JPH0450812B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a rice cake making machine that automatically makes rice cakes after steaming glutinous rice in the same hopper.

Conventional technology In general, this type of mochi pounding machine steams sticky rice in a hopper using steam led from a steam tank, and then manually switches the power to the motor to rotate the blades installed at the bottom of the hopper. By driving it, pounding of mochi was performed.

Various ideas have been made in the past regarding automatic switching from the "musu" process to the "tsuke" process. For example, the one shown in Japanese Utility Model Publication No. 50-23026 was constructed with an electric control circuit as shown in FIG.

In the figure, numeral 1 indicates a thermoswitch installed in the steam tank, and this thermoswitch 1 has a heater 2 installed in the steam tank on the set side S.
is connected to the reset side R, and a series circuit consisting of a motor switch 3 and a motor 4 that rotationally drives the blades installed at the bottom of the hopper is connected, and a series circuit of a buzzer switch 5 and a buzzer 6 is connected in parallel to this series circuit. The circuit is connected. That is, when the thermo switch 1 is set to the set side R,
At the completion of the "Musu" process, the thermo switch 1 detects the temperature rise in the steam tank, switches the energization from the heater 2 side to the motor 4 and buzzer 6 sides, and automatically shifts to the "Turn on" process. Ta.

Problems to be Solved by the Invention Generally, a steam tank is equipped with an automatic temperature controller. However, in this type of automatic switching between "Musu" and "Tsuke", the temperature of the steam tank drops during the "Tsuke" process, and as a result, the automatic temperature regulator returns to normal and energizes the heater 2 side again. It turns out. One possible way to prevent this is to lower the return temperature of the automatic temperature controller, but in this case, it is almost impossible to set the return temperature, considering the return time in a low-temperature atmosphere and during continuous use.

Therefore, in the conventional example described above, a thermoswitch 1 is provided in place of the automatic temperature controller to prevent the temperature from returning to the heater 2 side. However, the thermoswitch 1 has a more complicated structure than an automatic temperature controller, and furthermore, the position of the operating knob for operating the thermoswitch 1 is limited, and an operating piece from the operating knob to the thermoswitch 1 is required. The structure was complex and not very productive.

SUMMARY OF THE INVENTION In view of the above-mentioned conventional problems, it is an object of the present invention to provide a mochi pounding machine that has a simple configuration and is capable of automatically switching from the "musu" to the "tsuke" processes.

Means for Solving the Problems In order to solve the above problems, the present invention provides a simple system that detects the temperature rise during dry firing of the steam tank and switches the energization from the heater to the motor that rotates the blades. A steaming circuit in which a temperature controller equipped with a pole double-throw terminal is connected in series with a steaming switch that turns on and off electricity to the heater and the heater via the normal temperature closed terminal of the temperature controller, and the temperature controller. An automatic changeover switch that opens and closes in conjunction with the steaming switch via the normal temperature open terminal of the steamer and a motor are connected in series, and an auxiliary heater provided thermally in the temperature controller and the steaming switch are connected in series. an automatic switching circuit comprising a series body connected in parallel to the motor and including the steaming circuit;
The mochi-pounding circuit is composed of a mochi-pounding switch and a mochi-pounding circuit connected in series with the motor.

Effect With the above configuration, it is possible to automatically switch from the "Musu" process to the "Tsuku" process, and the temperature controller is kept warm by the heat generated by the auxiliary heater during the "Tsuku" process during automatic switching. Therefore, there is no possibility that the temperature regulator returns during execution of the "turn on" process and interrupts the "turn on" process.

Embodiments Hereinafter, embodiments of the present invention will be described based on FIGS. 1 to 4.

In the figure, 11 is the main body, 12 is a synthetic resin top frame that covers the upper opening of the main body 11, and serves as both a steamer and a rice cake making bowl, and also covers a hopper 13 whose inner surface is coated with fluororesin. It is formed.
14 is a lid of the hopper 13, and 15 is a blade made of synthetic resin housed in the center of the bottom of the hopper 13, and this blade 15 is detachably connected to the rotating shaft of a motor 16 housed in the lower part of the main body 11. 17
1 is a steam tank that has a steam generation chamber in the lower part of the ceiling frame 12 and has its inner surface treated with fluororesin.A sheathed heater 18 is attached to the outer bottom of the steam tank 17, and a sheathed heater 18 is installed in the center part. is provided so as to pass through the rotation shaft of the motor 16. Reference numeral 19 denotes a heat-sensitive plate made of a good thermal conductor such as an aluminum plate and formed into a substantially L-shape. A temperature regulator 20 is mounted on the front surface of the heat-sensitive plate 19, and a non-flammable box-shaped wire-wound fixed resistor 21 (hereinafter referred to as fixed resistor) serving as an auxiliary heater is mounted on the back surface of the heat-sensitive plate 19. They are respectively disposed heat-sensitively in the vicinity of the vessel 20. 22 is a fitting for mounting the fixed resistor 21; 23 is a temperature fuse for cutting off power to the sheathed heater 18 and motor 16 in the event of a short-circuit failure of the temperature regulator 20; and 24 is a holding fitting for the temperature fuse 24.

