JPS6024113Y2 - Cutter safety device in combine harvester - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a safety device for a cutter for cutting waste straw that is installed in a combine harvester.

This type of cutter is dangerous if it is exposed, so it is usually covered entirely with a cover, but by covering it, even if the shredded waste straw becomes clogged inside the cover, it will not be able to be seen from the outside. This cannot be easily perceived, and even though the various devices are driving, only the cutter stops (generally, power transmission to the cutter is caused by belt transmission, which causes slippage), and the original cutting operation is interrupted. Not only that, but even after realizing that the filter is clogged, they suddenly forget to stop the device and suddenly insert their hand into the device and pull out the waste straw. When the blockage is slightly cleared, the cutter starts to rotate again because the drive force is still being transmitted to the cutter. This can lead to extremely dangerous situations, such as being pulled into the device, or fingers inserted into the device being directly cut off by the cutter.

Therefore, if a clog occurs, it could be detected and the detection operation would be linked to the disconnection operation of the clutch of the cutter drive unit.If this method is adopted, the work to clear the clog will be easier. It cannot be guaranteed that the clutch will sometimes engage unexpectedly, creating a dangerous situation for the operator.

Furthermore, in a combine harvester, even if a clog occurs and shredding becomes impossible, the threshing section in the previous stage continues to operate and continuously sends the threshed waste straw to the waste straw cutter chamber. The waste straw also becomes stagnant in the transfer path between the waste straw cutter and it is necessary to remove the blockage and also to release the stagnation of the waste straw, which is very time-consuming.

In this regard, the present invention addresses the current situation where, even if a clogging occurs and the clutch of the cutter drive unit is disengaged, various abnormalities caused by the clogging will occur as long as the processing work at the previous stage is interrupted. As a result of our consideration, we found that countermeasures against abnormalities in the waste straw cutter, which is part of a series of treatment systems, must be taken for the entire series of treatment systems. Based on this knowledge, we installed a retractable cover that covers the entire opening of the cutter except for the point where it flows into the cutter. The cover is configured to be opened by a pressing force when a blockage occurs on the upper side of the shredding portion of the cutter, and the engine mounted on the combine harvester is opened in response to the movement of the cover. The above problem was solved by linking the two in order to stop the problem.

Below, the embodiment of the present invention will be described in detail with reference to illustrative drawings.
2 is a threshing section, and 2 is hung horizontally on the side of the threshing section 1, which conveys grain culms by clamping them, inserts the tip side into the threshing section 1 to perform the threshing process, and threshes the processed waste straw. A feed chain 3 is used to extract waste straw from section 1 and convey it to the terminal end, and 3 is a waste straw extending rearward from the end of the feed chain 2, which takes over the waste straw transferred to the end of the feed chain 2 and subsequently transfers it to the rear. The transfer belt is located below the transfer end of the transfer bevel blade 3 and is located near the center in the length direction of the transferred waste straw, and is rotated to fold the waste straw stem culm in two. A folding wheel 4 is provided for transporting the folding wheel 4 downwardly, and directly below the folding wheel 4 there are two
The raking wheels 5, 5 for raking the folded and transported stem culms are provided facing each other, and the raking wheels 5,
A rotatably driven cutter 6 having a large number of cutting blades is provided below the cutter 5 .

Further, the folding wheels 4, the scraping wheels 5, 5, and the cutter 6 are covered with side plates 7 on the left and right sides thereof, and the upper part is covered with an open/close cover 8 in which only the waste straw inflow path on the transfer belt 3 is open. This cover 8 is rotatably supported on a side plate 7 above the shredding part of the cutter 6, and the straw removal is carried out inside the cover 8 and on the upper side of the shredding part in the direction of supplying the waste straw. When a blockage occurs, the cover 8 is configured to be rotated in the opening direction by the pressing force caused by the expansion of the waste straw, and the cover 8 is rotated in the opening direction.
The cutter chamber 9 is sealed when the cover 8 is closed with the side plate 7 and the side plate 7.
is formed.

Furthermore, a limit switch 10 contacts the inner surface of the cover 8 near the pivot position to close the circuit only when the cover 8 is closed, and is open when the cover 8 is rotated when a blockage occurs or when it is completely opened during inspection and repair. is attached to the outer surface of the side plate 7 facing the cover 8, and the limit switch 10 is provided in an engine stop circuit as shown in FIG.

In the figure, 11 is a battery, 12 is an engine plug provided in the engine (not shown) as a power source for the aircraft, and 1
Reference numeral 3 denotes an ignition device that boosts the voltage from the battery 11 to a voltage suitable for discharging and igniting the engine plug 12, and a contact 14 of the limit switch 10 is connected to the connecting line between the ignition device 13 and the battery 11. It is intervening.

The engine (not shown) drives all the devices on the machine body that require driving, such as the threshing section 1 and the cutter 6.

In addition, there is a pulling device at the front of the machine, a reaping device, and a vertical feed device.
Further, since the overall arrangement and specific structure of the traveling device etc. are well known, detailed explanation thereof will be omitted.

According to this configuration, if a blockage occurs in the cutter chamber 9 during the shredding operation of waste straw with the cutter chamber 9 covered with the cover 8, the cutter chamber 9 is filled with waste straw and the waste straw bulges out. The cover 8 is rotated in the opening direction by the pressing force.

