JPH0815566B2 - Rice milling machine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a rice milling machine for treating brown rice into polished rice.

2. Description of the Related Art Conventional rice milling machines generally have a structure as shown in FIG. 5, for example. In FIG. 5, the feed roll 52 and the whitening roll 53 are arranged inside the whitening cylinder 51.
A restriction plate 55 for restricting the cross-sectional area of the passage is provided at the outlet 54, and is biased by a spring 56 in a direction to close the outlet 54, so that the accuracy of the hammering is kept constant.

When the feed roll 52 and the whitening roll 53 are rotationally driven by the motor 57 and the brown rice is put into the whitening cylinder 51 from the upper part, the brown rice is pushed toward the regulation plate 55 by the feed roll 52 and the whitening cylinder 51
The rice is processed between the net 58 inside and the rotating whitening roll 53, and the polished rice is discharged from the outlet 54. Here, when the biasing force of the spring 56 is increased, the internal pressure of the white polishing cylinder 51 is increased to increase the bowling accuracy, and when the biasing force is decreased, the internal pressure is reduced to decrease the bowling accuracy.

The problem to be solved by the invention is that, in the above-mentioned configuration, the restriction plate 55 is provided at the outlet 54.
Since it is pressed from the outside by a spring 56, the outlet 54
The spring 56 for adjusting the opening degree of is located on the side where white rice is discharged, and therefore, when the polished white cylinder 51 is arranged vertically, the urging force of the spring 56 is affected by the flow of the discharged white rice,
There is a problem that proper opening adjustment may not be possible.

Therefore, an opening adjustment shaft that penetrates the shaft center positions of the whitening roll 53 and the feed roll 52 is provided, and a regulating plate 55 is connected to one end of the whitening roll 53 and the other end of the opening adjustment shaft is projected from the whitening cylinder 51 to open it. An engaging member is provided at the other end of the degree adjusting shaft, a spring is interposed between the engaging member and the moving member fitted to the opening adjusting shaft, and the position of the moving member is adjusted by the drive means so that the spring is attached. It is conceivable that the power is adjusted.

However, with such a configuration, when an external force such as a frictional force acts on the opening adjustment shaft, a force other than the internal pressure of the whitening cylinder 51 acts on the regulation plate 55, and the opening cannot be adjusted appropriately. If the parallelism between the axis of the opening adjusting shaft and the driving direction of the driving means of the moving member is low, a frictional force is generated on the opening adjusting shaft as the moving member moves, which adversely affects the opening adjustment. Will be given. However, in order to increase the degree of parallelism between the axis of the opening adjusting shaft and the driving means, there is a problem that the adjusting work requires time and the rigidity of the opening adjusting shaft must be increased.

An object of the present invention is to provide a rice milling machine in which external force does not act on the opening adjustment shaft without complicated adjustment work, and the opening of the white rice outlet is always adjusted properly. Is.

Means for Solving the Problems The rice milling machine of the present invention moves the opening degree of the white rice outlet provided at one end of the whitening tube portion provided with a rice polishing roll along the axial direction in the axial direction of the whitening tube portion. The opening adjustment member is provided with an opening adjustment member that is connected to one end of the opening adjustment shaft. A spring is interposed between a moving member that is rotatably fitted at a position at a proper distance from the other end of the And its driving means are swingable about a first vertical axis perpendicular to the axis of the opening adjusting shaft via a connecting bracket, and the axis of the opening adjusting shaft and the first vertical axis. It is characterized in that it is connected so as to be capable of relative movement along a second vertical axis that is perpendicular to and to be swingable around the axis.

