JPS6123966B2 - - Google Patents

Description

Detailed Description of the Invention The present invention provides power to cut tea leaves between a cutting blade on the front edge of the bottom plate of the machine frame and a cutting blade that engages with the cutting blade, and collect the leaves into a storage bag using pressure air from a blower. This relates to a tea leaf plucking machine.

Conventionally, in this type of plucking machine, the impeller of the blower and the drive pulley for driving the cutting blade were both directly connected to the output shaft of the engine.

For this reason, when trying to adjust the cutting speed of the cutting blade, the only option was to operate the throttle lever of the engine or adjust the diameter of the drive pulley.

However, according to the former, the rotation of the impeller changes greatly at the same time as the cutting speed of the cutting blade, and when decelerating, it greatly affects the tea leaf collection ability and also reduces the engine's maximum capacity. will not be used effectively.

Furthermore, the latter method requires a tool to adjust the diameter of the pulley, and has drawbacks such as a large gear ratio.

The present invention focuses on the phenomenon that when the intake port of the blower or the discharge port of the blower pipe is blocked, the engine speed naturally increases without any operation of the engine throttle lever or variable operation of the drive pulley diameter. By providing an opening adjustment device at the inlet or outlet of the tea plant and varying the area of the inlet or outlet, tea leaves can be picked at a cutting speed that is appropriate for the conditions of the tea plants that grow in clusters. be. Note that this phenomenon is considered to occur because the reduced blowing power is consumed as driving power for the cutting blade, which has a lower load.

Next, an embodiment in which the present invention is applied to a two-person portable system will be described with reference to the drawings.

1 is the air pipe that also serves as the bottom plate, 2 and 2' are the side plates,
3 is an upper plate, and 4 is a partition plate, which together form a machine frame with openings at the front and rear.

5, 5' are rotors on which rotary blades 6, 6' are fixed;
One end is attached to the side plates 2, 2', and the other end is attached to the partition plate 4.
It is connected to a bevel gear 4' fixed to the frame and rotates within the machine frame.

7 is a fixed blade fixed to the front edge of the bottom of the air pipe 1. 8
is an impeller 10 directly attached to the output shaft of the engine 9.
is a drive pulley with adjustable pulley diameter.

11 is a casing of the impeller 8, and an air outlet 11' of the casing communicates with the air pipe 1. 1
1'' is an inlet.

Reference numerals 12, 12, . . . designate a large number of discharge ports drilled in the blast pipe 1 at appropriate intervals, and the area of each discharge port can be adjusted by an opening adjustment device 13. That is, the opening adjustment device 13 moves the shutter plate 16, which has openings 14, 14... having the same shape and pitch as the discharge ports 12, 12... of the blower pipe, and a long hole 15 at one end, to the rear wall of the blower pipe. The shutter plate 16 is installed between the rails 17 and 17, and is inserted through the elongated hole 15 into a bolt 18 at one end of the rear wall of the blower pipe, and the shutter plate 16 slides left and right within the elongated hole 15 to open the discharge port. The area of 12, 12, . . . is varied and fixed at an appropriate position with a wing nut 19.

Reference numeral 20 denotes a speed reducer to which a transmission pulley 21 is fixed on the input side and drives the rotors 5, 5' on the output side.

A V-belt 22 is provided between the drive pulley 10 and the transmission pulley 21. 23 and 24 are handles on both sides of the machine.

Therefore, when the engine 9 is operated, the impeller 8
rotates and the pressure air is discharged from the outlet 12, 1 of the air pipe 1.
2... is discharged toward the storage bag at the rear of the machine frame.

On the other hand, the rotation is from the drive pulley 10 to the transmission pulley 2.
1. The tea leaves are transmitted to the reducer 20 and the rotors 5, 5', and the tea leaves are cut between the rotary blades 6, 6' fixed to the rotors 5, 5' and the fixed blade 7, and then passed through the outlet of the air pipe 1. 12,
The leaves are collected in the storage bag by the pressure air discharged from 12.

The rotational speed of the rotors 5 and 5' can be changed by changing the diameter of the drive pulley, but if you do not have the tools to do so, or want to change speed quickly, or if you want to change the speed wider, When necessary, the opening area of the discharge ports 12, 12, . . . of the blast pipe 1 can be increased or decreased by moving the shutter plate 16 to the right or left. That is, by increasing or decreasing the discharge port area, the blowing power load to the engine 9 is increased or reduced, so that the rotation of the engine 9 naturally increases or decreases. When the rotation of the engine increases or decreases, the rotation of the rotors 5, 5' similarly becomes high or low.

For example, when picking tea leaves that have a large number of buds and are relatively heavy, such as Ichibancha, the discharge ports 12, 12
If... is opened so that the maximum amount of air is discharged, a large amount of engine output is consumed as blowing power, so the rotation speed is suppressed, and eventually the rotor 5,
5' rotates at a low speed, there is no double or triple cutting caused by the high speed rotation of the rotor, and the tea leaves can be collected in good quality with no broken pieces.

In addition, in the case of the cutting process where the cut tea leaves are discarded between the tea furrows, there is no problem even if the tea leaves are cut into pieces.The condition of the tea furrow after harvesting, that is, even the cutting marks, is fine. Therefore, it is best to rotate the rotor at high speed and carefully cut the tea leaves.

In other words, in the case of cutting, there is no need to collect the tea leaves into the storage bag, so if the discharge ports 12, 12... are mostly closed, the air volume will be greatly reduced, and the rotors 5, 5' will rotate at high speed. This allows for tight cutting. Furthermore, at this time, the drive pulley 10
If the diameter of the blade is also varied, a wider range of gears can be achieved, and plucking can be done at the most suitable rotational speed.

The present invention is not limited to the above-mentioned portable type, but may be of the so-called self-propelled type or semi-self-propelled type as long as the blower and the cutting blade are driven by the same prime mover. , Sanbancha, etc., can be picked by the same operation with the rotor rotating at the optimum speed according to the properties of the fresh leaves.

Further, according to the present invention, the speed of the rotor can be changed by changing the area of the suction port 11'' of the blower.

In addition, the opening adjustment device 13 of the suction port or the discharge port
This is not limited to the shutter plate 16 of the above-mentioned embodiment, but in short, any type of type that can variably adjust the area of the opening can produce the same effect.

[Brief explanation of the drawing]

The figure shows the present invention applied to a two-person portable system.
Figure 1 is a front view, Figure 2 is a longitudinal side schematic diagram, and Figure 3 is a front view.
The figure is a schematic rear view of the blower pipe for explaining the opening adjustment device. 1...Air pipe, 5,5'...Rotor, 6,6'...
...Rotating blade, 7... Fixed blade, 8... Impeller, 9...
Engine, 10... Drive pulley, 11''... Suction port, 12, 12... Discharge port, 13... Opening adjustment device, 14, 14... Opening, 16... Shutter plate, 17, 17... Rail, 23, 24...handles on both sides.

Claims (1)

[Claims] 1. It is characterized by being equipped with an opening adjustment device that can freely set the suction port area of the blower or the discharge port area of the blower pipe communicating with the blower, thereby making it possible to freely change the cutting speed of the cutting blade. Powered tea leaf plucking machine.