Then, the limit switch 10, which had been in contact with the inner surface of the cover 8 and had closed the contact 14, no longer contacts the cover 8 and opens the contact 14. As a result, the ignition device 13 is removed from the battery 11 of the engine stop circuit. The line up to the line was cut, the engine (not shown) was stopped, and cutter 6
Not only that, but all moving parts on the aircraft will be inactive.

Therefore, if a blockage occurs, the threshing section 1 and the processing equipment before it, such as the hoisting device, reaping device, vertical conveyance device, etc.
In addition, the traveling equipment etc. are also stopped.In other words, the traveling of the machine itself is stopped and all the onboard equipment is stopped, so that waste straw does not stagnate and accumulate in front of the cutter chamber 9, and normal operations can be carried out. If the engine is stopped in the same state as the working state at one point in the engine, the worker can continue the work by opening the cover 8 and closing the cover 8 again to remove the blockage and starting the engine. It can be done.

In this case, since it is impossible to start the engine while the cover 8 is open, the engine will not start accidentally during inspection and repair of the cutter 6, and work can be carried out in an extremely safe condition. .

In the above-mentioned embodiment, when a blockage occurs, the cover 8 itself is pressed, but as shown in FIG. It may be provided along the path along which the straw is moved.

In this configuration, if a blockage occurs, the sensing portion 15 is pressed, forcing the cover 8 to rotate upward and opening the contact 14 of the limit switch 10, resulting in the same operation as in the above embodiment. It is.

In summary, the safety device for the cutter in the combine harvester of the present invention is to provide a pulling device and a reaping device at the front of the machine, a vertical conveyance device behind the device to convey the harvested husk to the threshing device, and a straw removal device to the threshing device. In a combine harvester in which cutters are arranged in series and a traveling device is provided below the machine body, each of these devices is mounted on the machine body and is operated by an engine. An opening/closing cover 8 is provided to cover the opening/closing cover 8, and the opening/closing cover 8 is configured to be opened by a pressing force when a blockage occurs on the upper side of the shredding portion of the cutter 6, and the opening/closing cover 8 is configured to be opened in response to the movement of the cover 8. Since both are linked to stop the engine installed in the combine, the following effects are achieved.

That is, when a blockage occurs, not only the cutter 6 but also the engine is stopped, so it does not stop only the cutter 6, but the entire processing series.
In other words, since the lifting device, reaping device, and vertical conveyance device stop everything including the threshing device, feed chain, and even the traveling device, there is secondary interference in the entire grain movement path up to the cutter. Not only does this prevent clogging, especially in the upper part of the cutter shredding section, but it also prevents the cutter from restarting as soon as you pick up the clogged waste straw and pull it out. It is safe because there are no drawbacks such as the hand or finger being pulled into the cutter shredding section with force and the hand or finger being accidentally cut off, or the cutter directly cutting off the hand or finger that is inserted into the device. In addition, once normal work is resumed, the cutter device is covered by the opening/closing cover, so there is no risk of the operator or auxiliary worker accidentally inserting their fingers into the device. Work can be carried out extremely safely, with the following features in particular:

In other words, when a blockage occurs in the cutter shredding section, the opening/closing cover is automatically opened by the pressing force of the straw removing the blockage, so by opening this cover, the operator and especially the auxiliary worker can avoid the occurrence of the blockage. Even if you can tell quickly that the operation of various devices has simply stopped, the cause may be the result of the engine rotation being temporarily stopped due to excessive running load or threshing load, etc.) Under such circumstances, the present invention can quickly identify whether the problem is a clogged straw removal straw or an excessive load on other equipment by looking at the open or closed position of the cover, and can quickly take appropriate countermeasures. It has the advantage of being easy to learn.

In short, the present invention provides a cover that opens due to a blockage with a function to stop the engine that drives the various devices of the combine and a function to notify that the cutter has become clogged. It is possible to work safely when removing a clog, and the feature is that it quickly informs the operator and auxiliary workers whether or not a clog has occurred, allowing them to carry out the work more efficiently as a whole. It exists.

[Brief explanation of drawings]

The drawings illustrate an embodiment of the safety device for a compactor and a cutter according to the present invention, and FIG. 1 is a side view of the entire main part, FIG. Figure 4 is an electrical circuit diagram that stops the engine in response to the operation of main parts.
The figure is a detailed side view of a main part of another embodiment of the present invention. 6...Cutter 8...Opening/closing cover
14...Contact.

Claims (1)

[Scope of utility model registration request] A pulling device and a reaping device are provided at the front of the machine, a vertical conveying device is provided at the rear to transport the cut husk to a threshing device, and a straw cutter is connected to the threshing device,
In a combine harvester having a traveling device provided below the machine body, each of these devices being mounted on the machine body and operated by a certain engine, the cutter 6 is provided with an opening/closing cover 8 that covers the entire opening except for the inflow pipe. , the opening/closing cover 8 is configured to be opened by a pressing force when a blockage occurs on the side above the shredding portion of the cutter 6, and
A safety device for a cutter in a combine harvester, characterized in that the cover 8 is coupled to stop the engine mounted on the combine harvester in response to the movement of the cover 8.