JPH05168959A - Roll wear warning device of rice huller - Google Patents

Abstract

PURPOSE:To ensure that the condition of a roll which needs to be replaced due to wear is detected. CONSTITUTION:The subject roll wear warning device is for a rice huller with a pair of rollers 11, 12 for rice hulling which are driven to rotate in mutually reverse directions at different peripheral speeds from each other and can freely become close to and leave from the other. In addition, said device is equipped with a detection means 32 for detecting that the interaxial distance between both rolls 11, 12 is below a specified value and an alarm means (buzzer) 34 which works to give a warning based on detection information from a detection means (limit switch) 32.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hulling machine in which one of a pair of hulling rolls which are rotationally driven in opposite directions at different peripheral speeds is provided so as to be able to approach and separate from the other. The present invention relates to a roll wear alarm device.

[0002]

2. Description of the Related Art In such a hulling machine, a pair of hulling rolls (rubber rolls) are rotated in different directions at different peripheral speeds to pass the paddy between the two rolls, and a gap due to a difference in peripheral speed and a rubber It has a hulling head that removes the paddy by pressing friction. In this type of hulling machine, the gap between both rolls (hereinafter referred to as the roll gap) greatly affects the removal rate, while the roll gap gradually expands due to wear of the rolls, so a mechanism for adjusting the roll gap is provided. (For example, Japanese Patent Application No. 2-68371).

As described above, since the roll is used while being adjusted so as to be maintained at a predetermined distance, it can be used for a long time even if the roll is worn. However, if the thickness of the rubber layer of the roll becomes a certain amount or less, the removal rate may decrease due to changes in elasticity,
Problems such as increased damage to the removed brown rice occur.

Therefore, when the roll is worn to a certain extent or more, it is necessary to judge it and replace the roll. In the past, the roll replacement time was determined from the deterioration of the quality of the hulled rice.

[0005]

However, it requires a certain amount of skill to judge the roll replacement timing from the deterioration condition of the quality of hulling. It is possible to accumulate the operating time and replace the rolls when the specified time is reached,
The annoyance and inaccuracies cannot be overlooked. The present invention has been made in view of the above circumstances, and it is an object of the present invention to make it possible to accurately know that roll replacement has become necessary due to roll wear.

[0006]

SUMMARY OF THE INVENTION In a roll wear alarm device for a huller of the present invention, one of a pair of hulling rolls that are rotationally driven in opposite directions at different peripheral speeds approaches the other. It is provided so as to be separable, and its characteristic configuration is a detection means for detecting that the axial distance between the two rolls has become a predetermined distance or less, and an alarm activation based on the detection information of the detection means. And an alarm means to operate.

[0007]

As the rolls are worn, the distance between the rolls is gradually reduced as a result of the roll gap being adjusted to maintain the predetermined distance. Therefore, according to the above-described characteristic configuration, the detection unit detects that the axial distance between the two rolls has become equal to or less than the predetermined distance, and the alarm unit issues an alarm based on the detection information.

[0008]

Therefore, it is possible to accurately know from the alarm of the above-mentioned alarm means that the roll needs to be replaced.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 4 and 5 show a front view and a side view of the entire automatic grain huller. The main components are a paddy tank 1, a paddy hulling device 2, which is also called a paddy head, a wind sorter 3 for wind-picking a mixture of brown rice, rice husks, etc., and a mixed rice bucket for lifting and transporting the mixed rice of brown rice and paddy. An elevator 4, a feeding / conveying unit 5 that drops and conveys the mixed rice that has been lifted and conveyed to a supplying unit 6, an oscillating selecting unit 7 that oscillates and selects the mixed rice that is supplied from the supplying unit 6, and is obtained by oscillating and selecting. It comprises a brown rice bucket elevator 8 for lifting and transporting the unpolished rice, a paddy bucket elevator 9 for lifting and transporting the paddy to the paddy tank 1.

When the paddy shutter 1a attached to the lower part of the paddy tank 1 is opened, the paddy in the paddy tank 1 is dropped and supplied to the paddy hulling device 2 and removed as described later. The processed material that has passed through the hulling device 2 is a mixture of debranched brown rice, rice husks, and undipped rice and rice porridge. Rice husks and rice porridge are removed from this mixture by the wind sorting unit 3 to leave a mixed rice of brown rice and rice. The removed rice husks are collected from the rice husk collecting unit 3a provided on the upper part of the wind sorting unit 3, and the removed rice husks are collected from the rice husk collecting unit 3b arranged below the wind sorting unit 3.

Mixed rice obtained by removing rice husks and rice porridge is
The mixed rice is lifted and conveyed by the bucket elevator 4. The bucket elevator 4 for mixed rice carries not only the mixed rice obtained in the wind sorting unit 3 but also the mixed rice obtained in the rocking sorting unit 7, as will be described later. The mixed rice that has been lifted and conveyed falls down the supply and conveyance section 5 having an inclined chute structure, is temporarily accumulated in the supply section 6, and is supplied from the supply section 6 to the swing selection section 7 at a predetermined supply speed.

The rocking / sorting section 7 sorts the mixed rice into brown rice and paddy with a plurality of stages of sorting plates which are swung at a predetermined inclination angle. , Is lifted and conveyed again in the mixed rice bucket elevator 4 and circulates.
Therefore, the rocking / sorting section 7 is provided with a brown rice discharging chute 7a, a paddy discharging chute 7b, and a mixed rice discharging chute 7c.

The paddy from the paddy discharge chute 7b is returned to the paddy receiving hopper 9a, lifted and conveyed by the paddy bucket elevator 9 together with the paddy newly supplied, and supplied to the paddy tank 1. The brown rice finally obtained from the brown rice discharging chute 7a is lifted and conveyed by the brown rice bucket elevator 8 and discharged from the brown rice outlet.

Next, the structure of the hulling device 2 will be described. As shown in FIG. 4, a pair of hulling rolls 11, 1
2. A supply amount adjusting plate 13 and a feeding roll 14 are provided. The paddy dropped and supplied from the paddy tank 1 through the paddy shutter 1a is fed to the gap between the paddy rolls 11 and 12 by the feeding roll 14 while the feed amount is adjusted by adjusting the inclination angle of the feed amount adjusting plate 13. Supplied.

The hulling rolls 11 and 12 are rubber rolls in which a rubber having a predetermined hardness is formed around the iron core, and are rotationally driven in opposite directions at different peripheral speeds. Then, the paddy that passes between the rolls 11 and 12 is removed by the displacement due to the difference in peripheral speed, the rubber pressing action, and the padding friction action. Further, one roll (hereinafter referred to as a movable roll) 11 is the other roll (hereinafter referred to as a fixed roll) 1
It is provided so as to be able to approach and separate from 2.

As shown in FIG. 3, the rotational force of the drive shaft 15 is transmitted to the rotary shaft 16 of the fixed roll 12 via the pulleys 15a and 16a and the belt. From the rotating shaft 16,
The rotating force is transmitted to the relay shaft 17 via the pulleys 16b and 17a and the belt, and is further transmitted to the rotating shaft 18 of the movable roll 11 via the gears 17b and 18a. Gear 17b
And the gear 18a has a gear ratio of 1, and the pulley 16b is smaller than the pulley 17a. Therefore, the movable roll 11 rotates at a lower rotation speed than the fixed roll 12. The rotary shaft 1
The pulley 16c fixed to 6 is for transmitting power to the wind sorting unit 3.

The position of the rotary shaft 16 of the fixed roll 12 is fixed, but the rotary shaft 18 of the movable roll 11 is fixed.
It is configured to be able to move in parallel with the two rotation shafts 16. That is, as also shown in FIG. 1, the gear case 19 accommodating the gear 17b and the gear 18a rotates around the relay shaft 17, whereby the rotary shaft 18 moves toward and away from the rotary shaft 16, and Movable roll 11 is fixed roll 12
It is configured so that it can freely approach and separate from.

The structure for rotating the gear case 19 around the relay shaft 17 is as follows. First, a pair of rotating shafts 21 and 22 screw-connected to the moving member 20 that integrally moves as the movable roll 11 approaches and separates from the fixed roll 12 so as to expand and contract in the axial direction with relative rotation. One of them 21 is supported immovably in the axial direction. That is, the moving member 20 is pivotally attached to the gear case 19 by the shaft center P, is slidably fitted on the rotating shaft 21, and is restricted from moving in the shaft center direction by the collar portions 21a and 21b. There is.
The rotary shaft 21 and the rotary shaft 22 are screwed together by a screwing portion 23.

Secondly, the other 22 of the pair of rotary shafts 21 and 22 is supported by a fixed frame 24, to which the fixed roll 12 is attached, by flanges 22a and 22b so as not to move in the axial direction. There is. The rotary shaft of the electric motor with decelerator 25 supported by the moving member 20 is fixed to the end of the rotary shaft 21, and the knob 26 as the rotary operation means is fixed to the end of the rotary shaft 22. ..

Therefore, if the electric motor 25 is driven to rotate, the rotary shaft 21 rotates, and if the knob 26 rotates, the rotary shaft 2 rotates.
2 rotates, but in both cases, the rotary shafts 21 and 22 expand and contract due to the screw connection at the screwing portion 23 as the rotary shafts 21 and 22 rotate relative to each other. Since the rotary shaft 22 is supported immovably in the axial direction with respect to the fixed frame 24, the rotary shaft 21 moves in the axial direction.

As a result, the moving member 20 moves to rotate the gear case 19 around the relay shaft 17, thereby moving the movable roll 11 toward or away from the fixed roll 12, thereby adjusting the roll gap. As is apparent from the above structure, the roll gap adjustment by the electric motor 25 and the knob 2
This can be performed completely independently of the roll gap adjustment by the rotating operation of 6, and the electric motor 25 does not become a load in the rotating operation of the knob 26.

Although not shown in the figure, the rotary shaft 22
Is supported by the fixed frame 24 via a detent mechanism, and the rotating shaft 22 does not rotate even if the rotating shaft 21 is rotated by the electric motor 25. On the contrary, use the knob 26 to rotate the rotary shaft 22.
When the rotating operation is performed, the rotating shaft 21 does not rotate due to the action of the speed reducer of the electric motor 25.

By adjusting the roll gap as described above, even if the roll is worn, it can be used without trouble to some extent. However, if the thickness of the rubber layer of the roll becomes less than a certain level as the wear progresses, the removal rate will decrease due to changes in elasticity, and damage to the removed brown rice will increase. Therefore, it is necessary to replace the rolls at an appropriate time. Next, the roll wear alarm device provided for this purpose will be described.

The roll wear alarm device includes both rolls 11 and 1.
It comprises a detecting means for detecting that the distance between the two shafts (hereinafter referred to as the distance between the roll axes) has become equal to or less than a predetermined distance, and an alarm means for performing an alarm operation based on the detection information of the detecting means. That is, each time the roll gap is adjusted in accordance with the wear of the roll, the roll shaft distance becomes shorter, and therefore when the roll shaft distance becomes equal to or less than a predetermined distance, the wear limit is warned. Actually, instead of directly detecting the distance between the roll axes, it is detected that the shrinkage of the pair of rotary shafts 21 and 22 that expands and contracts by the above-described screw coupling has reached a predetermined amount or more. Hereinafter, a description will be added based on FIGS. 1 and 2.

As shown in FIG. 1, the electric motor 25 described above is used.
Operation lever 27 for instructing roll gap adjustment by
Is provided. The operation lever 27 is pivotally mounted on the fixed frame 24, and is configured to instruct the electric motor 25 to adjust the roll gap when rotating by a predetermined angle.
That is, when the operation lever 27 is rotated, the U-shaped arm 30 fixed to the tips of the rotation shafts 28 and 29 thereof is rotated around the axis Q and is provided at the tip of the U-shaped arm 30. The micro switch is turned on, and the roll gap adjustment by the electric motor 25 is instructed. In addition, two other micro switches are provided around the U-shaped arm 30 and a device for detecting the contact of the roll is also provided so that the roll gap can be in an appropriate state by these signals. The electric motor 25 is driven in forward and reverse directions, but detailed description thereof will be omitted.

The rotary shaft 29 is slidably fitted on the rotary shaft 28, but is connected to the rotary shaft 28 having a rectangular cross section by a collar portion 29a so as not to be rotatable relative to the rotary shaft 28. Further, the U-shaped arm 30 is pivotally attached to the support member 31 fixed to the moving member 20 by the axis Q. Therefore, when the rotary shaft 21 (moving member 20) moves in the axial direction by the roll gap adjustment as described above, the U-shaped arm 30 and the rotary shaft 29 also move.

Therefore, as shown in FIG. 2, when the rotation shaft 29 moves toward the operation lever 27 side by a predetermined amount or more, the collar portion 2 is formed.
The fixed frame 24 is provided with a limit switch 32 that comes into contact with the 9a and is turned on, and detects that the contraction of the pair of rotary shafts 21 and 22 that expands and contracts by the above-described screw connection has reached a predetermined amount or more. That is, the limit switch 32 corresponds to a detection unit that detects that the distance between the roll axes is equal to or less than the predetermined distance.

The contact signal of the limit switch 32 is input to the control device 33, and the control device 33 is configured to cause the buzzer 34 as an alarm means to sound based on the contact signal.

Other examples will be listed below. In the above embodiment, when the control device 33 is not provided,
The circuit configuration may be such that the buzzer 34 directly sounds by closing the contacts of the limit switch 32. The alarm means is not limited to the buzzer, and may be configured to blink using an LED lamp, for example.

The detection means for detecting that the distance between the roll axes has become equal to or less than the predetermined distance is not limited to the limit switch of the above embodiment, and a non-contact proximity switch or the like may be used. As for the detection method, the rotary shaft 21, the moving member 20, and the like may be used as the directly detected objects. Alternatively, the rotation angle of the gear case 19 around the relay shaft 17 may be detected by a potentiometer or the like.

The roll gap adjusting device of the present invention is not limited to the automatic hulling machine as in the above embodiment, but can be applied to various hulling machines using a roll type hulling head. still,
Reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a roll wear alarm device for a huller according to an embodiment of the present invention (normal time)

FIG. 2 is a configuration diagram of a roll wear alarm device for a huller according to an embodiment of the present invention (when an alarm is activated).

FIG. 3 is a structural diagram of a roll driving unit of a hulling device.

FIG. 4 is a front view of the entire automatic grain huller.

FIG. 5 is a side view of the entire automatic hulling machine.

[Explanation of symbols]

 11 movable roll 12 fixed roll 32 detection means 34 alarm means

Claims (1)

[Claims] 1. A roll of a hulling machine, wherein one of a pair of hulling rolls (11, 12) rotatably driven in opposite directions at different peripheral speeds is provided so as to be able to approach and separate from the other. A wear alarm device, wherein both rolls (11, 1)
A detection means (32) for detecting that the inter-axis distance of 2) has become equal to or less than a predetermined distance, and an alarm means (34) for performing an alarm based on the detection information of the detection means (32) are provided. Roll wear alarm device for huller.