JPS619789A - Extractor for ground coffee vending machine - 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] [Technical field to which the invention pertains] This invention relates to a vending machine (hereinafter referred to as "ground beans") that compresses poured ground coffee beans (hereinafter referred to as "ground beans") and extracts a coffee stock solution to produce a coffee drink. (referred to as vending machines).

[Prior art and its problems]

FIG. 3 is a block diagram of this type of extractor, in which figure (a) is an external view of the main body, and figure (b) is a block diagram of the entire main part including a vertical section of the cylinder. Further, FIG. 4 is a diagram showing the operation sequence of FIG. 3.

In FIG. 3, 2 is a spatially fixed cylinder that accommodates ground beans supplied from a ground bean supply device (not shown) and hot water supplied from the same pouring device (not shown). The filter block is placed on the bottom of the cylinder and is driven in the vertical direction as described below.1 is a piston that compresses the poured ground beans.The filter block 3 is a filter with many pores on its top surface. 31, the piston is brought into close contact with the bottom of the cylinder 2 when performing the above-mentioned compression, and the raw coffee liquid extracted from the filter 31 is taken out from the extraction hole 32, and is mixed with other raw materials using a device not shown in the drawings according to the customer's request. 6 is a brewing mechanism operation motor, which moves the piston 1 and filter block 3 as shown by the arrow by means of mechanisms such as links and cams (not shown) (only the interlocking relationships are shown by dotted lines). It reciprocates in the vertical direction.The solid arrow line indicates the direction of operation in the extraction operation process, and the dotted arrow line indicates each movement direction in the cleaning operation process for coffee beans or beans (hereinafter referred to as bean grounds). direction)
5 is a scraper motor that reciprocates the scraper in the front and back direction (arrow). 7 is a position detection switch, and the filter block 3 is
It is determined that the has been lowered to a predetermined position (standby position).

Based on this determination, the scraper 4 is driven forward, performs the scraping operation described above, and returns to its old standby position (see Figure 3 (b).
) Return to position ).

Next, the operation shown in FIG. 3 will be supplementarily explained with reference to FIG. 4.

In the standby state, the piston 1 is approximately at the -E dead center (fully raised state), and the filter block 3 is in a state where the position detection switch 7 is pressed (fully descended state). When the coffee beverage sales operation starts from this standby state, the a contact 81 is turned on via means not shown. As a result, the extraction mechanism operating motor 6 starts operating, and after closing the extraction mechanism self-propelled switch 8 (not shown) that is linked to the motor 6, the a contact 81 is turned OFF.
The operation continues even after becoming FF, and the extraction operation process (
The piston 1 descends and the filter block 3 ascends) and then enters the cleaning operation stroke.

In this latter stroke, as described above, the filter block 3 descends (the piston 1 rises) and the position detection switch 7 is pressed, thereby turning on the a contact 7a. As a result, the auxiliary relay X1 and the timer T are energized, and the a contact Xla of the auxiliary relay X1 is turned on. For this reason, the scraper motor 5 starts operating, turns on the a contact 9a of the scraper self-propelled switch 9 (not shown) that is interlocked with the motor 5, and turns on the b contact 9b.
0FF-j.

Almost immediately after this, timer T times up and
By turning off the contact Tb and therefore deenergizing the auxiliary relay Xi, the a contact Xla is turned off (JFF), but the scraper motor 5 continues to operate by turning on the free-running switch a contact 9a. The operation of the extraction mechanism operating motor 6 is interrupted by turning off the self-propelled switch b contact 9b.

The scraping operation by the scraper motor 5 is completed and the risk is L.
/ - C4 When the motor returns to the standby position, the A contact 9a of the self-propelled switch 9 of the motor 5 turns OFF and the B contact 9b turns ON, the scraper motor 5 stops, and the extraction mechanism operation motor 6 starts operating again. After starting and completing the rest of the cleaning operation stroke (for example, raising the piston 1), the self-propelled switch 8 is turned OFF to stop and enter a standby state.

