JPH0143169Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" The present invention includes a hulling section having a pair of de-rolls,
It is equipped with a hulling wind sorting section that separates rice and rice husks etc. that have been removed from the hulling section, and a sorting section that separates the removed rice into brown rice and paddy, and is also equipped with a shedding rate sensor and a shedding rate adjusting member. , relates to a rice hulling machine that detects the removal rate of the roll and corrects it to a set value.

"Prior Art" Conventionally, a technology has been developed that includes a dehulling ratio adjusting member for adjusting the hulling gap between a pair of derolls and automatically adjusts the hulling gap based on the output of a dehulling rate sensor.

``Problems to be solved by the invention'' In the prior art, the shedding rate of mixed rice that slides down due to the weight difference between paddy and brown rice is detected by a shedding rate sensor. Since the sensor plate was supported by the sensor arm, the impact force of the mixed rice acting on the sensor plate was different from the actual one due to the resistance of the sensor arm's shaft support, and dust and bran were generated during use. There have been problems in that the particles and the like adhere to the movable parts of the sensor, increasing detection errors, resulting in low reliability and difficulty in improving durability.

"Means for Solving the Problem" However, in the present invention, the sensor plate tip detection part of the eluting rate sensor that detects the change in the eluting rate by continuous impact of a certain amount of mixed rice is made of an elastic material, and the sensor plate is made of an elastic material. It is characterized by the rear end of the plate being supported and fixed to the fuselage.

"Operation" By detecting changes in the shedding rate of mixed rice through elastic deformation of the sensor plate, the support structure for the sensor plate can be simplified compared to the conventional one, and the number of components of the shedding rate sensor can be drastically reduced. Detection errors caused by adhesion of dust and bran are almost eliminated, and the reliability and durability can be easily improved compared to the conventional technology.

"Embodiments" Examples of the present invention will be described below in detail based on the drawings. Figures 1 and 2 are enlarged views of the escape rate detection section;
FIG. 3 is an overall view of the rice huller, and FIG. 4 is a cross-sectional view of the same. . In the figure, 1 is a hulling section, 2 is a hopper into which the paddy is thrown, 3 and 4 are a pair of unrollers installed opposite to each other at the lower part of the hopper 2, 5 is a shutter for opening and closing the lower part of the hopper 2, and 6 is each of the above-mentioned A deployment lever 7 for opening the rolls 3 and 4 in an emergency manner by manual operation is a release motor that is a removal rate adjusting member for adjusting the gap between the rolls 3 and 4.

8 in the figure is a winnowing section on which the hulling section 1 is placed, which includes a brown rice take-out gutter 9, a brown rice conveyor 10, and a winnower 11 for removing small rice from the brown rice falling into the gutter 9.
and a small rice take-out gutter 12 that carries the small rice out of the machine.
and a rice conveyor 13, a grain scattering plate 14, and a grain flow board 15, and a grain rice take-out gutter 16 that faces below the rolls 3 and 4 and receives grain rice (brown rice and paddy), and grain rice removal gutter 16 that receives grain rice (brown rice and paddy). It is provided with a conveyor 17, a rice cake take-out gutter 18 and a rice cake conveyor 19 that receive the rice cake separated from the rice that has been rubbed off, and a dust suction and exhaust fan 20 that discharges the rice husks that have been separated from the rice that has been rubbed off to the outside of the machine.

In the figure, reference numeral 21 denotes a sorting section mounted on the wind sorting section 8 and installed in parallel with the hulling section 1, and as shown in FIG. 5, the upper and lower parts rotate continuously in one direction to separate brown rice and paddy Sorting tubes 22, 23 and each of the tubes 22, 23
Support rolls 24...2 that rotatably support the respective supporting rolls 24...2
5..., a mixed rice supply tank 26 provided outside one end of the upper sorting tube 22, a supply conveyor 27, a re-sorting grain conveyor 28, a brown rice receiving conveyor 29 inserted into the upper sorting tube 22, and a rice receiving conveyor 29 inserted into the lower sorting tube 23. Brown rice receiving conveyor 30 and upper and lower brown rice receiving conveyors 2
A rice sorting machine 31 is installed between 9 and 30 and connected in series, and a rice sorting machine 31 is connected to the hopper 2 at the rice discharging end of the upper sorting tube 22.
a chute 32 that communicates with the reselection conveyor 2
8 to the lower sorting cylinder 23
, a chute 34 that slides down the mixed rice discharge end of the lower sorting cylinder 23 and connects it to the rice take-out gutter 16, and a chute 35 that connects the brown rice receiving conveyor 30 to the brown rice take-out gutter 9.

