JPH0528961Y2 - - Google Patents

Description

[Detailed description of the invention] A. Purpose of the invention A. Industrial application field This invention relates to a land leveling device for agricultural machinery.

B. Conventional technology Conventionally, a leveling plate for leveling the field is attached to the rear of an agricultural machine for plowing, crushing soil, or puddling, and auxiliary leveling plates are attached to both ends of the leveling plate.
It clears the ground wider than the working width and eliminates the remaining grooves formed on the field at both ends of the work equipment.
The above-mentioned auxiliary leveling plate becomes an obstacle during shoreside work and transportation, so it is rotated and stored inside the leveling plate, and its operation can be done remotely from the tractor seat. There is something like No. 60-18001.

C. Problems with the conventional technology In the conventional technology disclosed in Utility Model Publication No. 60-18001, the extension leveling plate is folded and rotated back via a rope from above the tractor seat.
At the time of return rotation, the rope is pulled up and pulled to the limit point, and the rope is suddenly supplied and pulled, giving an amplitude to the extension leveling plate. The coil spring crosses the reversal point due to the reaction of this amplitude, and the restoring force of the coil spring urges the coil spring to rotate outward and return to the rotation, but the rope is suddenly supplied and pulled, and the extension is balanced. In order to return the flat plate to its rotational direction, it is necessary to supply the rope and maintain the appropriate amount of time to pull it, and the amount and force of the rope to be pulled must be adjusted using the senses of a human operator in order to return to its rotational position. is skilled.

B. Structure of the invention A. Means for solving the problem The present invention is such that the auxiliary ground leveling plate 10 is rotatably attached to both sides of the ground leveling plate 9 by a second pivot shaft 9B, and the auxiliary leveling plate 9 and the auxiliary leveling plate The second pivot shaft 9B between the base plate 10
A first tension spring 12 is stretched over the fulcrum, and a rod 11 whose rotation range is restricted is pivotally attached to the auxiliary leveling plate 10, and a rope 14 is attached to the long side end of the rod 11. At the same time as locking one end of the rope 1
A second tension spring 12 having a tension larger than that of the first tension spring 12 is fixed at the other end of the spring 4 to the upper part of the support plates 2C and 2D, and urges the rod 11 in the direction of collapse between the rod 11 and the auxiliary ground leveling plate 10. This is a ground leveling device for an agricultural machine in which a tension spring 13 is tensioned.

B. Example 1 of the invention is an earth leveling work machine. 2 is a 3 point frame,
2A is a top link engagement plate, and 2B is a lower link pin.

2C and 2D are support plates. 3 is a transmission, 3A is an input shaft, and a bevel gear is installed inside the transmission 3. 4, 4A is a cylindrical machine frame.

5 is fixed to the machine frame 4 by a chain case.

6 and 6A are side plates, and 7 is a cover.

Reference numeral 8 denotes a flat plate, which is pivotally supported by the side plates 6, 6A with a first pivot shaft 8A.

9 is a leveling plate, and 10 is an auxiliary leveling plate. The ground leveling plate 9 is pivotally supported by a leveling plate with a shaft (not shown).

9A is a board installed near both ends of the leveling plate 9,
The second pivot shaft 9B is inserted and locked.

Reference numeral 9C designates first spring locking plates protruding from both ends of the ground leveling plate 9.

A second spring locking plate 10A and a plate body 10B are fixed to the auxiliary ground leveling plate 10, and the end extending in the direction of the leveling plate 9 is pivotally supported by a second pivot shaft 9B.

A support plate 10D protrudes outward from the auxiliary ground leveling plate 10, into which a third pivot shaft 10E is inserted.

Reference numeral 11 denotes a rod whose rotation range is restricted, and is formed into a substantially L-shape, and is pivoted to the third pivot shaft 10E through a hole formed approximately in the middle of the short side of the L-shape. There is.

The rotation range of the rod 11 is restricted by the end corner of the short side of the L-shape and the bent corner of the L-shape coming into contact with the auxiliary leveling plate 10 .

12 is a first tension spring stretched between the first spring locking plate 9C and the second spring locking plate 10A.

