JP3618578B2 - Rice mill adjustment device for rice mill - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a simple rice milling machine used in general households and the like, and more particularly to a rice mill adjusting device.
[0002]
[Prior art]
In a rice milling machine that uses the friction between brown rice inside the rice milling screen, a rice mill adjusting device is provided to adjust the degree of rice milling (white rice, 5 minutes, 3 minutes, etc.). A conventional rice milling adjustment device closes the discharge port of a cylindrical rice milling screen installed horizontally in the rice milling chamber with a resistance plate to which the required pressing force is applied, and engages the adjustment member of the resistance plate. The adjustment cam is rotated from the outside to expand and contract the coil spring to adjust the pressing force acting on the resistance plate.
[0003]
As an example of such a rice milling adjustment device, the one disclosed in Japanese Utility Model Publication No. 57-76847 discloses that the rotation shaft of the adjustment cam is installed horizontally in the front-rear direction of the rice milling machine. The front end protrudes from the front of the casing of the rice mill, and an adjustment dial is attached to this so that it can be operated from the outside.
[0004]
However, according to such a configuration, since the adjustment dial is operated on the front surface of the casing, there is a problem in operability because the position of the adjustment dial and the height of the eyes of the user is difficult to match.
[0005]
On the other hand, as shown in FIG. 10, the adjustment dial 82 is provided on the inclined surface 81a at the upper front of the casing 81 of the rice mill so that the adjustment dial can be easily seen by making the position of the adjustment dial face the user's face. There are also known rice milling adjustment devices.
[0006]
In this rice milling adjustment device, a U-shaped fixed frame 84 is attached to the upper part of the rice mill 83 in an inclined state, and a forwardly inclined guide bar 85 fixed to the fixed frame 84 is projected to the front surface of the fixed frame 84. The upper end of the adjustment member 86 is fitted to the front end portion of the protruding guide rod 85. The adjusting member 86 is attached by a hinge portion 87 so as to be swingable in the front-rear direction. A resistance plate 88 is attached to the lower end of the adjustment member 86, and the resistance plate 88 closes the discharge port 90 at the front end of the rice milling screen 89.
[0007]
The front end of the coil spring 91 extrapolated to the guide rod 85 is pressed against the upper end portion of the adjustment member 86, and the rear end is brought into contact with the slider 92 extrapolated to the guide rod 85. The adjustment cam 93 is pressed against a part of the slider 92. The adjustment cam 93 is fixed to the lower end portion of the rotation shaft 94 attached to the fixed frame 84 with a forward tilt angle. An adjustment dial 82 is attached to the upper end of the rotation shaft 94 on the inclined surface 81 a of the casing 81.
[0008]
When the adjustment dial 82 is turned, the adjustment cam 93 pushes the slider 92, compresses the coil spring 91, increases the force acting on the upper end of the adjustment member 86, and increases the pressing force of the resistance plate 88. . Conversely, when the slider 92 is retracted, the pressing force of the resistance plate 88 decreases. The degree of milling is adjusted by the magnitude of the pressing force of the resistance plate 88.
[0009]
[Problems to be solved by the invention]
The above-mentioned rice milling adjustment apparatus has an excellent operability because the adjustment dial 82 is provided at a position that is easy to see from the user. However, since the fixed frame 84 is attached in a forward inclined state, The gap A between the two and the gap B in the upper part of the front half of the fixed frame 84 become useless spaces. Further, since the adjustment member 86 requires the hinge portion 87, there is a problem that the structure becomes complicated.
[0010]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a rice mill adjusting device that has little waste of installation space, does not require a hinge portion, and is excellent in operability.
[0011]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention applies a required pressing force to a resistance plate that closes a discharge port of a cylindrical rice milling screen installed horizontally in the rice milling chamber of the rice milling machine body, Rice milling adjustment of a rice milling machine that engages an adjusting cam with an adjusting member holding a resistance plate and rotates the adjusting cam from outside to adjust the pressing force of the resistance plate by moving the adjusting member back and forth. In the apparatus, a slider capable of moving back and forth with respect to the adjustment member is attached to a fixed frame, and the adjustment member is urged rearward between the adjustment member and the slider to apply a pressing force to the resistance plate. A first elastic member is interposed, a second elastic member for biasing the slider backward is interposed between the adjustment member and the fixing member, and an outer peripheral cam surface of the adjustment cam is brought into contact with the slider. Biasing force of the second elastic member Receiving, forming a rice milling adjustment area with a gradually increasing radius on the outer peripheral cam surface, and when the minimum radius portion of the outer peripheral cam surface abuts, the pressing force of the resistance plate is set to be the largest, and the maximum radius portion abuts Sometimes it is set to the smallest.
