JPH0451544Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device for vertically adjusting an apron, which is located at the lower end of a seedling stand and supports seedlings, in a rice transplanter.

Conventionally, an apron adjusting device, as shown in FIG. 5, connects a plurality of arms 2 to an apron 1, and these arms 2 are connected by rods 5 each having a turnbuckle 3. And arm 2
By operating an adjustment lever 6 fixed to one of the arms, each arm 2 connected by a rod 5 is rotated at the same angle, and the apron 1 is adjusted up or down. Incidentally, in recent years, due to an increase in the number of planting rows of rice transplanters, the length of the apron 1 has also increased, and the number of arms 2 has also increased accordingly. As a result, since each arm 2 is connected by a rod 5, the play in each connection part is accumulated, and the more the distance from the adjustment lever 6, the larger the play is, and therefore the play in each connection part due to wear etc. When , the arm 2 at the part far from the adjustment lever 6 becomes larger.
The amount of apron adjustment by
The planter was positioned diagonally, causing a problem in which the amount of scraping done by the planter at one time was different on the left and right sides of the seedling stand. Furthermore, in order to adjust the arm 2 relative to the apron 1, the adjusting lever 6 must be adjusted, since adjusting one turnbuckle 3 affects all arms 2 that are remote from the turnbuckle 3 relative to the adjusting lever 6. It is necessary to adjust all turnbuckles 3 sequentially from
It was very troublesome.

Therefore, the present invention provides a plurality of arms rotatable relative to the machine body at multiple locations in the direction of movement of the seedling tray of the apron, connects the apron to one end of these arms, and connects an adjuster to the other end. Furthermore, each of these adjusters is releasably fixed to one connecting rod, and an adjustment lever is connected to at least one of the arms, thereby solving the above-mentioned drawbacks in a rice transplanter. It is an object of the present invention to provide an apron adjustment device.

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

In Figures 1 and 2, 10 is a drive case that constitutes the body of the rice transplanter, and a planter (not shown) is rotatably installed in the case 10, and it faces rearward and upward. Handle 1
1 is extended, and a seedling stand 12 is supported so as to be movable laterally via a slide piece.
Further, an apron 1 is provided at the lower end of the seedling stand 12. The upper end of the drive case 10 located on the back side of the seedling stand 12 is configured to expand laterally, and the expanded case 10a is equipped with a seedling stand lateral transport device. Further, slide bars 13 fixed to the seedling stand 12 protrude from both ends of the case 10a, and apron support plates 15, 15 hanging downward are fixed to both ends of the case 10a. . Furthermore,
These apron support plates 15 and drive case 1
A long apron stay 16 is fixed to 0, and the stay 16 is made of a sturdy member with a rectangular cross section.

And, as shown in detail in Figures 3 and 4,
Bolts 1 are fixed to the stay 16 at predetermined intervals.
A large number (four) of arms 2 are rotatably supported using 7 as a fulcrum, and these arms 2 have a bell crank shape, and a pin 19 is attached to one end 2a of the arms 2.
An adjuster 20 is rotatably connected thereto, and a bolt 21 is connected to the other end. Also, the bolt 21 is attached to the apron stay 16.
The supporting part 1a of the apron 1 is fixed to the tip of the hole 16a which is long in the vertical direction, and the supporting part 1a of the apron 1 is fixed by a bracket 22, and the nuts 23, 23 are fixed to the base end by a washer. 2
A spring 26 is compressed through a washer 25, and the spring 26 presses the arm 2 against the stay 16 through a washer 25 to prevent the arm 2 from moving blindly.

On the other hand, the adjuster 20 consists of a plate 20a bent into a U-shape, and a connecting rod 2 is inserted between the plates 20a.
7 and is fixed with bolts 29 and nuts 30. In addition, as shown in FIG. 2, the connecting rod 27 extends over all the arms 2,
By loosening the nut 30, each adjuster 20 connects to the connecting rod 27 and thus to the other adjuster 2.
The fix can be canceled without affecting 0. Further, an adjustment lever 6 is fixed to one of the arms 2, and the lever 6 extends upward through a lever guide 31 having a scale.

