JPH07274709A - Agitation device of storage tank for grain - Google Patents

Abstract

PURPOSE:To provide a agitation device of a storage tank for grains, enabling to quickly discover the breakage of an agitation tool, etc., and the failure of the device main body and to prevent the generation of an affair wherein the grains are left for a long time without being sufficiently agitated. CONSTITUTION:In an agitation device for agitating grains in a storage tank by inserting an auger 23 into the storage tank, and subsequently rotating and simultaneously moving the auger 23, a rotation number sensor 80 for detecting the rotation state of the auger 23 on the agitation is disposed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stirrer having a stirrer called an auger which can stir grains contained in a grain storage tank vertically evenly.

[0002]

2. Description of the Related Art Grains, particularly rice and wheat, are required to be stored and stored after being dried to a predetermined water content after harvesting in order to maintain quality such as taste and suppress deterioration, and therefore many treatments are required. Facilities have been proposed and used, and various grain storage tanks have been used. Among them, the relatively small-capacity square grain storage tank has been used only as a preliminary drying or primary storage tank in the past.
Recently, in order to be able to perform main drying and the like in such a rectangular grain storage tank having a relatively small volume, it is necessary to install a stirring device capable of uniformly stirring the stored grain in the storage tank. Has been strongly requested.

In order to meet such demands, the applicant of the present application has previously described the square grain storage tank for grains as described in, for example, Japanese Patent Application No. 5-168207 and No. 5-259628. A suitable stirring device was proposed. This agitation device is one in which an agitator called an auger (auger screw) capable of agitating stored grains in the vertical direction is reciprocated simultaneously or selectively in two directions orthogonal to each other in a rectangular grain storage tank. Then, the configuration is basically as illustrated in FIGS. 6 to 8, which will be briefly described below. If a detailed configuration is required, please refer to Japanese Patent Application No.
See No. 168207, and also No. 5-259628.

That is, in the stirring device 100 of the illustrated example, the rails 14 and 15 installed on the side wall portions 4 and 5 so as to bridge between the left and right side wall portions 4 and 5 of the rectangular storage tank 1.
A first trolley 10 which is movably mounted above and a pair of rails 18 and 19 provided on the main body 10A of the first trolley 10 which are laterally movable and mounted on the first trolley. Two
Trolley 20, two augers 23, 24 which are inserted into the storage tank 1 and are rotated in a state of being axially supported near both ends of the second trolley 20, and the augers 23, 2
4 is a belt / pulley type power transmission mechanism 28, 2 respectively
Motors 21 and 22 for rotationally driving via 9,
A first traveling drive mechanism 30 that reciprocates the first carriage 10 in a direction traversing between the front and rear side walls 2 and 3 of the storage tank 1, and the second carriage 20 includes the left and right side walls 4. A second traveling drive mechanism 40 that reciprocates in a direction traversing between the five.

And, in the above-mentioned first trolley 10,
It will be described later so as to pass through a pair of left and right L-shaped wheel support portions 10f and 10f provided with a pair of wheels 10a and 10a at both left and right ends and a gate-shaped support portion 10d provided at both ends of the main body portion 10A. The rotating shafts 53a and 54a of the sprocket wheels 53 and 54 are inserted through bearings, and the entire main body 10A of the first bogie 10 is shown by a chain line in FIG. 7 (a view on arrow A in FIG. 6). As described above, the rotary shafts 53a and 54a are pivotally movable along the traveling direction.

Further, the first traveling drive mechanism 30 is an endless annular traveling chain 33, 34 wound in the front-rear direction along the left and right side wall portions 4, 5 of the storage tank 1.
And a motor 3 for driving the first winding transmission devices 30A and 30B.
6, and the turn arms 45, 4 as a connecting tool for connecting the traveling chains 34, 35 and the first carriage 10.
It consists of 6 and 6.

