JPS63178855A - 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 [Industrial Field of Application] The present invention relates to a rice huller equipped with a control means for controlling the culling rate to a set value.

[Conventional technology]

Japanese Patent Application Laid-Open No. 56-91851 as a prior art discloses a pair of de-culm rolls provided at the lower part of a paddy supply hopper, and a paddy supply valve that sets the amount of paddy supplied from the paddy supply hopper to both de-culm rolls. , a rice hulling machine equipped with a shutter provided between the paddy supply valve and the paddy supply hopper, and a mechanism for adjusting the gap between the two deculling rolls; The load current is detected, and the gap between both culling rolls is adjusted so that the load current becomes the load current reference value calculated based on the paddy supply amount according to the set opening of the paddy supply valve and the preset culling rate. It is proposed to automatically control the culling rate by both culling rolls to be approximately equal to a set value by providing a culling rate control means that increases or decreases the culling rate.

[Problem that the invention seeks to solve]

The unweighing operation in this type of hulling machine involves first supplying paddy into the paddy supply hopper with the shutter closed, opening the paddy supply valve to a predetermined opening degree, and then closing the shutter. Since the shutter is opened to start the culling work, a large amount of paddy is supplied to both deweighing rolls at once when the shutter is opened, and the load on both deweighing rolls increases rapidly. Moreover, this sudden increase in load tends to increase as the opening speed of the shutter becomes faster.

Therefore, the load current in both the culling rolls increases when the shutter is opened, and the gap between the culling rolls becomes thicker (widened), so that at the time of starting the culling work, the load current increases when the shutter is opened. In addition to the occurrence of culling failure,
A load acts rapidly on both the culling rolls, and a mechanism for adjusting the gap between the culling rolls also operates rapidly, resulting in problems such as loss of durability.

The present invention aims to eliminate these problems.

[Means to solve the problem]

For this reason, the present invention provides a pair of deweighing rolls provided at the lower part of the paddy supply hopper, a paddy supply valve that sets the amount of paddy supplied from the paddy supply hopper to both the deculmation rolls, and a paddy supply valve and a paddy supply valve. It is equipped with a shutter provided between the hopper and a mechanism for adjusting the gap between both the culm removal rolls, and detects a load current of a motor that drives both the culm removal rolls, and this load current is The culling rate control means is configured to increase or decrease the gap between both the culling rolls so that the load current reference value is calculated based on the amount of paddy supplied by the paddy supply valve and the preset culling rate. The huller is provided with a means for detecting the opening/closing of the shutter and a means for opening/closing the paddy supply valve, and the opening degree of the paddy supply valve is controlled by controlling the opening degree of the paddy supply valve when the shutter is closed. The initial opening is set to be an appropriate opening smaller than the set opening, and a means is provided for setting the set opening in conjunction with the opening of the shack.

[Action/effect of the invention]

With this configuration, the paddy supply valve located between the shack and both deculling rolls is closed to an initial opening degree that is smaller than the predetermined opening degree by an appropriate opening degree before opening the shutter. The valve is opened to a predetermined opening degree in conjunction with the opening of the shutter, and the moment the shack is opened, the amount of paddy supplied to both culling rolls is controlled by the initial opening of the paddy supply valve. Since the amount can be regulated to a small amount depending on the degree of production, it is possible to prevent the load on both culling rolls from increasing suddenly at the moment the shack is opened.

Therefore, according to the present invention, when the shack is opened and the culling work is started, the gap between both the culling rolls is large and wide, thereby reducing the occurrence of culling defects. Since there is no sudden increase in the load on the rollers, and there is no sudden operation of the mechanism for adjusting the gap between the two release rolls, the durability of these rolls can be improved.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a case 2 equipped with a paddy supply hopper 3 at the top, and a pair of left and right deculling rolls 4, 5 provided in the case 2. This shows a rice hulling machine consisting of a paddy, and the paddy supply hopper 3
A shutter 6, a paddy supply valve 7, and a lead roll 8 are provided between the culm removal rolls 4 and 5.

Both of the deculling rolls 4 and 5 are rotationally driven by a motor 9, while one of the deculminating rolls 4 and 5 is of a fixed position type, while the other of the deculminating rolls 5 is of a fixed position type. is configured to move toward or away from the one culling roll 4 by a gap adjustment mechanism 11 driven by an actuator 1o, and the motor 9 is provided with a mechanism for detecting the load current A thereof. The shutter 6 is provided with an opening degree sensor 13 for detecting the opening degree S (ratio of the open position to the fully open position) of the shutter 6.

Furthermore, the paddy supply valve 7 is provided with an actuator 14 for opening and closing the paddy supply valve 7, and an opening sensor 15 for detecting the opening position K of the paddy supply valve 7. There is.

Reference numeral 16 indicates the gap between the two culling rolls 4°5 and the opening K of the paddy supply valve 7 based on the signals from the ammeter 12, the shutter opening sensor 13, and the paddy supply valve opening sensor 15. An electronic control circuit for increasing and decreasing the amount is shown.

This electronic control circuit 16 is configured such that the load current A detected by the ammeter 12 is the set opening Kx of the paddy supply amount setting valve 7.
Silica removal rate control means that increases or decreases the gap between the two culling rolls 4 and 5 so that the load current reference value B is calculated based on the paddy supply amount Q determined by and the preset culling rate X. and set the opening degree K of the paddy supply valve 7 to the set opening degree K of the paddy supply valve 7 when the shutter 6 is closed.
It is also provided with means for setting the initial opening degree MK smaller than X by an appropriate opening degree δ, and setting it to the set opening degree Kx in conjunction with the opening of the shank 6.

To explain this in detail in the flowchart shown in FIG. 2, in step S1 following the start, the
The opening degree S of the shutter 6 is read, and then, in step S2, the initial opening degree MK of the paddy supply valve 7 is calculated from the formula MK-Kx-3, and then, in step S3, it is determined whether the shutter 6 is fully open or not. If it is fully open, step S is executed.
4, the MK is replaced with Kx, but the shutter 6
If the shutter 6 is not fully open, it is determined in step S5 whether the shutter 6 is fully closed. In this determination, if the shutter 6 is fully open, the MK is replaced with zero in step S6.

Then, the process moves to the next step S7, where the paddy supply valve 7
After reading the opening degree K, K and M are read in step S8.
If K<MK, a signal is output to the actuator 14 in the paddy supply valve 7 to open the paddy supply valve 7 (step S9), and the process returns to before step S7, while K >MK, a signal is output to the actuator 14 in the paddy supply valve 7 to close the paddy supply valve 7 (
Step 5IO) After that, the process of returning to before step S7 is repeated, and as a result, the paddy supply valve 7
When the shank 6 is closed, the opening degree K is set as the opening degree KX.
It is possible to set the initial opening degree MK to be smaller than δ by δ, and to set the predetermined opening degree Kx in conjunction with the opening of the shutter 6.

Next, in step Sll, it is determined whether the opening degree S of the shutter 6 is equal to or greater than a predetermined value Sd for controlling the culling rate, and if it is equal to or less than the predetermined value Sd, the process returns to before step S1. , when the predetermined value Sd or more,
The process moves to step S12, where current-based culling rate control is performed.

In addition, the current type de-culling rate control in step S12 includes a step 512a of reading the set de-culling rate Xfc, a step 512b of reading the paddy supply amount Q determined by the set opening degree Kx of the paddy supply valve 7, and a step 512b of reading the set de-cultivating rate Xfc. Step 512c of calculating the load current reference value B from the constant deculling rate curve from the rate step 512e of comparing the load current reference value B; step 512f of widening the roll gap between both culling rolls 4 and 5 when A>B; and step 512f widening the roll gap between both culling rolls 4 and 5 when A<B.
．． 5, and step 312g of narrowing the roll gap.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal sectional front view of a huller, and FIGS. 2 and 3 are flowcharts of control. 1... Husker, 3... Paddy supply hopper, 4.5
...Dulking roll, 6...Shack-17...
・Paddy supply valve, 9... Deculling roll drive motor, 11.
...Gap adjustment mechanism, 12...Ammeter, 13...
・Shack-opening sensor, 14... actuator for opening and closing paddy supply valve, 15... paddy supply valve opening sensor,
16...Control circuit.

Claims (1)

[Claims] (1) A pair of de-rolls provided at the lower part of the paddy supply hopper, a paddy supply valve that sets the amount of paddy supplied from the paddy supply hopper to both the paddy removal rolls, and the paddy supply valve and the paddy supply hopper. It is equipped with a shutter provided between the two dehulling rolls, and a mechanism for adjusting the gap between the two dehulling rolls, and detects a load current of a motor that drives both the dehulling rolls. Equipped with a removal rate control means that increases or decreases the gap between the two removal rolls so that the load current reference value is calculated based on the amount of paddy supplied according to the set opening degree of the supply valve and the removal rate set in advance. A rice huller comprising: a means for detecting opening/closing of the shutter; and a means for opening/closing the paddy supply valve; A rice hulling machine characterized by being provided with means for setting the initial opening to be an appropriate opening smaller than the set opening of the valve, and adjusting the set opening in conjunction with the opening of the shutter.