JPH0334376B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dehulling device that continuously dehulls paddy by the rotational and sliding frictional action of a pair of derolls.

According to the present invention, a wear detection link for detecting a change in the amount of wear of the roll is pivotally supported on an inter-axle detection link for detecting a change in the distance between the axes for derolling, and the displacement operation of these links is By controlling the gap between the unrolled parts to a constant value based on the sum of , a rice huller that automatically adjusts the desensitization of the roll to a set width and maintains the desensitization of the paddy at a constant level at all times, thereby maintaining the desensitization pressure of the paddy at a constant level during operation and improving the desensitization performance, that is, the dehulling rate. The purpose of this project is to provide a device for removing waste.

An embodiment of the present invention will be described below in detail with reference to the drawings.

Figure 1 is a side view of the huller, and 1 in the figure is a hopper into which the hulled paddy is fed by a threshing machine, etc.;
Reference numeral 2 denotes a removing part that incorporates a pair of removing rolls 3 and 4 that continuously release the paddy flowing down from the hopper 1, 5 a winnowing machine for wind-selecting the removed brown rice, and 6 a wind-selecting machine using the winnowing machine 6. A dust exhaust fan 7 discharges the rice husks, a thrower 7 lifts up the brown rice that has been wind-selected by the chisel 5, and a mangoku section 89 which sorts the brown rice supplied from the thrower 7 is used to finish the rice from the mangoki section 8. This is a thrower for taking out rice, and is configured to perform continuous removal and sorting work.

As shown in FIGS. 2 and 3, the main shaft 10 of the main removing roll 3 is supported by the case 11 of the removing part 2, and the sub shaft 12 of the elongating roll 4
is supported by the link plate 13. and the main shaft 1
The main shaft gear 14 and the sub shaft 12 attached to one end of the
A countershaft gear 15 attached to one end of the first and second
The rotation of the main shaft gear 14 is transmitted to the first and second transmission gears 1 through interlocking transmission gears 16 and 17.
The transmission is configured to be transmitted to the subshaft gear 15 via 6 and 17.

The second transmission gear 17 is attached to a fulcrum shaft 18 that is fixedly supported on the case 11.
One end of a link plate 13 that supports the sub-shaft 12 is supported, and the sub-roll removal 4 is oscillated about this fulcrum shaft 18 via the sub-shaft 12 to form a shaft between the rolls 3 and 4. It is configured to change the distance between the two.

Further, an engaging member 20 is attached to the tip of a roll gap adjustment arm 19 whose base end is swingably supported by a gear fulcrum shaft 18a provided on the same axis as the fulcrum shaft 18 and which supports the sub-shaft 12 in the middle. At the same time, the screw shaft 21 is interlocked with a reversible geared motor 24 through a universal joint 22 and a pair of worm gears 23, and the link is rotated by reversible rotation of the motor 24. The plate 13 is appropriately swung to adjust the distance between the axes of the rolls 3 and 4, that is, the gap between the rolls 3 and 4.

Further, a wear detection roll 26 is attached to the link plate 13 via a wear detection link 25 to detect a change in the amount of wear of the sub-removal roll 4, and an intermediate portion of the link 25 is connected to the link plate 13 using a support shaft 2.
The detection roll 26 is attached to one end of the link 25 via a shaft 28, and the wire 30 is attached to the other end of the link 25 via a circular arc contact surface. It is configured to be fastened with.

On the other hand, a wear detection roll 31 for detecting changes in the amount of wear on the main removal roll 3 is attached to a wear detection link 32 provided on the main removal roll 3 side, and is attached to the case 11 via a support shaft 33 so that the wear detection roll 31 can be oscillated. The middle part of the link 32 is supported, the detection roll 31 is attached to one end of the link 32 via the shaft 34, and the micro switch 3 is attached to the other end of the link 32.
5a and 35b are provided in two stages.

Further, the base end of the contact link 36 is movably supported on the support shaft 33 in the same plane as the link 32, and the switch 35a,
A contact adjustment member 37 for turning on and off the contact adjustment member 35b is attached, and a spring 38 is stretched between the detection link 32 and the contact link 36, and the spring force of the spring 38 normally operates these links 32, 3.
6 are brought into contact with each other, and the member 37 is configured to maintain the ON or OFF operation of the switches 35a and 35b.

Further, the other end of the wire 30 is fixed to the distal end side of the contact link 36 via a clasp 39,
The link 36 is connected to the link 25 on the side of the auxiliary derolling 4 via a wire 30, while the detection rolls 26, 31 are constantly applied to the derolling 4, 31 with a substantially constant pressure.
a spring 40 for sliding contact with the circumferential surface of 3;
41 is stretched over the wear detection links 25 and 32, respectively, so that as the main and auxiliary roll removing rolls 3 and 4 wear out, the links 32 and 25 move around the support shafts 33 and 2.
7 as a fulcrum, the links 32 and 36 are rotated in opposite directions about the shaft 33 to increase the width of the gap between the switches 35a and 3.
5b is configured to release the operation retention state.

Furthermore, a link arm 42 is fixedly installed on a straight line connecting the fulcrum shaft 18 and the sub-shaft 12 of the link plate 13, and the tip of the arm 42 is attached to the wire 30 in a state where the wire 30 between the links 25 and 36 is always kept under tension. the link plate 13 and the link arm 4.
2 constitutes an inter-axle detection link 43. Then, by rotating the motor 24, the auxiliary release roll 4 is rotationally displaced about the shaft 18 (18a), and when the gap between the rolls 3 and 4 reaches the standard setting width, the adjustment member 37 is switched to the switch 35a, 35
b is brought into contact again to maintain its operation.

By the way, the amount of displacement ΔC of the roll gap C, the switches 35a, 35b, and the main body 3 of the adjusting member 37
The ratio of the displacement amount ΔC' of the gap C' between 7a is
2 and the dimension a between the fulcrum shaft 18 and the dimension b between the fulcrum shaft 18 and the tip of the link arm 42. In other words, the distance between the shafts of the unrolled parts 3 and 4 and the switches 35a and 35b
The rate of increase between the width and the dimension between the adjustment member main body 37a is expressed by the relational expression ΔC'/ΔC=b/a.

On the other hand, to explain the relationship between the width increase rate due to wear of the de-rolls 3 and 4 based on the fourth point, the amount of wear AB=EB'∠EFB'=∠QEOsinθ≒EB'/EFEF≒EE'PP'/EE'=PQ/EQEQ=a'PQ=b' Amplification rate PP'/AB≒PP'/EB'×EF/EE'=EF/EB'×PP'/EE
The relational expression ′=1/sinθ・b′/a′ holds true.

As a result, the links 25, 32
and 43 are constructed such that the rate of increase in the displacement of the inter-axial dimension of the rolls 3 and 4 is equal to the rate of increase in the wear of these rolls 3 and 4.

Figure 5 shows this electrical control circuit.
44 is a motor forward rotation drive circuit connected to the battery 45 via the switch 35a; 46 is a motor forward rotation relay coil connected to the drive circuit 44; 47 is a manual operation switch connected to the relay coil 46; This is a relay switch for the relay coil 46 connected to the motor 24, and as the derolling members 3 and 4 wear out, the detection links 25 and 32 swing and displace, causing the adjustment member 37 to move away from the switch 35a by more than a set value. When the switch 35a is turned on, the relay coil 46 is energized via the drave circuit 44, the relay switch 48 is turned on, and the motor 24 is driven in normal rotation to rotate the sub-roll 4 shafts 18.
(18a) is oscillated toward the main release roll 3 side, and the gap C between these rolls 3 and 4 is adjusted to be small.

Further, in the figure, 49 is a motor reversing drive circuit connected to the battery 45 via the switch 35b, 50 is a motor reversing relay coil to which the drive circuit 49 is connected, and 51 is the relay coil connected to the motor 24. 50 relay switch, which turns on the switch 35b when an inconvenience occurs in which the gap between the unrolls 3 and 4 becomes smaller than the set value, for example, at the beginning of work or by operating the manual operation switch 47. The motor 24 is reversely rotated to automatically correct the gap C between the rolls 3 and 4 to a large extent.

In this embodiment, the structure is similar to steam, and the paddy put into the hopper 1 is removed by the removal rolls 3 and 4 of the removal section 2, and the removed brown rice is wind-selected by a winnowing machine 5. The wind-selected rice hulls are discharged outside the machine by the dust exhaust fan 6, and the wind-selected brown rice is sent to the mangoku section 8 by the thrower 7.
The finished rice that has been sorted is taken out to the outside by a thrower 9.

As shown in FIGS. 6 and 7, when the outer circumferential diameter of the unrolled rolls 3 and 4 becomes smaller due to wear or the like during work and the gap C between the rolls 3 and 4 increases to a dimension t, the detection rolls 26 and 31 The link 25 is oscillated counterclockwise and the link 32 is oscillated clockwise about the shafts 27 and 33 following the above. As a result, the wire 3 at the arcuate contact surface of the link 25
0 and pulls the contact link 36 to swing the contact link 36 counterclockwise about the shaft 33. As a result, the link 32 and the contact link 36 are oscillated in opposite directions about the shaft 33, increasing the distance between the tips of these links 32 and 36, and separating the adjustment member 37 from the actuator of the switch 35a. The pressing operation of the actuator of the switch 35a is released to switch the switch 35a from the off state to the on state. As a result, the motor 24 is driven to rotate in the normal direction, the auxiliary derolling roll 4 is oscillatedly displaced toward the main derolling roll 3 side via the adjustment arm 19, and the gap between these rolls 3 and 4 is automatically adjusted to a small size. At this time, the contact link 36 is displaced toward the link 32 by the return spring force of the spring 38 by the slack length of the wire 30 due to the displacement of the auxiliary release roll 4, and a reference is set based on the interval dimension t between the rolls 3 and 4. When the auxiliary release roll 4 is displaced to the position where the gap C is reached, the switch 35a is turned off again by the adjustment member 37, and the gap C between the rolls 3 and 4 is maintained at a constant value set at the reference gap. It is something. In addition,
The link mechanism may be installed on the drive gear side of the roll removal 3, 4, and the links 13, 19 may be configured to be integrated.

As is clear from the above embodiments, the present invention provides an inter-axle detection link 43 for detecting a change in the distance between the axes of the unrolled rolls 3 and 4, and a wear detection link 43 for detecting a change in the wear amount of the one auxiliary roll 4. The link 25 is pivoted 27 on the link plate 13 which is pivoted on the fulcrum shaft 18, and a wear detection link 32 for detecting a change in the amount of wear of the main derolling roll 3 is connected via the support shaft 33. Micro switches 35a and 35b are provided on the link 32, and a contact link 36 is swingably supported on the support shaft 33 in the same plane as the link 32. A contact adjustment member 37 for turning on and off the switch 35b is attached, and the contact link 36 is connected to the link 25 on the side of the auxiliary roll removal 4 via a wire 30, and the displacement ΔC of the roll gap C and the switches 35a and 35b are adjusted. Gap between members 37
The ratio of the displacement amount ΔC' of C' is calculated as follows:
8 and the dimension b between the tip of the link arm 42, and the width increase ratio between the dimension between the axes of the unrolled wheels 3 and 4 and the dimension between the switches 35a and 35b and the adjustment member 37 is These links 2 are arranged as expressed by the relational expression ΔC′/ΔC=b/a.
Derolling 3, by the sum of the displacement operations 5 and 43.
Since the gap C between the rolls 3 and 4 is controlled at a constant level, when the distance between the roll axes changes due to contact and separation of the rolls 3 and 4, or due to wear etc. When the outer circumferential diameter of the paddy changes, the spacing between the rolls 3 and 4 can be automatically adjusted to the set gap C of the appropriate standard, and the gap C between the rolls 3 and 4 can be kept constant at all times. It is possible to improve the dehulling performance, that is, the dehulling rate, by keeping the pressure constant, and it has remarkable effects such as improving work efficiency in dehulling work and improving the quality of threshed grain.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and Fig. 1 is an overall side view of the rice huller, Fig. 2 is a front explanatory view of the main parts, Fig. 3 is an explanatory plan view of the same, and Fig. 4 is FIG. 5 is an electric circuit diagram, and FIGS. 6 and 7 are diagrams illustrating the operating state in FIG. 2. 3, 4... Derolling, 25, 32, 43...
Link, C...Roll gap.

Claims (1)

[Scope of Claims] 1. The one sub-roll 4 is connected to the inter-axle detection link 43 that detects the change in the inter-axle distance of the unrolled rolls 3 and 4.
Wear detection link 25 that detects changes in the amount of wear
A link plate 1 that is pivotally supported on a fulcrum shaft 18.
3, the link 25 is supported by a shaft 27, and a wear detection link 32 for detecting a change in the wear amount of the main derolling roll 3 is swingably provided via a support shaft 33, and micro switches 35a, 35b are attached to the link 32. A contact link 36 is movably supported on the support shaft 33 in the same plane as the link 32, and a contact adjustment member 37 for turning on and off the switches 35a and 35b is attached to the link 36. 36 is connected to the link 25 on the side of the auxiliary roll release 4 via the wire 30, and the ratio of the displacement amount ΔC of the roll gap C and the displacement amount ΔC' of the gap C' between the switches 35a, 35b and the adjustment member 37 is determined. , the distance between the sub-shaft 12 and the fulcrum shaft 18 of the auxiliary roll-off 4 is set to be equal to the ratio of the dimension b between the fulcrum shaft 18 and the tip of the link arm 42; Inter-shaft dimensions and the switches 35a, 35
b and the dimension between the adjustment members 37 is arranged so that it is expressed by the relational expression ΔC'/ΔC = b/a, and the derolling 3 is determined by the sum of the displacement operations of these links 25 and 43. , 4. A dehulling device for rice hulling, characterized in that the gap C between the rice hulls is controlled at a constant level.