JPS63222615A - Receiving net clogging detector of threshing apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a threshing device receiving net clogging detection device for detecting clogging of a receiving net provided on the lower side of the handling chamber of a sub-handling type threshing device. Regarding.

[Conventional technology]

If the handling chamber of the threshing device becomes clogged, threshed grains may remain in the handling chamber and be damaged by friction with the receiving net, handling drum, etc.

Furthermore, there is a possibility that grains may be discharged from the apparatus together with straw waste etc. discharged from the handling chamber, resulting in threshing loss.

Therefore, the applicant utilized the fact that the electrical resistance value between the meshes of the receiving net changes due to the grains leaking through the mesh of the receiving net, and based on the change in the resistance value, the receiving net We previously proposed a means to detect clogging (patent application 1986).
-185596).

[Problem that the invention seeks to solve]

However, the above-mentioned means previously proposed by the present applicant had the following disadvantages, and there was room for improvement.

In other words, a large number of meshes are formed over the entire lower surface of the handling chamber, and in order to accurately detect the occurrence of clogging, it is necessary to check whether or not the meshes are clogged over a wide area. It became necessary to provide a large number of sensors to detect mesh clogging and means to process the detected information. The disadvantage is that the installation configuration is complicated and expensive.

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to enable accurate detection of clogging of the receiving net while simplifying the device configuration.

[Means for solving problems]

The characteristic configuration of the receiving net clogging detection device for a threshing device according to the present invention includes a pair of leakage amount detection means for detecting the amount of leakage from the receiving net provided on the lower side of the handling chamber of the threshing device. are provided at the feeding start end and the terminal end of the grain culm, respectively, and detect clogging of the receiving net based on the ratio of leakage amounts detected by the pair of leakage amount detection means. The point is that means are provided, and their actions and effects are as follows.

[Function] In other words, in the threshing device, the processed material is sequentially moved from the starting end of grain culm supply to the handling chamber toward the terminal end, and is therefore post-processed, as shown in Fig. 8. As shown in , the leakage amount on the grain culm supply starting end side of the receiving net provided on the lower side of the handling room is larger than on the grain culm supply starting end side, and the grain culm supply starting end side is on the grain culm supply end side. The condition is such that clogging is likely to occur earlier.

However, since the amount of material leaking from the receiving line varies depending on the amount handled, etc., detecting clogging of the receiving line based on the amount leaking only from the starting end of grain culm supply may result in a decrease in the amount processed. There is a possibility that it will not be possible to distinguish between the occurrence of clogging and the occurrence of clogging.

Therefore, a pair of leakage amount detection means for detecting the amount of leakage from the receiving net is provided at the feed start end side and the feed end side of the grain culm, and based on the ratio of the detected leakage amounts, This allows the occurrence of clogging of the receiving net to be detected.

〔Effect of the invention〕

Therefore, since clogging of the receiving net is detected based on the ratio of the leakage amount detected by a pair of leakage amount detection means provided at the feeding start end side and the terminal end side of the grain culm, a small number of pieces can be detected. Even if this method is used, the occurrence of clogging of the receiving line can be accurately detected without being affected by fluctuations in throughput.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a bottom handling type threshing device mounted on a combine harvester will be described below with reference to the drawings.

As shown in Figures 3 to 5, the threshing device consists of a handling cylinder (1)
a handling room (A) that stores grain culms, a feed chain (2) that clamps and conveys grain culms that are lying on their side, a straw removal chain (3) that transports wandering straw out of the equipment after handling, and a cross-flow for dust removal. It is equipped with a fan (4) and a sorting section (B) consisting of a winnow (5) and a swinging sorting plate (6).

The top plate (7) of the handling chamber (A) is provided with a plurality of dust feeding valves (8) for guiding and flowing the material in the handling chamber (A) toward the terminal end. The material to be processed in the handling chamber (A) is guided and flowed by the dust sending valve (8), and
Due to the pushing action of the grain culm moving toward the terminal end in the handling chamber (A), the grain is sequentially moved from the starting end of the handling chamber to the terminal end of the handling chamber, and from the discharge port (9) at the terminal end of the handling chamber. It is designed to be discharged to the sorting section (B). However, the single grains among the processed materials in the handling chamber (A) are passed through the receiver m (10) provided on the lower surface of the handling chamber (A) to the sorting section CB). It is supposed to be released.

