JPS6314944Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is an automatic control device consisting of a control unit and a drive unit that detects the flow velocity or flow pressure of grains by installing a grain flow sensor on the net surface of the mangoku upper net. The present invention relates to an automatic adjustment device for the slope of a mangeki net that is installed within a fuselage frame with a freely adjustable inclination angle.

Normally, in the Mangoku type rice huller, in order to maintain and stabilize the sorting performance and efficiency, the operator always monitors the flow pattern of the ground rice on the Mangoku net, and at the same time uses the visual judgment criteria cultivated through experience from time to time. Therefore, the slope of the Mangokujo net was adjusted. However, this visual judgment requires considerable skill and is difficult to master. In other words, the adjustment of the slope of the Mangokujo net is complex and closely related to many factors such as the properties of the rice, the removal rate, and the size of the mesh. It was extremely difficult to quickly take appropriate measures. However, the conventional automatic device for adjusting the slope of the Mangokujo net is capable of adjusting the slope of the Mangokujo net depending on the amount of milled rice accumulated in the Mangoku funnel and the amount of polished rice supplied to the Mangokujo net. is adjusted somewhat. Alternatively, the slope of the tengoku upper screen is manually set in advance, and then the amount of flowing rice is automatically adjusted. Furthermore, there are cases where the mangoku-age net swings temporarily in order to catch the stagnation of the rolled rice on the net and smooth the flow of the rolled rice, but this does not depend on the skill of the individual operator. The reality is that the adjustment of the slope of the Mangokujo net has not yet been automated.

Here, the visual judgment criterion for the optimum slope of the upper screen is that approximately 70% of the flow of rice on the upper screen flows while the lower 30% flows, as is commonly referred to as "7 minutes of flow, 3 minutes of stagnation." It is said that it is good to stagnate. Therefore, by detecting the flow velocity of the rolled rice flowing down the upper screen, the slope of the upper screen can be automatically adjusted so as to always maintain a constant ratio of the non-stagnation area to the stagnation area. However, when the Mangoku upper net has a gentler slope than the appropriate slope, a lot of unhulled rice leaks into the middle and lower nets, and there is a risk that unhulled rice will mix into the finished rice, so it is necessary to quickly correct the slope.
On the other hand, it takes a certain amount of time to correct the upper screen gradient and to achieve the flow state of the rolled rice caused by the corrected gradient, and when a proper flow state is detected, an incorrect gradient occurs in the opposite direction.

Therefore, this invention prevents the mixing of unhulled rice into the finished rice and quickly adjusts the slope to the appropriate one.If the slope of the upper net is inappropriate for the gentle slope side, the slope is quickly corrected, and the slope is changed to the steep slope side. It is an object of the present invention to provide an automatic upper screen adjustment device for a rice huller that performs slope correction intermittently in special cases.

The present invention will be explained below based on the preferred embodiment shown in the drawings. Fig. 1 is a schematic side view, Fig. 2 is a perspective view of the main part, and Fig. 3 is a block diagram.

In the figure, 1 is a machine frame, and 2 is a mangoku funnel, which feeds milled rice consisting of unhulled rice and brown rice to the mangoku upper net 3. The mangoku upper net 3 is made up of a wooden frame 3c, a net 3d, etc., and is arranged in an inclined manner within the body frame 1. Outside the fuselage frame 1, there are detection circuits 21 and 21' and comparison circuits 22 and 22' consisting of comparator variable resistors.
A control section 9a is formed by logic circuits 23 and 23' consisting of NAND gates, AND gates, etc., and a control circuit 24 consisting of transistors, relays, etc., and further includes a motor, etc., which has a speed reducer and can freely rotate in forward and reverse directions. The automatic control device 9 is formed by adding a drive section 9b. A drive rod 11 is fixed to the drive shaft 10 of the drive section 9b, one end of a connecting drive rod 12 is suspended from the free end of the rod 11, and the other end of the connecting drive rod 12 is attached to the fuselage frame. The upper net adjustment lower shaft 14 is fixedly mounted on the lower shaft 14, and is suspended from one end of an operating rod 13 which is rotatable together with the lower shaft 14. The free end of the lower shaft 14 is fitted into the lower shaft fitting 3a fixed to the lower part of the wooden frame 3c, so that the lower side of the upper screen 3 is supported. Further, one end of an upper shaft connecting rod 16 is suspended from the other end of the operating rod 13, and the other end of the upper shaft connecting rod 16 is located above the upper mesh 3 and is pivoted on the machine frame 1 for adjusting the upper mesh. It is suspended from the free end of the upper shaft drive rod 17 which is fixed to the shaft end of the upper shaft 18 . Upper net support fittings 19 and 19' are fixed to the upper net adjustment upper shaft 18, and the ends of the support fittings 19 and 19' are connected to the wooden frame 3.
The upper side of the upper net 3 is supported by supporting the upper net support ring 3b installed at c.

Next, the grain stagnation region 26 and non-stagnation region 27 on the net 3d surface of the above-mentioned Mangoku upper net 3 are provided with rotating blades 15d and 15d, respectively.
Grain flow sensor 15a _1.1 consisting of rotating shaft 15e
5a ₂ is installed, the sensors 15a ₁ and 15a ₂ are installed on the sensor support part 15b, and the sensor mounting base 15c
The grain flow sensing device 1 is attached to the wooden frame 3c depending on the
form 5. Furthermore, the sensors 15a ₁ and 15a ₂
is connected to the detection circuit 21 through the connection cord 20.
21', respectively, and the output terminals of the detection circuits 21 and 21' are connected to comparison circuits 22 and 22', respectively.
The comparison circuit 22 is connected to a logic circuit 23, and the comparison circuit 22' is connected to a logic circuit 23' via a timer circuit 25.
3 and 23' are connected to a control circuit 24, and the output from the control circuit 24 causes the driving section 9b to rotate in the forward and reverse directions.

