JPS59186650A - Automatic gap control of hulling roll - 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 relates to an automatic gap adjustment method for hulling rolls.

A pair of left and right rubber rolls for hulling rice are used after being adjusted to a designed gap, but the gap adjustment is generally done based on the intuition of experts.

However, many devices capable of automatic adjustment have been proposed and some have been put into practice.

For example, the method described in Japanese Patent Application Laid-Open No. 56-91851 falls under this category. However, in the known example, the roll is separated for a certain period of time by a matching signal from a current transformer that measures the motor current and a setting device that sets the no-load state, but when this method is used, Due to variations in the manufactured machines, there was a considerable change in the resistance when no load was applied, so there was a drawback that accurate roll gap adjustment was not possible.

In addition, in the case of the above-mentioned known example, the condition is to start hulling with the gap between the rolls slightly widened, and then,
Initially, because the hulling rate is low, the amount of unhulled rice that is sorted by the sorting device increases, and this is returned to the supply tank.
Paddy rice will gradually accumulate in the supply tank.

Therefore, it is necessary to increase the shedding rate to prevent paddy rice from accumulating in the supply tank, but it takes 1.2 minutes even if the roll gap is adjusted somewhat narrower, so the distribution of the sorting device will have a negative impact.

Therefore, the present invention improves this by (1) knowing the motor current in a no-load state using a current transformer;

(2) Regardless of whether the pair of hulling rolls facing each other are in contact with each other or separated from each other, they are moved by a predetermined amount F, - times, in a direction to close the roll gap.

(3) After the operation in (2) above, the motor current is measured with a current transformer, and when it is determined that the hulling roll has contacted the current value in relation to the current value in (1) above, the value of the current transformer is The hulling rolls are moved in the direction of separating each other by the R amount until the phenomenon occurs and no change occurs.

(4) In the operation (2) above, the current value of the current transformer is
If the current value does not change from the current value of +) and it is determined that the hulling rolls are not in contact, move in the direction of closing the roll gap by F fi: until the value of the current transformer increases and it is determined that there is contact. let

(5) As a result of the operation in (4) above, when the value of the current transformer increases and it is determined that the hulling roll has contacted the current transformer, the value of the current transformer decreases by the amount R until it no longer changes. , move the hulling rolls in the direction of separating them.

This method was adopted.

To explain with the drawings, Fig. 4 shows an embodiment in which the rolls can be adjusted and moved, 1 is a fixed hulling roll, 2 is a movable hulling roll, and the lower end of the movable hulling roll 2 is connected to the case by a shaft 3. The swing arm 4 is fixed by a shaft 5 at an intermediate position between the upper and lower sides thereof. A top 6 is attached to the upper end of the swinging arm 4 above the position of the shaft 5, and a threaded portion 8 formed at the tip of a screw punch 7 is screwed into the top 6. The opposite side of the threaded part 8 of the screw punch 7 is a base 9, which protrudes outward from a through hole 10a formed in the case 10, and a spring receiving plate 26 is provided in the front side of the through hole 10a. Several bearings 11 are mounted on the spring receiving plate 26 and are fixed by the hair ring 11, and a pin 12 is passed through the end thereof so as to be perpendicular to the base 9. 13
is a flange fitted on the outside of the end of the base 9, and is fixed to the base 9 with the pin 12. The base 9 of the screw punch 7 protrudes from the through hole 10a of the case 10 as described above, and a cylindrical body 27 is formed on the outer periphery of the base 9, and is mounted inside the cylindrical body 27. A compression coil spring 14 is interposed between the flange 13 attached to the base 9 of the screw punch 7 and the bottom of the cylindrical body 27 of the case 10. In FIG. 4, it is pressed to the left to urge the screw rod 7 to constantly move to the left. The outer peripheral surface of the compression coil spring 14 and the cylinder body 27 are disposed, and an inner cylinder 15 is provided in the gap therebetween. The inner cylinder 15 is formed long in the axial direction of the screw punch 7, and has a manual rotation handle 16 at its outer end. Several protrusions 17 are provided in the axial direction on the inner surface of the inner cylinder 15, and the tip of the bottle 12 engages with the protrusions 17. A gear 18 is provided in the inner cylinder 15, and a gear 19 is attached to the gear 18.
are in mesh with each other, and the gear 19 is connected to the rotating shaft 2 of the forward/reverse motor 2o.
Fixed to 1.

The forward/reverse rotation motor 2o is rotated in the forward/reverse direction by a forward/reverse device M22. 23 is a supply port, 24 is a feeding roll, and 25 is a control valve. A collar 28 is provided at the portion where the bearing 11 is located. The collar 28 is attached to the screw punch 7 by welding, and when the collar 28 partially fits into the center gap of the bearing 11 and comes into contact with it, the screw punch 7 stops. The contact surface of the collar 28 is formed into a teeper surface 29 or a rounded surface (arc surface).

Next, we will discuss the effect.

Analog multiplexer "7" is connected to P2 shown in Figure 5.
When the specified information is set and output, the analog quantity is input to the comparator. Therefore, P3.4 adjusts the digital amount while looking at the output of the comparator, and adjusts the analog amount (
digitize the motor current).

