JP2002345387A - Walking-type self-propelled working implement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a walking-type self-propelled working implement such as a spreader designed to spread a fertilizer, agrochemical, seeds or the like on a farming field while traveling along ridges/furrows, securing its reasonable weight balance despite with a traveling frame structure of simple construction. SOLUTION: This walking-type self-propelled working implement such as a spreader which is mounted with an operative implement section such as a spreading unit on the machine body equipped with a steering handle having left and right grips and traveling wheels and is to operate while being self-propelled along ridges/furrows, has the following construction: a handle frame 9 is mounted on a frame 2 with a pipe material formed U-shaped-fashion when viewed from the top and a reinforcing member placed as appropriate between left and right spacing members facing on each other, these frames 2 and 9 are equipped with the front wheel 3 as the driving wheel, a battery and a transmission motor are mounted in front of the front wheel 3, and the operative implement such as the spreading unit 5 is mounted between the front wheel 3 and the handle frame 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a walking type self-propelled work machine such as a spreader which spreads fertilizers, chemicals, seeds, and the like on a field while traveling on a levee. Attempt to ensure a reasonable weight balance while still there.

[0002]

2. Description of the Related Art Conventionally, there is a spraying machine configured to spray a medicine from a spraying pipe to a field scene while running on a ridge of a field.
For example, Japanese Utility Model Publication No. Hei.
No. 46930 discloses an example. Among them, the former is a form in which the U-shaped front frame is projected forward of the gantry to support the front wheels, and the handle frame is mounted on the gantry. In the latter configuration, a frame is formed in a U-shape, a support frame is erected on the rear portion of the frame, a spreader is mounted between the frame and the support frame, a front drive wheel is supported in front of the frame, and a steering is performed on the support frame. It is a structure to attach a handle.

[0003]

Therefore, in the former, since the front frame is mounted via the gantry, the wheel support structure tends to be poor. In the latter case, a front wheel support frame is required separately, and the handle frame must be extended rearward,
The strength of the handle frame itself is required.

After all, the structures disclosed in these publications complicate the left and right frame portions, and the mounting structure of the handle frame is also complicated.

[0005]

The present invention has been made to solve the above-mentioned drawbacks, and has taken the following technical means. That is, the invention according to claim 1 is a spraying machine that includes a steering wheel having grips on left and right sides, and a work machine unit such as a spraying device is mounted on an airframe equipped with running wheels, and works while traveling on a ridge by itself. An iso-walking type self-propelled working machine, in which a pipe material is formed into a U-shape in plan view, and a handle frame 9 is mounted on a frame 2 in which a reinforcing member is appropriately disposed between opposing left and right spaces. 9, a front wheel is provided as a driving wheel among running wheels including a front wheel 3 and a rear wheel 4, and a battery and a transmission motor are mounted in front of the front wheel 3;
And the like are mounted between the front wheel 3 and the handle frame.

[0006] Accordingly, the reinforcing member for connecting the left and right sides based on the framework of the frame and the handle frame can maintain appropriate strength and can simplify the frame structure. In addition, a battery and an electric motor are arranged in front of the driving front wheel, and a work implement is mounted between the handle frame and the rear side. Therefore, when operating with the steering handle at the upper end of the handle frame. And the front-rear balance is good, and the back-and-forth movement about the center of the drive shaft can be performed lightly.

According to a second aspect of the present invention,
Behind the front wheel 3 and near the base of the handle frame,
A non-drive rear wheel 4 having a smaller diameter than the front wheel 3 and a smaller ground contact width is provided. As a result, since the installation width on the non-driven rear wheel side is reduced, swinging in the lateral direction of the aircraft due to picking up irregularities on the ridge surface is reduced, and stable traveling is possible in combination with the above-mentioned weight balance. .

According to a third aspect of the present invention, the shaft 3a of the front wheel 3 is pivotally supported above the frame 2. As a result, the frame height can be set low even for the large-diameter drive front wheels, and the frame indication structure for the small-diameter rear wheels is simple.
Of course, the position of the frame 2 can be lowered as much as possible, the position of the center of gravity of the machine can be lowered, and the running stability can be improved.

[0009]

According to the first aspect of the present invention, the battery and the electric motor are arranged in front of the driving front wheel, and the working machine is mounted in the rear between the handle frame. Accordingly, the front-rear balance when operating with the steering handle at the upper end of the handle frame is improved, and the back-and-forth movement around the drive shaft can be performed lightly.
In addition, a battery and an electric motor are arranged in front of the driving front wheel, and a work implement is mounted between the handle frame and the rear side. Therefore, when operating with the steering handle at the upper end of the handle frame. And the front-rear balance is good, and the back-and-forth movement about the center of the drive shaft can be performed lightly.

According to the second aspect of the present invention, since the installation width on the rear side of the non-driven rear wheel is reduced, swinging in the lateral direction of the body due to picking up irregularities on the ridge surface is reduced, and the weight balance is reduced. In addition, stable running is possible. According to the third aspect of the invention, the frame height can be set low even for the large-diameter drive front wheel, the frame pointing structure with the small-diameter rear wheel is simple, and the position of the frame 2 can be lowered as much as possible. In addition, the position of the center of gravity of the machine can be configured to be low, thereby improving running stability.

[0011]

Embodiments of the present invention will be described with reference to the drawings. FIGS. 1 to 3 show a self-propelled medicine spraying machine as an example of a walking-type self-propelled work machine, which is of a walking type in which powdery medicine is sprayed on a field. This walking type spreader 1
Is formed of a pipe material having a circular cross section into a U-shape in plan view, and a front wheel 3
And a traveling wheel composed of a rear wheel 4, a spraying device 5 for diffusing the powdery and granular medicine and spraying it on the field, and a steering handle 6 at the rear end.
It is comprised including. That is, the front part of the frame 2 is formed so as to present a slightly upward angle when viewed from the side, the lower part on the front side is connected by a sled plate 7 also used as a reinforcement, and the rear part is a mounting plate 8 used as a reinforcement for mounting the spraying device 5. The left and right are connected by. The left and right rear portions of the frame 2 are bent substantially upward, and the handle frames 9, 9 left and right are slidably fitted up and down in this bent portion, and are fixed so that the vertical position can be adjusted by appropriate fixing means. The handlebars 9, 9 that rise substantially vertically are formed by bending the upper end gripping portions 6L, 6R side rearward. Shaft supports 10 and 10 are formed on the upper surface of the frame 2 near the center of the frame 2 in the front and rear directions to support the shaft 3a of the front wheel 3. The rear end of the frame 2 is provided with shaft support portions 11 on its lower surface to support the rear wheel 4.

On the upper surface of the sled plate 7 at the front part of the frame 2, a pair of left and right side plates 12, 12 are erected.
An electric motor 14 is fixed in a space surrounded by a battery mounting plate 13 having a substantially horizontal plane supported by the motor and a small-diameter gear 14a of the motor shaft and a large-diameter gear 3b on the front wheel shaft 3a side are interlocked by a chain 15. The front wheel 3 can be driven. 16 is a chain cover.

The electric motor 14 is configured to rotate and interlock with a battery 17. Between the two, an operation switch 18 serving as a body traveling operation means for controlling the rotation and stopping of the electric motor 14, and an electric switch for switching the forward / backward movement of the body. A forward / reverse switch 19 for the motor 14 and a rotation control dial 20 for controlling the number of revolutions of the electric motor 14 for adjusting the traveling speed are configured. Among them, the actuator of the operation switch 18 is configured as a pair of left and right. These actuators 18
L and 18R are formed in the form of a lever along the lower side of the handle grips 6L and 6R. The electric motor 14 is turned on when the fingers are engaged with the handle and approached to the grip, and off when released. And the electric motor 14 is turned off. The left and right actuators 18L,
The switches by 18R are in a so-called parallel connection state, and when one of them is turned on, the electric motor 14 is started, and when both are turned off, the electric motor 14 is stopped. Further, the forward / reverse switch 19 and the rotation control dial 20 are arranged on the surface of the operation panel 21 near the grips 6L, 6R and connecting the handle frames 9, 9 left and right. Among them, the rotation control dial 20 is provided in a position close to the right grip 6R in the form of a volume, and is a position where a hand operation while holding the grip 6R is easy.