In addition, 4 in the figure is the middle and lower net, 5 is the turning paddy conveyor,
6 is a mixed rice conveyor, 7 is a finished rice conveyor, and a lifting device is installed at the end of each conveyor. 8 is a karakinou.

Since the present invention is constructed as described above, each part is activated by predetermined operations, and the unhulled rice is put into the removing device.
After wind sorting, the rolled rice is lifted up to the Mangoku funnel 2 and allowed to flow down onto the net 3d of the Mangoku upper net 3. Therefore, the unhulled rice, etc. with large medium grain size of the ground rice flowing down on the net 3d flows down on the net 3d, passes through the returning paddy conveyor 5, etc., and is returned to the removal device (not shown), where the medium grain size of the ground rice is reduced. Small pieces of brown rice, etc. leak into the middle/lower screen 4. Here, the unhulled rice, etc. flowing down on the Mangokujo net 3 is detected by the grain flow sensor 15.
It collides with the rotating blades 15d of a ₁ and 15a ₂ and flows down. Therefore, an output corresponding to the flow rate is outputted to the control section 9a. As mentioned above, the flow pattern of suri-mai is
It is best for about 70% of the water to flow upstream, and about 30% of the water to be stagnant downstream.
When the installation part of the grain flow sensor 15a ₁ installed in the upstream non-stagnation area becomes stagnate, the detection circuit 21 and the comparison circuit 2
2. Through the logic circuit 23, the drive unit 9b is rotated in the normal direction according to a command from the control circuit 24. Also, when the installed part of the grain flow sensor _15a2 installed in the downstream stagnation area is in a flow pattern, the signal from the control circuit 24 passes through the detection circuit 21', the comparison circuit 22', the timer circuit 25, and the logic circuit 23'. The driving unit 9b is intermittently reversed by the command. The upper grain flow sensor 15a ₁ detects the flow of polished rice, and the lower grain flow sensor 15a ₂
When detecting stagnation of the rolled rice, the drive unit 9b is stopped. The drive shaft 10 is rotated by the normal rotation of the drive section 9b, the connecting drive rod 12 is lowered via the drive rod 11, and the operating rod 13 is then rotated, so that the free side end of the upper mesh adjustment lower shaft 14 is rotated. is lowered, and the lower side of the upper screen 3 is lowered. On the other hand, by raising the upper shaft connecting rod 16 and raising the upper mesh support fittings 19 and 19' fixed to the upper mesh adjustment upper shaft 18, and by raising the upper part of the upper mesh 3, the slope of the upper mesh 3 becomes continuously steeper. Fix it. If the drive unit 9b is intermittently reversed,
Due to the reverse effect of the above operation, the slope of the upper mesh 3 is intermittently corrected to a gentle slope.

As described above, according to the present invention, a timer circuit, etc. is interposed only in the electric circuit that corrects the slope of the upper screen to a gentle slope, so that the slope can be quickly corrected when the slope of the upper screen is gentle and there is a risk of contamination of unhulled rice into the finished rice. When the slope of the upper screen is steep, the slope is corrected intermittently, so that the slope can be quickly corrected to an appropriate slope without going too far.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a schematic side view, FIG. 2 is a perspective view of the main part, and FIG. 3 is a block diagram. In the diagram, 1... Machine frame body, 2... Mangoku funnel, 3...
Mangoku upper net, 3a...Lower shaft metal fitting, 3b...Upper net support ring, 3c...Wooden frame, 3d...Net, 4...Middle/lower screen, 5...Returned paddy conveyor, 6...Mixed rice conveyor , 7... Finished rice conveyor, 8... Karawin, 9...
automatic control device, 9a... control section, 9b... drive section, 10... drive shaft, 11... drive rod, 12...
Connection drive rod, 13... Operating rod, 14... Upper net adjustment lower shaft, 15... Grain flow sensing device, 15a _1.15
a ₂ ... Grain flow sensor, 15b ... Sensor support part, 15c ... Sensor mounting base, 15d ... Rotating vane, 15e ... Rotating shaft, 16 ... Upper shaft connecting rod, 1
7...Upper shaft drive rod, 18...Upper net adjustment upper shaft, 1
9/19'... Upper mesh support fitting, 20... Connection cord, 21/21'... Detection circuit, 22/22'...
Comparison circuit, 23/23'...Logic circuit, 24...
Control circuit, 25...Timer circuit, 26...Stagnation area, 27...Non-stagnation area.

Claims (1)

[Scope of utility model registration request] An automatic control device that adjusts the slope of the upper net is connected to an upper net with a tilt angle that can be freely changed within the frame of the machine, and grain flow sensors are installed in the non-stagnation area and the stagnation area of the grains on the upper net. The rice grains are arranged facing toward each other, and the output end of the sensor is connected to an automatic control device, and a timer circuit or the like is interposed to intermittently adjust the slope only when the mangoku-gami reaches a gentle slope. Automatic adjustment device for the screen on the sliding machine.