JPS6221181Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in the valve body and related members at the connection port of a cartridge-type tank.

Many cartridge-shaped liquid tanks are used, such as fuel tanks for kerosene heaters, and a valve mechanism is provided at the outlet at the bottom of the tank to prevent liquid leakage when the tank is removed.
However, many conventional valve mechanisms have complicated structures and are expensive to manufacture, and those with simple structures lack reliability and are prone to problems such as liquid leakage.

The present invention was developed with this point in mind, and a plate-shaped valve body supported at one end so as to be openable and closable is provided on the inner surface of the outlet at the bottom of the cartridge-type tank, and the valve body is pressed when the tank is installed. A push-up body that is raised to open the outflow port is provided on the catch seat, and an inclined end surface is formed at the upper end of the push-up body so that the support side of the valve body is lower. Although the structure is simple, there is no leakage. To provide a connection port for a cartridge type tank that is highly reliable and can withstand long-term use without applying excessive stress to the valve body when opening and closing the valve body.

Next, embodiments of the present invention will be described with reference to the accompanying drawings. Note that this example relates to a semi-automatic espresso machine for home coffee makers, and shows an example in which the present invention is implemented at the connection port of a water tank for supplying water for extraction. It goes without saying that the application of the invention is not limited to that of this embodiment.

First, the overall outline will be explained with reference to FIG. 1 showing the external appearance and FIG. 2 showing the outline of the internal structure. The body 1 has a U-shape with a concave portion on the front as a cup holder, and an upper arm 1a has a built-in heating device 2 and a holding portion 4 into which a filter holder 3 is inserted, and a lower arm 1b has a holding portion 4 into which a filter holder 3 is inserted. is drainage plate 5
is provided. In addition, a cartridge-type water tank 6 is removably attached to the back.
The water inside is sent to the heating device 2 by the pump 7 from the outlet 8 and the seat 9 through the hose 10, the pump 7, and the hose 11. The heated and boiled water passes through the valve part 12 and is injected from the connection port 13 together with steam onto the coffee powder 15 placed in the filter 14.
The coffee extracted under pressure is extracted in the mesh part 1.
6 and drips from the nozzle 17 to the drainage plate 5.
You get freshly brewed coffee in a cup placed on top. The above is an overview of this device, and the details will be explained below.

The heating device 2 is composed of a base 21 made of aluminum die-casting and a lid 22, and the edge of a fin 23 protruding from the lower surface of the lid 22 is a sheet packing sandwiched between the base 21 and the lid 22. A water channel 24 is formed by being pressed into contact with 25. This waterway 24 has a check valve 25 integrated with the seat packing 25.
The fins 23 are continuous from the water inlet 26 provided with a hole to the steam reservoir 27 at the center, and the shape of the fins 23 is appropriately selected to form a spiral shape or a shape that gradually approaches the center while being folded back as appropriate. A ceramic heater 28 is housed in the center of the upper surface of the lid 22, and is brought into close contact with the lid 22 by a fixing plate 29 and a pressing spring 30. The valve part 12 is a waterway 24
The valve body 33 is provided in the center of the base body 21 and protrudes into the steam reservoir 27 which is higher than the other parts of the body, and is pressed by a presser plate 31 with a large number of small holes and a pressure spring 32. have. Further, an annular packing 34 is buried around the connection port 13.

