JPH0856460A - Semimobile type plucking machine - Google Patents

Abstract

PURPOSE: To enable the changeover operation from advancing to backing while holding an operating handle and reduce the weight of a machine body. CONSTITUTION: This semimobile type plucking machine is obtained by adopting an advancing and backing changeover device comprising a tension changeover member 60 equipped with the first pulley 55 and the second pulley 56, rotated and driven in the mutual opposite directions by a power transmitted from an engine through a gear train, the third pulley 58 capable of selectively receiving the power from the first pulley 55 and the second pulley 56 and normally and reversibly rotating a speed change device and tension pulleys 61 and 62 capable of selectively changing over the belt transmission from the first and second pulleys to the third pulley and performing the changeover operation of the tension changeover member 60 by operating a travel operating lever installed in an operating handle of the body. Thereby, the changeover from advancing to backing of the machine body is carried out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a semi-self-propelled plucking machine equipped with a plucking device on a main body which runs between one ridges of tea tree ridges planted in rows.

[0002]

2. Description of the Related Art Conventionally, a front wheel contacting one of the ridges of a tea tree ridge planted in rows and a rear wheel driven by power are provided, and a main body operated by a first operator is provided on the main body. A semi-automatic device equipped with a plucking device, one end of which is pivotally supported and the other end of which is a free end side, is supported so that the plucking device can be moved vertically with respect to the main body, and can be moved left and right and the tilt angle can be adjusted horizontally. A traveling type tea leaf plucking machine is known, for example, from Japanese Utility Model Laid-Open No. 6-41425 filed by the present applicant. In this semi-self-propelled tea leaf plucking machine, an auxiliary handle attached to the free end side of the plucking device is carried by a second operator who is located between the other ridges of the tea ridge and moves while the main body travels to perform plucking. With the free end side of the device aligned with the center of the tea ridge, one half of the tea ridge is mowed in one stroke, and it is turned on the headland of the tea ridge and the other half is mowed on the return stroke. is there.

The traveling device in this conventional semi-self-propelled tea leaf plucking machine comprises a caster-like freely rotatable front wheel provided at the front part of the main body and a crawler device provided at the rear part of the main body. The power from the engine is transmitted to the drive wheels via a transmission or a transmission system, and the drive wheels drive the rubber crawlers. Then, switching between forward and backward movement of the machine body is performed by a shift lever provided in the transmission.

[0004]

In such a conventional semi-self-propelled tea leaf plucking machine as described above, a general gear transmission is adopted as the transmission, and one hand is operated from the steering handle when switching between forward and backward movement. It was necessary to operate the gear shift lever provided on the transmission separately from the gear. However, a semi-self-propelled plucking machine that has a traveling device only on one side of the tea tree ridge and no side car on the other side, always supports the steering handle with both hands to maintain the balance of the machine while traveling. It is necessary to operate with one hand released to switch between forward and backward movement, which tends to upset the balance of the machine body, resulting in a problem in workability.

In addition, a hydraulic continuously variable transmission (HS
T) It has been proposed to operate it by operating the steering wheel, but a hydraulic continuously variable transmission has poor transmission efficiency and requires a large engine, which increases the weight. There was a problem with the flight stability of the aircraft.

The present invention has been made in order to solve such a problem, and it is possible to perform a forward / reverse switching operation while holding a steering wheel, and a semi-self-propelled plucking machine having a lightweight body. It is intended to provide.

[0007]

In order to achieve the above object, the present invention comprises a main body equipped with a traveling device between one ridges of a tea tree ridge planted in rows, and the main body has one end portion. In a semi-self-propelled plucking machine equipped with a plucking device that is pivotally supported, and the free end side of the other end is moved up and down to adjust the tilt angle, the power from the engine mounted on the main body Has a transmission mechanism that transmits power from the forward-reverse switching device to the drive wheels of the traveling device through the transmission.The forward-reverse switching device is driven by the power from the engine through the gear train to rotate in opposite directions. A first pulley and a second pulley, and a third pulley that selectively receives power from the first pulley and the second pulley to rotate the transmission in forward and reverse directions;
And a tension switching member having a tension pulley for selectively switching the belt transmission from the second pulley to the third pulley. The tension switching member is switched by operating a traveling operation lever provided on a steering handle of the main body. It is characterized by doing.

