JPH04297983A - Extracting and filtering device for vendor - Google Patents

Abstract

PURPOSE:To hermetically close an extraction chamber to perform normal forcible filtering by momently closing a valve body in the transition period from the open state to the close state of the valve body to collide the valve body against a valve seat. CONSTITUTION:With respect to the form of the cam face required for opening and closing of a valve body 6 of a valve open/close cam 16, a projecting part 20 extended to the trailing side in the rotation direction is added to the conventional cam face. Therefore, the valve body 6 is pressed downward more than conventional by energization of a compressed spring when the projecting part 20 of the valve open/close cam 16 comes to the position of the valve body 6, and the valve body 6 quickly rises toward a recessed part behind the projecting part 20 by the energizing force of the compressed spring and strikes the peripheral part of an upper aperture with force when the projecting part 20 passes the position of the valve body 6. Consequently, raw materials are crushed by the impact force for closing of the valve body 6 though being caught, and the sufficient hermetical close state is obtained.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extraction filtration apparatus, particularly to an opening/closing device for a valve body provided at a raw material inlet.

0002

[Prior Art] This type of extraction filtration device was developed in 1986-3.
It is disclosed in Publication No. 1480 and the like. It is constructed as shown in FIGS. 3-8.

The extraction filtration device includes a brewer unit 1 whose lower surface is open as shown in FIG. 3, and a filter that is driven up and down between a position where the lower surface opening 2 of the brewer unit 1 is closed and a position where it is opened as shown in FIG. It is comprised of a receiver 3, a valve body 6 that opens and closes the upper opening 5 of the brewing chamber 4 of the brewer unit 1, an opening/closing device 7 that drives the filter receiver 3, and the like.

[0004] The extraction and filtration operation is carried out as follows. Initially, as shown in FIG. 4, the filter receiver 3 closes the bottom opening 2 of the brewer unit 1, and the valve body 6 is pushed down against the bias of the compression spring 8 to open the top opening 5 of the brewing chamber 4. do. In this state, as shown by arrow A, the raw material and hot water are introduced into the extraction chamber 4 through the upper opening 5, and in this state, as shown in FIG. Then, as shown in FIG.
In this state, air 10 is further blown from the supply port 9 to increase the internal pressure of the extraction chamber 4, and the mixed liquid 11 is held between the brewer unit 1 and the filter receiver 3. Forced filtration is performed using a paper filter 12. The hot water in which the extracted extract is dissolved passes through the paper filter 12 and is discharged into the cup via the pipe line 13, and the raw material slag 14 remains on the paper filter 12. Next, as shown in FIG. 7, the filter receiver 3 is lowered, and the paper filter 12 with the raw material slag 14 attached thereto is replaced with one to be used for the next sale.

The valve body 6 is driven by a valve opening/closing cam 16 attached to the output shaft 15 of the opening/closing device 7, and the filter receiver 3 is driven via a slide shaft 18 by a main cam 17 attached to the output shaft 15 of the opening/closing device 7. The valve body 6 and the filter receiver 3 move as shown in FIGS. 4 to 7 while the output shaft 15 rotates once.

FIG. 8 shows the shapes of a valve opening/closing cam 16 and a main cam 17 in a conventional opening/closing device 7. As shown in FIG. Figure 8
(a) shows the state of the standby position. The state shown in FIGS. 4 and 5 is when the output shaft 15 rotates 60 degrees in the direction of the arrow from the state shown in FIG. 8(a) and reaches the state shown in FIG. 8(b), and the valve The body 6 is pushed down by the valve opening/closing cam 16, and a sufficient gap G is formed between the valve body 6 and the upper opening 5. The state shown in FIG. 6 is when the valve body has rotated 35 degrees from the state (b) in FIG. 8 to reach the state (c) in FIG.
is pulled up by the biasing force of the compression spring 8, and the upper opening 5 is completely closed by the valve body 6.

[0007]

[Problem to be solved by the invention] In such a configuration,
Since the upper opening 5 is closed with the valve body 6 and pressure is applied to perform forced filtration as shown in FIG. 6, the filtration time and cooking time can be shortened, but when the valve body 6 is closed, As shown in FIG. 9, the raw material H may be caught between the circumference of the upper opening 5 and the valve body 6, and the extraction chamber 4 may become incompletely sealed.

In this case, pressurizing air leaks from the gap G and the internal pressure of the extraction chamber 4 does not rise sufficiently.
During forced filtration, as shown in Figure 7, the filter receiver 3
When the filter receptacle 3 is lowered, there is a shortage of products dispensed into the cup, and when the filter receptacle 3 is lowered, the remaining mixed liquid 11 spills around it, causing a problem of staining the interior of the vending machine.

[0009] An object of the present invention is to provide an extraction filtration device that can seal the extraction chamber 4 in a required state even if the raw material H is caught between the circumference of the upper opening 5 and the valve body 6. shall be.

