JP3435914B2 - Rice mill resistance plate adjuster - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grain mill,
The present invention relates to a resistance adjusting device for a grain mill capable of performing fine adjustments from fine grinding to high whiteness grinding. 2. Description of the Related Art Generally, a milling machine is provided with a resistance plate which is located outside the milling chamber and urges toward the end of the milling chamber in order to adjust the pressure in the milling chamber. . As a means for urging the resistance plate, a so-called weight has been used in many cases, but in order to automatically or semi-automatically adjust the pressure in the refining chamber, a driving device such as a stepping motor is used. Many adjust the biasing force of the resistance plate. FIG. 7 shows an example of a conventional resistance plate adjusting device for a grain mill in such a conventional art. A driving device such as a stepping motor presses the resistance plate through an elastic body such as a spring. It was done. More specifically, a resistance plate 102 is provided at the lower end of the lever 100 via a ball joint 101, and one end of a compression coil spring 103 as a shock absorber is connected to the upper end of the lever 100. The other end of the compression coil spring 103 is connected to an end of the tooth bar 104. Reference numeral 105 denotes an arm rotatably supporting a portion between the mounting portion of the ball joint 101 of the lever 100 and the compression coil spring 103.
The arm 105 is fixed to the discharge gutter 106. Reference numerals 107 and 108 are caps for guiding the expansion and contraction of the compression coil spring 103. In this conventional example, a stepping mode is used.
The end of the tooth stick 104 having the rack 111 engaged with the pinion 110 of the pin
To one end of the compression coil spring 103. The driving of the stepping motor 109 reciprocates in the axial direction of the tooth rod 104 via the pinion 110, and when the tooth rod 104 moves in the direction of pushing the lever 100, the compression coil spring 10 is driven.
3 is contracted, and the resistance plate 102 is moved closer to the discharge port 106 with the joint between the lever 100 and the arm 105 as a fulcrum. The setting current value input from the current setting input device is compared with the averaged current value of the motor of the present apparatus input from the motor current detecting apparatus of the present apparatus, and the stepping motor is set so as to match the two. The resistor 109 is driven to
Is opened and closed, and a subtle change in resistance in the refining chamber is absorbed by the compression coil spring 103 via the resistance plate 102 and the lever 100. In the conventional example shown in FIG. 7, the strength of the resistance plate 102 is adjusted by the reciprocating movement of the tooth bar 104 in the axial direction. 1
The resistance adjustment width is determined by the drive stroke 04. That is, when the biasing force of the resistance plate 102 is adjusted by the reciprocating motion of the tooth rod 104, the width of adjustment of the biasing force can be set wider by increasing the compression stroke of the compression coil spring 103. However, on the other hand, the extension of the tooth shaft 104 becomes longer because the tooth shaft 104 requires a longer stroke,
The tooth stick 104 is largely moved back and forth by the in / out movement, and the device becomes large-scale due to the stroke extending in front and behind the tooth stick 104. Further, if the compression stroke of the compression coil spring 103 is long, the range of adjustment of the biasing force can be set wide.
An auxiliary device is required so that 03 does not bend. Further, since the repulsive force of the compression coil spring 103 increases and decreases in proportion to the pressing force of the tooth bar 104, if the adjustment speed is adjusted to minute grinding, which is a resistance adjustment of minute increase and decrease,
When the whiteness of 7 minutes or more requires a large resistance increase / decrease adjustment, if the driving device of the tooth stick 104 is always driven in the same step, it will take time to adjust the resistance when the whiteness becomes high. Become. That is, if the adjustment speed is adjusted to high whiteness, fine adjustment of minute grinding becomes difficult. By the way, since the lever 100 reciprocates, the lever 100 operates so as to draw an arc around the connection point with the arm 105, so that the tooth rod 1 reciprocates on a straight line.
The force acting at right angles to the arm 105 from the extension point of 04 is temporary. That is, the connection point between the arm 105 and the compression coil spring 103 is always
Is acting. This means
This means that the force for bending the tooth stick 104 is acting,
A device for securing the overall strength of the resistance adjusting device is required. As described above, the conventional technology has various problems, and it has been possible to adjust the degree of milling in an arbitrary narrow range. It could not be adjusted. Moreover, this has been a major obstacle to automating the adjustment of the degree of milling over a range from zero to high whiteness.
An object of the present invention is to solve the above-mentioned problems by using an inexpensive component that does not require a complicated configuration and does not require high-precision components. [0010] In order to solve the above-mentioned problems, the present invention has a spiral rotator and a fine trochanter mounted on a main shaft rotatably mounted in a rice bran polishing cylinder having a porous wall. The gap between the rice bran milling cylinder and milling trochanter is defined as a milling chamber, a grain outlet at the end of the milling chamber, and a grain inlet at the beginning of the milling chamber. In a grain mill provided with a resistance plate adjusting device biased by a resistance plate, a) the resistance plate adjusting device is provided with the resistance plate at one end of a balance arm provided in the vicinity of the grain discharge port, and the other. It consists of a biasing device with a biasing adjustment device connected to the end. B) urging regulating device continuously provided and a relatively large spring relatively small spring and the elastic coefficient of the elastic modulus coaxially, before the screw rod directly connected to the rotation shaft of the rotary drive device
It is arranged to face the other end of the balance arm. C) Rotation is prevented by a guide extending parallel to the screw rod.
The stopped moving pedestal is screwed into the screw rod, and the tip of the screw rod is
Part penetrates the pressing member engaged with the other end of the balance arm.
And the screw rod is loosely fitted in the two springs.
Between the pressing member and the movable base.
Intervening. D) Further, the fixed base on which the rotary drive device is fixed,
A bracket for fixing the rotary drive and the bracket;
It consists of a support bracket that rotatably supports
The force adjusting device includes a pendulum with the support bracket as a fulcrum.
Operable. This is a technical measure. [0011] [action] urging adjustment device of the present invention, since the connecting and relatively large spring and small becomes spring modulus coaxially, the addition of pressure to these springs, first, relatively A spring with a small elastic coefficient shrinks.
While the spring is contracted, a relatively small urging force is applied to the discharge port, so that fine adjustment of minute grinding (about 5 to 5 minutes) can be performed. At this time, the spring having a large elastic coefficient has not yet contracted. Further, when a pressing force is applied, the spring having a small elastic coefficient finally contracts completely, and after the contraction is completed, a pressing force is applied to the spring having a large elastic coefficient. The urging force from here will increase dramatically, but milling with high whiteness of 7 minutes or more requires a large urging force, so this change will work effectively in high whiteness milling. . [0012] That is, by rotating the threaded rod by operating the rotary drive device, by moving the seat guide, are prevented so-called co-rotation, to move the screw杆上the direction of the pressing member. Then, when the moving pedestal is moved, first, the spring having a relatively small elastic coefficient shrinks, and further, when the moving pedestal moves in the direction of the pressing member, the spring having a small elastic coefficient finally shrinks completely, and after being completely shrunk, A pressing force is applied only to a spring having a large elastic coefficient. From the above, the biasing of the resistance plate by the spring can be performed by rotating the screw rod by the rotary driving device and moving the movable seat screwed to the screw rod, whereby the movable seat presses the spring. it can. That is,
Since the screw rod does not move back and forth as in the prior art, it is not necessary to adopt a structure in which the width of movement of the tooth bar in the front and back is taken into account when mounting the present apparatus. In addition, since the two types of springs are sequentially loosely fitted to the screw rod with the movable pedestal as a seat, even if the spring is long, it is possible to prevent the spring from being bent due to the pressing of the movable pedestal. In the present invention, two kinds of springs having different elastic coefficients are used, and a spring having a small elastic coefficient is used for fine grinding so that the spring can be finely adjusted with a relatively small urging force. For polishing, a spring having a large elastic coefficient is used so that it can be largely adjusted with a relatively large urging force. At this time, when the load is low, the large spring acts as a rigid body, and when the load is high, the small spring is completely contracted and becomes integral with the movable pedestal, so that the bias adjustment is not hindered. Incidentally, these two types of springs are appropriately selected according to the required load. Further, it is easy to realize a resistance plate adjusting device that detects a load current of an electric motor or the like that drives the grain mill and controls the driving device so that the load current has a target value. Further , when the balance arm is pressed by the urging adjustment device, even when the balance arm is rotated by the pressing and the intersection point between the extension point of the screw rod and the balance arm is not at a right angle, the rotary drive for directly connecting the screw rod is provided. The bracket of the device is rotatable in a pendulum state by means of a support bracket, so that said intersection can always contact at a right angle. Therefore, no extra bending force acts on the screw or the spring. Next, a preferred embodiment of the present invention will be described with reference to FIGS.
