JPS591456Y2 - Wheel lifting device in rice transplanter - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a wheel lifting device for a rice transplanter.

Conventionally, in the wheel up and down device of this type of rice transplanter,
The left and right swinging rods, one end of which is pivotally supported on the left and right swing cases, and the other end of which is pivotally supported on both sides, are swung around a fulcrum shaft attached to a telescoping shaft extending in the front and back direction of the wheel lifting device. The left and right sides of the swing wheel are switched between a state of the same height and a state of difference through a locking pin that is movably provided and selectively inserted into a plurality of retaining holes provided on one side of the swinging rod. A system with a suitable structure has been proposed.

However, in general, in rice transplanters, it is preferable to align the center of gravity of the machine to the center of the machine as much as possible, but if all of the numerous parts included in the machine were arranged on the center line of the machine, the overall length of the machine would become long. Since some parts inevitably have fixed positions, it is extremely difficult to arrange the related mechanisms in a well-balanced manner to make the aircraft compact, and the center of gravity is often unevenly located on either the left or right side of the aircraft. I had no choice but to let it go.

In this way, in a rice transplanter where the center of gravity of the machine body is unevenly distributed to one side in the left and right direction, there is play or deflection that exists in the connecting rods that interlock with the left and right swing wheels, and play that makes it easier to insert the locking pin into the engagement hole. The machine body tilts toward the side where the center of gravity is unevenly distributed by the amount of free movement between the left and right swing wheels due to the accumulation of gaps, etc., and when the machine runs in a field with the tiller in a horizontal state, the machine meanders.
There is a drawback that the seedling planting rows meander.

This invention was devised to solve the above-mentioned drawbacks, and its purpose is to always prevent meandering of the rice transplanter machine whose center of gravity is unevenly distributed in either the left or right direction. To provide a wheel up-and-down device for a rice transplanter that enables orderly planting.

The wheel up-and-down device of the rice transplanter of the present invention, which is distantly related to the above object, is a rice transplanter in which the center of gravity of the machine body is unevenly located in either the left or right direction from the center of the machine body, and one end of the left and right swing cases that support the wheels. A swinging rod in the left-right direction that pivots on both sides the other end of the connecting rod on which the wheel lifting device is pivoted is provided to be swingable about a fulcrum shaft attached to a telescoping shaft extending in the front-rear direction of the wheel lifting device. In a structure in which the left and right sides of the swing wheel can be switched between the same height state and the stepped state through locking pins that are selectively inserted into a plurality of retaining holes provided on one side of the swinging rod, The machine is characterized in that the engagement hole that brings the left and right swing wheels to the same height is biased in a direction that lowers the wheel on the side where the center of gravity is unevenly distributed, so as to hold the aircraft horizontally. be.

To explain the structure of the present invention with reference to an embodiment shown in the drawings, 1 is a rice transplanter main body, an engine 2 is mounted on the front part of the machine, and an operation control bundle 3 is mounted on the rear part diagonally upward. The bundle 3 is extended outward, and a seedling stand 4 is installed in front of the bundle 3 so as to be low in the front and high in the rear.

Reference numeral 5 denotes a seedling division and planting mechanism, and the planting claws 6 of the seedling division and planting mechanism 5 perform unit planting from the mat-like clustered seedlings placed on the seedling platform 4 by tracing a predetermined movement trajectory. It works by dividing the seedlings into seedlings and planting them in a circle.

7 is a circular sliding body; 3 is a swing case; the base end of the swing case 8 is pivoted to be vertically swingable via a horizontal horizontal shaft 9; A swing wheel 10.10 is pivotally supported, and the swing wheel 10.10 rotates in conjunction with the rotation of the engine 2.

Reference numeral 11 denotes a wheel lifting device, and the wheel lifting device 11 includes a hydraulic cylinder 12, a hydraulic ram 13, a telescoping shaft 14 integrally projecting from the hydraulic ram 13, and a hydraulic pump (not shown).
By operating a control lever 15 provided on one side of the operating bundle 3, the telescopic shaft 14 is extended and contracted in the longitudinal direction of the aircraft body.

16 is a fulcrum member slidably attached to the telescopic shaft 14, and the fulcrum member 16 has a fulcrum shaft 16 in the vertical direction.
a is projected, and the fulcrum member 16 is ejected by a projectile 17 fitted to the telescopic shaft 14.

17a and 17b are seats for the ammunition. Reference numeral 18 denotes a swinging rod having a U-shaped cross section, and a groove 19 is provided at the center of the swinging rod 18, and a notch 20 is made of cedar bark. The fulcrum shaft 1 of the fulcrum member 16 is loosely fitted onto the telescopic shaft 14 and is formed by the notch 20.
6a, and is configured to be swingable in the horizontal direction.

Connecting rods 21.22 are pivotally connected to both left and right ends of the swinging rod 1B, and the other ends of the connecting rods 21.22 are connected to the swinging rod 21.22 provided on the horizontal transverse shaft 9 of the swing wheel 10.10. It is pivotally connected to a movable arm 23.23, and both left and right ends of the swing rod 18 are operatively connected to left and right swing wheels 10.10, respectively.

21a and 22a are pivot pins that pivotally connect the swinging rod 1B and the connecting rods 21 and 22.

Since the connecting rods 21 and 22 move vertically and horizontally, both ends of the connecting rods 21 and 22 are pivotally connected with a certain amount of play.

Reference numeral 24 denotes a locking member provided at the free end of the connecting rod 21, and the tongue-shaped tip of the locking member 24 extends into a long hole 25 provided at the end of the swinging rod 18. and the long hole 2
The left and right side edges 25a of 5.

The contact between the locking member 25b and the locking member 24 restricts the left and right swinging of the swinging rod 1B.

Reference numeral 26 denotes a locking mechanism for fixing the swinging rod 18 and the connecting rods 21.22, that is, for integrating the left and right swing wheels 10.10.
Consisting of a locking pin 27 attached to a boss 24a provided at the base of the swinging rod, and three engaging holes 28a, 28b, and 28C provided at one end of the swinging rod 18. These engaging holes 28 a, 28 b, 28
By selectively inserting the locking pin 27 into C, the left eye swing wheel 10.10 can be switched between a state of the same height and a state of a difference in height.

That is, these three engagement holes 28a, 28b,
28 C, two outer engagement holes 28 a, 28
C engages with the locking pins 27 while swinging the swinging rods 18 at the same angle on the left and right using the fulcrum shaft 16a as a fulcrum, thereby fixing the swing wheels 10.10 in a stepped state between the left and right sides. ing.

That is, in a state where these two engagement holes 28a and 28C are engaged with the locking pin 27, respectively, the swinging rod 1B and the connecting rod 21
．． 22 and between the connecting rod 21.22 and the swing arm 23.23, the swing wheel 10.10 includes an idle valve that is generated between the left and right swing wheels 10.10 due to the accumulation of play, etc. between the connecting rod 21.22 and the swing arm 23.23. The aircraft is supported by maintaining the same level difference between the two.

The inner engagement hole 28b located between the two outer retention holes 28a and 28C is connected to the swing wheel 10.1.
0 is fixed at the same height on the left and right sides, but in particular, the swinging rod 18 engages with the locking pin 27 while being slightly inclined to either the left or right with the fulcrum shaft 16a as a fulcrum.

That is, as shown in FIG. 4, the retaining hole 27 moves from the center position of the two outer engaging holes 28a and 28C to the center of gravity of the machine by a distance δ corresponding to the free movement between the left and right swing wheels 10 and 10. The engagement hole 28a is configured to lower the swing wheel 10 on the side where the center of gravity is unevenly distributed according to the eccentricity of the left and right side>ftV%D.

28a, and the engagement hole 28b
When engaged, the machine body is prevented from tilting by the amount of play between the swing wheels 10 and 10 due to the eccentricity of the center of gravity of the machine, and is held horizontally.

29 is a return spring for the locking pin 27; 30 is a wire connected to the locking pin 27; the wire 30 is connected to an operating lever 31 provided on the driving bundle 3; By the operation, the locking pin 27 is disengaged from the engagement holes 28a, 28b, and 28C.

Next, the operation of the present invention constructed as described above will be explained.

For normal rice planting work on a flat surface, use the operating lever 3.
1, the locking pin 27 is inserted into the second retaining hole 28b.
Insert it into.

In this state, the left and right swing wheels 10.10 are integrated via the swinging rod 18, the connecting rod 21, 22, etc., but between the left and right swing wheels 10.10, the connecting rod 21.
．． Since there is play equivalent to the accumulation of play and deflection in the 22, etc., it is necessary to simply insert the inner engagement hole 28 as in the conventional case.
In the case where the hole b is provided in the center between the two outer engagement holes 28a and 28C, as shown in FIG. Since the swing wheel 10 has moved upward by that much relative to the aircraft body, the left and right swing wheels 10°10 are not at the same height relative to the aircraft body, and the aircraft body is held at an angle with respect to the horizontal ground. However, in the present application, the engagement hole 28 b
is offset by a distance δ corresponding to the free movement between the left and right swing wheels 10.10 from the center position of the two outer engagement holes 28a and 28C, depending on the eccentricity of either the left or right of the center of gravity of the machine. As shown in Figure B, since the upward movement of the swing wheel 10 on the G side of the center of gravity of the machine can be compensated for, the machine body can be held horizontally with respect to the horizontal ground, and therefore, the machine body can be held horizontally on the horizontal ground. This prevents meandering and allows for smooth and proper running.