Further, the second traveling drive mechanism 40 is
As can be seen with reference to FIG. 8, a sprocket wheel 53 for taking out power, which is engaged with the traveling chains 33 and 34 and is rotated according to a relative speed difference between the traveling chains 33 and 34.
And a gear box 57 having an input shaft 55 to which the rotation of the sprocket wheel 53 is transmitted and an output shaft 56 arranged orthogonal to the input shaft 55, and a side of the gear box 57 of the storage tank 1 on the side of the gear box 57. An endless annular lateral movement chain 5 wound in the left-right direction and driven by the output shaft 56 via the sprocket wheel 51.
And a turn arm 65 as a connecting tool for connecting the lateral movement chain 58 and the second carriage 20.

In the stirrer 100 having such a structure, the traveling motor 36 and the stirring motor 21,
When 22 is activated, the first winding transmission devices 30A, 30B
Is activated, the first carriage 10 moves the first turn arm 45,
It is pulled by the traveling chains 33, 34 via 46, and the front and rear side wall portions 2, 3 at the same speed as the chains 33, 34.
While traveling (moving forward) across the space, the augers 23, 24 rotate and move together with the first carriage 10 and the second carriage 20 while stirring the stored grain.

At this time, the first turn arm 45,
Since the connecting portion between 46 and the traveling chains 33, 34 is located in the upper half (outward path portion) of the chains 33, 34, the sprocket wheel 53 for power take-off is
Since the forward path portion and the lower half (return path portion) of 3, 34 are moving in the opposite directions, the rotational speed obtained by adding the moving speed of the chains 33, 34 to the forward speed of the first carriage 10, that is, the chain 33 , 34 are rotated at a speed twice as fast as the moving speed of the gears 34, 34 and the torque of
8A, the second carriage 20 is pushed by the upper half (outward path portion) of the lateral movement chain 58 via the second turn arm 65, as shown in FIG. It travels (moves laterally) in the direction crossing between the left and right side wall portions 4 and 5 at the same speed as the chain 58. In this case, the lateral traveling speed of the second bogie 20 is considerably slower than the traveling speed of the first bogie 10 because the rotation of the sprocket wheel 53 for power extraction is greatly reduced by the gear box 57.

In this way, when the first carriage 10 is pulled by the forward path of the traveling chains 33, 34, the loci of the augers 23, 24 arranged on the second carriage 20 are seen from above. , For example, the left and right side wall portions 4 and 5 from the initial position (positions indicated by reference characters S and S ′ in FIG. 9).
On the other hand, it has an inclination angle corresponding to the speed ratio between the first carriage 10 and the second carriage 20.

When the first carriage 10 is traveling as described above (both the forward trip and the return trip described later), the augers 23, 24 resist the stored grain in the direction opposite to the traveling direction. Acts on the first carriage 10 in response to this resistance.
As shown by the chain line in FIG. 7, the main body 10A of the sprocket wheel 53 for power takeout and the rotation shaft 53 of the sprocket wheel 54 used as an idler are accompanied by the second carriage 20 and the augers 23, 24.
a, 54a when viewed in the traveling direction with the axis as the pivot,
The lower end of 24 swings so as to be delayed and inclines with respect to the vertical plane, and the first bogie 10 and the second bogie 20 mounted thereto travel while the main body 10A is inclining.

The traveling chains 33, 34 and the first
First turn arms 45, 46 for connecting with the carriage 10 of
When the connecting portion of the chains 33 and 34 comes close to the side ends of the sprocket wheels 31A and 31B, the pulling force of the chains 33 and 34 does not act on the first carriage 10, so the first carriage 10 stops. In this case, since the chains 33 and 34 are moving even if the first carriage 10 is stopped, the first turn arms 45 and 46 are pulled by the chains 33 and 34 and turn, and then the first turn arms 45 and 46 turn again. The first truck 10 is pulled by the lower halves (return path portions) of the chains 33, 34 via the first turn arms 45, 46, the traveling direction thereof is reversed, and the truck 10 travels in the front side wall portion 2 direction. At this time, since the moving speed of the chains 33, 34 and the moving speed of the first bogie 10 are the same, the relative speed difference between the sprocket wheel 53 for power extraction and the chains 33, 34 becomes 0, and the power extraction Since the sprocket wheel 53 of does not rotate, the second carriage 20 does not move laterally,
It will remain stopped. As a result, the loci of the augers 23 and 24 arranged on the second carriage 20 draw straight lines parallel to the left and right side wall portions 4 and 5 when viewed from above (see FIG. 9).

