JPS6117450B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to safety measures for a feed chain installed in a threshing machine mounted on a combine harvester.

For example, when you are handling grain culms on the headland, if the grain gets stuck in the feed chain opening or if a part of your clothing gets caught in the feed chain, you should immediately remove it from the handling position. For safety reasons, it is necessary to cut off the feed chain drive.

Therefore, conventionally, as seen in Japanese Patent Application Laid-open No. 51-91155, a clutch for intermittent driving of the feed chain was provided in the feed chain drive system, and the clutch was made operable at the manual work position. We are striving to ensure safety.

However, although safety can be achieved with the above-mentioned means, there is a drawback that safety measures are expensive because an expensive clutch such as a pawl clutch is installed.

Also known is the one disclosed in Japanese Utility Model Publication No. 31-5252. This is done by inserting and removing the fixed key of the operating rod inserted into the keyway provided on the drive shaft into the keyway of the pipe-shaped gear shaft provided on the outer periphery of the drive shaft, thereby connecting and disconnecting the two shafts. It is something to do. Therefore, a rather large force is required to slide the operating rod when separating the two shafts,
In addition, since the operating rod also rotates together with the drive shaft, it is difficult to operate the operating rod, making it unsuitable for separating the two shafts in an emergency.

The present invention aims to implement safety measures at an extremely low cost by effectively utilizing the feed chain drive system.

Hereinafter, embodiments of the present invention will be described based on the drawings. FIG. 1 shows a combine harvester equipped with a threshing machine, and FIG. 2 shows a feed chain drive section.

In the figure, reference numeral 1 denotes a feed chain installed along the side of the threshing machine, which is hung between a driving sprocket 2 on the grain culm opening a side and a driven sprocket 3 on the rear side of the threshing machine.

4 is a feed chain cover, and on the outer surface of this cover 4 are a driving side sprocket 5, an input sprocket 7 for the feed chain driving sprocket 2, and a transmission chain 6 hanging from both of these sprockets 5, 7. Chain case A for driving the feed chain is installed.

As shown in detail in FIG. 2, the feed chain driving sprocket 2 and the input sprocket 7 corresponding thereto are provided concentrically and rotatably separately, and the rotational power of the input sprocket 7 is transferred to the feed chain. Drive sprocket 2
A power transmission shaft 8 is spline-fitted in the axial direction to both sprockets 2 and 7, and by separating the power transmission shaft 8 from the feed chain driving sprocket 2, the power transmission to the sprocket 2 is stopped. It is now possible to release the .

Although the transmission shaft 8 is spline-fitted to both sprockets 2 and 7, an appropriate structure may be used, such as, for example, the transmission shaft 8 is a hexagonal shaft and both sprockets 2 and 7 are provided with corresponding hexagonal holes. Of course, it is possible to adopt

Now, a circumferential groove 8a is formed on the outer end side of the transmission shaft 8, and an L-shaped operating lever 9, which has a fork-shaped portion at one end that engages with the circumferential groove 8a, is operated in the direction in which the combine harvester moves. It is attached to the outer surface of the chain case A with a support shaft P behind the transmission shaft 8. By pushing the operation lever 9 around the support shaft P in the direction of grain flow in the manual handling position and disengaging the transmission shaft 8 from the feed chain drive sprocket 2, the power to the sprocket 2 is applied. A transmission release state that cuts off transmission can be created, and the operation lever 8
By returning the transmission shaft 8 to its original position and spline-fitting the transmission shaft 8 to the sprocket 2, it is possible to create a transmission state in which the rotational power of the input sprocket 7 is transmitted to the feed chain drive sprocket 2. There is.

Next, reference numeral 10 denotes a handling aid, which is shown in its first position (indicated by a solid line) in which it is raised to a position where it does not interfere with the harvested grain culm sent from the lifting device 11 side, and its free end is in the above-mentioned scooping opening. It is pivotally connected to the upper end of the lifting device 11 so as to be able to freely switch to the second posture (indicated by imaginary lines) lowered to a position a, and the first posture is maintained as shown in FIG. A spring 12 is provided, so that when handling grain culms, etc. on the headland, the auxiliary tool 10 is used as a mounting pedestal for the grain culm to be handled, and the grain culm is placed thereon, and the spring 12 is installed. 1
The auxiliary tool 10 is pushed up against the urging force of 2 to reveal the second posture, and then the grain culm to be handled is inserted into the opening a.
It has a two-movement operation of pushing down the auxiliary tool 10 and feeding the grain culm by hand, so that the worker can be accurately convinced that the grain is being handled manually, and furthermore, This feature is useful for improving the safety of manual work by reminding people to be careful during manual work.

As explained above, the present invention provides a feed chain for a combine harvester in which a sprocket for driving the feed chain at the grain culm opening and an input sprocket for the sprocket are provided concentrically and rotatably separately, and both sprockets A transmission shaft that is slidable only in the axial direction relative to the sprocket is provided so as to be freely switchable between a transmission state across both sprockets and a transmission release state in which the transmission is released from the feed chain drive sprocket, and the transmission shaft is slidably operated. In order to do this, an L-shaped operating lever, one end of which is engaged, is pivoted behind the transmission shaft in the direction of movement of the combine, and is provided on the outside of the input sprocket. It has characteristics.

That is, the transmission shaft for the feed chain drive sprocket is configured to be slidable only in the axial direction, and the drive of the feed chain is cut off at the manual work position. without having to equip an expensive clutch.
By using the feed chain drive system as it is and making simple modifications, it has become possible to take safety measures at an extremely low cost. Since the operating lever is L-shaped, it is possible to rotate the lever using a relatively small force as a fulcrum and slide the transmission shaft, making it possible to quickly and reliably stop the feed chain in an emergency. can. Also,
One end of the operating lever protrudes slightly to the side of the combine, but its pivot point is behind the transmission shaft as mentioned above, so if the operating lever is touched by someone while the combine is running, The shock can be alleviated by rotating the operating lever toward the rear of the combine. Furthermore, when the operating lever is rotated as described above, the feed chain stops, so safety can be further improved.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a schematic side view of the entire combine, FIG. 2 is a detailed view of the feed chain drive section, and FIG. 3 is a plan view of the handling aid. 2...Feed chain drive sprocket, 7
...Input sprocket, 8...Transmission shaft, 9...
Operation lever, a... 按扼口.

Claims (1)

[Claims] 1 A sprocket 2 for driving the feed chain on the grain culm opening a side and an input sprocket 7 for the sprocket 2 are provided concentrically and rotatably separately, and an axial center is provided for both sprockets 2 and 7. A transmission shaft 8 that is slidable only in the direction is provided so as to be switchable between a transmission state that extends across both the sprockets 2 and 7 and a transmission release state that separates from the feed chain drive sprocket 2. For operation, an L-shaped operating lever 9, one end of which is engaged, is pivoted rearward of the transmission shaft 8 in the direction of movement of the combine.
A feed chain for a combine harvester, characterized in that it is provided on the outside of the input sprocket 7.