JPH0132536Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a binding device for a combine harvester. Conventionally, there has been provided a variable binding device in which a scraping device is interposed between a discharging culm conveying device and a knotter, and the knotter can be moved in the direction of the culm to change the binding position of the discarded culms.

Conventional binding devices of this type include, for example, a type in which a knotter A and a raking device B move integrally in the direction of the culm, as shown in FIG.
As shown in the figure, a type is known in which the scraping device B is fixed and only the knotter A moves. However, in the former type, when the knotter A is displaced from the fixed position x to the stock side by y, the scraping device B
Since the amount of displacement is also the same y, the transfer of the culm from the raking device B to the knotter D of the knotter A is carried out well because the relative position between the two does not change. A and right scraping claw b of scraping device B
Since the distance between the culm A and the culm becomes very small (s), the cutting of the tip side of the culm A becomes difficult, and even if the notter A is displaced by an amount W toward the tip side from the state shown in Fig. 7, the Q dimension becomes very small. This causes the inconvenience that the stock size becomes smaller and the stock side is not able to squeeze in as much. On the other hand, with the latter type, when the knotter A is displaced, contrary to the above, the relative position between the scraping device B and the knot D of the knotter A changes greatly from the ideal relative position, so both Not only does this result in poor handover of the culm between the holes, but the knotter A is designed to improve the handover of the culm by making the rotational trajectories of the rake claws B and the pucker overlap in side view. Since the packer can only move within the range P where it does not interfere with the claw b, there arises a disadvantage that the permissible displacement of the notter A is reduced.

The present invention has been made to compensate for the above-mentioned drawbacks, and its purpose is that when the knotter is moved within a preset narrow range, only the knotter is displaced independently, and that range is If the knotter is moved over a large distance, the raking device is constructed so that it is displaced together with the knotter by the amount that the knotter is moved. By ensuring that the relative positions in the culm direction between the culm conveyor and the raking device do not deviate too much, the conveying action of the culm, which continues from the culm conveyor to the raking device and then to the knotter, is always maintained well regardless of the knotter position. An object of the present invention is to provide a tying device for a combine harvester that can increase the displacement tolerance of the knotter.

The structure of the present invention will be explained with reference to an embodiment shown in the drawings. A is a knotter, B is a scraping device, and C is a scraping device.
is a culm transporter, and the culm A transported by the culm transporter C is raked by a raking device B and transferred to a notter A.
After being transferred to the farm, they are bundled in predetermined amounts and released into the field. In addition, the culm conveyor C
A cutter E is arranged below the terminal side of the
By opening the cover E', it is also possible to shred the waste culms transported by the waste culm transporter C into a predetermined length with the cutter E without bundling them and discharge them to the field as they are.

The knotter A is supported by the frames 1 and 2 via holders 3, 3a, 3b, and 3c so as to be movable and fixed in the culm direction, and by changing the position of the knotter A, the binding position of the culms can be freely changed. It is configured with a variable knotter. 4 is a needle, 5 is a police car, 6 is a sensing door, and 7 is a discharge arm.

Reference numeral 8 denotes a drive shaft of the scraping device B, which has a hexagonal outer shape. Reference numeral 9 denotes a boss fitted to the drive shaft 8 so as to be slidable only in the axial direction, and an arm 12 having claws 11 and 11' pivotally supported at both ends thereof is fixed to the boss 9 through pins 10. ing. A holder 13 is loosely fitted to the drive shaft 8, and both ends thereof are supported by the boss 9 via bearings 14 so as to be relatively rotatable. Reference numeral 15 denotes a guide roller that is rotatably supported by the scraping claws 11, 11'. The rotation trajectory α is determined. 17,17'
are support arms with one end fixed to the left and right sides of the holder 13, respectively, and the other ends of the support arms 17, 17' are connected to the notter A side with respect to the frame 1 via bosses 18, 18' as shown in FIG. The holder 3 is slidably fitted with the holder 3 sandwiched between both sides. The holders 18, 18' are pressed from the outside by springs 19, 19', and by the action of these springs 19, 19', the scraping device B is always at a neutral position, that is, between the left and right scraping claws 11, 11'. The point (T/2 point) is held at a position that coincides with the conveyance end portion A of the culm conveyor C. 20, 20' are spring holders.

By the way, when the knotter A is positioned at the normal binding position (position where the needle 4 coincides with the x-ray) as shown in Fig. 2, the boss 1
Between 8, 18' and holder 3 are V and U (V≒
For this reason, boss 1 only moves when the movement range of knotter A is larger than V and U.
8 or 18' comes into contact with the holder 3 and the scraping device B
follows knotter A and moves laterally.
The above gap dimensions V and U are between scraping device B and notter A.
This is the maximum allowable range that does not interfere with the transfer of the culm between the two even if the relative position of the two changes.

In FIG. 2, 21 is a bolt for fixing the knotters provided on the holders 3b and 3c, and 22 is an input shaft of the knotter A, which is spline-engaged with a main shaft 23 to which a sprocket 23a is fixed.
24 and 25 are power transmission belts, and 26 is a power transmission chain. In FIG. 1, β is the rotation locus of the police car 5.

F in the figure is the threshing part of the combine harvester.

In the configuration as described above, in order to change the binding position of the culm, loosen the bolts 21 and 21 and attach the knotter A.
Knotter A when moved from the fixed position of x in Fig. 2 by y toward the plant base or by z toward the tip.
Looking at the change in the relative position between Knotter A and scraping device B, first, if the displacement amounts y and z of Knotter A are within the range of gaps V and U between bosses 18 and 18' and holder 3, respectively, then Knotter A only moves alone,
The scraping device B is still held stationary in the neutral position by the action of the springs 19, 19'.
Therefore, in this state, the relative position between the raking device B and the culm conveyor C does not change from the ideal relative position shown by the solid line in FIG. It shifts in the direction of the culm by the amount of displacement A. However, within the range of gaps V and U, even if the relative positions of both B and A change, the culm transfer function between both B and A is not hindered. From C to scraping device B
Next, the transfer of the culm to the knotter A is carried out extremely smoothly.

Next, when the displacement amount y, z of the knotter A exceeds V, U, the holder 3 comes into contact with the boss 18 or 18', and from the moment of contact, the raking device B
is pressed against the spring 19 or 19' and moves toward the culm integrally with the knotter A (the third
(See Figure 4). Scraping device B in this state
Since the amount of displacement is small (y-V) toward the plant head side and (z-U) toward the tip side, there is a change in the relative position between the raking device B and the culm carrier C. can be kept to a small amount. Therefore, even in this case, it is possible to reliably prevent the scraping and inheritance effect of the scraping device B from becoming extremely poor on the plant side or the tip side, and the scraping culm can be transferred to The transfer from C to the knotter A can be carried out smoothly and orderly without disturbing the conveyance posture.

Note that when the knotter A is returned to the normal position shown in FIG.
It is automatically restored to the neutral position by the action of .

As described above, the present invention has a raking device interposed between the culm conveyor and the knotter, in which the knotter and the raking device are configured to be separate and movable in the culm direction, and When the knotter is moved within a predetermined narrow range, the scraping device remains stationary at a preset neutral position and only the knotter is displaced independently, and when moved beyond the predetermined range, the knotter is moved. Since the knotter and the raking device are connected to each other so that the raking device is displaced integrally with the knotter from the point when the knotter is moved beyond a predetermined narrow range, when the knotter is moved in the direction of the culm within the predetermined narrow range, the raking device is moved in unison with the knotter. Not only can the device and the culm conveyor be maintained in an ideal relative position, but even when the knotter is moved far beyond a predetermined range, the amount of displacement of the raking device itself is minimized. It is possible to suppress the relative positional deviations between the knotter and the raking device and between the raking device and the culm conveying body in the culm direction to a small amount that does not interfere with the transfer and conveyance action of the culm. This not only makes it possible to always smoothly and reliably carry out the transfer and conveyance of the culm from the culm conveyor to the raking device and then to the knotter, regardless of the magnitude of the displacement of the knotter, but also to It is possible to eliminate the inconvenience that the amount is restricted by the rotation locus of the scraping device, and the degree of freedom in the binding position of the culms can be greatly increased, and the structure is simple and can be manufactured at low cost.

[Brief explanation of the drawing]

Fig. 1 is a side view of the present invention, Fig. 2 is a plan view, Figs. 3 and 4 are explanatory views of the main parts, respectively, and Figs. 5 and 6 are enlarged sectional views and side views of the scraping device. figure,
7 and 8 are plan views showing conventional examples, respectively. In the figure, A is a knotter, B is a scraping device, and C is a culm conveyor.

Claims (1)

[Scope of utility model registration request] In the device in which a scraping device is interposed between the culm transporting body and the knotter, the knotter and the scraping device are configured to be separate and movable in the direction of the culm, and the knotter is moved within a predetermined narrow range. When the device is moved, only the knotter is displaced independently with the device remaining stationary at a preset neutral position, and when the device is moved beyond a predetermined range, the device starts scraping from the point at which the knotter exceeds the predetermined range. A tying device for a combine harvester, characterized in that a knotter and a raking device are constructed in relation to each other so that the tying device is displaced integrally with the knotter.