness of the load distribution is compensated for, the planting part P does not roll, and the seedlings are planted uniformly in the width direction of the planting part P. The planting is performed at the depth and in the state; It will become.

In particular, each auxiliary spring 11 urges each bell crank 19 to move in the direction of arrow A in FIG. While a force is applied in the pushing direction to
Since the compression spring 26 is provided to urge the spring 9 to rotate in the direction opposite to the arrow A in FIG.

That is, as mentioned above, the position of the rod 22, and therefore the interlocking plate 24 thereon, is dependent on the auxiliary spring 11 and the compression spring 2.
The tension of the auxiliary spring 11 is set at a position where the spring force is balanced with that of the auxiliary spring 11. However, as the amount of seedlings on the seedling platform 7 and the preliminary seedling platform 32 increases, the planting part P tends to sink more. The position of the rod 22 and the interlocking plate 24 is such that the spring forces of the auxiliary spring 11 and the compression spring 26 are balanced.
As the support pipe approaches the direction of the pipe 21, the above-mentioned interval becomes narrower.

This means that the larger the amount of seedlings on the seedling platform 7 and the preliminary seedling platform 32, the earlier the push roller 27 will reach the interlocking plate 24 position when the seedling platform 7 is moved laterally, and the more the bell crank 19 will be moved. This means that the tension of the auxiliary spring 11 is increased by rotating it in the direction opposite to the arrow A in FIG. 4 from an early stage.

Therefore, when a large load moves laterally and the load distribution on the planting part P is more biased toward the side of the horizontal loading table 7 moving direction, the tension of the auxiliary spring 11 on the moving direction side is increased more. The effect of compensating for the bias in the load distribution becomes large.

As is clear from the above explanation, the auxiliary spring device in the riding rice transplanter of this invention biases and supports the planting part P, which is vertically movably supported by the three-point link 4.5, upward in the working position. In a riding rice transplanter that is provided with l pairs of left and right auxiliary springs 11, the planting portion P of the left and right auxiliary springs 11 is
The side ends are attached to the left and right movable spring attachment bodies 19 that can be displaced so as to expand and contract the auxiliary spring 11, and the movable spring attachment body 19 and the auxiliary spring 11 are attached to each of the left and right movable spring attachment bodies 19. An interlocking body 24 supported so as not to be relatively displaceable in the direction, and an elastic device 26 for displacing and biasing the movable spring attachment body 19 in the extension direction of the auxiliary spring 11 are attached.
The auxiliary spring 11 is attached to the interlocking body 24 from the time when the seedling loading table 7 is moved together with the seedling loading table 7 and the gap with the interlocking body 24 on the moving direction side is filled.
Left and right push members 2 that engage so that they cannot be relatively displaced in the extension direction
7 is provided, and when the seedling stand 7 moves laterally, the pushing member 27 on the side of the moving direction pushes the interlocking body 24 on that side, thereby pushing the movable spring on the side of the moving direction. Displace the mounting body 19 in the direction of extension of the auxiliary spring 11,
Since the tension of the auxiliary spring 11 on the side in the moving direction of the seedling platform 7 is increased, the shift or fluctuation of the load distribution in the planting section due to the lateral movement of the seedling platform 7 is compensated for, and the tension is increased in the width direction of the planting section. Uniform and stable planting is the key to achieving good conditions.

Further, in the auxiliary spring device of this invention, the movable spring mounting body 19 is displaced and biased by the auxiliary spring 11 in a direction to contract the auxiliary spring 11 itself;
9 in the direction of extension of the auxiliary spring 11 is provided, thereby adjusting the position of the movable spring mounting body 19 and the interlocking body 24, which cannot be displaced relative to each other in the direction of extension of the auxiliary spring 11, by balancing the two types of spring forces. The more the amount of seedlings on the seedling platform 7, the earlier the pushing member 27 acts on the interlocking body 24 during the lateral movement of the seedling platform 7. The larger the bias, the greater the tension of the auxiliary spring 11 on the side of the same bias, so the compensation function for the bias in the load distribution described above is extremely high.

[Brief explanation of drawings]

Fig. 1 is a side view of the main part of a riding rice transplanter equipped with an embodiment of this invention, Fig. 2 is a partially omitted plan view of the main part of the rice transplanter, and Fig. 3 is a part of the main part of the rice transplanter. FIG. 4 is a partially cutaway vertical cross-sectional schematic diagram of the same embodiment, and FIG. 5 is a cross-sectional view of only essential parts taken along the line ■-■ in FIG. 4. T...Machine, F...Support frame, P
... Song planting section, 4 ... Top link, 5 ... Song lower link, 7 ... Seedling stand, 11 ...
Auxiliary spring, 18...Curved fulcrum pin, 19...Bell crank, 19a...-Arm, 19b...
Other arms, 21...Support pipe, 22...
... Rod, 23 ... Zen, 24 ... Interlocking plate, 25 ... Spring receiving disc, 26 ... Curved compression spring, 27 ... Curved push roller, 27a. ...Roller axis.

Claims (1)

[Scope of utility model registration request] A riding rice transplanter is equipped with a pair of left and right auxiliary springs that support the planting part, which is supported by a three-point link so as to be movable up and down, upward in the working position. The side end is attached to a horizontally movable spring mounting body that can be displaced to expand and contract the auxiliary spring, and
Each of the left and right movable spring attachment bodies includes an interlocking body supported so as not to be displaced relative to the movable spring attachment body in the direction of extension of the auxiliary spring, and an elastic device for displacing and biasing the movable spring attachment body in the direction of extension of the auxiliary spring. is attached and supported by the seedling platform, and when the seedling platform is moved laterally, the interlocking body is moved together with the seedling platform to fill the gap between the interlocking body and the interlocking body on the moving direction side. The auxiliary spring device is characterized in that left and right push members are provided which engage with the auxiliary spring so as not to be relatively displaceable in the direction of extension of the auxiliary spring.