Reference numeral 22 denotes a remaining amount indicator which indicates the remaining amount of the battery by displaying a row of LEDs, and prompts the battery to be charged. With the above configuration, the worker holds the control handle 6 and travels along the levee of the field while walking to spray the medicine on the field such as a paddy field.

The front wheel 3 is formed by a pneumatic tire having a slightly wide ground contact surface, and is provided at a position slightly forward from the center in the front-rear direction of the body due to the above-described support structure. This tire is configured as a low-pressure tire while its side wall is thickly formed, and is configured to mainly support the load by tilting in the left-right direction. or,
The rear wheel 4 is provided to be freely rotatable on the shaft portion, and is made of resin and has a diameter smaller than about one half to one third of the diameter of the front wheel 3, and is smaller than the front wheel 3 ground width m. It is formed with a narrow ground contact width n. Accordingly, the relationship between the ground contact portion formed by the front wheel 3 and the ground contact portion formed by the rear wheel 4 is a relationship between the base portion and the apex portion of the triangle in a plan view. Therefore, the rear wheel 4 is not easily affected by the unevenness of the ground, and the narrow width specification of the rear wheel 4 makes it difficult to pick up the unevenness of the ridge surface, stabilizes the posture, and enables stable running with both wheels.

Further, since the front wheels 3 are formed with the shaft supporting portions 10, 10 on the upper surface of the frame 2 with respect to the frame 2, the height of the frame 2 is not increased even if a wheel having a large diameter is mounted. The height of the frame 2 can be maintained at a low height in combination with the small-diameter rear wheel 4, and the weight center of gravity of the machine can be set low even when a work machine such as a spraying device is installed, thereby ensuring stable running.

Reference numeral 23 denotes a U-shaped stand supported by the rear wheel 4 axle.
It is a configuration that can lift and support the side. Reference numeral 24 denotes a spring which switches and holds the operating posture and the non-operating posture. On the side surface of the front wheel 3, the scraper 2
5, 25 are fixedly provided. This scraper 25,
25 is the distance A on the side side by scraping off the mud of the front wheel 3
It is possible to guide the discharge in a distant state, and the subsequent rear wheel 4 is not scraped off and runs on the accumulation of mud, so that stable running is ensured. In addition, among the scrapers 25, 25,
The drive chain case may be omitted if the case itself functions as a scraper.

Reference numerals 26 and 26 denote auxiliary frames provided in parallel between the battery mounting plate 13 and the rear sprayer mounting plate 30 in the left and right direction, and a storage box (not shown) for storing a medicine bag or the like. It is provided for engaging and supporting.
The spraying device 5 is configured between the spraying device mounting plate 30 erected on the rear portion of the front wheel 3 of the frame 2 and the handle frames 9, and is provided in a fan case 31 and the fan case 31. It is configured to include a fan (not shown), an engine 32 that rotates and cooperates with a fan shaft, a medicine hopper 33, a medicine transfer pipe 34, a spray pipe 35, and the like. The fan case 31 on which the medicine hopper 33 is placed and fixed is provided so as to be detachable and disassembled with a pair of front and rear monaca, but the bracket 30 is attached to the mounting plate 30 with the fan shaft directed in the front and rear direction.
a. An engine 32 that is directly connected to the fan shaft is mounted on the rear surface of the fan case 31.

The medicine transfer tube 34 is a sheet metal or resin connection tube 34a fixed in a vertical position to a horizontal frame 9a connecting the handle frames 9, 9 to the left and right, the fan case 31 and the connection. And a bellows-like flexible tube portion 34b connecting the tube 34a. The spray tube 35 includes a long spray tube portion 35a having a large number of holes for ejecting a medicine, a bent tube portion 35b at the base, and a bellows-like flexible tube portion 3 connecting these.
5c, of which the bent tube portion 35b is fitted to the upper end of the intermediate connection tube 34a so as to be pivotable about the vertical axis (a).

