JP3124175B2 - Tiller with work handle folding mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a cultivator, and more particularly to a bending mechanism of a working handle.

[0002]

2. Description of the Related Art FIG. 6 shows an overall side view of a conventional cultivator. The drive unit 6 is provided with a gear case 8 and a support arm 7, and a rotor shaft 10 </ b> J is supported at the tip of the support arm 7. The power of the driving unit 6 is transmitted to the rotor shaft 10J via the gear case 8 and the support arm 7, and
The plurality of rotors 10 fixed to 0J are driven to rotate, and the soil is swept up. The guard 9 attached to the gear case 8 is a mudguard.

An operator grasps a grip 14 of a working handle 14.
By operating the tiller with T, the gripper 14T is pressed in the direction of arrow 93, and the rotor 10 is pressed against the soil to perform the tillage operation. The work handle 14 is connected to the connection bar 11 by a connection bolt 72. At the time of tilling work, the working handle 14 and the connection bar 11 are located on a straight line as shown in FIG. The connection bar 11 is further connected to a connecting portion 13, which is fixed to the gear case 8.

[0004] A resistance rod 16 and a moving wheel 18 are fixed to the gear case 8, and during tilling work, the resistance rod 16 is brought into contact with the ground to press the rotor 10 as shown in FIG. When the cultivator is moved, the resistance bar 16 and the moving wheel 18 are rotated by 180 degrees about the rotating shaft 17 to bring the moving wheel 18 into contact with the ground. The lever 17a is a fixed lever for fixing the rotation of the resistance bar 16 and the moving wheel 18.

By the way, when the cultivator is to be stored or stored, as shown in FIG. 6, if the working handle 14 and the connecting bar 11 are positioned in a straight line, the working handle protrudes and extends. 14, a large storage space is required. For this reason, the work handle 14 is turned around the connection bolt 72 in the direction of arrow 91 and bent.

A conventional connection structure between the working handle 14 and the connection bar 11 will be described in detail with reference to FIGS. First,
In FIG. 7, A is a plan view and B is a side view. A bracket 71 is welded to the tip of the connection bar 11, and two plate portions of the bracket 71 have grip portions 71.
W is formed (see FIG. 7B). This grip part 71W
Is cut out in a semicircular shape to a size enough to fit the working handle 14 formed by a cylindrical pipe.

On the other hand, two pressing portions 70 are welded to the working handle 14. This work handle 14-2
The bracket 71 of the connection bar 11 is inserted into the space 70S between the pressing portions 70. That is, the two holding parts 7
At 0, the bracket 71 is sandwiched and positioned. FIG. 8A shows this state. 8A and 8B are cross-sectional views from the direction of arrows VIII-VIII in FIG. 7A. As shown in FIG. 8A, the work handle 14 is positioned so as to fit into the grip portion 71 </ b> W of the bracket 71.

Here, the two holding portions 70 of the working handle 14 are formed with long holes 70a as shown in FIG. 7B. On the other hand, a bolt hole 11 a is formed near the bracket 71 of the connection bar 11. As shown in FIG. 8A, in a state where the work handle 14 and the connection bar 11 are connected, an elongated hole 70a formed in the holding portion 70 of the work handle 14 and a bolt hole 11 formed in the connection bar 11 are formed.
The knob bolt 72 is made to penetrate through a.

When the work handle 14 is inserted into the grip portion 71W, as shown in FIG. 8A, the bolt hole 11a of the connection bar 11 is located at the end on the distal end side of the elongated hole 70a, and the knob bolt 72 Also penetrates this end of the elongated hole 70a. The penetrated knob bolt 72 is
N, and the connection between the connection bar 11 and the working handle 14 is fixed. The holding plate 73 is attached to the nut 73N.
Are welded to sufficiently fix the connection bar 11 and the working handle 14 in the state of FIG. 8A.

As described above, by tightening the knob bolt 72, the connection bar 11 and the working handle 14 are positioned and fixed in a straight line, and the tilling operation is performed (see FIG. 6).
As shown in FIG. 8A, tightening of the knob bolt 72,
The connection bar 11 and the work handle 14 are fixed on a straight line by being held at two positions, that is, the grip portion 71W and the work handle 14 being inserted.

