JPH03115B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an automatic sorting plate angle adjustment device in a grain oscillating sorter, and is particularly aimed at optimal sorting of grains after hulling. The present invention relates to a device that can automatically control the slope of a sorting plate in an oscillating grain sorter.

<Prior art> As shown in FIG. 6, an automatic huller has a husking section A, a winnowing section B, a conveying section C, and a rocking section in which the swinging grain sorting machine 1 of the present invention is installed. It consists of a dynamic sorting section D. The paddy is ground in the husking section A to become ground rice, the husks of the ground rice are separated in the wind sorting section B, the rice is lifted up in the conveyance section C, and the ground rice enters the hopper 4 from the ground rice discharge pipe 2.
Next, the grains are supplied onto the plurality of grain sorting plates 5 of the swing sorting section D.

The grain sorting plate 5 has a vertical gradient in FIG. 6, but in order to enable specific gravity sorting,
Perpendicular to the drawing, ie as seen in FIG. 2, a laterally inclined slope is provided, with the swinging side 18 being higher than the swinging side 19. As shown in FIG. 1, the hulled paddy flowing on the grain sorting plate 5 is gradually separated into brown rice, mixed rice, and paddy by shaking, and then separated by the branching plate 6. You will be guided to each gutter.

An attempt is made to sense the condition of the grains sorted by the grain sorting plate 5 and automatically adjust the slope to the optimum one.
Various studies have been made in the past. In the old days, a device (Jikko 45-
(No. 28283), one with a structure that detects the layer thickness by installing a touch plate in the downstream zone of grains (Utility Model Publication No. 1257, 1973), and one with a structure that measures and detects the flow rate of brown rice and paddy after discharge using a balance. (Special Publication No. 50-17377, Special Publication No. 55-38190
(Japanese Patent Publication No. 57-49273), in which a phototube is installed close to the top (upstream) of the sorting plate to detect the presence or absence of a grain layer on the plate. For detectors using photovoltaic elements such as phototubes, there are also
There is one disclosed in No. 60-55196.

<Problems to be Solved by the Invention> However, these conventional detection methods have poor sensitivity and cannot detect the tendency of separation to be biased at an early stage, which poses a practical problem. Therefore, it has been pointed out that there is a need for automatic adjustment of the sorting plate slope through more sensitive and effective measurement.

<Means for Solving the Problems> The present invention solves the above-mentioned problems by using a piezoelectric element, which has not been used in the field of grain shaking sorters, as a grain amount measuring sensor. This solved the problem. Previous uses of piezoelectric elements were common in sound generating devices such as those found in buzzers. There is no example in which this method has been used to count the amount of grains as in the present invention. The use of this piezoelectric element in the field of grain sorting is of great significance. The installation position of the piezoelectric element as the grain amount measurement sensor 28 on the grain sorting plate is the supply part 10,
The swing-up side discharge section 11 and the swing-down side discharge section 13 are suitable. The piezoelectric element serving as the grain amount measurement sensor 28 is installed on the grain sorting plate directly below the opening hole 40 provided in the middle of the plate surface on the swinging side 18 and in the upper and lower regions of the swinging side 19. If the opening hole 41 is provided in the middle of the opening hole 41, a more effective arrangement can be achieved.

<Function> With this structure, each grain falling onto the piezoelectric element generates an electromotive force, so the condition of the grains to be sorted can be accurately sensed.
It can automatically adjust to the optimal slope.

In particular, if piezoelectric elements are provided in the supply section 10, the shaking up side discharge section 11, and the shaking down side discharge section 13 of the grain sorting plate, the sensors of the supply section 10 can detect the The start of sorting is determined, and this makes coarse adjustment possible, and accurate inclination adjustment of the grain sorting plate 5 is possible using direct information from the sensors of the shaking up side discharge section 11 and the shaking down side discharge section 13. It worked. Furthermore, it is possible to comprehensively determine whether or not the sorting is complete based on information from the sensor of the supply section 10, the sensor of the swing-up side discharge section 11, and the sensor of the swing-down side discharge section 13.

The installation position of the piezoelectric element on the grain sorting plate 5 is determined by setting the position directly below the opening hole 40 provided in the middle part of the plate surface of the upper swinging side 18 and the opening hole 41 provided in the middle part of the plate surface of the lower swinging side 19. If it is located directly below, it has the effect of accelerating the detection time, and it is possible to detect and deal with the tendency of the separation to be uneven at an early stage.

Embodiments of the present invention will be described in detail below with reference to the drawings.

Embodiment 1 FIGS. 1 to 3 show a first embodiment of the present invention, in which FIG. 1 is a perspective view of a grain sorting plate, and FIG. 2 is a sectional view taken along line AA in FIG. 1. . FIG. 3 is a configuration diagram of an automatic adjustment circuit.

A plurality of grain sorting boards 5 are stacked on top of each other,
In Figure 1, when paddy is used as the grain,
The upper part is the supply side of paddy, and the lower part is the discharge side of brown rice after sorting. The discharge side is the swinging side discharge part 11 from the right.
(brown rice discharge section), mixed rice discharge section 12, and shaking side discharge section 13 (hull discharge section). Branch plates 6, 6 are provided between them, and both handles 1
Adjustment is possible with 6 and 16.

As shown in FIG. 2, such a grain sorting plate 5 is provided with a horizontal slope that is higher on the upper side 18 than on the lower side 19, and in order to adjust the slope, a slope control device 9 is used.
is provided. Motor-driven gradient adjustment has been proposed in the past. In the present invention, in order to do this smoothly, the arm 2 forming the link is
A crankshaft 22 is provided between 0 and 21, and a rod 24 is provided between the upper link shaft 23 of one arm 20.
screw the gudgeon pin 26 into the adjustment screw 25 provided on the shaft of the motor 3, attach it to one side of the F-shaped arm 27 of the intermediate fulcrum, and connect the other arm 27 to the lower end of the link arm 20. It has an axially supported structure.

