JP2012100794A - Automatic bread maker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic bread maker for precisely detecting abnormality of motors.SOLUTION: The automatic bread maker includes: a pulverizing motor 60 for applying rotary power to a driving shaft; a power supply part 121a for supplying power for driving the pulverizing motor 60; a power supply state detection circuit 125 for detecting the state of the power supply part 121a; and a controller 120 for detecting abnormality of the pulverizing motor 60. The controller 120 uses a reference which can differ depending on the state of the power supply part 121a to detect abnormality of the pulverizing motor 60.

Description

  The present invention relates to an automatic bread maker mainly used in general households.

  A commercially available automatic bread maker for home use generally has a mechanism for producing bread by directly using a bread container into which bread ingredients are placed (see, for example, Patent Document 1). In such an automatic bread maker, first, a bread container containing bread ingredients is placed in a baking chamber in the main body. And the bread raw material in a bread container is kneaded into bread dough with the kneading blade provided in a bread container (kneading process). Thereafter, a fermentation process for fermenting the kneaded bread dough is performed, and the bread container is used as a baking mold to bake the bread (baking process).

  When bread is manufactured using such an automatic bread maker, so far, flour (wheat flour, rice flour, etc.) or flour such as wheat or rice is used as the raw material for bread. It was necessary to have a mixed powder in which various auxiliary materials were mixed. However, in general households, as represented by rice grains, grains are sometimes held in the form of grains instead of in the form of flour. For this reason, it would be very convenient if the automatic bread maker had a mechanism for producing bread directly from grains. With this in mind, the present applicants have developed a bread production method for producing bread using cereal grains as a starting material (see Patent Document 2).

  In this bread manufacturing method, first, cereal grains and a liquid are mixed, and a pulverizing blade is rotated in the mixture to pulverize the cereal grains (grinding step). And the bread raw material containing the paste-form ground powder obtained through the grinding process is kneaded into bread dough using a kneading blade (kneading process). Thereafter, a fermentation process for fermenting the kneaded bread dough is performed, followed by a baking process for baking the bread.

JP 2000-116526 A JP 2010-35476 A

  The automatic bread maker capable of executing the bread manufacturing method of Patent Document 2 requires a motor for rotating the grinding blade and the kneading blade. Furthermore, in order to increase the safety of such an automatic bread maker or to suppress the occurrence of a failure, a configuration capable of accurately detecting an abnormality of the motor is required.

  Accordingly, an object of the present invention is to provide an automatic bread maker that can accurately detect abnormality of a motor.

  In order to achieve the above object, an automatic bread maker according to the present invention includes an automatic bread maker provided with a motor capable of imparting rotational power to a driving shaft that can be connected to a bread container into which bread ingredients are charged. A power supply means for supplying power for driving the motor, a power supply state detection means for detecting the state of the power supply means, and an abnormality detection means for detecting an abnormality of the motor, The abnormality detection means sets the reference for detecting the abnormality of the motor as being different depending on the detection result of the power supply state detection means.

  According to this configuration, the abnormality detection unit sets a reference according to the state of the power supply unit, and detects a motor abnormality based on the reference. Therefore, it is possible to detect an abnormality of the motor with high accuracy in accordance with the fluctuation of the power supply means.

  In the automatic bread maker configured as described above, the automatic bread maker further includes supply current detection means for detecting the magnitude of the current supplied to the motor, and the abnormality detection means has a threshold value according to the detection result of the power supply state detection means, When the abnormality detection means confirms that the magnitude of the current supplied to the motor is greater than or equal to the threshold based on the detection result of the supply current detection means, the motor is set as the reference. It is good also as detecting abnormality of. According to this configuration, even if an excessive current is generated in the circuit due to the motor being locked or the like, the situation can be detected as abnormal.

  In the automatic bread maker configured as described above, the abnormality detection unit is configured to check a detection result of the supply current detection unit at a predetermined timing, and the abnormality detection unit is continuously performed a predetermined number of times or more. If it is confirmed that the magnitude of the current supplied to the motor is equal to or greater than the threshold value, an abnormality of the motor may be detected. According to this configuration, the abnormality detection unit does not determine that there is an abnormality unless a detection result indicating that a current equal to or greater than the threshold is supplied to the motor is continuously obtained from the supply current detection unit. Therefore, it is possible to suppress the abnormality detection unit from detecting an abnormality and inhibiting the operation of the automatic bread maker until the current supplied to the motor suddenly exceeds the threshold value.

  In the automatic bread maker configured as described above, when the voltage supplied by the power supply means is within a predetermined range, the abnormality detection means may set the threshold value that is larger as the voltage supplied by the power supply means is larger. Good. According to this configuration, a threshold suitable for the power supplied by the power supply means can be set. Therefore, the abnormality detection means can detect the abnormality of the motor with high accuracy.

  Specifically, for example, the abnormality detection means is not confused with the case where the power supply means supplies normal power and the motor has an abnormality when the power supply means supplies less power than normal and the power supply means supplies the normal power. It becomes possible to detect abnormality of the motor. Similarly, the abnormality detection means is not confused with the case where the power supply means supplies normal power and the motor is normal and the power supply means supplies normal power and the motor is normal. It becomes possible not to detect.

  In the automatic bread maker configured as described above, the power supply means supplies AC power, and the abnormality detection means sets the threshold value that can vary depending on the frequency of AC power supplied by the power supply means. May be. According to this configuration, a threshold suitable for the frequency of the AC power supplied by the power supply means can be set. Therefore, the abnormality detection means can detect the abnormality of the motor with high accuracy.

  In the automatic bread maker configured as described above, the motor applies rotational power to the driving shaft when the grain put in the bread container is pulverized by a pulverizing blade interlocked with the driving shaft. It is good. According to this configuration, the abnormality detection means detects an abnormality of the motor that requires the high-speed rotation of the driving shaft and is concerned about locking in order to grind the grain. Therefore, it is possible to effectively increase the safety of the automatic bread maker and effectively suppress the occurrence of failure.

  According to the present invention, it is possible to detect a motor abnormality with high accuracy according to the state of the power supply means. Therefore, the safety of the automatic bread maker can be improved and the occurrence of failure can be suppressed.

The schematic perspective view which shows the external appearance structure of the automatic bread maker of this embodiment The schematic diagram for demonstrating the structure inside the main body of the automatic bread maker of this embodiment. The figure for demonstrating the clutch contained in the 1st power transmission part with which the automatic bread maker of this embodiment is provided. The figure which shows typically the structure of the baking chamber in which the bread container was accommodated, and its periphery in the automatic bread maker of this embodiment. The schematic perspective view which shows the structure of the blade unit with which the automatic bread maker of this embodiment is provided. Schematic exploded perspective view showing a configuration of a blade unit provided in the automatic bread maker of the present embodiment The schematic side view and schematic sectional drawing which show the structure of the blade unit with which the automatic bread maker of this embodiment is provided. Schematic plan view when the blade unit provided in the automatic bread maker of the present embodiment is viewed from below (a diagram when the guard is removed) It is a figure for demonstrating operation | movement of the blade unit with which the automatic bread maker of this embodiment is provided, and a figure at the time of seeing a bread container from the top The block diagram which shows the structure of the automatic bread maker of this embodiment The schematic diagram which shows the flow of the bread-making course for rice grains performed with the automatic bread maker of this embodiment The circuit diagram which shows the motor drive circuit with which the automatic bread maker of this embodiment is provided The flowchart which shows the abnormality detection operation | movement of the grinding | pulverization motor by the control apparatus with which the automatic bread maker of this embodiment is provided.

Hereinafter, embodiments of an automatic bread maker of the present invention will be described in detail with reference to the drawings. In addition, the specific time, temperature, etc. which appear in this specification are illustrations to the last, and they do not limit the content of this invention.
(Configuration of automatic bread maker)
FIG. 1 is a schematic perspective view showing an external configuration of the automatic bread maker according to the present embodiment. As shown in FIG. 1, an operation unit 20 is provided on a part of the upper surface of a main body 10 (the outer shell of which is formed of, for example, metal or synthetic resin) of an automatic bread maker 1 provided in a substantially rectangular parallelepiped shape. It has been. The operation unit 20 includes an operation key group and a display unit that displays time, contents set by the operation key group, errors, and the like. The operation key group includes, for example, a start key, a cancel key, a timer key, a reservation key, a bread manufacturing course (a course for manufacturing bread using rice grains as a starting material, a course for manufacturing bread using rice flour as a starting material) And a selection key for selecting a course for producing bread using flour as a starting material. The display unit is configured by, for example, a liquid crystal display panel.

  Inside the main body 10 is provided a baking chamber 30 in which a bread container 80, which will be described in detail later, is accommodated. The firing chamber 30 is composed of, for example, a bottom wall 30a made of sheet metal and four side walls 30b (see also FIG. 4 described later). The baking chamber 30 has a substantially rectangular box shape in plan view, and its upper surface is open. The firing chamber 30 can be opened and closed by a lid 40 provided on the upper part of the main body 10. The lid 40 is attached to the back side of the main body 10 with a hinge shaft (not shown), and the firing chamber 30 can be opened and closed by rotating about the hinge shaft as a fulcrum. FIG. 1 shows a state where the lid 40 is opened.

  The lid 40 is provided with a viewing window 41 made of, for example, heat-resistant glass so that the inside of the baking chamber 30 can be seen. A bread ingredient storage container 42 is attached to the lid 40. This bread ingredient storage container 42 makes it possible to automatically feed some bread ingredients during the bread production process. The bread raw material storage container 42 includes a box-shaped container body 42a having a substantially rectangular plane shape, and a container lid 42b that is provided so as to be rotatable with respect to the container body 42a and opens and closes the opening of the container body 42a. . Further, the bread ingredient storage container 42 can support the container lid 42b from the outer surface (lower surface) side and maintain the closed state of the opening of the container body 42a, and is moved by an external force to move the container lid 42b to the container lid 42b. There is also provided a movable hook 42c for releasing the engagement.

  An automatic closing solenoid 16 (see FIG. 10 described later) is provided in the main body 10 on the lower side of the operation unit 20, and when the automatic closing solenoid is driven, the plunger wall surface of the main body adjacent to the lid 40. It protrudes from an opening 10b provided in 10a. Then, the movable hook 42c is moved by a movable member (not shown) movable by the protruding plunger, the engagement between the container lid 42b and the movable hook 42c is released, the container lid 42b is rotated, and the container main body 42a. The opening of is opened. Note that FIG. 1 shows a state where the opening of the container main body 42a is opened.

  The container main body 42a and the container lid 42b are preferably provided with a metal such as aluminum so that a powder bread raw material (for example, gluten, dry yeast, etc.) stored in the container does not remain in the container. These surfaces are preferably covered with a coating layer of silicon, fluorine, or the like, and more preferably configured to be covered with an alumite layer. Moreover, it is preferable that the container main body 42a and the container lid 42b are formed as smoothly as possible without being uneven. The same applies to the members on the inner side of the lid 40 (the side on which the bread ingredient storage container 42 is attached), and it is preferable that the base is made of aluminum and the surface is covered with a coating layer such as silicon or fluorine or an alumite layer. .

  Further, if steam generated when pulverizing grains such as rice grains enters the container main body 42a, the bread material tends to adhere to the inner surface of the container, which is not preferable. For this purpose, a flange (flange) is provided at the opening side edge of the container main body 42a so that the aforementioned steam or the like does not enter the container, and a packing is provided between the flange and the container lid 42b. (Seal member) 42d is interposed.

  FIG. 2 is a schematic diagram for explaining the internal configuration of the main body of the automatic bread maker according to the present embodiment. FIG. 2 assumes a case where the automatic bread maker 1 is viewed from above, and the lower side of the figure is the front side of the automatic bread maker 1 and the upper side of the figure is the back side. As shown in FIG. 2, in the automatic bread maker 1, a low-speed / high-torque type kneading motor 50 used in the kneading process is fixedly disposed on the right side of the baking chamber 30, and the grinding process is performed behind the baking chamber 30. The high-speed rotation type crushing motor 60 used in the above is fixedly arranged. The kneading motor 50 and the crushing motor 60 are both shafts. The kneading motor 50 and the crushing motor 60 are examples of the motor of the present invention.

  A first pulley 52 is fixed to an output shaft 51 protruding from the upper surface of the kneading motor 50. The first pulley 52 is connected by a first belt 53 to a second pulley 55 having a diameter larger than that of the first pulley 52 and fixed to the upper side of the first rotating shaft 54. Has been. A second rotating shaft 57 is provided on the lower side of the first rotating shaft 54 so that the center of rotation is substantially the same as the first rotating shaft 54 (see FIG. 3 described later). The first rotating shaft 54 and the second rotating shaft 57 are rotatably supported inside the main body 10. Further, a clutch 56 that performs power transmission and power interruption is provided between the first rotating shaft 54 and the second rotating shaft 57 (see FIG. 3 described later). The configuration of the clutch 56 will be described later.

  A third pulley 58 is fixed to the lower side of the second rotating shaft 57 (see FIG. 3 described later). The third pulley 58 is provided on the lower side of the firing chamber 30 by the second belt 59 and is fixed to the driving shaft 11 and has a first driving shaft pulley 12 (having substantially the same diameter as the third pulley 58). (See FIG. 3 described later). The kneading motor 50 itself is a low speed / high torque type, and the rotation of the first pulley 52 is decelerated and rotated by the second pulley 55 (for example, decelerated to 1/5 speed). For this reason, when the kneading motor 50 is driven in a state where the clutch 56 transmits power, the driving shaft 11 rotates at a low speed.

  In the following, the first pulley 52, the first belt 53, the first rotating shaft 54, the second pulley 55, the clutch 56, the second rotating shaft 57, the third pulley 58, and the second belt 59 are used. , And the first driving shaft pulley 12 may be expressed as a first power transmission unit PT1.

  A fourth pulley 62 is fixed to the output shaft 61 protruding from the lower surface of the grinding motor 60. The fourth pulley 62 is fixed by a third belt 63 below the second driving shaft pulley 13 (below the first driving shaft pulley 12) fixed to the driving shaft 11; 3). The second driving shaft pulley 13 has substantially the same diameter as the fourth pulley 62. As the crushing motor 60, a high-speed rotating one is selected, and the rotation of the fourth pulley 62 is maintained at substantially the same speed in the second driving shaft pulley 13. Therefore, when the crushing motor 60 is driven, the driving shaft 11 is driven. Performs high-speed rotation (for example, 7000 to 8000 rpm).

  In the following, the power transmission unit configured by the fourth pulley 62, the third belt 63, and the second driving shaft pulley 13 may be expressed as a second power transmission unit PT2. The second power transmission unit PT2 has a configuration that does not have a clutch, and connects the output shaft 61 of the crushing motor 60 and the driving shaft 11 so that power can be transmitted constantly.

  FIG. 3 is a view for explaining a clutch included in the first power transmission unit provided in the automatic bread maker of the present embodiment. FIG. 3 is a diagram assuming the case of viewing along the direction of arrow X in FIG. 3A shows a state in which the clutch 56 performs power cut-off, and FIG. 3B shows a state in which the clutch 56 performs power transmission.

  As shown in FIG. 3, the clutch 56 includes a first clutch member 561 and a second clutch member 562. When the claw 561a provided on the first clutch member 561 and the claw 562a provided on the second clutch member 562 are engaged with each other (the state shown in FIG. 3B), the clutch 56 transmits power. In addition, when the two claws 561a and 562a are not engaged with each other (the state shown in FIG. 3A), the clutch 56 cuts off the power. That is, the clutch 56 is a meshing clutch.

  In the present embodiment, each of the two clutch members 561 and 562 has a circumferential direction (when the first clutch member 561 is seen in plan view from below, or the second clutch member 562 is seen in plan view from above. Assuming the case), six claws 561a and 562a arranged at almost equal intervals are provided, but the number of the claws may be appropriately changed. Moreover, what is necessary is just to select a preferable shape suitably for the shape of nail | claw 561a and 562a.

  The first clutch member 561 is attached to the first rotating shaft 54 so as to be slidable in the axial direction (vertical direction in FIG. 3) and not to be relatively rotatable, after taking measures against slipping off. Yes. A spring 71 is loosely fitted on the upper side of the first clutch member 561 of the first rotating shaft 54. The spring 71 is disposed so as to be sandwiched between a stopper portion 54a provided on the first rotating shaft 54 and the first clutch member 561, and biases the first clutch member 561 downward. ing. On the other hand, the second clutch member 562 is fixed to the upper end of the second rotating shaft 57.

  Switching between the power transmission state and the power cut-off state in the clutch 56 is performed using an arm portion 72 that can be selectively arranged at the lower position and the upper position. A part of the arm portion 72 is disposed below the first clutch member 561 and can contact the outer peripheral portion of the first clutch member 561.

  When the arm portion 72 moves from the lower position (the state shown in FIG. 3B) to the upper position (the state shown in FIG. 3A), the first clutch member 561 moves upward against the biasing force of the spring 71. Moving. When the arm portion 72 is in the upper position, the first clutch member 561 and the second clutch member 562 do not mesh with each other. That is, when the arm portion 72 is in the upper position, the clutch 56 performs power interruption.

  On the other hand, when the arm portion 72 moves from the upper position to the lower position, the first clutch member 561 moves downward while being pushed by the urging force of the spring 71. When the arm portion 72 is in the lower position, the first clutch member 561 and the second clutch member 562 are engaged with each other. That is, when the arm portion 72 is in the lower position, the clutch 56 transmits power.

  When the grinding motor 60 is driven, if the clutch 56 is in a state where power is transmitted (the state shown in FIG. 3B), rotational power for rotating the driving shaft 11 at high speed is transmitted to the output shaft 51 of the kneading motor 50. (See FIG. 2). In this case, if the crushing motor 60 is rotated at, for example, 8000 rpm, the output shaft 51 of the kneading motor 50 is rotated at 40000 rpm depending on the radius ratio (for example, 1: 5) between the first pulley 52 and the second pulley 55. The power to make it necessary. As a result, a very large load is applied to the pulverization motor 60, and the pulverization motor 60 may be damaged. For this reason, when driving the grinding motor 60, it is necessary to prevent the rotational power for rotating the driving shaft 11 from being transmitted to the output shaft 51 of the kneading motor 50. Thus, as described above, the automatic bread maker 1 includes the clutch 56 that performs power transmission and power interruption in the first power transmission unit PT1.

  As described above, in the automatic bread maker 1, the second power transmission unit PT2 is not provided with a clutch. This is due to the following reason. That is, even if the kneading motor 50 is driven, the driving shaft 11 is only rotated at a low speed (for example, 180 rpm). For this reason, even if the rotational power for rotating the driving shaft 11 is transmitted to the output shaft of the crushing motor 60, a large load is not applied to the kneading motor 50. And the manufacturing cost of the automatic bread maker 1 is suppressed by adopting the structure in which the clutch is not provided in the second power transmission part PT2 in this way. However, it goes without saying that a configuration in which a clutch is provided in the second power transmission unit PT2 may be adopted.

  FIG. 4 is a diagram schematically showing the configuration of the baking chamber in which the bread container is accommodated and its surroundings in the automatic bread maker of the present embodiment. FIG. 4 assumes a configuration when the automatic bread maker 1 is viewed from the front side, and the configurations of the baking chamber 30 and the bread container 80 are generally shown in cross-sectional views. In addition, the bread container 80 used as a baking mold while the bread raw material is input can be taken in and out of the baking chamber 30.

  As shown in FIG. 4, a sheathed heater 31 is disposed inside the baking chamber 30 so as to surround a bread container 80 accommodated in the baking chamber 30. By using this sheathed heater 31, it is possible to heat the bread ingredients in the bread container 80 (this expression may include bread dough).

  In addition, a bread container support portion 14 (for example, made of an aluminum alloy die-cast molded product) that supports the bread container 80 is fixed to a location corresponding to the approximate center of the bottom wall 30a of the baking chamber 30. The bread container support portion 14 is formed so as to be recessed from the bottom wall 30a of the baking chamber 30, and the shape of the recess is substantially circular when viewed from above. At the center of the bread container support portion 14, the above-described driving shaft 11 is supported so as to be substantially perpendicular to the bottom wall 30a.

  The bread container 80 is, for example, an aluminum alloy die-cast molded product (others may be made of sheet metal or the like), has a bucket-like shape, and is handed to the flange 80a provided on the side edge of the opening. A handle (not shown) is attached. The horizontal cross section of the bread container 80 is a rectangle with rounded corners. Further, a concave portion 81 having a substantially circular shape in a plan view is formed on the bottom of the bread container 80 so as to accommodate a part of a blade unit 90 which will be described in detail later.

  A blade rotation shaft 82 extending in the vertical direction is supported at the center of the bottom of the bread container 80 so as to be rotatable in a state where a countermeasure against sealing is taken. A container side coupling member 82a is fixed to the lower end of the blade rotation shaft 82 (projecting outward from the bottom of the bread container 80). In addition, a cylindrical pedestal 83 is provided on the bottom outer surface side of the bread container 80, and the bread container 80 is accommodated in the baking chamber 30 in a state where the pedestal 83 is received by the bread container support part 14. It has become so. The pedestal 83 may be formed separately from the bread container 80 or may be formed integrally with the bread container 80.

  When the pedestal 83 of the bread container 80 is received in the baking chamber 30 in a state of being received by the bread container support portion 14, the container-side coupling member 82 a provided at the lower end of the blade rotation shaft 82 and the driving shaft 11. The coupling (coupling) with the driving shaft side coupling member 11a fixed to the upper end of the shaft can be obtained. As a result, the blade rotation shaft 82 can transmit the rotational power from the driving shaft 11.

  A blade unit 90 is detachably attached to a portion of the blade rotation shaft 82 that protrudes into the bread container 80 from above. The configuration of the blade unit 90 will be described with reference to FIGS. FIG. 5 is a schematic perspective view showing the configuration of the blade unit provided in the automatic bread maker of the present embodiment. FIG. 6 is a schematic exploded perspective view showing a configuration of a blade unit provided in the automatic bread maker of the present embodiment. FIG. 7 is a diagram showing a configuration of a blade unit included in the automatic bread maker of the present embodiment, FIG. 7 (a) is a schematic side view, and FIG. 7 (b) is the AA position in FIG. 7 (a). It is sectional drawing. FIG. 8 is a schematic plan view of the blade unit included in the automatic bread maker according to the present embodiment when viewed from below. FIG. 8A is a diagram when the kneading blade is in a folded position, and FIG. FIG. 4 is a view when the kneading blade is in an open posture. FIG. 8 shows a state in which a guard to be described later is removed. FIG. 9 is a view for explaining the operation of the blade unit provided in the automatic bread maker of the present embodiment, and is a view when the bread container is viewed from above. FIG. 9A is a view when the kneading blade is in the folded position, and FIG. 9B is a view when the kneading blade is in the open position.

  The blade unit 90 is roughly divided into a unit shaft 91, a crushing blade 92 attached to the unit shaft 91 so as not to rotate relative to the unit shaft 91, and a plan view attached to the unit shaft 91 so as to be relatively rotatable and covering the crushing blade 92. A substantially circular dome-shaped cover 93 and a kneading blade 101 attached to the dome-shaped cover 93 so as to be relatively rotatable are configured (see, for example, FIGS. 5 to 7). In a state where the blade unit 90 is attached to the blade rotation shaft 82, the crushing blade 92 is positioned slightly above the bottom surface of the recess 81 of the bread container 80. Further, almost the entire grinding blade 92 and the dome-shaped cover 93 are accommodated in the recess 81.

  The unit shaft 91 is a substantially columnar member formed of a metal such as a stainless steel plate, for example, and has an opening at one end (the lower end in FIGS. 6 and 7), and the inside is hollow. That is, the insertion shaft 91c is formed in the unit shaft 91 (see FIG. 7B). In addition, a pair of notches 91a are formed on the lower side (opening side) of the side wall of the unit shaft 91 so as to be symmetrically arranged with respect to the rotation center of the unit shaft 91 (see, for example, FIG. 6). 6 shows only one of them). When the unit shaft 91 is put on the blade rotation shaft 82, a pin 821 (see FIG. 7) that penetrates the blade rotation shaft 82 horizontally engages with the notch 91 a, and the unit shaft 91 is attached to the blade rotation shaft 82. It is attached so that it cannot rotate relative to it.

  As shown in FIG. 7B, the upper portion of the unit shaft 91 is engaged with a convex portion 82b provided at the central portion of the upper surface (substantially circular) of the blade rotation shaft 82 (shown by a broken line). A concave portion 91b is formed in the central portion of the side inner surface. Accordingly, the blade unit 90 can be easily attached to the blade rotation shaft 82 in a state where the centers of the unit shaft 91 and the blade rotation shaft 82 are aligned. For this reason, unnecessary rattling during rotation of the blade is suppressed. In the present embodiment, the convex portion 82b is provided on the blade rotating shaft 82 side and the concave portion 91b is provided on the unit shaft 91 side, but conversely, the concave portion is provided on the blade rotating shaft 82 side and the unit shaft 91 side is provided. A configuration in which a convex portion is provided may be employed.

  The pulverizing blade 92 for pulverizing grains is formed of, for example, a stainless steel plate, and the shape thereof is, for example, an airplane propeller. As shown in FIG. 6, an opening 923 a having a substantially rectangular shape in plan view is formed at the center of the crushing blade 92. The crushing blade 92 is attached from the lower side of the unit shaft 91 so that the unit shaft 91 is fitted into the opening 923a.

  The lower side of the unit shaft 91 has a shape that is obtained by scraping the side surface of a cylinder, and is substantially the same shape (substantially rectangular shape) as the opening 923a of the grinding blade 92 when viewed from below. The area when the lower side of the unit shaft 91 is viewed from below is slightly smaller than the opening 923a. Since such a shape is adopted, the grinding blade 92 is attached to the unit shaft 91 so as not to be relatively rotatable. Since the stopper member 94 for preventing the retaining member 94 is fitted into the unit shaft 91 on the lower side of the pulverizing blade 92, the pulverizing blade 92 does not fall off the unit shaft 91.

  The dome-shaped cover 93 disposed so as to surround and cover the crushing blade 92 is made of, for example, an aluminum alloy die-cast product, and a bearing 95 (in this embodiment, a rolling bearing is used on the inner surface side thereof. ) (See FIG. 7B) is formed. In other words, in order to form the accommodating portion 931, the dome-shaped cover 93 has a configuration in which a substantially cylindrical convex portion 93a is formed at the center when viewed from the outer surface. In addition, the opening is not formed in the convex part 93a, and the bearing 95 accommodated in the accommodating part 931 is in the state in which the side surface and the upper surface are enclosed by the wall surface of the accommodating part 931.

  The inner ring 95a is attached to the unit shaft 91 so as not to rotate relative to the bearing 95 with the retaining rings 96a and 96b arranged on the upper and lower sides (the unit shaft 91 is press-fitted into a through hole inside the inner ring 95a. ing). The bearing 95 is press-fitted into the housing portion 931 so that the outer wall of the outer ring 95b is fixed to the side wall of the housing portion 931. The dome-shaped cover 93 is attached to the unit shaft 91 so as to be rotatable relative to the bearing 95 (the inner ring 95a rotates relative to the outer ring 95b).

  In addition, the housing portion 931 of the dome-shaped cover 93 is made of, for example, a silicon-based material so that foreign matter (for example, liquid used when pulverizing grain grains or paste-like material obtained by pulverization) does not enter the bearing 95 from the outside. Alternatively, a seal material 97 formed of a fluorine-based material and a metal seal cover 98 that holds the seal material 97 are press-fitted from the lower side of the bearing 95. The seal cover 98 is fixed to the dome-shaped cover 93 with a rivet 99 so that the fixing to the dome-shaped cover 93 is ensured. Although fixing with the rivet 99 may not be performed, it is preferable to configure as in the present embodiment in order to obtain reliable fixing. The sealing material 97 and the sealing cover 98 function as sealing means. The seal cover 98 is preferably coated with fluorine or the like. In particular, it is preferable to use a silver paint because the coating is difficult to peel off and even if it is peeled off, it is difficult to stand out.

