JPS62233118A - Lid body of electric pot - 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 Field of the Invention The present invention relates to a lid for an electric water heater equipped with an air set for heating and keeping a stored liquid warm.

Background of the Invention In recent years, there has been a rapid increase in demand for boiling-type electric water heaters that keep water warm after it has been boiled, and the structure of the lid body allows the steam generated during boiling to be released to the outside without passing through the bellows. In this case, since the opening/closing mechanism of the steam passage becomes complicated, there is a strong desire to simplify the mechanism for preventing the lifting and lowering movement of the pushing body that presses the bellows.

Conventionally, the lid of an electric water heater that does not boil water has a bottom plate with a built-in bellows, as shown in, for example, Japanese Utility Model Application Publication No. 60-27829. A cylindrical body is provided upright, and a second cylindrical body is provided vertically on the lower surface of the pushing body that presses the bellows.
A vertical guide groove is provided on either one of the cylindrical bodies, and a vertical rib that engages with the guide groove is provided on the other side, and when the vertical rib and the guide groove match, the pusher can move up and down,
When the position shifts, the pushing body is prevented from descending.

Problems to be Solved by the Invention In a boiling type electric water heater, when the steam generated in the container is discharged to the outside through the steam passage without passing through the bellows, the steam is released in conjunction with the pressing operation of the pushing body. It is necessary to switch the passages, but with the conventional structure as described above, cylinder bodies are provided in the center of the pusher body and the bottom plate so as to face the inside of the bellows, so there is no mechanism for switching the steam passages. The problem is that it is extremely difficult to provide a system, resulting in a complicated configuration.

An object of the present invention is to provide a lid for an electric water heater that solves these problems.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention includes a lid body with a built-in bellows, and a plurality of substantially inverted bellows which are provided to hang down from the top of the lid body and are arranged downwardly inside the lid body. an inner cylindrical part provided with a letter-shaped groove and further provided with a plurality of inclined pieces each having an inclined part at its lower end; A corresponding outer flange is provided, and a plurality of engaging claws are provided at the lower end of the bellows. and a plurality of four parts that engage with each other, and when the pushing body rotates, the lifting and lowering movement of the pushing body is selectively blocked depending on the engagement state between the outer flange of the pushing body and the groove of the inner cylindrical part. , and when the pushing body returns due to the lifting and lowering movement of the pushing body when this blocking is released,
The inclined piece of the inner cylindrical portion acts on the outer flange of the pushing body.

Effect: According to the above configuration, the mechanism for selectively blocking the raising and lowering movement of the pushing body and the mechanism for raising and lowering the pushing body can be constructed only from the inner cylinder part at the top of the lid body, the upper surface of the bellows, and the pushing body. Therefore, the configuration is very simple, and when the pushing body returns, the inclined piece of the inner cylinder acts on the outer flange of the pushing body, reducing the dimensional gap between the parts of the rotation regulating mechanism and the dimensions at the time of assembly. Since variations are corrected, reliable and reliable operation is possible.

Furthermore, since there is no structure inside the bellows, even when applied to boiling type electric water heaters, the opening/closing mechanism of the steam passage for releasing steam is not subject to any shape restrictions, and the inside of the bellows is It becomes possible to freely set up the

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings. faE1 to FIG. 6, 1 is a cylindrical container with a bottom, and a heater 2 is attached to the bottom of the container 1 to boil the liquid stored inside and then keep it at a constant temperature.
The container 1 is housed within the main body 3 with a certain space therebetween. Reference numeral 4 denotes a lid body pivotally supported on the upper end opening of the container 2 so as to be freely openable and closable. A blocking mechanism (to be described later) that selectively prevents the pushing body 6 from moving up and down when the pushing body 6 moves up and down, and a rotation regulating mechanism (to be described later) that regulates the rotational movement of the pushing body 6 itself when the pushing body 6 moves up and down. , a steam passage 8 having an inflow lower communicating with the container 1 at one end and facing the outside of the lid body 4 at the other end; It has a built-in opening/closing mechanism (described later) for opening and closing 8.

