JP5407929B2 - Automatic bread machine - Google Patents

Description

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

  A commercially available automatic bread maker for home use puts a bread container containing bread ingredients into a baking chamber in the main body, kneads the bread ingredients in the bread container with a kneading blade and kneads (kneading process), after passing through a fermentation process In general, the bread container is used as a baking mold as it is to bake bread (baking process) (see, for example, Patent Document 1).

  When bread is produced using such an automatic bread maker, flour such as wheat or rice (wheat flour, rice flour, etc.) or mixed flour in which various auxiliary ingredients are mixed with such flour. It was common to produce bread by obtaining and using this as a bread-making material.

  However, in general households, as represented by rice grains, grains are sometimes held in the form of grains, not in the form of flour. For this reason, it would be very convenient if bread could be produced directly from grain using an automatic bread maker. For these reasons, the present applicants have developed a method for producing bread using cereal grains as a starting material (see Patent Document 2).

  In this bread manufacturing method, first, cereal grains are mixed with a liquid, and the mixture is pulverized by a pulverizing blade (pulverization step). And the bread raw material containing the paste-form pulverized powder obtained through the crushing process is kneaded into dough with a kneading blade (kneading process), and the dough is fermented (fermentation process), and then baked into bread (baking process).

JP 2000-116526 A JP 2010-35476 A

  The present applicants are developing an automatic bread maker with a new mechanism so that bread can be baked using grain grains as a starting material, and the above-described bread manufacturing method can be performed with a single automatic bread maker. . In this development, we are considering using a blade that is different from the grinding blade that grinds grain and the kneading blade that kneads the dough.

  However, in such a configuration, for example, if the blade must be exchanged between the crushing step and the kneading step, it is very inconvenient for the user who uses the automatic bread maker. In addition, in a case where both blades are set in advance in a bread container so that they do not have to be exchanged during the bread manufacturing process, the kneading blade does not interfere with the grain crushing in the crushing process. In addition, there are various problems in the kneading step, such as the need to configure the grinding blade so as not to interfere with the kneading of the dough.

  Accordingly, an object of the present invention is to provide an automatic bread maker having a convenient mechanism for baking bread from grain grains.

  In order to achieve the above object, the automatic bread maker of the present invention is provided with a bread container into which bread ingredients are charged, a heating means, a baking chamber for housing the bread container, and rotatable at the bottom of the bread container A rotating shaft attached to the motor, a motor that provides rotational power to the rotating shaft in a state where the bread container is housed in the baking chamber, a grinding blade for pulverizing grain, a kneading blade for kneading bread dough, and the A bread unit having a unit shaft that is attached to the rotary shaft in a non-rotatable and detachable manner within the bread container, wherein the blade unit rotates in one direction. When the rotating shaft rotates in the direction opposite to the one direction, the dough is kneaded by the kneading blade. It is characterized by performing.

  According to this configuration, since the two blades (crushing blade and kneading blade) of the blade unit can be used properly depending on the rotation direction of the rotating shaft attached to the bread container, the crushing step and the kneading step are performed. This can be done without blade replacement. And the heating process provided in a baking room can be utilized suitably, the fermentation process which ferments dough, and the baking process which bakes the fermented bread dough to bread can be implemented. In other words, the automatic bread maker having this configuration is very convenient for the user because the bread can be baked from the grain without changing the blade in the middle of the bread making process. In addition, since the blade unit having the pulverizing blade and the kneading blade is detachable from the rotating shaft, it is possible to remove the blade unit from the bread container and wash each blade at the end of the bread making operation. It is very convenient for the user.

  In the automatic bread maker configured as described above, the blade unit is based on the unit shaft, the crushing blade that is relatively non-rotatable and detachably attached to the unit shaft, and the bottom surface of the bread container. A bearing attached to the unit shaft at a position farther from the grinding blade, a concave accommodating portion for accommodating the bearing on the inner surface side, and the kneading blade on the outer surface side, and fixed to the accommodating portion The dome-shaped cover that is attached to the unit shaft via the bearing so as to be relatively rotatable and covers the pulverizing blade, and the bearing that is provided on the inner surface side of the dome-shaped cover and is accommodated in the accommodating portion. Depending on the sealing means for sealing and the rotational direction of the rotary shaft, the rotational power of the rotary shaft is applied to the dome-shaped cover. A clutch for switching between whether reached, good as appreciated by one skilled in the art.