According to this structure, the moving member is connected to the drive means via the connecting bracket so that the relative distance between the moving member and the drive member can be varied, and the moving member can swing in two directions perpendicular to the axis of the opening adjustment shaft. Even if the moving direction of the driving means and the axis of the opening adjusting shaft are not adjusted in parallel with high accuracy, the moving member can move relatively along the opening adjusting shaft without applying external force to the opening adjusting shaft. Therefore, the opening degree regulating member and the opening degree adjusting shaft are always accurately moved according to the fluctuation of the internal pressure of the whitening cylinder portion to adjust the opening degree.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

In FIG. 1, reference numeral 1 denotes a main body casing, which is configured by sequentially fitting and connecting an upper casing 2, a whitening tube portion 3, an intermediate casing 4 and a lower bearing casing 5 from the upper part to the lower part, and mutually fitting and connecting them. Are configured so that their axes coincide with each other. Upper casing 2
A screw feeder 6 that supplies brown rice to an opening formed on one side of the upper part of the is connected. 7 is a hopper for charging the brown rice, and 8 is a drive motor.

Reference numeral 9 is a rotary shaft composed of a hollow shaft disposed at the axial center position over the upper casing 2, the whitening cylindrical portion 3 and the intermediate casing 4, and the feed roll 10 is substantially whitened correspondingly in the upper casing 2. The whitening roll 11 is fitted and mounted so as to substantially correspond to the tubular portion 3. These feed rolls 10
The polishing roll 11 and the polishing roll 11 are coupled to each other by a coupling pin 12, and a position near the lower end of the polishing roll 11 is circumferentially engaged with the rotating shaft 9 by a key 13. In addition, a cylindrical recess 14 is formed at the lower end of the whitening roll 11, and a fitting cylinder 16 extending above the opening control member 15 is vertically slidably fitted therein. The outer peripheral surface of the opening degree regulation member 15 is formed as a cylindrical surface having an appropriate width in the vertical direction. In addition, the fitting cylindrical portion 16 has an inner peripheral surface that is tapered downward so that the upper end thereof has a pointed shape, and a space is formed between the inner peripheral surface and the outer peripheral surface of the rotating shaft 9. The bran adhering to the peripheral surface of the cylindrical recess 14 at the lower end of 11 is dropped, and the bottom surface of the cylindrical recess 14 and the fitting cylinder 16
It is configured so that the bran does not get caught between the upper end and the upper end of the. A net 17 is disposed inside the polishing unit 3 at an appropriate interval with respect to the outer periphery of the polishing roll 11, and an outlet 18 for the bran generated during rice polishing is provided on one side of the lower periphery of the polishing unit 3. It is open. Further, a white rice outlet forming member 19 is arranged between the lower end of the white polishing cylinder portion 3 and the upper end of the intermediate casing 4. The inner periphery of the white rice outlet forming member 19 is formed as a sharp edge, and is fitted to the outer peripheral surface of the opening regulating member 15 having a suitable width in the vertical direction.

A white rice discharge port 20 is formed on one side of the upper end portion of the intermediate casing 4, and a chute 21 is attached thereto. Further, the rotating shaft 9 is provided with a flange 22 for receiving the white rice dropped from the white rice outlet forming member 19 and guiding it to the chute 21. A support shaft 23 rotatably supported by a pair of upper and lower bearings 24 is provided at an intermediate portion of the intermediate casing 4, and a lower end portion of the rotary shaft 9 is fitted and fixed. A torque sensor 25 is arranged in the lower portion of the intermediate casing 4, and one end shaft 25a of the torque sensor 25 is slidably fitted to the support shaft 23 only in the axial direction.

A drive shaft 27 rotatably supported by a pair of upper and lower bearings 26 is disposed in the lower bearing casing 5, and the other end shaft 25b of the torque sensor 25 is slidable only in the axial direction at the upper end thereof. A drive pulley 28 is fixed to the lower end of the drive shaft 27 that is fitted and projects downward. The drive pulley 28 is rotatably driven by a motor (not shown) via a drive belt.

An opening degree adjusting shaft 29 is inserted into the hollow rotating shaft 9, and a lower end portion of the opening adjusting shaft 29 and the opening degree regulating member 15 are formed in the elongated hole 31 formed in the rotating shaft 9.
Are connected by a connecting member 30 penetrating through. Opening adjustment axis
The upper end of 29 is engaged with the upper surface of an engaging member 34 supported on the elevating member 32 via a spring 33 so as to be relatively rotatable. The elevating member 32 is configured to be movable up and down by the elevating means 35, and the elevating means 35 is driven and controlled by the control means 36 to which the output signal from the torque sensor 25 is input.