When the first carriage 10 comes close to the sprocket wheels 32A and 32B on the opposite side to the above, the first carriage 10 stops as in the case described above.
The first turn arms 45, 46 turn (in the opposite direction to the above), and then the first carriage 10 again moves the chain 33,
34 is pulled via the first turn arms 45 and 46, and thereafter, the augers 23 and 24 move in a zigzag trajectory in the left-right direction. In this case, when the connecting portion between the second turn arm 65 and the lateral movement chain 58 reaches the side end of the sprocket wheel 52 arranged in the central portion of the first bogie 10, the connecting portion causes the lateral movement chain. Since the second carriage 20 is located in the lower half (return path portion) of 58, the second carriage 20 changes from being pushed through the second turn arm 65 to being pulled, and the moving direction of the second carriage 20 is changed. Is reversed. At the time of this reversal, the augers 23 and 24 are located at a position close to the center of the storage tank 1 and the center of the right side wall portion 5 as shown by reference numerals e and e'in FIG. 9, for example. As indicated by the chain line, the locus moves while drawing a symmetrical locus with respect to the locus (solid line) up to that point.

In the agitator 100 described above, the augers 23 and 24 are brought closer to the left and right side wall portions 4 and 5 by distances La and Lb (about 20 cm), and the front and rear side wall portions 2 and 3 are provided. To the distance Lc, Ld (about 20 cm) and stopped there as described above, and in the direction in which the first carriage 10 crosses between the front side wall portion 2 and the rear side wall portion 3. While driving, the distance Le,
It can be moved left and right by Lf (about 30 cm). Note that such a locus is an example, and the augers 23, 2
The movement pattern of 4 can be appropriately changed according to the dry state of the stored grain and the like.

In addition, in the first traveling drive mechanism (30), the first transmission member (33, 33
34) and the first bogie 10 may be replaced with a chain or a wire having flexibility or flexibility in place of the above-mentioned turn arm (45, 46) (Japanese Patent Application by the applicant of the present application). (See No. 5-168207).

[0016]

By the way, in the above-mentioned stirring device, since the stirring tool is moved while rotating, the resistance of the stored grain is added to the stirring tool along the moving direction in addition to the rotating direction. In this case, the resistance acting on the stirrer increases in accordance with the property of the stored grain, the height of accumulation, and the like, as well as the moving speed of the stirrer.

The stirrer is cantilevered near its upper end by a carriage (the main body of the apparatus including the rotational power source of the stirrer), and its height from its lower end to a height position corresponding to the height of grain accumulation. Since it is inserted into the grain, its lower end side is bent or inclined so as to be delayed along the moving direction of the carriage. Therefore, the eccentric load is continuously and repeatedly applied to the stirrer and its bearing portion or connecting portion, and the stirrer and its bearing portion or connecting portion (hereinafter referred to as stirrer, etc.) are damaged by metal fatigue or the like. They are easy to do and when they break, the grains are naturally not agitated.

Also, when a failure (such as cutting of a belt) occurs in the main body of the apparatus including the rotational power source of the agitator and its power transmission path, the agitator does not rotate and grains are not agitated. However, the operation of the agitator described above is automated, and therefore the agitation work is not always monitored (the agitator in the tank cannot be seen even if it is observed), and the agitator is damaged. Even if a situation occurs in which the apparatus main body malfunctions and the stirring work is not properly performed, it is difficult to immediately discover such a situation.

Therefore, the traveling movement of the trolley is continued even if the agitating work is not properly performed due to damage to the agitating tool or the like, and the main body of the apparatus is broken. As a result, the grain is sufficiently agitated. There is a problem that the quality of the product is significantly reduced because it is left for a long time without being processed. It should be noted that damage can be minimized by quickly finding out that the agitator etc. has been damaged or that the device body has failed, and performing repair work such as replacing the agitator etc. The repair time and cost vary greatly depending on the damaged or broken part. For example, even if the stirring operation of the grain is stopped as a result, the bearing part or the connecting part of the stirring part is different from that when the stirring tool is broken. If the main body of the device is damaged or fails, the repair work is more time-consuming and the damage tends to be greater.