Here, the mounting boss 17 of the steam tank 17
Thermal conduction due to contact between the temperature controller 20 and the one end 19a of the heat sensitive plate 19
The contact area is set so as to be lower than the heat conduction with 9b.

Reference numeral 25 denotes a hopper mounting plate provided on the outer bottom of the hopper 13, and the hopper mounting plate 25 is removably engaged in an airtight manner via a packing 26 provided at the upper end of the steam tank 17. 27 is a lid opening device that opens the lid 14 by rotation of the motor 16.

Next, the electric circuit shown in FIG. 1 will be explained. 30
is a switch body, consisting of a steaming switch 31, a mochi making switch 32, and an automatic changeover switch 33 for automatically switching between "musu" and "tsuke". In addition, when operating the automatic changeover switch 33, the steaming switch 3
1 is also closed at the same time. 20 is a single-pole double-throw type temperature controller, and this temperature controller 20 has a common terminal 20a.
A normal temperature closed terminal 20b and a normal temperature open terminal 20c are provided. That is, when a predetermined temperature is reached, the electrical circuit is switched from the normal temperature closed terminal 20b side to the normal temperature open terminal 20c side. Further, when the temperature drops to a predetermined temperature, it automatically returns to the normal temperature closed terminal 20b side. The steaming circuit 35, which is closed by the steaming switch 31 of the switch body 30, is connected to the temperature controller 2 via the temperature fuse 24.
It is composed of a series circuit that connects the sheathed heater 18 and the steaming switch 31 via a common terminal 20a of the terminal 20a and a normal-temperature closed terminal 20b. Also mochi pounding circuit 3
6 is a temperature fuse 24 and a mochi making switch 32
It consists of a series circuit that connects the motor 16 via the motor 16. The automatic switching circuit 37 for "Musu" and "Tsuku" is a series circuit that connects the automatic switching switch 33 and the motor 16 via the steaming circuit 35 and the normal temperature open terminal 20c of the temperature regulator 20.
It consists of a fixed resistor 21 and a series body of the steaming switch 31 connected in parallel between the motor 16.

The operation of the mochi pounding machine constructed as described above will now be explained.

First, put a predetermined amount of water into the steam tank 17,
Put the glutinous rice into the hopper 13 and complete the preparation.

And when you do "Musu" and "Tsuku" in succession,
When the automatic switch 33 is operated and the steaming switch 31 is closed, the sheathed heater 18 starts to be energized, and the glutinous rice is steamed in the hopper 13 by steam, and the "musu" process begins. When the evaporation of the water in the steam tank 17 is completed after a predetermined period of time has elapsed, the temperature of the steam tank 17 rises rapidly, and heat is transferred to the temperature controller 20 via the heat sensitive plate 19. At this time, the temperature regulator 20 detects this conductive heat and switches the energization path from the normal temperature closed terminal 20b to the normal temperature open terminal 20c side, stops the energization to the sheathed heater 18, and also stops the energization to the motor 16 and the fixed resistor 2.
1 is energized. As a result, a continuous and automatic "attachment" process begins. Note that at the start of this "sticking" process, the hopper 1 is opened by the lid opening device 27.
Open the lid 14 of 3.

According to the inventors' experiments, the sheathed heater 1
8 is 650W and the fixed resistor 21 is set to 20W, when the "attachment" process begins, the temperature stabilizes at around 100℃ in the "musu" process as shown in Figure 4, and then rises to the operating temperature. The temperature of the temperature controller 20 does not follow the temperature drop of the steam tank 17, but due to the conduction heat from the fixed resistor 21, the temperature reaches 120°C.
The front and back are almost always kept warm.

Here, the temperature regulator 20 in the "turn on" process,
Looking at the temperature changes at the mounting boss 17a of the steam tank 17 and the one end 19a of the heat-sensitive plate 19, which is the attachment part to the steam tank 17, the temperature difference between the temperature regulator 20 and the one end 19a of the heat-sensitive plate 19 is as follows. The temperature difference between the mounting boss 17a of the steam tank 17 and one end 19a of the heat sensitive plate 19 is small, that is, the conduction heat from the fixed resistor 21 is reduced in conduction to the steam tank 17, and the temperature controller 2
This indicates that it is working effectively to keep the temperature at 0. When the "pounding" process has elapsed for a predetermined period of time, the rice cake rises in the hopper 13 and the pounding of the rice cake is completed.

