JPS607944A - De-“pu” adjustment device for rice huller - 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 The present invention comprises a hulling section having a pair of dehulling rolls, a hulling and sorting section for separating rice scraped from the hulling section from rice husks, etc. The present invention relates to an apparatus that includes a separating section for separating paddy into paddy, and is equipped with a dehulling rate sensor and a spacing adjustment member for the rolls, detects the dehulling rate of the rolls, and corrects it to a set value.

Conventionally, there has been a technique (for example, Japanese Patent Laid-Open No. 57-209645) in which a grain scattering plate is rotatably disposed below between the removing rolls and a change in the angle of the scattering plate is detected. However, the technique described above maintains the load on the motor that drives the roll removal within a preset range;
Control is required to keep the relative change in the load and the roll removal rate approximately constant, but the motor removal load and the roll removal rate change relatively unstable, and the correlation between these changes is required. Since it was difficult to set a reference value for , and control was based on uncertain requirements, precise and accurate control of the withdrawal rate was desired.

The present invention addresses the above-mentioned problems and stabilizes the correlation between the gap between the de-rolls and the deweighing rate, as well as the correlation between the weight of mixed rice (brown rice and paddy) at a constant flow rate and the deweighing rate. By obtaining these values, it is possible to set standard values invariably based on the above-mentioned relationships, detect the true shedding rate required in actual work, and adjust the shedding of rolls through automatic control. It is an object of the present invention to provide a dehulling adjustment device for a huller that improves accuracy and maintains a constant dehulling rate.

Embodiments of the present invention will be described in detail below based on the drawings.

FIG. 1 is an overall view of the rice huller, and FIG. 2 is a cross-sectional view of the same. In the figure, (1) is the hulling section, (2) is the hopper into which the paddy is put, (3) and (4) are a pair of removing rolls installed opposite to each other at the bottom of the hopper (2), and (5) is the is the shutter that opens and closes the lower part of the hopper (2), and (6) is the each roll (3) and (4).
Deployment lever (7) is a release lever that is opened manually by emergency operation, and (7) is a release motor that is a spacing adjustment member that adjusts the spacing between the rolls (3) and (4).

(8) in the figure is a sorting section on which the hulling section (1) is placed, which removes small rice from the brown rice that falls into the brown rice take-out gutter (9) and the brown rice conveyor (10) and the gutter (9). Karakin (11)
) and the rice removal gutter (12) that carries the rice out of the machine.
and receives the scraped rice (brown rice and paddy) facing downward from the scraping rolls (3) and (4) via the grain scattering plate (14) and grain flow plate (15). A drained rice takeout gutter (16) and a washed rice conveyor (17), a rice cake pick-up gutter (18) and a rice cake conveyor (19) that receive the rice grain separated from the washed rice, and a rice husk separated from the washed rice. and a dust suction/exhaust fan (20) for discharging dust to the outside of the machine.

(21) in the figure shows the rice hulling section (1) placed on top of the aforementioned ■ sorting section (8).
), and as shown in Fig. 3, there are upper and lower sorting tubes (22) and (23) that rotate continuously in one direction to separate brown rice and paddy, and each of the tubes (22). Support rolls (24) for rotatably supporting (23)...(
25) ..., a mixed rice supply tank (26) provided outside one end of the upper sorting tube (22), a supply conveyor (27) and a re-sorting grain conveyor (2) inserted into the upper sorting tube (22).
8), brown rice receiving conveyor (29), and lower sorting tube (23)
), a rice sorting machine (31) installed between the upper and lower brown rice receiving conveyors (29) and (30) and connected in series, and a rice sorting machine (31) installed in the upper sorting tube (22) for discharging paddy from the upper sorting tube (22). A chute (32) whose end communicates with the hopper (2), a chute (33) which communicates the re-sorting grain conveyor (28) with the lower sorting cylinder (23), and the mixed rice discharge end of the lower sorting cylinder (23) are slid. A chute (34) that communicates with the dropped rice removal gutter (16) and a chute (34) that connects the brown rice receiving conveyor (30) with the brown rice removal gutter (
9).

and a brown rice lifting conveyor (36) whose lower end side communicates with the brown rice conveyor (10), and a brown rice lifting conveyor (36) that communicates with the brown rice conveyor (10);
Sorting rice lifting conveyor (37) whose lower end side communicates with 17)
) are set up along the outside of the machine, and the upper end of the sorting rice lifting conveyor (37) is communicated with the supply tank (26) through a connecting pipe (38), and the hulling section (
The upper end of the bypass pipe (39) is connected to the connection pipe (38), which is a bypass path that separates the scraped rice from step 1) and the returned mixed rice from the sorting section (21) to the sorting section (21).
The bypass pipe (3) is connected to the joint (40) between the brown rice conveyor (17) and the lifting conveyor (37).
9) Connect the lower ends and install the bypass pipe (39) along the outside of the machine in the same way as each conveyor (36) (37).

FIG. 4 to FIG. 6 are enlarged sectional views of the bypass pipe (39), and the container for measuring the falling weight (41) is connected to the bypass pipe (39).
39), overflow gutters (42) (42) are integrally formed on both sides of the container (41), and the 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). 43), which is configured to continuously drop a fixed amount of mixed rice.

In addition, a sensing shaft (45) is connected to the bypass pipe (39) below the container (41) via a bracket (44).
A sensor arm (46) is rotatably supported and has one end fixed in the middle of the shaft (45).A receiving plate (47) is fixed to the other end, and the receiving plate (47) has the shaft (45) as a fulcrum.
The receiving plate (47) is tilted in the left-right direction substantially perpendicular to the up-and-down swing direction, and the receiving plate (47) is positioned substantially directly below the outlet (43).

The sensing shaft (45) is attached to a potentiometer (49) fixedly supported by a bracket (48).
) are interlocked and connected, and the sensor arm (
Weight arm (50) installed horizontally in the opposite direction to
), as well as a weight arm (51) that hangs vertically downward.
) are respectively fixed to the ends of the sensing shaft (45). Further, a weight (52), which is a balance member that provides a balancing force in the opposite direction to the force acting on the receiving plate (47), is attached to at least one of each weight arm (50) and (51), and a weight (52) is attached to at least one of the weight arms (50) and (51). The mixed rice falling from the receiving plate (47
), and the falling weight of the mixed rice and the weight (52)
The sensor arm (46) and the sensing shaft (45) are rotated by the relative weight change with respect to the outflow port (4).
3) is configured to detect the falling weight of the mixed rice falling from the pot via a potentiometer (49).

As shown in FIG. 7, the de-rolling rolls (3) and (4), which are respectively supported by the support shafts (53) and (54), are installed inside the hulling case (55) and are supported by the support shafts (53) and (54) respectively. ) (54) is the transmission gear (
56) (57), and the paddy case (
55) is provided with a gear case (58), and the gear (56)
(57) It is installed inside the case (58). In addition, drive gears (61) (62) are supported in the case (58) via power shafts (59) (60), and each gear (56) (61)
and (57) and (62) are always meshed, and the spindle (54) of one of the de-rolling rolls (4) is pivotally supported in the middle of the gap adjustment link (63), and one end of the link (63) is It is supported coaxially with the power shaft (60).

and an interstitial shaft (66) interlockingly connected to the removal motor (7) via gears (64) and (65),
The threaded portion (66a) at one end of the shaft (66) is threadedly connected to the other end of the link (63) via a bearing member (67), and the threaded portion (66a) at the other end of the shaft (66)
A slider (68) is screwed onto the slider (68), and the anti-rotation shaft (70) fixed to the machine frame (69) is engaged with the slider (68), while being switched by the slider (68). A maximum opening limit switch (71) is fixed to the machine frame (69), and the switch (71) is configured to detect the movement of the gap adjustment link (63) in the maximum opening direction by the motor (7).

Furthermore, the gap (72) for removing the rice grain from the rolls (3) and (4)
A pointer (73) and a display board (74) are provided to display the pointer (73) via a wing nut (75) at the end of the gap adjustment shaft (66), and the pointer (73) is also displayed on the outer surface of the machine frame (69). At the same time as attaching the plates (74), the removing roll (3)
) (4) is provided with a contact sensor (76) that detects the change in the driving sound when it makes contact, and the sensor (76) is included in the microphone (77) and prevents oil etc. from passing through and only air. A mesh sheet (78) to be passed through is attached to the sound sensing part of the microphone (77), and the gear case (
The microphone (77) is installed in the drive gear (6) which changes depending on the contact of the release rolls (3) and (4).
1) (62) The meshing sound is detected by the microphone (77), and the gap adjustment link (6) is activated by the motor (7).
3), the minimum closing direction movement is detected by the microphone (77).

