JPH10146534A - Grain milling apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grain milling apparatus capable of suppressing vibration at a time of the rotation of a milling rotary body by simple and inexpensive constitution and reduced in vibration. SOLUTION: A balance wt. 18 for suppressing vibration at a time of rotation is attached to a rotationally driven milling rotary body R. The milling rotary body R is supported by a lower end part so as to be freely rotationally driven around the axis in a vertical direction and the balance wt. 18 is fitted to the hollow part disposed to the upper end part of the milling rotary body R. A position where load is applied by the balance wt. 18 is freely altered and adjusted in the peripheral direction of the milling rotary body R and the wt. of the balance wt. 18 is freely altered.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grain mill provided with a rotating rotary body for milling.

[0002]

2. Description of the Related Art In such a milling machine, when the position of the center of gravity of the rotating body for milling is shifted from the axis of rotation, the rotating body for grinding is rotated in the radial direction. The grain mill was to vibrate. On the other hand, in order to provide the rotating body for polishing, in a state where the position of the center of gravity and the axis of rotation coincide with each other, it is necessary to extremely increase the processing accuracy of each part including the rotating body for polishing, and is complicated. It is not practical because adjustment is required and the cost is greatly increased. Therefore, it is more cost-effective to take measures to suppress the vibration of the milling equipment, as it is unavoidable even if the position of the center of gravity of the milling rotary body and the rotation axis slightly deviate, and it is practical. It is. Therefore, conventionally, when vibration occurs in the grain mill, a vibration isolating rubber is provided between the base portion and the installation surface of the grain mill to suppress the vibration of the grain mill. Alternatively, the vibration of the grain-milling device is suppressed by increasing the weight of the base portion of the grain-milling device.

[0003]

However, none of the above-mentioned conventional apparatuses suppresses the run-out of the milling rotary body, which is a source of vibration of the grain mill,
The effect of suppressing the vibration of the cereal mill was small, and improvement was being pursued.

The present invention has been made in view of such circumstances, and has as its object a simple and inexpensive configuration that can suppress the run-out during rotation of a milling rotary body and has a small vibration. An object of the present invention is to provide a grain device.

[0005]

According to the first aspect of the present invention, when the grinding rotary body is rotated, the run-out of the grinding rotary body is suppressed by the balance weight. The balance weight is, for example, provided to apply a load to the milling rotary body at a position eccentric from the axis of the milling rotary body, in order to suppress run-out during rotation of the milling rotary body, Can be effectively suppressed. Accordingly, with a simple and inexpensive configuration in which the balance weight is simply attached to the milling rotary body, it is possible to suppress a run-out during rotation of the milling rotary body, and to provide a milling machine with small vibration. It became so.

According to a second aspect of the present invention, the polishing rotary body is rotatably driven around the vertical axis and supported at the lower end thereof, and the balance weight is provided by the polishing rotary body. Since it is provided at the upper end of the grinding wheel, the weight of the balance weight can be reduced as much as possible, and at the same time, the run-out of the grinding rotary body during rotation can be suppressed. Moreover, since the balance weight is provided in the hollow portion at the upper end of the polishing rotary body, the polishing function of the rotary polishing body is not impaired.

According to the third aspect of the present invention, the position at which the load is applied by the balance weight is adjusted so that the run-out during rotation of the polishing rotary body can be minimized. It can be adjusted in the circumferential direction of the body and the weight of the balance weight can be changed. Therefore,
With a simple operation, the run-out of the milling rotary body during rotation can be suppressed as much as possible.