In view of the above point, the present invention makes it possible to quickly find out that a stirring tool or the like has been damaged or that the main body of the apparatus has failed, so that the grain is left for a long time without being sufficiently stirred. It is an object of the present invention to provide a stirring device for a grain storage tank, which is prevented from being brought into contact with. Another object of the present invention is to provide an agitator capable of performing repair work quickly and easily.

[0021]

In order to achieve the above-mentioned object, the stirring device for a grain storage tank according to the present invention basically has a stirring tool inserted in the storage tank and is rotated. The grain in the storage tank is agitated by moving the grain, and a detection means for detecting the rotation state or the presence or absence of the agitator at the time of agitation is additionally provided. In this case, as the detection means, a rotation speed sensor that detects the rotation state of the stirring tool, a proximity sensor that detects whether the stirring tool is present, or the like can be used.

Further, in the agitator according to the present invention, the connecting portion between the upper part of the agitator and the main body of the apparatus is made weaker than other parts, and the aforesaid interlock is provided when a load larger than a predetermined amount is applied to the agitator. The part may be configured to be destroyed. In this case, one aspect is that the upper part of the stirring tool is connected to the apparatus main body through a shear pin (connecting tool) and the shear pin is cut when the stirring tool is excessively inclined during stirring. As.

[0023]

[Operation] In the stirrer for a grain storage tank according to the present invention having the above-described configuration, since the detection means for detecting the rotating state or the presence or absence of the stirrer is attached, It is damaged or the device main unit malfunctions, that is, the stirring tool does not rotate even during stirring, or the stirring tool is broken and dropped from the device main unit, etc.
When an abnormal situation occurs in which the stirring work is not properly performed, the abnormal situation is immediately detected by the detecting means, and, for example, the rotation power source and the moving power source of the stirring tool are stopped, and an alarm is issued.

Therefore, when the agitator or the like is damaged or the main body of the apparatus breaks down, it is possible to quickly restore the necessary parts, and avoid the situation where the grains are left for a long time without being sufficiently agitated. . In this case, by using a rotation speed sensor that detects the rotation state of the stirring tool as the detection means, not only when the stirring tool is broken, but also the power transmission mechanism such as the motor or the belt that rotationally drives the stirring tool fails. Thus, it is possible to reliably detect the state in which the stirring tool is not rotating properly.

Further, the connecting portion between the upper portion of the stirring tool and the main body of the apparatus is made weaker than the other portions so that the connecting portion is broken when a load more than a predetermined amount is applied to the stirring tool. Good. By doing so, when a load greater than a predetermined amount is applied to the stirring tool, the brittle connecting portion is destroyed before the other parts, the rotation of the stirring tool is stopped, or the stirring tool is removed from the main body of the apparatus. take off. Therefore, before the trouble occurs in other parts, the detecting means detects an abnormal situation in which the stirring work is not properly performed, and the repair work is performed in the same manner as described above.

In this case, if the agitator, its bearing, etc. are damaged or malfunction, the repair work is tedious and the damage tends to be large, but as described above, the connecting part breaks before other parts. By doing so, damage can be minimized and repair work can be performed quickly and easily.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following is a description of an example in which the present invention is applied to the stirring device 100 shown in FIGS. 6 to 9 described above. FIG. 1 shows a state in which the first trolley 10 of the agitating device 100 and the second trolley 20 mounted on the first trolley 10 are cut along a vertical plane, and each part in the figure is common to those in FIGS. 6 to 8 described above. Is attached. In the figure, on the pair of rails 18 and 19 provided on the main body portion 10A of the first carriage 10, as described above, the second carriage 20 is mounted in a laterally movable state. The augers 23, 24 (only 23 is shown here) are pivotally supported by the bearing portion 17a near both ends of the second carriage 20, respectively.
Has been inserted inside. The augers 23 and 24 are belt-pulley type power transmission mechanisms 28 and 29 (only 28 is shown here) by motors 21 and 22 (not shown).
It is driven to rotate via.

