JPH049967Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to a safety valve device for an air pot.

[Conventional technology]

As safety measures for air pots, in addition to narrowly defined safety measures such as preventing hot water from flowing out when the pot falls over and making it impossible to suck hot water by directly touching the outlet, there are also safety measures in the air pump. Various safety measures have been taken in a broad sense, including sanitary measures such as preventing hot water from flowing in and accumulating.

[Problem that the invention aims to solve] Conventional safety measures were provided independently for each necessary part, but when trying to make a pot more compact, it is important that these measures are independent. This is one of the causes that hinder downsizing.

Therefore, the purpose of this invention is to make the pot more compact by consolidating safety measures for various types of hot water.

[Means for solving problems]

In order to solve the above problems, this invention provides a first chamber, a second chamber, and a third chamber independently in the safety valve case, and the first chamber is an air pump provided between the air pump and the inside of the container. The second chamber is interposed in the middle of the hot water supply passage provided between the water pumping pipe and the third chamber, the discharge passage is provided between the third chamber and the discharge port, and the second chamber is provided in the middle of the hot water supply passage between the water pumping pipe and the third chamber. hot water backflow prevention device,
The second room is equipped with a device to prevent hot water from flowing out in the event of a fall, and the third
In addition to providing an opening leading to an air hole in the chamber,
The hot water supply passage is open to the third room.

[Effect]

Hot water flowing back from the container toward the pump is blocked in the first chamber, and hot water flowing out from the pumping pipe to the discharge port when the pot falls is blocked in the second chamber. If you put your mouth on the discharge port and suck in the hot water, you will not be able to draw hot water because the hot water supply passage is open to the atmosphere in the third chamber.

〔Example〕

The air pot of the embodiment shown in the attached drawings has a bellows type air pump 1 attached to the upper front surface of the pot as a whole, as shown in FIGS. 1 and 2, and a discharge port 2 provided directly below it. By pushing the cap 3 placed over the air pump 1 downward, the inside of the container 4 is pressurized, and the discharge port 2 is pushed downward.
It is designed to discharge water into hot water.

The container 4 is made of a vacuum double bottle, and the tip 5 on the bottom is of a so-called side tip type, and consideration is given to reducing the height of the pot in this aspect as well.

The shoulder body 7, which is placed on the opening 15 of the container 4 via the packing 6, engages the upper edge of the body 8 at its lower end, and is fastened to the center part of the bottom body 9, which is screwed to the lower edge of the body 8. The raising body 10 is screwed together, the bottom surface of the container 4 is tightened by the tightening body 10, and the container 4, shoulder body 7, body 8, and bottom body 9 are integrated. Shoulder body 7 is body 8
The outer peripheral wall 11 and the lid body 12 are formed to have approximately the same diameter.
The upper surface portion 13 and the lid body 12 are formed on substantially the same plane as the
It consists of an inner circumferential wall 14 into which the container 4 is fitted, and a small-diameter cylindrical portion 16 that rests on the mouth 15 of the container 4.

As shown in FIG. 3, the shoulder body 7 has a recess 17 formed in its front surface with an open outer circumferential wall 11 and an open upper surface 13. This recess 17
are both side walls 18, inner wall 19, top wall 20 and bottom wall 2.
1, and the inner wall 19 is formed by the inner peripheral wall 1 of the shoulder body 7.
4 (see Fig. 2). Therefore, a portion of the lid body 12 is also recessed in accordance with the recessed shape of the inner wall 19. Furthermore, an air hole 23, a discharge hole 24, and an air vent hole 25 are formed in the inner wall 19. A pumping pipe 26 is connected to the inner end of the discharge hole 24 .

A circumferential wall 27 is formed at the outer circumferential edge of the upper wall 20 in an arc shape, which is continuous with the arc of the open end of the inner circumferential wall 14 of the shoulder body 7, and is adapted to receive the outer circumference of the upper end of the lid body 12.

The bottom wall 21 has insertion holes 29', 3 into which the three claw plates 29, 30, 31 of the bellows lower plate 28 are inserted.
0', 31' are formed, one of which is fixed part 3.
6 is provided, and the bellows lower plate 28 is fixed to its fixing part 36.
and fix it with screws 37 (see Figure 2). Support ribs 32, 33, 34 of the safety valve device 38 are formed on each of the insertion holes 29', 30', 31'. Further, a pair of opposing receiving claws 39 are formed at the front end of the bottom wall 21 and project forward from the body 8 to receive the bellows lower plate 28. A shoulder cover bottom plate 44 is attached to the lower surface of the bellows lower plate 28 with screws 51 (see FIG. 2). A discharge port 2 is provided in the bottom plate 44.

