JPH0137400Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a handling depth sensor for a combine harvester that has good grain culm sensing ability.

In combine harvesters, a rod-shaped handling depth sensor is installed in the threshing section in order to detect whether or not the harvested grain culm is being properly supplied to the threshing section, or in that case, whether the handling depth is appropriate. It is hanging near the handling opening.

On the other hand, the harvested grain culm is grasped at the base of the grain by a conveyor chain, changed direction from an almost upright reaping position to a horizontal threshing position, and is conveyed to a handling port. Further, a conveying plate is provided to support and guide the tip portion from below to above, and its terminal end is guided to the handling port. The handling depth sensor described above is suspended above the conveyance plate, and senses by coming into contact with the tip portion.

By the way, since this conveyor plate is installed on the reaping section side, and the reaping section side rises when turning or driving on the road, there is a problem that the conveyor plate interferes with the fixed handling depth sensor each time. was occurring.
Therefore, it is necessary to provide a sufficient distance between the conveyance plate and the handling depth sensor, and this often results in a defect that the sensor fails to detect a small amount of grain culm.

Therefore, in this invention, the handling depth sensor is deformed so that it can be returned to its original shape, so that it can exhibit a sufficient sensor effect.

Hereinafter, specific embodiments of this invention will be described with reference to the drawings.

Figures 1 to 3 are a side view, a plan view, and a front view of a combine harvester equipped with a handling depth sensor according to this invention. It is equipped with a device 3, a conveyance device 4, etc. (reaping section 5).

The conveying device 4 is composed of a conveying chain 6 which is a chain body for grasping the stock head, a conveying plate 7 on which the tips are placed and guided, and the like.

By the way, the reaping section 5 as described above is supported by a support shaft 9 that is swingable about a pivot 8, and the other end of a hydraulic cylinder 10 whose one end is pivotally attached to the machine frame is connected to this support shaft 9. There is. Therefore, as the hydraulic cylinder 10 expands and contracts, the entire reaping section 5 swings (raises and lowers) about the pivot 8.

Next, a threshing section 11 is provided behind these reaping sections 5. The threshing section 11 is fixedly installed, and the rotating handling cylinder 12 and the feed chain 13 that moves the grain culm are provided with a lever 14 and the like. Further, the terminal end of the conveyance chain 6 of the reaping section 5 is configured to be taken over by the tip of the feed chain 13, while the terminal end of the conveyance plate 7 is connected to the threshing section 11.
is guided to the handling port 15.

By the way, this idea, as shown in Figure 4,
The rod 18 of the handling depth sensor 16 hanging down from the upper part of the handling port 15 is provided close to the upper part of the transfer plate 7, and as the rod 18 moves in the front-rear direction of the machine, the handling depth can be adjusted as described above. In the handling depth sensor 16 of the combine harvester, which is configured so that the sensor 16 performs a detection operation, the fifth to As shown in Figure 7, this rod 18
is configured such that its height and width can be deformed in the vertical direction, and it is configured such that it can be returned to its original shape upon cancellation of the interference.

Various configurations are possible for this configuration, but
Here are a few things.

FIG. 5 shows a type in which the rod 18 of the handling depth sensor 16 is made of an elastic material such as rubber, and when the conveyance plate 7 interferes with it, it bends and deforms, and returns to its original state when the interference is released. It is. That is, according to this structure, in order to prevent the handling depth sensor 16 from being damaged due to the interference of the conveying plate 7 with the handling depth sensor 16 due to the raising and lowering of the reaping section 5, and to withstand repeated use.
Furthermore, the handling depth sensor 16 can be changed in height and width in the vertical direction without affecting the detection operation of the sensor itself, and can be returned to its original shape as interference is removed.

FIG. 6 shows that the rod 18 of the handling depth sensor 16 is configured to be able to expand and contract up and down while being urged downward by a spring 20 or the like with a constant force.
Of course, when the grain culm passes over the conveying plate 7, it rotates around the central axis 17 and activates the micro switch 19.

The same is true for FIG. 7, which is an example without the spring 20. As described above, this invention is based on a combine harvester in which the reaping section 5 is pivotably supported on the threshing section 11 so as to be able to rise and fall freely, and a conveyor provided on the side of the reaping section 5. While guiding the terminal end of the plate 7 to the vicinity of the handling port 15 of the threshing section 11,
A handling depth sensor 16 hanging down from the upper part of the conveying plate 7 is provided close to the upper part of the conveying plate 7, and when the conveying plate interferes with the handling depth sensor 16 as the reaping part 5 moves up and down,
This handling depth sensor 16 is configured to be able to change its height width in the vertical direction without affecting the detection operation of the sensor itself, and is configured to be able to return to its original shape when interference is removed. A depth sensor 16 is provided.

Therefore, since the terminal end of the first conveying plate 7 can be guided to the vicinity of the handling port 15, there is no need to provide a space between the two, and the grain culms can be transported in an orderly manner and can be delivered to the handling port 15 without disturbance. can be supplied to

Next, the tip of the handling depth sensor 16 can be brought close to the top of the transport plate 7, and in some cases it can be brought into contact with it from the beginning, so there is no need to leave a large distance between the two. No matter how small a quantity of grain culms flows, it can be completely caught.

In addition, such a handling depth sensor 16 does not require any reset operation, is not troublesome to operate, and has the advantage that it can be installed easily and at low cost.

Furthermore, since the handling depth sensor is configured to be able to change the height width in the vertical direction without affecting the detection operation of the sensor itself, the required sensor electric circuit required for proper grain culm detection In addition, no special electrical circuit is required, and the depth sensor can be prevented from being damaged due to its simple structure, allowing it to be used repeatedly over a long period of time. .

[Brief explanation of the drawing]

The drawings show a specific example of this invention. Fig. 1 is a partial side view of a combine harvester to which this invention is applied, Fig. 2 is a plan view of the same, Fig. 3 is a front view of the combine harvester, and Fig. 4 is a partial side view of a combine harvester to which this invention is applied. FIGS. 5 to 7 are side views of essential parts showing how the handling depth sensor is installed, FIGS. 5 to 7 are side views showing each embodiment, and FIG. 8 is an explanatory view of a reference example. Code, 5... Reaping section, 7... Conveying plate, 11...
Threshing section, 15...handling port, 16...handling depth sensor.

Claims (1)

[Scope of utility model registration request] In a combine that pivots the reaping section to the threshing section so that it can rise and fall freely, the terminal end of the conveyor plate provided on the reaping section side is guided to the vicinity of the suction port of the threshing section, and the processing depth sensor is suspended from the top of the processing port. A handling depth sensor for a combine harvester, wherein a rod is provided close to the upper part of a conveyor plate, and the handling depth sensor performs a detection operation as the rod moves in the front and back direction of the machine body. The rod is configured such that its height and width can be deformed in the vertical direction in response to vertical interference of the conveying plate with the rod as the reaping section moves up and down, and when the interference is canceled. The combine's handling depth sensor is configured in such a way that it is not reversible.