Further, as described above, the first carriage 10 has the gate-shaped support portions 1 provided at both ends of the main body portion 10A.
Sprocket wheels 53, 54 so as to penetrate 0d
The rotating shafts 53a and 54a (only 53a is shown here) of the first bogie 10 are inserted through bearings, and the entire main body portion 10A of the first bogie 10 together with the second bogie 20 and the augers 23 and 24 is shown in FIG. As above the rotary shaft 53
The a and 54a are pivotally movable along the traveling direction.

When the inclination angle θ of the augers 23, 24 (the main body portion 10A of the second carriage 20 and the first carriage 10) with respect to the vertical plane g becomes 15 ° or more, as shown in FIG. One of the mercury switches 61, 62 constituting the tilt detection mechanism 60 attached to the second carriage 20 is moved so that one of the mercury switches 64 is turned off. For details of the tilt detecting mechanism 60, refer to Japanese Patent Application No. 5-168207 and No. 5-259628 by the applicant of the present application, if necessary.

In addition to the above construction, in this embodiment, the state of the augers 23 and 24 at the time of stirring, that is,
A rotation speed sensor 80 for detecting whether or not it is broken (presence or absence) and whether or not it is rotating properly (rotation state).
Is attached. The rotation speed sensor 80 includes a bracket 8 protruding downward from the bottom portion 17 of the second carriage 20.
The magnetic detection unit 82 attached to No. 1 and the rotary plate 83 fixed to a position below the bearing unit 17 above the auger 23 (the same as the auger 24) are provided. As can be seen from FIG. 3, the rotary plate 83 is provided with magnet portions 83a and 83b on opposed convex portions 180 degrees apart from each other, and the magnet portions 83a and 8b are rotated by the rotation of the augers 23 and 24.
When 3b approaches the magnetic detection unit 82, the magnetic detection unit 82 detects it and supplies a pulse signal to the control unit (operation panel) 50 twice per rotation.

In the control unit 50, in addition to the signals from the rotation speed sensors 80, 80 respectively attached to the two augers 23, 24, the mercury switch 61,
The detection signal from 62 is also supplied, and the control unit 50
Based on these signals, the motor 36 for traveling the carriage,
Motors 21 and 2 for rotating the augers 23 and 24
2 and output control of the warning light 92 and the alarm buzzer 94 installed in the control room or the like.

Under such a configuration, the augers 23, 2
In No. 4, the second carriage 20 is cantilevered near the upper end thereof and is inserted into the grain from the lower end to a height position corresponding to the height of accumulation of the grain, so that the lower end side of the carriage moves. It will be bent or inclined so as to be delayed along the direction. Therefore, the eccentric load is continuously and repeatedly applied to the apparatus main body 17 such as the auger 23 (24) and the bearing 17a thereof.
The vicinity of the lower end of the bearing portion 17a in the upper part of (24) is easily damaged by metal fatigue or the like, and when the auger 23 (24) or the like is damaged, the grain cannot be agitated as a matter of course.

Further, a failure (burning of the motor, cutting of the belt, etc.) occurred in the apparatus main body 17 such as the motors 21 and 22 for driving the rotation of the augers 23 and 24 and the belt and pulley type power transmission mechanisms 28 and 29. Also in this case, the augers 23 and 24 do not rotate and the grains are not stirred. As described above, if the augers 23, 24, etc. are damaged or the belt-pulley type power transmission mechanisms 28, 29, etc. fail, will the augers 23, 24 fall off from the second carriage 20 (apparatus body 17)? The rotation speed sensor 80 does not fall off, but its rotation stops, and the rotation plate 83 fixed to the upper portions of the augers 23 and 24 also stops rotating.
Therefore, the pulse signal (detection signal) is not properly supplied to the control unit 50.