  According to this configuration, it is possible to realize a configuration in which the two blades can be selectively used depending on the rotation direction of the rotation shaft attached to the bread container using a simple clutch. Further, since the grain grains can be crushed in the dome-shaped cover, the grain grains can be efficiently crushed. In addition, the pulverizing blade is detachably attached to the unit shaft, so that mass production is easy and maintenance performance such as blade replacement is excellent.

  Furthermore, since a liquid such as water is put in the pan container, the bearing needs to be sealed so that the liquid does not enter the bearing that allows the dome-shaped cover to rotate relative to the unit shaft. In this regard, in this configuration, since the bearing is accommodated in the concave accommodating portion provided in the dome-shaped cover, the bearing can be sealed if the sealing means is provided only on the inner surface side of the dome-shaped cover, and the bearing is sealed. Therefore, the seal structure can be reduced in size. For this reason, according to this structure, it can suppress that a blade unit exerts a bad influence on the shape of the baked bread.

  In the automatic bread maker having the above-described configuration, the kneading blade is attached to a spindle that is attached to the dome-shaped cover so as to be relatively rotatable, and the clutch is made relatively unrotatable to the unit shaft. A posture of the kneading blade that includes a first engagement body to be attached and a second engagement body that is attached to the support shaft so as not to be relatively rotatable on the inner surface side of the dome-shaped cover, and switches the posture according to the rotation direction of the rotation shaft. It is good also as switching whether the said 1st engagement body and the said 2nd engagement body engage.

  According to this configuration, the clutch that performs the operation of selectively using the two blades can be realized with a simple configuration. And according to this structure, since the structure of a clutch can be simplified, washing | cleaning and a maintenance become easy.

  In the automatic bread maker configured as described above, a guard having a plurality of openings is detachably attached to the dome-shaped cover so as to cover the crushing blade exposed from the dome-shaped cover. Also good.

  According to this configuration, since the user's hand can be prevented from approaching the grinding blade, the user can handle the blade unit more safely.

  In the automatic bread maker configured as described above, the unit shaft is provided so as to cover the rotating shaft, and is opposed to the tip surface of the rotating shaft covered by the unit shaft and the tip surface of the unit shaft. Of the opposing surfaces, a convex portion may be provided in one central portion, and a concave portion that engages with the convex portion may be provided in the other central portion.

  According to this configuration, when the rotation shaft is put on the unit shaft, the rotation center of the rotation shaft and the rotation center of the unit shaft are easily combined. For this reason, according to this structure, when rotating a braid | blade, it is hard to generate | occur | produce rattling etc. and can provide the automatic bread maker which is hard to break down.

  In the automatic bread maker configured as described above, the motor includes a first motor provided for rotating the kneading blade at a low speed and a second motor provided for rotating the crushing blade at a high speed. It is also possible that

  The rotation of the pulverization blade during the pulverization process (high-speed rotation) and the rotation of the kneading blade during the kneading process (high torque, low-speed rotation) require different rotations. For this reason, it is preferable that the motor for rotating each blade is different as in this configuration.

  ADVANTAGE OF THE INVENTION According to this invention, the automatic bread maker provided with the convenient mechanism which can bake bread from a grain grain can be provided. For this reason, according to the present invention, it is expected that home bread making will become popular by making home bread production more familiar.

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. The disassembled schematic perspective view which shows the structure of the blade unit with which the automatic bread maker of this embodiment is provided. 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

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 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. ing. The operation unit 20 includes 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, flour For example, a course for producing bread using as a starting material) and a display unit for displaying time, contents set by the operation key group, errors, and the like. The display unit is configured by, for example, a liquid crystal display panel.

  Moreover, the baking chamber 30 in which the bread container 80 mentioned later for details is accommodated in the main body 10 is provided. The firing chamber 30 is configured in a substantially rectangular box shape having a bottom shape 30a made of, for example, sheet metal and four side walls 30b (see also FIG. 4 described later), and the upper surface thereof 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. 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. In addition, a bread ingredient storage container 42 is attached to the lid 40 so that a part of the bread ingredients can be automatically charged during the bread manufacturing 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. . The bread ingredient storage container 42 is provided so that the container lid 42b can be supported from the outer surface (lower surface) side and the opening of the container body 42a can be kept closed, and the container lid 42 can be moved by an external force. The movable hook 42c provided so that engagement with 42b may be cancelled | released is also provided.

  An automatic closing solenoid (not shown) is provided in the main body 10 on the lower side of the operation unit 20, and when this solenoid is driven, the plunger is opened from the opening 10 b provided in the wall surface 10 a adjacent to the lid 40 of the main body 10. It is designed to protrude. 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. Is opened. FIG. 1 shows a state in which 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 powder bread raw materials (for example, gluten, dry yeast, etc.) stored in the container do not easily remain in the container. And it is preferable that those inner surfaces are covered with a coating layer of silicon, fluorine, or the like, and it is preferable that they are formed smoothly without any unevenness.

  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 is an embodiment of the first motor of the present invention, and the grinding motor 60 is an embodiment of the second 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 formed by the first belt 53 so that the diameter thereof is larger than that of the first pulley 52, and the second pulley 55 is fixed to the upper side of the first rotating shaft 54. It is connected. A second rotating shaft 57 is provided on the lower side of the first rotating shaft 54 so that the center of rotation thereof is substantially the same as the first rotating shaft 54. The first rotating shaft 54 and the second rotating shaft 57 are rotatably supported inside the main body 10. A clutch 56 is provided between the first rotating shaft 54 and the second rotating shaft 57 to perform power transmission and power interruption. 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. 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. The first driving shaft pulley 12 (having substantially the same diameter as that of the third pulley 58). Connected). 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.

  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, the second belt 59, and Hereinafter, the power transmission unit configured by the first driving shaft pulley 12 may be expressed as a first power transmission unit.

  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 coupled to a second driving shaft pulley 13 (fixed below the first driving shaft pulley 12) fixed to the driving shaft 11 by a third belt 63. ing. 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 addition, the power transmission part comprised by the 4th pulley 62, the 3rd belt 63, and the 2nd pulley 13 for driving shafts may be expressed as a 2nd power transmission part below. The second power transmission unit is configured not to 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 at all times.

  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 A in FIG. 2. 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. Then, 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 power is transmitted to the two claws 561a, When 562b does not mesh (the state shown in FIG. 3A), the power is cut off. 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 slidable in the axial direction (vertical direction in FIG. 3) on the first rotating shaft 54 and is attached to the first rotating shaft 54 so as not to be relatively rotatable. ing. 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 of the clutch 56 (switching between the power transmission state and the power cut-off state) is performed by a self-holding solenoid (clutch) in which the arm portion 72 extending in a fixed state from the first clutch member 561 and a permanent magnet 73a is incorporated. For solenoid) 73. The plunger 73 b of the solenoid 73 is in a state where its tip end portion (the lower side corresponds to FIG. 3) is fixed to an attachment portion 72 a provided on the arm portion 72. Since the arm portion 72 (including the attachment portion 72a) is made of metal, it can be attracted to the permanent magnet 73a.

  When a voltage is applied to the solenoid 73 so as to cancel the magnetic field of the permanent magnet 73a from the state of FIG. 3A, the force that attracts the arm portion 72 (more precisely, the mounting portion 72a) of the permanent magnet 73a decreases. The first clutch member 561 is pushed down by the biasing force of the spring 71. As a result, meshing between the claw 561a of the first clutch member 561 and the claw 562a of the second clutch member 562 is obtained, and the clutch 56 transmits power (the state shown in FIG. 3B). ). Since this engagement is maintained by the urging force of the spring 71, the solenoid 73 is turned off after driving to pull down the first clutch member 561. Further, in the state in which this engagement is obtained, the arm portion 72 is pulled down, so that the plunger 73b of the solenoid 73 is in a state in which the amount of protrusion from the housing 73c (the amount of protrusion downward) is increased.

  On the other hand, if a voltage in the direction of pulling up the plunger 73b (a voltage in the direction opposite to the direction canceling the magnetic field of the permanent magnet 73a) is applied to the solenoid 73 from the state of FIG. Thus, the first clutch member 561 is pulled upward together with the arm portion 72. As a result, the engagement between the claw 561a of the first clutch member 561 and the claw 562a of the second clutch member 562 is released, and the clutch 56 performs power shut-off (a state shown in FIG. 3A). ). In the state where the meshing is released, the permanent magnet 73a built in the solenoid 73 attracts the arm portion 72 (more precisely, the mounting portion 72a). For this reason, after the drive for pulling up the first clutch member 561 is performed, the disengagement state can be maintained even if the solenoid 73 is turned off, so that the solenoid 73 is turned off.

  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. The 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. I will try to let you. In this case, since a very large load is applied to the pulverization motor 60, 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 at high speed from being transmitted to the output shaft 51 of the kneading motor 50. The first power transmission unit includes a clutch 56 that cuts off the power.

  As described above, in the automatic bread maker 1, the second power transmission unit is not provided with a clutch, but in this case, the motor is not damaged as described above. This is because even if the kneading motor 50 is driven, the driving shaft 11 is only rotated at a low speed (for example, 180 rpm). Even if the rotational power for rotating the driving shaft 11 is transmitted to the output shaft of the grinding motor 60, the kneading motor 50 is kneaded. This is because a large load is not applied to the motor 50. And the manufacturing cost of an automatic bread maker is suppressed by setting it as the structure which does not dare provide a clutch in the 2nd power transmission part in this way. However, it goes without saying that a clutch may be provided in the second power transmission unit.

  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 (an example of a heating unit) is disposed inside the baking chamber 30 so as to surround the bread container 80 accommodated in the baking chamber 31, and the bread raw material 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 rotating shaft 82 (an embodiment of the rotating shaft of the present invention) extending in the vertical direction is rotatably supported at the center of the bottom of the bread container 80 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 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.

  Protrusions (not shown) are formed on the inner peripheral surface of the bread container support 14 and the outer peripheral surface of the pedestal 83, respectively, and these protrusions constitute a known bayonet connection. That is, when the bread container 80 is attached to the bread container support part 14, the bread container 80 is lowered so that the protrusion of the base 83 does not interfere with the protrusion of the bread container support part 14. Then, after the pedestal 83 is fitted into the bread container support 14, when the bread container 80 is twisted horizontally, the protrusion of the pedestal 83 is engaged with the lower surface of the protrusion of the bread container support 14. Thereby, the bread container 80 cannot be pulled out upward.

  By this operation, the connection (coupling) between the container side coupling member 82a provided at the lower end of the blade rotating shaft 82 and the driving shaft side coupling member 11a fixed to the upper end of the driving shaft 11 is also performed simultaneously. Achieved. By this coupling, the blade rotating shaft 82 can transmit 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 an exploded schematic 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 attached to the unit shaft 91, the crushing blade 92 that is relatively non-rotatable and detachably attached to the unit shaft 91, and the unit shaft 91 that is relatively rotatable and covers the crushing blade 92. And a dome-shaped cover 93 having a substantially circular shape in a plan view (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 90 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. Further, a groove 91a that crosses the unit shaft 91 in the diameter direction is formed on the lower side of the unit shaft 91 (see, for example, FIG. 6). When the unit shaft 91 is fitted (covered) from above the blade rotation shaft 82, a pin (not shown) penetrating the blade rotation shaft 82 horizontally engages the groove 91a, and the unit shaft 91 is attached to the blade. The rotation shaft 82 is connected so as not to be relatively rotatable.

  As shown in FIG. 7B, the upper portion of the unit shaft 91 is engaged with a convex portion 82a provided at the center 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 rotating shaft 82 in a state where the centers of the unit shaft 91 and the blade rotating shaft 82 are aligned, and unnecessary rattling or the like occurs when rotating the blade. This can be suppressed. In this embodiment, the convex portion 82a is provided on the blade rotating shaft 82 side and the concave portion 91b is provided on the unit shaft 91 side. On the contrary, the concave portion is provided on the blade rotating shaft 82 side and the unit shaft 91 side is provided. It does not matter as a structure which provides a convex part.

  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 92 a having a substantially rectangular shape in plan view is formed at the center of the grinding blade 92. The crushing blade 92 is attached from the lower side of the unit shaft 91 so as to fit the unit shaft 91 into the opening 92a.

  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 92a of the grinding blade 92 when viewed from below. Further, the area when the lower side of the unit shaft 91 is viewed from below is slightly smaller than the opening 92a. 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 91 is made of, for example, a die-cast product of aluminum alloy, and accommodates a bearing 95 (consisting of a rolling bearing in this embodiment) on its inner surface side. A concave accommodating portion 931 (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 seal material 97 and the seal cover 98 are embodiments of the sealing means of the present invention.

  On the outer surface of the dome-shaped cover 93, a kneading blade 101 (for example, aluminum) having a planar shape “” is formed by a support shaft 100 (see FIG. 6) arranged 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.

  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, a protrusion 101a (see FIGS. 5 and 6) hanging from the lower edge of the kneading blade 101 abuts on the first stopper portion 93b provided on the upper surface of the dome-shaped cover 93, and the kneading blade 101 is more than that. The dome-shaped cover 93 cannot be rotated counterclockwise (assuming that it is viewed from above). 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. For details, the kneading blade 101 reaches the maximum opening angle when a second engagement body 103b (fixed to the support shaft 100), which will be described later, hits the second stopper portion 93c and cannot rotate.

  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 this embodiment, the washer 104 is arranged between the first engagement body 103a and the seal cover 93 in consideration of prevention of deterioration of the first engagement body 103a. It does not necessarily 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 blade rotation shaft 82 and the dome-shaped cover 93 are connected. 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 disconnects the blade rotation shaft 82 and the dome-shaped cover 93 from each other. 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 guard 106 is attached to the dome-shaped cover 93, the guard 106 comes into proximity with the crushing 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 106 by engaging with the grooves 106 ea the projections 93 f (in the embodiment, a total of eight protrusions arranged at 45 ° intervals) formed on the outer periphery of the dome-shaped cover 93. . 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, the crushing blade 92 and the kneading blade 101 are provided in one unit (blade unit 90), so that the handling 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.

  In the automatic bread maker 1 of the present embodiment, since a liquid such as water is put into the bread container 80, the liquid enters the bearing 95 that allows the dome-shaped cover 93 to rotate relative to the unit shaft 91. The bearing 95 needs to be hermetically sealed. 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 seal cover only on the inner surface side of the dome-shaped cover 93). 98), the bearing 95 can be sealed. 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 includes the operation unit 20, the temperature sensor 15 that detects the temperature of the baking chamber 30, a kneading motor drive circuit 121, a grinding motor drive circuit 122, a heater drive circuit 123, and a first solenoid. The drive circuit 124 and the second solenoid drive circuit 125 are electrically connected.

  The kneading motor driving circuit 121 is a circuit for controlling the driving of the kneading motor 50 under a command from the control device 120. The grinding motor drive circuit 122 is a circuit for controlling the driving of the grinding motor 60 under a command from the control device 120. The heater drive circuit 123 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 124 controls the drive of the automatic charging solenoid 16 that is driven when a part of the bread ingredients is automatically charged in the course of the bread manufacturing process under the command from the control device 120. Circuit. The second solenoid drive circuit 125 is a circuit for controlling the drive of the clutch solenoid 73 (see FIG. 3) that switches the state of the clutch 56 (see FIG. 3) under a command from the control device 120.

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, rotation control of the complementary kneading blade 102, control of rotation of the pulverization blade 92 by the pulverization motor 60 via the pulverization motor drive circuit 122, control of heating operation by the sheathed heater 31 via the heater drive circuit 123, The automatic bread maker 1 controls the operation of the movable hook 42c by the automatic closing solenoid 16 via the solenoid driving circuit 124 and the switching control of the clutch 56 by the clutch solenoid 73 via the second solenoid driving circuit 125. Execute bread manufacturing process.
(Operation of automatic bread machine)
Next, the operation of the automatic bread maker 1 when 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 using the automatic bread maker 1 as an example in the case of producing bread using rice grains as a starting material.

  When using rice grains 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 rice grain breadmaking course, the dipping process, the crushing process, the kneading (kneading) process, the fermentation process, and the baking process are sequentially performed in this order.

  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. And if the bread raw material which should be accommodated is accommodated in the container main body 42a, it will be set as the state by which the opening of the container main body 42a was closed by the container lid 42b by supporting the container lid 42a with the movable hook 42c.

  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. Further, 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. Furthermore, depending on the case, seasonings such as salt, sugar and shortening may be stored in the bread ingredient storage container 42 together with gluten and dry yeast, for example, so as to be automatically introduced during the bread manufacturing process. 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 bread making course for rice grain which manufactures bread using the rice grain as a starting material by the control apparatus 120 is started.

  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 charged in advance into the bread container 80 is left in a stationary state, and this stationary state is maintained for a predetermined time (in this embodiment, 50 minutes). 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, the dispersion | variation in the water absorption degree of a rice grain can be suppressed. Moreover, in order to make immersion time short, you may make it raise the temperature of the baking chamber 30 by supplying with electricity to the sheathed heater 31 at the time of an immersion process.

  In the dipping process, the pulverizing blade 92 may be rotated at the initial stage, and thereafter the pulverizing blade 92 may be intermittently rotated. In this way, the surface of the rice grain can be damaged, and the liquid absorption efficiency of the rice grain can be increased.

  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 high speed in a mixture containing rice grains and water. Specifically, the control device 120 controls the crushing motor 60 to rotate the blade rotation shaft 82 in the reverse direction so that the crushing blade 92 is rotated at a high speed in a mixture containing rice grains and water.

  When rotating the grinding blade 92 using the grinding motor 60, the control device 120 drives the clutch solenoid 73 so that the clutch 56 shuts off the power (the state shown in FIG. 3A). ). This is because, as described above, there is a possibility that the motor is damaged unless it is controlled in this way.

  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 prevented. 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 resistance is changed to the open posture (posture shown in FIG. 9B) due to the resistance received from the mixture containing rice grains and water. When the kneading blade 101 is in the open position, the cover clutch 103 causes the engagement portion 103bb of the second engagement body 103b to deviate from the rotation track of the engagement portion 103ab of the first engagement body 103a (see the broken line in FIG. 8). In addition, the connection between the blade rotation shaft 82 and the dome-shaped cover 93 is disconnected. At the same time, the kneading blade 101 in the open position hits the inner wall of the bread container 80 as shown in FIG.

  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, since the pulverization is performed in the dome-shaped cover 93, the possibility that the rice grains are scattered 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 they can be efficiently pulverized. Further, the rib 93e provided on the dome-shaped cover 93 suppresses the flow of the mixture containing rice grains and water (the flow in the same direction as the rotation of the pulverizing blade 92).

  Further, 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 rushing toward it is convex, the mixture hardly flows to 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 finished, the kneading process is started by a command from the control device 120. In addition, it is necessary to perform this kneading process at the temperature (for example, around 30 degreeC) in which a yeast works actively. For this reason, you may make it start a kneading process when it becomes a predetermined temperature range.

  At the start of the kneading process, the control device 120 drives the clutch solenoid 73 so that the clutch 56 transmits power (state shown in FIG. 3B). Then, the control device 120 controls the kneading motor 50 to rotate the blade rotation shaft 82 in the forward direction. 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). When the engagement portion 103bb of the second engagement body 103b is at an angle that interferes with the rotation path of the engagement portion 103ab of the first engagement body 103a (see the broken line in FIG. 8), the cover clutch 103 is connected, and the dome-shaped cover is formed. 93 enters a state of being driven in earnest by the blade rotation shaft 82. The kneading blade 101 in a folded position with the dome-shaped cover 93 rotates in the forward direction integrally with the blade rotation shaft 82.

  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 is very slow in the initial stage of the kneading process, and is controlled by the control device 120 so that the speed is increased stepwise. 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-ice 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 dough (dough connected to the dough (dough) having the predetermined elasticity is obtained by the rotation of the kneading blade 101 and the complementary kneading blade 102. ) When the kneading blade 101 and the complementary kneading blade 102 shake the dough and knock it against the inner wall of the bread container 80, an element of “kneading” is added to the kneading. The dome-shaped cover 93 is also rotated by the rotation of the kneading blade 101 and the complementary kneading blade 102. When the dome-shaped cover 93 rotates, the rib 93e formed on the dome-shaped cover 93 also rotates, so that the bread ingredients in the dome-shaped cover 93 are quickly discharged from the window 93d, and the kneading blade 101 and the complementary kneading blade 102 are Assimilate into a kneaded bread lump (dough).

  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, the configuration may be such that the end point of the kneading process is determined by using the magnitude of the load of the kneading motor 50 (for example, it can be determined by the control current of the motor) as an index.

  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 and the complementary kneading blade 102 may be rotated to perform degassing or rounding of the dough.

  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.), and in a baking environment for a predetermined time (in this embodiment, 50 minutes). ) Control to bake bread. 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.

In addition, although the burn mark of the kneading blade 101 and the complementary kneading blade 102 (projecting upward from the concave portion 81 of the bread container 80) remains on the bottom of the pan, the dome-shaped cover 93 and the guard 106 are accommodated in the concave portion 81. So that they do not leave a large burn at the bottom of the bread.
(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.

  For example, in the above, the case of producing bread using the rice grain as a starting material by the automatic bread maker 1 has been shown, but the automatic bread maker of the present embodiment uses, for example, wheat flour or rice flour as the starting material. Bread can also be produced. In the case of producing bread using wheat flour or rice flour as a starting material, the grinding blade 92 is unnecessary, and therefore a bread container different from the one shown above (only the kneading blade is attached to the blade rotation shaft). A conventional bread container) may be used.

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

  Moreover, the manufacturing flow of the rice grain breadmaking course shown above is an example, and may be other manufacturing flow. For example, after the pulverization step, the pulverized powder may have a configuration in which the kneading step is performed after the immersion step is performed again in order to absorb water.

  In the embodiment shown above, the automatic bread maker 1 uses a separate motor for the case where the grain is pulverized by the pulverizing blade 92 and the case where the kneading blade 102 is rotated to knead the dough. did. However, the present invention is not limited to this configuration. That is, for example, a configuration in which only one motor is provided, and a configuration in which the same motor is used for pulverizing the grain by the pulverizing blade 92 and rotating the kneading blade 102 to knead the bread dough may be used.

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

1 Automatic bread machine 30 Baking chamber 31 Seeds heater (heating means)
50 Kneading motor (first motor)
60 Crushing motor (second motor)
80 Bread container 82 Blade rotation shaft 82a Convex part (provided on the tip surface of the blade rotation shaft)
90 Blade unit 91 Unit shaft 91b Recessed portion (provided on the inner surface of the unit shaft)
92 Crushing blade 93 Dome-shaped cover 97 Sealing member (part of sealing means)
98 Seal cover (part of seal means)
95 Bearing (bearing)
DESCRIPTION OF SYMBOLS 100 Support shaft 101 Kneading blade 102 Complementary kneading blade 103 Clutch 103a 1st engaging body (a part of clutch)
103b Second engaging body (part of clutch)
106 guard 106d opening (guard opening)
931 housing

Claims (6)

A bread container into which bread ingredients are charged;
A baking chamber provided with heating means and containing the bread container;
A rotating shaft rotatably attached to the bottom of the bread container;
In a state where the bread container is accommodated in the baking chamber, a motor that gives rotational power to the rotating shaft;
A blade unit having a pulverizing blade for pulverizing grains, a kneading blade for kneading bread dough, and a unit shaft that is relatively non-rotatable and detachably attached to the rotating shaft in the bread container;
An automatic bread maker comprising:
The blade unit performs crushing with the crushing blade when the rotation direction of the rotation shaft rotates in one direction, and kneads the dough with the kneading blade when the rotation shaft rotates in a direction opposite to the one direction. An automatic bread maker characterized by performing. The blade unit is
The unit shaft;
The crushing blade that is relatively non-rotatable and detachably attached to the unit shaft;
A bearing attached to the unit shaft at a position away from the grinding blade with reference to the bottom surface of the bread container;
The inner surface side has a concave accommodating portion for accommodating the bearing, the outer surface side has the kneading blade, and is attached to the unit shaft via the bearing fixed to the accommodating portion so as to be relatively rotatable. A dome-shaped cover covering the grinding blade;
Sealing means provided on the inner surface side of the dome-shaped cover and sealing the bearing accommodated in the accommodating portion;
A clutch that switches whether to transmit the rotational power of the rotary shaft to the dome-shaped cover, depending on the rotational direction of the rotary shaft;
The automatic bread maker according to claim 1, comprising: The kneading blade is attached to a spindle that is attached to the dome-like cover so as to be relatively rotatable, and is relatively non-rotatable.
The clutch includes a first engagement body attached to the unit shaft so as not to rotate relative to the unit shaft, and a second engagement body attached to the support shaft so as not to rotate relative to the inner surface of the dome-shaped cover. 3. The automatic bread making according to claim 2, wherein whether or not the first engagement body and the second engagement body are engaged is switched depending on the attitude of the kneading blade that switches the attitude according to the rotation direction of the shaft. vessel.   The dome-shaped cover is detachably attached with a guard having a plurality of openings so as to cover the crushing blade exposed from the dome-shaped cover. Automatic bread maker described. The unit shaft is provided so as to cover the rotating shaft,
Of the front end surface of the rotating shaft covered by the unit shaft and the facing surface facing the front end surface of the unit shaft, one central portion has a convex portion, and the other central portion has the convex portion. The automatic bread maker according to any one of claims 1 to 4, wherein a concave portion that engages with the portion is provided.   2. The motor includes a first motor provided for rotating the kneading blade at a low speed and a second motor provided for rotating the crushing blade at a high speed. To 5. The automatic bread maker according to any one of 5 to 5.