JPS63794A - Tea liquid extractor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention is incorporated into a vending machine, etc., and supplies tea leaves and hot water to a brewing section according to a specified command to produce tea liquid. This invention relates to a tea liquid extraction device for extracting tea liquid.

(Prior Art) Beverage vending machines that extract the extract of coffee powder raw materials with boiling water and supply it as so-called regular coffee are disclosed, for example, in Japanese Patent Publication No. 57-31894 and Japanese Utility Model Publication No. 59-148723. Although various types of regnilla are available, such as black tea, green tea, and oolong tea, there has recently been a desire for legnilla to be used.

The structure of a coffee extraction device is such that coffee powder raw materials and hot water are supplied into an extraction cylinder, which is pressurized by a piston, and the extract is extracted through a filter.

(Problems to be Solved by the Invention) In the case of coffee, the particle size of the raw material powder is quite fine and is housed in a high density in an extraction cylinder. On the other hand, tea leaves, which are the raw material for tea liquid, are steamed leaves and have a certain size, and are not finely divided like the powdered raw material for coffee, so that the hot water does not flow well. It will pass through.

The coffee extraction device disclosed in Japanese Patent Publication No. 57-31894 supplies raw material powder and hot water into a cylinder, and pressurizes them all at once with a piston to extract coffee extract. Since the particle size is fine and it is housed in the cylinder at high density, it is possible to extract the extract. When such an extraction device is used to extract tea liquid, due to the above-mentioned properties of the tea leaves that are the raw material, hot water passes through the tea leaves in a short circuit, leaving the extract unextracted. Only hot water will flow out of the cylinder.

- On the other hand, in the method of Utility Model Application No. 59-148723, a small amount of hot water is supplied into the cylinder together with the raw material powder in the first stage, and then the remaining hot water for extraction is supplied into the cylinder in the second stage. , which is pressurized by a piston, and when such an extraction device is used to extract tea liquid, the tea leaves swell with the supply of hot water in the first stage, thus preventing the short-circuit passage of hot water. be done. However, since the piston is pressurized at the same time as the second-stage hot water is supplied, forced extraction occurs. In the case of coffee, there is no particular problem, but in the case of tea liquid, when forced extraction is performed in this way, there is insufficient contact time between the raw tea leaves and hot water, resulting in a highly concentrated tea liquid. Not only does this cause the tea leaves to become cloudy, but pigments and bitter components that cause turbidity are eluted from the tea leaves, resulting in a decrease in the quality of the tea liquid. This invention aims to solve these problems.

[Configuration of the Invention (Means for Solving the Problems)] In order to solve these problems, the present invention provides a primary hot water supply means for supplying hot water together with tea leaves to an extraction section equipped with a filter, and A secondary hot water supply means that supplies hot water to the extraction section after a pause period, and a secondary hot water supply means that pressurizes the hot water in the extraction section after a secondary pause period until the hot water in the extraction section decreases to a certain amount after the secondary hot water supply. The apparatus is equipped with a pressurizing means.

(Function) The tea leaves are swollen by the primary hot water supply means and are well chewed. Then, the hot water is sufficiently brought into contact with the tea leaves by the secondary hot water supply means, and tea liquid is extracted by the hot water in a so-called drip type during the secondary rest period. When the hot water in the cylinder is reduced to a certain amount, the hot water is pressurized by the pressurizing means and forcibly extruded from the extraction section, completing the extraction.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

In the figure, reference numeral 1 denotes a frame, on which a funnel 2 is supported horizontally, a filter 3 and a backing 4 are attached to the upper surface of the funnel 2, and a lead-out hose 5 is connected to the lower surface of the funnel 2.

A cylinder 6 is disposed above the funnel 2 so as to be movable up and down facing the backing 4, and an introduction gutter 7 is obliquely provided on a part of the peripheral wall on the upper end side of the cylinder 6.
A hot water supply hose 8 is connected to the tip. A raw material canister 9 is provided above the introduction gutter 7, and tea leaves, which are raw materials for black tea, for example, are stored inside this raw material canister 9.
By the operation of the discharge coil 10, a fixed amount of the tea leaves is supplied to the upper surface of the introduction gutter 7 through the chute 11 for each - constant command.