Since the present embodiment has the above-described configuration, in order to adjust the apron 1 up and down to adjust the amount of seedlings per stroke by the planter, the operator reaches out to the position of the adjustment lever 6 and moves the lever guide. Rotate to the specified position while looking at the scale 31. Then, the arm 2 fixed to the adjustment lever 6 rotates together around the fulcrum bolt 17, and the arm 2
Each arm 2 rotates together with the rotation of the arm 2 via the connecting rod 27. As a result, the bolt 21 located at the tip 2b of each arm 2 moves vertically along the elongated hole 16a, and the apron 1a fixed to the bolt 21 is further adjusted in the vertical direction.
At this time, since each of the four arms 2 are rotated at the same angle via one connecting rod 27, all the bolts 21 are adjusted by the same amount, and the apron 1 is moved in parallel without tilting. Ru. Also, each arm 2
... rotates around the fulcrum bolt 17, so the pin 19 at the tip of the arm moves along an arc-shaped locus centered around the fulcrum bolt 17, but each arm 2... all moves at the same angle. Therefore, the connecting rod 27 moves in the direction of the arrow in FIG. 3 and also moves in parallel in the vertical direction without interfering with the movement of the arm 2 along the arc-shaped movement locus. Further, since each lever 2 is pressed against the apron stay 16 by a spring 26, the bolt 21 and hence the apron 1 are prevented from moving blindly and are held at a predetermined position.

Furthermore, in order to determine the relationship of each arm 2 to the apron 1, loosen the nuts 30 and release all the adjusters 20 from the connecting rods 27.
In this state, use a gauge or the like to adjust the apron 1 so that the amount of seedlings removed when the seedling tray 12 is positioned at both left and right ends is the same. and fix each adjuster 20 to the connecting rod 27. At this time, each arm 2... is in a state where its one end 2a is substantially upright, and the vertical movement accompanying the swing adjustment of the arm 2 is extremely small; Movement is pin 1
Adjuster 20 and connecting rod 27 in a state where 9 and adjuster 20 are fitted together and nut 30 is loosened
This is absorbed by the backlash of the arm 2, and does not interfere with the adjustment of the arm 2. As a result, all the arms 2... are positioned at the optimum position in one operation, and from then on, each arm 2... is positioned at the optimum position based on the operation of the adjustment lever 6.
... rotate in parallel, and the apron 1 is adjusted up and down without tilting.

As explained above, according to the present invention, each arm 2 whose one end is connected to the apron 1...the other end is connected to one connecting rod 27 via the adjuster 20, so that play at each connecting part is reduced. There is no accumulation, and all the arms 2 move the apron 1 up and down as one, and the apron 1 can be accurately positioned over a long period of time without being tilted. Furthermore, even if the seedling stand 12 is long, the apron 1 is positioned by one connecting rod 27 and a plurality of arms 2 fixed to the rod 27, so that the apron 1 does not bend. Therefore, there is no possibility that the amount of seedlings removed varies depending on the location. Furthermore, when adjusting the apron 1, it is sufficient to make each arm 2 parallel to each other with the adjuster 20 released, and then fix each adjuster 20 to the connecting rod 27 in this state, and each arm 2 is connected to the other arm. Each arm 2 can be adjusted independently without affecting the apron 1, and each arm 2 can be adjusted with respect to the apron 1 very easily. Further, since only one connecting rod 27 is required and a turnbuckle or the like is not required on the rod 27 side, the number of parts is reduced and the structure is simplified.

[Brief explanation of the drawing]

Figure 1 is a side view showing the main parts of the rice transplanter to which the present invention is applied, Figure 2 is its rear view, Figure 3 is its partially enlarged view, Figure 4 is its side sectional view, and Figure 5. 1 is a diagram showing a conventional example. 1... Apron, 2... Arm, 10... Body (drive case), 12... Seedling stand, 20...
Adjuster, 27...Connection rod.

Claims (1)

[Scope of utility model registration request] In a rice transplanter having a seedling tray supported so as to be movable in the lateral direction of the machine body and an apron disposed at the lower end of the seedling tray, a plurality of seedling trays are placed at multiple locations in the lateral movement direction of the seedling tray on the apron. Arms are provided rotatably relative to the machine body, an apron is connected to one end of these arms, an adjuster is connected to the other end, each of these adjusters is releasably fixed to a single connecting rod, and An apron adjustment device for a rice transplanter, comprising an adjustment lever connected to at least one of the arms.