JPS5834091B2 - Harvester crop sensor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a crop sensor for an automatic control device for driving operation of a working section in a harvesting machine equipped with a reaping section such as a binder, a harvester, or a combine harvester, and particularly relates to a crop sensor for specifying the mounting position of the crop sensor. automatic control of working part operations,
The present invention relates to a configuration that is advantageous for the detection operation of a crop sensor.

The driving operation of the working part of the harvesting machine is performed from the prime mover mounted on the harvesting machine via a power transmission mechanism such as an endless belt, and the endless belt power transmission mechanism is provided with a tension pulley clutch, and this clutch can be manually disconnected. This connects and disconnects the prime mover power to a working part such as a cutting blade, and an automatic control device for the operation of the working part is controlled by a crop sensor that uses this tension pulley clutch at a position in front of the cutting blade in the working part. It is being developed.

The crop sensor comes into contact with the stalk of a crop such as rice planted in a field, detects the crop, and drives a reaping unit or the like.

Once the crop rows have been harvested, the crop sensor no longer detects the crop stem culm, so it is economical to stop unnecessary drive operations of working parts during rotation, thereby preventing unnecessary power consumption.

Alternatively, a method of using the crop sensor to automatically correct the operating direction of the harvesting machine based on crop detection may be considered.

This kind of crop sensor takes into account the response time of power transmission control to the working part and the time required from detection by the work sensor to tension pulley clutch operation, and when the crop stem culm reaches the cutting blade, the cutting blade is not driven. In order to be ready for harvesting, it is best to position the cutting blade in such a way that it can detect crops as quickly as possible in the area ahead of the cutting blade.

However, due to the structure of the harvester, there are restrictions on arbitrarily selecting the installation location of the crop sensor.

For example, if the crop is placed ahead of the divider in the cutting section, it is not only inconvenient from a safety point of view, but also
The detection operation cannot be performed because it interferes with the well-known stem culm lifting claw provided on the divider.

Furthermore, since the divider has a tapered shape, it is disadvantageous to install the crop sensor in this narrow machine frame.

Although it depends on the structure of the crop sensor, in particular, even if the power of the reaping unit is disconnected before the end of the crop in the field reaches the cutting blade after passing through the crop sensor, the last crop may not be able to be harvested. , This results in uncut residue during the reaping operation.

The purpose of this invention is to solve the problems of the crop sensor of the harvester based on the above-mentioned prior art, and to solve the problem of the crop sensor of the harvester based on the above-mentioned conventional technology. The present invention aims to provide an excellent crop sensor that is useful in the field of harvesting machine applications.

In order to solve the above-mentioned problems, the structure of the present invention, which is based on the above-mentioned claims in accordance with the above-mentioned object, is to solve the above-mentioned problems. The base pivot point of the two cantilever crop sensors is set at a location behind the tip of the reaping section, and the two cantilever beams have a distal end that faces obliquely forward to the stem culm introduction path through a curved section. A technical measure has been taken in which the tip of the sensor is located in the range from the tip of the reaping section to the cutting blade when the sensor is at a steady stop position where it does not detect the crop stem culm.

Next, one embodiment of the present invention will be described below based on the drawings.

Figure 1 shows a binder as an example of a harvester.
A reaping section 1, a horizontal conveying section 2, a binding machine 3, and a prime mover 4 are mounted on drive wheels 5 from the front.

6 is a steering handle.

The power of the prime mover 5 drives the drive wheels 5, the reaping section 1,
The drive section 7 of the conveyance section 2 is driven via a power transmission mechanism, for example, an endless belt 8 installed between a prime mover pulley and a main shaft pulley of the drive section 7 .

The drive unit 7 includes a cutting blade 9 in the reaping unit 1 and a stem culm lifting device 1.
0, conveyance chain 11 in the horizontal conveyance section 2. Furthermore, they are interlocked and connected to each other so as to drive the binding machine 3 and the like.

12 is a crop sensor which constitutes the gist of this invention;
5 is linked to a tension pulley clutch 14 provided in the belt type power transmission structure 8 via a link mechanism 13, while a free tip 12a as a tip portion is connected to a tension pulley clutch 14 provided in the belt type power transmission structure 8
faces the stem culm introduction passage B between the dividers 16 of the reaping section 1 via an integral curved section 12c extending diagonally forward from the base section 12b.

The control of the clutch 14 by the crop sensor 12 will be explained with reference to FIG.

FIG. 2 shows the power transmission system shown in FIG. 1, and A in the figure indicates a crop stem culm to be planted in a field.

The crop sensor 12 has a cantilever shape that is pivotally supported by a pivot point 15, and is installed along the space between the dividers 16 in FIG. L・ru.

Now, when the harvester moves forward, the planted stem culm A is introduced between the dividers 16 along the introduction route B.

After that, in the introduction path B, the stem culm A is moved from the cutting blade 9 in the lateral conveyance direction.
The cutting blade 9 guides the cutting blade 9 by a guiding spring plate 17 arranged at an angle so as to guide the cutting blade 9 , and the cutting blade 9 feeds the cutting blade 9 to the binding machine 3 by the conveying chain 11 .