In this state, operate the operating lever 15 to raise and lower the wheel lifting device 11.
When the telescopic shaft 14 is telescopically operated, the telescopic shaft 14 simultaneously moves the left and right swing wheels 10, 10 up and down via the swinging rod 18, connecting rods 21, 22, etc., thereby raising and lowering the aircraft.

During rice transplanting, the swing rod 1 is used to deal with irregularities in the field.
The swing wheels 10, 10 are cushioned by the bombs 17 that eject the swing rods 18, allowing the aircraft to run smoothly.

In addition, when the left and right swing wheels are held at different relative heights to the machine body to hold the machine horizontally, such as when the plowing platform runs along a sloping ridge, etc., the locking pin 27 from the engagement hole 28b, and tilt the machine to the left and right with the driving bundle 3 against the horizontal ground.
The swing wheel 10 on the tilting side of the aircraft moves upward, and the swinging rod 18 is accordingly swung via the connecting rod 21 or 22.
As a result, the swinging wheel 10 on the opposite side moves downward via the connecting rod 22 or 21, and the swinging of the swinging rod 18 causes the locking member 24 to move toward the side end 25a or 25a of the elongated hole 25.
5b, this restricts the swinging of the swinging rod 1B, so that the alternating vertical and downward swinging of the swing wheels 10.10 is stopped. When inserted into the engagement hole 28a or 28C, the swinging rod 1 is integrated with the connecting rod 21.22, and the left and right swing wheels are held at different heights relative to the fuselage. be.

In any case, when the two outer engaging holes 28a or 28C are engaged,
Since the swing wheels on the upward movement side move upward including the free movement between the left and right swing wheels, the height difference between the swing wheels 10 and 10 can be kept the same.

In short, the present invention is a rice transplanter in which the center of gravity of the machine body is unevenly distributed in either the left or right direction from the center of the machine body, and the rice transplanter has a connecting rod with one end pivotally supported on the left and right swing cases supporting the wheels. A swinging rod in the left and right direction, whose ends are pivoted on both sides, is provided to be swingable about a fulcrum shaft attached to a telescoping shaft extending in the front-rear direction of the wheel lifting device, and provided on one side of the swinging rod. The left and right swing wheels are configured to be switchable between the same height state and the stepped state through locking pins that are selectively inserted into a plurality of retaining holes, wherein the left and right swing wheels are set at the same height. The structure is such that the machine body is held horizontally by shifting the engagement hole in the direction of lowering the wheel on the side where the center of gravity is unevenly distributed, so that the center of gravity position of the machine body is unevenly distributed in either the left or right direction. Even if the rice transplanter is equipped with a rice transplanter, the engaging hole on the swinging rod side that brings the left and right swing wheels to the same height should be biased in the direction of lowering the swing wheel on the side where the center of gravity is unevenly distributed. This allows you to maintain the machine in a horizontal state, prevent it from meandering, and plant in an orderly manner.

[Brief explanation of the drawing]

The drawings show an embodiment of the wheel up and down device for a rice transplanter according to the present invention, and FIG. 1 is an overall side view of the rice transplanter, and FIG.
The figure is a plan view of the main part, Fig. 3 is a side view, Fig. 4 is an enlarged plan view of the main part, Fig. 5 is a perspective view, and Fig. 6 is a side view of the main part.
7 is a cross-sectional view taken along the line B-B, and FIGS. 8A and 8B are partially planar and partially side views explaining the operation. In the figure, 1 is the main body of the transplanter, 4 is the seedling stand, 5 is the planting device, 8 is the swing case, 10 is the swing wheel, 11 is the wheel lifting device, 12 is the hydraulic cylinder, 13 is the hydraulic ram, and 14 is telescopic. A shaft, 16 a fulcrum member, 17 a bullet, 18 a swinging rod,
21. 22 is a connecting rod, 23 is a swing arm, 24 is a locking member, 25 is a long hole, 26 is a locking mechanism, 27 is a locking pin, 2
8 a, 28 b, and 28 c are engagement holes, 30 is a wire, and 31 is an operating lever.

Claims (1)

[Scope of utility model registration request] This is a rice transplanter in which the center of gravity of the machine body is unevenly located to either the left or right side from the center of the machine body, and the other end of the connecting rod is pivoted on both sides, with one end pivoted to the left and right swing cases that support the wheels. A swinging rod in the left and right direction is provided to be able to swing freely about a fulcrum shaft attached to a telescoping shaft extending in the front-rear direction of the wheel lifting device, and a plurality of engagement holes provided on one side of the swinging rod. In a structure in which the left and right swing wheels can be switched between a state of the same height and a state of a difference in height through a locking pin that is selectively inserted into a locking pin, an engagement that brings the left and right swing wheels into a state of the same height. A wheel up-and-down device for a rice transplanter, characterized in that the machine body is held horizontally by having holes biased in a direction that lowers the wheels on the side where the center of gravity is unevenly distributed.