Next, when performing only the "musu" step, the steaming switch 31 is closed and the steaming is completed after a predetermined period of time has elapsed in the same manner as above. In addition, when the "musu" process is completed, the temperature controller 2 is
0 is activated, but since the automatic switch 33 is not closed, the sheath heater 18 only stops energizing it and does not shift to the "turn on" process.

Moreover, when performing only the "making" process, the mochi pounding switch 32 is closed and the motor 16 is energized directly without going through the temperature regulator 20. In this case, the fixed resistor 21 is not energized because the steam switch 31 is not closed. In addition, when performing only the "turn on" process as described above, the temperature regulator 20 does not operate, so it does not return during the "turn on" process, and therefore the temperature regulator 20 is kept warm. do not have to.

As described above, according to this embodiment, the heat-sensitive plate 19 having the temperature regulator 20 on the front surface and the fixed resistor 21 on the back surface is attached to the mounting boss 17a of the steam tank 17. , in this case, the temperature regulator 20 and one end 19a of the heat sensitive plate 19
Since the structure is such that the heat conduction between the mounting boss 17a of the steam tank 17 and one end 19a of the heat-sensitive plate 19 is lower than that between It operates by reliably sensing the sudden temperature rise of the steam tank 17, and in the "turning" process, the heat generated by the fixed resistor 21 provided on the back side does not escape to the steam tank 17 side, making it effective. Since the temperature regulator 20 is kept warm during the process, even at low temperatures in the middle of winter, the temperature regulator 20 does not return to its original state during the "setting" process, and as a result, it is possible to pound rice cake without failure.

Effects of the Invention As is clear from the above description, according to the present invention, a single-pole dual-polar system detects a temperature rise during dry firing of a steam tank and switches the energization from the heater to the motor that rotates the blades. A steaming circuit in which a temperature regulator equipped with a throw-type terminal, a steaming switch that turns on and off electricity to the heater and the heater via a normal temperature closed terminal of the temperature regulator are connected in series; A series body in which an automatic changeover switch that opens and closes in conjunction with the steaming switch via a normal temperature open terminal and a motor are connected in series, and an auxiliary heater thermally provided in the temperature controller and the steaming switch are connected in series. The automatic switching circuit includes the steaming circuit connected in parallel to the motor, and the mochi making circuit includes the mochi making switch and the motor connected in series.
It is possible to automatically switch from the "Musu" process to the "Tsuku" process, and the temperature controller does not return during the "Tsuku" process during automatic switching, and it is possible to switch only the "Musu" process or the "Tsuku" process. It has various excellent effects, such as being able to perform stroke-only operation, and stopping power supply to the auxiliary heater only during the "turn on" stroke.

[Brief explanation of the drawing]

Fig. 1 is an electric circuit diagram of a mochi making machine showing an embodiment of the present invention, Fig. 2 is a vertical cross-sectional view of the mochi making machine, and Fig. 3 is a longitudinal sectional view of the mochi making machine.
The figure is a longitudinal cross-sectional view of the main parts of the mochi making machine, Figure 4 is a graph showing temperature changes in the main parts of the mochi making machine, and Figure 5 is a graph showing temperature changes in the main parts of the mochi making machine.
The figure is an electrical circuit diagram of a conventional mochi pounding machine. 13...Hopper, 15...Blade, 16...Motor, 17...Steam tank, 18...Sheath heater, 19...Thermosensitive plate, 20...Temperature controller, 21...Fixed resistor, 20a... shared terminal,
20b...Normal temperature closed terminal, 20c...Normal temperature open terminal,
31...Steaming switch, 32...Mochi making switch, 33...Automatic changeover switch, 35...Steaming circuit, 36...Mochi making circuit, 37...Automatic changeover circuit.

Claims (1)

[Claims] 1. A hopper with mochi pounding blades built into the bottom, a steam tank equipped with a heater that generates steam guided into the hopper, and a system that detects the temperature rise of this steam tank during dry baking and turns on electricity to the heater. A temperature controller equipped with a single-pole, double-throw terminal that switches the energization to the motor that rotationally drives the blades, and a steamer that opens and closes the energization to the heater and the heater through the normal temperature closed terminal of the temperature controller. A steaming circuit connected in series with a switch,
An automatic changeover switch that opens and closes in conjunction with the steaming switch via a normal temperature open terminal of the temperature regulator and a motor are connected in series, an auxiliary heater thermally provided in the temperature regulator, and the steaming switch. A mochi making machine comprising: an automatic switching circuit including a steaming circuit in which a series body connected in series is connected in parallel to the motor; and a mochi making circuit including a mochi making switch and the motor in series. .