The pusher body 6 is rotatably and freely movable up and down in an inner cylinder part 9 provided to hang from the upper part of the lid body 4, and protrudes outward from the lower part of the circumferential side wall 1o. A plurality of outer flanges 11 are provided, a plurality of engagement claws 12 are provided at the lower end, and a plurality of lips 13 are provided in the vertical direction on the inner surface of the circumferential wall 1o. Further, a plurality of protruding pawls 14 are provided at the lower end of the inner cylindrical portion 9 of the lid body 4, and a plurality of fitting pawls 15 are provided on the outer peripheral portion of the inner cylindrical portion 9 so as to protrude outward. 16 is a stopper, this stopper 16 is provided with a plurality of inner flanges 7 at the lower part of the cylindrical wall, and a plurality of inclined pieces 19 having an inclined part 18 at the lower end of the inner brim 17,
Furthermore, a plurality of fitting holes 20 are provided in the cylindrical wall, and by fitting the fitting claws 15 of the lid 4 into the fitting holes 20, the stopper 16 is attached and fixed to the lid 4. Ru. Further, a plurality of substantially inverted grooves 21 are formed by the inner cylindrical portion 9 of the lid 4, the protruding pawls 14 provided on the inner cylindrical portion 9, and the inner flange 17 of the stopper 16.

This groove 21 and the outer flange 11 of the pushing body 6 constitute a blocking mechanism.

The open lower end portion of the bellows 6 is covered with a lid cover 22 that covers the lower surface of the lid body 4, and the open upper end portion is covered with a top plate 23, and these are each welded in an airtight state by ultrasonic welding or the like. . The upper plate 23 is always urged upward by a first coil spring 24, and its central portion protrudes so as to face inside the pushing body 6, and furthermore, a hole 25 is formed in this central portion.
A check valve 27 with a seal packing 26 attached thereto is installed in the bracket hole 26 so as to be able to rise and fall freely, and the upper surface of the check valve 27 is in contact with the pusher e, and the second coil spring 28 and the first is urged upward by a coil spring 24. Further, a relief part 31 having an abutting part 3o corresponding to the rotational range of the rib 13 of the pusher 6 is formed in the central protruding part 29 of the upper plate 23, and is provided below the hole 25 in the central part. forms an inner cylinder 33 which is notched at a plurality of places and has an inner circumferential wall 32 inwardly at the lower end. Further, a plurality of recesses 36 are formed in the bottom surface 34, and the recesses 36 and the engaging pawl 12 of the pushing body 6 constitute a rotation regulating mechanism.

The mechanism for preventing the lifting and lowering of the pushing body 6 is released, and the pushing body 6
Only when the push body 6 moves up and down, the engaging claw 12 of the push body 6 engages with the recess 36 to restrict rotation of the push body 6. The upper plate 23 is positionally regulated and is fixed to the lid cover 22 via the bellows 5 by welding or the like.

The steam passage 8 includes a first steam passage 37 whose one end faces the steam port 36 of the lid 4 and a second steam passage 38 whose one end communicates with the inside of the container 1, each of which is attached to the lid cover 22 by a gasket 39.
．． The first steam passage 37 is sandwiched between the lid body 4 and the lid cover 22, and the second steam passage 38 is sandwiched between the lid body 4 and the lid cover 22.
It is inserted into 2 and secured with screws. Also the first
A ball 41 is built in the steam passage 37, and a seal hole 42 is formed which is opened and closed by the ball 41.
In addition, the inflow lower at the lowest end of the second steam passage 38 has a first
A lid gasket 43 is attached thereto, and a through hole 44 and an air port (not shown) are formed above the inflow lower.

The opening/closing mechanism for opening and closing the steam passage 8 includes a valve body 46 equipped with a second lid gasket 46 and an elevator shaft 47. The cover 22 is inserted from below, and the two are connected by a connecting claw 48 so that they can be raised and lowered, and are urged downward by the second coil spring 28. Further, the valve body 46 has a cylindrical portion below the center,
Moreover, first and second seal portions 49 are provided at the lower end of this cylinder.
50 is formed.

The operation of the above configuration will be explained next.

When injecting liquid, the pusher 6 is rotated until the lip 13 hits the abutment part 3o of the relief part 31 of the upper plate 23.

