JPH02249730A - Dumping stand structure for work vehicle - Google Patents

Abstract

PURPOSE:To increase the loading capacity and simplify the discharging work and the like by swinging to enlargement the rear plate of a dumping from a semi-open position to a full-open position together with dumping operation, and at the same time, the rear side plate to a fully closed position under the condition of the connection engagement of swing in enlargement having been released, and releasing the fixation. CONSTITUTION:The rear side plate 9 of a dumping stand D is provided swingably in changeover around a sidelong axis core X2, extending respectively for a full-open position whose level is the same as the bottom surface 10 of the dumping stand D, a fully closed position which meets at right angles with the same bottom surface 10 and a semi-open position which is in the middle of these. And at the time of the dumping operation of the dumping stand D, the engagement of a fixing pin 15 and a hook portion 13 constituting an operation enlargement connection engagement mechanism 11, is released, and the rear side plate 9 is swung in linkage by means of the partial butting of the fixing pin 15 and the guide surface 12a of a guide portion 12. Also, under the condition of the connection engagement release of the above mechanism 11, the fixing pin 15 is inserted into a bracket 14 so as to be able to be inserted/disinserted. Further, after the rear side plate 9 is made to be closed fully, the fixing pin 15 is inserted into the bracket 14, and the rear side plate 9 is regulated to a fully closed position.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a dump platform structure for a working vehicle such as a reaping and tying machine equipped with a collection device for loading and recovering bundles of culms bound after harvesting.

[Conventional technology]

As shown in the above-mentioned conventional dump platform structure, for example, as shown in Japanese Utility Model Application Publication No. 63-173028, the rear plate of the dump platform is fixed in a fully closed state during recovery and transportation work, and is released from the fixation when the dump is operated. There was one that had a structure that allowed it to swing open backwards.

[Problem to be solved by the invention]

However, with the conventional structure described above, the fixation of the rear side plate must be released each time the recovered items are discharged outside the machine after loading and recovering, which has the disadvantage of lowering work efficiency and reducing maximum efficiency. Increasing the payload capacity also had the disadvantage of making the aircraft longer and larger.

The present invention aims to increase the loading capacity without increasing the size of the machine, reduce the work burden when discharging collected materials, and improve work efficiency.

[Means to solve the problem]

A feature of the present invention is that a rear side plate is pivotally supported on the dump bed, and the rear side plate can be set at a fully open position where it is substantially flush with the bottom surface of the dump bed, a fully closed position where it is approximately perpendicular to the bottom surface, and a fully open position. and a half-open position located between the fully closed position and a half-open position located between the fully closed position and the fully closed position. An operation expansion linkage mechanism for expanding and swinging from the half-open position to the fully open position is provided, and a fixing means is provided that can fix and release the rear side plate at the fully closed position when the operation expansion linkage mechanism is disengaged. The functions and effects are as follows.

[For production]

That is, by setting the rear side plate to the half-open position during the loading and recovering operation, the maximum loading amount can be increased as much as possible. Furthermore, when discharging the cargo to the outside of the aircraft after the maximum load has been recovered, the rear side plate and the bottom surface become approximately flush with each other by the operation expansion linkage mechanism, allowing smooth discharging by simply operating the dump bed. .

Moreover, by fixing the rear side plate in the fully open position when the vehicle is not in operation, the bulkiness toward the rear can be eliminated and the vehicle can be stored compactly.

〔Effect of the invention〕

Therefore, according to the present invention, it is possible to increase the number of loads and recoveries in the recovery section without increasing the size of the aircraft, reduce the number of discharge operations as much as possible, and operate the dump bed during the discharge operation. This greatly improves work efficiency as there is no need for the operator to get off the aircraft each time.

In addition, when bringing the rear side plate to the fully open position, it is necessary to release the linkage of the operation expansion linkage mechanism, but this only needs to be done at the end of the work, and it does not need to be done frequently and does not pose a work burden. be.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

FIGS. 5 and 6 show a reaping and tying machine with a collection device, which is an example of a working vehicle according to the present invention.

This reaping and tying machine has a reaping pre-processing section (A) of the same type as the combine harvester connected to the front part of a traveling machine based on a combine harvester, and a tying bag R (B) is attached to the rear left side of the reaping pre-processing section (A).
, and a boarding operation section (1) at the rear right side, and a clamp-type lifting and aging device N (C) at the rear of the binding device (B), and is approximately box-shaped with an open top at the rear of the fuselage. The structure includes a dump platform (D).

The reaping pre-processing section (A) includes a pulling device (2) that pulls up the planted stem culm into a vertical position, a backer (3) that scrapes the stem culm backward while gathering the stem culm in the center, and a backer (3) that pulls the stem culm backward while gathering the stem culm in the center. It consists of a clipper-type reaping device (4) for cutting, a vertical fine-feeding device (5) for conveying the vertically cut stem culm backward while gradually changing its posture to a sideways posture. Then, the vertical shooting equipment (5
), the stem culms in a sideways posture are transported by the binding device (
After binding by B), the lifting and conveying device (C)
The chain with protrusions (6) and the clamping rail (7) clamp and transport the tied stem culms in a sideways posture upward and backward, and drop them from the upper end into the dump platform (D) to be loaded and recovered. It is structured like this.

A hydraulic cylinder (8) is pivotally connected between the center of the lower surface of the bottom of the dump platform (D) and the body.
), the dump bed (D) is stably placed on the aircraft body in a recovery action position and the horizontal axis of the rear lower part (XI)
The dumper is configured to be able to swing freely between the stem and culm bundle release position where it swings backward and upward around the dump.

Then, the rear side plate (9) of the dump bed (D) is relatively swingable around the horizontal axis (x2) at the rear lower part of the dump bed (D).
A fully open position where the rear side plate (9) is substantially flush with the bottom surface (10) of the dump bed (D), and a fully closed position where the rear side plate (9) is substantially perpendicular to the bottom surface (10); It is provided to be able to freely switch and swing around the horizontal axis (x2) between the fully open position and a half-open position located between the fully open position. Further, an operation expansion linkage mechanism (11) is configured to expand and swing the rear side plate (9) from the half-open position to the fully open position as the dump bed (D) swings due to the dump operation.
) is provided.

Specifically, as shown in FIGS. 1 and 4, a guide portion (12) is provided extending below the right pivot axis of the rear side plate (9), and a proximal hook of this guide portion (12) is provided. (13) is engaged with the fixing pin (15) supported by the bracket (14), and when the dump bed (D) is in the loading position, the rear side plate (9) is The structure is such that the position is restricted to a half-open state, and consideration is given to increasing the maximum loading capacity of the stem and culm bundles as much as possible.

Then, when the dump bed (D) is operated for dumping, the engagement between the fixed bin (15) and the hook part (13) is released, and the rear side plate (9) is moved between the fixed bin (15) and the guide part ( The structure is such that the relative rotation in the dumping direction is restricted by the uneven contact of the guide surface (12a) of 12), and the interlocking movement is performed (see FIG. 2).

At this time, the pivot axis (x2) of the rear plate (9) is configured to move away from the fixed bin (15) as the dump bed (D) swings, and the rear plate (9) swings. The operation expansion linkage mechanism (11) is configured such that the operating angle is larger than the swinging angle of the dump platform (D).

Further, a fixing means is provided which can fix and release the rear side plate (9) at the fully open position when the operation expansion linkage mechanism (11) is released from the linkage. That is, the fixed bin (15) is configured to be able to be inserted into and removed from the bracket (14), and when the fixed bin (15) is removed, the rear plate (9) is manually moved to the fully closed position. After changing the position, by reinserting the fixing pin (15), it comes into contact with the lower front edge of the pivot axis (x2) of the rear plate (9) and restricts the position to the fully closed position. (See Figure 3). That is, the fixed bin (15)
constitutes the fixing means.

[Another example]

■ The operation expansion linkage mechanism (11) is shown in Figures 7 and 8.
As shown in the figure, the fuselage pivot side bracket (16) of the hydraulic cylinder (8) and the bracket pin-engaged with the rear side plate (9) through a long hole are released using a rod (17). The rear side plate (9) may be configured to be linked in such a manner that the position of the rear side plate (9) is restricted at the half-open position and the fully open position.

■ As shown in FIG. 9, the operation expansion linkage mechanism (11) fixes a small-diameter fixed gear (1B) centered on the swing axis (xl) of the dump bed (D), and also A large-diameter planetary gear (19) is rotatably fixed to the rear side plate (9) around the swing axis (x2) of the side plate (9), and both gears (
It may be configured such that when gears 18) and (19) are engaged and a dump operation is performed, the swing angle is expanded according to the difference in diameter between both gears (18) and (19). Also, any of the gears (18).

(19) may be inserted and removed to change the position, and the rear side plate (9) may be engaged and fixed at the fully open position so as to serve as the fixing means.

(1) Further, the operation expansion linkage mechanism (11) is configured to swing the dump platform (D) and the rear side plate (9) individually using hydraulic cylinders, and is configured to have different swing drive strokes. You may.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of drawings]

The drawings show an embodiment of the dump bed structure for a working vehicle according to the present invention, and FIGS. 1 to 3 are side views of the main parts showing the operating state, FIG. 4 is a plan view of the main parts, and FIG. FIG. 6 is an overall plan view of the reaping and binding machine, FIGS. 7 and 8 are side views of main parts of another embodiment, and FIG. 9 is a main part of another embodiment. FIG. (9)...Rear side plate, (10)...Bottom surface, (11)...Operation expansion linkage mechanism, (D)...
...Dump loading platform.

Claims (1)

[Claims] A rear side plate (9) is pivotally supported on the dump bed (D), and the rear side plate (9) is placed in a fully open position where it is substantially flush with the bottom surface (10) of the dump bed (D), and the bottom surface (10) The dump platform (D ) is provided with an operation expansion linkage mechanism (11) that swings the rear side plate (9) from the half-open position to the fully open position in an enlarged manner, and the operation expansion linkage mechanism (11) is linked. A dump loading platform structure for a working vehicle, which is provided with fixing means that can fix and release the rear side plate (9) at the fully closed position when the rear plate (9) is released.