A brown rice lifting conveyor 36 whose lower end side communicates with the brown rice conveyor 10, and a sorting rice lifting conveyor 37 whose lower end side communicates with the scraped rice conveyor 17 are erected along the outside of the machine, The upper end of the sorted rice lifting conveyor 37 is communicated with the supply tank 26 through a connecting pipe 38;
The upper end of a bypass pipe 39 is connected to the connection pipe 38, and the upper end of a bypass pipe 39 is connected to the connecting pipe 38, and the bypass pipe 39 is a bypass path that separates the rice scraped from the hulling section 1 and the returned mixed rice from the sorting section 21 to flow to the sorting section 21. The lower end of the bypass pipe 39 is connected to the joining hopper 40 between the conveyor 17 and the lifting conveyor 37, and each conveyor 3
6 and 37, the bypass pipe 39 is installed along the outside of the machine.

1 and 2 are enlarged sectional views of the bypass pipe 39, in which a container 41 for measuring the falling weight is installed inside the bypass pipe 39, overflow gutters 42, 42 are integrally formed on both sides of the container 41, and Container 41
The container 41 is kept filled with mixed rice at all times, and excess mixed rice is allowed to leak from the upper edge of the container 41 into the overflow gutter 42. A grain outlet 43 is opened in the center of the lower part of the container 41, and a certain amount of the mixed rice is The mixed rice is made to fall continuously.

Further, photoconductive overflow sensors 44, 44 for detecting overflow grains are attached to the inner wall of the overflow gutter 42, and a window 45 is provided opposite to the sensor 44 to take in external light to be sensed by the sensor 44. A gutter 42 is opened on the outer wall, a window 45 is closed by a transparent plate 46, and the gutter 42
The sensor 44 is configured to detect whether or not grains are falling.

Furthermore, a sensor plate 47 is provided which receives the continuous impact weight of a certain amount of mixed rice flowing down from the outlet 43 of the container 41, and the plate 47, which is tilted downward, is made of an elastic material such as a leaf spring. The rear end is fixed to the body by a bracket 48, and a fulcrum arm 49 serving as a bending fulcrum is brought into contact with the lower surface of the rear end of the plate 47 so as to be adjustable in position. A permanent magnet 50 is fixed to the intermediate upper surface of the plate 47, and a Hall element 51 is disposed above the magnet 50 so that the contact can be adjusted freely by a bracket 52, and each member including the sensor plate 47 and the Hall element 51 is used as an evasion rate sensor. A
The magnet 50 is separated from the Hall element 51 by the downward bending of the plate 47 due to the weight of the mixed rice, and the removal rate of the mixed rice is measured by the output of the Hall element 51 based on the weight difference between paddy and brown rice. It is configured as follows.

As shown in FIG. 6, the derollers 3 and 4 supported on support shafts 53 and 54, respectively, are disposed inside facing the hulling case 55, and a transmission gear 5 is mounted on each support shaft 53 and 54.
6 and 57, and the rice hulling case 5
5 is provided with a gear case 58, and the gears 56, 57
is installed inside the case 58. Also, the power shaft 5
A drive gear 6 is inserted into the case 58 via 9 and 60.
1 and 62, and each gear 56, 61 and 57,
62 are always in mesh with each other, and the spindle 54 of one of the derolling wheels 4 is supported between the gap adjustment links 63, and one end of the link 63 is supported coaxially with one of the power shafts 60. A gap adjustment shaft 66 is provided which is interlocked and connected to the removal motor 7 via gears 64 and 65, and a threaded portion 66a at one end of the shaft 66 is screwed to the other end of the link 63 via a bearing member 67. Demotor 7
The structure is such that the hulling gap 68 between the de-rolls 3 and 4 is enlarged or reduced by forward/reverse control.

FIG. 7 is a control circuit diagram of the removal rate motor 7, which includes a removal adjustment circuit 70 having an removal rate setting device 69 that initializes the removal rate reference value, and is controlled by the adjustment circuit 70 based on the output of the removal rate sensor A. The motor 7 is configured to be driven and controlled via forward rotation or reverse rotation circuits 71 and 72.

The present invention is configured as described above, and when the hulling operation starts, the mixed rice scraped from the hulling section 1 is supplied to the sorting section 21, where it is separated into paddy and brown rice, and the paddy is returned to the hopper 2. At the same time, a part of the mixed rice supplied to the sorting section 21 flows into the container 41 of the bypass pipe 39, and a certain amount is deposited on the sensor plate 47 from the outlet 43 of the container 41. The amount of elastic deformation of the sensor plate 47 that is bent by the falling impact of the mixed rice is detected by the Hall element 51, and the output of the Hall element 51 and the escape ratio reference value of the setting device 69 are calculated. The adjustment circuit 70 compares the results, and the dehulling motor 7 is rotated in the forward and reverse directions so that they match, thereby expanding or contracting the hulling gap 68, thereby keeping the rate of removal of the mixed rice substantially constant as it slides off from the dehulling rolls 3 and 4. It is.

Furthermore, FIG. 8 is an enlarged view of the evasion rate sensor A showing a modification, in which a downstream layer stabilizing part 42a that restricts the flow of grains is formed in the overflow gutter 42, and the part 42a
The light source 4 is connected to the overflow sensor 44 so as to sandwich the
4a are arranged opposite each other to enable the sensor 44 to detect grains without being affected by changes in the flow rate of overflow grains, and a permanent magnet 50 fixed to the upper surface of the sensor plate 47 is provided upright, and the side surface of the magnet 50 is A Hall element 51 is disposed close to the magnet 50, and the magnet 50 is slidably displaced relative to the Hall element 51.

Further, FIG. 9 is an enlarged view of a modification of the eclipse rate sensor A, in which the middle part of the sensor plate 47 is bent upward toward the crank side, and a permanent magnet 50 is fixed to the bent part 47a. is bent and displaced in multiple stages.

Furthermore, FIG. 10 is an enlarged view of a modified escaping rate sensor A, in which a strain gauge 73 is fixed in the middle of the sensor plate 47 in place of the permanent magnet 50 and Hall element 51 of the previous embodiment, and the elasticity of the plate 47 is The deformation is detected by the gauge 73 to obtain the change in escape rate, and the sensor plate 47 is connected to the bracket 48 fixed to the fuselage via the tilt adjustment screw 74.
The inclination angle of the sensor plate 47 is changed with respect to grains falling from the outlet 43 of the container 41, and the yield detection sensitivity is mechanically changed.

"Effect of the invention" As is clear from the above embodiments, the present invention consists of an elastic material for the tip detection part of the sensor plate 47 of the eluting rate sensor A, which detects the change in eluting rate due to the continuous impact of a certain amount of mixed rice. and the sensor plate 4
7.The rear end of the sensor plate 47 is supported and fixed to the body, and by detecting changes in the rate of removal of the mixed rice through elastic deformation of the sensor plate 47, the support structure for the sensor plate 47 is simpler than in the past, and the rate of removal is improved. The number of parts for sensor A can be drastically reduced, and
It has practical effects, such as almost eliminating detection errors caused by the adhesion of dust and bran, and making it more reliable and easier to improve durability than in the past. be.

[Brief explanation of the drawing]

Figures 1 and 2 are enlarged views of the yield sensor section showing one embodiment of the present invention, Figure 3 is an overall view of the huller, Figure 4 is a cross-sectional view of the same, and Figure 5 is an enlarged cross-section of the same. figure,
Fig. 6 is an explanatory diagram of the hulling section, Fig. 7 is a circuit diagram for controlling the removal rate, Fig. 8 is an enlarged view of the removal rate sensor section showing another embodiment, and Fig. 9 is the same showing another embodiment. Enlarged view,
FIG. 10 is an enlarged view of another embodiment. 47...Sensor plate, A...Escape rate sensor.

Claims (1)

[Scope of utility model registration request] At least the tip detection part of the sensor plate of the drop rate sensor that detects the change in rate of drop rate by continuous impact of a certain amount of mixed rice is made of an elastic material, and the rear end part of the sensor plate is supported and fixed to the machine body. De-detection device for rice huller.