JP2023081201A - walk-behind cultivator - Google Patents

Abstract

To facilitate a steering operation in the tilling work in a walk-behind cultivator.SOLUTION: A walk-behind cultivator is provided with left/right operating handles 17L, 17R toward left/right rear beyond a tilling device 7 attached to the rearward of a machine body 1. In the walk-behind cultivator, an auxiliary operating handle 27 capable of adjusting a vertical height is provided in the rear upper part of the operating handles 17L, 17R, the auxiliary operating handle 27 is made as a portal type, both side ends thereof are pivoted in a turning manner to the left/right operating handles 17L, 17R by using a mounting bracket 22 fixed to the operating handles 17L, 17R, and further, one end of the auxiliary operating handle 27 is connected to one operating handle 17L, 17R corresponding to the one end in an inclination change-adjustable manner by using an angle adjuster 24.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a walk-behind cultivator that has a cultivating device provided at the rear of the machine body and that is operated by an operator by gripping an operation handle provided extending to the rear of the machine body.

As described in Japanese Patent Laid-Open No. 2016-222053, the walk-behind cultivator is provided with an operation handle facing rearward from the machine body provided with the tillage device, and the operator operates the operation handle while following and walking behind the machine body. Steer.

JP 2016-222053 A

When cultivating ridges in a field with a walk-behind cultivator, the machine is driven along the ridges and the cultivator is used to cultivate the ridges. While holding the operation handle, operate the vehicle as if it were running.

For this reason, the operating handle may be separated from the operator or positioned too low, making it difficult to reach and operate the machine.

An object of the present invention is to make it easier to operate such a walk-behind cultivator in tillage work.

The above problems of the present invention are solved by the following technical means.

The invention of claim 1 is a walk-behind cultivator provided with left and right operation handles 17L and 17R facing left and right rear beyond a tillage device 7 mounted on the rear part of the machine body 1. The walk-behind cultivator is characterized in that it is provided with an auxiliary operation handle 27 whose height can be adjusted.

The invention of claim 2 is
The auxiliary operation handle (27) is gate-shaped, and both ends thereof are rotatably supported on the left and right operation handles (17L, 17R) by mounting brackets (22) fixed to the operation handles (17L, 17R). Further, one end of the auxiliary operation handle (27) is connected to one of the steering handles (17L, 17R) corresponding to one end so that the inclination can be changed by the angle adjuster (24). The walk-behind cultivator according to claim 1.

According to the third aspect of the invention, the mounting brackets 22 fixed to both ends of the operating handles (17L, 17R) are used as tubular bosses, and both ends of the auxiliary operating handle 27 are inserted into the tubular bosses 22a, and the tubular bosses 22a are inserted. The walk-behind cultivator according to claim 1, characterized in that the auxiliary operating handle (27) is pushed out and biased by the inner biasing member (30).

According to the fourth aspect of the present invention, an emergency stop switch 28 for stopping the engine 15 is provided on the grip portion 27a of the auxiliary operating handle 27. Use it as a cultivator.

According to the invention of claim 5, the side of the base handle 17b fixed to the machine body 1 and the side of the tip handle 17s are connected by a parallel link 32 so as to be able to move laterally in parallel to constitute the left and right operation handles 17L and 17R, and the tip handle 17s. The walk-behind cultivator is characterized in that the parallel link 32 can be fixed at a position where the is moved sideways.

In the sixth aspect of the invention, a rotary rear cover 37 is provided at the rear portion of the rotary cover 8 covering the upper portion of the tillage tines 6 of the tillage device 7, and a ground leveling plate 35 is provided on the ground surface side of the rotary rear cover 37, and the ground leveling plate 35 4. The walk-behind cultivator according to any one of claims 1 to 3, further comprising a ground leveling weight 36 capable of adjusting ground contact pressure.

In the invention of claim 1, when the walk-behind cultivator is moved on the road, the left and right operation handles 17L and 17R are gripped and the rear part of the machine is steered while walking. In this case, the operation can be facilitated by gripping the auxiliary operation handle 27 adjusted to a height that the operator can easily reach while walking along the rear side of the machine body 1 .