[0012]
It is possible to adopt a configuration in which a forward tilt angle is given to the rotation shaft of the adjustment cam, a tilt angle is given to the outer peripheral cam surface, and the outer peripheral cam surface is in line contact with a part of the slider. .
[0013]
In addition, a cleaning unit that rises from a portion of the adjustment cam that exceeds the rice milling adjustment area through a sudden increase portion where the radius suddenly increases from a portion of the maximum radius of the rice milling adjustment region is provided. It is possible to adopt a configuration in which the resistance plate is forcibly moved away from the discharge port of the rice milling roll and a cleaning gap is formed between the resistance plate and the discharge port.
[0014]
Further, in the middle of rotating the adjustment cam in a direction in which the pressing force of the resistance plate decreases, an engagement portion that engages the slider when the sudden increase portion contacts the slider is provided on the adjustment member, While the contact between the slider and the adjustment cam reaches the cleaning portion from the sudden increase portion, the slider forcibly advances the adjustment member, and a cleaning gap is formed between the discharge port of the rice milling screen and the resistance plate. The structure to form can be taken.
[0015]
An adjustment dial is attached to the rotation shaft of the adjustment cam, and a milling adjustment display corresponding to the milling adjustment area of the adjustment cam and a cleaning display corresponding to the cleaning unit are provided at the position indicated by the adjustment dial. It may be.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings. First, the entire rice mill will be described with reference to FIGS.
[0017]
As shown in these drawings, the rice mill is provided with a base 12 at the bottom of the casing 11, a motor 13 is installed therein, and a bearing 15 of the rice mill main body 14 is fixed on the base 12. . A main shaft 16 is rotatably supported by the bearing portion 15 in the horizontal direction, and the rotation of the motor 13 is transmitted to the main shaft 16 (see FIG. 2) by a belt 17 and a pulley 18.
[0018]
A brown rice supply unit 19 is provided in front of the bearing portion 15 of the rice milling machine main body 14, and the brown rice supply unit 19 communicates with a hopper 21 of the casing 11. Further, a rice milling chamber 22 communicating with this is provided in front of the brown rice supply unit 19. The lower end of the rice milling chamber 22 is opened to become a bran discharge port 23, and the front end of the rice milling chamber 22 is also opened, and a screen pressing plate 24 is detachably fixed to the front end opening portion.
[0019]
A fine roll 26 is provided coaxially and integrally with the front portion of the main shaft 16. The milling roll 26 is provided with a rice feed section 27 on the main shaft 16 side by a small pitch feed spiral, and a rice mill section 27 ′ is provided at the front end of the rice feed section 27 by a large pitch reverse feed spiral.
[0020]
In the rice milling chamber 22, a hexagonal cylindrical rice milling screen 28 is fitted around the milling roll 26 with a predetermined gap. The rear end of the rice milling screen 28 is opened toward the brown rice supply unit 19. The front end portion of the rice milling screen 28 is inserted and locked in a hexagonal locking hole 31 provided in the screen pressing plate 24.
[0021]
The discharge port 30 of the rice milling screen 28 inserted into the locking hole 31 is closed so that a disc-shaped resistor plate 32 can be contacted and separated. The resistor plate 32 is supported by a support arm 33 extending upward. Further, the upper end portion of the support arm 33 is connected to the front end surface of the adjustment plate 34 bent in an L shape by a pin 29.
[0022]
A white rice discharge chute 38 surrounding the discharge port 30 of the rice milling screen 28, the resistance plate 32 and the support arm 33 is detachably attached to the screen pressing plate 24.
[0023]
Below the rice milling machine main body 14, a pair of left and right bran receiving cases 39 and a white rice receiving case 40 are accommodated on the bottom surface of the casing 11 so as to be freely inserted and removed from the front of the casing 11, and the bran discharge port 23 is on the bran receiving case 39. The white rice discharge chute 38 faces the white rice receiving case 40.