The filter holder 3 holds the filter 1 shown in FIG.
4 and a nozzle body 41 shown in FIG. Each member is made of molded material such as polycarbonate resin. Although the filter 14 is integrally formed with a mesh portion 16, the mesh portion 16 may be of a type in which a separate item is fitted. A flange 4 is attached to the upper edge of the filter 14.
2, and lug pieces 43 whose end surfaces are parallel to each other are provided at two corresponding locations on the outer periphery. This lug piece 43 functions to prevent rotation when inserted into the holding part 4. Further, on the lower surface of the flange 42, there is a tapered step portion 4 that gradually becomes higher as it goes clockwise.
Three 4's are formed. On the other hand, nozzle 17 in the center
The nozzle body 41 is provided with a lever 45 that protrudes laterally, and the upper surface of the flange 46 at the upper edge has three tapered steps that increase in height in the clockwise direction, corresponding to the tapered step portion 44. A portion 47 is formed, and a rib 48 is provided around the periphery of the flange 46. When inserting into the holding part 4 of the body 1, the filter 14 is first placed on the nozzle body 41. The dimensions of each part are selected so that the filter 14 can be accommodated exactly in the nozzle body 41, and the rib 48 fits between the tapered step 44 of the filter 14 and the protrusion 49 provided on the lower surface of the ear piece 43. Since both members are integrated, in this state, an appropriate amount of coffee powder is put into the filter 14 and inserted into the holding part 4. Holding part 4
Support ribs 4a are formed at the lower side of the
With the flange 46 placed on the support rib 4a, it is inserted until it stops at a position corresponding to the connection port 13. Next, turn the lever 45 to the right to remove the nozzle body 41.
By rotating clockwise when looking from below,
The filter 14 is pushed up vertically by the interaction of the tapered steps 44 and 47, and the annular rib 50 having a triangular cross section formed on the upper surface of the filter 14 is pressed against the packing 34, completing the installation. 51
is a stoppa.

When the power switch (not shown) is turned on, the water in the water channel 24 is heated by the ceramic heater 28, boiling in the center and increasing the pressure in the water channel 24, but the check valve 25a prevents backflow. be done. The valve body 33 of the valve portion 12 is set to open at a pressure of about 3 kg/cm ² , and when this pressure is reached, steam and hot water are added to the coffee powder 15 all at once. When the extraction lever 55 is pressed, the extraction switch 56 is turned on, and the pump 7 whose delivery pressure is set to 3.5 to 4 kg/cm ² is driven to supply new water from the water tank 6, and hot water is passed from the connection port 13 to the filter 14. The coffee liquid is extracted from the nozzle 17. 57 is a power indicator light, 58
is the appropriate temperature indicator light.

FIG. 5 is an enlarged cross-sectional view of the mesh portion 16 of the filter 14, and the upper diameter on the inflow side is small;
A tapered through hole 16 with a larger diameter on the lower side, which is the outflow side.
A large number of holes are provided. A mesh portion having such a shape can be easily obtained by precision molding, for example, by injection molding of polycarbonate resin, but since the mesh portion is formed into a tapered through hole 16a that widens in diameter toward the outflow side, clogging is prevented. It is hard to get clogged, and even if it does get clogged, it can be easily cleaned. Note that the tapered through hole 16a has a conical shape,
Any pyramid shape is acceptable, but in the case of resin molding, it is better to use a pyramid shape. This is due to mold manufacturing reasons; in the case of a conical shape, it is necessary to install a large number of conical pins, whereas in the case of a pyramidal shape, a V-shaped cut is inserted in two directions. Alternatively, if the molds are inserted in parallel from three directions, a male mold having a large number of pyramidal parts can be easily obtained.

FIG. 6 shows the structure of the connection port of the water tank 6, in which a valve body 61 is attached to the end of the outlet 8 that projects downward. The valve body 61 is made of an elastic material such as silicone rubber, and as shown in FIG. It has a shape connected to the gasket 64 and is fixed to the end of the outlet 8 by a stopper 65,
The outflow port 8 is blocked. 66 is O-ring, 67
is a mesh lid. On the other hand, a push-up body 68 is provided at the center of the seat 9 into which the outflow port 8 is inserted, and the push-up body 68 is configured to push up the valve body 61 to open the outflow port 8. The push-up body 68 is connected to the inner wall of the seat 9 by fins (not shown), and has an inclined end surface 69 at the upper end. This inclined end surface 69 lowers the support portion 61a side of the valve body 61, and its extension line is inclined in a direction that almost intersects with the support portion 61a, so that when the valve body 61 is pushed up, undue stress is applied to the valve body 61. They are not allowed to participate. Also, the push-up body 68
is pipe-shaped, and a through hole 70 is provided near the inclined end surface 69. Therefore, when the valve body 61 is pushed up and the outflow port 8 is opened, a path passing through the through hole 70 is created as shown by the arrow, so the flow resistance at the connection port is reduced, and the water from the water tank 6 is supply will be carried out more smoothly. In addition, in the figure, one through hole 70 is formed close to the highest part of the inclined end surface 69, but two or more can be provided, and the shape is also a long hole rather than a round hole so that the effective cross-sectional area It is also possible to increase