A safety valve device 38 is installed inside the recess 17 described above. The safety valve device 38 is shown in FIGS. 5 and 6.
As shown in the figure, it is provided within a safety valve case 60. The safety valve case 60 has a first chamber 6 therein.
1. The second chamber 62 and the third chamber 63 are provided independently, the second chamber 62 and the third chamber 63 are made adjacent to each other, and the lid 64 on the top surface of the case 60 is tightly fitted.

The first chamber 61 has a water-blocking tube 65 penetrating its bottom surface, and its upper end projects higher than the peripheral wall of the case 60. The lid 64 is provided with a bulge 66 that covers the top of the water-blocking tube 65. Furthermore, an air port 67 is provided in a protruding manner on the side surface of the first chamber 61 .

A hot water inlet 68 is provided protruding from the side surface of the second chamber 62 . Further, a weight plug 70 is disposed on the lid 64 corresponding to the second chamber 62 so as to face below the outlet 69 thereof (see FIG. 6). The weight stopper 70 is
It is adapted to move vertically by a guide 71, and closes the outlet 69 when the pot falls over.

As shown in FIG. 7, the lid 64 of the third chamber 63 is provided with a connecting tube 72 in a penetrating state, and its lower end is open to the inside of the third chamber 63. As shown in FIG. An outlet 73 is formed on the bottom surface of the third chamber 63 facing the lower end of the connecting tube 72 . In addition, the lid 64 has an air hole 74.
is formed. Further, the upper end of the connecting tube 72 and the outlet 69 of the second chamber 62 are connected to the connecting tube 7.
Connected by 5.

The configuration of the safety valve device 38 is as described above,
Place the case 60 on the aforementioned ribs 32, 33, and 34, and slide it to the air port 6 of the first chamber 61.
7 is connected to the air hole 23 of the shoulder body 7, and the inlet 68 of the second chamber 62 is connected to the discharge hole 24 of the shoulder body 7 (the fourth
(see figure). Further, the lower end of the water-shielding tube 65 of the first chamber 61 and the air hole 41 of the bellows lower plate 28 are connected by the air tube 40 . Further, the outlet 73 of the third chamber 63 and the outlet 2 of the bottom plate 44 are connected by the outlet tube 42 . Further, the air hole 74 of the third chamber 63 and the air vent hole 25 of the shoulder body 7 are connected by an air tube 76.

As can be seen from these connections, the first chamber 6
1 is interposed in the middle of an air passage including an air tube 40 from the air pump 1 to the inside of the container 4. Further, the second chamber 62 is interposed in the middle of a hot water supply passage provided between the water pumping pipe 26 and the third chamber 63. A discharge passage including a discharge tube 42 is provided between the third chamber 63 and the discharge port 2 .

Note that the first chamber 61 may be configured as shown in FIGS. 8 and 9. That is, the lid 6 of the first chamber 61
A connecting port 77 of the air tube 40 is provided protruding from 4,
A ball 78 is supported by a guide 79 in the first chamber 61 facing the connection port 77, so that when the pot falls over, the ball 78 will move into the connection port 77.
This prevents hot water from flowing back into the air pump 1.

The safety valve device 38 has the above-mentioned configuration, and is assembled into the shoulder body 7 together with the bellows lower plate 28 and the bottom plate 44, and then the shoulder cover 43 is attached to the front surface of these to cover the recess 17 of the shoulder body 7.

As shown in FIG. 3, the shoulder cover 43 is surrounded by an arcuate side 45 along the aforementioned peripheral wall 27 and a curved side 46 along both side walls 18, and covers the upper surface of the shoulder body 7 as a whole. It has a curved cover surface 47 that covers a range from 13 to along the outer peripheral wall 11, and a cylindrical guide tube 48 that projects forward is formed on the curved cover surface 47. Guide tube 48
A guide rib 50 is provided on the inner circumferential surface of.

The above-mentioned shoulder cover 43 is engaged with the main wall 27 at its arcuate side 45, and is engaged with the bottom plate 44 at the lower end of the guide tube 48.

The bellows air pump 1 is inserted into the guide tube 48 described above. The lower end of the air pump 1 is welded and fixed on the bellows lower plate 28, and the air pump 1
The push button 3 is in sliding contact with the guide rib 50.

