JPH07835A - Starting device for direct motor-connected single pass rice polisher - Google Patents

Abstract

PURPOSE:To ensure that a rice polisher can be restarted easily by providing a motor drive shaft at an adjacent position to a rise polisher shaft on a single axis. CONSTITUTION:A rice polisher shaft 2 is junctioned to the drive shaft 1 of a drive motor 9 through a coil spring 4, and a hull feed roll 10 and a rice polishing roll are fixed on the tip of the shaft 2. The power transmission section is composed of the hollow part 3 of the rice polisher shaft 2 introduced into the extension part 1a of the drive shaft 1 on a motor 9 as far as the part 3 becomes fully connected to a collar 13, and the coil spring 4 introduced into the outer diameter D of the rice polisher shaft 2. Thus, if the rice polisher is stopped during rice polishing operation, the drive shaft 1 of the motor 9 rotates backward as the coil spring 4 is engaged with the outer diameter D of the polisher shaft 2 with some play of action. When restarting the rice polisher, the rotating force of the drive shaft 1 on the motor 9 is not immediately transmitted to the shaft 2, but the coil spring 4 begins to clamp the shaft 2 with a concurrent action of elastic deformation. Thereafter, the rotating force is instantaneously transmitted to the rice polisher shaft 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a starter for a single-motor, single-pass type rice milling machine.

[0002]

2. Description of the Related Art In a single-motor type, single-pass type rice milling machine, the motor drive shaft and the rice milling machine shaft are directly connected. Therefore, the driving force of the motor is directly transmitted to the milling machine shaft without passing through the driving belt.

[0003]

In the conventional single-pass type single-rice milling machine directly connected to the motor, if the power is cut off during milling, the operation is stopped with the rice grains clogged in the milling room. The whitening roller does not rotate without a large starting force.

Therefore, although a motor having a larger output than necessary is set as the motor or a special motor having a strong starting torque is used, the equipment cost becomes high and the cost is wasteful.

Therefore, it is conceivable to reverse the axis of the rice milling machine before restarting to loosen the jammed state of the rice in the milling chamber, and then start the machine like a rice milling machine equipped with a drive belt. However, it is difficult to manually reverse the whitening roll in the rice mill without the drive belt.

Therefore, it is necessary to disassemble the polishing chamber to loosen the clogging of rice in the polishing chamber, assemble the polishing chamber again, and then restart it. Such a restart method imposes a heavy burden on time and cost.

The present invention has been made in view of the above circumstances, and an object thereof is to enable a simple restart.

[0008]

According to the present invention, a drive shaft of a motor and a rice milling machine shaft are provided adjacent to each other on the same shaft center, and a coil spring is loosely fitted to the outer diameter of the shaft. It is an object of the present invention to achieve the above-mentioned object by a starter for a single-pass type single-rice milling machine directly connected to a motor, wherein one end is fixed to the drive shaft of the motor and the other end is fixed to the shaft of the rice milling machine.

[0009]

[Function] When the power is turned on and the drive shaft of the motor is rotated,
While the coil spring elastically deforms, after tightening the rice-polishing machine shaft, the driving force of the drive shaft is rapidly transmitted to the rice-polishing machine shaft to instantly rotate the rice-polishing roll.

If the power is turned off during the milling, the rotation of the milling machine shaft will be stopped instantaneously, and it will be difficult for the milled roll to rotate due to the resistance of the rice grains in the milling chamber. At this time, the elastic force of the coil spring works and the coil spring returns to the original state, and accordingly, the drive shaft of the motor rotates in the reverse direction.

When the power is turned on and the system is restarted in this state,
The drive shaft of the motor rotates and elastically deforms the coil spring, tightening the rice milling machine shaft. Then, when the tightening of the coil spring is completed, the rotational force of the drive shaft is instantaneously transmitted to the rice milling machine shaft via the coil spring, so that the whitening roll rapidly rotates with a large force.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to the accompanying drawings. As shown in FIG. 1, in a motor direct-connection type single-pass type rice milling machine, a rice milling machine shaft 2 is joined to a drive shaft 1 of a drive motor 9 via a coil spring 4, and a grain-feeding roll 10 is provided at the tip thereof.
The whitening roll 11 is fixed, and a bran wire net 12 is provided on the outer periphery of the whitening roll 11 to form a whitening chamber S.

The transmitting portion has a structure as shown in FIGS. The drive shaft 1 of the motor 9 is extended, a collar 13 having the same outer diameter D as the outer diameter D of the rice milling machine shaft 2 is fitted into the extension portion 1a, and the drive shaft 1 of the motor 9 is penetrated through the collar 13.
Is provided with a screw hole 14 in a right angle direction. At the rear end 2a of the rice polishing machine shaft 2, a hollow portion 3 is formed by drilling a hole of a certain depth in the axial direction, and a screw hole 15 perpendicular to the rice polishing machine shaft 2 is formed at the end portion 2c of the hole of the hollow portion 3. Set up.

The hollow portion 3 of the rice milling machine shaft 2 is inserted into the extension portion 1a of the drive shaft 1 of the motor 9 and fitted into the collar 13 until it is completely joined, and the coil spring 4 is inserted into the outer diameter D of the rice milling machine shaft 2. . As shown by the chain line in FIG. 4, the coil spring 4 has an inner diameter L larger than the outer diameter D of the rice milling machine shaft 2, so that there is a gap between the rice milling machine shaft 2 and the coil spring 4. Has occurred.

The screw direction of the coil spring 4 is arranged in the same direction as the drive shaft 1 of the motor 9. A screw 6 is passed through a ring 5 formed at the end of the coiling machine 4 on the side of the rice milling machine, and tightened in a screw hole 15 of the shaft 2 of the rice polishing machine to fix one end of the coiling spring 4 to the shaft 2 of the rice polishing machine.

A collar 8 is passed through a ring 7 formed at the end of the coil spring 4 on the side of the motor 9 through a screw 8 and tightened in a screw hole 14 of the motor drive shaft 1. 9 is fixed to the drive shaft 4.

At the lower part of the brown rice tank 16, the grain transfer roll 1
A cylindrical body 17 to which 0 is attached is fixed, and a ball bearing 18 supporting the rice milling machine shaft 2 is attached to the cylindrical body 17.
And the oil seal 19 is set. Therefore, the shaft of the rice polishing machine shaft 2 is maintained by the fitting portion of the motor 9 with the drive shaft 1 of the motor 9 and the support of the ball bearing 18.

Next, the operation of this embodiment will be described.
When the drive shaft 1 of the motor 9 rotates to the left when viewed from the motor side, as shown in FIG.
And the coil spring 4 is tightened in the direction of arrow A1.

Then, the coil spring 4 changes from the state shown by the chain line in FIG. 4 to the state shown by the solid line, so that the coil spring 4 is gradually narrowed toward the screw 6 to the outer diameter D of the milling machine shaft 2. While being tightly wound, the turning force in the direction of arrow A2 is transmitted to the screw 6 screwed to the rice polishing machine shaft 2. Therefore, when the motor 9 is started and a sufficient rotational force is applied, the rotational force is rapidly transmitted from the rice milling machine shaft 2. Then, the milling machine shaft 2 and the whitening roll 11 rotate counterclockwise to perform whitening work.

When the motor 9 is stopped while the rice grains R are filled in the polishing chamber S during the polishing process, the rice polishing machine shaft 2 is instantaneously stopped by the resistance of the polishing chamber S and the coil spring 4 is squeezed to the maximum extent. Since the rotational force from the motor 9 becomes zero, the elastic force of the coil spring 4 is transmitted to the drive shaft 1 of the motor, and the rotor of the motor 1 is rotated rightward about 90 to 120 degrees and stopped. At this time, the coil spring 4 wound around the rice milling machine shaft 2 returns to its original state due to the elastic force.
A gap is created between the rice polishing machine shaft 2 and the coil spring 4.

At the next restart (restart), the motor 9
The rotor is rotated by 90 degrees to 120 degrees in the direction opposite to the arrow A1 and stopped. When a current flows through the motor 9 and the rotor starts rotating in the direction of arrow A1, the coil spring 4 is allowed to have a sufficient rotational force without being affected by the resistance of the rice milling machine shaft 2 at 90 to 120 degrees. The rotational force is transmitted to the rice milling machine shaft 2 via the. Therefore, when the grain in the polishing chamber S is full, the operation can be restarted.

In the figure, W indicates white rice discharged from the polishing chamber S, and K indicates rice bran falling from the polishing chamber S.

A second embodiment of the present invention will be described with reference to FIGS. The difference between this embodiment and the first embodiment is that the drive shaft 1 of the motor and the shaft 2 of the rice milling machine are engaged with each other via the engagement / disengagement means, and the rotational force is directly transmitted from the drive shaft of the motor to the shaft of the rice milling machine. Is Rukoto.

That is, the drive shaft 1 of the motor 9 and the rice milling machine shaft 2 are positioned on the same axis, and the spacer 20 is fitted to the extension 1a of the drive shaft 1 and the screw 21 is fixed. The tip of the spacer 20 is separated from the tip 1f of the extension of the drive shaft 1, and a projection 25 is provided on the tip. The protrusion 25 is formed in an arc shape, and its central angle is, for example, 3
Although it is 0 degree, it is not necessarily required to be arcuate.

In the hollow portion 3 of the rear end portion 2a of the rice polishing machine shaft 2,
The extension portion 1a of the drive shaft is loosely fitted, and a semicircular arc-shaped cutout portion 27 is formed at the tip of the hollow portion 3.

Coil springs (driving springs) are provided on both shafts 1 and 2.
4 is fitted, one end of this spring 4 is fixed to the rice milling machine shaft 2 with a screw 28, and the other end is fixed to the spacer 20 with the screw 2.
9 has been stopped.

In this embodiment, when the drive shaft 1 of the motor 9 rotates in the direction of arrow A9 (normal rotation), the coil spring 4 is narrowed and both shafts 1 and 2 are tightened. Immediately before being transmitted to the machine shaft 2, the projection 25 of the spacer 20 engages with the notch 27 of the rice milling machine shaft 2 to be integrated. And
In this state, power is transmitted and the rice polishing machine shaft 2 also rotates in the direction of arrow A9. That is, at this stage, the rotational force of the drive shaft 1 is directly transmitted to the rice milling machine shaft 2, so that the coil spring 4 is not subjected to a force greater than a predetermined value.

When the motor 9 is stopped and the rice milling machine shaft 2 is locked, the restoring force of the coil spring 4 acts and the drive shaft 1 moves in the direction of arrow A.
Rotate (reverse) in the direction opposite to 9 direction. Therefore, when a current flows through the motor 9 and starts to rotate, the cutout 27 and the projection 25 are engaged with each other after the resistance of the rice milling machine shaft 2 is not received within the range of the predetermined rotation angle and the rotation force has a sufficient margin. And become one. As a result, the rotational force of the drive shaft 1 is directly transmitted to the rice polishing machine shaft 2. Therefore, no force exceeding a predetermined value is applied to the coil spring 4, so that the coil spring 4 can be completely prevented from being damaged.

The embodiment of the present invention is not limited to the above. For example, instead of rotatably fitting the extension portion 1a of the drive shaft 1 of the motor 9 into the hollow portion 3 of the rice polishing machine shaft 2,
The shafts 1 and 2 may be adjacent to each other on the same axis without providing the extension portion 1a and the hollow portion 3. In this case, the coil spring 4 is fitted only to the rice milling machine shaft 2 and one end thereof is fixed to the shaft 2 and the other end thereof is fixed to the drive shaft 1, or, conversely, the coil spring 4
Is fitted only to the drive shaft 1, one end of which is fixed to the shaft 1 and the other end is fixed to the rice milling machine shaft 2, and further, the coil spring 4
It is needless to say that the shafts 1 and 2 may be stretched at the same time and the ends thereof may be fixed to the shafts 1 and 2, respectively.

[0030]

According to the present invention, since the coil spring is loosely fitted to the outer diameter of the shaft, when the operation is stopped during rice polishing, the elastic force of the coil spring causes the motor drive shaft to rotate in the reverse direction. . Then, at the time of restart, the rotational force of the drive shaft of the motor is not immediately transmitted to the rice milling machine shaft, but first, the coil spring is elastically deformed to clamp the rice milling machine shaft, and then is instantaneously transmitted to the rice milling machine shaft. .

That is, when the motor is started and a sufficient rotation force is obtained, the rotation force is rapidly transmitted to the axis of the rice milling machine, so that the rice mill in a rice jam condition can be easily restarted. Therefore, unlike the conventional example, the present invention can be restarted without disassembling the polishing chamber or using a motor having a larger capacity than necessary.

Further, since the hollow portion is formed in either the drive shaft of the motor or the rice milling machine shaft and the other shaft is loosely fitted in the hollow portion, the free displacement of both shafts is regulated. It Therefore, the two shafts always maintain the same axial center, so that the rotational force can be efficiently transmitted.

Further, the both shafts are provided with engaging / disengaging means which are engaged at the time of normal rotation of the motor and released at the time of reverse rotation, and the both shafts are connected by the drive spring for urging in the releasing direction. The rotational force of the drive shaft is directly transmitted to the shaft of the rice milling machine, and the drive spring is not subjected to a force greater than a predetermined value. Therefore, it is possible to completely prevent damage accidents of the spring.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a first embodiment of the present invention.

FIG. 2 is a front view showing the coil spring of FIG.

FIG. 3 is an enlarged view of a main part of FIG.

FIG. 4 is an enlarged view of a main part of FIG.

FIG. 5 is a perspective view showing a second embodiment of the present invention.

FIG. 6 is a perspective view showing another state of the second embodiment of the present invention.

[Explanation of symbols]

 1 Motor drive shaft 2 Rice milling machine shaft 4 Coil spring

Claims (11)

[Claims] 1. A motor drive shaft and a rice milling machine shaft are provided adjacent to each other on the same shaft center, and a coil spring is loosely fitted to the outer diameter of the shaft.
One end of the coil spring is fixed to the drive shaft of the motor, and the other end is fixed to the shaft of the rice milling machine. 2. The motor according to claim 1, wherein a hollow portion is formed at an end portion of one of the drive shaft of the motor and the rice milling machine shaft, and the other shaft is loosely fitted in the hollow portion. Start-up device for direct-connection, single-pass type rice milling machine 3. A starter for a single-motor, single-pass type rice milling machine according to claim 1 or 2, wherein the coil spring is loosely fitted to the shaft of the rice milling machine. 4. A starting device for a motor direct-connection type single-pass type rice milling machine according to claim 1 or 2, wherein the coil spring is loosely fitted to the drive shaft of the motor. 5. A starter for a single-motor, single-pass type rice milling machine according to claim 1, wherein the coil spring is loosely fitted to the rice milling machine shaft and the motor drive shaft. 6. A starter for a motor direct connection type single-pass type rice milling machine according to claim 1, wherein the motor drive shaft is provided with an extension having a diameter smaller than that of the rice milling machine shaft. 7. A starter for a motor direct-connection type single-pass type rice milling machine according to claim 6, wherein a collar having the same diameter as the rice milling machine shaft is fitted to the extension of the drive shaft of the motor. 8. A motor drive shaft and a rice milling machine shaft are provided adjacent to each other on the same shaft center, and both shafts are provided with engagement / disengagement means which is engaged during normal rotation of the motor and released during reverse rotation. A starter for a single-motor type, single-pass type rice milling machine, characterized in that both shafts are connected by a drive spring that biases them in the releasing direction. 9. A motor drive shaft and a rice milling machine shaft are provided adjacent to each other on the same shaft center, and a coil spring is loosely fitted to the outer diameter of the shaft,
One end of the coil spring is fixed to the drive shaft of the motor, the other end is fixed to the shaft of the rice milling machine, and engaging / disengaging means is engaged with the ends of the both shafts by the normal rotation of the motor and released by the reverse rotation. A starter for a single-pass type single-rice milling machine directly connected to the motor 10. A starter for a motor direct-connection type single-pass type rice milling machine according to claim 9, wherein an extension of the drive shaft of the motor is loosely fitted in the hollow portion of the rice milling machine shaft. 11. The motor direct connection type once as set forth in claim 8, wherein the engaging / disengaging means comprises a protrusion provided on the drive shaft of the motor and a notch in the hollow portion of the rice milling machine shaft. Starting device for through rice mill