  On the outer surface of the dome-shaped cover 93, a kneading blade 101 (for example, aluminum) in a planar shape is formed by a support shaft 100 (see FIG. 6) disposed so as to extend in a vertical direction at a location adjacent to the convex portion 93 a. (Made of die-cast alloy product) is attached. The kneading blade 101 is attached to the support shaft 100 so as not to be relatively rotatable, and moves together with the support shaft 100 attached to the dome-shaped cover 93 so as to be relatively rotatable. In other words, the kneading blade 101 is attached to the dome-shaped cover 93 so as to be relatively rotatable.

  On one surface near the tip of the kneading blade 101 (assuming a portion that draws the largest circle when the kneading blade 101 is rotated about the support shaft 100), a cushioning material 107 as shown in FIGS. It is attached. The buffer material 107 is provided so as to slightly protrude from the tip of the kneading blade 101 (see, for example, FIG. 9B).

  The buffer material 107 is fixed in a state where the buffer material 107 is sandwiched between one surface of the kneading blade 101 and the fixing plate 108 and obtained by caulking the rivet 109 inserted from the other surface side of the kneading blade 101. ing. In the present embodiment, the number of rivets 109 is two, but it goes without saying that the number is not limited.

  The cushioning material 107 is disposed so as not to come into direct contact with the bread container 80 (inner wall thereof) when the kneading blade 101 is in the open posture described in detail later. When the kneading blade 101 and the bread container 80 are in direct contact with each other, damage may occur due to interference between them, and the buffer material 107 is provided to prevent such damage.

  In the automatic bread maker 1 of this embodiment, the surface of the bread container 80 and the kneading blade 101 is coated with fluorine. For this reason, it can be said that the buffer material 107 of the present embodiment is provided so that the fluorine coating is not peeled off by contact between the kneading blade 101 and the pan container 80. From this point, the material constituting the cushioning material 107 is preferably a material softer than the coating material so as not to peel off the fluorine coating. For example, silicone rubber or TPE (Thermoplastic Elastomers) is used. . The buffer material 107 also functions as a soundproofing measure, which will be described later. In the following description, the buffer material 107 may be regarded as a part of the kneading blade 101.

  Further, in the present embodiment, a complementary kneading blade 102 (for example, made of an aluminum alloy die cast product) is fixedly disposed on the outer surface of the dome-shaped cover 93 so as to be aligned with the kneading blade 101. The complementary kneading blade 102 is not necessarily provided, but is preferably provided in order to increase the kneading efficiency in the kneading process of kneading the bread dough.

  Here, the operation of the kneading blade 101 will be described. The kneading blade 101 rotates about the axis of the support shaft 100 together with the support shaft 100, and the folding posture shown in FIGS. 5, 7, 8A and 9A, and FIGS. Two postures are taken, the open posture shown in (b). In the folded position, the protrusion 101a (see FIG. 6) hanging from the lower edge of the kneading blade 101 comes into contact with the first stopper portion 93b provided on the upper surface (outer surface) of the dome-shaped cover 93. For this reason, the kneading blade 101 cannot further rotate counterclockwise (assuming the case viewed from above) with respect to the dome-shaped cover 93. In this folded position, the tip of the kneading blade 101 protrudes slightly from the dome-shaped cover 93.

  When the kneading blade 101 is rotated clockwise (assumed when viewed from above) with respect to the dome-shaped cover 93 from this posture (the state shown in FIG. 9A), the open posture shown in FIG. 9B is obtained. The tip of the kneading blade 101 protrudes greatly from the dome-shaped cover 93. The opening angle of the kneading blade 101 in this opening posture is limited by the second stopper portion 93 c (see FIG. 8) provided on the inner surface of the dome-shaped cover 93. When the second engagement body 103b (fixed to the support shaft 100), which will be described in detail later, is unable to rotate by hitting the second stopper portion 93c provided on the inner surface of the dome-shaped cover 93, the kneading blade 101 is at its maximum. The opening angle.

  When the kneading blade 101 is in the folded position, for example, as shown in FIGS. 5 and 7, the complementary kneading blade 102 is aligned with the kneading blade 101, and the kneading blade 101 is shaped like a “<”. The size becomes larger.

  Meanwhile, as shown in FIG. 6, a first engagement body 103 a constituting the cover clutch 103 is attached to the unit shaft 91 between the pulverization blade 92 and the seal cover 98. For example, a substantially rectangular opening 103aa is formed in the first engagement body 103a made of, for example, zinc die casting, and the first rectangular body 103 in the lower side of the unit shaft 91 is fitted into the opening 103aa so that the first The engaging body 103a is attached to the unit shaft 91 so as not to be relatively rotatable. The first engaging body 103a is fitted from the lower side of the unit shaft 91 prior to the crushing blade 92, and the stopper member 94 prevents the unit shaft 91 from dropping off together with the crushing blade 92. In the present embodiment, the washer 104 is disposed between the first engagement body 103a and the seal cover 98 in consideration of prevention of deterioration of the first engagement body 103a. However, the washer 104 is not necessarily provided. It does not have to be provided.

  A second engagement body 103b constituting the cover clutch 103 is attached to the lower side of the support shaft 100 to which the kneading blade 101 is attached. For example, a substantially rectangular opening 103ba is formed in the second engaging body 103b made of zinc die casting, and the second engaging member is fitted into the opening 103ba by fitting a substantially rectangular portion in plan view on the lower side of the support shaft 100. The united body 103b is attached to the support shaft 100 so as not to be relatively rotatable. In the present embodiment, the washer 105 is arranged on the upper side of the second engagement body 103b in consideration of prevention of deterioration of the second engagement body 103b. However, the washer 105 is not necessarily provided.

  The cover clutch 103 composed of the first engagement body 103a and the second engagement body 103b functions as a clutch that switches whether or not to transmit the rotational power of the blade rotation shaft 82 to the dome-shaped cover 93. In the cover clutch 103, the rotation direction of the blade rotation shaft 82 when the kneading motor 50 rotates the driving shaft 11 (this rotation direction is referred to as “forward rotation”. In this case, the rotational power of the blade rotation shaft 82 is transmitted to the dome-shaped cover 93. Conversely, the rotation direction of the blade rotation shaft 82 when the crushing motor 60 rotates the driving shaft 11 (this rotation direction is referred to as “reverse rotation”. In FIG. 8, clockwise rotation, and FIG. 9 counterclockwise rotation). The cover clutch 103 does not transmit the rotational power of the blade rotating shaft 82 to the dome-shaped cover 93. Hereinafter, the operation of the cover clutch 103 will be described in more detail.

  When the kneading blade 101 is in the folded position (for example, the state shown in FIGS. 8A and 9A), the engaging portion 103bb of the second engaging body 103b is engaged with the engaging portion 103ab of the first engaging body 103a (this embodiment). The angle is an angle that interferes with the rotation trajectory (there are two in the form but may be one) (see the broken line in FIG. 8A). Therefore, when the blade rotation shaft 82 rotates in the forward direction, the first engagement body 103 a and the second engagement body 103 b are engaged, and the rotational power of the blade rotation shaft 82 is transmitted to the dome-shaped cover 93.

  On the other hand, when the kneading blade 101 is in the open posture (for example, the state shown in FIGS. 8B and 9B), the engaging portion 103bb of the second engaging body 103b is the same as the engaging portion 103ab of the first engaging body 103a. The angle deviates from the rotation trajectory (see the broken line in FIG. 8B). For this reason, even if the blade rotation shaft 82 rotates, the first engagement body 103a and the second engagement body 103b are not engaged. Accordingly, the rotational power of the blade rotation shaft 82 is not transmitted to the dome-shaped cover 93.

  For example, as shown in FIGS. 5 and 6, the dome-shaped cover 93 is formed with a window 93 d that communicates the space inside the cover and the space outside the cover. The window 93d is arranged at a height equal to or higher than the grinding blade 92. In the present embodiment, a total of four windows 93d are arranged at intervals of 90 °, but other numbers and arrangement intervals can be selected.

  A total of four ribs 93e are formed on the inner surface of the dome-shaped cover 93 so as to correspond to the windows 93d. Each rib 93e extends obliquely in the radial direction from the vicinity of the center of the dome-shaped cover 93 to the outer peripheral annular wall, and the four ribs 93e form a kind of bowl shape. Moreover, each rib 93e is curving so that the side which faces the bread raw material pressed toward it may become convex.

  A detachable guard 106 is attached to the lower surface of the dome-shaped cover 93. The guard 106 covers the lower surface of the dome-shaped cover 93 and prevents the user's finger from approaching the grinding blade 92. The guard 106 is formed of, for example, an engineering plastic having heat resistance, and can be a molded product such as PPS (polyphenylene sulfide). The guard 106 need not be provided, but is preferably provided so that the user can use it with peace of mind.

  For example, as shown in FIG. 6, at the center of the guard 106, there is a ring-shaped hub 106 a through which a stopper member 94 fixed to the unit shaft 91 is passed. Further, a ring-shaped rim 106b is provided at the periphery of the guard 106. The hub 106a and the rim 106b are connected by a plurality of spokes 106c. Between the spokes 106c, there is an opening 106d through which the grain to be crushed by the pulverizing blade 92 is passed. The opening 106d has a size that prevents a finger from passing through.

  When the spoke 106 c of the guard 106 is attached to the dome-shaped cover 93, the spoke 106 c comes into close proximity with the grinding blade 92. The guard 106 is shaped like an outer blade of a rotary electric razor, and the grinding blade 92 is shaped like an inner blade.

  On the periphery of the rim 106b, a total of four columns 106e (not limited to this configuration) are integrally formed at intervals of 90 °. A horizontal groove 106ea having one end dead end is formed on a side surface of the pillar 106e facing the center side of the guard 106. The guard 106 is attached to the dome-shaped cover 93 by engaging the grooves 106 ea with the projections 93 f formed on the outer periphery of the dome-shaped cover 93 (all four are arranged at intervals of 90 °). . The groove 106ea and the protrusion 93f are provided so as to constitute a bayonet connection.

