JPH0425930Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Field of industrial application) This invention is used in the seedling feeding device of a rice transplanter.It has a simple structure, and when the flat belt for seedling feeding is loosened, the flat belt automatically The braking force works to prevent it from turning around.

(Prior Art) When a part of the bottom of the seedling stand is constructed of a flat belt with protrusions, the feeding force of the seedlings is stable and effective. It is necessary to stop the rotation of the desired flat belt in order to adjust the number of rows of transplanted seedlings.
Therefore, the applicant proposed a method described in Japanese Unexamined Patent Publication No. 59-71613, in which the driven roller is moved closer to the driving roller to loosen the tension of the flat belt wrapped around the driven roller and stop its rotation. proposed.

Furthermore, as seen in Japanese Utility Model Publication No. 2-16575, a system has been proposed in which the driven side of the seedling feeding device is braked to stop the rotation of the flat belt without moving the driven roller and the driving roller at all. There is.

(Problem to be solved by the invention) Here, the former tries to stop the rotation due to the loosening of the flat belt, but since there is a pine-shaped seedling with soil on top of this flat belt, The weight presses the flat belt against the drive roller, and the rotation of the drive roller is transmitted to the flat belt, which does not stop.
In addition, in the latter case, the flat belt is forcibly stopped in a highly tensioned state, so that the driving roller and the flat belt slip, causing uneven wear on the inner surface of the flat belt, which may reduce durability.

This invention rationally solves the above-mentioned problems by cleverly utilizing springs and having a simple structure so that when the tension on the flat belt is loosened, a braking force is applied at the same time.

(Means for Solving the Problem) That is, in order to solve the above-mentioned problem, this invention uses a flat belt 3 with projections that constitutes a part of the bottom of the seedling stand 1 to be connected to a drive roller 23 and a driven roller 4. The seedling feeding device A is configured to feed the seedlings to the side of the seedling receiving plate 22 by winding the seedling feeding device A, and is equipped with a stopper 5 that can apply a brake to the flat belt 3 by contacting the driven side of the seedling feeding device A, and supports the driven roller 4. A driven shaft 24 and a stopper 5 are provided so as to be movable in the directions of distance and distance relative to the drive roller 23, and a spring 28 is attached to the driven shaft 24 and the stopper 5, so that the stopper 5 is located on a side farther from the drive roller 23. When the stopper 5 is moved close to , the spring 28 stretches and the stopper 5 moves away from the seedling feeding device A, and the driven shaft 24 moves in the same direction to tension the flat belt 3. When the above-mentioned tension on the stopper 5 is loosened, the spring 28 moves to the stopper. 5 to the seedling feeding device A, and the driven shaft 24 moves to the drive roller 23.
The seedling feeding device in a rice transplanter is provided so that the flat belt 3 loosens as it approaches the side.

(Function) The seedling feeding device configured as described above is used by placing pine-shaped seedlings with soil on the seedling platform 1. Under normal conditions, the spring 28 is stretched to pull the stopper 5 away from the drive roller 23, and as the stopper 5 moves away from the seedling feeding device A, the driven shaft 24 is also moved by the spring 28 to move the stopper 5 away from the drive roller 23. 23, and the flat belt 3 is stretched.

Therefore, when the seedling stand 1 comes to the right or left side edge, the drive roller 23 rotates, which causes the flat belt 3 to rotate.
is driven, and the seedlings on the seedling platform 1 are sent out by a predetermined amount to the side of the seedling receiving plate 22.

Next, when this rice transplanter approached the side of the ridge,
If the multiple of the planting width of seedlings in one process does not match the width of the unplanted area in the field, the operation of some of the planting devices 2 is stopped and adjustments are made so that they match. At this time, the rotation of the flat belt 3 corresponding to the stopped planting device 2 is also stopped to prevent seedlings from being sent out.

That is, the stopper 5, which had been separated from the seedling feeding device A by stretching the spring 28,
When the force loosens, the spring 28 pulls back and contacts the seedling feeder A, applying a braking force to it. At the same time, the spring 28 is loosened, the driven shaft 24 approaches the drive roller 23, and the tension on the flat belt 3 is loosened. Therefore, even if the seedling stand 1 reaches the lateral end and rotates as described above, the flat belt 3 will not rotate.

(Effect) As described above, according to this invention, the flat belt 3
When the tension is loosened, a braking force is simultaneously applied to the seedling feeder A, thereby preventing the flat belt 3 from turning around. The structure is extremely simple, with only the spring 28 being hung between the driven shaft 24 and the stopper 5, which can move in the same direction, so that it can be provided at low cost and without any failure.

(Example) Next, an example of this invention will be described.

As shown in FIGS. 3 and 4, front and rear wheels 6,
A seedling transplanting device 11 is attached to the rear part of a machine base 7 supported by a link 12 to form a riding-type rice transplanter. The wheels 6, 6 are driven by a front engine 8, and the front wheel 6 is designed to be steered by a steering wheel 9. A seat 10 is provided behind the steering wheel 9.

The seedling planting device 11 includes a gear box 14 in the center,
It consists of a seedling platform 1 that tilts forward and moves left and right on it, and a float 15 that slides on a mud surface, and four planting devices 2 are installed at the rear end of a gearbox 14.
is provided. Incidentally, the seedling table 1 is constructed so that four pine-shaped seedlings with soil can be placed side by side. Then, the rotation of the engine 8 reaches the inside of the gearbox 14 through the transmission shaft 13, reciprocates the seedling stand 1 from side to side, and drives the above-mentioned planting device 2.
This planting device 2 is designed to cut off the seedlings on the seedling stand 1 laterally one after another at the lower end and transplant them onto the mud surface.