In this device, a grain amount measuring sensor 28 is connected to the supply section 10 on the grain sorting plate 5, the shaking upper side discharge section 11, and the shaking lower side discharge section 13, respectively.
a, 28b, and 28c are provided. The sensor in this case is characterized by being a piezoelectric element. In the example shown in the first figure, the sensor 28a of the supply section 10 determines the start of grain sorting and the appropriate inflow amount, and the sensor 28b of the shaking-up side discharge section 11 and the shaking-down side discharge section 13 , 28c, accurate separation and sorting on the grain sorting plate 5 can be detected, allowing accurate gradient adjustment. Furthermore, it is possible to determine whether the sorting is complete or the like based on information from all the sensors 28a, 28b, and 28c.

Grain amount measurement sensor 28a, 2 consisting of a piezoelectric element
Information from 8b, 28c is processed by an autoregulating circuit. A schematic diagram of the circuit is shown in FIG. The automatic adjustment circuit mainly includes a control device 30, a grain amount detection circuit 31, and a motor operation circuit 32, to which a power supply circuit 33 is attached. The control circuit 30 can be freely programmed, and determines whether or not control is necessary, the control direction, etc. from the count number of a predetermined number or more inputted from the grain amount measurement sensors 28a, 28b, and 28c to the grain amount detection circuit 31. It is possible to instruct the motor operating circuit 32 to operate in forward or reverse direction or to stop. In particular, a plurality of grain quantity measuring sensors 28 are provided.
By comparing the counts of the information from a, 28b, and 28c, it is determined whether or not the sorting state is normal, making the present invention reliable.

Embodiment 2 FIGS. 4 and 5 show a second embodiment of the present invention, in which FIG. 4 is a perspective view of a grain sorting plate, and FIG. 5 is an enlarged cross-sectional view taken along line BB in FIG. 4. be.

In the device of the present invention shown here, the installation position of the piezoelectric element as the grain amount measurement sensor 28 on the grain sorting plate 5 is directly below the opening hole 40 provided in the middle part of the plate surface of the swinging side 18; And, it is directly below the opening hole 41 provided in the middle part of the plate surface of the swinging side 19. Each piezoelectric element is provided directly below the opening holes 40, 41 by brackets 44, 44 fixed to the wall 42 of the swinging side 18 or the wall 43 of the swinging side 19. In this way, the swinging upper side 18 and the swinging lower side 19
When provided in the middle of the plate surface, it is possible to achieve the purpose of making it possible to perform comparative detection even with only two locations, and thereby to automatically control the inclination angle of the grain sorting plate. Furthermore, as described above, since the detection timing is earlier than in Example 1, it is possible to detect and deal with the tendency of the separation to be uneven at an early stage. Note that the grain amount measurement sensor 28 made of a piezoelectric element is
As shown by the imaginary line in the lower part of FIG. 5, it can also be provided in the same manner as described above on the lowermost grain sorting plate 5. In that case, a gutter 45 is required to return the fallen grains to the extraction gutter.

<Effects of the Invention> The automatic sorting plate angle adjustment device in the grain oscillating sorter with the above structure has extremely high sensitivity, high precision, and good durability using a grain amount measurement sensor using a piezoelectric element. It has become a common technology and can be adopted in various types of automatic hulling machines.
By adopting it in a paddy sorting machine, it became possible to quickly and accurately automatically sort brown rice, paddy, and mixed rice.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the grain sorting plate, and FIG. 2 is a sectional view taken along the line AA in FIG. FIG. 3 is a configuration diagram of an automatic adjustment circuit. FIG. 4 is a perspective view of the grain sorting plate, and FIG. 5 is an enlarged sectional view taken along the line BB in FIG. 4.
FIG. 6 is a partially cutaway side view of the automatic rice hulling machine. 5... Grain sorting board, 9... Gradient control device, 10
... Supply section, 11 ... Shake-up side discharge section, 12 ... Mixed rice discharge section, 13 ... Shake-down side discharge section, 28a, 2
8b, 28c... Grain amount measuring sensor, 30... Control circuit, 40, 41... Opening hole, 42... Wall on swinging side, 43... Wall on swinging side, 44... Bracket.

Claims (1)

[Claims] 1. A grain sorting plate 5 swingably installed in the swinging section.
In a grain rocking sorter equipped with a gradient control device 9 that makes it possible to control the slope of the lateral inclination that is higher on the rocking side than on the rocking side, the grain amount measuring sensor 28 on the grain sorting plate 5 is used. An automatic sorting plate angle adjustment device in a grain oscillating sorter characterized by using a piezoelectric element. 2. The grain according to claim 1, wherein the piezoelectric element serving as the grain amount measurement sensor 28 is installed on the grain sorting plate 5 at the supply section 10, the swinging side discharge section 11, and the swinging side discharge section 13. Automatic sorting plate angle adjustment device in a grain oscillating sorter. 3 The installation position of the piezoelectric element as the grain amount measurement sensor 28 on the grain sorting plate 5 is directly below the opening hole 40 provided in the middle part of the plate surface of the swinging side 18 and in the middle of the plate surface of the swinging side 19. An automatic sorting plate angle adjustment device in a grain swinging sorter according to claim 1, wherein the sorting plate angle is directly below the opening hole 41 provided in the grain swing sorting machine.