JPH0728594B2 - Safety device in granular material feeding device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for a granular material feeding device, such as a seeding machine or a fertilizer applicator, for feeding seeds or granular fertilizer.

2. Description of the Related Art Conventionally, there is a grooved roll that is provided at the lower part of a storage tank that stores seeds and granular fertilizers and other granular materials, and a slidable fork that fits into this groove. A fork roll having a fork roll is rotatably mounted to rotate one roll by transmission, and the other roll is rotatably engaged with a screwed gear to rotate the roll by forward and reverse rotations of the gear. A granular material feeding device is provided which moves left and right in the axial direction to change the groove length of the grooved roll to adjust the amount of feeding of the granular material, and the granular material feeding device is the axial direction of the roll rotating shaft. There is a known adjusting device which is equipped with a plurality of units in each direction and meshes the gears of each granular material feeding device with a pinion gear attached to a single manual rotating shaft to adjust the feeding amount of all the granular material feeding devices at once. Met.

However, this conventional apparatus does not have a structure in which the manual rotation shaft is slip-rotated even if the rotation resistance of the manual rotation shaft is increased.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the prior art, when the end of the feeding groove of the particulate feeding device is clogged with particles, the fork tip on the fork roll side is brought close to the end of the feeding groove, and when the minute feeding adjustment is performed, the granular material is granular. There was a problem that the manual rotation shaft was forcibly rotated without knowing that there was a jam, and the feeding device was damaged, the shaft was broken, or the screw part of the gear was damaged.

Means for Solving Problems The present invention has taken the following technical means in order to solve the above problems.

That is, the present invention, in the lower part of the storage tank 10 for storing the granular material such as seeds and granular fertilizer, is fitted with the grooved roll 19 and the groove 19a for forming the feeding groove 19a on the peripheral surface. A feeding roll body consisting of a fork roll 20 having a slidable fork 20a is rotatably mounted on one shaft to rotatably rotate one roll, and the other roll is rotatably engaged with a screwed gear 21. The granular material feeding device 11 for adjusting the feeding amount of the particulate matter by changing the effective groove length of the grooved roll 19 by moving the roll left and right in the axial direction by the forward and reverse rotation of the gear 21 is provided. The feeding device 11 is equipped with a plurality of units in the left-right direction which is the axial center direction of the roll drive shaft 22, and the gear 21 of each of the granular material feeding devices 11 is a pinion gear attached to a single manual rotation shaft 24.
In the adjusting device capable of adjusting the feeding amount of all the granular material feeding devices by meshing with 26, rotate the safety clutch 28 that the rotation of the gear 21 is interrupted when the gear 21 receives a rotation resistance more than a predetermined value. A safety device for a granular material feeding device provided between the shaft 24 and the gear 21.

EFFECTS AND EFFECTS OF THE INVENTION According to the present invention, the delivery amount of each of the granular material delivery devices can be adjusted all at once by manually rotating a single rotating shaft, and at the time of the adjustment, the granular material is delivered to one delivery device part. When a considerable amount of rotational resistance is applied to the manual rotating shaft due to a jam of the rotating shaft, the rotation of the gear of the feeding device is automatically interrupted and the rotation of the shaft slips, causing the feeding device and the shaft or gear to rotate. Prevent damage.

Embodiment A safety device of a rice transplanter granular material feeding device with a fertilizer application, which is 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 the seedlings is provided, and 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. The feeding unit A composed of is attached,
The funnel 12 is connected to the grooving device 13 attached to the leveling floats 7a and 7b of the rice transplanter 2 by the transfer hose 14 so that the fertilizer fed out is removed into the paddy field. The fertilizer applicators 8 are installed laterally in the same number as the number of the transplanters 6.

Explaining the fertilizer feeding device 11 in detail, a tubular screw shaft that also serves as a bearing in the feeding case 15 having an opening communicating with the fertilizer storage tank 10 and the funnel 12 and has a screw on the outer circumference on the base side. 16 is integrally provided, and bushes 17 and 18 are inserted and fixed in the screw-free portion of the tip end side of the screw shaft 16, and a grooved roll 19 for pumping fertilizer into the bush portion and feeding it is rotatably fitted. Then, a fork roll 20 having a fork 20a that is fitted in the feeding groove 19a of the roll 19 and axially movable is provided, and a gear in which the boss portion is screwed onto the screw shaft 16 is provided.
The bosses 21 are engaged with the fork rolls 20 so as to be rotatable and connected to each other in the axial direction. Further, a clutch 23 is provided between the rotatable drive shaft 22 inserted into the cylinder of the screw shaft 16 and the grooved roll 19 so that the power of the feeding device can be interrupted.

Reference numeral 24 denotes a manual rotation shaft, which is supported by the feeding case 15 of the feeding device 11 of each fertilizer applicator and extends in the lateral direction, and the operation handle 25 is attached to the tip thereof. 26, 26, ... are widened left and right pinion gears, which are rotatably fitted to the rotary shaft 24 and provided with clutch pawls 26a on their side surfaces, each of which has a sliding taper surface in both forward and reverse rotation directions. . 27
Is a safety clutch, which is wedged on the rotary shaft 24 so as to be movable in the axial direction and integrally rotated in the rotational direction, and the side surface of the clutch body 27 is engaged with the clutch pawl 26a. A pawl 27a is provided, and the clutch body 27 is configured such that the pawl 26a and the pawl 27a are elastically engaged by a spring 28 in a normal state.

That is, when a rotation resistance of a predetermined amount or more is applied between the pinion gear 26 and the manual rotation shaft 24, the pinion gear 26 is not rotated, the clutch body 27 escapes against the spring 28, and a safety clutch 29 is provided so that rotation is not transmitted. It is configured.

A safety clutch operation detection switch 30 is provided so that when the clutch body 27 moves against the spring 28, the switch is turned on to turn on the indicator light 31 corresponding to the feeding device.

Explaining the operation of the above example, when the granular fertilizer is stored in the fertilizer storage tank 10 during the rice planting work and the drive shaft 22 is rotated from the rotary transmission system of the transplanting device 6, the respective feeding devices 11, 11 ,.
The grooved roll 19 is transmitted and rotated via the clutch 23, and the fork roll 20 fitted in the groove 19a is also rotated. Therefore, the fertilizer is pumped into the groove portion 19a of the grooved roll 19 which is not filled with the fork roll 20 and discharged into the funnel 12 at the lower part, and the transfer hose 14 is flowed down to make the groove making device.
It is discharged into 13 and fertilizer is applied at the same time as planting.

Then, in the case of changing and adjusting the feed amount of fertilizer, when the manual rotating shaft 24 is rotated by the rotating operation handle 25 in one of the forward and reverse directions, the pinion gear 26 is rotated through the safety clutch 28, and the gear meshing with the pinion gear 26 is rotated. Since the gear 21 is rotated, the gear 21 moves to the left or right. Therefore,
The fork roll 2 engaged with the gear 21 is also moved in the same direction, and the forks 20a deeply enter the groove 19a of the grooved roll 19 or come out and become shallow. Therefore,
The amount of fertilizer to be fed will be arbitrarily changed.

In this way, the fertilizer feed rate of each base fertilizer applicator is adjusted, but when adjusting the feed rate of the fertilizer to a small amount, between the groove end side of the grooved roll 19 and the fork 20a tip of the fork roll 20. The fertilizer may be caught and the fork roll 20 may become unable to move. At this time, if the operation handle 25 is forcibly rotated, a slip occurs between the clutch claws 26a and 27a of the safety clutch 28, the clutch body 27 moves against the spring 28, and the pinion gear 26 is forcibly rotated. There is no. Therefore, the fork roll 20 of the feeding device 11 and the threaded portion of the gear 21 are not damaged. Then, in such an unexpected situation, when the safety clutch 28 operates, the switch 31 linked to the clutch 28 is turned on to turn on the warning light, and the adjuster takes measures to eliminate the clogging of the fertilizer. Good.

When the safety clutch 28 is provided between the handle shaft 25a for fixing the operation handle 25 and the rotary shaft 24 as shown in FIG. 6, each safety device 28 can protect each feeding device 11. it can.

[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 front sectional view of an essential part, FIG. 4 is a side sectional view thereof, and FIG.
FIG. 6 is a plan sectional view of the main part, and FIG. 6 is a side view of the main part of another example. Symbols in the figure, 10 is a storage tank, 11 is a granular material feeding device, 19
Is a grooved roll, 19a is a feeding groove, 20 is a fork roll, 2
Reference numeral 0a is a fork, 21 is a gear, 22 is a roll drive shaft, 24 is a manual rotation shaft, 26 is a pinion gear 26, 28 is a safety clutch.

Claims (1)

[Claims] 1. A grooved roll 19 having a feeding groove 19a formed in a peripheral surface thereof at a lower portion of a storage tank 10 for storing seeds and granular fertilizer particles, and sliding by fitting into the groove 19a. A roll roll consisting of a fork roll 20 having a free fork 20a is rotatably mounted on one shaft, and one roll is transmitted and rotated.
The other roll is rotatably engaged with a screwed gear 21 and the roll is axially moved left and right by the forward and reverse rotations of the gear 21 to change the effective groove length of the grooved roll 19 to form a granular material. The granular material feeding device 11 for adjusting the feeding amount of the granular material feeding device 11 is provided with a plurality of the granular material feeding devices 11 in the left-right direction which is the axial center direction of the roll drive shaft 22, and the gear 21 of each of the granular material feeding devices 11 is provided.
In an adjusting device capable of adjusting the feeding amount of all the granular material feeding devices at once by meshing with a pinion gear 26 attached to a single manual rotation shaft 24, when a rotation resistance of a predetermined value or more is applied to the gear 21. A safety device in a granular material feeding device, which is provided with a safety clutch 28 for interrupting the rotation of the gear 21 between the rotary shaft 24 and the gear 21.