[0024]
A rice mill adjusting device 35 is provided above the rice milling chamber 22 of the rice milling machine body 14. Details of the rice mill adjusting device 35 are as shown in FIGS. That is, the rice mill adjusting device 35 has a fixed frame 42 fixed to the rice mill main body 14. The fixed frame 42 is provided with a rear support portion 44 by bending the rear end portion of the horizontal fixing portion 43 upward, and is provided with a front support portion 45 by bending the front end portion upward. Further, an upper end of the front support portion 45 is bent backward, and an inclined mounting portion 46 having a certain angle is provided.
[0025]
A guide rod 47 is attached horizontally between the support portions 44 and 45 in the front-rear direction. Further, a slit 48 in the left-right direction is provided at the lower end of the front support portion 45 (see FIG. 5), and the adjusting plate 34 is inserted through the slit 48. A guide portion 49 is provided by bending the rear end portion of the adjustment plate 34 upward, and the guide portion 49 is slidably fitted to the guide rod 47 inside the rear support portion 44. Further, a guide auxiliary portion 49 ′ is formed in the middle of the adjustment plate 34 by being raised upward, and the guide auxiliary portion 49 ′ is also slidably fitted to the guide rod 47. The guide portion 49 and the guide auxiliary portion 49 ′ guide the movement in the front-rear direction while the adjustment plate 34 is kept horizontal, and the rotation of the slit 48 is prevented.
[0026]
The slider 51 is attached to the guide rod 47 so as to be slidable in the front-rear direction. The slider 51 is bent in a downward U-shape, and the rear end bent portion 52 and the front end bent portion 53 are inserted into the guide rod 47, and the rear end bent portion 52 and the guide portion 49 are interposed between them. The first coil spring 54 is interposed between the front end bent portion 53 and the front support portion 45, and the second coil spring 55 is interposed between the first coil spring 54 and the front support portion 45. Further, a cam contact portion 56 is formed by cutting and raising at the upper end of the front end bent portion 53 of the slider 51, the adjustment cam 57 is pressed against the rearward surface of the cam contact portion 56, the position of the slider 51 is determined by the adjustment cam 57, The expansion / contraction amount of the first coil spring 54 is adjusted according to the position. The second coil spring 55 functions to press the cam contact portion 56 of the slider 51 against the adjustment cam 57.
[0027]
The adjustment dial 61 is inserted into the upper end portion of the rotation shaft 58 of the adjustment cam 57 from the front inclined portion 11a of the casing 11.
[0028]
The adjustment cam 57 is attached to the lower end portion of the rotation shaft 58 attached to the inclination attachment portion 46 of the fixed frame 42 with a forward inclination angle α (see FIG. 6A), and the outer peripheral cam surface 59 is the above-described cam surface 59. It is pressed against the cam abutting portion 56. The outer peripheral cam surface 59 is provided with an inclination angle β so as to be in line contact with the vertical cam contact portion 56.
[0029]
As shown in FIG. 6 (b), the outer peripheral cam surface 59 has a rice milling adjustment area a in which the radius gradually increases from a minimum radius portion in a certain circumferential direction within a range not exceeding 360 ° around the rotation center. . In a state where the minimum radius portion is in contact with the cam abutting portion 56 (refer to the adjustment cam 57 indicated by symbol (A) in FIG. 6C), the slider 51 is most retracted (a state closest to the guide portion 49). To do. Therefore, the first coil spring 54 is compressed most. Corresponding to the minimum radius portion of the polished rice area a that brings about such a state, “white rice” is displayed on the surface of the front inclined portion 11a pointed to by the tip of the knob 62 of the adjustment dial 61 (FIG. 6D). )reference).
[0030]
Further, in a state where the maximum radius portion is in contact with the cam abutting portion 56, the slider 51 is in the most advanced state contrary to the above (see the adjustment cam 57 indicated by the symbol (b) in FIG. 6C), The amount of compression of one coil spring 54 is minimized. “3 minutes” is displayed at the position indicated by the tip of the knob 62 of the adjustment dial 61 corresponding to the maximum radius portion of the rice milling area a that brings about such a state. Then, a display of “5 minutes” is provided at a substantially middle portion between the above “white rice” and “3 minutes”.
[0031]
With the above configuration, when the user sets the degree of milling with the adjustment dial 61, the first coil spring 54 is expanded and contracted according to the setting degree, and the pressing force is applied to the adjustment plate 34 via the support arm 33. The resistance plate 32 is transmitted to the resistance plate 32, and the resistance plate 32 closes the discharge port 30 of the rice milling screen 28 with the above pressing force. As a result, the rice polished at a predetermined degree of polished rice (white rice, 5 minutes, 3 minutes) is discharged from the discharge port 30.