  As described above, in the automatic bread maker 1 of the present embodiment, since the crushing blade 92 and the kneading blade 101 are incorporated into one unit (blade unit 90), the handling thereof is convenient. The user can easily pull out the blade unit 90 from the blade rotating shaft 82, and can easily clean the blade after the bread making operation. Further, the pulverizing blade 92 provided in the blade unit 90 is detachably attached to the unit shaft 91, and is easily mass-produced and has excellent maintainability such as blade replacement.

  Further, in the automatic bread maker 1 of the present embodiment, since a liquid such as water is put into the bread container 80, the bearing 95 is preferably sealed to prevent the liquid from entering the bearing 95. In this respect, in the automatic bread maker 1, since the bearing 95 is accommodated in the concave accommodating portion 931 provided in the dome-shaped cover 93, the sealing means (the sealing material 97 and the sealing material 97 and the sealing material only on the inner surface side of the dome-shaped cover 93 are provided. If the cover 98) is provided, a structure for sealing the bearing 95 is obtained. For this reason, it is not necessary to provide sealing means above and below the bearing 95, and the seal structure of the bearing 95 can be downsized. For this reason, in the automatic bread maker 1, it is possible to suppress an adverse effect on the shape of the baked bread (for example, the bottom surface of the bread is greatly recessed).

  FIG. 10 is a block diagram showing the configuration of the automatic bread maker of the present embodiment. As shown in FIG. 10, the control operation in the automatic bread maker 1 is performed by the control device 120. The control device 120 is configured by, for example, a microcomputer including a central processing unit (CPU), a read only memory (ROM), a random access memory (RAM), and an input / output (I / O) circuit unit. . The control device 120 is preferably disposed at a position that is not easily affected by the heat of the baking chamber 30. Further, the control device 120 is provided with a time measuring function, and temporal control in the bread manufacturing process is possible. The control device 120 is an example of the abnormality detection unit of the present invention.

  The control device 120 includes the operation unit 20 described above, a temperature sensor 15 that detects the temperature of the baking chamber 30, a motor drive circuit 121, a heater drive circuit 122, a first solenoid drive circuit 123, and a second The solenoid drive circuit 124 and the power supply state detection circuit 125 are electrically connected.

  The motor drive circuit 121 is a circuit for driving each of the kneading motor 50 and the crushing motor 60 under a command from the control device 120, and includes a power supply unit 121a and a supply current detection unit 121b. The power supply unit 121 a supplies power for driving the kneading motor 50 and the grinding motor 60. The supply current detection unit 121 b detects the magnitude of the current supplied to the kneading motor 50 or the pulverization motor 60 (hereinafter referred to as supply current value) and inputs it to the control device 120. Further, the control device 120 detects an abnormality in the kneading motor 50 or the grinding motor 60 based on the supply current value detected by the supply current detection unit 121b.

  The power supply unit 121a is an example of the power supply unit of the present invention, the supply current detection unit 121b is an example of the supply current detection unit of the present invention, and the power supply state detection circuit 125 is the power supply state detection unit of the present invention. It is an example. Details of the circuit configuration of the motor drive circuit 121 including the power supply unit 121a and the supply current detection unit 121b will be described later. Details of the operation of detecting abnormality of the kneading motor 50 or the grinding motor 60 by the control device 120 will also be described later.

  The heater drive circuit 122 is a circuit for controlling the operation of the sheathed heater 31 under a command from the control device 120. The first solenoid drive circuit 123 controls the driving of the automatic charging solenoid 16 that is driven to automatically input a part of the bread ingredients in the course of the bread manufacturing process, under a command from the control device 120. It is a circuit for. The second solenoid drive circuit 124 controls driving of the clutch solenoid 73 (see FIG. 3) used when switching the state of the clutch 56 (see FIG. 3) under a command from the control device 120. Circuit.

The control device 120 reads a program relating to a bread manufacturing course (breadmaking course) stored in a ROM or the like based on an input signal from the operation unit 20, and a kneading blade by the kneading motor 50 via the kneading motor driving circuit 121 101, the rotation of the complementary kneading blade 102, the rotation of the grinding blade 92 by the grinding motor 60 through the motor drive circuit 121, the heating operation by the sheathed heater 31 through the heater drive circuit 122, the first solenoid While the operation control of the movable hook 42c by the automatic closing solenoid 16 is performed via the driving circuit 123 and the switching control of the clutch 56 is performed by the clutch solenoid 73 via the second solenoid driving circuit 124, The manufacturing process is executed.
(Operation of automatic bread machine)
The operation in the case of producing bread with the automatic bread maker 1 configured as described above will be described. Here, the operation of the automatic bread maker 1 will be described by taking as an example a case where bread is produced by using the rice grain as a starting material by the automatic bread maker 1.

  When rice grains are used as a starting material, a bread-making course for rice grains is executed. FIG. 11 is a schematic diagram showing the flow of a rice grain bread-making course executed by an automatic bread maker. As shown in FIG. 11, in the bread making course for rice grains, the dipping process, the pulverization process, the pause process, the kneading (kneading) process, the fermentation process, and the baking process are sequentially performed in this order. The

  In starting the rice grain breadmaking course, the user attaches the blade unit 90 to the blade rotation shaft 82 by covering the blade rotation shaft 82 of the bread container 80 with the unit shaft 91. Then, the user weighs rice grains, water, and seasonings (eg, salt, sugar, shortening, etc.) by a predetermined amount and puts them into the bread container 80.

  In addition, the user weighs the bread ingredients that are automatically added during the bread manufacturing process and puts them in the container body 42 a of the bread ingredient storage container 42. When the bread material to be stored is stored in the container body 42a, the container lid 42b is supported by the movable hook 42c, and the opening of the container body 42a is closed by the container lid 42b.

  In addition, as a bread raw material accommodated in the bread raw material storage container 42, gluten, dry yeast, etc. are mentioned, for example. Instead of gluten, for example, at least one of flour, thickener (eg, guar gum), and upper fresh powder may be stored in the bread ingredient storage container 42. In addition, for example, only dry yeast may be stored in the bread raw material storage container 42 without using gluten, wheat flour, thickener, super fresh powder or the like. Further, in some cases, seasonings such as salt, sugar, and shortening are stored in the bread ingredient storage container 42 together with, for example, gluten and dry yeast so as to be automatically introduced during the bread manufacturing process. May be. In this case, the bread raw material previously put into the bread container 80 is rice grains and water (in place of mere water, for example, a liquid having a taste component such as soup stock, a liquid containing fruit juice or alcohol, etc.) Become.

  Thereafter, the user puts the bread container 80 into the baking chamber 30 and further attaches the bread ingredient storage container 42 to a predetermined position of the lid 40. Then, the user closes the lid 40, selects the rice grain breadmaking course using the operation unit 20, and presses the start key. Thereby, the control apparatus 120 starts control operation | movement of the bread-making course for rice grains which manufactures bread using a rice grain as a starting material.

  When the rice grain breadmaking course is started, the dipping process is started by a command from the control device 120. In the dipping process, the bread raw material previously put in the bread container 80 is set in a stationary state, and the stationary state is maintained for a predetermined time (30 minutes in the present embodiment). This dipping process is a process aimed at making the rice grains easy to be pulverized to the core in the subsequent pulverization process by adding water to the rice grains.

  The water absorption speed of rice grains varies depending on the temperature of the water. If the water temperature is high, the water absorption speed increases, and if the water temperature is low, the water absorption speed decreases. For this reason, you may make it fluctuate the time of an immersion process with the environmental temperature etc. in which the automatic bread maker 1 is used, for example. Thereby, it becomes possible to suppress the dispersion | variation in the water absorption degree of a rice grain. Further, in order to shorten the immersion time, the sheathed heater 31 may be energized to increase the temperature of the firing chamber 30.

  Further, the grinding blade 92 may be rotated at the initial stage of the dipping process, and further, the grinding blade 92 may be intermittently rotated thereafter. If it does in this way, the surface of a rice grain can be damaged, and the liquid absorption efficiency of a rice grain will be improved.

When the predetermined time elapses, the dipping process is ended by a command from the control device 120, and a crushing process for crushing the rice grains is started. In this pulverization step, the pulverization blade 92 is rotated at a high speed (for example, 7000 to 8000 rpm) in a mixture containing rice grains and water. In this crushing step, the control device 120 controls the crushing motor 60 to rotate the blade rotation shaft 82 in the reverse direction (clockwise rotation in FIG. 8 and counterclockwise rotation in FIG. 9). The control device 120 drives the clutch solenoid 73 to drive the clutch 56 before driving the grinding motor 60 (the state shown in FIG. 3A).
As described above, in the pulverization step, the driving shaft 11 needs to be rotated at a high speed, and the pulverization motor 60 may be locked in order to pulverize the cereal grains (rice grains). However, in the automatic bread maker 1 of this embodiment, the control device 120 can detect an abnormality (lock) of the crushing motor 60. Therefore, it is possible to effectively increase the safety of the automatic bread maker 1 and effectively suppress the occurrence of a failure.

  When the blade rotation shaft 82 is rotated in the reverse direction to rotate the grinding blade 92, the dome-shaped cover 93 also starts to rotate following the rotation of the blade rotation shaft 82. The rotation of the cover 93 is immediately blocked (stopped). It is preferable that the pulverizing blade 92 is rotated at a low speed in the initial stage of the pulverization process and then rotated at a high speed.