A ring-shaped member 36 is integrally mounted on the outer periphery of the bent tube portion 35b, and a turning operation lever 37 which can be turned in a horizontal direction is provided. The operation lever 37 is provided at a substantially symmetrical position so as to extend in a direction opposite to the direction in which the spray tube 35 extends, and by operating the lever 37, the direction of the spray tube 35 can be constantly swiveled about the vertical axis (a). Configuration. Note that this vertical axis (a) is located at a substantially middle position on the left and right of the width of the handle frame 9 and
Numeral 7 indicates that the position of the steering handle 6 can be changed in the leftward direction by passing the vicinity of the grip 6R of the steering handle 6 near the gripper 6L and passing the vicinity of the gripper 6L from the rightward direction.
Is changed from the leftward direction to the rightward direction through the forward direction of the machine body that rotates above the medicine hopper 33. In the present embodiment, the direction is controlled by grasping the hand by a worker as necessary without forming a means for restricting the rotation of the turning operation lever 37.
A restriction mechanism in the form of a braking plate or a ratchet may be appropriately formed.

A second ring-shaped member 38 is fixed to the upper part of the bent tube portion 35b. The member 38 is provided with a bracket 39 which is provided with an elevation angle adjustment lever 40 which can arbitrarily adjust the vertical rotation angle, that is, the elevation angle from the horizontal state to the plus side and the minus side. A seesaw-shaped interlocking link 41 in which the lever 40 is continuously provided is provided.
The refraction link 42 included in the scatter pipe portion 35a is suspended. Thus, when the elevation angle adjusting lever 40 is turned up and down, the vertical angle (elevation angle) of the spray tube 35 can be arbitrarily changed from the horizontal state to the plus side and the minus side. The bracket 39 is provided with a braking means (not shown) for maintaining the elevation angle. 43 is a link connecting the bracket 39 and the turning operation lever 37,
7 and the elevation angle adjustment lever 40 can be in the same phase without changing the vertical positional relationship, so that the worker who frequently holds the grip portion of the turning operation lever 37 can smoothly shift to the elevation angle adjustment lever 40 and operate. Is easy.

The medicine hopper 33 is capable of accommodating a maximum of 24 kg of a powdery medicine and is made of translucent resin.
3 can be checked. The scatter tube 35 has a predetermined length as in the present embodiment.
Is set slightly upward and can be released from the ridge side. In addition, 20m, 30m, 40m, 50m,
Several lengths such as 55m and 60m,
It is designed to be used according to the size of the field and the like.

An accelerator lever 45 is arranged near the left grip 6L of the steering handle 6 so that the rotation of the accelerator lever 45 can change the number of revolutions of the engine 32. 31
It is configured to change the rotation speed of the fan inside. Further, an opening adjustment lever 46 is provided on the mounting plate 30 of the spraying device 5, and a shutter (not shown) below the medicine hopper 33 is rotated by operating the lever 46 so that the inside of the medicine hopper 33 is rotated. The area of the drop port of the medicine is changed.

Next, a method of spraying the medicine to the paddy field in the walking type sprayer 1 will be described. When the rice seedlings are transplanted or the seeds are directly sowed and the chemicals are sprayed on the paddy field where the seedlings have been grown to a predetermined size, the changeover switch 18 is operated to drive the front wheel 3 and along the ridge adjacent to the paddy field. The worker spreads the walking type spreader 1 forward while walking. Assuming that the paddy field spreads on the left side of the ridge, the operator operates the swivel lever 37 so that the spray tube 35 is positioned on the left hand side of the airframe, and tilts up and down necessary for spraying a desired range. The angle is set by the elevation adjustment lever 40.

Therefore, since the levers 37 and 40 are concentrated on the right side, the turning operation lever 37 is gripped with the right hand, and the left actuator 18L of the operation switch 18 is operated while holding the left grip 6L of the steering handle 6 with the left hand. The aircraft can be linked to running. Also, while running the aircraft,
The work can be performed with the right hand while correcting the rotational position and the elevation angle of the spray pipe 35 around the longitudinal axis (a), and there is no need to stop the machine every time, so that the work efficiency is remarkably improved.