Each of the plurality of dust feeding valves (8) is pivotally mounted around the vertical axis (X), and has links that are interlocked and connected so as to integrally sow the dust feeding valves (8). They are interlocked and connected by a mechanism (11). It is configured to be swingable by an electric motor (12) with a speed reduction mechanism.

In addition, in FIG. 3, (13) is the feed chain (2).
) on the side opposite to the side where the handle teeth (IA) of the handling barrel (1) are arranged, the elongated attachment is fixed to the stand (14) in a state where it overlaps with the handling teeth (IA) of the handling barrel (1). Cover it with a straw cutting blade,
A plurality of them are arranged in a line from the starting end to the terminal end of the handling chamber.

First of all, the above-mentioned reception! The configuration of the leakage amount detection means for detecting the amount of leakage material leaking from Jl (1G) to the sorting section (B) will be explained.

As shown in FIGS. 3 and 4, a pair of piezoelectric sensors (S
t) (Sz) is the end side location corresponding to the ear tip side in the culm direction of the post-treated grain culm, that is, the plurality of straw cutting blades (
13), and is provided at each of the grain culm supply starting end side and the grain culm supply end side of the receiving net (10) of the handling room (A).

Each of the pair of piezoelectric sensors (St) and (sz) has the same configuration, and the piezoelectric sensor (S
To explain l), as shown in FIGS. 6 and 7, the lower surface of the receiving net (10) is A plate member (15) for supporting the sensor is attached to the outside of the portion that slopes upward from the top so as to protrude obliquely downward. °Then, the plate member (15
) The piezoelectric sensor (S, ) is attached to the upper side of the piezoelectric sensor (S, ) via a vibration isolating member (16) made of rubber or the like.

In other words, as shown in Fig. 8, in the lower-handling type thresher, the grain culm is handled while being sequentially conveyed from the grain culm supply starting end to the grain culm supply end in the handling chamber (^). Therefore, in the receiving net (10) provided on the lower side of the handling room (^), on the grain culm supply start end side and in the culm direction of the post-processed grain culm, the end side location corresponds to the ear tip side. This is the state in which the amount of grains leaking from the grain is the largest. Therefore, clogging of the receiving net (10) is more likely to occur on the grain culm supply start end side than on the grain culm supply end side, and leakage from the receiver 14 (10) occurs on this grain culm supply start end side. By detecting the amount of grain, information directly related to the occurrence of clogging of the receiving net (10) can be obtained.

However, since the amount of grains leaking from the receiving net (10) varies depending on the amount of grain handled, it is difficult to detect the occurrence of clogging based only on the amount of grains leaking at the starting end of the grain culm supply. , since it becomes impossible to distinguish between the occurrence of clogging and the decrease in leakage, we installed the
A pair of piezoelectric sensors (si) and (sg) are respectively provided to detect the amount of leakage from the receiving net (10).

Next, a description will be given of the clogging detection means (100) that detects the occurrence of clogging of the receiver m (10) based on the detection information from the pair of piezoelectric sensors (si) and (sg).

As shown in FIG. 1, the pair of piezoelectric sensors (St),
(SZ) Based on the detection signal of the piezoelectric sensor (si)
, (si), and detects the amount of leakage (Vl), (vz) by counting the number of grains colliding with each of the pair of piezoelectric sensors (St).

(h) A control device (18) using a microcomputer, which is provided in each of the above, and constitutes a clogging detection means (100) that detects the occurrence of clogging in the receiving net (10) based on the detection information thereof. and an alarm device (19) for notifying the occurrence of clogging.