In the invention of claim 2, the auxiliary operation handle 27 rotates back and forth at the pivotal support portion of the mounting bracket 22 to the left and right operation handles 17L and 17R to change the inclination and fix the mounting angle with the angle adjuster 24, whereby the auxiliary operation can be performed. The steering wheel 27 is at a height position at which it is easy to operate, and stable steering operation can be performed.

According to the invention of claim 3, in addition to the effect of claim 1, by pushing down the grip portion of the auxiliary operation handle 27, it is possible to make fine adjustments to the optimum operation height.

In the invention of Claim 4, in addition to the effect of any one of Claims 1 to 3, when it is necessary to suddenly stop traveling, the emergency stop switch can be operated while gripping the grip portion 27a of the auxiliary operation handle 27. 28 can be operated to stop the aircraft from traveling, so it can be dealt with quickly.

According to the fifth aspect of the invention, if the tip handle 17s is moved left and right with respect to the base handle 17b by the parallel link 32 and fixed, the tip handle 17s can be moved when the operator is positioned on the left and right sides of the machine body 1. It can be operated by holding it with both hands, and the operator's operating posture is stabilized.

According to the invention of claim 6, the ridges plowed by the tilling tines 6 of the cultivator 100 are leveled by the soil leveling plate 35 of the rotary rear cover 34, making it easier to transplant seedlings in the post work, and the soil leveling weight 36 is grounded. By adjusting the pressure, the leveling of the leveling plate 35 can correspond to the hardness of cultivated soil.

1 is a perspective view of an operating handle according to an embodiment of the present invention; FIG. FIG. 4 is a perspective view of an auxiliary operating handle according to another embodiment of the invention; FIG. 4 is a perspective view of an auxiliary operating handle according to another embodiment of the invention; FIG. 4 is a cross-sectional perspective view of an auxiliary operating handle according to another embodiment of the present invention; (A) and (B) are perspective views of a cultivator according to another embodiment of the present invention. It is a perspective view of the rotary cover of the embodiment of the present invention. 1 is a perspective view of a leveling weight according to an embodiment of the present invention; FIG. FIG. 3 is a perspective view of a cultivator according to another embodiment of the present invention; It is a left view of the cultivator of a conventional example. FIG. 10 is a plan view of a conventional operating handle; It is a left view of the operating handle of a conventional example. It is a left view of the transmission case of a conventional example.

Hereinafter, the configuration and operation of the walk-behind cultivator of the present invention will be described with reference to the drawings.
First, the schematic configuration of a conventional walk-behind cultivator will be described, and then the characteristic configuration of the present invention will be described.

9 is an overall left side view of a conventional walk-behind cultivator, FIG. 10 is a plan view of an operating handle portion of the conventional walk-behind cultivator, and FIG. 11 is a left side view of the conventional operating handle portion. . Moreover, FIG. 12 is a schematic right side view of a conventional transmission case.

As shown in FIG. 9, the machine body 1 of the cultivator 100 includes a transmission case 2 formed in a substantially V-shape in side view, a support frame 3 provided on the front side of the transmission case 2, and the like. Of these, an axle 4 is protruded from the lower part of the front case 2a of the transmission case 2 to support left and right traveling wheels 4L and 4R, and a tillage shaft 5 is protruded from the lower part of the rear case 2b to hold tillage tines 6, 6, . . . The cultivating device 7 is constructed by providing the

The upper surface of the cultivator 7 is covered with a rotary cover 8 and the rear surface thereof is covered with a rear cover 9 . A resistance rod holder 10 is provided on the rear end side of the rotary cover 8, and a resistance rod 11 is connected and held so as to be adjustable in height. A tail wheel holder 12a is integrally connected to the resistance bar holder 10, and a tail wheel 13 is provided so as to be vertically adjustable.

An engine 15 is provided on the support frame 3, and the engine output is transmitted to the transmission mechanism inside the mission case 2 via a belt transmission mechanism. A belt cover 16 covers the belt transmission mechanism. A fuel tank 19 is provided above the engine 15 .