Further, during the operation, the driving operation is carried out in such a state that the gripping portion of the steering handle 6 is always gripped by one hand and the turning operation lever 37 is gripped by the other hand, so that the driving operation can be performed with a good left-right balance. Become. Of course, since the actuators 18R and 18L of the changeover switch 18 are provided on the grip portion of the handle 6, respectively, regardless of whether the turning operation lever 37 is in the left or right state, the actuator 18R or 18R of the changeover switch 18 is operated by the opposite hand. Alternatively, 18L can be operated, and the operation is facilitated. When traveling on the levee, the front wheel 3 as a driving wheel and the rear wheel 4 as an auxiliary wheel rotate while touching the ground. Since the front wheel 3 uses a pneumatic tire, it is appropriate when traveling. The upper surface of the ridge can be rolled while maintaining the cushioning property of the ridge, and is hardly influenced by the unevenness of the upper surface of the ridge in combination with the narrow width of the rear wheel 4. Also, front wheel 3
Is configured as a pneumatic tire, so that the left and right width can be slightly widened while preventing the aircraft from falling to the side. That is, since the load falling to the side of the fuselage is supported by the thick side wall portion of the front tire, the flexural deformation of the side wall portion is reduced, and the tire is in a low pressure state to minimize the influence of the ridge unevenness as much as possible. While the wobble caused by the flatness of the tire itself can be reduced, the falling in the direction can be prevented.

Further, as shown in FIG. 2, the front wheels 3 as driving wheels are provided within the left and right widths of the spraying device 5 in a plan view, so that a necessary grounding load can be obtained on the front wheels 3 and the work can be performed. This can reduce the operation load when the operator lifts the steering handle 6 so that the aircraft body is tilted forward around the front wheels 3, and the lifting operation of the steering handle 6 can be easily performed. In addition, the body is hardly tilted left and right, and can run stably.

The sprayer 1 includes an electric motor 1 serving as a prime mover for the battery 17 and the front wheels 3 in order from the front side.
4, front wheel 3, spraying device 5, rear wheel 4
The heavy spraying device 5 is arranged between the front wheel 3 and the rear wheel 4 to stably support it, and the battery 17 and the electric motor 14 are arranged closer to the front wheel 3 as compared to the rear wheel 4. Therefore, it is possible to obtain a necessary ground contact load on the front wheels 3 which are the drive wheels, and the balance of the entire body is good.

The sprayer 1 has a configuration in which the medicine transfer pipe 34, the medicine hopper 33, and the battery 17 are sequentially arranged from the rear side with the medicine transfer pipe 34 positioned upward so that the upper ends thereof are sequentially lowered. The front view of an operator holding the steering handle 6 at the rear side of the aircraft is widened, the visibility of the front side of the aircraft is good, and the aircraft can be easily run at the center of the ridge.

To move the body backward, the forward / reverse switch 19 is switched to the reverse position, and the changeover switch 18
By operating the actuator 18L or 18R, the sprayer 1 can be moved backward, and the spraying operation can be performed while reversing the ridge. In addition, when the aircraft is steered left and right to correct the traveling direction of the aircraft during normal work, the steering handle 6 is operated left and right. At this time, when it is difficult for the aircraft to steer in the desired traveling direction, the operator can easily perform the steering operation by slightly lifting the steering handle 6 and operating left and right.

The adjustment of the amount of sprayed medicine will be described. The starter (not shown) is operated to start the engine 32, the fan (not shown) in the fan case 31 is rotated, and the opening adjustment lever 46 is controlled. When the shutter (not shown) at the lower portion of the medicine hopper 33 is opened by a required amount by the operation described above, the medicine is sprayed from the holes of the spray pipe 35 to the paddy fields. Then, when the spray is spread to the end of the paddy field, the shutter is closed to stop the spraying of the medicine, and the actuators 18L and 18R of the changeover switch 18 are released to stop the running of the sprayer 1.

At the time of the above-mentioned spraying operation, the traveling speed of the body is changed from 1.0 km / h or less to 2.0 km / h by the rotation control dial 20 according to the amount of spraying per unit area.
h is freely selected and set in a wide range exceeding h. In addition, even if the length of the spray tube 35 'mounted in a form of supporting and spraying a long spray tube on both sides of the ridge changes greatly, for example, from 20 m to 60 m, the medicine is applied to the field at an appropriate ratio. Can be sprayed. Similarly, when spraying different types of medicines, it is possible to cope with a change in an appropriate spray amount per unit area.