FIG. 7 shows the shape of the seat packing 25, in which a disc-shaped side edge made of an elastic material such as silicone wrapper is made to protrude, and an arcuate cut 25b is made in the same manner as the valve body 61 to form the check valve 25a. has been formed.
25c is an escape hole of the valve portion 12. This check valve 2
5a, as shown in FIG.
is blocked. Since the check valve 25a is pushed up by the inclined end face in this way, a return force is applied to the check valve 25a to return to the flat shape due to its own elasticity, and it comes into close contact with the water inlet 26, so the check valve 25a has a high check effect and a slight It also exhibits sufficient occlusion effect against pressure. In addition, since the seat gasket 25 and the check valve 25a are integrated, the number of parts is small and assembly is easy.

As described above, the present invention includes a plate-shaped valve body supported at one end so as to be openable and closable, and an inclined end surface is formed at the upper end of the push-up body that pushes up the valve body so that the support side of the valve body is lower. Therefore, when the valve body is pushed up and opened, the inclination of the valve body and the slope of the upper end of the pusher body can be matched, and the valve body is not pushed locally and the entire upper end of the pusher body is opened. No unreasonable stress will be applied due to being pushed. Therefore, the valve body will not be damaged even after long-term use, and reliability can be greatly improved despite the simple structure. In addition, if the push-up body is used as a pipe and a through hole is provided in it as in the example, the effective cross-sectional area at the connection port increases and the flow resistance can be lowered. Unlike the case where a liquid is distributed, even when the liquid is rapidly distributed by a pump, the liquid (water in the embodiment) can be smoothly supplied. In addition, when a through hole is provided in the push-up body in this way,
It is also possible to increase the outer diameter of the push-up body 68 to eliminate the gap between it and the stopper 65, so that only the passage passes through the through hole 70, and as in the case of the check valve 25a, the valve body 61 is Since the periphery does not protrude, the state of support by the upper end of the push-up body 68 is improved, and the valve body 6
1 can be further reduced.

[Brief explanation of drawings]

Figure 1 is a perspective view of a coffee maker implementing the present invention, Figure 2 is a sectional view of the same, Figures 3a and b are perspective views of the filter, and Figures 4a and b are of the nozzle body. A perspective view, FIG. 5 is an enlarged sectional view of the main part of the filter, FIGS. 6 a and b are a plan view of the valve body of the water tank connection port and an enlarged sectional view of the connection port, and FIG. 7 is a plan view of the seat packing. It is a diagram. 6 is a tank, 8 is an outlet, 9 is a seat, 61 is a valve body, 61a is a support portion, 68 is a push-up body, 69 is an inclined end face, and 70 is a through hole.

Claims (1)

[Claims for Utility Model Registration] (1) A plate-shaped valve body supported at one end so that it can be opened and closed is provided on the inner surface of the outlet on the bottom surface of the cartridge type tank, and when the tank is installed, the valve body is pushed up to open the outlet. 1. A connection port for a cartridge-type tank, characterized in that a push-up body for opening the valve body is provided on a seat, and an inclined end surface is formed at the upper end of the push-up body so that the supporting portion side of the valve body is lowered. (2) The connection port of a cartridge-type tank according to claim 1 of the utility model registration claim, in which the push-up body is formed of a pipe and a through hole is provided near the inclined end surface.