JPH0536344Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is designed to bypass the conveyance path in which grain culms are conveyed along the conveyance guide surface provided in the vertical conveyance device of the pre-harvesting processing section. In a curved state,
A support frame for supporting grain culm holding rails of the vertical conveyance device is provided, and a grain culm contact type sensor for detecting the position of the tip of the conveyed grain culm for handling depth control is installed from the support frame to the conveyance guide. The present invention relates to a grain culm conveying section structure of a combine harvester that is provided in a state that extends toward a surface.

[Conventional technology]

In the combine harvester described above, conventionally, in order to change the setting range of the handling depth by changing the position of the sensor that detects the position of the tip of the grain culm in the direction of the culm of the grain culm being transported, the supporting member of the sensor is It was configured to move by sliding.

[Problem that the invention attempts to solve]

However, in the configuration in which the sensor support member is slid as described above, not only does it become distorted and the sensor position cannot be changed smoothly, but also a rail or the like for sliding must be provided on the curved support frame. As a result, there is a problem that the mounting portion becomes large, and furthermore, setting the desired sensor position has to be done by eye, making it difficult to make fine adjustments with high precision.

The present invention was developed in view of the above-mentioned circumstances, and aims to reduce the size of the sensor mounting part while also making it possible to change the position of the sensor smoothly, with the highest precision possible, and to reduce the depth of handling. The purpose of the present invention is to provide a grain culm conveying part structure for a combine harvester that allows for high adjustment accuracy.

[Means for solving problems]

In order to achieve the above object, the structure of the grain transfer section of the combine harvester according to the present invention has the above-mentioned structure, in which the supporting member of the sensor is oscillated around an axis along or approximately along the direction of grain transfer. The present invention is characterized in that the conveyance guide surface is provided with an index section that is movably adjustable and that indicates the handling depth depending on the positional relationship with the sensor.

The functions and effects of this characteristic configuration are as follows.

[Effect]

That is, the position of the sensor can be easily changed and adjusted by swinging the support member of the sensor.

The adjustment can be performed by visually measuring the position of the tip of the sensor with respect to the indicator on the conveyance guide surface and determining whether the tip of the sensor is at a relative position with the indicator corresponding to the desired sensor position. can. In addition, since the sensor position is set based on the positional relationship of the tip of the sensor with the index section, the sensor position can be changed by swinging, compared to, for example, a system in which the index section is provided near the base end of the sensor and the position is adjusted. This means that it is possible to avoid the expansion of adjustment errors caused by this.

[Effect of idea]

Therefore, since the sensor position is changed by swinging the sensor support member, it is possible to avoid the need to provide a guide rail to guide the sensor position change as in the sliding type sensor position adjustment, and the structure is simplified. It can be made smaller, and the handling depth can be changed and the installation position of the sensor can be adjusted smoothly at the time of factory shipment.

Furthermore, by matching the tip of the sensor with the indicator, the degree of adjustment can be determined with high accuracy, avoiding expansion of adjustment errors, and making it easier to set the sensor position to the standard sensor position at the time of factory shipment. It has now become possible to control the handling depth with good performance and precision.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

As shown in FIG. 7, a reaping pre-processing section including a lifting device 1 and a reaping device 2 that act on the planted grain culms, and a vertical conveyance device 3 that conveys the reaped grain culms to the rear of the machine is connected to a crawler traveling device 4. , threshing section 5 and control section 6
A combine harvester is constructed by equipping the front part of a traveling machine body with such equipment.