As shown in FIG. 2, the elevating means 35 is composed of a feed screw shaft 38 which is rotationally driven by a drive motor 37, a movable nut body 39 screwed to the feed screw shaft 38, and a guide rod 40 thereof. As shown in detail in FIGS. 3 and 4, the movable nut body 39 is connected to the elevating member 32 via the connecting bracket 41. 3 and 4, the connecting bracket 41 is formed in a U shape in a plan view, and both side pieces thereof and both sides of the elevating member 32 are swingably connected by horizontal connecting pins 42. Further, the coupling shaft 43 extending from the intermediate coupling portion of the coupling bracket 41 toward the movable nut body 39 perpendicularly to the axial center direction of the coupling pin 42.
Is fitted in a fitting hole 44 formed in the movable nut body 39 so as to be able to move in and out and relatively rotatable.

A bearing 45, which is loosely fitted to the opening adjusting shaft 29, is provided below the elevating member 32 to allow relative movement in the vertical direction of the opening adjusting shaft 29 and to be rotatably supported in a substantially concentric state. Is configured. Further, a thrust bearing 46 is arranged above the engaging member 34, and an engaging ring 47 and a nut 48 are provided on the upper surface thereof.
The upper end of the opening adjustment shaft 29 is engaged via the
The downward thrust force acting on 29 is rotatably supported.

According to the above configuration, when brown rice is fed into the upper casing 2 by the screw feeder 6 from the hopper 7 while the rotary shaft 9 is rotationally driven by the drive pulley 28 and the torque sensor 25 by the drive pulley 28, Is pushed into the whitening tube portion 3 by the feed roll 10 and whitening is performed between the rotating whitening roll 11 and the net 17. In the bran separated by the whitening treatment, the air introduced into the rotary shaft 9 is
And, the air is discharged to the outside together with the airflow flowing through the mesh 17 through the through hole (not shown) provided in the whitening roll 11 and toward the discharge port 18 of the bran. The refined white rice is pressed against the urging force of the spring 33 by the pressure of the brown rice pumped into the space between the net 17 of the refinement cylinder 3 and the refined roll 11 and the outer periphery of the opening regulating member 15 and the polished rice. It is sequentially discharged from an annular passage formed between the outlet forming member 19 and the rice, and then discharged from the white rice discharge port 20 through the chute 21 to the outside.

If the accuracy is higher than the set value, the load torque acting on the whitening roll 11 becomes large, and the output signal from the torque sensor 25 becomes excessively larger than the set value.
The elevating member 32 is lowered by the elevating means 35 in response to a command from the control means 36, the upward biasing force of the opening adjusting shaft 29 by the spring 33 is reduced, the opening regulating member 15 is lowered, and the opening is increased. And the precision of adjustment is lowered. On the other hand, when the accuracy of the rotation becomes low, the output signal from the torque sensor 25 becomes too small, so the elevating member 32 is raised by the elevating means 35, and the opening regulating member 15 is raised to open the opening. It becomes smaller, and the accuracy of grinding is adjusted higher. Thus, it is automatically controlled to the one with the set accuracy.

Further, at the start of operation or the end of whitening, the supply of brown rice is stopped when the upper casing 2 and the whitening tube portion 3 are filled with brown rice, and in that state, the rotary shaft 9 is rotationally driven for a predetermined time to perform a whitening treatment. When the outer peripheral surface of the opening degree control member 15 has a predetermined width in the vertical direction, unpolished rice does not flow out during the whitening process, and the white rice at the beginning of operation or at the end of whitening The unpolished rice discharged from the discharge port 20 is returned to the original state so that it can be re-polished, or the polished white roll 11 and the opening control member 15 are not complicatedly controlled. Is discharged. The state that the rice has just been filled can be detected by the output signal from the torque sensor 25.

Further, the fitting cylinder portion extended above the opening degree regulation member 15
Since 16 has a pointed upper end, it is a cylindrical recess at the lower end of the whitening roll 11 when the opening / closing member 15 is moved up and down.
The bran adhering to the peripheral surface of 14 can be scraped off, the bran does not get caught between the bottom surface of the cylindrical recess 14 and the upper end of the fitting tubular portion 16, and the inner circumference of the opening regulating member 15 Since the surface is formed as a tapered surface, the bran is smoothly discharged downward through the air between the bran and the rotating shaft 9. Therefore, the fitting recess
An opening control material for the bran that is caught between the 14 and the fitting cylinder part 16.
It is possible to reliably prevent the operation of 15 from disappearing smoothly, the initial position being displaced downward, and the unpolished rice overflowing during the above operation at the start of operation or at the end of whitening, There is no possibility that the above-mentioned operational effects are lost or become unstable.

Further, according to the above configuration, the feed roll 10 and the whitening roll 11
The rotating shaft 9, the torque sensor 25 and the drive shaft 27
Since the upper casing 2, the white polishing cylinder portion 3, the intermediate casing 4, and the lower bearing casing 5 are arranged on the axis of the body casing 1 configured by fitting and connecting on the same axis, these body casings 1 are They can be centered by fitting and connecting together with the casing to be assembled in an appropriate procedure, and can be assembled extremely easily and with a small number of steps.

Further, since the elevating member 32 is connected via the connecting bracket 41 to the movable nut body 39 so that the relative distance between the movable nut body 39 and the movable nut body 39 is variable, the elevating member 32 can be swung in two directions perpendicular to the axis of the opening degree adjusting shaft 29. Even if the moving direction of the movable nut body 39 regulated by the feed screw shaft 38 and the guide rod 40 and the axis of the opening adjustment shaft 29 are not adjusted in parallel with high precision, the lifting member 32 and the opening adjustment shaft There is no possibility that an external force will act on the opening adjustment shaft 29 during relative movement of 29, and therefore an appropriate opening adjustment action by the opening regulation member 15 can always be ensured without performing complicated adjustment work.

EFFECTS OF THE INVENTION As described above, according to the present invention, the moving member can swing in two directions perpendicular to the axis of the opening adjusting shaft and variable in the relative distance to the driving means via the connecting bracket. Therefore, even if the moving direction of the drive means and the axis of the opening adjusting shaft are not adjusted in parallel with high accuracy, the moving member adjusts the opening without applying an external force to the opening adjusting shaft. It is relatively movable along the axis, and the opening control member always moves accurately in response to the relative relationship between the internal pressure of the white polishing cylinder and the urging force of the spring, so that it is always possible to perform complicated adjustment work. The effect that the proper opening adjustment is performed is exhibited.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of a rice polishing machine according to an embodiment of the present invention,
FIG. 2 is a side view of the drive mechanism for the opening control member, FIG. 3 is an enlarged vertical front view of the main part of the drive mechanism, FIG. 4 is a partial side view of FIG. 3, and FIG. It is a schematic block diagram. 3 ... Whitening cylinder part, 11 ... Whitening roll, 15 ... Opening control member, 19
... white rice outlet forming member, 29 ... opening adjustment shaft, 32 ... lifting member (moving member), 33 ... spring, 34 ... engaging member, 35 ... lifting means (driving means), 41 ... connecting bracket.

Claims (1)

[Claims] 1. An opening regulating member for adjusting the opening degree of a white rice outlet provided at one end of a whitening tube portion having whitening rolls arranged along the axial direction by moving in the axial direction of the whitening tube portion. An opening adjustment shaft having this opening regulation member connected to one end is made to penetrate the axial center position of the rice mill roll so as to project from the other end of the whitening cylinder portion, and at an appropriate distance from the other end of the opening adjustment shaft. A spring is interposed between a moving member fitted so as to be rotatable relative to one another and an engaging member engaged with the other end of the opening adjusting shaft so as to be rotatable relative thereto, and a connecting bracket for connecting the moving member and its driving means is provided. Through a first vertical axis that is perpendicular to the axis of the opening adjusting shaft via a second vertical that is perpendicular to the axis of the opening adjusting axis and the first vertical axis. A rice milling machine connected so as to be capable of relative movement along the axis and swingable around the axis.