JPS5849048Y2 - Shirokaki Kiyokinpei Souchi - Google Patents

Description

[Detailed explanation of the invention] (Target of the invention: Industrial application field) The present invention relates to a leveling device for a puddling machine, which is a type of agricultural machine for leveling the land. The present invention relates to a leveling device in which a leveling plate is suspended in an apron shape and a leveling plate is provided at the lower end of the leveling plate.

(Prior art) Conventionally, as a leveling device for a puddling machine, a leveling device in which a leveling plate is installed at the lower end of the leveling plate as described above is described in Japanese Utility Model Application Publication No. 48-50510. Are known.

The above-mentioned conventional leveling device of this form will be explained with reference to the drawings (Figs. 1 to 3). Fig. 1 is a side view of the entire puddling machine equipped with the leveling device, Fig. 2 is a plan view thereof, FIG. 3 is an enlarged view of section A in FIG. 1, and a leveling device consisting of a leveling plate 2 and a leveling plate 3 is installed behind the puddling wheel 1.

The above-mentioned ground leveling plate 2 has its upper end suspended from the rear end of the water turbine cover 5 via a horizontal shaft 4, and support rods 6 are provided on the rear surface of the ground leveling plate 2 in two places on the left and right, facing upward. The upper end of each of the support rods 6 is connected and supported via a spring 8 to the tip of a support arm 7 that projects rearward from the machine frame side, and the leveling plate 2 supports the horizontal shaft 4 at the upper end as a fulcrum. The leveling plate 3 is supported elastically and movably back and forth, and the leveling plate 3 is attached to the lower end of the leveling plate 2 suspended in this way via a horizontal shaft 9.
It is connected so that it can rotate up and down.

Depending on the work mode, this leveling board 3 may be in a vertical position in a free vertical position as shown by the imaginary line in Figure 1 during normal plowing work, or in a fixed state in a vertical position as shown in the solid line in Figure 1 during grading work. , respectively, and the leveling plate 3 is connected to a support mechanism a having a switching bundle 10 so that the connection posture can be selectively changed.

In the case of the conventional support mechanism a, the front end of a connecting rod 12 is pivotally attached to the lower rear surface of the leveling plate 3 via a shaft 11, and the rear end of the connecting rod 12 is supported diagonally upward by a shaft 13. It is connected to the lower end of the interlocking rod 14 that bends and extends forward, and the interlocking rod 1
4, the tip of the support piece 14a bent at the upper end,
The lower end of the operating rod 16 is attached to the shaft 17 so as to be connected to the upper end of the interlocking rod 14.
The upper end of the operating rod 16 is connected to the bundle 10 via a switching mechanism shown in FIG. 3.

In the switching mechanism, when the bundle 10 is rotated clockwise in FIG. 3, the engagement lock between the roller 18 and the engaging body 19 is released, and the operating rod 16 is moved as shown by the imaginary line in FIG. As a result, the leveling plate 3 becomes free to move upward and downward in the horizontal position shown in the above-mentioned imaginary line, and when the bundle 10 is rotated counterclockwise, it is brought into engagement with the roller 18. The combination 19 is in the locked state shown by the solid line, and the operating rod 16 and the continuous moving rod 14 are moved down, and the leveling plate 3 is in the fixed state in the vertical position shown in the solid line.

Thus, when the leveling plate 3 is in the vertically free state in the horizontal position shown by the imaginary line, it moves up and down following the leveling plate 2, and it moves while pressing down the soil clod plowed by the puddling water wheel 1 from above. It is possible to perform crushing and leveling of soil clods by using the leveling plate 3, and when it is fixed in a vertical position, the leveling plate 3 can be used to perform soil sloughing. A feature of this method is that even if there are large irregularities or differences in height, the field can be evenly leveled over the entire surface by damming.

(Technical problem of the present invention) By the way, in the above-mentioned leveling device, when the leveling plate 3 is fixed in a vertical position to carry out soil grading work, the leveling plate 3 is caused to move as the soil moves. Receives a big Tonosho.