0010

[Means for Solving the Problems] The extraction filtration device of the present invention introduces raw materials into the extraction chamber from the upper opening of the extraction chamber of a brewer unit, and after inputting the raw materials, presses the valve body against the valve seat from inside the extraction chamber. In a cup-type vending machine that closes the upper opening, pressurizes the extraction chamber, forcibly filters the mixed liquid of hot water and raw materials with a filter, and dispenses the extracted filtrate into a cup, the valve body is driven to open and close. The opening/closing device is characterized in that it is configured to instantaneously close the valve body and cause the valve body to collide with the valve seat during the transition period from the open state to the closed state.

[0011]

[Operation] According to this configuration, in the transition period from the open state to the closed state, the valve body is instantly closed and the valve body collides with the valve seat, so there is a gap between the circumference of the upper opening and the valve body. The caught raw materials are
The valve body is crushed by the impact force, and the valve body comes into contact with the periphery of the upper opening, thereby sealing the extraction chamber.

0012

Embodiments Hereinafter, embodiments of the present invention will be explained based on FIGS. 1 and 2. It should be noted that the same reference numerals are given to the parts having the same functions as in FIGS. 3 to 9 showing the conventional example.

In the extraction filtration device of the present invention shown in FIG. 1, the shape of the valve opening/closing cam 16 has been changed as follows. (a) to (c) of FIG. 1 correspond to each state of (a) to (c) of FIG. The shape of the convex portion 2 extends rearward in the rotational direction as shown by hatching on the conventional cam surface.
The shape has been changed to include a 0.

More specifically, the shape of the convex portion 20 is as follows:
The roller 22 of the valve body 6 is formed in such a shape that it is spaced apart from the tip of the convex portion 20 so that the roller 22 does not descend along the cam surface 21a behind it. Since the shape of the valve opening/closing cam 16 has been changed in this way, when the convex portion 20 of the valve opening/closing cam 16 reaches the position of the valve element 6, the valve element 6 resists the bias of the compression spring 8 and moves further downward than before. The convex part 2
0 passes the position of the valve body 6, the valve body 6 rapidly rises toward the concave portion 21b at the rear of the convex portion 20 by the biasing force of the compression spring 8, and the valve body 6 moves around the upper opening 5. Collision with force.

Therefore, even if the raw material H is trapped as shown in FIG. 9, the trapped raw material H is crushed by the impact force when the valve body 6 closes, and a sufficiently sealed state can be obtained. Therefore, forced filtration can be completed within a specified time, the amount of products dispensed into the cups can be made uniform, and the interior of the vending machine is not contaminated.

In the above embodiment, the shape of the valve opening/closing cam 16 is such that a convex portion 20 is added compared to the conventional shape, but this is different from the conventional shape shown by the imaginary line in FIG. The same effect can be obtained by forming the recess 23 so that the valve body 6 is suddenly closed.

[0017]

As described above, according to the present invention, the opening/closing device that drives the opening and closing of the valve body can be used to instantly close the valve body and press it against the valve seat during the transition period from the open state to the closed state. Since the valve body is configured to collide with each other, even if a raw material gets caught between the periphery of the upper opening of the extraction chamber and the valve body, the trapped raw material will be crushed by the impact force of the colliding valve body. This allows normal forced filtration to be carried out by sealing the extraction chamber.

[Brief explanation of drawings]

FIG. 1 is a plan view showing the rotational state of a main cam and a valve opening/closing cam in an opening/closing device of an extraction filtration device according to the present invention.

FIG. 2 is a plan view showing the rotational state of a main cam and a valve opening/closing cam in another embodiment.

FIG. 3 is a front view of the extraction filtration device.

FIG. 4 is a sectional view of the step of adding raw materials and hot water.

FIG. 5 is a cross-sectional view of the stirring process.

FIG. 6 is a cross-sectional view of a forced filtration process.

FIG. 7 is a cross-sectional view of the raw material dregs removal process.

FIG. 8 is a plan view showing the rotational state of a main cam and a valve opening/closing cam in a conventional opening/closing device.

FIG. 9 is a cross-sectional view of the extraction filtration device for explaining the problem to be solved.

[Explanation of symbols]

1 Brewer unit 3 Filter holder ４　　　　　　Extraction chamber 5 Upper opening of extraction chamber 4 6 Valve body 7　　　　　Switching device 8 Compression spring 12 Paper filter 16 Valve opening/closing cam 17 Main cam 20 Convex part 21 Recessed part

Claims (1)

[Claims] [Claim 1] Raw materials are introduced into the extraction chamber from the upper opening of the extraction chamber of the brewer unit, and after inputting, a valve body is pressed against the valve seat from inside the extraction chamber to close the upper opening and pressurize the extraction chamber. In a cup-type vending machine that forcibly filters a mixed liquid of hot water and raw materials through a filter and dispenses the extracted filtrate into a cup, the opening/closing device that drives the valve body to open and close is changed from an open state to a closed state. During the transition period, the extraction filtration device is configured to instantly close the valve body and cause the valve body to collide with the valve seat.