As described above, when the pulse signal (detection signal) is not properly supplied to the control unit 50 from the rotation speed sensor 80 for a predetermined time or longer, the control unit 50 causes the augers 23 and 24 and the bearing portions 17a and 17a to operate. At least one of them is damaged, or the device main body 17 such as the motors 21 and 22 and the belt-pulley type power transmission mechanisms 28 and 29 fails, that is, an abnormal situation occurs in which stirring work is not properly performed. Judgment, a motor 36 for traveling the bogie, a motor 2 for rotating the augers 23, 24
The electric power supply to 1 and 22 is stopped, the traveling movement of the 1st trolley | bogie 10 and the 2nd trolley | bogie 20 is stopped, the rotation drive of the augers 23 and 24 is also stopped, and also it installs in a control room etc. The warning lamp 92 is turned on and the alarm buzzer 94 is activated.

By doing this, the auger 2
When the 3, 24, bearing 17a, etc. are damaged or the device main body 17 such as the belt / pulley type power transmission mechanism 28, 29, etc. fails, it is possible to quickly restore the necessary parts, and the grain The situation of being left for a long time without being stirred is avoided. In this case, the rotation speed sensor 80 for detecting the rotation state of the augers 23, 24 is used as the detection means for detecting the abnormality of the augers 23, 24 or the apparatus main body 17 instead of the proximity sensor.
Not only when the auger 23 is broken, but also when the augers 23 and 24 are not rotating properly due to the failure of the motors 21 and 22 that rotationally drive the augers 23 and 24 and the belt-pulley type power transmission mechanisms 28 and 29. Can be reliably detected.

In the above example, the magnetic sensor type was used as the rotational speed sensor. However, various rotational speed sensors are known, and any of them may be appropriately selected and used. Good. FIG. 4 shows the case where an optical rotation speed sensor 90 is used. This rotation speed sensor 90 is provided with a light receiver 96 and a light emitter 97 attached to a bracket 81, and one location on the auger 23 (24). Narrow width mirror body (light reflecting member) 9 fixed only
When the auger 23 (24) rotates and the mirror body 95 comes to the front facing position of the light emitter 97 and the light receiver 96, the light from the light emitter 97 is reflected by the mirror body 95. And enters the light receiver 96. Therefore, in the rotation speed sensor 90, a pulse signal (detection) is sent from the light receiver 96 to the control unit 50 each time the light from the specular body 95 is incident on the light receiver 96, that is, each time the auger 23 (24) makes one revolution. Signal).

FIG. 5 shows another embodiment of the stirrer according to the present invention, which is a tubular connection between the auger 23 (24) and the belt-pulley type power transmission mechanism 28 (29). The tool 85 is inserted, and the auger 2 is attached to the tubular connector 85.
3 (24) is inserted and connected by shear pins 86. Here, the shear pin 86 is made weaker in strength than other parts, is horizontally inserted so as to radially penetrate the tubular connecting portion 85 and the auger 23 (24), and is fastened with the nut 87. The auger 23 (2
4) is excessively inclined and cuts and breaks when an eccentric load of a predetermined amount or more is applied to its upper portion. Also,
Also in this case, the rotation speed sensor 80 is additionally provided in order to detect the rotation state of the auger 23 (24) as in the case described above.

Under such a structure, the auger 23 (2
When a load larger than a predetermined value is applied to 4), the fragile shear pin 86 breaks before other parts, and the auger 2
3 (24) falls off from the tubular connector 85 (dashed line in FIG. 5). Therefore, also in this case, the pulse signal (detection signal) is not properly supplied from the rotation speed sensor 80 to the control unit 50 for a predetermined time abnormally, and the control unit 50
Determines that an abnormal situation in which the stirring work is not performed properly occurs, and stops the power supply to the trolley-driving motor 36 and the augers 23, 24 rotationally driving motors 21, 22 in the same manner as described above. Then, the first trolley 10 and the second trolley 2
0 traveling movement is stopped and the augers 23, 2
The rotation driving of No. 4 is also stopped, the warning lamp 92 installed in the control room or the like is turned on, and the alarm buzzer 94 is controlled to sound.

