JPH034180Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Purpose of the invention] (Field of industrial application) This invention heats water stored in a water tank in a heating section, and pours this heated water into a section for extracting raw materials such as coffee powder. This is related to check valves installed in the water supply channels of beverage manufacturing machines that produce beverages, and in particular, check valves for beverage manufacturing machines that have a function to prevent deformation of the valve body and a function to guide movement of the valve body toward the valve seat in order to improve watertightness. Regarding check valves.

(Prior Art) In a beverage manufacturing machine in which water drawn from a water tank via a water supply channel is turned into hot water by a heating section, and this hot water is poured into a raw material extraction section via a hot water supply channel, the hot water flows into the water tank. A check valve is installed in the water supply channel to prevent backflow.

As a conventional check valve, a check valve for a water heater used for brewing coffee, etc. is known as disclosed in Japanese Utility Model Publication No. 51-42633.

This check valve is connected to the water tank 1 as shown in Figure 5.
A water supply pipe 3 has one end communicating with the valve box 2 and the other end communicating with a heating section (not shown).
A valve body 4 for regulating water flow from the water tank 1 to the water supply pipe 3 is provided in the valve box 2, and the valve body 4 is supported by maintaining the distance between the valve body 4 and the valve hole 5 at an appropriate size. A positioning piece 7 is formed on the valve support 6, a hole 8 is formed in the upper surface of the valve support 6, and the valve body 4 is provided vertically in the hole 8. A locking portion 9 is provided, and water sent from the water tank 1 to the water supply channel 3 side enters the valve box 2, pushes the valve body 4 downward, and flows out to the water supply pipe 3. Next, when the heated portion boils, water flows back toward the water tank 1 due to the pressure difference, and the valve body 4 closes the valve hole 5 to prevent back flow.

(Problem to be solved by the invention) In the conventional check valve as described above, the upper surface of the valve body 4, that is, the side of the valve hole 5 must be flat or the watertight effect cannot be achieved. Due to the rise in the temperature of the hot water, it expands and deforms, making it difficult to maintain a flat surface, resulting in poor watertightness.

In addition, in this check valve, the valve body 4 moves up and down guided by the locking part 9 on the lower side of the valve body 4.
is difficult to slide horizontally. This also has the problem of poor watertightness due to the cantilevered shape of the valve body guide.

This idea was developed in view of the above-mentioned problems, and is used to manufacture beverages by turning water drawn from a water tank through a water supply channel into hot water using a heating section, and then pouring this hot water into a raw material extraction section via a hot water supply channel. The purpose of this check valve is to increase the strength of the valve body to prevent deformation due to thermal expansion in check valves installed in the water supply channels of machines, and to increase the movement guidance of the valve body to enable stable sliding. .

[Structure of the device] (Means for solving the problem) This device has a water supply channel 12 connected to a water tank 11.
A valve body 20 made of a plate-shaped synthetic resin has first and second guides 21 and 22 formed on both sides of the valve body 17, which slide through the inflow and outflow water supply channels 12 of the valve body 17. The check valve 16 is formed by providing a reinforcing rib 29 near the edge of the valve body 20.

(Function) With the above structure, the reinforcing ribs 29 formed near the edges of the valve body 20 increase the strength and prevent deformation due to thermal expansion changes due to the temperature of the hot water c, and the movement state of the valve body 20 is By moving the first and second guides 21 and 22 formed on both sides of the valve body 20 within the water supply channel 12, the valve body 20 can be slid stably.

(Embodiment) FIGS. 1 to 3 show a first embodiment of this invention. As shown in FIG. The hot water heated by the heating section 13 is poured into the raw material extraction section 15 via the hot water supply path 14 to produce a beverage. In the middle of the water supply channel 12, there is a heating section 13 from the water tank 11.
A check valve 16 having unidirectionality is provided.

As shown in FIGS. 1 and 2, the valve box 17 of the check valve 16 is screwed with a pair of cylindrical first and second valve holders 18 and 19 made of metal, and It is formed larger than the cross-sectional area of the road. Reference numeral 20 denotes a disc-shaped valve body made of heat-resistant and light-specific gravity resin such as nylon, and is housed in the valve box 17. The valve body 2 is located in the center of the side surface of the first valve holder 18.
A first sliding piece 2 serving as a first guide formed on one side of the
A first insertion hole 23 is formed to form a valve seat 25. A step 26 is formed around the hole 23 of the valve seat 25, and a watertight first O-ring 27 is attached to the step 26.