At this time, the outer flange 11 of the pushing body 6 comes off from the inner flange 17 of the stopper 16, and the elevating movement becomes possible. When the pushing body 6 is pressed in this state, the second coil spring 28 is set to have a weaker load than the first coil spring 24, so the check valve 27 is lowered and the seal packing 26 is pushed against the upper plate 23. hole 2
At the same time, the engaging claw 12 of the pushing body 6 engages with the recess 36 of the upper plate 23 to restrict rotation of the pushing body 6. When the pusher 6 is further pressed, the upper plate 23
is pushed down, and the lifting shaft 47 and the valve body 46, which are urged downward by the second coil spring 28, begin to descend, and the tip seal portions 49 and 50 of the valve body 46 and the first lid gasket 43 are closed. , and the sealing surface 51 of the second steam passage 38 and the second
The lid gasket 45 of the steam passage 8 is sealed almost simultaneously.
Close. By further pressing the pusher 6, the air in the bellows 6 passes through the pressure feed port 62 of the lid cover 22, is forced into the container 1 from the air port (not shown) of the second steam passage 38, and is forced into the container 1. 1 is made to flow out from the discharge port 54 through the water conduit 53 to the outside.

Next, when the pressing operation of the pushing body 6 is stopped and the pushing body 6 is raised, the upper plate 23 is raised by the reaction force of the first coil spring 24, and the bellows 5 is also extended. Next, the inner wall 32 of the inner cylinder 33 of the upper plate 23
The valve body 46 that had been in contact with the steam passageway 8 and was in contact with the steam passageway 8 rises to open the steam passageway 8, and as the pusher body 6 further rises, the upper surface of the second lid gasket 45 comes into contact with the lid cover 22. At the same time as the pressure feeding port 52 is closed, the lifting of the valve body 46, the lifting shaft 47, and the upper plate 23 is stopped. Further push body 6
When the pressure rises, the airtight seal between the seal gasket 26 of the check valve 27 and the hole 26 of the upper plate 23 is released, and the pusher 6 returns to its original position.

During this operation, the outer flange 11 of the pusher 6 separates from the stopper 16, but during this time the engaging claw 12 of the pusher 6 engages with the recess 35 of the upper plate 23, restricting the rotation of the pusher 6. Therefore, even if the pressing operation of the pushing body 6 is stopped, the pushing body 6 will rise due to the reaction force of the spring, and the inclined surface 18 of the inclined piece 19 of the stop collar 16 will move out of the pushing body 6. Tsuba 11
By acting on (a), the i-knee 15 reliably returns to its original position without the inner flange 17, allowing reliable and reliable operation.

On the other hand, when not injecting liquid, by rotating the pushing body 6 in the opposite direction, the outer flange 11 of the pushing body 6 is moved to the stopper 16.
Since the pusher body 6 is located on the inner flange 17 of the bellows 6, the downward movement of the pusher body 6 is prevented.As a result, the bellows 5 will not be compressed, and no liquid will be injected.

In the above embodiment, the groove 21 for raising and lowering the pushing body 6 was formed by the inner cylinder part 9 of the lid body 4 and the stopper 16 due to the complexity of the molding die. The same effect can be obtained even if the cylinder part 9 is formed only. In the above embodiment, the rotation of the pushing body 6 when pressed is restricted by the lip 13 of the pushing body 6 and the relief of the upper plate 23. Although the explanation has been made on both the abutment part 30 of the part 31 and the engaging claw 12 of the pusher 6 and the recess 36 of the upper plate 23, the engagement claw 12 of the pusher 6 and the recess 36 of the upper plate 23 The same effect can be obtained even if the rotation of the pusher body 6 is restricted during the lifting and lowering operation using only the pusher 6.

In this case, by providing a plurality of inclined pieces 58 on the other side of the portion of the stopper 16 where the inner flange 17 is not provided, the operation of the pushing body 6 when returning to the lifting and lowering operation becomes more reliable.

Further, as shown in FIG. 7, a stepped portion 57 is provided in the bottom surface 66 of the relief portion 31 of the upper plate 23, so that the check valve 27 comes into contact with the hole 25 of the upper plate 23 when the pushing body 6 is depressed. The same effect can be obtained even if the rotation of the pushing body 6 is restricted so that the lower end of the rib 13 of the pushing body 6 engages with the stepped portion 67 when the pushing body 6 is in contact with the other to maintain an airtight state. It is.