[0032]
When the milling is completed as described above, the unmilled rice remains in the milling screen 28. Such unmilled rice is called residual rice. The remaining rice may be left until the next rice milling, but in the case of adding a function of simply discharging so-called cleaning, as shown by a two-dot chain line in FIG. A cleaning portion 64 is provided which rises in the radial direction from a maximum radius portion of the outer peripheral cam surface 59 via a sudden increase portion 63 in which the radius suddenly increases. Then, as a display indicated by the knob 62 of the adjustment cam 57, “cleaning” is displayed at a portion where the rotation angle is further advanced than “3 minutes” (see FIG. 7B).
[0033]
When the adjustment cam 57 is moved to the “cleaning” display beyond the “3 minutes” display, the slider 51 is pushed forward by the cleaning portion 64 of the adjustment cam 57 (moves toward the front support portion 45 side). And the second coil spring 55 is compressed to the maximum. As a result, the gap between the rear bent portion 52 of the slider 51 and the guide portion 49 of the adjustment plate 34 is widened, and the interval becomes larger than the natural length of the first coil spring 54, so that no spring force is exerted on the adjustment plate 34. Since the adjustment plate 34 cannot be moved by this, the engaging portion 65 formed by cutting and raising the adjustment plate 34 is provided in front of the front end bent portion 53 of the slider 51.
[0034]
As shown in FIG. 7A, the position of the engaging portion 65 is such that when the adjustment cam 57 is in a state of being divided by 3 minutes, the front end bent portion 53 has a gap e behind the engaging portion 65. The adjustment cam 57 is further rotated and passes through the sudden increase portion 63, and the cleaning portion 64 is in contact with the cam abutting portion 56 of the slider 51. The position is set so as to engage with the rear surface of the portion 65.
[0035]
When the front end bent portion 53 is engaged with the rear surface of the engaging portion 65, the adjustment plate 34 is forcibly advanced, and the resistance plate 32 is released from the outlet 30 of the rice milling screen 28 as shown in FIG. A predetermined cleaning gap d is generated between them.
[0036]
When the motor 13 is driven for a while after providing such a cleaning gap d, the remaining rice is discharged from the discharge port 30 by the milling roll 26 and cleaning is performed. After the cleaning is completed, the adjustment cam 57 is returned to the original state to eliminate the cleaning gap d.
[0037]
8 and 9 show a rotation operation mechanism of the adjustment cam 57. FIG. The cam base 66 that attaches the pivot shaft 58 of the adjusting cam 57 to the inclined mounting portion 46 of the fixed frame 42 is fixed to the hole 68 of the inclined mounting portion 46 by a screw 67 so that the shaft hole 69 is matched. A notch-shaped groove 70 is provided around the shaft hole 69, and a spring mounting recess 71 is provided between the groove 70 and one screw 67, and a leaf spring 72 bent in a waveform is provided as a shaft. It sticks out in the direction of the hole 69.
[0038]
The rotating shaft 58 of the adjusting cam 57 is inserted into the shaft hole 69, and a gear 73 is externally inserted on the rotating shaft 58 above the cam base 66 and integrated by a pin 74. A protrusion 75 provided on the lower surface of the gear 73 is fitted into the groove 70 to limit the rotation angle of the gear 73. Further, the bent portion of the leaf spring 72 slightly falls between the teeth of the gear 73. When the adjustment dial 61 is turned, the leaf spring 72 falls between the teeth one by one, and the posture of the adjustment cam 57 is changed. It can be rotated by a predetermined angle while being stabilized.
[0039]
【The invention's effect】
As described above, according to the present invention, since the fixed frame of the rice milling apparatus is mounted horizontally in the upper part of the rice milling chamber, there is no waste of installation space, and the adjustment member does not require a hinge part, so the structure is simple. Furthermore, since the rotation shaft of the adjustment cam is inclined forward and the adjustment dial is attached to the front inclined portion of the casing, the operability is good.