By doing so, an abnormal situation in which the stirring work is not properly performed is found before the trouble occurs in other parts, and the repair work is performed in the same manner as described above. In this case, if the augers 23, 24 and their bearings 17a etc. are damaged or malfunction, the repair work is tedious and the damage tends to be large, but as described above, the shear pin 86 is cut prior to other parts. By doing so, damage can be minimized, and repair work can be performed quickly and easily.

The connecting tool for connecting the auger 23 (24) to the apparatus main body 17 is not limited to the shear pin 86, and for example, a joint or the like which is detached when a load of a predetermined amount or more acts thereon can be used.

[0041]

As can be understood from the above description, the stirring device for the grain storage tank according to the present invention is provided with the detection means for detecting the rotating state of the stirring tool or the presence or absence of the stirring tool. Despite that, the stirring tool is not rotating, or the stirring tool is broken and dropped from the main unit of the device.
When an abnormal situation occurs in which the stirring work is not performed properly, it is immediately detected by the detection means, and for example, the rotation power source or the movement power source of the stirring tool is stopped, and an alarm etc. is issued. In the event of damage to the utensils, etc. or failure of the main unit of the device, it is possible to quickly restore the necessary parts, and it is possible to obtain the excellent effect of avoiding the situation where grains are left for a long time without being sufficiently stirred. .

Further, by making the connecting portion between the upper part of the stirring tool and the main body of the apparatus weaker than other parts, the connecting portion is broken when a load more than a predetermined amount is applied to the stirring tool. When a load greater than a predetermined value is applied to the agitator, the fragile connecting part is destroyed before the other parts, and the agitator stops rotating or the agitator falls off from the main unit of the device. Before the trouble occurred in the, the detection means discovered an abnormal situation where the stirring work was not performed properly,
The repair work will be carried out in the same manner as above, and if the agitator and its bearings are damaged or malfunction, the repair work will take time and damage will increase. By breaking the other parts in advance, damage can be minimized, and repair work can be performed quickly and easily.

[Brief description of drawings]

FIG. 1 is a diagram showing a main part of an embodiment of an agitating device for a grain storage tank according to the present invention.

FIG. 2 is a diagram provided for explaining a configuration and an operation of the embodiment of FIG.

FIG. 3 is a diagram showing a control system of the embodiment of FIG.

FIG. 4 is a diagram showing another example of the rotation speed sensor of the embodiment of FIG.

FIG. 5 is a diagram showing a stirring device according to another embodiment.

FIG. 6 is a perspective view showing a conventional example of a stirring device.

FIG. 7 is a view on arrow A in FIG.

FIG. 8 is a partial front view of the example shown in FIG.

9 is a diagram showing an example of a movement pattern of the auger of the example shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... 1st carriage 17 ... Device main body 17a ... Bearing part 20 ... 2nd carriage 23, 24 ... Auger 80, 90 ... Rotation speed sensor 85 ... Cylindrical connector 86 ... Shear pin

Claims (5)

[Claims] 1. A stirrer configured to stir the grain in the storage tank by inserting the stirrer into the storage tank and moving the stirrer while rotating the stirring tool. A stirrer for a grain storage tank, characterized in that it is provided with a detection means for detecting the presence or absence of the grain. 2. The stirring device for a grain storage tank according to claim 1, wherein the detecting means is a rotation speed sensor for detecting a rotation state of the stirring tool. 3. A stirrer for a grain storage tank according to claim 1, wherein the stirrer is tiltable with respect to the vertical line. 4. The connecting portion between the upper part of the agitator and the main body of the apparatus is weaker than other parts, and the connecting portion is destroyed when a load more than a predetermined amount is applied to the agitator. The stirring device for a grain storage tank according to claim 1, wherein the stirring device is for a grain storage tank. 5. The upper part of the stirring tool is connected to the main body of the apparatus via a shear pin, and the shear pin is cut when the stirring tool is excessively inclined during stirring. The stirring device for a grain storage tank according to claim 4.