  The rotation direction of the dome-shaped cover 93 accompanying the rotation of the blade rotation shaft 82 for rotating the grinding blade 92 is the counterclockwise direction in FIG. 9, and the kneading blade 101 has been folded until then (see FIG. 9A). In the case of the posture shown in FIG. 9, the posture is changed to the open posture (the posture shown in FIG. 9B) by the resistance received from the mixture containing rice grains and water.

  When the kneading blade 101 is in the open posture, the engagement portion 103bb of the second engagement body 103b deviates from the rotation track of the engagement portion 103ab of the first engagement body 103a (see the broken line in FIG. 8). For this purpose, the cover clutch 103 disconnects the blade rotation shaft 82 from the dome-shaped cover 93. Further, as shown in FIG. 9B, a part of the kneading blade 101 in the open position (more precisely, the cushioning material 107 provided on the front end side) is formed on the inner wall of the bread container 80 (more specifically, The rotation of the dome-shaped cover 93 is prevented (stopped) in order to come into contact with the bowl-shaped protrusion 80b provided on the inner wall of the bread container 80 in order to improve the grinding efficiency.

  In the crushing process, vibration is generated while the crushing blade 92 is rotating. However, since the cushioning material 107 is in contact with the bread container 80, the collision sound generated by this vibration is reduced. It has become.

  The pulverization of the rice grains in the pulverization step is performed in a state where water is soaked in the rice grains by the previously performed immersion step, and thus the rice grains can be easily pulverized to the core. In the present embodiment, the rotation of the pulverizing blade 92 in the pulverization step is intermittent. This intermittent rotation is performed, for example, in a cycle of rotating for 30 seconds and stopping for 5 minutes, and this cycle is repeated 10 times. In the last cycle, the stop for 5 minutes is not performed. The rotation of the crushing blade 92 may be continuous rotation, but for the purpose of, for example, preventing the temperature of the raw material in the bread container 80 from becoming too high, it is preferable to perform intermittent rotation.

  In the pulverization step, the pulverization of the rice grains is performed in the dome-shaped cover 93 whose rotation is stopped, so that the possibility that the rice grains scatter outside the bread container 80 is low. Further, the rice grains entering the dome-shaped cover 93 from the opening 106d of the guard 106 in the rotation stopped state are sheared between the stationary spoke 106c and the rotating pulverizing blade 92, so that the pulverization can be performed efficiently. Further, the rib 93e provided on the dome-shaped cover 93 suppresses the flow of the mixture containing rice grains and water (flow in the same direction as the rotation of the grinding blade 92), so that the grinding can be performed efficiently.

  The mixture containing the pulverized rice grains and water is guided in the direction of the window 93d by the rib 93e, and is discharged out of the dome-shaped cover 93 from the window 93d. Since the rib 93e is curved so that the side facing the mixture pressing toward it is convex, the mixture hardly stays on the surface of the rib 93e and flows smoothly toward the window 93d. Further, instead of the mixture being discharged from the inside of the dome-shaped cover 93, the mixture existing in the space above the concave portion 81 enters the concave portion 81 and passes through the opening portion 106d of the guard 106 from the concave portion 81. Enter the cover 93. Since the pulverization by the pulverization blade 92 is performed while being circulated as described above, the pulverization can be performed efficiently.

  In the automatic bread maker 1, the crushing process is completed in a predetermined time (in this embodiment, 50 minutes). However, the grain size of the pulverized powder may vary depending on the hardness of the rice grains and the environmental conditions. For this reason, the end of the pulverization process may be determined based on the magnitude of the load of the pulverization motor 60 (for example, it can be determined by the control current of the motor).

  When the pulverization process is completed, a pause process is executed according to a command from the control device 120. This pause process is provided as a cooling period during which the temperature of the contents in the bread container 80 raised by the crushing process is lowered. The reason for lowering the temperature is that the next kneading step is carried out at a temperature at which the yeast is active (for example, around 30 ° C.). In the present embodiment, the pause process is a predetermined time (30 minutes). However, in some cases, the pause process may be performed until the temperature of the bread container 80 reaches a predetermined temperature.

  When the pause process ends, the kneading process is started by a command from the control device 120. The control device 120 drives the clutch solenoid 73 before driving the kneading motor 50 so that the clutch 56 transmits power (the state shown in FIG. 3B). The control device 120 starts driving the kneading motor 50 to rotate the blade rotation shaft 82 in the forward direction (counterclockwise rotation in FIG. 8 and clockwise rotation in FIG. 9).

  When the blade rotation shaft 82 is rotated in the forward direction, the grinding blade 92 is also rotated in the forward direction, and the bread ingredients around the grinding blade 92 flow in the forward direction. Accordingly, when the dome-shaped cover 93 moves in the forward direction (clockwise in FIG. 9), the kneading blade 101 receives resistance from the non-flowing bread ingredients and is folded from the open position (see FIG. 9B). The angle is changed to (see FIG. 9A). As a result, the engaging portion 103bb of the second engaging body 103b has an angle that interferes with the rotation trajectory (see the broken line in FIG. 8) of the engaging portion 103ab of the first engaging body 103a. Then, the cover clutch 103 connects the blade rotation shaft 82 and the dome-shaped cover 93, and the dome-shaped cover 93 enters a state of being driven in earnest by the blade rotation shaft 82. The dome-shaped cover 93 and the kneading blade 101 in the folded position rotate together with the blade rotation shaft 82 in the forward direction.

  In order to reliably connect the cover clutch 103 described above, it is preferable that the rotation of the blade rotation shaft 82 at the initial stage of the kneading process is intermittent rotation or low speed rotation. Further, as described above, when the kneading blade 101 is in the folded position, the complementary kneading blade 102 is arranged on the extension of the kneading blade 101, so that the kneading blade 101 is enlarged and the bread raw material is pressed strongly. It is. For this reason, the dough can be kneaded firmly.

  The rotation of the kneading blade 101 (this term is used as an expression including the complementary kneading blade 102 in the folded position, the same applies hereinafter) is very slow in the initial stage of the kneading process, and the speed is increased stepwise. Control is performed by the control device 120. In the initial stage of the kneading process in which the kneading blade 101 rotates very slowly, the control device 120 drives the automatic charging solenoid 16 so that the movable hook 42c of the bread ingredient storage container 42 supports the container lid 42b. Let go. Thereby, the opening of the container main body 42a is opened, and for example, bread ingredients such as gluten and dry yeast are automatically charged into the bread container 80.

  As described above, the bread raw material storage container 42 is provided with a coating layer inside the container body 42a and the container lid 42b to improve slipping, and is devised so that there is no uneven portion inside. Yes. Furthermore, the situation where the bread raw material is caught by the packing 42d is also suppressed by the device for arranging the packing 42d. For this reason, the automatic charging is completed with almost no bread ingredients remaining in the bread ingredient storage container 42.

  In this embodiment, the bread ingredients stored in the bread ingredient storage container 42 are charged while the kneading blade 101 is rotating. However, the present invention is not limited to this, and the kneading blade 101 stops. You may throw it in However, as in this embodiment, it is preferable to add the bread ingredients while the kneading blade 101 is rotated because the bread ingredients can be uniformly dispersed.

  After the bread ingredients stored in the bread ingredient storage container 42 are put into the bread container 80, the bread ingredients are kneaded into a dough connected to one having a predetermined elasticity by the rotation of the kneading blade 101. Go. When the kneading blade 101 swings the dough and knocks it against the inner wall of the bread container 80, an element of “kneading” is added to the kneading. As the kneading blade 101 rotates, the dome-shaped cover 93 also rotates. When the dome-shaped cover 93 rotates, the rib 93e formed on the dome-shaped cover 93 also rotates, so that the bread material in the dome-shaped cover 93 is quickly discharged from the window 93d and the kneading blade 101 kneads the bread. Assimilate into a lump of material.

  In the kneading process, the guard 106 is also rotated in the forward direction together with the dome-shaped cover 93. The spoke 106c of the guard 106 has a shape in which the center side of the guard 106 precedes and the outer peripheral side of the guard 106 follows when rotating in the forward direction. For this purpose, the guard 106 rotates in the forward direction to push the bread ingredients inside and outside the dome-shaped cover 93 outward with the spokes 106c. Thereby, the ratio of the raw material used as a waste after baking bread can be reduced.

  Further, the pillar 106e of the guard 106 has a side surface 106eb (see FIG. 6) which is the front surface in the rotation direction when the guard 106 rotates in the forward direction, and is inclined upward. Bread ingredients are sprung upward on the front surface of the column 106e. For this reason, the ratio of the raw material which becomes waste after baking bread can be reduced.

  In the automatic bread maker 1, the time of the kneading process is configured to employ a predetermined time (10 minutes in the present embodiment) obtained experimentally as the time for obtaining dough having a desired elasticity. However, if the time of the kneading process is constant, the degree of bread dough may vary depending on the environmental temperature or the like. For this reason, for example, a configuration in which the end point of the kneading process is determined based on the magnitude of the load of the kneading motor 50 (for example, it can be determined by the control current of the motor) may be used.

  In addition, what is necessary is just to put it in the middle of this kneading process, when baking bread containing ingredients (for example, raisins, nuts, cheese, etc.).

  When the kneading process is finished, the fermentation process is started by a command from the control device 120. In this fermentation process, the control device 120 controls the sheathed heater 31 to maintain the temperature of the baking chamber 30 at a temperature at which fermentation proceeds (for example, 38 ° C.). Then, it is left for a predetermined time (in this embodiment, 60 minutes) in an environment in which fermentation proceeds.