As shown in FIG. 4, the vertical conveyance device 3 consists of a clamping conveyance device 7 that acts on the stock side of the harvested grain culm and a locking conveyance device 8 that acts on the ear tip side. The structure is such that the grain culms are taken over in an upright position, lifted up and transported to the rear of the machine, changed to a horizontal position at the end of the transport, and fed to the starting end of the threshing feed chain 9. The rear end side of the vertical conveyor frame 10 is connected to the preprocessing section frame ₁₁ so as to rotate around the axis P1, and the front end side is connected to the preprocessing section frame 11 via the bending/extending link mechanism 12. They are connected to each other, and the clamping and conveying device 7 is configured to swing together with the locking and conveying device 8 in the direction of the grain culm to be conveyed around the axis _P1 on the conveyance end side. In other words, due to the above-mentioned rocking of the clamping and conveying device 7, the position at which the clamping and conveying device 7 clamps the harvested grain culm when it takes over changes toward the culm, and the grain is inserted into the handling chamber (not shown) in the threshing section 5. The length of the culm, or the depth of handling, is made to vary.

Pre-processing section frame 1 of the bending/extending link mechanism 12
An operating lever 13 is attached to the link 12a on the first side. A pinion gear 15 is engaged with a rack gear 14 attached to the operating lever 13.
is attached to the preprocessing section frame 11 via an electric motor 16, a motor support member 17, a lever guide 18 that acts on the operating lever 13, and a lever guide column 19, and the electric motor 1
6 in the forward rotational direction and the reverse rotational direction. That is, the electric motor 16 swings the operating lever 13 around the axis _P2 , thereby swinging the clamping and conveying device 7. And the operation lever 13
The rack gear 14 is configured to engage and disengage from the pinion gear _{15 when the rack gear 14 is swung around an axis P 3 that} is substantially orthogonal to the axis P 2 , and the rack gear 14 is moved to the side where it engages with the pinion gear 15 . The operating lever 13 is swing-biased by a spring 20 to the side where the operating lever 13 is engaged with the spring 15.
4 is maintained in a state where it is detached from the pinion gear 15 and is oscillated around the axis _P2 , so that the link 12a is oscillated and an artificial oscillation operation of the clamping and conveying device 7 can be performed. It is set as. As shown in FIGS. 4 to 6, a support frame 23 is provided which is curved so as to bypass the conveyance path A in which the grain culms in the vertical conveyance device 3 are conveyed along the conveyance guide surface 38. The grain culm clamping rail 7a of the clamping and conveying device 7 is attached to the support frame 23. Further, in order to control the handling depth, a grain culm contact type ear tip side sensor 21a and a stock side sensor 22a, which detect the position of the tip of the grain culm to be conveyed, are arranged in a state extending toward the conveyance guide surface 38 and at the tip side of the grain culm to be conveyed. They are attached to the support frame 23 in a state where they are arranged in parallel in the culm direction of the culm. and,
When both the sensors 21a and 22a come into contact with each other, it is determined that the handling depth exceeds the set range and the handling depth control mechanism 24, which will be described later, is operated to the shallow handling side. , 22a
If none of them come into contact, it is determined that the handling depth will deviate from the set range and become shallow, and the handling depth control mechanism 24, which will be described later, is operated to the deep handling side. That is, the tip of the grain culm is connected to both sensors 21a,
The handling depth is controlled so that it is positioned between 22a and 22a.

As shown in FIGS. 1 to 3, each of the sensors 21a and 22a has a switch-type detection result extraction section 21 for extracting the detection results thereof.
b, 22b, and these extraction parts 21
The depth control mechanism 24 handles the detection results from b and 22b.
By inputting the signal from the handling depth control mechanism 24 to the drive circuit 25 of the electric motor 16, the tip of the grain culm is placed between the sensors 21a and 22a as described above. The electric motor 16 is configured to be automatically operated so that the position is located.

In short, the control lever 13 can be operated by switching the operation lever 13 to a disengaged state with respect to the electric motor 16 as necessary so that the operation can be carried out while maintaining a substantially constant handling depth regardless of changes in the culm height of the reaped grain culm. By doing this, it is possible to artificially adjust the depth of treatment.