In this way, with conventional extraction mechanisms, the sales cycle (
In order to shorten the time from when one sale is completed to when it can be sold again) and to increase the vending operation rate of the vending machine, the scraping operation is started immediately when the position detection switch 7 detects the lowering of the filter block 3. It has become.

However, in this method, due to the structure of the piston 1, filter block 3, position detection switch 7, etc., when the piston 1 finishes the extraction operation stroke and the filter block 3 returns to the standby position, the filter block 3 returns before the piston 1. A position detection switch 7 detects completion of lowering of the filter block near the point when the piston 1 starts to rise.
But Kisuku L'-Ha4'! 'Try to make it work. At this time, the bean crumbs that have adhered to the piston 1 are delayed and fall down due to subsequent water shortage, and when the scraper 4 is pulled back, the beans that have fallen down the road are scraped out backwards (toward the scraper motor side). As a result, the beans scraped backward may clog the movable part of the filter block 3 and prevent it from rising, causing the extraction mechanism to lock, or the beans may solidify in the standby state of the scraper 4, resulting in scraping. This could lead to malfunctions such as clay bar locks.

[Purpose of the invention]

An object of the present invention is to provide an extraction mechanism that eliminates the above-mentioned drawbacks and is free from the risk of failure of the extraction mechanism lock, scraper lock, etc. due to bean grounds falling from the piston after being scraped forward by the scraper. shall be.

[Key points of the invention]

In contrast to the conventional method, in which the timing for the start of H is determined by operating the scraper only by detecting the standby position of the extraction mechanism, this invention
It is operated by the output of a timer with an adjustable delay time that is linked to the operation of the extraction mechanism, and the timer is adjusted to start the scraper at the timing when the beans or cloves firmly attached to the piston finish falling.

In other words, the gist of the present invention is a cylinder equipped with a piston that accommodates poured ground coffee beans, compresses the ground beans, and extracts the coffee;
After coffee extraction, a bottom block (filter block, etc.) is opened downward from the cylinder with the extracted beans on it, and the bottom block is opened from the cylinder to a predetermined position. A ground bean coffee vending machine comprising a separation ensuring means (for example, a mechanism such as a cam or a link that drives the bottom block), and a scraping means (such as a scraper) for scraping off the beans on the bottom block at the predetermined position. The extraction device is provided with variable adjustment means (such as a timer) for variably adjusting the time until the scraping means starts the scraping operation after the bottom block is separated to the predetermined position; Alternatively, the time in the variable adjustment means corresponds to the position of the piston by using a timer cam switch that opens and closes with a timer cam that is linked to a motor that drives the piston. Further, the opening ensuring means may include means (such as a position detection switch) for detecting that the bottom block has been opened to the predetermined position.

[Embodiments of the invention]

The present invention will be explained below based on FIGS. 1 and 2. 1st
The figures are diagrams showing the configuration of an embodiment of the present invention. Figure (a) is a configuration diagram of the entire main part including a longitudinal section similar to that in Figure 3 (b), and Figure (b) is the extraction mechanism operating motor 6. 2 is a diagram showing an example of the configuration of a timer cam C newly provided on the axis of FIG.

FIG. 2 is a diagram showing the operation sequence of FIG. 1, and corresponds to FIG. 4.

In FIG. 1(a), 1o is a timer switch which is opened and closed by the timer cam C, and its a contact 10a is connected in series with the a contact 7a of the position detection switch 7 as shown in FIG. The timer cam C is, for example, a cam plate c of the same shape consisting of concentric semicircular convex portions X and concave portions y, as shown in FIG.
l, c2y, are constructed by concentrically overlapping each other. The open/close position of the timer cam switch 1o is adjusted using the cam plates C1, C.
The two cam plates CI
, C2 can be adjusted by the size and position of the overlapping section θ of the concave portions.

Next, the operation of FIG. 1 will be explained based on FIG. 2.

Of the extraction operation stroke and the cleaning operation stroke, the filter block 3 precedes the piston 1 and returns to the standby position (therefore, the position where the a contact 7a of the position detection switch 7 is turned on) is the same as the conventional one. In the present invention, even if the a contact 7a is turned on, the scraper 4 does not start operating until the a contact 10a of the tie cam switch 10 is turned on. The cam switch a contact 10a is adjusted to be turned on when the piston 1 begins to rise and the bean particles that have adhered to the trap have definitely finished falling.

Auxiliary relay XI and timer T are energized by turning on contact 10a, and auxiliary relay X1. When the a contact Xla turns ON, the scraper motor 5 is started, and the scraper 4 starts scraping off the beans and beans, including the beans, that fell late from the piston 1.

After that, the a contact 9a of the free-running switch (scraper free-running switch) 9 of the scraper motor 5 is ON, and the b contact 9b is 0F.
F (therefore, the direct operation of the extraction mechanism operation motor 6 is interrupted), the B contact Tb is turned OFF' due to the delay operation of the timer T, and the scraper motor 5 is switched only to the free-running switch A contact 9a. Start running on your own. After this, the scraping operation is completed and the scraper 4 returns to the standby position, and the extraction mechanism operating motor 6 resumes the interrupted operation by the recovery of the self-propelled switch 9, and the piston 1 returns to the standby position and continues until it stops. The operation is similar to that shown in FIGS. 3 and 4.

In the above embodiment, the position detection switch 7 can be omitted and the scraper 4 can be moved using only the timer cam switch 10 to achieve the same operation, but the position detection switch a contact 7a and the timer cam switch a contact 10a When connected in series, there is an advantage that malfunction of the scraper 4 due to idling of the extraction mechanism operation motor 6 can be prevented and the reliability of the apparatus can be improved.

In addition, instead of the timer cam switch 10, for example, an electric timer is provided that measures a predetermined time after determining whether the position detection switch a contact 7a is ON and takes into account the time it takes for the bean crumbs attached to the piston 1 to fall. 5
You may also use a method of delaying startup. However, when the timer cam switch 10 is used, the ONj of its a contact 10a
The point in time when the piston 1 moves upward is determined by the position when the piston 1 moves upward, without being directly related to the speed of the extraction mechanism operating motor 6. This has the advantage of increasing the reliability of determining whether the fall is complete.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, the timing to start the scraper is determined by the adjustable timer output, so that after the scraper scrapes off the beans, the beans that have adhered to the piston fall. By doing so, it is possible to prevent the extraction mechanism from locking and the scraper from locking due to scraping of bean grounds backward when the scraper returns to the standby position.

[Brief explanation of the drawing]

Figure 1 is a diagram showing the configuration of an embodiment of the present invention, and Figure 2 is a diagram showing the configuration of an embodiment of the present invention.
FIG. 3 is a diagram showing the configuration of a conventional device, and FIG. 4 is a diagram showing the operation sequence of FIG. 3. 1...Piston, 2...Cylinder, 3
... Filter block, 4 ... Scraper, 5 ... Scraper motor, 6 ...
・Extraction mechanism operation motor, 7...Position detection switch, 10...Timer cam switch, (Q)
(b), t1 Figure 2

Claims (1)

[Scope of Claims] 1) A cylinder equipped with a piston that accommodates pouring ground coffee beans, compresses the ground beans, and extracts coffee, which is applied to the bottom of the cylinder, and after coffee extraction, a bottom block that opens downward from the cylinder with the extracted soybean cake placed thereon; a separation securing means that ensures that the bottom block is separated from the cylinder to a predetermined position; In a brewing device for a ground bean coffee vending machine comprising a scraping means for scraping off bean grounds on a bottom block, the scraping means performs the scraping operation after the bottom block is separated to the predetermined position. A brewing device for a ground bean coffee vending machine, characterized by being provided with a variable adjustment means for variably adjusting the time until starting. 2) A brewing device for a ground bean coffee vending machine according to claim 1, wherein the time in the variable adjustment means corresponds to the position of the piston. 3) The device according to claim 1 or 2, wherein the separation ensuring means includes means for detecting that the bottom block has separated to the predetermined position. Extraction device for bean coffee vending machine.