As shown in Fig. 4, four planting clutch levers 16 are provided on the left and right sides of the seat 10, and as shown in Fig. 1, when turned clockwise (arrow A), a wire 17 is pulled. , the pin 19 is pulled away from the outer cylindrical surface of the planting clutch 18 against the force of the spring 30. Then, this clutch 18 is pushed toward the toothed wheel 21 by the spring 31, and its pawl engages with the pawl of the toothed wheel 21, and the rotation of the toothed wheel 21 reaches the drive shaft 20 via the planting clutch 18, and the planting device 2 is driven.
Conversely, when the planting clutch lever 16 is turned in the direction of arrow A, the wire 17 is loosened, the pin 19 is pushed out by the spring 30, and its tip is connected to the planting clutch 1.
This clutch 1 engages with a cam 18a on the outer circumference of the clutch 1.
8 is pushed outward to separate the inner pawl from the pawl of the toothed wheel 21, cutting off power transmission during this time and stopping the rotation of the planting device 2.

As shown on the right side of FIG. 1 and FIG. 2, a pair of side frames 25, 25 are vertically fixed to the back surface of the seedling stand 1 so as to correspond to each of the four seedlings with soil. A single common drive shaft 32 is supported at the lower ends of the side frames 25, 25. This drive shaft 32 is provided so as to rotate only when the seedling stand 1, which is moving left and right, comes to the lateral end. Note that the configuration for moving the seedling platform 1 left and right and the configuration for rotating the drive shaft 32 are well known, so
Details are omitted to avoid complexity.

Four drive rollers 23 are fixed to the drive shaft 32, each corresponding to four seedlings with soil.

Each of the side frames 25, 25 has long holes 26, 27 vertically provided at its upper end in a direction along the bottom of the seedling stand 1. Both ends of the drive shaft 24 are supported by the lower elongated hole 26 so that it can move toward and away from the drive roller 23 . Each driven roller 4 is rotatably provided on the driven shaft 24, and a flat belt 3 with a protrusion is wound around the drive roller 23 and the driven roller 4. The upper surface of each flat belt 3 constitutes a part of the bottom of the seedling stand 1.

A stopper 5 that contacts the flat belt 3 from above to stop its rotation includes a support rod 5a that extends from side to side.
Both ends of this support rod 5a are supported by the elongated hole 27. Both ends of a pair of springs 28 are attached to both ends of the driven shaft 24 and to both ends of the support rod 5a so as to draw them together. Then, the end of the wire 29 extending from the planting clutch lever 16 reaches the stopper 5, and when the wire 29 is turned clockwise, the wire 29 moves the stopper 5 in the direction of arrow B (away from the drive roller 23).
When the support rod 5a is pulled away from the flat belt 3 to release its braking, the left and right sides of the support rod 5a move the driven shaft 24 in the same direction by the springs 28 at both ends, and the driven roller 23 comes to tension the flat belt 3. ing.

Therefore, when the planting clutch lever 16 is turned clockwise, the planting device 2 starts rotating as described above, and in conjunction with this, when the seedling platform 1 reaches the lateral end, the driving roller 4 drives the flat belt 3, each seedling with soil is sent to the seedling receiving plate 22 at the lower end, and the lower end of each seedling with soil is cut off horizontally one by one by each planting rod 2.

Moreover, when this planting clutch lever 16 is turned in the direction of arrow A, the respective wires 17 and 29 are loosened, power transmission from the gear wheel 21 is cut off, and the planting rod 2
stops rotating, and in conjunction with this, the stopper 5 is pulled toward the driven shaft 24 by the left and right springs 28, and its tip contacts the flat belt 3, stopping its rotation, and the driven shaft 24 is pulled toward the driven shaft 3. It moves to the driving roller 23 side due to the tension of the driven roller 4, the weight of the driven roller 4, etc.
Even when the tension of the flat belt 3 is loosened and the drive roller 23 rotates, it slides smoothly against the inner surface of the flat belt 3.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing the relationship between the planting device and the seedling feeding device of this invention, Fig. 2 is a side view showing a part of the seedling platform, and Fig. 3 is a side view of the rice transplanter using this invention. , FIG. 4 is a plan view thereof. The symbols in the figure are as follows. 1... Seedling stand, 3
... Flat belt, 4 ... Driven roller, 5 ... Stopper, 23 ... Drive roller, 24 ... Driven shaft, 28
... Spring, A ... Seedling feeding device.

Claims (1)

[Scope of utility model registration request] The seedling feeding device A is a seedling feeding device A that sends seedlings to the seedling receiving plate 22 side by winding a flat belt 3 with a protrusion that forms a part of the bottom of the seedling platform 1 around a driving roller 23 and a driven roller 4. flat belt 3 in contact with the driven side of
The driven shaft 24 supporting the driven roller 4 and the stopper 5 are provided so as to be movable in the distance direction with respect to the driving roller 23. , the spring 28 and the stopper 5 are connected to the drive roller 2.
When moved closer to the far side than 3, the spring 28
extends and the stopper 5 moves away from the seedling feeding device A, and the driven shaft 24 moves in the same direction, causing the flat belt 3 to move away from the seedling feeding device A.
In the rice transplanter, the rice transplanter is provided in such a way that when the tension of the stopper 5 is loosened, the spring 28 pulls the stopper 5 toward the seedling feeding device A, the driven shaft 24 approaches the drive roller 23 side, and the flat belt 3 loosens. Seedling feeding device.