This will be described with reference to FIG. A main shaft 4 is rotatably mounted by a pair of bearings 2 and 3 on an upper portion of the inside of the box-shaped outer frame 1. A hollow portion 4 a is formed in the main shaft 4, and one end on the side on which the passive pulley is mounted is opened. The other end is closed. In the vicinity of the other end, a large number of blowing holes 5 are provided, and a stirring roll 6 as a whitening roll is mounted around the blowing holes 5. A polygonal tube, for example, a hexagonal tube-shaped bran-removing wire mesh 7 is provided around the stirring roll 6 with a certain gap therebetween.
The peripheral surface of the bran removing mesh 7 is formed by a porous wall, and the bran removing mesh 7 is supported by a wire support 8. The predetermined gap is defined as a refining chamber 9 and a dust collecting chamber 10 is formed so as to surround the bran-removing wire mesh 7. The lower part of the dust collecting chamber 10 is collected via a dust collecting hopper 11. It is connected to the dust duct 12. A discharge ring 13 is provided so as to be connected to the refining chamber 9, and an end of the discharge ring 13 serves as a discharge port 14. The discharge port 14 is perspective freely resistance plate 15 to face to the discharge port 14 is provided. The resistance plate 15 is a balance arm.
The arm 18 is loosely attached to an urging shaft 53 fixed to one end of the arm 18. The center of both ends of the balance arm 18 is rotatably supported by a rotation shaft 17 provided at an end of a support arm 16 fixed to the discharge ring 13. As described above, the biasing device 20 is constituted by the resistance plate 15, the support arm 16, and the balance arm 18. The other end of the balance arm 18 is connected to a bias adjusting device 22. The urging adjustment device 22 is configured as follows. A fixed base 24 for fixing a reversible motor 23 is provided on a side wall portion forming the dust collecting chamber 10.
Reference numeral 4 denotes a shaft 2 fixed to the bracket 25 to which the reversible motor 23 is fixed and a support bracket 26 fixed to the side wall of the dust collecting chamber 10.
7 and a support bracket 26 so as to be rotatable about a shaft. A screw rod 29 of an arbitrary length is directly connected to the drive shaft 28 of the reversible motor 23 in the axial direction. The screw 29 has
A movable pedestal 31 that moves along a guide 30 having one end fixed to the bracket 25 so as to be parallel to the screw rod 29 is screwed. Further, a spring 32 having a relatively small elastic coefficient and a spring 33 having a relatively large elastic coefficient are sequentially loosely fitted to the screw 29 with the movable base 31 as a seat, and the spring 33 having a large elastic coefficient and the spring 33 have a large elastic coefficient. A ring 52 serving as a seat for the springs 32 and 33 is interposed between the small springs 32. Further, the distal end of the spring 33 having a large elastic coefficient is brought into contact with a pressing member 34 that penetrates the screw rod 29 and is fixed. The urging adjustment device 22 is configured as described above. The balance A of the pressing member 34 and the resistor device 20 of the biasing adjustment device 22 - arm 18 the upper portion of the other end portion 21 and is pierced the movable pin 35 to be engaged member and the pressing member 34 and the balance A -Linked and connected to by this,
The pressing force of both springs 32 and 33 is
It is connected to the resistance plate 15 via the movable pin 35 and the balance arm 18 and serves to urge the grains discharged from the discharge port 14 toward the milling chamber 9. The above-described urging device 20 and the urging adjusting device 22 constitute a resistance plate adjusting device. A discharge hopper-3 is located below the discharge port 14.