When bending the working handle 14 in the direction of arrow 91, the knob bolt 72 is loosened. As a result, the connection between the connection bar 11 and the work handle 14 is released, and the work handle 14 can slide in the direction of the arrow 92 (FIG. 8A). In other words, the working handle 14 can be moved with respect to the knob bolt 72 by the length of the elongated hole 70a of the holding portion 70.

FIG. 8B shows a state in which the work handle 14 has been moved. By the movement of the working handle 14,
Work handle 14 from grip 71W of bracket 71
, The work handle 14 can be turned around the knob bolt 72. In this state, the working handle 14
Is bent in the direction of arrow 91 to store and store the cultivator.

[0013]

The conventional cultivator has the following problems. First, as described above, the connection bar 11
The work handle 14 is fixed by tightening a knob bolt 72. Here, vibration is transmitted to the connection bar 11 and the working handle 14 by the tillage work,
The vibration may cause the knob bolt 72 to be loosened. When the knob bolt 72 is loosened, the work handle 14 comes off from the grip portion 71W of the bracket 71 as shown in FIG. 8B, and the fixing between the connection bar 11 and the work handle 14 is released.

When the fixing is released, the working handle 14
Becomes rotatable not only in the direction of arrow 91 but also in the direction of arrow 93. At the time of the tilling work, the worker presses the work handle 14 in the direction of the arrow 93 to perform the work, and if the fixing of the work handle 14 is released carelessly, there is a problem that the safety is lacking. .

When the working handle 14 is bent in storing and storing the cultivator, first, the knob bolt 72 is loosened, and the working handle 14 is once pulled up in the direction of arrow 92 (FIG. 8A). Handle 1
4 needs to be rotated in the direction of arrow 91.

Further, when performing the tilling work, if the work handle 14 in a bent state is extended and fixed,
Conversely, once the work handle 14 is moved in the direction of arrow 94 (FIG. 8A).
8B while holding it in the state shown in FIG. 8B.
It is necessary to tighten 2. As described above, there is also a problem that the work of bending the working handle 14 during storage and storage and the work of fixing the tilling work are troublesome.

Further, at the time of storage and storage, the working handle 14 is unstable when the working handle 14 is bent, and when the shock or the like is applied, the working handle 14
The connection bar 11 and the like may be damaged by the collision. Further, the wobble of the working handle 14 also lacks safety.

Therefore, the present invention can ensure the safety during the tilling work, and can easily perform the fixing work and the bending work of the work handle, and further prevent the work handle from wobbling in the bent state. It is an object of the present invention to provide a cultivator having a working handle bending mechanism capable of performing a work.

[0019]

According to a first aspect of the present invention, there is provided a cultivator having a working handle bending mechanism according to the first aspect, comprising a driving unit, a rotor unit driven to rotate by receiving the power of the driving unit, and plowing soil.
A connection bar provided in the drive unit, a work handle connected to the connection bar by a connection shaft and rotatably attached to the connection bar, and a work handle for operating the operation of the rotor unit; In the cultivator equipped with a, the working handle is formed with a blocking surface that contacts the connection bar and prevents rotation in the handle pressing direction during the tilling operation, and the working handle is in a direction opposite to the handle pressing direction. handle bent only in a direction is pivotable, in a state where the connection with the blocking surface which is formed in the working handlebars are in contact, and a fixture is provided for fixing the connecting bar and the working wheel, the The fixing device is provided at a location different from the connection shaft.
And the blocking surface is in contact with the connection bar.
Is fixed .

A cultivator having a working handle bending mechanism according to a second aspect of the present invention is the cultivator having the working handle bending mechanism according to the first aspect, wherein the cultivator is fitted with the working handle bent in the bending direction. A holding piece for holding a bent state of the handle is provided.

[0021]

In the tilling machine having the working handle bending mechanism according to the first aspect, the working handle is provided with a blocking surface which is in contact with the connection bar and prevents rotation in the handle pressing direction during the tilling work. Have been. The working handle is rotatable only in the handle bending direction opposite to the handle pressing direction.

Therefore, even if the fixing bolts and the like are loosened due to the influence of vibration during the tillage work,
The working handle does not rotate in the handle pressing direction.

Further, there is provided a fixture for fixing the connection bar and the work handle in a state where the blocking surface formed on the work handle is in contact with the connection bar.

Therefore, the connection bar and the work handle are fixed by the fixing tool, or by releasing the fixation, the work handle can be rotatable in the handle bending direction with respect to the connection bar.

According to a second aspect of the present invention, there is provided a cultivator having a working handle bending mechanism, wherein a holding piece is provided which is fitted to the working handle bent in the bending direction and holds the bent state of the working handle. .

Therefore, the bent state of the working handle can be reliably held by the holding piece.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a cultivator having a working handle bending mechanism according to the present invention will be described with reference to the drawings. FIG. 1 is a side view showing the entire configuration of the cultivator of the present embodiment.
The drive unit 6 is provided with a gear case 8 and a support arm 7, and a rotor shaft 10 </ b> J is supported at the tip of the support arm 7. The gear case 8 has a built-in reduction gear, and the power of the drive unit 6 is reduced by the reduction gear and further transmitted to the rotor shaft 10J via the support arm 7.

A plurality of rotors 10 are fixed to the rotor shaft 10J. Then, the plurality of rotors 10 are also rotationally driven by the rotation of the rotor shaft 10J by receiving the power of the driving unit, and the rotating rotor 10 causes soil to be generated. Note that a guard 9 for preventing mud is attached to the gear case 8.

A connection bar 11 is fixed to the gear case 8 via a connecting portion 13, and a work handle 14 is further connected to the connection bar 11. Connection bar 1
A cover 12 is attached to 1 to cover a connection portion with the working handle 14. The operator operates the cultivator by holding the grip portion 14T of the working handle 14, presses the grip portion 14T in the direction of the arrow 93 that is the handle pressing direction, and presses the rotor 10 against the soil to perform the tilling operation. In addition,
FIG. 2 shows a connection bar 11, a working handle 14, and a cover 12.
FIG.

As shown in FIG. 1, a resistance bar 16 is attached to the connecting portion 13. The operator presses the resistance bar 16 against the ground during the tilling operation, and performs the operation while controlling the progress of the tilling machine. The angle of the resistance bar 16 can be switched around the resistance rod center axis 16J according to the height of the worker.

A moving wheel 18 is fixed to the resistance bar 16. Two moving wheels 18 are provided side by side in the direction of the rotor shaft 10J. At the time of the tilling work, the work is performed with the resistance bar 16 in contact with the ground as shown in FIG. On the other hand, when moving the cultivator, the resistance bar 16 and the moving wheel 18 are rotated 180 degrees around the rotation shaft 17 so that the moving wheel 18 is positioned so as to be in contact with the ground (not shown). Then, the tiller is moved in this state. In addition,
By operating the lever 17a, the resistance bar 16, the moving wheel 18
Rotate and fix.

When the cultivator is to be stored, stored, or the like, as shown in FIG. 1, if the working handle 14 and the connecting bar 11 are positioned on a straight line, the working handle protrudes and extends. 14, a large storage space is required. For this reason, the working handle 14 is rotated and bent about the pin 41 in the direction of the arrow 91 which is the handle bending direction.

The connection structure between the work handle 14 and the connection bar 11 will be described in detail with reference to FIGS. The work handle 14 has a handle bracket 40 at the center. The handle bracket 40 is formed in a U-shape as shown in FIG. 3, and the working handle 14 is welded to both side surfaces. A blanket shaft hole 40 a is formed at an end of the handle bracket 40. In addition,
The bottom surface 40M of the handle bracket 40 is a blocking surface in the present invention, and the working handle 14 is formed with such a blocking surface.

On the other hand, the connection bar 11 is formed of a hollow prism, and has a connection bar shaft hole 11a formed at the tip. Handle bracket 4 near the tip of connection bar 11
It is inserted so as to be wrapped in 0. Then, a pin 41 as a connection shaft passes through a connection bar shaft hole 11 a formed in the connection bar 11 and a blanket shaft hole 40 a formed in the handle bracket 40.

A locking groove 41G is formed at the tip of the pin 41. After a washer 46 is attached to the penetrating pin 41, a retaining ring 45 is fitted into the locking groove 41G. In this manner, the pin 41 is prevented from coming off while penetrating the connection bar shaft hole 11a and the blanket shaft hole 40a.
The connection bar 11 and the working handle 14 are connected. FIG. 4A shows this connection state. In FIG. 4A, the working handle 14 located on one side is shown as a cross section.