In this case, in the leveling plate support mechanism a of the conventional leveling device, the interlocking rod 14 is pivoted to the machine frame with its upper part bent, and the upper bent part (the interlocking rod 14
As shown in FIG. 13.15 and the force P1. acting on this pivot point 13.15. The interlocking rod 14 is F in the middle part for the resultant force of P2.

As a result of the reaction force acting, the area near the connection point of the operating rod 16 (E
Since bending stress is generated in the E part, which can withstand large earth pressure, bending occurs in the E part.

For this reason, in the conventional type, the interlocking rod 14 must be constructed with high rigidity, and its constituent members become large and heavy, resulting in high manufacturing costs, and the interlocking rod 14 is often It had the inconvenience of being bent.

In particular, the puddling machine is a machine for leveling the land after tilling, and the required torque for tilling is small. Since the base plate 2 and the leveling plate 3 have long lateral lengths, it is inevitable that the leveling device at the rear of the aircraft body will become heavy.

If this becomes heavy, when the puddling machine is attached to the rear of the tractor, the front-to-back weight balance of the entire machine will be biased toward the rear, causing the front of the tractor to float, deteriorating work efficiency. There is a desire to reduce the weight of the leveling device installed, but in response to this demand, conventional devices have large components at the rear of the aircraft due to the reasons mentioned above, making it difficult to achieve the goal of weight reduction. First, there was a problem that deterioration in workability could not be avoided.

(Purpose of the present invention) In view of the above-mentioned problems, the present invention is designed to equip the lower part of the ground leveling plate with a leveling plate that can be moved up and down, and to adjust the horizontal posture of the leveling plate according to the work mode. In a device configured to allow the posture to be selectively changed between a flat work state and a vertical mulching work state, the support member for supporting the leveling board so that the position can be changed has the required strength. However, it was designed to be lightweight.

(Technical Means of the Present Invention...Structure) For the above-mentioned purpose, the present invention, regarding the support structure of the leveling board, includes an interlocking rod whose lower end is connected to the rear surface of the leveling board via a horizontal shaft; The interlocking rod has an operating lever connected to the upper end thereof, extending diagonally upward and forward, and the upper part of which is slidably supported on the supporting part of the puddling machine body. The leveling plate and the operating rod are connected to the truss by hinge-connecting them via a horizontal axis to the tip of a support arm that is pivotally attached to the machine frame so that it can tilt up and down. By doing so, the earth pressure acting on the leveling plate during earth-filling work acts only as a compressive force in the axial direction on the interlocking rod and the operating rod, and prevents bending stress or torsional stress from acting on it. This is a characteristic feature.

(Example) In the drawings, FIGS. 5 and 6 show a leveling device for a puddling machine to which the present invention is applied, and the same components as those of the conventional device shown in FIGS. 1 to 3 are , are given the same reference numerals.

In other words, behind the paddle water turbine 1, there are a leveling plate 2 and a leveling plate 3.
The ground leveling plate 2 has its upper end suspended from the rear end of the water turbine cover 5 via a horizontal shaft 4, and the ground leveling plate 2 is equipped with a leveling device that is supported upward on the rear surface of the ground leveling plate 2. A rod 6 is erected, and the upper end of the support rod 6 is connected and supported by the tip of a support arm 7 that protrudes rearward from the machine frame side. 4 as a fulcrum, and is elastically supported so as to be movable back and forth, and at the lower end of this leveling plate 2, a leveling plate 3 is rotatable up and down with respect to the leveling plate 2 via a horizontal shaft 9. The connected points are the same as in the conventional one.

In addition, as with conventional ones, the leveling board 3 can be placed vertically in a free state in a horizontal position as shown by the solid line C in Figure 5 during normal plowing work, or in the virtual position as shown in Figure 5 during grading work. The leveling board 3 is fixed in the vertical position shown by the line, and the connected position can be changed according to the work mode, and the leveling plate 3 has a support mechanism having a switching handle 10 so that the connected position can be selectively changed. The point connected to a is also the same as the conventional one.

This support mechanism a has an interlocking rod 14 and an upper operating rod 16, and this point is the same as the conventional one, but in the case of the present invention, these interlocking rod 14 and upper operating rod 16 (well, either Also consists of straight members.

Both the interlocking rod 14 and the upper operating rod 16 are hinged via horizontal shafts 21 and 22 to the tip of a support arm 20 which is pivotally connected to the machine frame so as to be able to tilt up and down. The operating rod 16 is configured as a truss, and the lower end of the interlocking rod 14 configured in this truss is connected to the horizontal axis 2.
3 to a mounting piece 24 projecting from the rear surface of the leveling plate 3.

(Note: The term truss here refers to a frame structure in which two or more straight members are joined together using frictionless pins.

) In FIG. 5, reference numeral 25 is a compression spring, and this compression spring 25 is interposed between a flange 26 provided at an intermediate position of the upper operating rod 16 and a support member 27 on the side of the puddling machine main body. When the leveling plate 3 is placed in a vertically free state in a horizontal position, a required pressing force is applied to the leveling plate 3 so that the leveling action can be performed accurately.

(Effects of the present invention) According to the leveling device of the present invention configured as described above, when carrying out soil levying work with the leveling plate 3 in a fixed state in the vertical position shown by the imaginary line in FIG. Even if a large earth pressure acts on the leveling plate 3 due to the movement of the leveling plate 3, the earth pressure acting on the leveling plate 3 will be affected by the arrows in relation to the interlocking rod 14 and the upper operating rod 16 as shown in FIG. The support member of the leveling plate 3 acts only as a compressive force in the axial direction, and no bending stress or torsional stress is generated on the interlocking rod 14 and the upper operating rod 16. It is sufficient to construct the supporting members to have the required strength; in other words, there is no need to consider rigidity against bending stress or torsional stress, so these supporting members can be made of relatively thin rods.

As a result, the weight of the leveling device installed at the rear of the plowing machine is reduced, so when the plowing machine is attached to a tractor and is used for plowing work or earth mulching work, compared to the conventional one, the weight of the leveling device installed at the rear of the plowing machine is reduced. Since the weight is reduced and the front and rear weight balance is stabilized, work efficiency can be improved, and
Excellent effects such as lowering production costs can be obtained.

[Brief explanation of the drawing]

Figures 1 to 4 show the prior art of the leveling device for a puddling machine, which is the subject of the present invention, and Figure 1 is a side view;
Figure 2 is the same plan view, Figure 3 is an enlarged view of the first part A, and Figure 4 is an enlarged view of the first part A.
The figure is an explanatory view of the operation, and FIGS. 5 and 6 show the leveling device for a puddling machine according to the present invention, with FIG. 5 being a side view and FIG. 6 being an explanatory view of the operation. 1... Substitute water wheel, 2... Leveling board, 3
... Leveling board, 5 ... Water wheel cover, 4,
9...Horizontal axis, 14...Interlocking rod, 16.
... Upper operating rod, 20 ... Support arm,
21, 22, 23... horizontal axis, 24...
mounting piece.

Claims (1)

[Scope of utility model registration request] A leveling plate is suspended from the rear of the water wheel cover of the plowing machine.
A leveling plate is pivotally attached to the lower end of the ground leveling plate so as to be able to rotate up and down, and can be selectively placed into a leveling work state in a horizontal position or a grading work state in a vertical position, depending on the work mode. In a leveling device that supports the leveling plate so that its posture can be changed, in order to support the leveling plate so that its posture can be changed, an interlocking rod whose lower end is connected to the rear surface of the leveling plate via a horizontal shaft, and an interlocking rod that It has an operating lever that is connected to the upper end of the lever and extends diagonally upward and forward, and whose upper part is slidably supported by the support part of the puddling machine body, and both the interlocking lever and the operating lever are used as straight members. both,
It is characterized by a structure in which a leveling plate, a series of movable rods and an operating rod are connected to a truss by hinge-connecting via a horizontal shaft to the tip of a support arm which is pivotally attached to the main body of the pudding machine so as to be tiltable up and down. A leveling device on the side of the plowing machine.