During this process of introducing the stem culm, the stem culm A becomes the crop sensor 1.
2 and push it backwards and rotate it.

This rotation of the crop sensor 120 is transmitted to the tension pulley of the clutch 14 via the link mechanism 13, and the clutch 14 is engaged.

Therefore, the power of the prime mover 4 is connected to the drive unit 7 and the cutting blade 9
etc., and the above-mentioned operation progresses.

That is, the relationship between the rotation angle of the crop sensor 120 and the operation of the clutch 14 is set as shown in FIG. 3 as an example.

When the free end 12a of the crop sensor 12 is rotated from the solid line position from ■ to ■, the clutch 14 is engaged.

The OFF range indicates the clutch disengagement range, and the ON range indicates the clutch engagement range.

Therefore, while the stem culm A is being continuously introduced along the introduction route B, the crop sensor 12 is always in the rotational position of the area 3, and the power is connected and transmitted.

When the crops and the rows of plants have been harvested and the stem culm A is no longer introduced, the crop sensor 12 remains in the position ■, so the clutch 14 is disengaged and the power transmission from the prime mover 4 is automatically stopped. be separated.

In this way, the driving operation of the reaping section is automatically controlled by the operation of the crop sensor 12.

This control system is connected to the binding machine 3 via a spring delay mechanism as appropriate.
can also be controlled in conjunction with each other.

According to the present invention, the installation position of the crop sensor 12 is determined as shown in FIGS. 4 to 6.

The pivot point 15 of the crop sensor 12 is located on one side of the machine frame 18 extending from the rear frame to the divider 16 at the front, between the tip position M of the divider 16 and the tip position N of the cutting blade 9, rearward of M. The shaft support 1 is set at point O of
9.

On the other hand, the free tip 12a of the crop sensor 12 is set at a point ranging from M to N.

In this case, the free tip 12a of the crop sensor 12 at the steady stop position where the crop stem culm is not detected is determined to be the best point from the response time and control characteristics of the power transmission mechanism 8 and the clutch 14, but generally it is best to position it as far forward as possible.

Further, the front half area l of the crop sensor 12 has a shape that is approximately parallel to the line connecting the dividers 16 so as to be able to cope with fluctuations in the introduction position of the stem culm, and the divider 16 and the shape are formed on both sides of the parallel part l. The intervals e1 and e2 are set as small as possible.

Furthermore, the rotation range of the crop sensor 12 is limited by the guide spring plate 17.
It is made so that it can overlap with the cutting blade 9 further back.

As a result, the crop sensor 12 does not return to its original state until the stem culm A is reliably cut by the cutting blade 9.

- Regarding the height hl from the ground of the excellent crop sensor 12,
Since the self-supporting resistance of the planted stem culm A is greater at the base than above, it is advantageous to have a lower height hl as a detection point, but if it is lower than the ground height h2 of the cutting blade 9, the cut stump , the introduced stem culm cannot be detected correctly.

Therefore, the ground height hl is set above the height h2 of the cutting blade 9.

Therefore, the ground height h3 of the pivot point 15 of the crop sensor 12
be placed at a high position to prevent mud from clogging the field during operation.

The positional relationship of this installation height is clearly shown in FIGS. 5 and 6.

In the above configuration, when the stem culm A is introduced along the introduction path B as explained in FIG. 2, the crop sensor 12 detects this and operates the clutch 14 of the power transmission mechanism 8, and Depending on the design, the driving operation of the bundling part is automatically controlled depending on the presence or absence of the crop stem culm.

As described above, in the crop sensor of the harvester according to the present invention, the tip end facing the stem culm introduction path between the divider tip of the reaping section and the rear cutting blade is connected to the side machine frame of the reaping section. Since it is provided through a curved part extending obliquely forward from the pivoted base, the tip part basically does not interfere with the divider, and the effect of obtaining reliable detection operation is achieved. In addition, since the detection area can be set over a wide range, the cutting blades can be accurately linked, which is an excellent effect.

Furthermore, since it has a simple structure, it not only reduces manufacturing costs, but also has the secondary merits of fewer failures and easy maintenance.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is an overall plan view of the binder, FIG. 2 is a power transmission line diagram showing an automatic control system, FIG. 3 is an explanatory diagram showing the operating range of the actuation sensor, and FIG. 4 is an enlarged plan view of the main part, FIG. 5 is a side view of FIG. 4, and FIG. 6 is a front view of FIG. 4. 1... Reaping section, 16... Divider, 9
・・・・・・Cut blade, B・・・・Stem culm introduction route, 12
a...Tip, 12b...Base, 14
...Tension pulley clutch, 12...
・・Crop sensor 15・・・・Axis fulcrum, 12c・
...Curved section.

Claims (1)

[Claims] 1 The tip part faces the stem culm introduction path between the divider tip provided in the reaping part of the harvester and the rear cutting blade, and the base part is pivotally supported by the side machine frame of the reaping part, and the tension pulley clutch is installed. Operation of a harvesting machine, characterized in that the tip portion is provided via a curved portion extending obliquely forward from the pivot point and is rotatable. sensor.