JPS62134001A - Manual operation type cultivator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a means-operated cultivator whose steering is carried out by means of a handle, and more particularly to a mechanism associated with a resistance bar for preventing over-advancement of the tiller rotor blades.

Prior Art Conventional commercially available means-operated cultivators are equipped with a resistance rod at the rear of the main body, and when the resistance rod is pushed into the ground, the resistance prevents the rotary tiller blades (power-driven) from advancing too far and allows the tiller to operate properly. The structure is such that it can be used for cultivation.

Since this resistance rod receives a large amount of resistance, it is usually firmly fixed to the tiller body in a position that allows it to stand on the ground. In addition, the vehicle is generally not equipped with wheels that may interfere with the resistance bar, making it extremely difficult to turn the vehicle when rolling. In addition, when carrying the product other than during tilling work, it is actually carried by hand by attaching removable wheels to the shaft of the rotary tiller blade after work.

Problems to be Solved by the Invention As mentioned above, manually operated tillers are indispensable for tilling work, but because they are installed to stand on the ground, they are difficult to move around in the undulations and in the four-way position. On the other hand, this can be a hindrance, and it is inconvenient to have to lift it when moving around or carrying it.

Also, for transportation, it would be better to equip it with wheels so that it can be operated by hand, but on the other hand, equipped with wheels is a technique that is incompatible with each other, as it goes against the purpose of cultivating the fields, and also causes interference with the resistance rods. There is a conflict.

In the end, the reality is that farmers are forced to take complicated measures such as removing the wheels when plowing and attaching the wheels when transporting.

The present invention cleverly solves the above-mentioned contradictory technical problems, and provides a wheel-based rolling function and a hand-pushing function for operations other than plowing work, as well as a resistance rod function during plowing, and rationalizes the balance of both machines without contradicting each other. The present invention provides a manually operated cultivator that achieves the following objectives.

Means for Solving the Problems The present invention solves the above problems by providing a pair of wheels and a resistance rod at the rear of the cultivator body so that they can revolve around each other, and making both of them revolve backwards as a unit. While forming a stand state (grounded state) of the resistance rod, it is also possible to form a state in which the wheels are suspended in the air and supported by the stand (non-grounded state), and conversely, by rotating forward, the resistance rod is This allows the wheels to be in contact with the ground while the rod is in a standoff state (not in contact with the ground).

According to the effect of issue 11 and issue 1!1, while equipped with wheels and resistance rods,
By rotating the two in either direction, the state where the resistance rod is grounded and the wheel is off the ground, and the state where the wheel is grounded and the resistance bar is off the ground can be selectively achieved without mutual interference. It is possible to provide a tiller that can be formed into a shape and has a tilling function using a resistance rod, and a rolling and carrying (hand-pushing) function using wheels.

Embodiments of the Invention Below, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 5.

3 shows the tiller main body, and as shown in FIG.
A drive 124 is mounted thereon, and a handle 5 is provided that extends from the machine stand 3 to the rear.

A connecting joint 8 is provided integrally with the machine base 3 at the rear of the tiller main body 1, and a lever lO is attached to the connecting joint 8 with a shaft 9 so as to be rotatable in the front-rear direction, and the free end of the rotary lever lO Axis 11
The wheel 6 is attached so as to be rotatable, and the resistance rod 7 is fixed integrally with the rotary lever lO, and the front part of the wheel is lowered along its outer periphery.

As described above, the pair of wheels 6 and resistance rods 7 are integrated and supported by a shaft 9 at the rear of the cultivator main body 1 by means of a rotary lever 10.

The wheel 6 rotates about the shaft 11 as a fulcrum, and the rotating lever 1
It is possible to revolve in the front and back direction together with the resistance rod 7 using the shaft 9 as a fulcrum through the shaft 0, and by revolutionizing backward, the resistance rod 7 is in a standing state (grounded state) and the wheel 6 supported by the resistance rod 7 is not in contact with the ground. (see Fig. 4), and by the same forward revolution, it is possible to form a standoff state (non-grounded state) of the resistance rod 7 and a grounded state of the wheels 6 (see Fig. 2). .