[Brief description of the drawings]
FIG. 1 is a partial perspective view of an embodiment of a rice milling machine. FIG. 2 is a front view of the same. FIG. 3 is a sectional view of the same. FIG. [FIG. 6] (a) Schematic diagram of the adjustment cam portion (b) Same as above (b) Front view of the same adjustment cam (c) Plan view of the adjustment cam portion (d) Same adjustment FIG. 7A is a plan view of an adjustment cam portion of a modification. FIG. 8B is a plan view of the adjustment dial portion of the same. FIG. 8A is a cross-sectional view of an adjustment cam operation portion of the embodiment. b) Cross-sectional view taken along line bb in FIG. 9 (a). FIG. 9 is an exploded perspective view of the portion in FIG. 8. FIG. 10 is a partial cross-sectional view of a conventional rice milling apparatus.
DESCRIPTION OF SYMBOLS 11 Casing 11a Front inclined part 12 Base 13 Motor 14 Rice mill main body 15 Bearing part 16 Main shaft 17 Belt 18 Pulley 19 Brown rice supply part 21 Hopper 22 Rice milling room 23 Bran discharge port 24 Screen presser plate 26 Milling roll 27 Rice feeding part 27 ' Milling roll 28 Rice milling screen 29 Pin 30 Discharge port 31 Locking hole 32 Resistance plate 33 Supporting arm 34 Adjusting plate 35 Rice milling adjustment device 38 White rice discharge chute 39 Bran rice receiving case 40 White rice receiving case 42 Fixed frame 43 Horizontal fixing portion 44 Rear support portion 45 Front support portion 46 Inclined mounting portion 47 Guide rod 48 Slit 49 Guide portion 49 ′ Guide auxiliary portion 51 Slider 52 Rear bent portion 53 Front bent portion 54 First coil spring 55 Second coil spring 56 Cam contact portion 57 Adjustment cam 58 Rotating shaft 59 Outer cam surface 61 Adjustment diamond 62 Picking knob 63 Rapid increase portion 64 Cleaning portion 65 Engaging portion 66 Cam base 67 Screw 68 Hole 69 Shaft hole 70 Groove 71 Spring mounting recess 72 Leaf spring 73 Gear 74 Pin 75 Projection

Claims (4)

The required pressing force is applied to the resistance plate that closes the discharge port of the cylindrical rice screen installed horizontally inside the rice milling machine body, and the adjustment cam is engaged with the adjustment member that holds the resistance plate. In the rice mill adjusting device of a rice milling machine, the adjusting cam is rotated from the outside to adjust the pressing force of the resistance plate by moving the adjusting member back and forth, and can be moved back and forth with respect to the adjusting member. A simple slider is attached to the fixed frame, and a first elastic member is provided between the adjusting member and the slider to urge the adjusting member rearward to apply a pressing force to the resistance plate, and is fixed to the adjusting member. A second elastic member for urging the slider backward between the member and the outer cam surface of the adjustment cam against the slider to receive the urging force of the second elastic member; Radius gradually increases on outer cam surface Forming a rice adjustment region shape, the pressing force of the resistance plate when the minimum radius portion of the outer circumferential cam surface abuts is largest set, is smallest set when the maximum radius portion abuts, the adjustment cam A rice mill adjusting device for a rice milling machine characterized in that a forward tilt angle is given to the rotation shaft, a tilt angle is given to the outer peripheral cam surface, and the outer peripheral cam surface is brought into line contact with a part of the slider. . A cleaning part that rises from a maximum radius part of the rice milling adjustment area through a rapidly increasing part is provided at a part of the adjustment cam beyond the rice milling adjustment area, and the adjustment member is advanced by the cleaning part. Te away from forced outlet of the milled rice roll the resistive plate, milled rice rice mill according to claim 1, characterized in that so as to form a cleaning gap between the resistive plate and the outlet Adjustment device. In the middle of rotating the adjustment cam in the direction in which the pressing force of the resistance plate decreases, an engagement portion that engages the slider when the sudden increase portion contacts the slider is provided in the adjustment member, and the slider The slider forcibly advances the adjusting member while the contact between the adjusting cam and the adjusting cam reaches the cleaning portion, thereby forming a cleaning gap between the discharge port of the rice milling screen and the resistance plate. A rice mill adjusting device for a rice mill according to claim 2 . An adjustment dial is attached to the rotating shaft of the adjustment cam, and a rice mill adjustment display corresponding to the rice adjustment area of the adjustment cam and a cleaning display corresponding to the cleaning unit are provided at the position indicated by the adjustment dial. A rice mill adjusting device for a rice mill according to claim 2 or 3 , characterized in that:

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