According to the fourth aspect of the present invention, the lid can be removed from the polishing rotary body by loosening the screw. Then, with the lid removed from the milling rotator, the balance weight is attached to the mounting part that is rotatably supported concentrically with the rotation axis of the milling rotator on the lid, and the lid again. Is attached to the rotating body for polishing by screwing, so that the balance weight can be provided in the hollow portion at the upper end of the rotating body for polishing. By rotating the attachment part, the position where the load is applied by the balance weight can be adjusted in the circumferential direction of the rotating body for polishing. Then, the mounting portion is rotated to a position where the run-out during rotation of the milling rotary body can be most suppressed, and is fixed to that position by the fixing means. Further, the weight of the balance weight can be easily changed by removing the lid from the rotating body for polishing. Accordingly, it is possible to simplify the operation for providing the balance weight in the hollow portion of the rotating body for polishing, the operation for adjusting the position where the load is applied by the balance weight, and the operation for changing the weight of the balance weight. Now you can.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the milling device includes a supply unit A for supplying grains to be milled,
The milling section B provided with a milling chamber 3 for milling while transporting the grains supplied from the lower inlet 1 to the upper outlet 2, and the grains discharged from the outlet 2 through the milling chamber 3 Resistance applying section C for giving resistance to the water, discharging section D for discharging the grains milled in the milling section B, and air ventilation for sucking the bran separated from the grains in the milling chamber 3 and cooling the grains. The ventilation section E is configured as a main component.

First, based on FIG.
Will be described. The base 4 includes a base 4a and the base 4
A cylindrical portion 4c for supporting the shaft, the axis of which is vertically oriented on a, and a cylindrical portion for forming a polishing chamber located coaxially with the upper end of the cylindrical portion 4c for supporting the shaft. Part 4d
And an outer cylindrical portion 4b, which is located on the base 4a and surrounds the cylindrical portion 4c for supporting the shaft and the cylindrical portion 4d for forming the milling chamber.

Next, the supply section A will be described with reference to FIG. The supply section A includes a grain supply path 23 connected to a receiving port 1 formed below the peripheral wall of the milling chamber forming cylindrical section 4d as described below, and a rotatable inside of the grain supply path 23. A lateral feed screw 24 provided to be supported, a supply electric motor M2 for rotationally driving the lateral feed screw 24, and a hopper 25 connected to and connected to the grain supply path 23.
And a shutter 26 interposed at the discharge port of the hopper 25.

Next, the polishing section B will be described with reference to FIGS. The milling unit B is attached to the upper part of the milling room forming cylindrical portion 4d with the bran removing tube F with the longitudinal direction thereof oriented in the vertical direction.
Is supported on the shaft-supporting cylindrical portion 4c using a pair of bearings 17 so as to be rotatable about a vertical axis,
The lower end of the rotating body R for milling is rotated integrally with the driving shaft 16 in a state where the rotating center R is positioned in the milling chamber forming cylindrical portion 4d and the bran removing tube F with the axis thereof oriented vertically. They are connected freely. Thus, the milling rotary member R is supported at the lower end so as to be rotatable around the vertical axis. The driving shaft 16 is an electric motor M for polishing.
1 is driven to rotate.

In a hollow portion provided at the upper end of the rotating body for grinding R, there is provided a balance weight 18 for suppressing run-out of the rotating body for grinding R when the rotating body for grinding R is rotating.
Is attached.

Further, an outer casing 6 is removably attached to the upper end of the outer cylindrical portion 4b so as to surround the bran removing tube F.

The resistance applying section C and the discharging section D are formed in an integrated state, and the resistance applying section C and the discharging section D in the integrated state are
At the upper end of the bran removing tube F, with a bolt 30 and a nut 31,
It is attached detachably.

A milling chamber 3 is formed inside the bran removing tube F and the cylindrical portion 4d for forming the milling room, and the bran removing tube F, the cylindrical portion 4d for forming the milling room, the cylindrical portion 4c for the shaft support, and the exterior A bran collection chamber 7 is formed between the cylinder 6 and the outer cylindrical portion 4b. In addition, the bran collection chamber 7 is provided on the outer cylinder 6 so that the bran collection chamber 7 can be seen through from the outside.
It is provided with a transparent member. A receiving port 1 is formed below the peripheral wall of the cylindrical portion 4d for forming a polishing room.

The bran collecting chamber 7 communicates with a fan chamber 4e formed in the base 4a through a ring-shaped opening 4f.

The bran removing tube F will be described. In the bran removing tube F, upper ends and lower ends of a plurality of grooved frames 8 arranged inward at equal intervals in the circumferential direction are respectively connected by connection blocks 9 so as to close gaps between adjacent grooved frames 8. A screen member 10 as a porous member is provided, and a grindstone 11 is provided along the inside of the groove of each groove type frame 8. The screen member 10 is provided with a large number of ventilation holes 10a for discharging the bran peeled off from the grains during the polishing to the bran collection chamber 7.

In each connection block 9, the one formed at one end of the bran removing tube F in the longitudinal direction and the one formed at the other end thereof overlap in the longitudinal direction. In this state, eight bolt insertion holes 9a are formed.

At the upper end of the milling chamber forming cylindrical portion 4d,
Eight bolts 12 are inserted into eight bolt insertion holes 9
a so as to be able to be inserted through a. Then, in a state where the eight bolt insertion holes 9a of the bran removing tube F are inserted into the eight bolts 12, the bran removing tube F is placed on the upper end portion of the cylindrical portion 4d for forming a milling chamber. The nut 13 is screwed into the nut to remove the bran tube F into the cylindrical portion 4 for forming the milling room.
It is attached to d.

Next, the rotating body R for polishing will be described. The milling rotary member R coaxially comprises a cylindrical conveying screw 14 for conveying the grains supplied from the receiving port 1 toward the discharge port 2 and a cylindrical polishing roll 15 for milling the grains. The milling rotary body R is
With the milling roll 15 positioned on the discharge port 2 side, the polishing roll 15 is connected to the driving shaft 16 so as to be rotatable integrally.

A passage formed by connecting the insides of the cylinders of the milling rotary member R and the driving shaft member 16 in series is a ventilation passage H.
It is configured to function as. Drive shaft 16
The lower end opening is open for ventilation of grain cooling air to be described later.

The milling roll 15 is a cylindrical roll body 1
5a and a bottomed cylindrical lid 15b screwed to the upper end opening of the roll body 15a to close the upper end opening
And two grindstones 15c provided in grooves formed at regular intervals in the circumferential direction on the outer peripheral surface of the roll body 15a. A large number of ventilation holes 15h, which open from the inside of the cylinder (air passage H) to the outer peripheral portion, are arranged in rows in the vertical direction in each of the portions of the roll body 15a corresponding to between the grindstones 15c. .

Next, the balance weight 18 and its mounting structure will be described with reference to FIGS. The cylindrical mounting member 19 for mounting the balance weight 18 is slidably fitted inside the cylinder of the lid 15b of the milling roll 15, and the rotating shaft screw 20 is used to rotate the grinding shaft 15 with the rotating shaft screw 20. It is supported by the lid 15b so as to be rotatable concentrically. In addition, a screw 21 (corresponding to a fixing means) for preventing rotation of the mounting member 19 is provided by screwing into the peripheral wall of the lid 15b to press the mounting member 19.

The balance weight 18 includes a disk-shaped weight 18 a having a screw insertion hole at the center and a mounting screw 1 for mounting the weight 18 a to the mounting member 19.
8b. Then, with the mounting screw 18b inserted into the screw insertion hole of the weight 18a, the balance weight 18 is screwed into the mounting member 19 at a position eccentric from the center thereof, thereby turning the balance weight 18 into the axial center of the milling rotary member R. It is provided so as to apply a load to the rotating body R for polishing at a position eccentric from the center. Further, by rotating the attachment member 19, the position where the load is applied by the balance weight 18 can be changed and adjusted in the circumferential direction of the rotating body R for polishing. The weight 18a has various weights. And weight 18a of those various weights
From, select and combine any one or more,
By attaching the balance weight 18 to the attachment member 19, the weight of the balance weight 18 can be changed. The weight of the balance weight 18 is the sum of the weight of the mounting screws 18b.

As will be described later, the milling rotator R is selected so as to have a set weight that is set so as to minimize the run-out of the rotator R during rotation, or to be closest to the set weight. One or more weights 18a are attached to the attachment member 19 with attachment screws 18b. In addition, by the rotation of the mounting member 19, the circumferential mounting position of the milling roll 15 on the balance weight 18 is set such that the run-out of the milling rotary member R during rotation is minimized, as described later. The mounting member 19 is adjusted so as to reach the set position, and at that position, the attachment member 19 is stopped from rotating by the rotation stopper screw 21.

Next, the discharge section D will be described with reference to FIG. 1, FIG. 2 and FIG. The discharge portion D is configured such that a casing 28 for forming a discharge chamber is communicatively connected to an upper portion of the flanged cylindrical body 27, and a discharge chute 29 is communicatively connected to the casing 28.

The inner diameter of the flanged cylindrical body 27 is
, And the outer shape of the flange portion of the flanged cylindrical body 27 is substantially the same as the inner diameter of the outer cylinder 6. Four bolt insertion holes 27a are formed in the flange portion of the flanged cylindrical body 27 in a state where they are aligned with every other four of the eight bolt insertion holes 9a of the bran removing tube F. It is. A plurality of ventilation holes 27b are formed in the flange portion of the flanged cylindrical body 27.

Then, with the four bolt insertion holes 27a of the flanged cylindrical body 27 aligned with every other four bolt insertion holes 9a of the bran removing tube F, the discharging portion D (resistance applying member to be described later) is used. (Integrated with the part C) is placed on the bran removing tube F. Then, the bolts 30 are inserted through the bolt insertion holes 27a and the bolt insertion holes 9a which are connected in series, and the nuts 31 are screwed into the respective bolts 30.
And the upper end opening of the outer cylinder 6 is closed by the flange portion of the flanged cylindrical body 27. In this manner, with the flanged cylinder 27 attached to the bran removing tube F, the upper opening of the flanged cylinder 27 functions as the outlet 2 of the milling chamber 3.

The attachment of the balance weight 18 and the like is performed by releasing the screwing of the bolt 30 and the nut 31 and removing the discharge portion D integrated with the resistance applying portion E from the bran removing tube F.

Next, the resistance applying section C will be described with reference to FIGS. 1, 5, 6 and 7. Resistance application part C
The guides 33 of the resistor support base 33
a, the milling chamber 3 is guided and supported so as to be reciprocally movable along the flow direction (that is, up and down direction) of the grains flowing toward the discharge port 2 in the milling chamber 3, and the receiving member 34 is supported by the rack 35 and the pinion 3.
6, the position in the up-down direction with respect to the resistor support base 33 is provided so as to be changeable and adjustable.
7 is provided on the receiving member 34 so as to urge the resistor 32 in a direction approaching the discharge port 2 and is configured. Further, in the resistance applying portion C, the grain flowing out of the outlet 2 is determined based on the vertical position of the resistor 32 with respect to the resistor support base 33, that is, the vertical position of the resistor 32 with respect to the outlet 2. A flow rate display section 38 for displaying the flow rate of the particles is provided.

The resistor 32 is composed of a guide tubular member 32a guided by a guide portion 33a and a frusto-conical pressure plate connected to one end of the resistor 32a by a bearing 32b so as to be rotatable around its axis. 32c. The resistor support base 33 is mounted on the upper part of the casing 28, and the resistor support base 33 includes the guide tubular member 3 of the resistor 32.
A cylindrical hollow guide portion 33a that is fitted inside 2a and guides in a sliding state is provided so as to be coaxial with the cylindrical body 27 with the flange. The resistor 32 is provided so that the guide tubular member 32a is fitted in the guide portion 33a, so that the resistor 32 can reciprocate vertically.

On the peripheral wall of the guide tubular member 32a, two notches s extending in the vertical direction are provided so as to face each other. A rack 35 is attached to the receiving member 34 so as to face one of the two cutouts s.
A sliding contact portion 34a is fitted into the other one of the cutouts s and slidably contacts the guide portion 33a. And
The receiving member 34 is fitted with the sliding contact portion 34a into the notch s, and the rack 35 is connected to the resistor support base 33.
The pinion 36 is rotatably supported by the pinion 36, and the pinion 36 is rotated so that the position of the receiving member 34 with respect to the resistor support base 33 can be changed and adjusted in the vertical direction. It is like that.

The coil spring 37 is sandwiched between the spring receiving portion h at the lower end of the receiving member 34 and the spring receiving portion h of the guiding tubular member 32a inside the guide tubular member 32a. The resistor 32 is provided so as to urge the resistor 32 downward, that is, in a direction approaching the discharge port 2.

A support member 39 is attached to the guide cylindrical member 32a of the resistor 32, and three shaft members 40 are individually inserted into through holes 28a formed in the upper surface of the casing 28, and the lower ends thereof are respectively connected. The portions are fixed to the support member 39, and the respective upper ends are connected by a connecting member 41. Thereby, the rotation of the guide tubular member 32a around its axis is prevented.

The flow rate display section 38 is configured to indicate a scale 38b attached to the resistor support base 33 with an indicator needle 38a attached to the connecting member 41.

Next, the ventilation section E will be described with reference to FIG. A fan 22 is provided in a fan chamber 4e formed in the base 4a so as to suction the bran collection chamber 7 through the opening 4f.

When the fan 22 is operated, FIG.
As shown by the solid arrow in FIG.
The air sucked from the lower end opening portion flows through the ventilation passage H, the ventilation hole 15h, the milling room 3, the ventilation hole 10a, the bran collection chamber 7, and the opening portion 4f in order, and the discharge port 4 formed in the fan chamber 4e.
g is discharged to the outside, and in parallel with that, the bran separated from the grains in the polishing room 3 is discharged along with the polishing. or,
By the suction action of the fan 22, air is sucked in from the outside through the ventilation holes 27b of the flanged cylindrical body 27 and allowed to flow along the inner surface of the exterior body 6, so that the transparent portion of the exterior body 6 is clouded by bran or the like. It is configured to prevent

Next, based on FIGS. 8 and 9, the run-out of the milling rotary member R during rotation is minimized.
A method for setting the weight and the mounting position of the balance weight 18 will be described. With the attachment member 19 removed, the adjusting disk 42 is fixed to the upper part of the lid 15b with a screw concentrically with the rotation axis of the milling roll 15.
The adjusting disk 42 has a plurality of mounting holes 42a formed at equal intervals along the circumference of a virtual circle concentric with the center thereof. An adjusting weight 43 having an arbitrary weight is attached to the adjusting disc 42.
Is attached using an optional mounting hole 42a with an adjusting weight mounting screw 44. Then, the rotating body R for polishing is rotationally driven, and the run-out of the rotating body R for polishing is observed. By sequentially changing the mounting holes 42a for attaching the adjustment weights 43 and observing the run-out of the milling rotary body R each time the change is made, the run-out of the milling rotary body R is minimized on the virtual circumference. Find the position. The position thus obtained is the set position.

Next, adjusting weights 43 having different weights are sequentially attached to the mounting holes 42a closest to the set position, and the run-out of the milling rotary body R is observed each time. The weight of the adjusting weight 43 when the runout is minimized is determined. Therefore, the weight obtained by adding the weight thus obtained and the weight of the adjusting weight mounting screw 44 is added to the rotation axis of the polishing rotary member R and the adjusting weight 4.
3 is the distance L1 between the axis of rotation of the rotating body R for milling and the mounting position of the balance weight 18.
The weight multiplied by the value (L1 / L2) divided by 2 becomes the set weight.

[Another Embodiment] Next, another embodiment will be described. (B) The balance weight 18 is changed so that the position where the load is applied can be changed and adjusted in the circumferential direction of the rotating body R for polishing.
The structure for attaching to the rotating body for polishing R is not limited to the structure exemplified in the above embodiment,
Various configurations are possible. For example, balance weight 1
8 may be configured so as to be integrally provided with an arm portion, and the arm portion may be supported on the rotating body R for polishing so as to be swingable concentrically with the rotation axis thereof.

(B) In the above-described embodiment, the rotating weight R for polishing is attached to the balance weight 18 via the mounting member 19.
Although it was illustrated about the case of attaching to, instead of this,
The balance weight 18 may be directly attached to the rotating body R for polishing. In this case, for example, a plurality of screw holes are formed in the inner circumferential portion of the rotating body R for polishing along the circumferential direction, and the screw holes located at or near the set position are used to achieve balance. The weight 18 is configured to be screwed.

(C) The mounting position of the balance weight 18 on the rotating body R for polishing is not limited to the upper end illustrated in the above embodiment, but can be changed. However, it is more effective to mount the rotator R on the upper end portion of the milling rotary member R to suppress the run-out.

(D) In the above embodiment, the case where the balance weight 18 is attached to the inside of the cylinder of the rotating body R for polishing is exemplified. For example, it may be attached in a state of being buried in the cylindrical wall so as not to impair.

(E) In the above embodiment, the present invention is applied to a vertical milling machine configured to rotate and drive the rotating body for grinding R about a vertical axis. However, the present invention can also be applied to a horizontal milling apparatus other than a vertical milling apparatus, for example, a horizontal milling apparatus configured to rotationally drive a rotary body for grinding R about a horizontal axis. it can.

(F) In the above embodiment, the case where the present invention is applied to a grain mill in which the grindstone 15c is attached to the grinding rotary member R has been exemplified. However, instead of the grindstone 15c, a brush for polishing rice is used. Can also be applied to a rice milling device attached to a rotating body R for polishing.

(G) In the above embodiment, the case where the balance weight 18 is provided so as to apply a load to the grinding rotary member R at a position eccentric from the axis of the grinding rotary member R has been exemplified. Instead of this, for example, a ring-shaped balance weight 18 is provided so as to increase the moment of inertia around the rotation axis of the rotating body R for polishing.
The milling rotary member R may be provided concentrically. However, when the load is applied to the polishing rotator R at a position eccentric from the axis of the polishing rotator R, the run-out suppressing effect is more excellent.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view showing an entire configuration of a grain milling apparatus.

[Fig. 2] Vertical front view of the milling section

FIG. 3 is a view taken in the direction of the arrow II in FIG. 2;

FIG. 4 is a view as viewed from the direction of the arrow in FIG. 2;

FIG. 5 is a plan view of a resistance applying unit.

FIG. 6 is a longitudinal sectional front view of a resistance applying unit.

FIG. 7 is a view as viewed from the direction indicated by the arrow C in FIG. 6;

FIG. 8 is a longitudinal sectional front view of a main part of the rotary body for polishing, for explaining a method of setting the weight and the mounting position of the balance weight so that the rotation of the rotary body for polishing during rotation is minimized. Figure

FIG. 9 is a plan view of the grinding rotary body for explaining a method of setting the weight and the mounting position of the balance weight so that the swing of the polishing rotary body during rotation is minimized.

[Explanation of symbols]

 15b Lid 18 Balance weight 19 Mounting part 21 Fixing means R Rotating body for polishing

Claims (4)

[Claims] 1. A grain milling machine in which a balance weight for suppressing run-out during rotation is attached to a rotating rotary body for milling. 2. The milling rotary body is rotatably driven around a vertical axis and supported at a lower end thereof, and the balance weight is provided at an upper end of the milling rotary body. 2. The grain mill according to claim 1, wherein the grain mill is provided in a hollow portion. 3. The position where a load is applied by the balance weight is configured to be changeable and adjustable in the circumferential direction of the polishing rotary body, and the balance weight is configured to be changeable in weight. 3. A grain mill according to claim 2. 4. The milling rotary body is provided with a lid that is screwed to an upper end thereof to close the hollow portion, and an attaching part to which the balance weight is attached is provided.
The fixing means which is supported by the lid part and is fixed to the lid part so as to be rotatable concentrically with a rotation axis of the rotating body for polishing is provided. Milling equipment.