Effects of the Invention As is clear from the above-mentioned embodiments, the present invention includes a lid body with a built-in bellows, and a plurality of approximately inverted-shaped shapes that are provided to hang down from the top of the lid body and are arranged downwardly on the inner side. an inner cylindrical part provided with a groove and a plurality of inclined pieces each having an inclined part at the lower end; and an inner cylindrical part installed in the inner cylindrical part so as to be movable up and down, and corresponding to the plurality of grooves of the inner cylindrical part on the lower side of the peripheral wall. An outer flange is provided, and a plurality of engaging claws are provided at the lower end, and a pushing body that presses the bellows is provided on the upper surface of the bellows and engages with the engaging claws only when the pushing body moves up and down. a plurality of recesses that selectively prevent the pushing body from moving up and down depending on the engagement state between the outer flange of the pushing body and the groove of the inner cylindrical part by the rotational movement of the pushing body; When this blocking is released and the pushing body is returned to its original state due to the lifting and lowering movement of the pushing body, the inclined piece of the inner cylindrical portion is configured to act on the outer flange of the pushing body. The selective blocking mechanism and the mechanism for raising and lowering the pushing body can be composed of only the inner cylindrical part of the upper part of the lid body, the upper surface of the bellows, and the pushing body, and therefore the structure is very simple. Furthermore, when the pusher returns, the inclined piece of the inner cylinder acts on the outer flange of the pusher to correct dimensional gaps between the parts of the rotation regulating mechanism and dimensional variations during assembly. Highly reliable and reliable operation is possible.

Furthermore, since there is no structure inside the bellows, even when applied to boiling type electric water heaters, the opening/closing mechanism of the steam passage for releasing steam is not subject to any shape restrictions; It is possible to set it up freely.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of the lid of an electric water heater showing an embodiment of the present invention, and FIG. 2 is a sectional view of the main parts of the lid of the water heater.
Figure 3 is a cutaway side view showing the overall configuration of the water heater;
The figure is a cross-sectional view of the main part showing the state when the prevention of the raising and lowering movement of the pushing body of the same water heater is released, and Figure 5 is the main part showing the state immediately before the return of the pushing body is completed during the raising and lowering movement of the lid of the same water heater. FIG. 6 is a perspective view of the pushing body of the water heater seen from below, and FIG. 7 is a perspective view of the upper plate showing another embodiment. 4... Lid body, 6... Bellows, 6...
... Push body, 9 ... Inner cylinder part, 11 ...
...Outer flange, 12...Engagement claw, 13...
Rib, 16... Stopper, 17...
Inner tsuba, 18... Inclined portion, 19... Inclined piece, 21... Approximately inverted groove, 35...
Concave〇 Name of agent Patent attorney Toshio Nakao and 1 other person
Figure 2 Figure 3 q-1 Inner part L-1 Tatoyuyu/l-, 6 9th claw Noro-stopper 8--A section A 1 part No q--Eas @ less ? :L--Road inverted U-shaped groove 35-Concavity Fig. 4

Claims (1)

[Claims] A lid body with a built-in bellows, a plurality of approximately inverted L-shaped grooves hanging down from the top of the lid body, and a plurality of approximately inverted L-shaped grooves provided at the lower part of the inside, and a plurality of inclined pieces having a sloped portion at the lower end. an inner cylindrical part provided therein, an outer flange that is movably raised and lowered within the inner cylindrical part and that corresponds to the plurality of grooves of the inner cylindrical part below the peripheral wall, and further provided with a plurality of engagement claws at the lower end; The pusher includes a pushing body that presses the bellows, and a plurality of recesses that are provided in an upper plate constituting an upper surface of the bellows and that engage with the engaging claws only when the pushing body moves up and down, and the pushing body Due to the rotational movement of the pusher body, the engagement state between the outer flange of the pusher member and the groove of the inner cylinder portion selectively blocks the vertical movement of the pusher member, and when the blocking is released, the pusher member A lid body for an electric water heater, wherein an inclined piece of the inner cylindrical portion acts on an outer flange of the pusher body when the pusher body is returned to its original position due to a lifting motion.