(Roll adjustment of F amount) When H is output to bit 0 of P8 in Fig. 5 and H is output to bit 0 of PL, the roll gap closes, and at the same time,
An internal timer is started, the amount of movement F is measured for a certain period of time, and when the time is up, bit 0 of P8 is cleared and bit 0 of PL is set to L.

(Roll adjustment of F amount) When H is output to bit o of P8 and bit o of PI, the roll gap opens. At the same time, an internal timer is started to measure the amount of movement R for a certain period of time, and when the time is up, bit o of P8 is set to H and bit 0 of Pi is set to L.

With the above basic movements in mind, the actual roll adjustment will be explained. Even if the rolls 1.2 are open as shown in Figure 2, or are fully in contact as shown in Figure 3, there is no difference between rolls 1 and 2. Regardless, it is moved only once in the direction of closing by the F amount. Then, in the case of Figure 2, Figure 2 A may be
As an illustration, in this state, roll 1.2 is still open, so the motor current 4111 list price due to the current transformer does not change from the previous ΔIII constant price. Then, it is decided to close F#: again, and when this is repeated, the state shown in Fig. 2 C is reached, and the rolls 1.2 are brought into contact. Therefore, the current measurement of the motor by the current transformer changes so that roll 1.
2 shows that there was contact. Therefore, the motor 20 is reversed to separate the roll 2 by an amount R, resulting in the state shown in FIG. 2. Furthermore, even if the rolls 1.2 are in contact with each other from the beginning as shown in FIG.
is moved in the direction of closing by the amount F. Then, as in the case of the opening in Figure 3, it will once close firmly, but from then on, just as in Figure 2, it is only necessary to pull it apart by Ri゛.

The present invention has the following features: (1) The motor current in a no-load state is known using a current transformer.

(2) A pair of opposing hulling rolls is moved in a direction to close the roll gap by a predetermined amount F, - times, regardless of whether they are in round contact or separated. .

(3) After the operation in (2) above, the motor current is measured with a current transformer, and when it is determined that the hulling roll has contacted the current value in relation to the current value in (1) above, the value of the current transformer is The hulling rolls are moved in the direction of separating each Ri until the phenomenon occurs and no change occurs.

(4) In the operation (2) above, the current value of the current transformer is
If the current value does not change from the current value in 1) and it is determined that the hulling rolls are still not in contact, move the rolls one by one in the direction of closing the gap between the rolls until the value of the current transformer increases and it is determined that there is contact. .

(5) As a result of the operation in (4) above, when it is determined that the value of the current transformer has increased and the hulling roll has come into contact with it, the value of the current transformer decreases and the R amount continues until it does not change further. Then move the hulling rolls in the direction of separating them.

This automatic gap adjustment method for hulling rolls has the advantage of being quick and easy to adjust.

[Brief explanation of drawings]

Fig. 1 is a flowchart of the roll gap, Fig. 2 is an adjustment state diagram with the rolls open, Fig. 3 is an adjustment state diagram with the rolls closed, and Fig. 4 is a sectional view of the main parts. FIG. 5 is a circuit diagram. Explanation of code Fixed hulling roll 1. Mobile hulling roll 2, shaft 3, swinging arm 4
, shaft 5, top 6, screw 7, threaded part 8, base 9. Case 1
0, through hole 10a, bearing 11, pin 12, collar 13
, compression coil spring 14, inner cylinder 15, manual rotation handle 1
6, protrusion 17, gear 18, gear 19, forward/reverse motor 2
0, rotating shaft 21, forward/reverse device 22, supply port 23, feeding roll 24, regulating valve 25, spring receiving plate 26, cylinder body 27, collar 28° Patent applicant Iseki Aki Co., Ltd. Drawing engraving (in the contents) (No change) Figure 1 Figure 2 Figure 3 Figure 5 Procedural amendment (Shark) May 13, 1981 1. Indication of the case 1988 Patent Application No. 60484 2. Title of the invention Automatic gap adjustment method 3, relationship with the case of the person making the amendment Patent applicant 4, agent

Claims (1)

[Claims] The following automatic gap adjustment method for hulling rolls. (1) Know the motor current in no-load condition using a current transformer. (2) Opposing - Regardless of whether the pair of hulling rolls are in contact with each other or separated, they move in the direction of closing the roll gap by a predetermined amount of F, - times. let (3) After the operation in (2) above, the motor current is measured with a current transformer, and when it is determined that the hulling roll has contacted the current value in relation to the current value in (1) above, the value of the current transformer is The hulling rolls are moved in the direction of separating each other by the R amount until the phenomenon occurs and no change occurs. (4) In the operation (2) above, the current value of the current transformer is
If the current value does not change from 1) and it is determined that the hulling rolls are not in contact, move the rolls by an amount of F in the direction to close the gap between the rolls until the value of the current transformer increases and it is determined that there is contact. . (5) As a result of the operation in (4) above, when it is determined that the value of the current transformer has increased and the hulling roll has come into contact with it, the value of the current transformer decreases and the R amount continues until it no longer changes. Then move the hulling rolls in the direction of separating them.