The first support member 26 of the tip side sensor 21a and the second support member 27 of the base side sensor 22a are supported by the support frame 2 so as to be oscillated about axes X and Y in a direction substantially along the stalk transport direction.
The first support member 26 and the second support member 27 are attached to a base plate 28 fixed to the support member 23, and are linked together by a wire 29 that serves as a linking device, so that by swinging one of the support members 26, 27, the other also swings in the same direction and by the same stroke.
Bolts 30, 31 which are inserted through the support members 26, 27 are fixed to the support frame 23, and wing nuts 32, 39 for fixing the support members 26, 27 to the support frame 23 are attached to the bolts 30, 31.
The second support member 27 is pivoted by the action of a bolt long hole 27a formed therein, and the first support member 26 is pivoted by the action of a bolt long hole 26a formed therein.
2, 39 are fastened to the sensors 21a,
In other words, the treatment depth to be maintained by the treatment depth control device 24 can be changed and set by adjusting the swinging of both sensors 21a, 22a.

The conveyance guide surface 38 is provided with indicator parts 40 and 41 that indicate the handling depth depending on the positional relationship with the sensors 21a and 22a, and the tip of the tip side sensor 21a is aligned with the indicator part 40. , and when the tip of the stock side sensor 22a is aligned with the index part 41, the handling depth becomes standard, and when changing the handling depth, the tip of the stock side sensor 21a is aligned with the index part 41. The movement strokes of the sensors 21a and 22a can be determined by visually measuring the positions.

As shown in FIGS. 2 and 3, the support members 26 and 27 are pressed against the pivot shafts 33 and 34 of the first support member 26 and the second support member 27 toward the base plate 28. spring 35,3
6 is provided to suppress large positional changes during fine adjustment of the sensors 21a and 22a.

In addition, 37 in the figure is a cover for covering the sensors 21a and 22a, and the sensors 21a and 22a are
It can be removed if necessary to change its position.

[Another example]

In the embodiment described above, only the indicator portions 40 and 41 are provided to indicate the sensor mounting position for displaying the standard handling depth, but in addition to this, scales are provided for each of the shallow handling depth and the deep handling depth. It may be provided,
These are simply referred to as index portions 40 and 41.

Further, in the embodiment described above, each of the first support member 26 and the second support member 27 was attached to swing around the axis in a direction substantially along the grain culm transfer direction. may be attached so as to swing around an axis along the grain culm transfer direction.

[Brief explanation of the drawing]

The drawings show an embodiment of the structure of the grain conveying section of a combine harvester according to the present invention, and FIG. 1 is a rear view of the sensor installation section, FIGS. 2 and 3 are longitudinal cross-sectional views showing the sensor mounting structure, and FIG. 4 is a side view of the handling depth adjustment section, FIG. 5 is a front view of the sensor installation section, FIG. 6 is a plan view of the sensor installation section, and FIG. 7 is a side view of the front section of the combine. 3... Vertical conveyance device, 7a... Clamping rail, 21
a, 22a...sensor, 23...support frame,
26, 27... Support member, 38... Conveyance guide surface,
40, 41... Indicator section, A... Conveyance route.

Claims (1)

[Claims for Utility Model Registration] 1. Curved so as to bypass the conveyance path A for conveying grain culms along the conveyance guide surface 38 provided in the vertical conveyance device 3 of the pre-harvesting processing section. , a support frame 23 for supporting the grain culm holding rail 7a of the vertical conveyance device 3 is provided, and grain culm contact type sensors 21a, 22a are provided to detect the position of the tip of the grain culm to be conveyed in order to control the handling depth. A grain culm conveying part structure of a combine provided extending from the support frame 23 toward the conveyance guide surface 38, wherein the sensors 21a and 22a
The supporting members 26 and 27 are attached so as to be swing-adjustable around the axis along or almost along the grain culm transfer direction, and the sensors 21a and 22a are
Indicator part 4 that indicates the depth of treatment based on the positional relationship with
0,41 on the conveyance guide surface 38. 2. The grain culm conveying unit structure according to claim 1, wherein the indicator parts 40 and 41 are indicator parts that indicate the sensor attachment position for realizing the standard handling depth.