JPS6236515Y2 - - Google Patents

Description

[Detailed description of the invention] This invention automatically maintains the roll gap of a double-roll type huller that automatically adjusts the roll gap of a double-roll type huller with both of the pair of rolls being moving rolls during de-work. Regarding equipment.

In a so-called multi-roll type huller that performs shedding by applying a circumferential speed difference between a pair of rolls, it is necessary to maintain the roll gap at an optimal interval at all times in order to maintain the best shedding ability. However, since the surface of the roll is made of an elastic material such as rubber, the surface is subject to wear due to removal of work, and the distance between the rolls increases as the roll is used. Therefore, the following measures have been conventionally taken to maintain the roll gap constant.

(1) A method in which the unrolling is continuously pressed with a constant pressure.

(2) A method in which the unrolled rollers are brought into contact once, the zero point is confirmed, and the rollers are moved back a certain distance from that zero point to obtain the predetermined roll gap.

However, in the above-mentioned method (1), since there is a peripheral speed difference between both rolls, bringing the rolls into contact during operation may cause damage accidents such as motor overload and damage to the roll surface. In order to prevent this drawback, if the rotational drive of the rolls is started and stopped while the rice grains are flowing into the roll contact portion, there is a problem that rice is left undehulled before and after shedding begins and ends.

In addition, the method (2) has the disadvantage that the roll gap cannot be automatically adjusted to an appropriate value during decapping.

Furthermore, because conventional multi-roll type rice hullers had moving rolls and fixed rolls, it was necessary to manufacture a wide variety of parts with different specifications in small quantities, increasing manufacturing costs and requiring a large number of repair parts to be stored. It had the disadvantage of becoming.

Therefore, the object of this invention is to realize an automatic roll gap adjustment device for a multi-roll type huller consisting of two moving rolls, which can automatically adjust the roll gap to an appropriate value even during de-work.

Embodiments of this invention will be described in detail and specifically below based on the drawings.

1 and 2 show a first embodiment of this invention. In FIG. 1, a double-roll type huller 1 is provided with a chamber removal 2, and a first moving roll is installed in the chamber removal 2. 3 and a second moving roll 4 are provided facing each other, and the paddy thrown in from the hopper 6 is removed by the difference in circumferential speed between the two rolls 3 and 4 at the rolling contact portion. In order to maintain the gap between the roll contacting and rolling portions 5 of both the rolls 3 and 4 at a distance necessary for complete release, the following configuration is made.

The first moving roll 3 is supported by a first support frame 7, and one end of the first support frame 7 is pivotally supported to the machine base by a pin 8. A female screw pin 9 having a female screw is provided at the other end of the support frame 7, a screw rod 10 made of a ball screw or the like is screwed into the female screw pin 9, and a reducer 11 and a motor 12 are attached to the rear end of the screw rod 10. The fine adjustment mechanism 13 is constructed so that fine adjustment can be achieved by driving a motor. Note that a reduction geared motor may be used instead of the reduction gear 11 and the motor 12.

Further, like the first moving roll 3, the second moving roll 4 is also supported by a second support frame 14, one end of the second support frame 14 is pivotally supported on the machine base by a pin 15, and the other end is supported by a second support frame 14. A rod 17 such as a reciprocating air cylinder 16 is pivotally attached to the rod 17, and a locking mechanism 18 is provided on the rod 17 to complete a pressing mechanism 19. Note that the reference numeral 20 is a paddy detection sensor that detects the presence or absence of paddy in the hopper 6.

Next, the effect will be explained.

First, both rolls 3 and 4 are stopped, the motor 12 of the fine adjustment mechanism 13 is operated, the speed is reduced to a predetermined speed by the reducer 11, the screw rod 10 is rotated, and the first moving roll 3 is moved forward once. Now, make sure you have enough room for backing up to obtain the roll spacing. Next, the locking mechanism 18 holding the rod 17 of the pressing mechanism 19 is released, compressed air is supplied to the air cylinder 16, and the rod 17 is pushed forward. As a result, the second moving roll 4 is moved forward, and the first moving roll 3 and the second moving roll 4 are brought into contact with each other at the roll contact portion 5 . Then, the cylinder 16 is stopped from being pushed forward, and the lock mechanism 18 is activated to hold and fix the rod 17. Next, in order to obtain a predetermined roll gap, the motor 12 of the fine movement adjustment mechanism 13 is reversely rotated to move the first moving roll 3 backward by the required roll gap. With this operation,
Since we were able to obtain the optimum roll gap for dehulling, we started driving both rolls 3 and 4, and after confirming that there was paddy in the hopper 6 using the paddy detection sensor 20, we started the shutter of the hopper 6 (not shown). ) is opened, the paddy is supplied to the roll contact portion 5 of the rotating rolls 3 and 4, and unloading is started.

Next, in order to automatically maintain the appropriate roll gap even after a predetermined period of time has elapsed, the air cylinder 1 is
At the same time, the lock mechanism 18 is released. As a result, the second moving roll 4 is constantly pushed in the direction of the first moving roll 3 with a constant pressure. Even if the second moving roll 4 is pressed in this manner, there is no problem that the roll gap becomes narrow because the rice grains are present in the roll contact portion 5.

Even if the rolls are worn out due to long-term work, the second moving roll 4 is automatically moved in the direction of the first moving roll 3 at any time due to the function of this pressing mechanism 19, and the gap between the rolls is expanded beyond the proper distance. This prevents this from occurring and maintains an appropriate roll spacing.

Next, when the amount of paddy in the hopper 6 decreases, the paddy detection sensor 20 detects that there is no more paddy at the position of the paddy detection sensor 20. This detection signal is received by appropriate means, and the rod 17 is immediately locked by the locking mechanism 18. As a result, the pressing of the second moving roll 4 is stopped, and the automatic gap adjustment operation is stopped. However, since the appropriate roll gap can be maintained for a considerable period of time, there is no problem in continuing good dehulling, and the dehulling can be continued until the hopper 6 is empty of paddy. Even if there is no paddy at all, there is a gap between the rolls 3 and 4, so there is no possibility that the two rolls, which have different circumferential speeds, will cause undesirable friction.

Note that this invention is not limited to the above-mentioned embodiments, and can be modified in various ways without departing from the spirit of this invention.

For example, in the above embodiment, the first moving roll 3 was provided with the fine adjustment mechanism 13, and the second moving roll 4 was provided with the pressing mechanism 19, but the pressing mechanism 19 was provided on the first moving roll 3 and the pressing mechanism 19 was provided on the second moving roll 4, respectively. Of course, a configuration in which the fine movement adjustment mechanism 13 is provided on the two moving rolls 4 may also be used.

Further, as the pressing mechanism 19, as shown in FIG.
Instead of the air cylinder 16 of the above-described embodiment, a spring 31 may be used to perform the pressing. That is, a spring 31 is contracted behind the rod 17, and an adjustment screw 32 is provided at the further rear end of the spring 31. Also, a rack 33 is used as a mechanism for retracting the rod 17.
The motor 35 engages the pinion 34 and drives the motor 35.

Accordingly, with the above-described structure, since the pressing force can be obtained by the spring, the air compressor can be omitted and the structure can be simplified, the manufacturing cost is low, and the handling is easy.

Alternatively, the fine movement adjustment mechanism 13 may be used, for example, by providing a driven body that contacts a linearly moving cam via a rotor, and connecting a moving roll to the tip of the driven body to obtain a predetermined roll gap. It can also be configured as However, by doing so, the configuration can be simplified.

As is clear from the above detailed explanation, according to this invention, the roll gap of the multi-roll type huller can be automatically maintained at an appropriate interval, so that the rice can always be removed in the best condition. This has the effect of preventing the occurrence of rice that has not been removed.

Moreover, in this invention, both of the pair of rolls are moving rolls, so when manufacturing roll bearing mechanisms etc., as in the past, the component parts for the fixed roll and the component parts for the moving roll have different standards. There is no need to go through the uneconomical process of manufacturing a wide variety of products in small quantities, and it is now possible to manufacture products of the same standard in small quantities in small quantities, making manufacturing easier, reducing costs, and improving compatibility. This has the effect of requiring fewer repair parts to be stored.

[Brief explanation of the drawing]

Figure 1 is a side view of a multi-roll type huller. FIG. 2 is an enlarged view showing the automatic roll gap adjustment device. FIG. 3 is a sectional view of a main part of an automatic roll gap adjustment device showing another embodiment of the present invention. In the figure, 3 is a first moving roll, 4 is a second moving roll, 13 is a fine adjustment mechanism, 18 is a locking mechanism, and 19 is a pressing mechanism.

Claims (1)

[Scope of utility model registration request] Each of a pair of rolls provided facing each other in a multi-roll type huller is a moving roll, the first moving roll is provided with a fine adjustment mechanism, and the second moving roll is provided with a pressing mechanism having a locking mechanism. An automatic roll gap maintenance device for a multi-roll type rice huller featuring: