JPH0125632Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention is a rice milling machine for polishing grains, and among these, it relates to a circulating rice milling machine.

Conventional technology A conventional circulating rice mill has a resistance rod that can be moved in and out of a vertical milling chamber, and this resistance rod is connected to an adjustment device outside the milling chamber, and the adjustment device is manually operated. The amount of insertion and removal is adjusted.

Problems that the invention aims to solve: In such conventional circulation rice milling machines, the resistance rods are manually inserted and removed, so it is not possible to adjust the resistance value to suit the type or hardness of the grain to be milled. It is difficult and requires considerable skill. In particular, since the polishing pressure changes as the rice milling progresses, it is desirable to accurately move the resistance rod in and out according to this change, but it is extremely difficult to do this manually.

The present invention is to enable a circulating rice mill equipped with a resistance rod to take in and out the resistance rod accurately and automatically according to the grain type, hardness, and progress of milling.

Means for solving the problem Grain feeding roll fixed to one end of the main shaft of the rice milling machine; A collar fitted to the other end of the main shaft so as to be slidable in the axial direction with a keyway and a protrusion; A spiral groove in the collar and a transmission protrusion to enable transmission; a coil spring fitted to the main shaft, one end of which is supported by a fixed spring seat, and the other end of which is always in pressure contact with the collar; capable of interlocking with the collar; This is a circulating rice mill consisting of a resistance rod;

Effect When the pressure inside the vertical milling chamber changes and becomes larger, the torque of the main pulley that rotates the main shaft increases, causing the collar, which is fitted in the protrusion and threaded groove for transmission, to The generated axial thrust pushes against the elasticity of the coil spring and pushes it toward the whitening room. The displacement of the collar at this time is linked to the resistance rod, which is retracted to automatically reduce the pressure inside the milling chamber.

Conversely, when the pressure in the milling chamber decreases, the thrust acting on the collar decreases, and the elasticity of the coil spring pushes the collar toward the opposite side of the milling chamber. The displacement at this time is transmitted to the resistance rod, which is pushed into the whitening chamber to automatically increase the pressure inside the whitening chamber.

Embodiment An embodiment of this invention will be explained based on the attached drawings. In a circulating rice mill in which a protruding resistance rod 3 is provided on a vertical wall 2 of a vertical milling chamber 1 so as to be freely put in and taken out, the main shaft 4 of the rice mill A collar 5 is fitted into the collar 5 so as to slide in the axial direction by the torque of the main shaft 4 and the elasticity of the coil spring 6, and the collar 5 and the protrusion resistance rod 3 are coupled so as to be interlocked. It is.

The vertical milling room 1 has grain feeding rolls 7 below it.
It communicates with a whitening room 9 consisting of a rice bran removal screen 8 and a rice bran removal screen 8, and the upper part communicates with an ascending port 10a of a circulation tank 10.

Further, the drop port 10b of the circulation tank 10 is communicated with the supply port 11 of the grain feeding roll 7, and the brown rice in the circulation tank 10 is transferred from the supply port 11 into the grain feeding roll 7 by the rotation of the grain feeding roll 7. It is fed, milled in the milling chamber 9 to vertical milling chamber 1, and returned to the circulation tank 10. At this point, it flows in the direction of arrow A and reaches the drop port 10b again.

During this period, the milling pressure in the vertical milling chamber 1 and the milling chamber 9 communicating therewith changes depending on the length L of the resistance rod 3 in the vertical milling chamber 1, and at the same time, the milling pressure in the milling chamber 9 communicating therewith changes. The torque acting on changes.
The grain feed roll 7 is directly connected to one end of the main shaft 4 described above, supports one end of the main shaft 4 with a bearing, and fixes a fixed spring seat 14 to this part.

A cylindrical collar 5 is fitted to the other end of the main shaft 4 so as to be slidable in the axial direction. That is, a pair of protrusions 15 formed on both sides of the other end of the main shaft 4, and a collar 5.
It is slidably fitted into an axial keyway 17 bored into the inner surface of the shaft.

Also, the main pulley 18 is loosely fitted on the outside of the collar 5,
A transmission protrusion 20 that can protrude onto the inner circumferential surface of the main pulley 18 is slidably fitted into a spiral groove 19 formed on the outer circumferential surface of the collar 5.

Furthermore, a sliding spring seat 2 is provided on the whitening chamber 9 side of the collar 5.
1 is fixed, its sliding spring seat 21 is slidably fitted onto the main shaft 4, and the coil spring 6 is interposed between the sliding spring seat 21 and the above-mentioned fixed spring seat 14, and the collar 5 is fixed. It is always pressed against the stopper 23 at the free end of the main shaft 4.

Further, an arm 25 is fixed to a part of the outer periphery of the collar 5 via a bearing 24, and this arm 25 and the above-mentioned resistance rod 3 are connected to a swinging rod 27 which is pivoted by a support shaft 26, and a connecting rod 28. , 29 to connect them in an interlocking manner.

With the load on the grain feeding roll 7, the main pulley 18 is moved by the motor 30 and the belt 31 in the direction of arrow A18.
When the main pulley 18 rotates in the direction, the transmission protrusion 20 protruding from the inner surface of the main pulley 18 pushes the slope of the spiral groove 19 in the direction of arrow A20. At this time, an axial thrust F is generated in the collar 3 due to the action of the slope of the spiral groove 19, which is moved in the axial direction by the engagement of the keyway 17 and the protrusion 15, and the coil spring 6 is moved into the polishing chamber 9. Compress towards the sides.

When the coil spring 6 is compressed and its elasticity is balanced with the thrust F and is no longer compressed, the collar 5 rotates together with the main pulley 18 and engages the keyway 17 and the protrusion 15. spindle 4
is rotated, the grain feed roll 7 is rotated, and the milling work is performed.

At this time, when the load inside the milling chamber 9 changes and becomes larger, the torque of the main pulley 18 that rotates the main shaft 4 increases, so the thrust force F also increases, compressing the coil spring 6 until it balances its elasticity. do.

At this time, the arm 25 fixed to a part of the outer circumference of the collar 5 moves in the direction of arrow A25 together with the collar 5, and swings the swinging rod 27 clockwise with the connecting rod 28.
The other connecting rod 29 moves the resistance rod 3 in a direction that allows it to be withdrawn from the vertical milling chamber 1, thereby reducing the pressure inside the milling chamber 1.

Contrary to the above, when the pressure inside the whitening chamber 1 becomes too low, the torque acting on the main pulley 18 decreases and the thrust force F also decreases, so the elasticity of the coil spring 6 becomes stronger and the collar 5 is Move in the opposite direction as above.

At this time, the arm 25 fixed to the collar 5 moves in the opposite direction to the arrow A25, and projects the resistance rod 3 into the vertical whitening chamber 1 via the connecting rod 28, the swinging rod 27, and the other connecting rods 29. This increases the polishing pressure in this area.

In this way, the whitening pressure is automatically maintained at an appropriate level at all times.

Effects of the invention Since the circulating rice milling machine according to this invention is constructed as described above, when the pressure in the vertical milling chamber changes and the torque of the main pulley changes, the transmission protrusion moves axially toward the collar due to the action of the slope of the spiral groove. generates thrust.

When the collar moves in the axial direction due to the engagement between the keyway and the protrusion, the coil spring expands and contracts, but this spring is fitted onto the main shaft, one end of which is supported by a fixed spring seat, and Since the other end is always pressed against the collar, the expansion and contraction force of the spring is not affected by centrifugal force even when the main shaft rotates.

Therefore, since the amount of movement of the collar in the axial direction is determined only by the elastic force of the spring and the torque of the main pulley, changes in the torque of the main pulley can be accurately reflected in the sliding movement of the resistance rod. I can do it. Therefore, the amount of protrusion of the resistance rod can be adjusted appropriately.

That is, the resistance rod can be automatically adjusted according to the type and hardness of the grain to be milled or the milling process.

Moreover, by setting the elasticity of the spring to the best condition at that time, the appropriate polishing pressure that matches the characteristics of brown rice can be obtained, and unlike conventional rice milling machines of this type, it is possible to use it with experience and feeling. No driving operation required.

[Brief explanation of the drawing]

Figure 1 is a vertical cross-sectional view of the proposed circulating rice mill, Figure 2
The figure is an enlarged detailed view of the main part, and FIG. 3 is a sectional view taken along the line -- in FIG. 2. 1... Vertical confirmation room, 3... Resistance rod, 4... Main shaft, 5... Collar, 6... Coil spring, 7... Grain feeding roll, 9... Milling room, 10... Circulation tank,
15... Protrusion, 17... Keyway, 18... Main pulley, 19... Spiral groove, 20... Transmission protrusion, 27...
...Swinging rod, 28...Continuous rod, 29...Continuous rod.

Claims (1)

[Scope of utility model registration request] Grain feeding roll fixed to one end of the main shaft of the rice milling machine; A collar fitted to the other end of the main shaft so that it can slide in the axial direction using a keyway and a protrusion; Transmission is possible using a spiral groove and a transmission protrusion on the collar. A circulation consisting of a fitted main pulley; a coil spring fitted to the main shaft, one end of which is supported by a fixed spring seat, and the other end of which is always in pressure contact with the collar; a resistance rod that can be interlocked with the collar; Type rice polishing machine.