JPH0767329B2 - Granular material feeding device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a granular material feeding device for feeding seeds or granular fertilizer such as a seeding machine and a fertilizer application machine.

[Prior art]

BACKGROUND ART A conventional granular material feeding device includes a grooved roll having a plurality of feeding grooves formed on the outer periphery in a feeding case provided at a lower portion of a tank for storing the granular material, and a convex portion fitted into the groove. The feed roll consisting of the protrusion roll and the feed roll is internally mounted, and at least one of the rolls in one set is moved and adjusted in the axial direction of the support shaft to change the feed groove volume of the grooved roll to change the feed amount. It was something to adjust.

[Problems to be Solved by the Invention]

However, the conventional granular material feeding device has a structure in which the grooved roll and the projection roll have no play in the axial direction. When the effective length is shortened to reduce the feeding amount, there is a problem that the adjustment mechanism and the roll are damaged by excessive force, and smooth adjustment cannot be performed.

[Means for Solving the Problems]

In order to solve the above problems, the present invention provides a storage tank.
The feeding roll B for feeding out seeds or granular material such as granular fertilizer housed in 10 is composed of a grooved roll 18 provided with a feeding groove 18a on the outer periphery and a projecting roll 19 with a convex portion 19a fitted in this groove. It is configured such that at least one of the both rolls 18 and 19 is moved and adjusted in the axial direction of the support shaft to change the volume of the feeding groove of the grooved roll 18 and adjust the feeding amount of the particulate matter. At the same time, at least one of the two rolls 18 and 19 is spring-loaded in the direction in which the volume of the feeding groove increases.
This is a granular material feeding device characterized in that it is supported so as to be able to move against 23.40.44.

[Advantageous effects of the invention]

According to the present invention, when the delivery groove formed by the grooved roll 18 and the projection roll 19 contains particles or when the particles are clogged, the volume of the delivery groove is reduced to reduce the delivery amount. When adjusting, if the roll that is forcibly moved and adjusted is attempted to be pulled in the axial direction, the elastic spring 23.
At least one of the rolls moves in the direction in which the volume of the feeding groove increases against 40/44, and it is possible to prevent damage to these without giving an overload to the adjusting mechanism and the roll, and to prevent particulate matter in the feeding groove. When the bitten granular material is removed, it returns to the normal adjustment state and the granular material can be accurately fed out.

〔Example〕

A riding type rice transplanter with a fertilizer applicator according to an embodiment of the present invention will be described in detail with reference to the drawings.

1 is a passenger towing vehicle. A rice transplanter 2 is attached to the rear portion of the towing vehicle 1 via an elevating link mechanism 3. This rice transplanter 2 is provided with a seedling placing table 5 whose front side inclines upward in the upper part of the front part of the planting transmission case 4 which also serves as a machine frame so as to reciprocate left and right. A transplanting device 6 for dividing and transplanting seedlings is provided, and ground leveling floats 7a and 7b are attached to the lower part. The rice transplanter 2 is a double-row rice transplanter that includes a plurality of the transplanting devices 6 at predetermined intervals in the left-right direction.

The fertilizer applicator 8 includes a fertilizer storage tank 10, a fertilizer feeding device 11 attached to the lower portion of the fertilizer storage tank 10 and a funnel 12 attached to the lower portion of the feeding device 11 via a stay 9 at the rear of the planted transmission case 4. Groover equipped with the feeding section unit composed of and attached to the leveling floats 7a and 7b of the rice transplanter 2
The fertilizer fed out by connecting 13 and the funnel 12 with a transfer hose 14 is sprinkled in the paddy field. The fertilizer applicators 8 are installed laterally in the same number as the number of the transplanters 6.

The fertilizer feeding device 11 will be described in detail. A tubular screw cylinder in which a feeding case 15 having an opening communicating with the fertilizer storage tank 10 and the funnel 12 also serves as a bearing and is provided with a screw on the outer circumference on the base side. The shaft 16 is integrally provided, and the drive shaft 17 is inserted into the cylinder of the screw cylinder shaft 16 so as to be erected, and the drive shaft 17 is provided with the granular material feeding roll B for feeding and feeding the fertilizer. There is. The feeding roll B is a grooved roll.
18 and a projection roll 19, the grooved roll 18 is wedged to the drive shaft 17 via a key 20, and one projection roll 19 has its convex portion 19a in the feeding groove 18a of the grooved roll 18. It is fitted to be movable in the axial direction, and the boss portion of the gear 21 in which the boss portion is screwed onto the screw cylinder shaft 16 is rotatably attached to the protrusion roll 19 so as to be axially connected. There is. One grooved roll 18 side is the inner surface of the case 15 and the shaft 17
A spring 23 is interposed between the stopper 22 and the stopper 22, and the end face of the roll 18 is received by the stopper 22, and the other end face in the axial direction of the screw cylinder shaft 16 is provided. It is provided on the end face side in a state of being elastically held via a collar 24.

The rotation transmission mechanism of the drive shaft 17 includes the left and right feeding devices 11
・ One-way rotation clutch 25 on the drive shaft 17 located between 11.
The cover cylinder 27 in which 26 is inserted and fixed is inserted, and one end side of the cover cylinder 27 is supported by one of the feeding cases 15 via a bush 28, and is fixed to the outer ring of the one-way rotation clutch 25. The actuating arm 29 is connected to a crank which is positioned on the outer side surface of the planted transmission case 4 and is rotated through a connecting rod 31, and an arm 32 fixed to the outer ring of the other rotating clutch 26 is attached to the feeding case 15. It is fixed with a bolt 33 and the cover 27 is attached to the drive shaft.
It is fixed to 17 with a set bolt 34.

Explaining the operation of the above example, when granular fertilizer is stored in the fertilizer storage tank 10 of the fertilizer applicator 8 and the rice transplanting work is started, the crank protruding to the side surface of the planting transmission case 4 rotates together with the operation of the transplanting device 6. Then, the one-way rotation clutch 25 is operated via the connecting rod 31. That is, when the connecting rod 31 is moved upward, the cover cylinder 24 is rotated from the outer ring side, and the drive shaft 17 is transmission-rotated from the cover cylinder 24 via the set bolt 33. Also,
When the connecting rod 31 is moved downward, the power is not transmitted to the cover cylinder 24. Further, at this time, although the cover cylinder 24 serves as a spiral, the outer ring of the other rotary clutch 26 is attached to the feeding case 15, so that this reverse rotation is reliably prevented and the drive shaft 17 is accurately Being transmitted.

In this way, the drive shaft 17 is rotated from the rotation transmission system of the transplanting device 6, the grooved rolls 18 of the respective feeding devices 11 ... Are transmitted and rotated, and the projection rolls 19 fitted into the grooves 18a are also rotated. . Therefore, the fertilizer is pumped into the groove portion 18a of the grooved roll 18 which is not filled with the protruding roll 19 and discharged into the funnel 12 at the lower part, and the fertilizer is flowed down the transfer hose 14 and discharged into the groove making device 13 to be planted. At the same time, fertilizer is applied.

When adjusting the feed amount of fertilizer, the gear 21 is rotated in the left or right direction to move and adjust the gear 21 in the axial direction, and the gear 21 is engaged in a freely rotatable state. Similarly, the projecting roll 19 moving in the axial direction changes the effective length (volume of the feeding groove) of feeding the fertilizer in the groove portion 18a of the grooved roll 18 to change the feeding amount. At the time of this adjustment, when adjusting so that the amount of feeding is small, that is, when adjusting the projection roll 19 in the direction of arrow a in the figure, the effective length L of the feeding groove 18a is filled with fertilizer and adjusted. When it becomes impossible, the grooved roll 18 side moves against the spring 23.

Therefore, the threaded portion of the cylinder shaft 16 with which the gear 21 that is the mechanism for adjusting the feeding amount is screwed is damaged, or the convex portion 19 of the protrusion roll 19 is damaged.
The fitting part between a and the grooved roll 18 will not be damaged, and accurate feeding can be performed even when adjusting the feeding amount.
When the above clogging is cleared, it will automatically return to the correct state.

Only the essential parts of another embodiment will be described. In FIG. 4, no screw is provided on the outer circumference of the tip end of the screw cylinder shaft 16,
The bushes 35 and 36 are fitted to this portion, and the grooved roll 18 is fitted to this bushing portion so that both the bushes can move in the axial direction, and the stop ring 37 prevents them from falling off from the shaft end face side. There is. Then, a clutch body 39, which is wedged with a key 38 and movable in the axial direction, is provided on a drive shaft 17 having one end inserted and supported by the cylindrical shaft 16, and a clutch claw 39a integral with this clutch body has the grooved roll. It is provided so as to engage with an engaging claw 18b integrally provided on the side surface of 18, and a spring 40 elastically holds the clutch claw 39a and the engaging claw 18b so that they are always engaged. On the outer periphery of the clutch body 39, there is provided a groove 39b which engages with a pin 43 which is eccentrically set up on a shaft 42 which can be rotated by a lever 41 from the outside of the case 15. The clutch body 39 can be moved against the spring 40 to operate the clutch "disengaged", and the rotation of the feeding roll B can be stopped. According to this embodiment, the clutch spring 40 can serve the same role as the spring 23 that allows the pay-out roll B to escape in the axial direction, and the structure provided with the clutch mechanism can simplify the structure.

In the above embodiment, the grooved roll 18 side is configured to escape when overloaded. However, as shown in FIG. 5, a spring 44 is interposed between the gear 21 and the protruding roll 19. Is also possible.

Although various improvements can be considered as examples of the feeding roll B, as shown in FIG. 6, the groove portion 18a of the grooved roll 18 is formed in a spiral shape from the end face side of the roll,
If the structure is combined with the protrusion roll 19 having the spiral convex portion 19a that matches this, and the amount of feeding is adjusted while rotating the side of the protrusion roll 19, the feeding resistance when the fertilizer is taken out from the tank 10 side. Can be reduced.

In addition, the end surface of the groove portion 18a of the grooved roll 18 and the protruding roll 19
If the end surface of the convex portion 19a and the end surface of the convex portion 19a are formed into a tapered surface as shown in FIG. 7, it is convenient because it is possible to reduce the bite of fertilizer. In this case, the taper angle θ is preferably 45 degrees or less.

[Brief description of drawings]

FIG. 1 shows a rice transplanter with a riding type fertilizer applicator according to an embodiment of the present invention, FIG. 1 is a side view of the whole, and FIG. 2 is a plan view of essential parts.
FIG. 3 is a sectional view of an essential part, FIGS. 4 and 5 are sectional views of an essential part of another example, and FIGS. 6 and 7 are sectional views of an essential part showing another embodiment of the feeding roll. Indicates. In the figure, 10 is a storage tank, 15 is a feeding case, 18 is a grooved roll, 18a is a feeding groove 18a, 19 is a protruding roll, 19a is a convex portion, 23, 40 and 44 are elastic springs, and B is a feeding. It is a roll.

Claims (1)

[Claims] 1. A pay-out roll B for paying out seeds or granular materials such as granular fertilizer stored in a storage tank 10 and a feeding groove on the outer periphery.
Grooved roll 18 provided with 18a and convex portion 19a fitted into this groove
And a protrusion roll 19 with a groove, and at least one of the two rolls 18 and 19 is moved and adjusted in the axial direction of the supporting shaft to change the volume of the groove for feeding the grooved roll 18 and to feed the granular material. Both rolls 18 ・
At least one of the 19 is supported so as to be able to move against the elastic springs 23, 40, and 44 in the direction in which the volume of the feeding groove increases, and the granular material feeding device.