The embodiment illustrates means for mooring the wheels 6 and resistance rods 7 at respective positions. Regarding this, a latch 12 is provided as a means for mooring the wheels 6 and the resistance rod 7 in the state shown in FIG. 2 (a state in which the wheels 6 can be pushed by hand). The latch 12 is rotatably attached to the rear of the cultivator body 1 with a shaft 13, and when rotated in one direction, it can be locked with the rotary lever 10, and when rotated in the other direction, it can be locked. A spring 14 is provided to hold the latch in the 0-lock position where it can be released, and one end of the spring 14 is fixed to the cultivator main body 1 side, and the other end is fixed to the periphery of the shaft 13 of the latch 12 via a link 17. The tensile force applies rotational force to the latch 12. The spring 14 applies a rotation biasing force to the latch 12 in the locking direction by passing the dead point where the fulcrum (fixing point) for the latch 12 passes through the shaft 13 to one side (lower side in the figure), and also rotates the latch 12. When the fulcrum crosses the dead point to the other side (upper side in the figure), it applies a rotation biasing force in the lock release direction.

On the other hand, a locking portion 15 is provided at the opposite end of the pivot lever 10 from the wheel mounting end, and the latch 12 is rotated in the locking direction by the spring 14. It is constructed so that it engages with the stop portion 15 and maintains its engagement with a rotating force. The latch 12 has a latch piece 16 that engages with the locking portion 15.
has.

The engagement between the latch 12 and the rotation lever 10 prevents the pair of wheels 6 and resistance rods 7 from rotating rearward, mooring the wheels 6 in a grounded state and the resistance rod 7 in a non-grounded state. 6 to enable manual navigation (see Figure 2). Since the front wheel 6 tends to revolve backward due to ground resistance, it is important to lock the wheel 6 with the latch 12 to prevent the rearward rotation force.

The embodiment also has means for preventing the wheel 6 and resistance rod 7 assembly from rotating in the direction of movement (forward) of the cultivator body l; It has a stopper 18 that prevents the power cultivator from rotating forward due to the rotation biasing force of the cultivator body L, and this stopper 18 is engaged with a locking piece 19 provided at the rear end of the tiller body 1, for example, the rear end of the machine base 3. Place in engageable proximity.

In order to release the locked state, a foot part 20 is provided at the opposite end of the latch piece 16 bordering the shaft 13 of the latch 12,
By pressing the foot part 20 from the rear, the latch 1
2 is rotated in the lock release direction against the tension of the spring 14, and the fulcrum of the spring 14 accompanying this rotation is made to cross the dead point upward in the figure, and the latch 12 is rotated in the lock release direction. It is energized and held in the released state. The latch 12 can be attached to the rear part of the tiller body 1 (a part of the machine base 3), or the stopper 18 can be attached to the front edge 2 of the rotary lever 10 as shown in FIG.
3 to maintain the unlocked state (3rd
(see figure).

As long as the latch 12 is rotatable to at least the unlocked position, it can be carried out without being biased upwardly beyond the dead point in the unlocking direction.

By releasing the lock, the pair of wheels 6 and resistance rods 7 are allowed to revolve rearward with rotation of the rotary lever 10, and the resistance rods 7 form a stand state (grounded state), and the resistance The wheels 6 are supported in the air in the stand state of the rods 7 to form a non-ground state (see Fig. 4). In this state, the progress restraining force of the resistance rods 7 acts without interference from the wheels 6, and the tilling is carried out. To prevent a rotary blade 2 from advancing too far and to appropriately perform tillage.

The embodiment is a means for mooring the stand state of the resistance rod 7 and the non-ground state of the wheels 6 (means for preventing excessive backward rotation)
The rotary lever lO or a portion integrally formed therewith is configured to abut against the connecting joint 8 provided at the rear of the cultivator main body l, for example, the machine stand 3. In order to ensure this blocking, blocking pieces 21 and 22 are protrudingly provided on the connecting joint 8 side and the rotating lever 10 so as to abut each other in the backward rotation trajectory.

Since the resistance rod 7 tends to revolve backward due to the ground resistance due to the operation of the tiller, the above-mentioned blocking pieces 21 and 22
It is important to prevent excessive backward rotation from the stand state due to such factors. In addition to this backward excessive rotation prevention means, a forward rotation prevention means from the stand state may be provided.

As the resistance rod 7 and the wheel 6 revolve rearward, the latch 12 is moved so that its stopper 18 engages with the locking portion 15 of the rotating lever lO.
The fulcrum of the spring 14 crosses the dead point downward again and rotates the latch 12 in the locking direction, and the stopper 18 and the locking piece 19 engage with each other. Prevent rotation and enter standby state.

By rotating the pair of the resistance rod 7 and wheels 6 forward and backward by the rotation lever 10 from the stand state of the resistance rod 7 shown in FIG. Get grounded. In order to lead the wheel 6 to the locked state when it is in contact with the ground, a rear edge 2 is connected to the locking portion 15 of the rotary lever 10 at the end of the latch 12 on the side where the latch piece 16 is provided.
4 is provided with a sensing piece 25 that can come into contact with the latch 12, and when the rotating lever 10 is rotated forward from the stand state shown in FIG. The locking portion 15 and the latch piece 16 are engaged with each other by being rotated in a direction following the spring 14 at a predetermined rotational position while being rotated against the force.

A foothold part 26 is provided rearwardly protruding from the rotation lever lO, and the pair of wheels 6 and resistance rods 7 is moved from the tilling state shown in FIG. 4 to the third position.
It is useful for the operation to make the manual push operation possible as shown in the figure, and vice versa.

Effects of the Invention As explained above, in the present invention, a pair of wheels and a resistance rod are provided at the rear of the cultivator body so as to be rotatable.

By rotating both backwards together, the resistance rod □ stands in a stand state (grounded state), and the stand supports the wheels by floating them in the air (non-grounded state).
At the same time, by rotating the resistance rod forward, the resistance rod can be placed in a standoff state (non-grounded state 7).
? i), and at the same time, it is possible to form a ground contact state of the wheels, so 41. It is possible to provide a wheel and a resistance rod, which are contradictory to each other, and to make them both revolve in one direction or the other. With this, it is easy to obtain a state in which the resistance rod is grounded and the wheels are not grounded (a state in which tillage is possible), and a state in which the wheels are grounded and the resistance rods are not grounded (a state in which hand-push operation is possible). To provide a tiller that can selectively form each of the above states without interference between the resistance rod and the resistance rod, and that is equipped with a tilling function using the resistance rod and a turning and carrying (hand-push operation) function using wheels. did it.

In other words, in conventional manually operated tillers, resistance rods have been considered indispensable for proper tilling work, but equipping wheels with wheels is contrary to the purpose of cultivating fields, and the function of the resistance rods is However, the present invention has a configuration in which the wheels and resistance rods are paired as described above and brought to each position by rotating them. Skillfully solving contradictory technical issues,
A hand-operated tiller equipped with a hand-operated operation function other than for tilling work using wheels and when turning around the ridges, and a function of a resistance rod during tilling, and which achieves both functions properly and rationally without contradicting each other. This is what we were able to provide. In addition, if the lever supporting the wheel is set in a free state, when driving by hand when going around a undulation, etc., by lifting the handle slightly, the wheel rotates through the lever under its own weight, and it is possible to easily obtain a grounding state. The most inconvenient ridge-turning operation can be easily performed, and the tilling work can be proceeded by placing the resistance rod directly on the line of the ridge to form a grounded condition, instead of relying on the tilling spring as in the conventional method. Problems such as passing by can be resolved.

[Brief explanation of drawings]

Figures 1 to 5 show embodiments of the present invention, with Figure 1 being an overall perspective view of a manually operated cultivator, and Figures 2 to 4 showing the equipment of the tiller's wheels and resistance rods. In an enlarged perspective view,
Figure 2 shows the wheels in contact with the ground and the resistance rod not in contact with the ground, Figure 3 shows the same state with the latch released, and Figure 4 shows the wheels in contact with the ground and the resistance rod not in contact with the ground.
The resistance rod is shown in a grounded state, and FIG. 5 is a perspective view of the wheel and resistance rod assembly. l... Tiller body, 3... Machine base, 5... Handle, 6... Wheels, 7... Resistance rod, 8... Connection joint,
10... Rotating lever, 12... Latch. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] A wheel is attached to the rear of the cultivator body so that it can revolve in the front and back direction, and a resistance rod is attached in front of the wheel so that it can revolve together with the wheel, and the resistance rod and the wheel rotate together rearward to provide resistance. A manually operated tiller characterized by having a structure in which the rod is in a stand-off state and the wheels are in a non-ground state, and when the rod integrally revolves forward, the resistance bar is in a stand-off state and the wheels are in a ground-contact state. Machine.