In the above embodiment, the rear portion of the frame 2 is bent upward and the handle frame 9 is attached to the vertical portion. However, as in another embodiment shown in FIG. The form in which the handle frame 50 is attached to the vehicle may be used. In this case, the handle main frame 5 is formed in a U-shape with a left-right space wider than the width of the frame 2.
A horizontal frame 50b having the same width as the width of the frame 2 is protrudingly provided on the left and right of the lower part of the frame 0a, and is fitted to the frame 2 so as to be adjustable in the front-rear direction, and can be fixed at an appropriate position by the fixing means 51. . In this configuration, a bracket 52 is provided below the handle main frame 50a, and the rear wheel 4 is mounted. Thereby, the longitudinal length of the machine can be adjusted, and the length can be set according to the longitudinal length of the work machine. Further, as described above, the handle frame 50 is configured to be attachable to and detachable from the front and back, and the width of the handle main frame 50a is made wider than the battery width.
If the width of the spraying device mounting plate 30 is formed within the width, the frame 2 and the handle frame 50 can be folded and combined as shown in FIG.

[Brief description of the drawings]

FIG. 1 is an overall side view showing a sprayer.

FIG. 2 is an overall plan view showing a sprayer.

FIG. 3 is a rear view showing the sprayer.

FIG. 4 is a side view of a frame according to another embodiment.

FIG. 5 is an exploded side view of a frame according to another embodiment.

[Explanation of symbols]

Reference numeral 1 denotes a chemical sprayer, 2 denotes a frame, 3 denotes a front wheel, 4 denotes a rear wheel,
5: Spraying device, 6: Steering handle, 9: Handle frame, 14: Electric motor, 17: Battery, 18: Operation switch (machine running switching means), 19: Forward / reverse switching switch, 31: Fan case, 32: Engine , 33: Drug hopper, 34: Drug transfer tube, 35: Spray tube

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Yoshihiko Kido, 1-Eight Hachikura, Tobe-cho, Iyo-gun, Ehime Prefecture, Iseki Agricultural Machinery Co., Ltd. Nobuhiro (72) Inventor Nobuhiro Ide 1-2-5, Kinuyama, Matsuyama-shi, Ehime Pref. Atex Corporation (72) Inventor Takeshi Yamashita 1-2-5, Kinuyama, Matsuyama-shi, Ehime Pref. Atex Corporation (72) Inventor Masaru Ojima 2-4-5 Nishi 2jo Minami 2-chome, Bibai, Hokkaido F-term (reference) 2B052 BC04 BC08 DA01 2B054 AA14 BA01 BB01 CA03 DA02 DA08 2B121 AA11 CB09 CB24 CB33 CB45 EA26 EA30 FA02 4D074 AA05 BB06 CC04

Claims (3)

[Claims] 1. A walking type self-propelling machine such as a spraying machine which includes a steering wheel having gripping portions on left and right sides and a working machine such as a spraying device mounted on an airframe equipped with running wheels, and works while self-propelling on a ridge. A work machine, in which a pipe member is formed into a U-shape in plan view, a handle frame 9 is mounted on a frame 2 in which a reinforcing member is appropriately disposed between gaps facing left and right, and front wheels 3 are mounted on the frames 2 and 9. And a front wheel is provided as a driving wheel, a battery and a transmission motor are mounted in front of the front wheel 3, and a working machine such as a spraying device 5 is provided between the front wheel 3 and the handle frame. A walking type self-propelled work machine equipped with it. 2. The walking-type self-propelled work according to claim 1, further comprising a non-driven rear wheel 4 having a smaller diameter and a smaller ground contact width than the front wheel 3 provided behind the front wheel 3 and near the base of the handle frame. Machine. 3. The walking type self-propelled working machine according to claim 1, wherein the shaft 3a of the front wheel 3 is supported at a higher position than the frame 2.