To explain the configuration of the signal processing circuit (17), it includes an amplifier (20) that amplifies the detection signal of the piezoelectric sensor (st, sz), and a low frequency component of the output signal of the amplifier (20) that selectively passes through. a filter (21) that removes unnecessary signal components caused by machine body vibration and the like and extracts a signal corresponding to an impact component generated when the falling grains collide;
The output signal of the filter (21) is compared with a preset threshold value (Vref), and if a signal level greater than the threshold value (Vref) is input, it is determined as "H'" as a shock due to grain collision. A comparator (22) that outputs a level detection signal, and a one-shot multivibrator (22) that outputs a single pulse signal with a set pulse width when the comparator (22) outputs a 'H' level detection signal.
3) and the piezoelectric sensor (St,
The number of grains colliding with St) is the amount of leakage grains (Vl, VX)
Counters (24) are provided for counting the .

Next, the clogging detection means (100) will be described in detail while explaining the operation of the control device (18) based on the flowchart shown in FIG.

That is, each time the set time elapses, the count value as the detection leakage i(Vυ, (VF)) output from each of the counters (24) of the signal processing circuit (17) is read, and each signal processing circuit The counter (24) of (17) is
Reset for next counting process.

Then, the ratio (vt/vz) of the detected leakage amount (Vl), (ν, -) output from each signal processing circuit (17) is set in advance in accordance with the state of occurrence of clogging. Setting value (
α), and determines whether the detected leakage amount (νl
If the ratio (νi/vz) of li, cVc is greater than the set value (α), it is determined that a clogging has occurred, and the alarm device F (19) is activated.

[Special example]

In the above embodiment, the leakage amount detection means is a pair of piezoelectric sensors (st) and (sz) arranged in the fall path of leaked grains leaking from the receiving net (10) to the sorting section (B). By counting the number of grains colliding with the pair of piezoelectric sensors ($1) and (st) using
(Vx) has been exemplified; however, for example, the piezoelectric sensor (S+).

A plate-like member (15) for supporting without using (S,)
A plate-like member similar to 1. is pivotally attached to the receiving net (10) so as to be swingable in the vertical direction. 4 and 1. configured to be elastically biased upwardly and swung downwardly in response to leakage grains; The amount of oscillation may be detected by a potentiometric method, etc., and the arrangement of the leakage amount detecting means can be changed in various ways.

Also, the amount of leakage (L) detected by the pair of piezoelectric sensors (S+) and (St) is the amount of leakage (L) detected by the pair of piezoelectric sensors (S+) and (St), respectively.
For example, since it corresponds to the processing amount in
Based on the detected leakage amount (Vl), (ν,),
The operation of the electric motor (12) for opening and closing the dust feeding valve (10) may be controlled so that the opening/closing position of the dust feeding valve (10) is a position corresponding to the processing amount, and the detection is performed. The leakage amount (Vl) and (Vo) can be used for various types of control.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings by the reference numerals.

[Brief explanation of drawings]

The drawings show an embodiment of the receptacle clogging detection device for a threshing machine according to the present invention, FIG. 1 is a block diagram showing the control configuration, FIG. 2 is a flowchart showing the operation of the control device, and FIG. 3 is a cutout of the handling chamber. FIG. 4 is a front view of the same, FIG. 5 is a side view of the same, FIG. 6 is a plan view of the piezoelectric sensor, FIG. 7 is a side view of the same, and FIG. 8 is an explanatory diagram of the amount of leakage. (10)... Receive rope, (A)... Handling room, (51), (Sri... pair of leakage amount detection means, (Vl), ( vz)...Detected leakage amount,
(C, /Vo)...Ratio of detection leakage amount, (100)
...Clogging detection means.

Claims (1)

[Claims] A pair of leakage amount detection means (S_1) and (S_2) each detecting the amount of leakage from the receiving net (10) provided on the lower side of the handling chamber (A) of the underhandling type threshing device. , are provided at the feeding start end side and the terminal end side of the grain culm, and detect leakage amount (V_1) of the pair of leakage amount detection means (S_1) and (S_2).
), (V_2) based on the ratio (V_1/V_2) of the receiving net (10).