[0008]

With the above structure, the power from the engine is transmitted to the first pulley and the second pulley via the gear train, so that the first pulley and the second pulley are rotationally driven in opposite directions. Then, by operating the traveling operation lever provided on the steering handle, the tension switching member including the tension pulley performs a switching operation to transmit the belt from the first pulley to the third pulley or the belt from the second pulley to the third pulley. Tension is selectively applied to the belt that is transmitted to. As a result, when tension is applied to the belt transmitted from the first pulley to the third pulley, the third pulley is driven in the normal direction, and the second pulley is rotated to the third pulley.
When tension is applied to the belt transmitted to the pulley, the third pulley is driven in reverse. Since the third pulley is connected to the input shaft of the transmission, the forward / reverse rotation is performed by operating the traveling operation lever to drive the transmission in the forward and reverse directions.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing the overall configuration of a semi-self-propelled plucking machine according to the present invention, and FIG. 2 is a front view thereof. 1 and 2
In Fig. 1, reference numeral 1 is a main body which is introduced into one of the ridges of the tea tree ridges planted in a row and which is operated by the first operator and has a narrow width and a long length. ,
A caster-shaped front wheel 2 is pivotally supported and an engine 3 is mounted. At the rear part of the main body 1, a crawler device 4 having a rubber crawler 41 and having a low height is provided. To the crawler device 4, the power input from the engine 3 to the transmission 6 via the forward / reverse switching device 5 to be described later and changed in speed and output is driven via the output sprocket 8, the chain 7, and the crawler side sprocket 9. It is transmitted to the wheel 42 and drives the rubber crawler 41 to run on its own. At the lower part of the main body 1, a stand 28 is provided so as to be displaceable between the position shown in FIG. 1 and the storage position that rotates rearward of the main body. Further, a throttle lever 29 of the engine 3 is provided on the steering handle 11.

A column frame 10 is erected at the center of the main body 1 in the front-rear direction, and a plucking device 14 is supported on the column frame 10 so that the plucking device 14 can be adjusted in vertical movement, lateral movement and tilt angle. Has been done. The plucking device 14 is provided with an auxiliary handle 15 at the end opposite to the main body, with the mounting seats 16, 1
The second operator, which is attached so as to be able to slide left and right (adjust the length) and adjust the vertical angle via 6, holds the auxiliary wheel 15 and the second operator holds one of the furrows in which the front wheel 2 and the crawler device 4 travel on the ground. Is located between the other ridges facing each other across the tea ridge, and the plucking work is performed while the main body 1 moves while moving.

The plucking device 14 is the same as a conventionally known tea leaf plucking machine, and is provided with paired side plates at both ends of the support frame 17, and is supported by curving in a tea tree ridge shape between the side plates. A cutting blade 14a composed of a hair clipper blade or a cylinder type rotary blade (a hair clipper blade is shown in the figure) is supported so as to reciprocate by a transmission power from a power source (not shown). In addition, a fan (not shown) is mounted by directly connecting the rotation shaft and the output shaft of the power source described above,
An air guide tube 14b is connected to the fan, and this air guide tube 1
A large number of nozzles 14c are projected from 4b, and the cutting blade 14a
Is arranged at a predetermined interval so that pressure air is blown from above toward the guide plate provided behind the cutting blade 14a to blow the tea leaves plucked by the cutting blade 14a backward. A tea leaf storage bag is attached to the rear of the guide plate to collect the cut tea leaves.

The column frame 10 is provided with an elevating body 26 having a roller for adjusting the vertical movement of the plucking device 14. A support rod 18 that extends vertically downward and is bent rearward is provided on the elevating body 26, and a left and right moving mechanism 70 described later is provided.
The plucking device 1 is attached to the end of the support rod 18 through the
The rotary support tube 19 of No. 4 is inserted and supported so as to be rotatable so that the inclination angle of the plucking device 14 can be adjusted.

The left-right movement adjusting mechanism 70 slides in the outer cylinder 72 without rotating inside the outer cylinder 72 fixed to the elevating body 26 and projects from one end side of the outer cylinder 72, and supports the projected one end. The inner cylinder 73 fixed to the rod 18 and the outer cylinder 7
2 is fixed to the end of a screw shaft that is screwed into the inner end of the inner cylinder 73 and rotatably supported on the other end of the outer cylinder 72. It is composed of a rotary knob 71 that is rotated. Then, by rotating the rotary knob 71, the inner cylinder 73 slides by the action of the screw shaft to move the support rod 18 left and right, and thus the plucking device 1
Move 4 to the left and right to adjust.

A motor cylinder 24 is provided at the upper end of the column frame 10, and the pulley 2 is provided between the motor cylinder 24 and the support rod 18 (elevator 26).
An up-down adjustment mechanism 30 for up-down adjustment of the plucking device 14 via 5, 26 and the wire 32 is configured. One end of the wire 32 is connected to the support rod 18, and its end is connected to the upper front part of the column frame 10. Then, the vertical adjustment mechanism 30 vertically adjusts the plucking device 14 by the expansion and contraction operation of the motor cylinder 25, and also controls the handle 11.
By rotating up and down, the wire connected to the handle support rod 31 is pulled back, and the plucking device 14 is adjusted up and down.