6 is attached. A screw roll 37 is attached to the main shaft 4 by being connected to the stirring roll 6. Screw roll 37
A thread is formed on the peripheral surface of the
Around the start end side of 7, a cylindrical funnel base 39 having a supply port 38 opened is provided. That is, one end of the funnel table 39 is connected to the refining chamber 9, and the other end is closed and has a circular hole 40 that penetrates the main shaft 4 rotatably. Supply port 3
A supply gutter 41 is connected to 8, and the supply gutter 41 is further connected to a supply hopper 42, and a slide plate 43 for opening and closing the hopper is provided at a lower end of the supply hopper 42. The slide plate 43 is slidable at an inclination angle of at least 40 degrees or more with respect to the horizontal direction. When the slide plate 43 is closed, the slide plate 43 comes into contact with a slightly upper position of the supply hopper wall 44. In addition, a closing plate 45 for covering a linear portion where the slide plate 43 and the supply hopper-wall 44 are in contact with each other is fixed so as not to contact the slide plate 43. The closing plate 45 preferably has an inclination angle of at least 40 degrees. A blocking plate 54 may be provided also on the upper side of the supply hopper wall 44 on the insertion side of the slide plate 43. In this configuration, not only the flow rate can be adjusted by the slide plate 43 but also the opening / closing valve can be used. In other words, by providing the closing plate 45, there is no "rice biting phenomenon" when the slide plate 43 is operated, and there is no need to provide an on-off valve in addition to the flow control valve as in the related art. A blower 46 is disposed in the middle of the outer frame 1, and the end of the bran collecting duct 12 is connected to the air intake 47 of the blower 46, and the end of the air exhaust 48 is cyclone-connected. A bran collecting duct 49 connected to a collector (not shown) is connected. The air blower 46 is directly driven by a motor 51 that is different from the motor 50 that drives the main shaft 4 of the grain mill, and the main shaft 4 of the grain mill and the blower 46 are the same as in the related art. The total cost of the motor is lower than that of the motor driven by a belt. In addition, exhaust fan 46
The dust collection duct 12 extends from the dust collection hopper 11 to the blower 46 because the air suction port 47 of the air blower 46 is disposed so as to face the dust collection hopper 11 with the installation of the air blower 46 almost immediately below the dust collection hopper 11. No large bends occur and bran is collected in dust collection duct 12
It does not occur that the dust collecting duct 12 is clogged up at the bent part of the dust collecting duct 12. Further, since the electric motor 51 is provided alone, the discharge direction can be changed by the air blower 46 alone, so that the work becomes very easy. The operation of the resistance plate adjusting device for a grain mill constructed as described above will be described with reference to FIGS. Dust collection room 1
Reversible motor fixed to the fixed base 24 on the side wall portion
When the movable base 31 is gradually rotated from the reversible motor 23 side to the balance arm 18 side by rotating the motor 23, first, the spring 32 having a small elastic coefficient shrinks and the stress is reduced. Acts on the system 18. As a result, the pressing force of the springs 32 and 33 is communicated to the resistance plate 15 via the pressing member 34, the movable pin 35 and the balance arm 18, and the grains discharged from the discharge port 14 are urged. . The elastic modulus is small spring 32 becomes relatively small stress, the biasing force of the resistance plate 15 for generating is also small. At this time, the grains milled in the milling room 9
It is milled to a relatively low degree of milling, and so-called continuous milling of minute milling is possible. Further, when the reversible motor 23 is operated to move the movable pedestal 31 toward the balance arm 18, the spring 32 is compressed between the movable pedestal 31 and the spring 33 and completely contracted. At this time,
A pair of springs 3 so that the degree of milling is about 5 minutes
