JPH0316582Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The invention is an automatic water pouring device used for brewing coffee, etc. This invention relates to an automatic pouring device that pours hot water by letting it flow naturally.

(Prior art) Conventionally, this type of automatic pouring device simply pours hot water by letting it flow out naturally using the method described above, so the pouring is done continuously in an almost constant state. Only. When pouring hot water by hand when brewing coffee, etc., in order to improve the extraction effect, that is, the aroma and taste, the material should be soaked in hot water for a certain period of time to prevent gravity flow. It was said that the water should be steamed and then poured again.
The pouring of hot water is adjusted. However, continuous pouring of hot water by natural outflow as described above does not allow for ideal pouring like manual pouring.

On the other hand, a method in which this is done automatically is known from Japanese Patent Laid-Open No. 53-4670. This device is designed to fully automatically perform the necessary operations such as grinding coffee beans, supplying the powder, swelling by initial pouring of hot water, and extraction of coffee by main pouring.

(Problem to be solved by the invention) However, the above-mentioned known example performs complicated sequence control, and also controls the start and stop of initial pouring of hot water for steaming and the start of hot water supply for brewing coffee. This requires complicated control using a unique movement of the nozzle and a timer. This makes it expensive. Furthermore, since the water continues to be heated while the hot water supply is stopped, it may cause an abnormal pressure rise, so the cost may increase due to the use of a pressure vessel, and care must be taken when handling it. Therefore, it is not suitable for home use.

Therefore, the object of the present invention is to provide an automatic pouring device with a simple structure that can temporarily stop pouring without causing an abnormal pressure increase, thereby solving the problems of the conventional method. .

(Means for solving the problems) In order to achieve the above problems, the present invention
In an automatic hot water pouring device in which a hot water storage tank that heats water to raise its temperature and pressure is connected to a hot water pouring pipe that sends out hot water by increasing the pressure, the hot water storage tank is provided with an internal pressure relief part having an on-off valve, The present invention is characterized in that a timer means is provided for temporarily stopping pouring by opening a valve for a predetermined period of time after a predetermined period of time has elapsed from the pouring start state.

(Function) The timer means is initially inactive and closes the valve of the internal pressure relief part of the hot water storage tank, so the hot water storage tank is in a sealed state. When the content liquid is pressurized in this state, the temperature of the content liquid increases and the internal pressure increases. Hot water can be poured as the pressure increases after the content reaches a boiling point and the hot water is pushed out through the pouring pipe connected to the hot water storage tank. When a predetermined period of time has elapsed after the start of pouring, the timer means operates and opens the valve for a certain period of time, opening the hot water storage tank, reducing the internal pressure, and stopping the extrusion of hot water. Therefore, the pouring of hot water can be temporarily stopped, and after a certain period of time has elapsed, the timer means is deactivated and the valve is closed, and the hot water storage tank is returned to the sealed state and the liquid inside is pushed out again by increasing the pressure. A steaming state can be obtained until pouring is restarted.

(Example) An embodiment of the present invention will be described with reference to FIGS. 1 to 4. As shown in Figures 1 and 2,
A hot water tank 14 having a heater 13 is installed next to the heat retaining part 2 of the base 1. The pouring pipe 16 extending from the bottom of the tank 14 stands up on the side of the heat retaining section 2 of the tank 14, and the tip pouring port 16b opens downward above the heat retaining section 2. Pouring spout 16b
A splash prevention cover 71 is provided, and 16c and 16d indicate splash prevention communication holes. The tank 14 is provided with an inner lid 72 that closes its mouth, and an outer lid 74 that suspends the inner lid 72 with a pin 73. It is pivoted so that it can be opened and closed. The inner lid 72 is provided with an internal pressure relief pipe 76. When this pipe is closed, the pressure inside the tank 14 is increased as water is heated, and when a certain pressure is reached, hot water is pushed out through the pouring pipe 16, and when it is opened, the pressure inside the tank 14 is increased. The internal pressure is released to stop the hot water from being pushed out.

A valve 77 is provided on the outer lid 74 for opening and closing the internal pressure relief pipe 76 to stop pouring and release the stoppage.
and a timer means 78 as shown in FIGS. 3, 4, and 5 for controlling the opening and closing of this valve 77. The valve 77 is connected to the internal pressure relief pipe 7 of the outer cover 74.
6 is integrally formed with a vertically movable member 81 fitted into a holding hole 80 opened next to a through hole 79 protruding to the upper surface, and is in contact with and separated from an elastic mouth rim 82 at the upper end of the internal pressure relief tube 76 . It is designed to open and close. The vertically moving member 81 has an upper end piece 8 having a valve 77.
A spring 83 acting between 1a and the outer surface of the outer lid 74 urges the valve 77 upwardly to keep the valve 77 open at all times.

A cam follower 25 for the cam 24 connected to the timer means 78 is attached to the lower end passive piece 81b of the vertically moving member 81, and the valve 7 is connected to the cam 24 connected to the timer means 78.
7 is controlled to open and close by a timer means 78 to achieve a predetermined intermittent pouring.

Reference numeral 84 indicates a manual operation section of the vertically movable member 81, 85 indicates a cover of the valve 77, and 86 indicates a transparent window thereof.

As shown in FIG. 3, the timer means 78 is a mechanical timer using a spring spring 21 as a driving source, and a cam 24 is connected to its timekeeping shaft 22 via a reduction gear mechanism 23.

The opening and closing of the valve 15 is controlled by the cam 24. A part of the lever 26 is pivoted by a horizontal shaft 28 to a support fitting 27 attached to the lower surface of the bottom of the hot water storage tank 14 by spot welding, etc. Fitted onto the outer periphery of the small diameter portion and engaged from below with the downward annular stepped portion 18a between the upper half large diameter portion;
The valve 15 is pushed open only when the tube 18 is pushed up against the spring 20. The operating end 26b of the lever 26 opens the window 2 to the front of the automatic pouring head 3.
9 so that the valve 15 can be opened and closed by manually operating the lever 26.

The cam follower 25 is connected to the operating end 26 of the lever 26.
It is a roller that is pivotally supported at the tip of a passive lever 31 that is attached to a portion of the b side with one end pivotally supported by a shaft 30.

An operating knob 34 attached to the clock operating shaft 22 of the timer means 78 is located on the front surface of the outer lid 74.

The cam 24 has an outer circumferential surface on which the cam follower 25 comes into contact with the cam follower 2 at the start of the timer timing operation.
5, a position facing the cam follower 25 when an initial predetermined time has elapsed from the start of the timer timing operation, and a position facing the cam follower 25 at the end of the timer timing operation, respectively.
push release notches 24a, 24b for releasing the downward push of the cam follower 25 by the cam 24;
24c is formed, and the other part is the cam follower 2.
protruding circumferential surface 24 that maintains a downwardly pushed state relative to 5;
It is said to be d.

The timekeeping operation shaft 22 is connected directly or indirectly as shown in the figure to a timekeeping mechanism consisting of a combination of an escape wheel 35 and an escapement 36 that engages therewith, and is connected to an actuator of a solenoid 37. The stepped locking piece 38 made of a spring moves back and forth to press the back of one end of the escapement 36 and release the pressure, and the pressing keeps the claw at one end of the escapement 36 engaged with the escape wheel 35. Escape wheel 35
The rotation by the spring 21, that is, the timekeeping operation is stopped. The locking piece 38 is adapted to press the escape 36 when the solenoid 37 is in the OFF state.

As shown in FIG. 4, a pouring switch 39 provided in the energizing circuit of the heater 13 is linked to the timing operation shaft 22, and when the timing operation shaft 22 is at the timing operation end position, the switch 39 is turned off. During the timekeeping operation, the switch 39 is kept on. The energizing circuit includes a hot water storage tank 1
A thermostat 40 that turns off when the water in the thermostat reaches a predetermined temperature, for example 100° C., is provided, and a current supply circuit for the solenoid 37 is provided in parallel with the thermostat 40. Reference numeral 41 in FIG. 4 is a temperature fuse, which is provided around the hot water storage tank 14 together with the thermostat 40.
12 is a power switch.

Normally, the timing operation shaft 22 and the cam 24 are in the timing operation end position, that is, the knob 34 is opposite the set-off position display 42, and the thermostat 40 is in the on state because the hot water storage tank 14 is at room temperature. .

When pouring hot water, the server 11 is placed on the heat retaining part 2 of the base 1, and the filter cup 43 is placed on the server 11, respectively. Further, a filter 44 is fitted into the filter cup 43, and an extraction material 45 is contained therein. Further, water is stored in the hot water storage tank 14.

In this state, turn on the power switch 12 and turn the operating knob 34 in the direction of the arrow a in FIGS. match. As a result, while the heater 9 is energized, the cam 24 is rotated by a predetermined angle in the direction of arrow b, and faces from the notch 24c on the outer periphery to the next notch 24c beyond the notch 24b. The partially protruding circumferential surface 24d presses the cam follower 25 to temporarily close the valve 77, but since the temperature of the liquid content has not increased, the liquid content is not pushed out due to pressure increase. The cam follower 25 engages in the notch 24c, and together with the vertically moving member 81, keeps the settling valve 77 open.

In conjunction with the timer setting operation, the pouring switch 39 in FIG. 4 is turned on. As a result, the heater 13 is energized and the water in the hot water tank 14 is also heated. It should be noted that the solenoid 37 is in an inoperative state because its energizing circuit is short-circuited by the on state of the thermostat 40, and the locking piece 38 maintains the inoperable state of the timing mechanism. When the water in the hot water storage tank 14 reaches a predetermined temperature, the thermostat 40 is turned off and the short circuit to the energized circuit of the solenoid 37 is released. As a result, the solenoid 37 is energized, and the locking piece 38 is moved by the arrow c in FIG.
direction, and release the pressure on the escape 36.

Once the pressure is released, the escape 36 becomes free.
Due to the rotational force received by the spring 21 of the escape wheel 35 in the direction opposite to the arrow a, the pawl at one end that is engaged with the escape wheel 35 is pushed out while the pawl at the other end is engaged with the escape wheel 35. The rocking is repeated, and the spring 21 allows the escape wheel 35 to rotate at a predetermined speed in the direction opposite to the arrow a. This is a so-called timing operation, and the cam 24 is also rotated at a predetermined speed in the direction opposite to the arrow b.

With this rotation, the cam 24 pushes the cam follower 25 downward while riding on the protruding circumferential surface from the notch 24c to the notch 24b side, so that the pushing motion causes the vertically moving member 81 to move downward against the spring 83. The valve 77 is closed. At this time, the water in the hot water storage tank 14 is hot water that has reached a predetermined temperature, and when the valve 77 is closed, the pressure inside the hot water storage tank 14 is increased and the hot water is forced out through the pouring pipe 16. As a result, pouring of molten metal into the filter cup 43 is started when the timer starts counting. When a predetermined period of time has elapsed since the start of this pouring, the outer peripheral notch 2 of the cam 24
4b faces the cam follower 25 and drops it into the notch 24b, so the cam follower 25
Temporarily release the downward pressure on. Along with this, the pushing and closing operation of the valve 15 via the vertically moving member 81 is also temporarily canceled, and the internal pressure in the hot water storage tank 14 is reduced to atmospheric pressure, so that pouring of hot water is temporarily stopped.

The time until this pouring is temporarily stopped is set in accordance with the amount of hot water required to pour enough hot water into the extraction material in the filter cup 43 to an extent that does not cause gravity flow; While pouring is stopped, steam the extraction material. The pouring temporary stop time for this steaming is also set appropriately. After the temporarily set time for pouring molten metal has elapsed, the cam 24 rides the cam follower 25 on the protruding circumferential surface 24d on the side of the notch 24c from the notch 26b and presses it downward, so that the valve 77 is moved again via the vertically moving member 81. It is closed and pouring into the filter cup 43 is restarted.

The restarted pouring is performed on the extracted material after it has been steamed for a predetermined period of time, and the ideal pouring as compared to manual pouring is automatically achieved, making it possible to make delicious coffee and the like.

At the final stage of pouring, the outer peripheral notch 24 of the cam 24
This is done by setting the time from when c opposes the cam follower 25 and causes it to fall, until the valve 15 returns to the open state. However, depending on the amount of water supplied to the hot water storage tank 14, the pouring of hot water can be completed even if the valve 15 does not return to the closed state, and the amount of water supplied may be adjusted according to the amount of extraction material.

When the timing operation shaft 22 and the cam 24 return to the timing end position, the pouring switch 3 is activated in conjunction with this.
9 is turned off.

If an intermediate pouring stop notch 24e is provided at one or several locations between the outer peripheral notches 24b and 24c of the cam 24 as shown by the imaginary lines in FIGS. 1 and 3, pouring after steaming can be stopped. It can be temporarily interrupted at a predetermined time. This is often done by hand pouring, which is done after steaming the extraction material, but once it reaches the point where it almost overflows, it is stopped, and when the surface has descended and settled down, it is poured again in the same way. Intermittent pouring of hot water into the ivy is also possible. Of course, such intermittent pouring can be electrically controlled.

The embodiment of the present invention shown in FIG. 5 uses an electric timer means 52 for stepping by a motor 51, and the cam 24 of the above embodiment is directly or indirectly connected to the motor 51. The timer means 52 includes a pouring switch 53 which is turned off when the timer 24 is at the end of time measurement and turned on at other times, and also serves as an energization switch for the heater 13. In this embodiment, even if the switch 53 is turned on when the cam 24 is operated to the set-on position, the motor 51 is short-circuited and does not operate because the thermostat 40 is in the on-state. When the water in the hot water storage tank reaches a predetermined temperature and the thermostat 40 is turned off, the motor 51 is activated.
The cam 24 is driven at a predetermined speed toward the time measurement end position, and pouring of metal is controlled in the same manner as in the previous embodiment. cam 24
When reaches the timing end position, the switch 53 is turned off, and the heater 13 and motor 51 are turned off.

Note that 16b in FIGS. 1 and 2 is the pouring pipe 1.
No. 6 spout 16c and 16d respectively indicate splash prevention holes around spout 16b.

(Effects of the invention) According to the invention, since it has the above-mentioned configuration and operation, the steaming operation by temporarily interrupting pouring at a predetermined point can be achieved by simple control using a timer operation from the time when pouring starts. , cost reduction can be achieved. In addition, since the temporary suspension of pouring is achieved by lowering the pouring pressure by opening the hot water storage tank to the atmosphere, there is no need to worry about an abnormal pressure increase as would occur if pouring was forcibly stopped by closing the pouring path. Since it is not necessary, it can be used easily and safely.
Special measures and costs are unnecessary.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view of the first embodiment of the present invention, Fig. 2 is an external perspective view, Fig. 3 is a perspective view showing the timer means, Fig. 4 is an electric circuit diagram, and Fig. 5 is the present invention. FIG. 2 is an electrical circuit diagram showing a second embodiment of the present invention. 13...Heater, 14...Hot water storage tank, 16...
...Pouring pipe, 72...Inner cover, 77...Valve, 76...
Internal pressure relief pipe, 78...timer means, 24...cam.

Claims (1)

[Scope of claim for utility model registration] A hot water storage tank that heats water to raise its temperature and pressure.
In the automatic pouring device connected to the hot water pouring pipe that pumps hot water by increasing the pressure, the hot water storage tank is provided with an internal pressure relief part having an on-off valve, and the valve is opened for a certain period of time after a predetermined period of time has elapsed from the start of pouring. An automatic pouring device characterized by being provided with a timer means for temporarily stopping pouring.