15 is a cam that rotates in conjunction with a motor (not shown), 16 is a cylinder arm, 17 is a piston arm, 18 is a scraper arm, and each of these arms 16.1
7.18 are rotatably supported by the frame 1 via support shafts 19 and 20°21, and the idler wheels 2
2, 23, and 24, respectively, and are adapted to operate in a predetermined state at a predetermined time in accordance with the rotation of the cam 15. The tip of the cylinder arm 16 is connected to the cylinder 6. A piston 25 is slidable inside the cylinder 6, and an O-ring 26 is attached to the outer periphery of the piston 5, and a support rod 27 is inserted from the center of the upper surface.
A cross pin 28 is slidably fitted into the upper end of the support rod 27, and the tip of the piston arm 17 is connected to the cross pin 28. and,
A spring 29 is interposed between the cross bin 28 and the upper surface of the piston 25. Note that 30 is a nut for preventing the cross pin 28 from coming off.

A scraper 31 is horizontally and slidably supported at the bottom of the frame 1, and the tip of the scraper arm 18 is connected to the scraper 31. A scraping piece 32 made of an elastic material is attached to the tip of the scraper 31.

Next, we will discuss the effect.

First, during standby, the cylinder 6 is maintained apart from the upper surface of the funnel 2. When a certain command to promote sales is input in this state, the cam 15 is driven by the motor and rotates counterclockwise, and this rotation causes the cylinder arm 16 to rotate counterclockwise, causing the cylinder 6 to rotate. It descends and comes into close contact with the backing 4 of the funnel 2. Under this condition, a certain amount of tea leaves is supplied from the raw material canister 9 to the upper surface of the outlet gutter 7, and a hot water supply hose 8 is passed through the upper surface of this outlet gutter 7 to provide 10 to 50% of the total amount of hot water used for extraction.
% of hot water is supplied as the primary hot water supply, and this hot water and the tea leaves flow into the cylinder 6 while mixing.
Figure (a)].

After the tea leaves and hot water have flowed into the cylinder 6 in this manner, a certain blank time is left as a time period for the next body to stop.

During this time period, the hot water permeates the tea leaves sufficiently, the tea leaves open and swell, and are thoroughly swallowed. Further, excess hot water flows out into the funnel 2 through the filter 3.

Thereafter, the remaining hot water used for extraction is supplied from the hot water supply hose 8 through the introduction gutter 7 into the cylinder 6 as secondary hot water supply. After the hot water is supplied, there is a certain blank time as a secondary rest period.

Since the tea leaves in the cylinder δ are sufficiently swollen during the above-mentioned primary resting period, the hot water from the secondary hot water supply does not pass through the tea leaves in a short circuit (and does not come into sufficient contact with the tea leaves during the secondary resting period). Since the tea leaves have been sufficiently plucked in advance, the hot water efficiently absorbs the extract of the tea leaves and naturally falls into the funnel 2 through the filter 3 in a so-called drip style. A highly concentrated tea liquid is extracted, but the extraction is not forced extraction using pressure, but is a so-called drip method, so there is no leaching of pigments or bitter components that cause turbidity, and the flavor is improved. Maintained in good high quality.

The secondary rest period ends when the hot water in the cylinder 6 decreases to the upper surface of the tea leaves or close to the upper surface of the tea leaves, after which the rotation of the cam 15 progresses and the piston arm 17 rotates counterclockwise. The piston 25 moves downward, and the remaining hot water in the cylinder 6 is pressurized by the elastic force caused by the compression of the spring 29.

Due to this pressurization, the hot water is quickly pushed out from the cylinder 6 through the filter 3, and the tea leaves are compressed and congealed into a pellet shape (FIG. 2(b)).