It is preferable to select a combination of 2,33. When the spring 32 having a small elastic coefficient contracts, the other spring 33 starts to be pressed by the spring 32 and the ring 52 and gradually contracts. Since the spring 33 has a relatively large elastic coefficient, the urging force of the resistance plate 15 is large and the milling degree of the grain mill is higher than that of the spring 32 having a small elastic coefficient, but the milling degree is about 7 minutes. Therefore, even if the urging force becomes large, the whiteness does not increase sharply, but the increase in the milling whiteness is generally slower than before. [0029] As shown in FIG. 6 the change in whiteness increase the spring stress against the movement of the movable pedestal 31. The graph of FIG. 6 shows that the whiteness rise with respect to the linear movement distance of the movable pedestal 31
This is a change in spring stress. Although it depends on how to take the elastic modulus of the pair of springs 32 and 33, the clear distinction that the stress of the spring 32 with the small elastic modulus completely disappears and the stress of the spring 33 with the large elastic coefficient acts on the spring 32 next. The sum of the stresses of the springs 32 and 33 acts as a biasing force. Therefore, it is ideal that the whiteness rise curve of FIG. 6 changes linearly, and the springs 32 and 33 are arranged so that the whiteness rise curve approaches this straight line as much as possible.
Need to be combined with By the way, the stress of the pair of springs 32 and 33 by the movement of the moving base 31 balance A by the pressing member 34 - is transmitted to the arm 18, Riva - Shiburumo - threaded rod 29 which is directly connected data 23 and it does not shake As described above, if these are fixed to the fixed base 24, the following trouble occurs. First, since the resistance plate 15 is urged against the force for discharging the grain, the resistance plate 15 and the balance arm 18 are always kept.
Is moving, the angle between the pressing member 34 and the balance arm 18 is not constant, and the pressing direction of the pressing member 34 and the balance arm 18 are different.
The distortion caused by the slight vertical movement due to the rotation of the program 18 occurs. In addition, the angle between the pressing member 34 and the balance arm 18 is also changed by moving the movable pedestal 31 left and right, and particularly when performing high-whiteness crushing, the urging of the resistance plate 15 is performed. Is applied to this portion, the spring 33 may be bent, and the force acts on the screw rod 29 accordingly (see FIG. 5). However, in the present invention, the shaft 27 of the bracket 25 to which the reversible motor 23 is fixed is
, The entire urging adjustment device 22 swings around the shaft 27 in accordance with the rotation of the balance arm 18, and the pressing force of the pressing member 34 is always adjusted by the balance arm. Acts at a right angle to the arm 18 and does not cause the spring to bend or the screw 29 to be distorted. Although a detailed description in this embodiment is omitted, a current detector (not shown) of the electric motor 50 for driving the main shaft 4 is provided.
By connecting the reversible motor 23 and the reversible motor 23 via the control device, it is easy to control the reversible motor 23 according to the change in the load current of the electric motor 50. In the present invention, a reversible motor is used as the rotating device.
Although the motor 23 is shown, it can also be realized by using other motors or using a manual rotating handle. In this embodiment, since the screw rod 29 is not moved by merely rotating it, no extra space is required, and the same effect can be obtained with a small space by screwing the moving pedestal 31. it can. Also, two types of springs 3
Because I used a combination of 2,33,
Can continuously change from no load to the required high load. These springs 32 and 33 are
9, the spring does not bend due to compression of the spring. Furthermore, biasing adjustment device 22, so are the rotatable around the shaft 27 by the support bracket 26, the balance A - the point of contact with the arm 18 and the pressing member 34 can be always perpendicular . This means that the pressing force due to the spring stress can be efficiently transmitted to the balance arm 18.
Conversely, the pressure at the discharge port 14 against the pressing force can be entirely received by the pressing member 34 from the balance arm 18, and the bending such as bending at the contact portion does not occur. As described above, according to the resistance plate adjusting device for a grain mill of the present invention, the degree of milling can be continuously adjusted from minute grinding to high degree of whitening, and rotation can be performed at a constant speed. Even with a rotary drive, the resistance can be adjusted smoothly without delay, so that the automatic resistance adjustment for refining can be performed continuously from zero to high whiteness , and the rotary drive can be set in a pendulum state. Since it is rotatable, no extra bending force acts on the screw or spring, and the safety of the entire resistance plate adjusting device can be secured with a simple structure.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side sectional view of a grain mill according to an embodiment of the present invention. FIG. 2 is an enlarged view of a main part of the grain mill. FIG. 3 is an enlarged sectional view showing the hopper opening / closing device in the above. FIG. 4 is an enlarged view showing a configuration of the resistance plate adjusting device of the above. FIG. 5 is a view showing the operation of the above-described resistance plate adjusting device. FIG. 6 is a diagram showing a relationship between a spring compression length and whiteness rise and spring stress. FIG. 7 is a partially broken sectional view showing a conventional resistance plate adjusting device. [Description of Signs] 1 Outer frame 2 Bearing 3 Bearing 4 Main shaft 4a Hollow portion 5 Blow hole 6 Stirring roll 7 Bran wire mesh 8 Wire mesh support 9 Refining room 10 Dust collection chamber 11 Dust collection hopper 12 Dust collection duct 13 Discharge ring 14 Discharge port 15 Resistance plate 16 Support arm 17 Rotating shaft 18 Balance arm 19 One of balance arms 20 Biasing device 21 The other of balance arms 22 Biasing adjustment device 23 Reversible motor Table 24 Fixed base 25 Bracket 26 Support bracket 27 Shaft 28 Drive shaft 29 Screw 30 Guide 31 Moving pedestal 32 Spring with small elastic coefficient 33 Spring with large elastic coefficient 34 Pressing member 35 Movable pin 36 Discharge hopper 37 Screw roll 37a Screw Mountain 38 Supply port 39 Funnel table 40 Circular hole 41 Supply gutter 42 Supply hopper 43 Slide plate 44 Supply hopper wall 45 Closing plate 46 Air blower 47 Inlet 4 Exhaust outlet 49 Atsumarinuka duct 50 motor 51 motor 52 ring 53 urging the shaft 54 closing plate 100 lever - 101 joint 102 resistance plate 103 compression coil spring 104 Habo 105 A - arm 106 discharge gutter 107 compression coil spring 108 compression coil spring

Claims (1)

(57) Patent Claims 1. A to rotatably Jikuka the spindle to bran removing polished cylinder having a porous wall and JikuSo helical trochanter and milling rotor the bran removing milling tube A gap between the milling trochanter is defined as a milling chamber, a grain outlet at the end of the milling chamber, a grain inlet at the same starting end,
In a grain mill provided with a resistance plate adjusting device for urging the discharge port with a resistance plate, the resistance plate control device is provided with one end of a balance arm provided near the grain discharge port. A biasing device having a plate and a biasing adjustment device connected to the other end thereof. The biasing adjustment device includes a spring having a relatively small elastic modulus and a spring having a relatively large elastic modulus connected on a coaxial line. And a screw rod directly connected to the rotation shaft of the rotation drive device is attached to the balance arm.
Is disposed so as to face the other end of the screw rod, and extends in parallel with the screw rod.
The movable pedestal whose rotation has been prevented by the guide is
Screw the tip of the screw rod into the other end of the balance arm.
The spring member is penetrated into the pressed pressing member and
The screw is loosely fitted in the pressing member, and the pressing member and the movable pedestal are
These two springs are interposed between them, and
A fixed base on which the driving device is fixedly fixes the rotary driving device.
Bracket and support for rotatably supporting the bracket
A bracket, wherein the urging adjustment device is
A resistance plate adjusting device for a grain mill, wherein a pendulum operation is possible with a bracket as a fulcrum .