Reference numeral 13 denotes a second spring locking plate 10A, which is stretched between a hole formed approximately in the middle of the long side of the rod 11 and the second spring locking plate 10A.
It is a tension spring.

Reference numeral 14 denotes a rope, one end of which is locked in a hole formed near the end of the long side of the rod 11, and the other end is connected to the support plate 2.
It is locked to the top of C and 2D.

The second tension spring 13 is the first tension spring 12
is formed to have a tension greater than the tension of the

The rotational power transmitted to the input shaft 3A is transmitted to the sprocket in the chain case 5 via a bevel gear installed in the transmission 3, a shaft installed in the cylinder 4, and a sprocket in the chain case 5. The effecting body 15 is rotated through the chain and sprocket.

C. Function During normal ground leveling work, the auxiliary ground leveling plate 10 extends outward from the side edge of the leveling plate 9.

When the auxiliary ground leveling plate 10 is extended, the first tension spring 12 acts to move the auxiliary ground leveling plate 10 downward, thereby leveling the ground.

For example, when working near the shore of the chain case or when there is an obstacle on the chain case side, grasp the vicinity of the locking part of the support plate 2C of the rope 14 and move the rope 14 to the support plate against the tension of the first tension spring 12. 2
When gently pulled toward the rope locking portion C, the auxiliary ground leveling plate 10 rotates upward.

At this time, the second tension spring 1 that urges the rod 11
In addition to the fact that the tension of the first tension spring 3 is greater than the tension of the first tension spring 12, the rope 14 is gently
Since the rod 11 is pulled toward the locking portion of the rope 14 at the upper part of C, the corner of the bent portion of the rod 11 does not rotate toward the upright side against the biasing force of the second tension spring 13. The auxiliary ground leveling plate 10 stands up and rotates clockwise in FIG. 2 while in contact with the auxiliary ground leveling plate 10.

Eventually, when the rope 14 is located approximately on the line connecting the second pivot shaft 9B and the vicinity of the rope 14 locking portion on the upper part of the support plate 2C, that is, the state shown by the two-dot chain line in FIG. 2, the first The line of action of the tension spring 12 extends beyond the second pivot shaft 9B and lies inside the line connecting the locking portion of the first tension spring 12 of the first spring locking plate 9C and the second pivot shaft 9B. , is located on the side of the leveling plate 9, and urges the auxiliary leveling plate 10 clockwise in FIG.

At the above position, when the pulling of the rope 14 is stopped and the rope 14 is loosened in the opposite direction to the pulling direction, the auxiliary ground leveling plate 10 is moved by the biasing force of the first tension spring 12 to the ground leveling plate 9.
The corner of the long side of the rod 11 is rotated in the direction of the ground leveling plate 9.
It comes into contact with the top surface of and stops.

The auxiliary ground leveling plate 10 is urged in the direction of contacting the ground leveling plate 9 by the action of the first tension spring 12 .

To return and rotate the auxiliary ground leveling plate 10, use the rope 1
4 is gently pulled against the biasing force of the first tension spring 12, the auxiliary leveling plate 10 rotates upward with the bent corner of the rod 11 in contact with the auxiliary leveling plate 10, Eventually, the second pivot shaft 9B and the support plate 2
The state in which the rope 14 is located approximately on the line connecting the locking portions of the rope 14 at the upper part of C, that is, the state shown by the two-dot chain line in FIG. 2 is reached.

From this state, the rope 14 is further extended to the support plate 2C.
When the upper rope 14 is pulled toward the locking part, the rod 11 rotates counterclockwise in FIG. 2 against the urging force of the second tension spring 13, and the short side corner of the rod 11 assists. It comes into contact with the ground leveling plate 10.

At this time, the rope 14 remains located approximately on the line connecting the second pivot shaft 9B and the rope locking portion on the upper part of the support plate 2C, so the auxiliary ground leveling plate 1
0 rotates counterclockwise in FIG. 2 about the second pivot shaft 9B.

The state in which the rope traction has reached its limit, that is, the third
When the state shown by the two-dot chain line in the figure is reached, the line of action of the first tension spring 12 crosses the second pivot shaft 9B and connects with the locking portion of the first tension spring 12 of the first spring locking plate 9C. It is located outside the line connecting the second pivot shaft 9B, that is, on the chain case 5 side, and biases the auxiliary ground plate 10 counterclockwise in FIG. 3.

At this time, when the rope 14 is loosened in the opposite direction to the traction direction, the auxiliary ground plate 10 is moved by the first tension spring 12.
Due to the biasing force of the second tension spring 13, the rod 11 rotates counterclockwise in FIG.
Rotate clockwise in Fig. 3 centering on the rod 1.
The bent corner of the L-shape No. 1 comes into contact with the auxiliary leveling plate 10 and stops rotating.

C. Effect of the invention In the present invention, the auxiliary ground leveling plate 10 is rotatably attached to both sides of the leveling plate 9 by the second pivot shaft 9B, and the second pivot plate 10 is attached between the leveling plate 9 and the auxiliary ground leveling plate 10. Support shaft 9B
A first tension spring 12 is stretched over the fulcrum, and a rod 11 whose rotation range is restricted is pivotally attached to the auxiliary leveling plate 10, and a rope 14 is attached to the long side end of the rod 11. At the same time as locking one end of the rope 1
A second tension spring 12 having a higher tension than the first tension spring 12 is fixed at the other end of the spring 4 to the upper part of the support plates 2C and 2D, and urges the rod 11 in the direction of collapse between the rod 11 and the auxiliary ground leveling plate 10. Since the structure is such that the tension spring 13 is tensioned, the following effects are achieved.

(a) When rotating the auxiliary ground leveling plate from the working position to the storage position, use a force that resists the biasing force of the first tension spring until just before the rod begins to rotate against the biasing force of the second tension spring. When the rope is pulled gently, the line of action of the first tension spring reliably crosses the second pivot axis toward the ground leveling plate, and in this state, when the rope is loosened in the opposite direction to the pulling direction, the auxiliary ground leveling plate can be rotated and stored inside the leveling plate by the biasing force of the first tension spring.

(b) When rotating the auxiliary ground leveling plate from the storage position to the working position, when the rope is pulled to the traction limit against the biasing forces of the first tension spring and the second tension spring, the line of action of the first tension spring is Make sure to cross the second pivot shaft towards the case side, and in this state loosen the rope in the opposite direction to the traction direction, the auxiliary ground plate will rotate towards the chain case side.
Return to working position.

C. In order to rotate the auxiliary ground leveling plate, there is no need for sudden rope supply or towing operations, which reduces labor.

(d) There is no need to adjust the rope supply or traction interval, and there is no need to adjust the traction amount and traction force with human feeling, and no skill is required for operation.

E. The storage and return rotation of the auxiliary ground leveling plate does not require sudden rope supply or towing operations, so it can be operated more quickly.

[Brief explanation of the drawing]

Figure 1 is a perspective view of the whole from the rear direction, Figure 2 is an enlarged rear view of the main part when the auxiliary leveling plate is rotated to the outside of the leveling plate, and Figure 3 is the auxiliary leveling plate inside the leveling plate. FIG. 6 is an enlarged rear view of the main part when the main part is rotated. 1... Earth leveling work machine, 8... Leveling plate, 9... Leveling plate, 10... Auxiliary leveling plate, 11... Rod body, 12...
...First tension spring, 13...Second tension spring, 1
4...rope.

Claims (1)

[Scope of utility model registration request] An auxiliary ground leveling plate 10 is rotatably attached to both sides of the leveling plate 9 by a second pivot shaft 9B, and a fulcrum is provided between the leveling plate 9 and the auxiliary ground plate 10 with respect to the second pivot shaft 9B. At the same time, a rod 11 whose rotation range is restricted is pivotally attached to the auxiliary leveling plate 10, and a rope 1 is attached to the long side end of the rod 11.
4, the other end of the rope 14 is locked to the upper part of the support plates 2C, 2D, and the rod 11 is urged in the direction of collapse between the rod 11 and the auxiliary ground leveling plate 10. A ground leveling device for an agricultural machine, characterized in that a second tension spring 13 having a higher tension than the first tension spring 12 is provided.