JP3310543B2 - Weeding rod support structure of agricultural machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an agricultural machine such as a combine or a binder, and more particularly, to a weeding rod for weeding planted cereals into a culm to be cut and a non-cutting culm.

[0002]

2. Description of the Related Art Conventionally, weeding rods for weeding planted cereals into a culm to be cut and a non-cutting culm are disclosed in JP-A-7-10784.
As shown in Japanese Patent Application Publication No. 1 (1995) -1995, on one lateral side of the fuselage, a rotatable posture is provided around a longitudinal axis, and the mode is switched between a retracted posture pulled toward the fuselage side and a weeding posture protruding laterally outward. It is configured to be possible. The switching mechanism of the weeding rod is composed of a long hole formed in the plate of the connecting rod as a weeding rotation support rod, a bolt on the machine body inserted into the long hole, and a coil spring externally fitted to the bolt. The weeding rod is rotatable within a certain range between the retracted position and the weeding action position, and can be frictionally held at any turning position according to the height and lodging of the grain stem. I have.

[0003]

In a state in which the weeding rod is frictionally held at an arbitrary rotation position in accordance with the height and the degree of lodging of the cereal stem, the weeding rod is not rotated when turning around a ridge or during cutting. When the work was interrupted and the breeding rod was rotated to remove the straw or culm entangled with the breeding rod, there was a problem that it was difficult to accurately restore the breeding rod to its original position. . Therefore, as a means for accurately restoring the weeding rod to its original position, a plurality of pin holes are provided on the plate of the weeding rotation support rod around the rotation axis of the weeding rod, and the pin hole is selected. A switchable configuration is conceivable, but in such a case, the rotation of the weeding rod involves the inconvenience of inserting and removing a pin.

[0004] It is an object of the present invention to enable the weeding rod to be accurately restored to its original position without the need to insert and remove a pin for the rotation of the weeding rod.

[0005]

[Action]

The rotation angle of the weeding rod is set in advance by a stopper according to the height and lodging of the culm. That is, the maximum projecting amount of the weeding rod to the working side is set. Thereby, the weeding rod can be switched between the standing storage position and the weeding operation position where the weeding rod is protruded to the maximum within the limited range regulated by the stopper,
Even when the weeding rod is rotated in order to remove the straw, cereal stem, and the like entangled in the weeding rod, the weeding rod can be accurately restored to the original position. [Effect] As a result of the above configuration, the rotation of the weeding rod does not involve the removal and insertion of the pin. Can be restored.

According to a second aspect of the present invention, the friction holding mechanism comprises a slot provided in one of the weeding rotation support rod and the body-side fixing portion and a slot insertion bolt provided in the other. The long hole insertion bolt comprises an externally fitted spring, and the stopper adjusts the limit on the weeding side of the long hole. [Function] The friction holding mechanism is formed by a slot provided on one of the weed rotation support rod and the body side fixing portion, a slot insertion bolt provided on the other, and a spring externally fitted to the slot insertion bolt. With this configuration, the slot insertion bolt for the friction holding mechanism can be used as a part of the regulating member that regulates the rotation range of the weeding rod. [Effect] As a result of the above configuration, the structure can be simplified and the cost can be reduced due to the shared use of the members.

According to a third aspect of the present invention, the stopper is supported so as to be rotatable about the rotation axis of the weeding rod and is engageable and fixed at a plurality of positions around the rotation axis. I have. [Operation] The rotation shaft of the weeding rod can be used also as the mounting shaft of the stopper. [Effect] As a result of the above configuration, the structure can be simplified and the cost can be reduced as the members are shared.

[0008]

FIG. 1 shows a front part of a body of a combine, in which a hydraulic cylinder 5 is used to attach a horizontal axis X to a front part of a body 4 having a crawler traveling device 1, a threshing device 2, and a control unit 3. It is provided with a pre-cutting device 6 that can move up and down.

The pre-cutting treatment device 6 includes a weeding tool 7 for weeding the root portion of the planted cereal culm, a raising device 8 for causing a lodging cereal culm, and cutting the raised root portion of the cereal culm. A clipper-type cutting device 9, a vertical transport device 10 that gradually changes the cut grain culm to a sideways posture and transfers it to the feed chain 2 a of the threshing device 2, and cuts the planted grain culm on one side of the machine body. It comprises a weeding rod 11 for weeding the target culm and the non-reap target culm.

As shown in FIG. 2, a weeding rod 11 provided on one lateral side of the fuselage is rotatable around a virtual axis P along the longitudinal direction of the fuselage, and the wedging rod 11 is protruded to the lateral lateral outside of the fuselage. It is configured to be switchable between a grass action position and a storage position drawn toward the fuselage.

The support structure of the weeding rod 11 will be described in detail. As shown in FIG.
a is inserted into a hole of a bracket 13 erected on the weed supporting rod 12, and is rotatably supported via a washer, a retaining pin and the like in a locked state.

As shown in FIGS. 3 and 4, the rear end side of the weeding rotation support rod 11A fixedly connected to the middle part of the weeding rod 11 in the front-rear direction, as shown in FIGS. 15 is connected to a bracket 16 as a fuselage-side fixing portion provided on the side surface of the vehicle 15 via bolts and nuts 17 and 18 so as to be relatively rotatable.

A plate 11B fixedly connected to the lower end of the weeding rotation support rod 11A is provided with a rotation axis P of the weeding rod 11, that is, an arc-shaped elongated hole 19 centered on the fulcrum bolt 17. On the other hand, the long hole insertion bolt 20 is fixedly provided on the bracket 16 of the vertical transmission case 15,
By contacting the end of the elongated hole 19 with the bolt 20, the rotation range of the weeding rod 11, that is, the rotation range of the sideways weeding action posture and the standing storage posture is set to approximately 90 degrees. is there. Then, the ring 2 is attached to the slot insertion bolt 20.
1. A spring 22 and a washer 23 are externally fitted, and a nut 24 is screwed into the tip of a bolt 20. The weeding rod 11 is moved by a friction holding mechanism C composed of the ring 22, the spring 23, etc. It is configured to be able to hold friction at any rotational position in accordance with the degree of lodging.

The slot 1 is provided on the front surface of the plate 11B.
Hook-shaped stopper 25 that limits the allowable range of 9
The weeding rod 11 is provided coaxially with the rotation axis P of the weeding rod 11 so as to be fitted around the rotation fulcrum bolt 17 of the weeding rod. The long hole limiting stopper 25 has a fixing pin 25A on its free end side, and has four pin holes 26 formed in the plate 11B along an imaginary arc locus centered on the fulcrum bolt 17.
· It is configured so that it can be engaged alternatively. The hook-shaped stopper 25 includes a spring 27 externally fitted to the fulcrum bolt 17,
It is urged through the washer 28 toward the plate 11B. Therefore, when rotating the hook-shaped long hole limiting stopper 25, the hook-shaped long hole limiting stopper 25 is slid on the bolt axis against the urging force of the spring 27, and the engaging pin 25A is moved. This is done by extracting from the pin hole 26.

As shown in FIG. 6, in the weeding implement 7, the bracket 7A of the weeding implement 7 has a pair of front and rear bolts 27 and a pair of front and rear backwardly inclined postures with respect to the bracket 12A at the tip of the weeding support rod 12. With the long hole 12B, the front and rear and up and down adjustments can be performed simultaneously so as to be able to be moved in parallel.

[Alternative Embodiment] In the above-described embodiment, the long hole is provided on the plate of the weeding rotation support rod, and the long hole insertion bolt is provided on the bracket of the transmission case as the body side fixing portion. However, conversely, the slot may be provided by providing the slot in the bracket of the transmission case as the body-side fixing portion and the bolt for inserting the slot in the plate of the weeding rotation support rod.

Further, as shown in FIG.
The plate 11B of the weed rotation support rod 11A is rotatably mounted on the bracket 16 of the
The weeding rod is configured to be rotatable within a certain range between the retracted position and the weeding operation position by bending pieces 16A, 16A provided at both ends of the bracket 16, and the fulcrum bolt 17 is provided with a spring 2
2. Fit the washer 23 to the outside, and attach the nut 24 to the tip of the bolt 17.
And the weeding rod 11 can be frictionally held at an arbitrary rotation position by a friction holding mechanism C including the ring 22 and the spring 23.
A bolt 25 as a stopper for restricting the rotation range of the weeding rod is provided on one of A and 16A, and the maximum protrusion amount of the weeding rod 11 to the working side can be adjusted by adjusting the bolt 25. May be.

In the above embodiment, weeding rods of combine are described, but weeding rods of binder may be used.

[Brief description of the drawings]

FIG. 1 is a side view of the front of the combine.

FIG. 2 is a front view of the same.

FIG. 3 is a front view showing a weeding rod support structure.

FIG. 4 is an exploded perspective view of the same.

FIG. 5 is a longitudinal side view of the same.

FIG. 6 is a side view showing a mounting structure of the weeding tool.

FIG. 7 is a perspective view showing a second embodiment.

[Explanation of symbols]

 11 Weeding rod 11A Weeding rotation support rod 16 Airframe side fixing part 19 Slot 20 Bolt for slot insertion 22 Spring 25 Stopper C Friction holding mechanism P Rotation axis

Continuation of front page (58) Field surveyed (Int. Cl. ⁷ , DB name) A01D 63/04

Claims (3)

(57) [Claims] 1. A weeding rod is rotatably supported by a fuselage-side fixed portion in a fixed range between a retracted position and a weeding action position.
In a weeding rod support structure of an agricultural machine configured to be able to hold friction at an arbitrary rotation position by a friction holding mechanism, a switch for setting a rotation limit of the weeding rod to a weeding operation position side.
Provide a topper and change the position of this stopper
The weeding rod set within the certain range
The rotation limit is determined by the weeding action of the stowed position and the outermost
A weeding rod support structure of an agricultural machine configured to be adjustable at a plurality of positions between the positions . 2. The friction holding mechanism is externally fitted to an elongated hole provided on one of a weed rotation support rod and a fuselage side fixing portion, an elongated hole insertion bolt provided on the other, and an elongated hole insertion bolt. The weeding rod support structure for an agricultural machine according to claim 1, wherein the stopper adjusts a limit of a weeding action side of the long hole. 3. The weeding rod of an agricultural machine according to claim 2, wherein the stopper is rotatably supported about a rotation axis of the weeding rod and is engageable and fixed at a plurality of positions. Support structure.