The connected connection bar 11 and the working handle 14 are fixed by a knob bolt 50 as a fixing tool. As shown in FIG. 3, connection bar fixing holes 11 b are formed in the flat portion and the bottom portion of the connection bar 11. A blanket fixing hole 40b is formed in the bottom surface 40M of the handle bracket 40 at a position corresponding to the connection bar fixing hole 11b of the connection bar 11.

The knob bolt 50 passes through a connection bar fixing hole 11b formed in the connection bar 11 and a blanket fixing hole 40b formed in the handle bracket 40. As shown in FIG. 4A, a washer 51, a spacer 52, a spring 53, and a washer 54 are attached to the knob bolt 50.

Then, the connection bar 1 is inserted through the connection bar fixing hole 11b formed in the plane portion of the connection bar 11,
A retaining ring 55 is fitted into the knob bolt 50 from the inside of 1. The retaining ring 55 can prevent the knob bolt 50 from falling off from the connection bar 11 even when the knob bolt 50 is loosened.

A blanket fixing nut 40N is welded to the back of the blanket fixing hole 40b formed in the bottom surface 40M of the handle bracket 40 (see FIG. 4A). Connection bar fixing hole 11b formed on the bottom surface of connection bar 11, and bottom surface 40 of handle bracket 40
The knob bolt 50 penetrating through the blanket fixing hole 40b formed in the M is screwed into the blanket fixing nut 40N.

The connection between the connection bar 11 and the working handle 14 is fixed by tightening the knob bolt 50. When the knob bolt 50 is tightened, a tightening force is applied on average by the spring 53.

As described above, by tightening the knob bolt 50, the connection bar 11 and the work handle 14 are positioned and fixed in a straight line, and the tilling work is performed (see FIG. 1).
When storing and storing the cultivator, the knob bolt 50 is loosened and the working handle 14 is bent in the direction of arrow 91.
Loosen the knob bolt 50 and fix the blanket fixing nut 40
FIG. 4B shows a state where it is removed from N.

As shown in FIG. 4B, the handle bracket 40 and the working handle 14 are rotatable in the direction of arrow 91 about the pin 41. Here, the knob bolt 50
Even if the angle is loosened, since the bottom surface portion 40M of the handle bracket 40 is in contact with the bottom surface of the connection bar 11,
The rotation of the work handle 14 in the direction of the arrow 93 is prevented, and the work handle 14 turns only in the direction of the arrow 91.

Therefore, the working handle 14 is moved to the arrow 93
When the tilling work is performed while pressing in the direction, even if the knob bolt 50 is loosened, the working handle 14 does not inadvertently rotate in the arrow 93 direction,
Safety can be ensured. In addition, knob bolt 50
Connection bar 11 by tightening or loosening
Can be fixed to the work handle 14 or the work handle 14 can be bent. Therefore, the fixing work and the bending work of the working handle 14 can be easily performed.

The bottom portion 4 of the handle bracket 40
0M constitutes the blocking surface in the present invention. But,
The blocking surface is not limited to this, and any other blocking surface that prevents rotation of the working handle 14 in the handle pressing direction (the direction of the arrow 93) during the tilling work by contacting the connection bar 11 can be used. A structure may be used.

The fixing tool is not limited to the knob bolt 50, and any other structure may be used as long as the connection bar 11 and the working handle 14 can be fixed. In the above embodiment, the knob bolt 50 penetrates the flat portion, the bottom portion of the connection bar 11, and the bottom portion 40M of the handle bracket 40 to fix the work handle 14, but may also penetrate from the side direction and fix it. it can.

As described above, the cover 12 is attached to the connection bar 11 so as to cover the connection with the work handle 14. In FIG. 4, for convenience of explanation,
Although the cover 12 is omitted, the knob bolt 50 is attached from above the cover 12 as shown in FIGS.

A stopper 19 as a holding piece is fixed to the cover 12. Arrow 91 for work handle
When bent in the direction, the reinforcing bar 15 (FIG. 2) of the working handle 14 is fitted. Reinforcing bar 1
A bar 5 is welded and fixed between the two working handles 14 and reinforces the working handles 14.

FIG. 5 shows details of the stopper 19. FIG.
A is a side view, and FIG. 5B is a plan view. The stopper 19 is formed by bending a metal plate, and has elasticity. The stopper 19 is provided on the stopper base 1.
It is fixed to the cover 12 by 9D. As shown in FIG. 5B, the stopper base 19D is attached to the cover 12 by screws 19H.

