JPH078813A - Roll type rice hulling device - Google Patents

Abstract

PURPOSE:To provide the rice hulling device with which the transmission struc ture is simplified and the correction of tensing force of a transmission belt is easily carried out. CONSTITUTION:This roll type rice hulling device has a stationary side roll 12 and a moving side roll 11 freely attachable and detachable to and from this stationary side roll 12 and is provided with a couner shaft 19 at the free end of an oscillation frame 20 which is freely oscillatable around the axial center of rotation of the stationary side roll 12. The revolving shaft 17 of the stationary side roll 12 and the couner shaft 19 are interlocked and connected to a backward rotating state by a gear transmission mechanism which permits the oscillation of the oscillation frame 20 and interlocks and connects the frame in the backward rotating state. The couner shaft 19 and the revolving shaft 22 of the moving side roll 11 are interlocked and connected by a transmission belt. The rice hulling device is provided with a screw type expansion and contraction mechanism 26 which changes and adjusts the intra-shaft distance between the couner shaft 19 and the revolving shaft 22 of the moving side roll 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll-type hulling device provided with a fixed-side roll and a movable-side roll which can be adjusted toward and away from the fixed-side roll.

[0002]

2. Description of the Related Art In the conventional roll type hulling apparatus, in the related art, the rotary shaft of the stationary roll and the intermediate shaft in a positionally fixed state are interlockingly connected by a transmission belt and oscillated around the axial center of the intermediate shaft. The rotating shaft of the moving side roll is provided at the free end of the freely swinging frame, and the intermediate shaft and the rotating shaft of the moving side roll are interlockingly connected in reverse by a gear transmission mechanism, and the midway part of the winding of the transmission belt. There has been a structure in which a tension pulley that acts on each of the rollers to provide a tension force is provided to configure a transmission system so that each roll is rotationally driven in a reverse rotation state and at different peripheral speeds [actual opening flat 3- No. 43331].

[0003]

According to the above-mentioned conventional structure, the transmission belts for transmitting the power supplied from the outside to the rotary shaft of the fixed roll in the fixed position to the moving roll are both in the fixed position. Since it is configured to be wound around the transmission shaft, a tension pulley for applying a belt tension force, its supporting member, a tension spring, etc. are required, and the number of parts is large and the structure is complicated, resulting in high cost. There was a drawback. In addition, due to long-term use, the tension of the transmission belt is reduced due to the elongation of the transmission belt, the reduction of the spring force of the tension spring, etc., and the peripheral speed difference between the rolls is changed to increase the hulling work. There was a problem such as a decrease in processing performance, and there was room for improvement. The present invention aims to eliminate the above-mentioned problems.

[0004]

According to a characteristic construction of the present invention, in the roll type hulling apparatus described at the beginning, a free end portion of a swinging frame which is swingable around a rotation axis of the fixed side roll, An intermediate shaft is provided, and the rotation shaft of the fixed-side roll and the intermediate shaft are linked to each other in a reverse rotation state by a gear transmission mechanism that allows the swing frame to swing and is linked to a reverse rotation state. The intermediate shaft and the rotating shaft of the moving side roll are interlockingly connected by a transmission belt, and a screw type expansion and contraction mechanism for changing and adjusting an inter-axis distance between the intermediate shaft and the rotating shaft of the moving side roll is provided. There is a point.

[0005]

The intermediate shaft, which is provided on the swinging frame that is swingable around the axis of the rotary shaft of the fixed-side fixed roll and is interlocked by the gear transmission mechanism, and the transmission belt from the intermediate shaft. The reverse rotational power of the rotary shaft of the fixed roll is transmitted to the rotary shaft of the movable roll via the rotary shaft. The peripheral speed can be changed by appropriately setting the gear ratio of the gear transmission mechanism or the diameter of the belt winding pulley. The axial distance between the intermediate shaft and the rotating shaft of the moving roll is adjusted by a screw type expansion / contraction mechanism, and is maintained in a fixed state after the belt is tensioned appropriately. When moving to adjust the distance between the roll and the roll, the intermediate shaft swings around the axis of the rotary shaft of the fixed roll by the support of the swing frame to move the rotary shaft of the movable roll. It will be tolerated. At this time, since the axial distance between the intermediate shaft and the rotary shaft of the moving-side roll is kept the same, the tension state of the transmission belt is kept constant. Also, if the transmission belt stretches due to long-term use,
The belt tension can be set to an appropriate state by appropriately adjusting the screw type expansion / contraction mechanism.

[0006]

Therefore, with the rational transmission structure, the tension of the transmission belt can be always maintained in an appropriate state by using the screw expansion / contraction mechanism having a simpler structure than the tension pulley type belt tensioning mechanism. As a result, it becomes possible to simplify the power transmission structure for rotationally driving the rolls in the reverse rotation states and at different peripheral speeds. Moreover, even if the tension force is reduced due to the elongation of the power transmission belt, it can be corrected by a simple operation, and the hulling performance can be prevented from being degraded.

[0007]

Embodiments will be described below with reference to the drawings. 3 and 4 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. The elevator 4, the feeding / conveying unit 5 that drops and conveys the mixed rice that has been lifted and conveyed to the supply unit 6, the oscillating sorting unit 7 that oscillates and selects the mixed rice that is supplied from the supplying unit 6, and the oscillating-sorted It comprises a brown rice bucket elevator 8 for lifting and transporting unpolished rice, a paddy bucket elevator 9 for lifting and transporting 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 the 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 mixed-rice bucket elevator 4 lifts and conveys not only the mixed rice obtained in the wind sorting unit 3 but also the mixed rice obtained in the swing sorting unit 7, as described later. The mixed rice that has been lifted and conveyed falls from 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 oscillating 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. The mixed rice bucket elevator 4 lifts and conveys again 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. The hulling device 2 is provided with a pair of hulling rolls 11 and 12, a supply amount adjusting plate 13, and a feeding roll 14, and the hulls that are dropped and supplied from the hull tank 1 through the hull shutter 1a are:
While the supply amount is adjusted by adjusting the inclination angle of the supply amount adjusting plate 13, the feeding roll 14 is used to roll the hulling roll 11,
It is supplied to 12 gaps. The hulling rolls 11 and 12 are
A rubber roll in which rubber having a predetermined hardness is formed around an iron core, and the rubber rolls 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 deviation due to the difference in peripheral speed, the rubber pressing action, and the padding friction action. Further, one roll 12 is fixed, and the other roll 11 is provided so as to be able to approach and separate from the fixed-side roll 12. Hereinafter, description will be added based on FIGS. 1 and 2.

Power from a drive pulley (not shown) is transmitted to the input pulley 15 by a belt, and the rotating shaft 17 of the input pulley 15 is rotatably supported by the fixed case 16.
The fixed-side roll 12 fixed to the shaft is rotationally driven, and at the same time, rotational power in the opposite direction is transmitted to the intermediate shaft 19 via the gear transmission mechanism 18. The intermediate shaft 19 is the fixed-side roll 12
Is rotatably supported by the free end portion of the first swing frame 20 which is swingable around the rotation axis Y1. Further, with respect to the fixed case 16, an axis Y parallel to the rotation axis Y1 of the fixed roll 12 is provided.
The moving-side roll 11 is attached to a rotary shaft 22 supported in the middle of a second swing frame 21 that is swingably supported around two, and a large-diameter pulley 23 attached to the rotary shaft 22 and the intermediate shaft. A transmission belt 25 is wound around a small-diameter pulley 24 attached to 19. Then, between the first swing frame 20 and the second swing frame 21, the intermediate shaft 19 and the moving side roll 1 are provided.
1 is provided with a screw type expansion / contraction mechanism 26 that can be adjusted by changing the axial distance from the rotating shaft 22, that is, the tension of the transmission belt 25, and the free end side of the second swing frame 21 is positioned as described later. It is held, and as a result, the rotating shaft 17 of the fixed side roll 12 is held.
And the rotating shaft 22 of the moving-side roll 11 are interlockingly connected so as to be rotationally driven in opposite directions at different peripheral speeds.

The screw type expansion / contraction mechanism 26 includes the second swing frame 2
A circle that forms a female screw portion 26a on a ring-shaped member 26A that is externally fitted and attached to the rotary shaft 22 bearing boss portion 21a of 1 and contacts the intermediate shaft 19 bearing boss portion 20A of the first swing frame 20. The expansion / contraction screw 26C is positionally fixed in the axial direction and relatively rotatably internally fitted to and supported by the arcuate contact member 26B, and the screw 26C is screwed into the female screw portion 26a of the ring-shaped member 26A to screw the screw 26C. By rotating the ring-shaped member 26A and the arcuate contact member 26B, the axial distance between the intermediate shaft 19 and the rotary shaft 22 of the moving-side roll 11 is changed and adjusted.

A cylinder rod 28a of a pneumatic cylinder 28 is pivotally connected to the free end side of the second swing frame 21 via a link 27 extending in the rubber roll separating side direction.
The cylinder body 28b of the pneumatic cylinder 28 has a fixed portion 29
Is pivoted to. The link 27 and the cylinder rod 2
An iron roller 30 as a movement resistance body for giving resistance to the movement of the cylinder rod 28a in the rubber roll separating direction is provided at a pivotal connection portion with the second rocking frame 21a.
In a state where the link 27 and the link 27 are bent in a substantially V shape toward the roll approaching direction, the iron roller 30 is installed to prevent the extension swing of the second swing frame 21 and the link 27 due to the roll separating movement. The fixed guide plate 31 is configured to receive and support the fixed guide plate 31.

The pneumatic cylinder 28 is configured to allow expansion and contraction with a force equal to or higher than a preset pressure via a pressure control valve (not shown), and operates in the contraction / retraction direction, that is, the moving side roll 1
The operating pressure in the direction in which 1 approaches the fixed roll 12 is directly applied to the movable roll 11 via the link 27. The moving roll 11 is the fixed roll 1.
For moving in the direction away from 2, the fixed guide plate 31
A mechanical movement resistance is imparted by the tensioning operation of the second swing frame 21 and the link 27 by the receiving and supporting by the iron roller 30 and the movement resistance force by the iron roller 30.
Even if the rubber layers 1 and 12 are worn and a shocking expansion force is generated due to the bite of the paddy, the expansion of the rolls 11 and 12 is suppressed, and the vibration caused thereby is effectively prevented. ing.

As described above, while the paddy is being supplied from the paddy tank 1 to the gap between the rolls 11 and 12, the moving roll 11 is fixed by the pneumatic cylinder 28 at a predetermined pressure. Being pressed against. The gap between the two rolls 11 and 12 is maintained substantially constant in a state where the set pressure and the supply amount of paddy are balanced, but if the pass amount of the paddy increases for some reason, the roll gap follows it. Will spread.

The roll type hulling apparatus of the present invention can be applied not only to the automatic hulling machine as in the embodiment but also to various hulling machines.

It should be noted that although reference numerals are given in the claims for facilitating the comparison with the drawings, the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a hulling device.

FIG. 2 is a plan view of a hulling device.

FIG. 3 is a front view of an automatic huller.

FIG. 4 is a side view of an automatic huller.

[Explanation of symbols]

 11 Moving-side Roll 12 Fixed-side Roll 17, 22 Rotating Shaft 18 Gear Transmission Mechanism 19 Intermediate Shaft 20 Swing Frame 25 Transmission Belt 26 Screw Type Expansion / Contraction Mechanism

Claims (1)

[Claims] 1. A roll type hulling device comprising a fixed roll (12) and a movable roll (11) which can be adjusted closer to and away from the fixed roll (12), wherein the fixed roll An intermediate shaft (19) is provided at a free end of a swing frame (20) swingable around a rotation axis of the roll (12), and the intermediate shaft (19) and the rotation shaft (17) of the fixed-side roll (12) and the rotary shaft (17). The intermediate shaft (19) allows the swing frame (20) to swing,
Further, the gear transmission mechanism (18) interlockingly connected to the reverse rotation state is interlockingly connected to the reverse rotation state, and the intermediate shaft (19) and the rotation shaft (22) of the moving side roll (11) are connected to the transmission belt (25). ) Is interlocked and connected, and is provided with a screw type expansion / contraction mechanism (26) for changing and adjusting the axial distance between the intermediate shaft (19) and the rotation shaft (22) of the moving side roll (11). Hulling device.