  In some cases, during the fermentation process, the kneading blade 101 may be rotated to perform degassing or dough rounding.

  When the fermentation process ends, the firing process is started by a command from the control device 120. The control device 120 controls the sheathed heater 31 to increase the temperature of the baking chamber 30 to a temperature suitable for baking (for example, 125 ° C.). Then, the control device 120 performs control so that the bread is baked in a baking environment for a predetermined time (in this embodiment, 50 minutes). The end of the firing process is notified to the user by, for example, a display on the liquid crystal display panel of the operation unit 20 or a notification sound. When the user detects the completion of bread making, the user opens the lid 40 and takes out the bread container 80 to complete the bread production.

The bread in the bread container 80 can be taken out, for example, by turning the opening of the bread container 80 obliquely downward. Simultaneously with the removal of the bread, the blade unit 90 attached to the blade rotation shaft 82 is also removed from the bread container 80. At the bottom of the bread, burn marks of the kneading blade 101 of the blade unit 90 and the complementary kneading blade 102 (projecting upward from the recess 81 of the bread container 80) remain. However, since the dome-shaped cover 93 and the guard 106 are accommodated in the recess 81, they are prevented from leaving a large burn mark on the bottom of the bread.
(Motor drive circuit)
Next, the circuit configuration of the motor drive circuit 121 will be described with a specific example. FIG. 12 is a circuit diagram showing a motor drive circuit. As shown in FIG. 12, the motor drive circuit 121 of this example corresponds to a part of the AC power supply P corresponding to the power supply unit 121a (see FIG. 10), the relay RY, and the supply current detection unit 121b described above. Current transformer CT. These are connected in series to the kneading motor 50 and the grinding motor 60.

  The AC power source P is a power source that supplies, for example, AC power supplied from a commercial power source (or AC power obtained by adjusting power supplied from the commercial power source). In the triac TRI, its two main electrodes are connected in series to the AC power source P, the kneading motor 50 and the grinding motor 60, and a drive signal output from the control device 120 is input to the control electrode.

  For example, the control device 120 inputs a pulsed or continuous drive signal (current signal larger than the holding current of the triac TRI) to the control electrode of the triac TRI, thereby turning the triac TRI into a conductive state (ON). The triac TRI conducts the alternating current from when the drive signal is input to the control electrode until the alternating current supplied by the alternating current power supply P and input to the main electrode becomes zero. Therefore, the control device 120 partially supplies the AC power supplied from the AC power supply P to the kneading motor 50 or the grinding motor 60 by inputting a pulsed drive signal to the control electrode of the TRIAC TRI. Can do. On the other hand, the controller 120 can supply the AC power supplied from the AC power source P to the kneading motor 50 or the grinding motor 60 substantially as it is by inputting a continuous drive signal to the control electrode of the TRIAC TRI. it can.

  Note that the control device 120 inputs a pulsed drive signal to the control electrode of the triac TRI based on a zero-cross signal (a signal indicating the timing at which the voltage of the AC power supplied from the AC power supply P becomes 0), which will be described later. You can decide. In this case, the control device 120 can easily control the amount of AC power supplied to the kneading motor 50 or the grinding motor 60 by turning on the triac TRI.

  The current transformer CT includes a primary side coil L1 connected in series to the AC power supply P, the triac TRI, the kneading motor 50 and the grinding motor 60, and a magnetic field generated by passing a current through the primary side coil L1. And a secondary coil L2 that generates a current. One end of the secondary coil L2 is grounded, and the anode of the diode D1 is connected to the other end. The other end of the resistor R1 whose one end is grounded is connected to the cathode of the diode D1. The other end of the capacitor C, one end of which is grounded, is connected to the connection node of the resistor R1 and the diode D1, and a voltage signal (a signal indicating a supply current value) appearing at the connection node is input to the control device 120. The

  The diode D1 and the capacitor C rectify and smooth the current generated in the secondary coil L2 (convert alternating current into direct current). The resistor R1 generates a signal that can be acquired by the control device 120 by converting the current signal into a voltage signal. Note that the current transformer CT, the diode D1, the resistor R1, and the capacitor C correspond to the above-described supply current detector 121b (see FIG. 10).

  The control device 120 acquires the analog voltage signal (signal indicating the supply current value) obtained as described above and converts it into a digital signal. Thereby, the control device 120 can confirm the magnitude (supply current value) of the alternating current supplied to the grinding motor 60 or the kneading motor 50 via the triac TRI.

  The relay RY includes an AC power supply P and a triac TRI, a switch Sry that can switch an electrical and mechanical connection with any of the kneading motor 50 and the grinding motor 60, and a control coil Lry that controls the connection of the switch Sry. Prepare. The control coil Lry has one end grounded and connected to the anode of the diode D2, and the other end connected to the cathode of the diode D2. For example, the switch Sry connects the AC power supply P and the triac TRI and the kneading motor 50 when current is not communicated to the control coil Lry, and the AC power supply P and triac TRI when the current is communicated to the control coil Lry. The grinding motor 60 is connected.

  The collector of a PNP transistor TR is connected to the connection node between the other end of the control coil Lry and the cathode of the diode D2. One end of the resistor R2 is connected to the emitter of the transistor TR, and a DC power source VE (for example, a power source that generates and supplies DC power based on AC power supplied from a commercial power source) is connected. The other end of the resistor R2 is connected to the base of the transistor TR, and one end of the resistor R3 is connected to the connection node. The control device 120 outputs a switching signal for controlling switching of the relay RY to the other end of the resistor R3.

  For example, when the control device 120 outputs a switching signal with a voltage (low) that is low enough to turn on the transistor (conducting between the emitter and the collector), the direct current supplied by the direct current power source VE is passed to the control coil Lry, The AC power supply P, the triac TRI, and the grinding motor 60 are connected. On the other hand, when the control device 120 outputs a switching signal having a voltage (high) that is high enough to turn off the transistor (non-conduction between the emitter and the collector), the direct current supplied from the direct current power source VE is communicated to the control coil Lry. First, the AC power supply P and the triac TRI and the kneading motor 50 are connected.

  With this configuration, when the control device 120 does not output a switching signal (high impedance), the AC power supply P and the triac TRI are connected to the kneading motor 50 (the motor that rotates the driving shaft 11 at a low speed), and the grinding motor ( Since a motor that rotates the driving shaft 11 at a high speed is not connected, it is preferable from the viewpoint of ensuring safety.

  The configuration example of the motor drive circuit 121 shown in FIG. 12 includes a common drive system (current transformer CT, diode D1, resistor R1, capacitor C, and triac TRI) for the kneading motor 50 and the grinding motor 60, and is driven. However, the automatic bread maker according to the present invention is not limited to this configuration. The automatic bread maker according to the present invention is not limited to this configuration, but includes a configuration for selecting a motor to be operated (relay RY, diode D2, transistor TR, resistor R2, and resistor R3). For example, it does not have a configuration for selecting a motor to be driven, but has a separate drive system, and the control device 120 controls each drive system (particularly, the triac TRI) to select the kneading motor 50 and the grinding motor 60. However, it may be configured to drive automatically.

  However, in the above-described configuration example (see FIG. 12), the AC power supply P and the triac TRI and any one of the kneading motor 50 and the grinding motor 60 are electrically and mechanically connected. Therefore, for example, even if a malfunction of the control device 120 occurs, it is preferable because both the kneading motor 50 and the grinding motor 60 are prevented from being driven.

  The power supply state detection circuit 125 generates a signal indicating the state of the AC power supply P and inputs it to the control device 120. As a signal indicating the state of the AC power supply P, for example, a signal indicating the magnitude of the voltage of the AC power supplied by the AC power supply P (for example, an effective value, hereinafter referred to as a power supply voltage value) or the AC power supply P is supplied. A signal indicating the frequency (for example, 50 Hz or 60 Hz, hereinafter referred to as a power supply frequency) of AC power to be used can be employed. It should be noted that other signals may be adopted as the signal indicating the state of the AC power supply P. However, for the sake of concrete explanation, a case where the power supply state detection circuit 125 can output the above two signals will be exemplified.

  The power supply state detection circuit 125 may use any known circuit for generating a signal indicating the power supply voltage value. For example, the power supply state detection circuit 125 performs full-wave rectification on the AC power supplied from the AC power supply P by a diode bridge or the like, and smoothes the obtained pulsating current with a capacitor or the like. You may output as a signal to show. In this case, the control device 120 can check the power supply voltage value by measuring the voltage value of this signal.

  The power supply state detection circuit 125 may use any known circuit in order to generate a signal indicating the power supply frequency. For example, when the signal is a zero-cross signal, the power supply state detection circuit 125 performs full-wave rectification on the AC power supplied from the AC power supply P by a diode bridge or the like, and passes the obtained pulsating current to the light-emitting diode of the photocoupler. A signal obtained by binarizing and inverting a signal appearing in the phototransistor of the coupler with an inverter or the like may be output as a signal indicating the power supply frequency. In this case, the control device 120 can confirm the power supply frequency by measuring the number of times that this signal becomes high within a predetermined time (that is, the number of zero cross points).

  By the way, as described above, the control device 120 can detect any abnormality of the kneading motor 50 and the crushing motor 60. However, in the following, for the sake of concrete explanation, a case where the control device 120 detects an abnormality of the crushing motor 60 that is highly necessary to detect the abnormality as described above will be exemplified. In addition, when the controller 120 detects an abnormality of the kneading motor 50, a method similar to that when detecting an abnormality of the pulverization motor 60 described later may be applied.

  Hereinafter, the abnormality detection operation of the crushing motor 60 by the control device 120 will be described with reference to the drawings with specific examples. FIG. 13 is a flowchart showing an operation for detecting abnormality of the grinding motor by the control device. Note that the detection operation of the control device 120 shown in FIG. 13 can be performed in each process included in the manufacturing course described above (for example, each process obtained by subdividing the process shown in FIG. 11).

  As shown in FIG. 13, when driving the grinding motor 60 (STEP1, YES), the control device 120 is based on a signal input from the power supply state detection circuit 125 (see FIGS. 10 and 11), and the AC power supply P Are checked (power supply voltage value and power supply frequency), and a threshold is set (STEP 2). Further, the control device 120 confirms the supply current value based on signals input from the supply current detection unit 121b (see FIG. 10; in FIG. 11, the current transformer CT, the diode D1, the resistor R1, and the capacitor C) ( (Step 3).

  The threshold value is a value that can be compared with the supply current value. If the supply current value is equal to or greater than the threshold value, the crushing motor 60 is abnormal (for example, an excessive current is generated in the motor drive circuit 121 due to locking or the like). It is a value that can be determined to be highly likely. For example, the control device 120 records a table of candidate values (respective threshold values corresponding to each power supply voltage value and each power supply frequency) obtained in advance by experiments or the like, and supports both the confirmed power supply voltage value and power supply frequency. The threshold value is set by reading out the candidate value obtained from the table.

  In the above table, when the power supply frequency is the same, the power supply voltage value is within a predetermined range (for example, within a range excluding a value close to the lower limit and a value close to the upper limit, in other words, an intermediate range). The larger the value, the larger the candidate value. In the case of this example, if the power supply voltage value is outside the above predetermined range, the candidate value becomes substantially constant (stops raising and stopping) even if the power supply voltage value fluctuates. Also, if the power supply frequency is different, the candidate value may be different even when the power supply voltage value is the same. As described above, since the control device 120 sets the threshold value suitable for the power supply voltage value and the power supply frequency, it is possible to detect the abnormality of the motor with high accuracy.

  For example, when the table as described above is adopted, the control device 120 supplies the normal power to the AC power supply P when the AC power supply P supplies power smaller than normal and the grinding motor 60 has an abnormality. It is possible to detect an abnormality of the pulverization motor 60 without being confused with the case where the pulverization motor 60 is normal. Similarly, when the AC power supply P supplies power larger than normal and the pulverization motor 60 has no abnormality, the control device 120 supplies normal power and the pulverization motor 60 has abnormality. It is possible not to be confused with and not to detect anomalies.

  The above STEP2 and STEP3 are performed every predetermined timing (for example, every 144 ms). And the control apparatus 120 confirms whether the confirmed supply current value is more than a threshold value continuously X times or more (STEP4). This X times is the number of times that a state where the supply current value can suddenly take a threshold value or more can be excluded. For example, when the control device 120 sets a threshold value every 144 ms and confirms the supply current value, X may be set to 7 times.

  If the confirmed supply current value does not continuously exceed the threshold value X times or more (STEP 4, NO) and the driving of the crushing motor 60 is not finished (STEP 5, NO), the control device 120 is STEP 2. Return to, and continue to set the threshold and confirm the supply current value. On the other hand, the control device 120 is the case where the confirmed supply current value does not continuously exceed the threshold value X times or more (STEP 4, NO), and when the driving of the grinding motor 60 is finished (STEP 5, YES). Then, the manufacturing course is advanced to perform the next process (STEP 6), and the abnormality detection operation of the grinding motor 60 in the current process is terminated.

  If comprised in this way, it will become possible to suppress that the control apparatus 120 detects abnormality and inhibits the operation | movement of the automatic bread maker 1 even when supply current value becomes more than a threshold value suddenly. .

  On the other hand, in the control device 120, when the confirmed supply current value continuously exceeds the threshold value X times or more (STEP 4, YES), the crushing motor 60 is abnormal (for example, locked). Thus, the manufacturing course is stopped (STEP 7), and the abnormality detection operation of the grinding motor 60 is terminated. At this time, the control device 120 may notify the user that the manufacturing course has been canceled due to an abnormality by a display on the liquid crystal display panel of the operation unit 20 or a notification sound. In STEP 7, if the control device 120 stops the supply of power to the grinding motor 60 by stopping the drive signal to the triac TRI (see FIG. 12), the manufacturing course is set as described above. It may be stopped or stopped (trying to resume the manufacturing course after a predetermined time has elapsed).

  Further, in the step of not driving the grinding motor 60 (STEP 1, NO), the control device 120 advances the manufacturing course without setting the threshold value or confirming the supply current value (STEP 6).

As described above, the control device 120 sets a reference (a threshold value in the above-described specific example) corresponding to a change in the state of the power supply (in the above-described specific example, the AC power supply P), and the motor ( In the specific example described above, an abnormality of the grinding motor 60) is detected. Therefore, it is possible to detect abnormality of the motor with high accuracy according to the state of the power source. Therefore, the safety of the automatic bread maker 1 can be improved and the occurrence of failure can be suppressed.
(Other)
The embodiment of the automatic bread maker described above is an example of the present invention, and the configuration of the automatic bread maker to which the present invention is applied is not limited to the embodiment described above.

  Further, the case where the control device 120 detects the abnormality of the crushing motor 60 has been mainly described. However, as described above, the control device 120 is a method similar to the method of detecting the abnormality of the crushing motor 60 (see FIG. 13). Thus, the abnormality of the kneading motor 50 can be detected. However, in this case, it is preferable that the control device 120 records a table (candidate value) corresponding to the kneading motor 50 and sets a threshold value different from that in the case of detecting an abnormality of the grinding motor 60.

  In the embodiment described above, the connection between the AC power supply P and the triac TRI and any of the kneading motor 50 and the grinding motor 60 can be switched as a configuration including the relay RY, but the same operation is realized. Any other configuration may be used as long as it can be obtained. Similarly, in the embodiment described above, a signal indicating the supply current value is generated by the current transformer CT, the diode D1, the resistor R1, and the capacitor C. However, as long as the same operation can be realized, Other configurations may be used.

  Moreover, in embodiment shown above, the structure and operation | movement of an automatic bread maker were demonstrated for the case where the grain of rice was used as a starting raw material. However, the present invention is also applicable when grain grains other than rice grains such as wheat, barley, straw, buckwheat, buckwheat, corn, and soybean are used as starting materials.

  Moreover, in the above, the case where the rice grain (cereal grain) was used as a starting raw material was shown, However, the automatic bread maker 1 of this embodiment uses, for example, cereal flour such as wheat flour and rice flour as a starting raw material. It can also be manufactured. When wheat flour or rice flour is used as a starting material, the grinding blade 92 is not necessary. In this case, a bread container or a blade unit different from those shown above may be used.

  Moreover, in the above, although illustrated about the automatic bread maker 1 which can perform all the processes concerning the manufacture of bread, such as a dough manufacturing process (dipping process, crushing process and kneading process), fermentation process and baking process, The automatic bread maker of the present invention is not necessarily limited to one capable of executing all these steps. For example, among the above steps, those that cannot execute at least one step except the dough manufacturing step can be included in the automatic bread maker of the present invention. In this case, the configuration related to the process that cannot be executed (for example, the sheathed heater 31 and the heater driving circuit 122) may not be provided in the automatic bread maker.

  The present invention is suitable for an automatic bread maker for home use.

1 Automatic bread machine 11 Driving shaft 50 Kneading motor (motor)
56 Clutch 60 Grinding motor (motor)
80 Bread container 82 Blade rotating shaft 92 Grinding blade 101 Kneading blade 120 Control device (abnormality detection means)
121 motor drive circuit 121a power supply unit (power supply means)
121b Supply current detector (Supply current detector)
125 Power supply state detection circuit (power supply state detection means)
RY relay P AC power supply

Claims (6)

An automatic bread maker equipped with a motor capable of applying rotational power to a driving shaft that can be connected to a bread container into which bread raw material is charged so that rotational power can be transmitted,
Power supply means for supplying power for driving the motor;
Power supply state detection means for detecting the state of the power supply means;
An abnormality detection means for detecting an abnormality of the motor;
With
The automatic bread maker, wherein the abnormality detection unit sets a reference for detecting abnormality of the motor as being different depending on a detection result of the power state detection unit. Further comprising supply current detection means for detecting the magnitude of the current supplied to the motor;
The abnormality detection means sets a threshold according to the detection result of the power supply state detection means as the reference;
The abnormality detection unit detects an abnormality of the motor when it is confirmed that the magnitude of the current supplied to the motor is equal to or greater than the threshold based on a detection result of the supply current detection unit. The automatic bread maker according to claim 1. The abnormality detection means is to confirm the detection result of the supply current detection means at every predetermined timing,
3. The abnormality of the motor is detected when the abnormality detecting means confirms that the magnitude of the current supplied to the motor is equal to or greater than the threshold value continuously for a predetermined number of times or more. Automatic bread maker described in 1. When the voltage supplied by the power supply means is within a predetermined range,
4. The automatic bread maker according to claim 2, wherein the abnormality detection unit sets the larger threshold value as the voltage supplied from the power supply unit is larger. 5. The power supply means supplies AC power;
The automatic bread maker according to any one of claims 2 to 4, wherein the abnormality detection unit sets the threshold value that can be different depending on the frequency of the AC power supplied by the power supply unit.   The motor is configured to apply rotational power to the driving shaft when pulverizing the grains put into the bread container by a pulverizing blade interlocked with the driving shaft. The automatic bread maker according to claim 5.

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