The air pot of the embodiment has the above configuration, and as can be clearly seen in FIG. 2, the center line l of the air pump 1 is located somewhat forward of the body 8, and the amount of forward protrusion of the air pump 1 is as follows. When a downward pressing force is applied on this center line, the pot is set within a range in which the pot will not fall due to the center of gravity being shifted to one side. That is, the air pump 1 is not mounted so that its entirety protrudes forward from the body 8, but is partially inserted into the recess 17 provided in the shoulder body 7, and the amount of protrusion is reduced accordingly. ing.
In addition, in order to increase safety, the bottom body 9 may be provided with supporting legs 51 that protrude forward.

Although the discharge port 2 does not necessarily need to be located on the above-mentioned centerline 1, it is disposed near the centerline 1 in the front of the body 8, that is, directly below the air pump 1.

Now, when the push button 3 of the air pump 1 is pressed down, pressurized air is sent in the order of the air pump 1 → the air tube 40 → the first chamber 61 of the safety valve device 38 → the air hole 23 of the shoulder body 7 → the container 4,
The inside of the container 4 is pressurized (see route a in FIG. 4).
Furthermore, when the internal pressure of the container 4 increases, the hot water in the container 4 flows from the pumping pipe 26 to the discharge hole 24 to the safety valve device 3.
8 second chamber 62 → connection tube 75 → third chamber 63
The liquid is discharged in the order of →discharge tube 42 →discharge port 2 (see path b in FIG. 4).

Further, the airtightness test in the factory is performed by sucking the internal air from the discharge port 2 while the air vent hole 25 is closed with a suitable jig.

When too much water is put into the container 4 of the pot, water flowing back into the first chamber 61 from the air hole 23 is blocked by the water-shielding cylinder 65 formed at a sufficiently high height, and does not flow into the air pump 1.

In the case shown in FIGS. 8 and 9, a connection port 77 is provided in the lid 64, so that backflow can be prevented even with this structure.

Furthermore, if the pot falls over, the weight plug 70 of the second chamber 62 closes the outlet 69, thereby preventing hot water from flowing out. In the case of FIGS. 8 and 9, the ball 78 closes the connection port 77 and prevents hot water from flowing back into the air pump 1.

Furthermore, if you try to suck hot water by directly attaching your mouth to the discharge port 2, the hot water will be sucked out from the air hole 74 of the third chamber 63.
Since the air is sucked in, hot water is not sucked in.

[Effect of idea]

As described above, this invention has the effect of consolidating various safety measures regarding the hot water in the pot into a safety valve device, and therefore makes the pot more compact.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the embodiment, Fig. 2 is an enlarged sectional view of the same, Fig. 3 is a partially omitted exploded perspective view of the same, Fig. 4 is an air and hot water system diagram of the above, and Fig. 5 is a diagram of the same as the above. FIG. 6 and FIG. 7 are cross-sectional views of the assembled state of FIG. 5; FIG. 8 is an exploded perspective view of a modified example of the safety valve device; , FIG. 9 is a sectional view of the assembled state shown in FIG. 8. 1... Air pump, 2... Discharge port, 4... Container, 7... Shoulder body, 23... Air hole, 24... Discharge hole, 25... Air vent hole, 26... Lifting pipe,
38...Safety valve device, 40...Air tube,
41...Air hole, 42...Discharge tube, 60
...Safety valve case, 61...First chamber, 62...Second chamber, 63...Third chamber, 64...Lid, 65...Water shield cylinder, 66...Bulging part, 67...Air port, 68
...Inlet, 69... Outlet, 70... Weight plug,
71... Guide, 72... Connection tube, 73... Outlet, 74... Air hole, 75... Connection tube,
76...Air tube, 77...Connection port, 78
...Ball, 79...Guide.

Claims (1)

[Scope of utility model registration request] The first and second chambers are located independently inside the safety valve case.
A chamber and a third chamber are provided, the first chamber being interposed in the middle of the air passage provided between the air pump and the inside of the container, and the second chamber being interposed in the middle of the air passage provided between the water pump and the third chamber. A discharge passage is provided between the third chamber and the discharge port, a hot water backflow prevention device is provided in the first chamber, a hot water outflow prevention device is provided in the second chamber,
A safety valve device for an air pot in which an opening leading to an air hole is provided in a third chamber and a hot water supply passage is opened into the third chamber.