When the work handle 14 is bent about the pin 41 in the direction of the arrow 91, the reinforcing bar 15 comes into contact with the bent projection 19T of the stopper 19. When the work handle 14 is further pressed from this state, the stopper 19 bends due to this force, and the reinforcing bar 15 fits into the curved portion of the stopper 19.

As described above, since the reinforcing bar 15 of the working handle 14 is fitted to the stopper 19, the bent state of the working handle 14 can be reliably held.
This makes it possible to prevent wobble of the work handle 14 when the work handle 14 is bent, and to stabilize the bent state.

Note that the holding piece in the present invention is not limited to the above-described stopper 19, and any other structure may be employed as long as it can hold the bent state of the working handle 14 reliably. Further, in the present embodiment, it is fitted to the reinforcing bar 15, but it may be fitted directly to the working handle 14.

[0052]

According to the cultivator having the working handle bending mechanism according to the first aspect, the working handle includes:
A blocking surface is formed in contact with the connection bar and for blocking rotation in the handle pressing direction during the tilling operation. And
The work handle is rotatable only in the handle bending direction opposite to the handle pressing direction.

That is, even if the fixing bolt or the like is loosened due to the influence of vibration during the tillage work, the work handle does not rotate in the handle pressing direction. For this reason, safety during tilling work can be ensured.

Further, there is provided a fixture for fixing the connection bar and the work handle in a state where the blocking surface formed on the work handle is in contact with the connection bar.

That is, the connection bar and the work handle are fixed by the fixture, or by releasing the fixation, the work handle can be turned with respect to the connection bar in the handle bending direction. Therefore, the work for fixing and bending the work handle can be easily performed.

The cultivator having the working handle bending mechanism according to the second aspect is provided with a holding piece that is fitted to the working handle bent in the bending direction and holds the bent state of the working handle. .

That is, the bent state of the working handle can be reliably held by the holding pieces. Therefore, when the work handle is bent, the work handle can be prevented from wobbling, and the bent state can be stabilized. Therefore, there is no danger that the working handle will move unexpectedly when the cultivator is transported or stored, and a hand or the like will be pinched.

[Brief description of the drawings]

FIG. 1 is an overall side view showing an embodiment of a cultivator having a working handle bending mechanism according to the present invention.

FIG. 2 is a plan view of a working handle and a cover in the cultivator shown in FIG.

FIG. 3 is a perspective view showing details of a connection between a working handle, a connection bar, and a connection in the tiller shown in FIG. 1;

FIG. 4 is a side view showing details of a connection between a working handle, a connection bar, and the like in the cultivator shown in FIG. 1;

5 is a view showing details of a stopper portion in the cultivator shown in FIG. 1, wherein A is a side view and B is a plan view thereof.

FIG. 6 is an overall side view showing a conventional tiller.

FIG. 7 is a view showing details of the connection between the handle for tiller work and the connection bar shown in FIG. 5, wherein A is a plan view and B is a side view.

FIG. 8 is a side view showing details of the connection of the tiller working handle, the connection bar and the connection shown in FIG. 5;

[Explanation of symbols]

 6 ... Drive section 10 ... Rotor 11 ... Connection bar 14 ... Work handle 19 ... Stopper 40 ... Handle blanket 40M ... ... Bottom part 41 ... Pin 50 ... Knob bolt

Claims (2)

(57) [Claims] 1. A driving section, a rotor section that receives the power of the driving section and is driven to rotate to produce soil, a connection bar provided on the driving section, and a connection bar connected to the connection bar by a connection shaft. A cultivator having a work handle movably attached and a work handle for operating the operation of the rotor section, wherein the work handle is in contact with the connection bar, and The work handle is rotatable only in a direction in which the handle is bent in a direction opposite to the direction in which the handle is pressed, and a blocking surface formed in the work handle and a connection bar. in a state in which bets are in contact, the connection bar with and fixture is provided for fixing the working wheel, the fixture contact provided at a location different from the connection shaft
Where the blocking surface is in contact with the connection bar
Cultivator having a working handle bending mechanism, characterized in that the cultivator is fixed . 2. A cultivator having a working handle bending mechanism according to claim 1, further comprising a holding piece that is fitted to the working handle bent in the bending direction and holds a bent state of the working handle. A tiller having a working handle bending mechanism, characterized in that: