JPS6317499B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic derolling adjustment device in a rice hulling machine, and more specifically, to an automatic derolling adjustment device for a rice hulling machine, and more specifically, an automatic derolling device that presses a floating derolling device against a fixed derolling device under constant pressure in response to wear of the derolling device. This invention relates to an automatic derolling adjustment device that automatically adjusts the roll release.

Generally, the derolling is easily worn out, so if both of the pair of derolling are fixed, the derolling pressure will fluctuate and the derolling efficiency will gradually decrease. Various measures have been taken in the past to solve the above problem by making one of the pair of unrollers movable, but no effective solution has yet been proposed.

This invention effectively solves these conventional problems, and its purpose is to improve the removal efficiency by automatically bringing the floating removal roll into contact with the fixed removal roll at a constant pressure. The present invention provides an automatic derolling adjustment device as described above.

Hereinafter, a preferred embodiment of the present invention will be described based on the accompanying drawings.

FIG. 1 is an explanatory cross-sectional view of a rice huller 1 embodying the present invention, in which 3 is a hopper, 5 is a shutter,
7 is a paddy feed roll, 9 is a fixed unrolling, and 11 is a floating unrolling. The fixed unrolling 9
is rotated via chain 13 by rotation of an electric motor (not shown). The rotation of the fixed derolling roll 9 is transmitted to the paddy feed roll 7 and the floating derolling roll 11 via the gears 15, 17 and 19, respectively, and rotates them.

Reference numeral 21 denotes an arm, the lower end of which is pivotably mounted around the center position 23 of the gear 19 as a fulcrum, and the tip thereof is pivoted and provided with a threaded portion 25.

Reference numeral 27 denotes an adjustment rod, which is provided with a screw at one end and engages with the threaded portion 25 of the arm 21, and an adjustment device 29 is provided at the other end.

As shown in FIGS. 2 and 3, the structure of this adjustment device 29 is such that a metal 33 having a protrusion 31 is fixed to the rear end of the adjustment rod 27, and this metal 33 is inserted between it and the machine frame 35. 37 is interposed.
39 is a hand holder, and a worm wheel 41
is loosely fitted, rotatably supported on the machine frame 35, and positioned with respect to the adjustment rod 27 by a bolt 43. A locking body 45 is provided inside the hand holder 39 and is engaged with the protrusion 31 of the metal 33. The worm wheel 4
1 is provided with a notch 47, and an adjustment handle 49
It can be freely engaged with and detached from the tip 51 of. 53 is a protruding body provided on the hand holder 39.

The adjustment handle 49 is attached to the hand holder 39
A protrusion 55 that is loosely fitted into the handle and engages with the protrusion 53 of the hand holder 39 when the adjustment handle 49 is pulled.
is provided.

A spring 57 pushes the adjustment handle 49 toward the worm wheel 41. A worm 59 meshes with the worm wheel 41. A servo motor 61 rotates the worm 59.

Further, the adjustment rod 27 is provided with a locking mechanism 62, and the locking mechanism 62 is connected to the machine frame 35, a locking member 63 that contacts the machine frame 35, and a spring 37 as a pressurizing device. When the adjustment rod 27 is pulled against the spring 37 in the left direction in FIG.
A gap is created between the machine frame 35 and the locking member 63. Then, a gap detection device 65 that detects this gap,
The locking mechanism 62 is provided with the locking mechanism 62 . In this embodiment, the gap detection device 65 consists of a device in which the locking member 63 is insulated from the machine frame 35, and the locking member 63 and the machine frame 35 are considered as one switch, but the locking mechanism 62 Any device can be used as long as the gap can be detected, and it can be configured by, for example, a micro switch, a photoelectric switch, a differential transformer, or the like.

In addition, a fixed roll-off roll 9 and a floating roll-off roll 11 are also provided.
The hopper 3 is equipped with a paddy detection device 6 in the hopper, such as a limit switch, as a paddy detection device A that detects a state in which paddy is not supplied between the hopper and the hopper.
A shutter opening/closing detection device 69, such as a limit switch, is provided on the machine frame 35 above the shutter 5.

The automatic derolling adjustment device 71 includes the gap detection device 65 and the paddy detection device 6 in the hopper.
5 and the shutter opening/closing detection device 69. As shown in FIG. , a relief pressure adjusting device 75 that adjusts the relief pressure of the floating detachment roll 11 to a constant level, and a floating detachment roll separation device that moves the free detachment roll 11 by a fixed amount in a direction away from the fixed detachment roll when the detachment operation is not performed. It is comprised of a device 77, a manual switch gap adjustment device 79 for adjusting the gap between the fixed roll-off roll 9 and the floating roll-off roll 11 using a manual switch, a servo motor forward/reverse control device 81, and the like.

The start and stop control device 73 is composed of a start switch _S1 , a stop switch _S2 , and a relay _R1 . By pressing the start switch _S1 , the relay _R1 becomes energized. switched and held;
Also, by pressing stop switch S ₂ , the relay can be
_R1 is switched to and held in a non-excited state.

The pressure relief adjustment device 75 is connected to the relay R ₁
, a gap detection device 65, a rice grain detection device 67 in the hopper, a shutter opening/closing detection device 69, and a relay _R2 . Then, the gap detection device 65
The locking mechanism 62 is in the closed state when there is no gap, the paddy detection device 67 in the hopper is in the closed state when there is paddy in the hopper 3, and the shutter opening/closing detection device 69 is in the closed state when the shutter 5 is open. It is in a closed state. Also, relay R ₂ is the relay
R ₁ , the gap detection device 65, the rice grain detection device 67 in the hopper, and the shutter opening/closing detection device 69 are all in the closed state, and are excited.

The floating derolling and separating device 77 is composed of a paddy detection device 67 in the hopper, a shutter opening/closing detection device 69, a time relay T, and relays R ₁ , R ₃ , and R ₇ . And the above-mentioned relay R ₇
and timed relay T, when relay _R1 is energized,
At least one of the following cases: when the paddy detection device 67 in the hopper detects that there is no paddy in the hopper 3, or when the shutter opening/closing detection device 69 detects that the shutter 5 is closed. It is excited when Also, relay
R ₃ is energized when relays R ₁ and R ₇ are energized and the contact of time relay T is closed. The relay _R7 and the time relay T are energized at the same time, and the contacts of the relay T are opened after a certain period of time has elapsed since the time relay T was energized. Therefore, relay _R7 is energized and the contacts of timed relay T are closed only for a certain period of time after relay _R7 and timed relay T are simultaneously energized. It turns out.

The manual switch gap adjustment device 79 consists of manual switches S ₃ , S ₄ , and S ₅ .
S ₃ is a switch for automatically adjusting the gap between the rolls 9 and 11, but for changing whether to use manual switches S ₃ or S ₅ . and said manual switch S ₃
is connected to the upper terminal in FIG. 4, then relay R ₂ is energized by pressing manual switch S ₄ and relay R ₃ is energized by pressing manual switch S ₅ will be excited.

The servo motor forward/reverse control device 81 is composed of a servo motor 61 and relays R ₂ and R ₃ .
By energizing relay _R2 , servo motor 61 rotates in the forward direction, and by energizing relay _R3 , servo motor 61 rotates in reverse. The rotation of the servo motor 61 is controlled by the adjustment rod 27 via the worm 59, the worm wheel 41, the adjustment handle 49, and the hand holder 39.
The arm 21 is actuated to move the floating derolling 11 and adjust the derolling gap.

Next, the operation of the present invention having the above configuration will be explained.

First, in FIG. 4, relay _R1 is held in an energized state by switching manual switch _S3 to the lower contact and pressing start switch _S1 .
The contacts of the relay R ₁ in the pressure release adjustment device 75 and the floating release roll separation device 77 are held closed. In this state, the paddy detection device 67 in the hopper detects paddy in the hopper 3, and the shutter opening/closing detection device 69 detects that the shutter 5 is in the open state, and If no gap is detected in the locking mechanism 62 of the adjustment rod 27 by the detection device 65, the relay
_R2 is excited and the servo motor 61 rotates in the forward direction. The forward rotation of the servo motor 61 is transmitted to the adjustment rod 27 via the worm 59, worm wheel 41, adjustment handle 49, and hand holder 39, and operates the arm 21 to fix the floating roll release 11. Move it in the direction closer to 9. This operation continues as long as there is a gap between the rolls 9 and 11, and the floating rolls 11 finally come into contact with the fixed rolls 9. Then, in response to this contact pressure, a force is applied to the adjusting rod 27 to the left in FIG. 1 through the threaded portion 25 of the arm 21, and the adjusting rod 27 moves to the left.
A gap will be created in the locking mechanism 62 against the spring 37. When the gap detection device 65 detects this gap and becomes open, relay R ₂ becomes de-energized.
The servo motor 61 is stopped, and at the same time, the operation of the floating roll removal 11 is also stopped, and the operation is automatically adjusted so as not to apply excessive overpressure to the fixed roll release 9.

Furthermore, during the hulling operation, unrolling 9,1
1 is worn, the adjusting rod 27 is adjusted according to the wear.
moves to the right in FIG. 1, so there is no gap in the locking mechanism 62, and the gap detection device
is in the closed state, the servo motor 61 is driven to rotate in the forward direction, and the idle release roll 11 is automatically adjusted until a constant release pressure is reached, similar to the above operation.

On the other hand, during the above-mentioned hulling work or at the end of the hulling work, the paddy detection device 67 in the hopper detects that there is no paddy in the hopper 3, or the shutter 5 is closed. is detected by the shutter opening/closing detection device 69, regardless of the state of the gap detection device 65.
Relay _R2 becomes de-energized. In the floating de-roll separating device 77, the relay R ₇ and the time relay T are energized, so the relay R ₃ is energized for a certain period of time after the relay R ₇ and the time relay T are energized. When the relay R ₃ is excited for a certain period of time, the servo motor 61 is driven to reverse rotation for a certain period of time, and this reverse rotation force is applied to the worm 5.
9. The information is transmitted to the adjustment rod 27 via the adjustment handle 49 etc., and the arm 21 is actuated to move the free roll removal 11 in the direction away from the fixed roll release 9 for a certain period of time, and the release roll 9 is moved away from the fixed roll removal 9. ,1
1 and a certain appropriate gap will be created.

Note that the locking mechanism 62 on which the pressure between the fixed roll releaser 9 and the floating release roll 11 acts is not limited to the above embodiment, but as shown in FIG.
It is also possible to provide it at the connecting portion between the adjustment rod 27 and the arm 21.

In another embodiment shown in FIG. 5, the tip of an arm 210 for operating the floating release roll 11 is rotatably supported at one end of a connecting member 212, and the other end of the connecting member 212 is rotatably supported. A spring adjustment member 214 is screwed together. and,
The center of the spring adjustment member 214 is connected to the adjustment rod 2.
70 is slidably passed through the adjustment rod 27.
A protrusion 272 is provided at one end of the spring adjustment member 214, and a spring 274 is provided as a pressure device between the protrusion 272 and the spring adjustment member 214.
This spring 274 presses the adjustment rod 270 toward the arm 210 via the protrusion 272. In addition, a worm wheel 410 is attached to the other end of the adjustment rod 270.
are screwed together, and this worm wheel 410
is connected to the servo motor 61 via the worm 590.
It is rotated by Further, the worm wheel 410 is rotatably supported by the machine frame 350. Then, the arm 210 and the adjustment rod 270
A gap detection device 65 is provided to detect the gap between the two.

In the above configuration, by rotating the servo motor 61, the adjusting rod 270 is moved left and right through the worm 590 and the worm wheel 410, and the derolling rod 9, 11 is moved through the connecting member 212, the arm 210, etc. Adjust the gap. In addition, at this time, there is no gap between the arm 210 and the adjusting rod 270 until the floating roll removing 11 contacts the fixed rolling removing 9 with a certain pressure, so this gap is detected and the As in the embodiment described above, the derolling pressure of the derolling 9, 11 can always be automatically adjusted to a constant value.

Further, although the spring 37 is provided as a pressurizing device in the locking mechanism 62, a pressurizing device using hydraulic pressure, pneumatic pressure, etc. can also be used, and the present invention is not limited to the above embodiments. Other embodiments are also possible.

In the present invention, as described above, the operation of the floating release roll 11 is controlled by the gap detection device 65 of the locking mechanism 62 so that the floating release roll 11 is always pressed against the fixed release roll 9 with a constant pressure.
The dehulling pressure is always constant regardless of wear of the derolling rolls 9 and 11, stable hulling work is continued, and dehulling efficiency is significantly improved. In addition, the present invention can be implemented by improving the conventional mechanical derolling adjustment device, and furthermore, since it is extremely simple in structure, it has advantages such as being economically superior. .

[Brief explanation of the drawing]

Fig. 1 is an explanatory cross-sectional view of a rice huller embodying the present invention, Fig. 2 is a partially enlarged sectional view of Fig. 1, Fig. 3 is a side view taken in the direction of - arrow in Fig. 2, and Fig. 4 is a FIG. 5, a circuit diagram of the automatic roll release adjustment device, is a cross-sectional explanatory view showing the main parts of another embodiment. Explanation of symbols representing main parts of the drawing, 9...
Fixed unrolling, 11...Floating unrolling, 27
... Adjustment rod, 29 ... Adjustment device, 62 ... Locking mechanism, 65 ... Gap detection device, 75 ... Pressure relief adjustment device.

Claims (1)

[Claims] 1. In an adjusting device 29 equipped with an adjustment rod 27 that presses the fixed roll-off roll 9 and the floating roll-off roll 11, the adjustment rod 27 is provided with a locking mechanism 62 on which the contact pressure between the fixed roll-off roll 9 and the floating roll-off roll 11 acts. , by the gap detection device 65 that detects the gap between the locking member and the non-locking member of the locking mechanism 62,
The floating removing roll 1 is arranged so that the floating removing roll 11 is always pressed against the fixed removing roll 9 with a constant pressure.
1. An automatic de-roll adjustment device for a rice huller, characterized in that it is provided with a de-roll pressure adjustment device 75 for controlling the movement of the rice huller.