As shown in FIG. 8, a hook (80) and a rubber cushion (81) are provided on the back side of the gap adjustment operation panel (79), and various switches and indicators for the gap adjustment operation are arranged on the panel (79). At the same time, the hook (80) is locked to the outer surface of the machine handled by the worker in either the rice hulling section (1), the wind sorting section (8), or the sorting section (21), and the installation location can be moved arbitrarily. Attach the panel (79) freely.

FIG. 9 is a control circuit diagram of the removing motor (7), which includes a shutter switch (82) that detects when the shutter (5) at the bottom of the hopper (2) is opened, and the removing roll motor (7). (3) (4) This deployment lever (
6) A hulling interruption switch (83) that detects the operation, a roll change manual switch (84) that opens and opens the de-hulling rolls (3) and (4) when replacing them, and a driving gear sound of the microphone (77). Determine input and unroll (3)
(4) A bandpass filter that detects the noise during contact (
85) and a removal rate setting device (86) for manually setting the removal rate most suitable for sorting (brown rice 88-90%) in the sorting section (21) as a reference value for gap adjustment. It is equipped with a removal control circuit (87) configured by a microcomputer, and includes the potentiometer (49), bandpass filter (85), removal rate setting device (86), and switches (71), (82), and (83). (84) is input connected to the control circuit (87), and the power supply (88)
A main switch (89) and an automatic/manual changeover switch (90) are provided. In addition, the above-mentioned removal motor (
7) is connected to the control circuit (87) via a forward/reverse drive circuit (91), and the changeover switch (90)
And the drive circuit (91) has a gap adjustment manual switch (9
2) is connected to the drive circuit (91) to detect overload of the motor (7), and the control circuit (
87) Includes a current detector (93) that interrupts the output.

Further, a display meter (95) having a plurality of light emitting diodes (94)... is connected to the control circuit (87) via a de-efficiency indicator (96), and the potentiometer (
The detected value of 49) is converted into a rejection rate and displayed.

Further, the gap (72) between the removing rolls (3) and (4),
The correlation between the release rate and the detected value of the potentiometer (49) is shown in Table 1 below.

There are almost no differences depending on the rice variety.

Figure 10 is an explanatory diagram of the operation of the above-mentioned release control circuit (87), in which the main switch (89) is on, the automatic manual changeover switch (90) is switched to the automatic side, and the deployment lever (6) is turned off. It is detected by the roll development circuit (97) through the hulling interruption switch (83), and the hulling supply circuit (98) is detected through the shutter switch (82) to open the shutter (5).
), and when the automatic control requirements are met, the self-help start circuit (99) detects this. Under this condition, the drive circuit (91) is activated by the output of the roll closing circuit (100).
) is used to drive the de-roll motor (7) through the de-roll (3
) (4) in the closing direction. Each role (3) (4)
When the drive gears (61) and (62) make contact with each other and the sound changes, this is detected by the microphone (77) of the contact sensor (76).
), and also sets a reference value (approximately 89 percent) for the removal rate using the removal rate setting device (86) based on Table 1, and sets the reference value to the removal rate setting circuit (101). The roll opening circuit (102
) output drives the motor (7) in the direction of opening the gap (72) via the drive circuit (91), and removes the roll (
3) Open the gap (72) in (4) to the standard gap (1.01 mm).

Under the above conditions, the hulling work is carried out, and the hulling section (1) and
When the scraped rice from the sorting section (8) and the returned mixed rice from the sorting section (21) reach the supply tank (26), they are diverted to the bypass pipe (39) and transferred to the container for measuring the falling weight (4).
1), and when the mixed rice consisting of the scraped rice and turned mixed rice falls from the outlet (13) of the container (41), the mixed rice comes into contact with the receiving plate (47) and this weight The sensor arm (46) is moved downward in proportion to , and the displacement position of the receiving plate (47) is detected by the potentiometer (49) via the sensing shaft (45).

Remove the potentiometer (49) output from the sensor circuit (
108), the comparison circuit (108) compares the reference value of the setting circuit (101) and the detected value of the sensor circuit (108).
104), and when the values match, the output stop circuit (105) detects this and keeps the motor (7) stopped.

Also, the detection value (8
．． 75 volts or more), this increase in the removal rate is detected by the roll opening circuit (106), and the motor normal rotation circuit (106) is detected.
07) The output drives the motor (7) in the direction of opening the gap (72) via the drive circuit (91), and the gap (72) is closed.
The opening operation makes the removal rate match the standard value. When the gap (72) reaches its maximum open state, the limit switch (71) is turned on, which is detected by the output stop circuit (108), and the drive of the motor (7) in the opening direction is stopped. Alert.

Further, the comparison circuit (104) compares the detected value (
3.25 volts or less), it is detected by this rate-decreasing Keror closing circuit (109) and the motor reversing circuit (
110) The output drives the motor (7) in the direction of closing the gap (72) via the drive circuit (91), and closes the gap (72).
) Match the removal rate with the standard value by the closing operation. Then, the interval (72) becomes the minimum closed state, and the unrolling roll (3
)(4), the microphone (77) of the contact sensor (76) causes the drive gear (61) to
(62) Detecting the sound and driving the motor (7) to match a preset reference value via the roll opening circuit (102) to keep the gap (72 open);
An alarm circuit (111) outputs a notification of this abnormal situation.

Furthermore, based on the detected value output of the above-mentioned removal rate sensor circuit (103), the actual removal rate is calculated in the removal rate calculation circuit (112), and the actual removal rate is displayed on the removal rate display circuit (113). (
96), and the meter (95) displays the actual removal rate.
).

On the other hand, by switching the changeover switch (90) to the manual side and manually operating the gap adjustment manual switch (92), the roll opening circuit (106) and the motor normal rotation circuit (10
7) detects the gap opening operation of the switch (92), and drives the motor (7) in the opening direction via the drive circuit (91) to open the gap (72) of the removal rolls (3) and (4). ).

There is also a limit switch (71) and an output stop circuit (10).
Upon detection of the maximum state in step 8), the opening operation of the motor (7) is interrupted and a warning is issued. In addition, the roll closing circuit (109
) and the motor reversing circuit (110) to detect the gap closing operation of the switch (92), and the drive circuit (91)
The motor (7) is driven in the closing direction via the
3) Reduce the gap (72) in (4). In addition, the output stop circuit (114) detects the minimum closed state by the microphone (77) of the contact sensor (76), and each roll (3) (
4) is kept in contact with the motor (7) via the circuit (114), the pointer (73) is set to the zero position by operating the wing nut (75), and the roll ( 3) Correct the gap error caused by wear in (4).

Furthermore, when a foreign object is caught between the removing rolls (3) and (4), the emergency opening operation of the rolls (3) and (4) by the deployment lever (6) is stopped by the hulling interruption switch (83) and the roll deployment circuit ( 97) and roll opening circuit (115).
The motor (7) is operated to open to the maximum via the limit switch (71), and the output stop circuit (116) detects the operation of the limit switch (71) to open the rolls (3) and (4).

Further, when the output of the automatic start circuit (99) is off, manual operation of the roll exchange switch (84) is disabled from the roll exchange circuit (99).
117), the motor (7) is operated to the maximum opening via the roll opening circuit (115), and the limit switch (
71) The operation is detected by an output stop circuit (116) and the rolls (3) and (4) are kept open.

Then, the receiving plate (4) is removed from the falling weight measurement container (41).
The outflow weight per unit time of the mixed rice falling onto the container (7) is maximum when the rice is 100% brown, and the resistance value of the potentiometer (49) is maximized, and it is minimum when the rice is 100% rice, and the resistance value of the potentiometer (49) is the maximum. 49)
Minimize the resistance of In addition, if you increase the ratio of brown rice in the washed rice to increase the shedding rate, the brown rice will be damaged by shedding and its quality will decrease, and at the same time, increasing the proportion of paddy in the washed rice will increase the shedding rate. When the amount of paddy is lowered, the amount of paddy in the sorting section (21) increases, reducing the sorting accuracy by the sorting tubes (22) and (23), and at the same time increasing the amount of returned paddy from the sorting section (21), increasing the Reduce efficiency.

Furthermore, the mixing ratio of brown rice and paddy in the rice scraped below the removal rolls (3) and (4) is the apparent removal rate, and the sorting unit (
The mixed rice returned from 21) is mixed with the scraped rice and sent from the supply tank (26) to the sorting section (21), and the mixing ratio of brown rice and paddy is the true shedding rate.

Furthermore, as is clear from Table 1 and Figures 11 and 12 above, the removal rate of the mixed rice from the supply tank (26) to the sorting section (21) and the distance between the removal rolls (3) and (4) (72)
(Fig. 11), and the correlation between the falling weight of the mixed rice measured by the potentiometer (49) and the above-mentioned shedding rate (Fig. 12), without any difference depending on the rice variety, etc. , obtained with a nearly constant proportional relationship.

Therefore, a container (41), a receiving plate (47), and a potentiometer (49) are provided as means for detecting changes in the weight of the mixed rice for hulling and sorting. means for measuring the removal rate, and means for calculating the interval (72) between each roll (3) (4) based on the removal rate and the gap setting value that is the standard for the removal roll (3) (4); A microphone (77) is provided in the above-mentioned removal control circuit (87) and is a means for automatically setting an initial gap at the time of starting automatic gap adjustment based on the gap setting value of the rolls (3) and (4). It is equipped with a de-rolling control circuit (87), which detects the weight of the mixed rice flowing down to the sorting section (21) using a potentiometer (49), and controls the derolling (3) and (4) using a microphone (77). Detects the sound of the drive gears (61) (62) when they are engaged, and
The standard removal rate (or gap) is set using the rate setting device (86), and the gap (72) of the removal rolls (3) and (4) is automatically adjusted based on the calculation output of the removal control circuit (87). At the start of control, the gap (72) between each roll (3) (4) is made to match the set value, and the removal motor (7) is controlled in conjunction with the potentiometer (49), leading to the sorting section (21). This is to keep the shedding rate of mixed rice almost constant.

As is clear from the above embodiments, the present invention provides a means for setting the gap between the pair of removing rolls (3) and (4), and a means for adjusting the gap (72) between the removing rolls (3) and (4). motor(
In a huller equipped with a gap adjustment member such as 7), a means for measuring the dehulling rate based on a change in the falling weight of mixed rice for hulling sorting to separate grained rice into brown rice and paddy; , and a means for calculating the removal roll interval (72) based on the removal rate and the gap setting of the removal rolls (3) and (4). Compared to the dehulling rate control based on the detection of the dehulling rate and the detection of the hulling load of each roll (3) and (4), it is possible to automatically obtain an extremely precise and accurate dehulling rate. (3) Gap in (4) (
72) It has remarkable effects such as being able to significantly improve adjustment accuracy.

[Brief explanation of drawings]

Fig. 1 is an overall view of a rice huller showing one embodiment of the present invention;
The figure is the same sectional view, FIG. 3 is an enlarged sectional view, FIGS. 4 to 6 are enlarged sectional views of the bypass pipe, and FIG. 7 is an explanatory diagram of the hulling section.
Figure 8 is a side view of the operation panel, Figure 9 is a control circuit diagram of the removal motor, Figure 10 is an explanatory diagram of the operation of the removal control circuit, and Figure 1
Figure 1 is a diagram showing the relationship between removal rate and removal roll gap.
Figure 2 is a diagram showing the relationship between falling weight and removal rate. (3) (4)...Removal ■Roll (7)...Removal ■Motor (72)...Gap (87)...Removal ■Control circuit Kan ) Horror 18 Elimination Table (≠)

Claims (2)

[Claims] (1) In a hulling machine equipped with a means for setting a gap between a pair of de-rolling rolls and a gap adjusting member for adjusting the spacing between the de-rolling rolls, a hulling and sorting machine is used to separate the dehulled rice into brown rice and paddy. It is characterized by providing a means for measuring the removal rate based on a change in the weight of the mixed rice flowing down during the process, and a means for calculating the removal roll gap based on the removal rate and the setting value of the removal roll gap. A release adjustment device for a rice huller. (2) The rice huller according to claim 1, further comprising means for automatically setting an initial interval at the time of starting automatic interval adjustment based on a set value of the interval between the de-rolls for calculating the de-roll gap. Machine release adjustment device.