A base portion of an operation handle 17 is attached to the upper portion of the transmission case 2. The operation handle 17 is provided obliquely upward to the rear and is formed in a loop shape in a plan view (see FIG. 10). Reference numeral 18 denotes a main clutch lever, which can be interlocked with the on/off operation of the main clutch in the belt transmission mechanism 200 by vertically rotating around the first horizontal shaft 18a (see arrow α in FIG. 9). When the operator pushes down the main clutch lever 18 so that it overlaps with the grip portion 17a of the operating handle 17, the main clutch is "engaged", and when the operator releases the main clutch lever 18, the main clutch lever 18 is engaged by the return biasing force of a spring (not shown). This is a configuration in which the clutch is "disengaged".

The driving force from the engine 15 is transmitted to both the axle 4 and the tillage shaft 5 when the main clutch is "on", and is not transmitted to both the axle 4 and the tillage shaft 5 when the main clutch is "disengaged". is.

Further, on the right side of the transmission case 2 of the cultivator 100, there is a parking brake mechanism that can be interlocked with the operation of the main clutch lever 18 for engaging and disengaging the main clutch and that can reliably lock the drive shaft of the traveling system. is provided.

In the cultivator 100, the right side of the grip portion 17a of the operation handle 17 is provided with a rotary clutch and a differential lock clutch that can be engaged and disengaged by turning up and down around the second horizontal shaft 20a (see arrow β in FIG. 9). A rotary differential lock clutch lever 20 that can be interlocked is provided. Here, when the main clutch is "on", the driving force from the engine 15 is basically transmitted to the tillage shaft 5 when the rotary clutch is "on", and is transmitted to the tillage shaft 5 when the rotary clutch is "off". It is a configuration that does not transmit to When the differential lock clutch is "on", the left and right running wheels 4L, 4R are differentially locked (that is, the differential function is stopped). is activated).

Here, the differential function is a function that creates a difference in rotation speed between the inner wheels and the outer wheels when the cultivator 100 makes a U-turn, for example. . When the differential function is activated, the cultivator 100 turns smoothly.

Next, each embodiment of the present invention will be described.

FIG. 1 is a perspective view showing the operation handle 17 of the present invention. The operation handle 17 is left and right operation handles 17L and 17R that are extended rearward and upward on the left and right sides. An auxiliary operating handle 27 is provided. The ends of the auxiliary operating handle 27 are rotatably pivoted by pins 23 to mounting brackets 22, 22 provided on the left and right operating handles 17L, 17R. Further, a pin fastener 24b is fixed to the mounting bracket 22 for the left operating handle 17L, and on the side of the auxiliary operating handle 27, an arc locking element 24a provided with a plurality of mounting holes is fixed, and the pin fastener 24b and the arc locking element are fixed. The angle adjuster 24 is configured with the tool 24a, and by passing a lock pin through one of the plurality of mounting holes, the standing angle of the auxiliary operation handle 27 can be changed and fixed. Incidentally, the angle adjuster 24 can also be configured so that the standing angle can be changed steplessly by using a chronograph seat lock and a tightening screw.

The auxiliary operation handle 27 is steered by the operator's hand while walking along the ridge, and the standing angle of the auxiliary operation handle 27 can be changed to a height that is easy to operate. When the cultivator 100 is to be driven on the road, the cultivator 100 is steered while walking on the rear portion of the machine body 1 by gripping the grip portions 17a of the left and right operation handles 17L and 17R.

FIG. 2 shows another embodiment of the auxiliary operation handle 27, in which the horizontal lateral portion is bent downward and an emergency stop switch 28 is attached to it so that the engine 15 can be stopped in an emergency so that the cultivator 100 can be stopped. do.

3 and 4 show another embodiment for mounting the auxiliary operating handle 27. The mounting bracket 22 is a tubular boss 22a, and both ends of the auxiliary operating handle 27 are inserted into the tubular boss 22a. A compression spring, which is a biasing member 30, pushes and biases the auxiliary operation handle 27. As shown in FIG. Therefore, if the auxiliary operating handle 27 is too high, it can be pushed down and used at the optimum height.

5A and 5B show another embodiment of the operation handle, in which a tip handle 17s curved in a gate shape is attached to the rear end of the left and right base handles 17b on the body 1 side via a parallel link 32, and the tip handle 17s is can be moved and fixed to the left and right of the body 1, and the parallel link 32 is fastened and fixed at the link rotating portion. Hooks 34 for hanging a rope are provided on the left and right sides of the left and right base handles 17b, and are used when the cultivator 100 is transported by a truck. With this configuration, when the tip handle 17s is brought close to the operator's side during plowing work of the ridge, the operator can operate the machine without taking an unreasonable posture.

6 and 7 show an embodiment in which a rotary rear cover 37 is attached to the rear side of the rotary cover 8. A leveling plate 35 made of an iron plate is attached to the ground side at the rear end of the flexible rotary rear cover 37, A leveling weight 36 is attached to the upper side thereof with a rotary rear cover 37 interposed therebetween.

The leveling plate 35 is a tank for storing water, and the leveling pressure can be changed by opening the lid 36a to change the amount of water to be stored.

FIG. 8 shows a configuration in which a front side support device is provided at the lower portion of the support frame 3 of the machine body 1, and a ground rod 67 is provided on a mounting rod 65 facing downward with an adjusting hexagonal nut 66 so that the height can be adjusted, and the cultivator 100 is stabilized. to stop it. A grounding bar 67a is welded to the tip of the grounding rod 67 to change the grounding direction to the front, back, left and right.

1 Airframe 7 Tillage device 15 Engine 17b Base handle 17s Tip handle 17L Left operation handle 17R Left/right operation handle 22 Mounting bracket 22a Cylindrical boss 24 Angle adjuster 27 Auxiliary operation handle 27a Grasp 28 Emergency stop switch 30 Biasing member 32 Parallel link

Claims (6)

In a walk-behind cultivator provided with left and right operation handles (17L, 17R) toward the left and right rear beyond the tillage device (7) mounted on the rear part of the machine body (1), the operation handles (17L, 17R) are vertically and upwardly rearwardly positioned. A walk-behind cultivator comprising an auxiliary operating handle (27) capable of adjusting height. The auxiliary operation handle (27) is gate-shaped, and both ends thereof are rotatably supported on the left and right operation handles (17L, 17R) by mounting brackets (22) fixed to the operation handles (17L, 17R). Further, one end of the auxiliary operation handle (27) is connected to one of the steering handles (17L, 17R) corresponding to one end so that the inclination can be changed by the angle adjuster (24). A walk-behind cultivator according to claim 1. Mounting brackets (22) fixed to both ends of the operation handles (17L, 17R) are used as tubular bosses, and both ends of the auxiliary operation handle (27) are inserted into the tubular bosses (22a) to form tubular bosses (22a). 2. The walk-behind cultivator according to claim 1, wherein the auxiliary operating handle (27) is pushed out and urged by the urging member (30) inside the cultivator. 4. A walker according to any one of claims 1 to 3, characterized in that an emergency stop switch (28) for stopping the engine (15) is provided on the grip portion (27a) of the auxiliary operating handle (27). type cultivator. The base handle (17b) side and the tip handle (17s) side, which are fixed to the machine body 1, are connected by a parallel link (32) that allows parallel movement to the left and right to form the left and right operation handles (17L, 17R), and the tip handle. A walk-behind cultivator characterized in that a parallel link (32) can be fixed at a position where (17s) is moved laterally. A rotary rear cover (37) is provided on the rear part of the rotary cover (8) covering the top of the tillage tines (6) of the tillage device (7), and a ground leveling plate (35) is provided on the ground surface side of the rotary rear cover (37). 4. The walk-behind cultivator according to any one of claims 1 to 3, further comprising a ground leveling weight (36) capable of adjusting the contact pressure of the ground leveling plate (35).

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