A support rod 18 is attached to the support frame 10 of the main body 1 via the above-described left-right movement mechanism 70, and the plucking device 14 pivotally supports one end of the support rod 18 so as to be rotatable. The tilt angle can be adjusted by vertically moving the free end side of the other end. Further, a tip end of a chain 22 which is moved by rotation of a motor 21 mounted on an upper portion of the support rod 18 is pivotally attached to an inclination adjusting shaft 20 fixed so as to be orthogonal to the support frame 17. The chain 22 is wound up and unwound by the forward and reverse driving of 21, and the plucking device 14 is tilted to adjust the tilt angle. Although the chain 22 is used as the linking member for inclining the plucking device 14, the linking member is not limited to this, and another linking member such as a wire may be used.

Further, one end of the resistor 27 is attached to the main body side and the other end is attached to the plucking device side so that the resistor 27 expands and contracts according to the tilting of the plucking device 14. This resistor 27 is
When the free end side of the plucking device 14 tilts so as to lower, no load acts, and only when the free end side of the plucking device 14 tilts so as to rise, a constant resistance force acts regardless of the tilt angle. . Here, even when adjusting the inclination angle of the plucking device 14, the adjusting mechanism operates without any problem by setting the resistor or the motor 21 so that the winding torque of the motor 21 is larger than the resistance of the resistor 27. Can be made. Then, by setting the resistance of the resistor 27 to be larger than the reaction force received by the plucking device 14 from the tea plant, after adjusting the inclination angle of the plucking device 14, the operator of the main body without an auxiliary operator. Even when only one person works, the inconvenience that the free end side of the plucking device 14 is pushed up by the reaction force received from the tea plant and the cutting height near the central portion of the tea plant becomes shallow does not occur. This resistor 2
7 is detachably mounted on the body side and the plucking device side.

The drive control of the motor cylinder 24 for vertically adjusting the plucking device 14 and the motor 21 for adjusting the tilt angle is performed by one adjustment switch 23 provided on the control handle 11. The adjustment switch 23 has an operation stick that is operated in four directions (front and rear, left and right) (cross direction). For example, by operating the operation stick to the left and right, the rotation of the motor 21 is rotated in the forward and reverse directions, and the inclination angle of the plucking device 14 is changed. Is adjusted, and the operation stick is moved back and forth to control the expansion and contraction of the motor cylinder 24 to vertically adjust the plucking device 14.

Next, the transmission mechanism in the semi-self-propelled plucking machine of the present invention will be described with reference to FIGS. 3 and 4. Engine 3
Power from the first gear 52 to the second gear 53 in the gearbox 63 and the second gear 53 through the centrifugal clutch 51.
It is transmitted from the gear 53 to the third gear 54. Then, the first pulley 55 is attached to the shaft of the second gear 53, and the second pulley 56 is attached to the shaft of the third gear. The first pulley 55 and the second pulley 56 rotate in different directions, and the belt 57a and 57b enable power transmission from the first and second pulleys to the third pulley 58, respectively. The power transmitted to the third pulley 58 is input to the transmission 6 as described above, and the output sprocket 8, the chain 7,
It is transmitted to the drive wheels 42 via the crawler side sprocket 9. Further, belt pressing members 59a and 59b are provided around the first, second and third pulleys to prevent the pulleys and the belt from rotating together.

At the tip of the third pulley 54, a tension switching member 60 is mounted by a bearing so as to be rotatable around the axis of the third pulley. Tension switching member 60
Has a T-shape on the lower side and has tension pulleys 61 and 62 attached to the left and right ends thereof, and has upper and lower parts bifurcated to the left and right ends 60a and 60b to which wires 13a and 13b are connected, respectively. ing. When the wire 13a is pulled, the tension switching member 60 swings to the left to give tension to the belt 57a, and when the wire 13b is pulled, the tension switching member 60 swings to the right to give tension to the belt 57b. By switching the tensions applied to the belts 57a and 57b, forward drive is performed when the power of the first pulley 55 is transmitted to the third pulley, and reverse drive is performed when the power of the second pulley 56 is transmitted to the third pulley. It will be driven.

The forward / backward switching operation is performed by the traveling operation lever 12 provided on the steering handle 11. Each of the wires 13 is provided on the traveling operation lever 12
a and 13b are connected to each other, and the wires 13a and 13b are selectively pulled by operating the lever to swing the tension switching member 60 to the left and right to switch the forward / backward switching device 5 to move forward / backward. Is switched.

Here, the engine 3 is equipped with a small and lightweight two-cycle engine in order to improve the balance of the machine body and improve maneuverability. Further, since a centrifugal clutch 51 is attached to the output shaft of the engine, the engine travels when the engine speed is increased, and stops when the engine speed is decreased. Since the two-cycle engine can run at a rotational speed of about 8000 rpm from the clutch-in rotational speed of the centrifugal clutch (about 3000 rpm), the throttle lever 29 can be operated continuously during that time, and the throttle lever 29 It is possible to run and stop just by operating. The transmission 6 is provided with a shift lever 33, and the neutral, high speed, and low speed can be switched by operating the lever.

Next, the traveling device will be described with reference to FIGS. First, FIG. 5 shows a front wheel device. The front wheel 2 is rotatably supported by a gate frame 83 with respect to a rotating shaft 83b, and the shaft portion 83a of the gate frame is rotatably attached to the front portion of the front wheel swinging member 82 via a bearing 82b. It is attached so that the direction of the front wheel 2 can be changed to the left or right. The front wheel swing member 82 includes a bolt 80 and a knob 81 that connect an opening 82a formed in the rear portion of the front wheel swing member 82 and an opening 1a formed in the front portion of the main body.
It is attached to the front part of the main body by a coupling screw 81 having a. Then, chrysanthemum seats 84a, 84b are formed in the mounting portion, and the coupling screw 81 is loosened to allow the chrysanthemum seats 84a, 84b to be removed.
By separating 84b, the swinging angle of the front wheel swinging member 82 in the horizontal direction can be arbitrarily selected, and by tightening the coupling screw in this state, the position of the front wheel is freely swinging in the horizontal direction with respect to the main body. Can be fixed. Therefore, even when the inclination angle of the plucking device 14 is changed, it is possible to adjust the position of the front wheel 2 according to the change and to keep the overall balance constant.

The crawler device will be described with reference to FIG. The crawler device 4 includes a drive wheel 42 that is driven by the power transmitted to the crawler-side sprocket 9 by the chain 7.
A rubber crawler 41 connecting the drive wheel 42 and the rotary wheel 43, and the crawler device is covered with a cover frame 44 from the upper side. The cover frame 44 covers the upper surface and the side surface of the crawler device 4.
The notch 45 is formed, and the upper portion of the rear rotating wheel 43 is open to the outside. As a result, even if the scraps and the like are wound up by the rubber crawler 41 during the work, they are not discharged to the outside from the notch portion 45 formed in the cover frame 44 and are not clogged in the cover frame 44.

[0024]

Since the present invention is constructed as described above,
The following effects are achieved. It is possible to switch between forward and reverse by simply operating the travel control lever provided on the steering handle, so the operator can easily switch between forward and backward while holding the balance of the aircraft with both handles. , Workability is improved.

Since a small and lightweight two-cycle engine can be used as the engine, the weight of the machine can be reduced and the steering stability can be secured.

[Brief description of drawings]

FIG. 1 is a side view showing an overall configuration of a semi-self-propelled plucking machine according to the present invention.

FIG. 2 is a front view showing the overall configuration of a semi-self-propelled plucking machine according to the present invention.

FIG. 3 is an explanatory diagram of a transmission mechanism in the semi-self-propelled plucking machine according to the present invention.

FIG. 4 is an explanatory diagram of a transmission mechanism in the semi-self-propelled plucking machine according to the present invention.

FIG. 5 is an explanatory diagram of a traveling device of the semi-self-propelled plucking machine according to the present invention.

FIG. 6 is an explanatory diagram of a traveling device of the semi-self-propelled plucking machine according to the present invention.

[Explanation of symbols]

 1 main body 2 front wheel 3 engine 4 crawler device 5 forward / reverse switching device 6 transmission 7 chain 8 output sprocket 9 crawler side sprocket 11 steering handle 12 traveling lever 13 wire 14 plucking device 51 centrifugal clutch 52 first gear 53 second gear 54 Third gear 55 First pulley 56 Second pulley 57a, 57b Belt 58 Third pulley 59a, 59b Belt pressing member 60 Tension switching member 61, 62 Tension pulley 63 Gear box 64 Bearing

Claims (1)

[Claims] 1. A main body equipped with a traveling device between one of the ridges of tea tree ridges planted in a row, one end of which is rotatably supported, and the other end of the free end side is rotatably supported. In a semi-self-propelled plucking machine equipped with a plucking device that can be moved up and down to adjust the tilt angle, the power from the engine mounted on the main body is transferred from the forward-reverse switching device to the drive wheel of the traveling device via the transmission. The forward / reverse switching device has a power transmission mechanism for transmitting power, and the power from the engine is transmitted through a gear train to be rotationally driven in opposite directions.
A pulley and a second pulley, a third pulley that selectively receives power from the first pulley and the second pulley to rotate the transmission in forward and reverse directions, and belt transmission from the first and second pulleys to the third pulley. And a tension switching member having a tension pulley for selectively switching between the two. The semi-self-propelled plucking method is characterized in that the tension switching member is switched by operating a traveling operation lever provided on a steering handle of the main body. Machine.