Further, the first and second valve holders 18 and 19 are fixed to each other through another second O-ring 28 by screwing or the like. On the other hand, the second valve holder 1
9, a second insertion hole 2 for a second sliding piece 22, which is a second guide, formed on the other side of the valve body 20.
form 4. In other words, the valve body 20 is disc-shaped, and the first and second sliding pieces 21 and 2 are provided on both sides of the valve body 20.
2 is formed, and these first and second sliding pieces 21, 22
is inserted before and after the water supply channel 12 communicating with the valve box 17,
The valve body 20 is movable. Further, a reinforcing rib 29 in the form of a rising wall is provided around the edge of the valve body 20, and the root of the second sliding piece 22 is formed to have a large diameter to form a one-way flow inhibiting portion 30. On the circumferential surfaces of the first and second sliding pieces 21 and 22, groove-shaped first and second communication passages 31 and 32 are formed in the axial direction. The one-way flow inhibiting part 30 is designed to hit the side surface of the second insertion hole 24 of the valve box 17 when water is supplied to the heating part 13, thereby creating a gap for flowing water. At this time, the water passes through the first communicating path 31, the inside of the valve box 17, and the second communicating path 32.

In FIG. 3, reference numeral 33 denotes a base, which includes a flat rectangular container-shaped base 34, a rectangular machine frame 35 provided at one rear side of the upper surface of the base 34, and having upper and lower openings. The other rear side is provided with the water tank 11. Reference numeral 36 denotes a cup placing portion provided on one side of the front portion of the upper surface of the base 34;
The raw material extraction section 15 is disposed above.

The heating section 13 has a boiler tank structure, and includes a boiler tank body 37 and a coil-shaped sheathed heater 3 suspended within the boiler tank body 37.
Consists of 8.

39 is an extraction valve provided on the upper surface of the boiler tank body 37, a first hot water supply pipe 40 is vertically installed at the inlet of this extraction valve 39, and the tip of the outlet is connected to the raw material extraction part 1.
A second hot water supply pipe 41 communicating with the hot water supply pipe 5 is extended to form the hot water supply path 14. Further, a power switch 43 is disposed on the extraction valve 39 and operates in conjunction with the extraction valve 39 through an operating metal fitting 42.

In the raw material extraction section 15, a cup-shaped filter 44 for storing raw material powder is connected to a raw material storage container 4 with a grip handle 45.
6, and a flow hole 47 is formed in the center of the bottom thereof. Further, a safety valve 48 and a limiter 49 made of bimetal or the like are arranged on the upper surface of the boiler tank main body 37.

First, a predetermined amount of water a is supplied into the water tank 11 using a jug or the like, and the raw material storage container 46 is pulled out using the grip handle 45, and then the cup-shaped filter 4 fitted into the raw material storage container 46 is removed.
After storing the raw material powder b in the raw material storage container 46
Attach.

Next, when a water supply push button (not shown) is pressed, the internal pressure of the boiler tank body 37 is reduced, and at the same time, the exhaust pressure in the boiler tank body 37 is exhausted via a pressure reduction pipe (not shown), and the water a in the water tank 11 is
flows into the boiler tank main body 37 through the water supply channel 12.

Next, when the extraction push button 39a is pressed, the extraction valve 39 opens and the boiler tank main body 37, the hot water supply path 14 consisting of the first hot water supply pipe 40, the second hot water supply pipe 41, and the filter 44 are brought into communication state. , the power switch 43 is closed and the sheathed heater 38 is energized. As a result, the water that was previously maintained at a constant temperature is gradually heated to boil hot water c, and due to the pressure balance due to the increase in internal pressure, the hot water c in the boiler tank main body 37 passes through the hot water supply path 14 and feeds the coffee powder b. The extracted liquid d is supplied into the cup-shaped filter 44 and stored in the cup e from the flow hole 47 of the raw material storage container 46.

At this time, when water is supplied from the water tank 11 to the heating part 13, the valve body 20 is pressed and moved into the second insertion hole 24 of the valve box 17 by the water pressure caused by the drop of the water tank 11, and the one-way flow prevention member 30 Stop,
The heating section 13 passes through the first and second communication paths 31 and 32.
sent to. Next, when the heating section 13 is heated, the water a flows back toward the water tank 11 due to an increase in internal pressure. At this time, the valve body 20 is the first sliding piece 21, and the first sliding piece 21 is the first sliding piece 21.
The second sliding piece 22 is inserted into the insertion hole 23, and the second sliding piece 22 is inserted into the second insertion hole 24.
is moved to guide the valve body 20. Then, it contacts the first O-ring 27 attached to the first valve holder 18 to prevent backflow.

As described above, in the embodiment, the plate-shaped valve body 20
By providing the reinforcing ribs 29 on the valve body 20, even when the hot water c hits the valve body 20, it is possible to suppress flatness change due to thermal expansion of the valve body 20 and prevent deterioration of the degree of adhesion to the valve seat 25 side. The weight of the valve body 20 can be reduced, and when pressure is applied to the reinforcing rib 29 when the valve is closed, since the reinforcing rib 29 has an annular shape, the pressure is evenly applied to ensure the valve is closed.

Furthermore, groove-shaped first and second communication paths 31,
32 and the valve body 20 forming the restraining part 30 are provided with the first and second sliding pieces 21 and 22 to have a double-sided shape, so that stable valve operation is achieved even when the pressure difference on both sides of the valve body 20 is small. It can be performed.

Figure 4 shows a second embodiment of this invention.
A rising wall-shaped auxiliary rib 52 on the periphery of the circular valve body 51
, and first and second sliding pieces 53 and 54 are formed on both sides of the valve body 51, and a second sliding piece 5 is formed on both sides of the valve body 51.
A one-way flow prevention member 5 is formed by forming a large diameter root portion of 4.
5 will be provided. A hole 56 is formed on the end face of this first sliding piece 53.
A hole 57 is provided on the circumferential surface of the root portion, and the holes 56, 57
A first communicating path 58 is provided between them. On the other hand, the second sliding part 5
A hole 59 is provided in the end surface of the water flow prevention member 4, and a hole 60 is provided in the one-way water flow prevention member 55, and a second communication path 6 is provided between the holes 59 and 60.
1, and the water a flows through the first and second communication passages 58,
61. Therefore, the first and second
The sliding pieces 53 and 54 are in contact with each other around the entire circumference, allowing for more reliable operation.

The first and second insertion holes 23 and 24 are preferably treated with fluororesin so that the resistance is as low as possible, and the first O-ring 27 can also be made into close contact with the valve body 20 by selecting the hardness. It is desirable to increase the degree of

[Effects of the invention] According to this invention, by providing reinforcing ribs on the plate-shaped synthetic resin valve body, even if hot water generated in the heating section hits the valve body, flattening due to thermal expansion will occur. The original plane can always be maintained.
Pressure is always applied uniformly and adhesion can be improved. In addition, by providing reinforcing ribs near the edges, the valve body is lighter than the case where the valve body is reinforced by increasing its thickness, and backflow can be prevented even when the pressure difference between the valve bodies is small.

In addition, by providing guides on both sides of the plate-shaped valve body that slide the valve box through the inflow and outflow water supply channels, the valve body becomes a double-sided shape when sliding, and when the pressure difference on both sides of the valve body is small, That is, stable sliding can be obtained even in the initial stage of heating.

[Brief explanation of the drawing]

Figures 1 to 4 show examples of this invention.
Fig. 1 is a sectional view of the first embodiment, Fig. 2 is an exploded perspective view of the same, Fig. 3 is an overall sectional view of the same, Fig. 4 is a perspective view of main parts of the second embodiment, and Fig. 5 is a conventional FIG. 11... Water tank, 12... Water supply channel, 13...
Heating section, 14... hot water supply path, 15... raw material extraction section,
16... Check valve, 17... Valve box, 20... Valve body, 21... First sliding piece (first guide), 22...
...Second sliding piece (second guide), 29...Reinforcement rib,
a...Water, c...Hot water.

Claims (1)

[Scope of utility model registration request] A unidirectional system in which water led from the water tank through the water supply channel is turned into hot water by the heating section, the hot water is poured into the raw material extraction section through the hot water supply channel, and the water flows from the water tank to the heating section through the water supply channel. In a beverage manufacturing machine provided with a check valve, the check valve has first and second first and second check valves that slide in the inflow and outflow side water supply channels of the valve box within a valve box formed by increasing the area of the water supply channel. 1. A check valve for a beverage manufacturing machine, characterized in that a plate-shaped valve body made of synthetic resin is provided with guides formed on both sides, and reinforcing ribs are provided near the edges of the valve body.