JP3020768B2 - Roll type hulling equipment - Google Patents

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 apparatus having a fixed roll and a movable roll capable of adjusting the distance to and from the fixed roll.

[0002]

2. Description of the Related Art In the above-mentioned roll type rice hulling apparatus, conventionally, a rotating shaft of the fixed side roll and an intermediate shaft in a fixed position are interlocked and connected by a transmission belt, and swing around the axis of the intermediate shaft. The rotating shaft of the moving roll is provided at the free end of the movable swing frame, and the intermediate shaft and the rotating shaft of the moving roll are interlockingly connected in a reverse state by a gear transmission mechanism. A transmission system is provided by providing a tension pulley that applies tension to the rolls so that the rolls are driven to rotate in opposite directions and at different peripheral speeds from each other. No. 43331].

[0003]

In the above conventional structure, the power transmission belt for transmitting the power supplied from the outside to the rotating shaft of the fixed roll in the fixed position to the moving roll has a fixed position. Is wound around the transmission shaft, a tension pulley for applying belt tension, a supporting member thereof, a tension spring, and the like are required, the number of parts is large, the structure is complicated, and the cost is high. There was a disadvantage. In addition, due to long-term use, the tension of the transmission belt decreases due to the extension of the transmission belt, the reduction in the spring force of the tension spring, and the like. There are adverse effects such as a decrease in processing performance, and there is room for improvement. An object of the present invention is to eliminate the above-mentioned disadvantages.

[0004]

According to a feature of the present invention, in the roll type rice huller described at the beginning, a free end of a swing frame swingable around a rotation axis of the fixed side roll is provided. An intermediate shaft is provided, and the rotation shaft of the fixed-side roll and the intermediate shaft are swingably linked to the reverse rotation state by a gear transmission mechanism that allows swinging of the swing frame and is linked to the reverse rotation state. The intermediate shaft and the rotating shaft of the moving-side roll are interlocked and connected by a transmission belt, and a screw-type telescopic mechanism for changing and adjusting the distance between the intermediate shaft and the rotating shaft of the moving-side roll is provided. It is in the point.

[0005]

The intermediate shaft is provided on a swing frame that is swingable around the axis of the rotating shaft of the fixed-side fixed roll, and is interlocked and connected by a gear transmission mechanism. Rotational power of the rotating shaft of the fixed-side roll is transmitted to the rotating shaft of the moving-side roll via the rotating shaft. The peripheral speed can be changed by appropriately changing and setting the gear ratio of the gear transmission mechanism or the diameter of the belt winding pulley. The distance between the intermediate shaft and the rotating shaft of the moving-side roll is changed and adjusted by a screw-type telescopic mechanism, and after the belt is adjusted to an appropriate tension state, it is maintained in a fixed state. When moving the roll to adjust the distance to the roll, the intermediate shaft swings around the axis of the rotating shaft of the fixed roll by the support of the swing frame, and the movement of the rotating shaft of the moving roll is controlled. Will be tolerated. At this time, since the center distance between the intermediate shaft and the rotating shaft of the moving-side roll is kept the same, the tension of the transmission belt is kept constant. Also, if the power transmission belt is stretched after a long period of use,
The belt tension can be set to an appropriate state by appropriately adjusting the screw type expansion / contraction mechanism.

[0006]

As described above, with a rational transmission structure, the tension of the transmission belt can always be maintained in an appropriate state by using a screw expansion / contraction mechanism which is simpler than a tension pulley type belt tension applying mechanism. As a result, it is possible to simplify the transmission structure for rotationally driving the rolls in directions opposite to each other and at different peripheral speeds. In addition, it is possible to correct even a decrease in the tension caused by the elongation of the transmission belt by a simple operation, and it is possible to prevent a decrease in the processing performance of the hulling.

[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 huller.
The main configuration is a paddy tank 1, a paddy padding device 2, which is also called a paddy head, a rice sorting unit 3 that sorts a mixture of brown rice, rice hulls, etc., a bucket for mixed rice that lifts and transports a mixed rice of brown rice and paddy. An elevator 4, a supply / transportation unit 5 for drop-conveying the lifted and conveyed mixed rice to the supply unit 6, a rocking / sorting unit 7 for rocking / selecting the mixed rice supplied from the supply unit 6, and obtained by rocking / sorting It comprises a brown rice bucket elevator 8 for lifting and transporting brown rice, and a rice bucket elevator 9 for lifting and transporting rice to the rice tank 1.

When the rice shutter 1a attached to the lower part of the rice tank 1 is opened, the rice in the rice tank 1 is dropped and supplied to the rice hulling device 2 and is drained as described later. The processed material that has passed through the hulling device 2 is a mixture of unmilled brown rice and rice husks, unmilled rice and pity. Rice husks and pity are removed from the mixture in the wind separation unit 3 to leave a mixed rice of brown rice and rice. The removed chaff is collected from the chaff collecting section 3a provided above the wind sorting section 3, and the removed pity is collected from the pity collecting section 3b arranged below the wind sorting section 3.

Mixed rice obtained by removing rice husk and pity is
It is lifted and transported by the bucket elevator 4 for mixed rice. 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 down the supply conveyance section 5 having the inclined chute structure, temporarily accumulates in the supply section 6, and is supplied from the supply section 6 to the swing sorting section 7 at a predetermined supply speed.

The swing sorting section 7 sorts the mixed rice into brown rice and paddy using a plurality of sorting plates that are swung at a predetermined inclination angle. , Is lifted and conveyed again by the mixed rice bucket elevator 4 and circulated.
Therefore, the swing sorting unit 7 is provided with a brown rice discharge chute 7a, a paddy discharge chute 7b, and a mixed rice discharge chute 7c. The paddy from the paddy discharge chute 7b is returned to the paddy receiving hopper 9a, lifted and transported by the paddy bucket elevator 9 together with newly supplied paddy, and supplied to the paddy tank 1. The brown rice finally obtained from the brown rice discharge 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 hulling dropped and supplied from the hulling tank 1 through the hulling shutter 1a is:
While the supply amount is adjusted by adjusting the inclination angle of the supply amount adjustment plate 13, the hulling rolls 11,
12 gaps. The hulling rolls 11 and 12
This is a rubber roll having a predetermined hardness of rubber formed around an iron core, and is driven to rotate in opposite directions at different peripheral speeds. Then, the paddy passing between the two rolls 11 and 12 is dislodged by a shift due to a difference in peripheral speed, a pressing friction action of rubber, and a friction action between the paddies. 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 roll 12. Hereinafter, description will be added based on FIG. 1 and FIG.

Power from a driving pulley (not shown) is transmitted to the input pulley 15 by a belt, and a rotating shaft 17 of the input pulley 15 rotatably supported by a fixed case 16.
The fixed-side roll 12 fixed to the roller is rotationally driven, and the rotational power in the opposite direction is transmitted to the intermediate shaft 19 via the gear transmission mechanism 18. The intermediate shaft 19 is connected to the fixed roll 12.
Is rotatably supported on the free end of the first swing frame 20 which is swingable about the rotation axis Y1. Also, an axis Y parallel to the rotation axis Y1 of the fixed-side roll 12 with respect to the fixed case 16.
The moving-side roll 11 is mounted on a rotating shaft 22 supported at an intermediate portion of a second swinging frame 21 that is swingably supported around the second shaft 2, and a large-diameter pulley 23 attached to the rotating shaft 22 and the intermediate shaft A transmission belt 25 is wound around a small-diameter pulley 24 attached to the motor 19. Further, between the first swing frame 20 and the second swing frame 21, the intermediate shaft 19 and the moving-side roll 1 are provided.
A screw-type expansion / contraction mechanism 26 that can change and adjust the distance between the first rotation shaft 22 and the tension of the transmission belt 25 is interposed, and the free end side of the second swing frame 21 is positioned as described later. The rotating shaft 17 of the fixed roll 12 is
And the rotating shaft 22 of the moving-side roll 11 are operatively connected to rotate in opposite directions at different peripheral speeds.

The screw type telescopic mechanism 26 includes a second swing frame 2
1, a female screw portion 26a is formed on a ring-shaped member 26A which is externally fitted to the rotating shaft 22 and the bearing boss 21a, and the intermediate shaft 19 of the first swing frame 20 abuts on the bearing boss 20A. A screw 26C for expansion and contraction is fixed to the arc-shaped contact member 26B in the axial direction and is internally fitted and supported so as to be relatively rotatable. The screw 26C is screwed into the female screw portion 26a of the ring-shaped member 26A. By the rotation operation, the ring-shaped member 26A and the arc-shaped contact member 26B approach and separate from each other, and the inter-axis distance between the intermediate shaft 19 and the rotating 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 a free end side of the second swing frame 21 via a link 27 extending in a direction away from the rubber roll.
The cylinder body 28b of the pneumatic cylinder 28 is
Is pivoted to. The link 27 and the cylinder rod 2
An iron roller 30 is provided at a pivotal connection point with the second swing frame 21a to provide resistance to the movement of the cylinder rod 28a in the separation direction of the rubber roll.
In a state where the link 27 and the link 27 are bent in a substantially C-shape toward the roll approach direction, the iron roller 30 is moved to prevent the extension swing of the second swing frame 21 and the link 27 due to the roll separation movement. It is configured to be received and supported by the fixed guide plate 31.

The pneumatic cylinder 28 is configured to allow the expansion and contraction operation with a force equal to or higher than a set pressure through a pressure control valve (not shown).
The operating pressure in the direction in which 1 approaches the fixed-side roll 12 is applied directly to the moving-side roll 11 via the link 27. The moving roll 11 is fixed to the fixed roll 1.
2 for moving in a direction away from the fixed guide plate 31.
The mechanical movement resistance is given by the tensioning operation between the second swing frame 21 and the link 27 by the receiving support by the roller and the movement resistance force by the iron roller 30, and each roll 1
Even if the rubber layers 1 and 12 are worn and an impressive pushing force is generated by biting of the paddy, the pushing and spreading of each 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 two rolls 11 and 12, the movable roll 11 is fixed at a predetermined pressure by the pneumatic cylinder 28. 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 the paddy are balanced. However, if the passage amount of the paddy increases for some reason, the roll gap follows. Will spread.

The roll type rice hulling apparatus of the present invention is not limited to the automatic rice huller as in the embodiment, but can be applied to various types of rice hullers.

In the claims, reference numerals are provided to facilitate comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.

[Brief description of the drawings]

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

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

FIG. 3 is a front view of the automatic rice huller.

FIG. 4 is a side view of the automatic rice huller.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Moving-side roll 12 Fixed-side roll 17, 22 Rotary shaft 18 Gear transmission mechanism 19 Intermediate shaft 20 Swing frame 25 Transmission belt 26 Screw-type telescopic mechanism

Claims (1)

(57) [Claims] 1. A roll type rice hulling apparatus comprising: a fixed-side roll (12); and a movable-side roll (11) capable of adjusting the distance to and from the fixed-side roll (12). An intermediate shaft (19) is provided at a free end of a swing frame (20) that can swing around the rotation axis of the roll (12), and a rotation shaft (17) of the fixed-side roll (12) and the rotation shaft (17). An intermediate shaft (19) for allowing the swing frame (20) to swing;
The intermediate shaft (19) and the rotating shaft (22) of the moving-side roll (11) are linked to each other in a reverse rotation by a gear transmission mechanism (18) linked to the reverse rotation. ), And a screw-type telescopic mechanism (26) for changing and adjusting the distance between the intermediate shaft (19) and the rotating shaft (22) of the moving-side roll (11). Hulling equipment.