After this, the rotation of the cam 15 further progresses, the cylinder arm 16 rotates clockwise, the cylinder 6 rises and separates from the funnel 2, and the scraper arm 18 rotates clockwise, causing the scraper 31 to rotate clockwise. moves to the side where the funnel 2 is placed. As the cylinder 6 rises, tea leaves condensed into pellets remain on the upper surface of the funnel 2, and these tea leaves are placed in the scraper 31.
As a result of this movement, the bullet-like pellets are scraped off via the scraping piece 32 and discarded (FIG. 2(C)). After this, the scraper 31 returns to its original position, and the entire extraction process is completed. The tea liquid extracted in this way is passed through the outlet hose 8 to a mixing bowl (not shown).
Sugar and milk are mixed as appropriate in this mixing bowl, and in this state it is supplied to the sales outlet, where it is sold as a hot drink or as a cold drink with ice chips added. It is something.

By the way, in vending machines and the like, it is necessary to complete extraction within a limited short time. Extracting coffee liquid using the drip method requires a considerable amount of time because the raw material powder is fine as mentioned above, making it impossible to meet the above requirements. As seen in No. 148723, a pressurized method is adopted. In this invention, in the secondary downtime period,
The tea liquid is extracted using the drip method, and although the tea leaves are swollen in the cylinder 6, due to the nature of the tea leaves, the passage of hot water through the tea leaves is relatively slow compared to the raw material powder for coffee. Fast and therefore prompt extraction takes place.

However, after the amount of boiling water decreases to a certain level, the drip speed slows down and the concentration of the extracted tea liquid becomes dilute.
Therefore, you end up wasting your time unnecessarily.

Therefore, in this invention, the secondary rest period ends when the hot water decreases to a certain amount, that is, the drip type extraction is stopped, and after this, the hot water in the cylinder 6 is forced by pressurizing the piston 25. This allows for quick extraction by eliminating unnecessary extraction time.

[Effects of the Invention] As explained above, according to the present invention, a highly concentrated tea liquid can be extracted by ensuring sufficient contact time between tea leaves and hot water, and pigments that cause turbidity can be extracted from tea leaves. It is possible to prevent the elution of bitter and bitter components and maintain good quality, and furthermore, it is possible to achieve rapid extraction by avoiding prolongation of the extraction time.

[Brief explanation of drawings]

FIG. 1 is a time chart according to an embodiment of the present invention, and FIG. 2 is a sectional view showing the structure of the extraction device. 3... Filter, 6... Cylinder (extraction part). Representative for the applicant: Patent attorney Takehiko Suzue 1, Indication of the case, Patent Application No. 1983-144520, 2, Title of the invention: Tea juice extraction device 3, Person making the amendment Relationship with the case: Patent applicant: Toshiba Kikai Corporation 4, Agent UBE Building 7, 3-7-2 Kasumigaseki, Chiyoda-ku, Tokyo.
Contents of the amendment (1) In the first line of page 3 of the specification, the word “supply” has been replaced with “
"After supplying it," he corrected. (2) On the 4th page, line 3, next to ``Insufficient'', add ``Suitable for iced tea, etc.''. (3) On page 9, line 16 of the same page, it says “separate,” and then “
The piston 25 also rises until it is substantially flush with the lower surface of the cylinder 6. ” he added. (4) On page 11, line 13, it says, ``This is a thing.'' Next, it says, ``In the above embodiment, the temporary hot water supply is performed at the same time as the supply of tea leaves, but if the introduction gutter 7 is long. In this case, the Utility Model Application Publication No. 59-1487 mentioned above in the prior art
As in No. 23, after supplying tea leaves in advance in a fixed quantity,
It is desirable to continue supplying hot water. In short, any method may be used as long as the tea leaves can be properly swollen within the cylinder 6 by temporarily supplying hot water. ” he added.

Claims (1)

[Claims] In an apparatus that supplies tea leaves and hot water to an extraction section equipped with a filter and extracts tea liquid through the filter, a primary hot water supply means supplies tea leaves and hot water to the extraction section, and an extraction section after a primary rest period after the primary hot water supply. and a pressurizing means that pressurizes the hot water in the extraction part after the secondary hot water supply, during a secondary pause period until the hot water in the extraction part decreases to a certain amount. A tea liquid extraction device featuring: