JPS6041858Y2 - Filter mounting device for pressure cooker - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a filter attachment device for a pressure cooker.

A pressure cooker is equipped with a pressure regulating valve, a safety valve, an auxiliary safety valve, etc. on its lid to prevent these valves from operating properly due to the influence of rice grains, etc., and to maintain the internal pressure of the pressure cooker at a predetermined pressure. In order to do this, a filter having a large number of vapor passage pores is placed on the back of the lid so as to cover all of the valves from below (Utility Model Application No. 55-16392).
(See Publication No. 2).

By the way, the above-mentioned filter has a cap nut fixed to its center, and this cap nut is screwed into the lower threaded part of the threaded rod provided at the center of the back of the lid. When the nut is rotated, the filter also rotates, causing the problem that the outer peripheral edge of the filter may scratch the back surface of the lid.

The object of this invention is to provide a filter attachment device for a pressure cooker that solves the above-mentioned problems.

This invention will be explained below with reference to the drawings.

The pressure cooker has a pot body 1 having a top wall 1a having an oval opening 2, and a stepped periphery 4 having a U-shaped cross section that is brought into close contact with the lower surface of the periphery of the opening 2 via a backing 5. A pressure regulating valve 6, a safety valve 7, and an auxiliary safety valve 8 are attached to the lid 3.

And on the back of M3, there is a valve 6. 7. A filter 9 is removably attached to cover all of the filters 8 from below.

This filter 9 has a large number of vapor passage pores 10 and integrally molded radial reinforcing ribs 11, and a nut-shaped filter knob 1 is provided on the lower surface of the center of the filter 9.
2 is rotatably attached with the screw opening facing upward.

That is, the filter knob main body 12a with the screw opening facing upward
A thin cylindrical portion 12b having an outer diameter smaller than that of the main body 12a is integrally provided at the center of the upper surface, and this cylindrical portion 12b
As shown by the chain line in the figure, it passes through the hole 30 drilled in the center of the filter 9 in an upwardly protruding manner, and as shown by the solid line, it is swaged to the extent that it does not touch the periphery of the hole 30. This allows the knob 12 to rotate freely.

A threaded rod 13 is provided upright in the center of the lid 3.

This threaded rod 13 is integrally provided with a flange 14 at a portion near its lower end, has an upper threaded portion 13a having a square thread formed above the flange 14, and has a lower threaded portion 13a having a triangular thread on the lower side thereof. A portion 13b is formed.

The lower threaded portion of the threaded rod 13 is inserted into the through hole 15 made in the center of the lid 3 and the through hole 17 made in the center of the loose V-shaped leaf spring 16 placed on the center of the upper surface of the lid 3. 13
b is inserted from above, and the nut 18 is screwed to the threaded portion 1'3b on the underside of the lid 3 via the packing 19 and washer 20, so that the threaded rod 13 is fixed upright to M3, At the same time, the center part of the leaf spring 16 is connected to the threaded rod 13.
It is held down from above by a collar 14.

A cap nut-shaped knob 12 at the center of the filter 9 is screwed onto the lower threaded portion 13b of the threaded rod 13.

A strip 22 is attached to the upper threaded portion 13a of the threaded rod 13 so as to be movable up and down by inserting the threaded portion 13a into a through hole 21 drilled in the center. A female screw portion 24 of a knob 23 is screwed onto the portion 13a.

The band-shaped body 22 is fastened to both ends of the leaf spring 16,
By rotating the knob 23, the strip 22 can be quickly removed.
There is a gap between the lid 3 and the lid 3.

Handles 29 are attached to both sides of the pot body 1.

These handles 29 are composed of a mounting bracket 25 fixed to the side wall of the pot body 1 with rivets, and a grip part 26 made of synthetic resin that is attached to the mounting bracket 25 with screws. A band-like body end receiving portion 27 is provided at the end.

The receiving portions 27 protrude upward from the upper surface of the top wall 1a of the pot body 1 by a required height, and each of the receiving portions 27 is provided with a U-shaped escape prevention curved edge 28 that opens inward when viewed from a plane. It is being

Both ends 22a of the strip 22 are placed on the receiving portion 27 so as to be fitted into the curved edges 28, respectively.
As a result, the strip 22 is attached to the pot body 1 in such a way that it cannot rotate horizontally.

In the above pressure cooker, in order to put the lid 3 on the pot body 1, first pick up the knob 23 and lift up the oval cover 3, then place the long diameter side above the pot body 1 on the short side of the oval opening 2 of the pot body 1. Point toward the diameter side.

The length direction of this umbilical cord-shaped body 22 is directed toward the long diameter side of the opening 2.

In this positional relationship between the two, one end of the long diameter side of the lid 3 is inserted into the pot body 1 from one of the short diameter sides of the opening 2 until the other end passes through the other end of the short diameter side of the opening 2. Insert.

When the entire lid 3 passes through the opening 2 and enters the pot body 1, the lid 3 and the band-shaped body 22 integrated therewith are rotated by 90 degrees.

At this time, the force of the spring 16 is acting on the knob 23 via the strip 22, so the knob 23 does not move freely.

By rotating the strip 22 by 60 degrees, both ends 2
2a are located above the receiving portions 27, respectively.

Next, both ends 22a of the band-shaped body 22 are placed on the receiving part 27, and in this state, the knob 23 is rotated and screwed against the force of the spring 16.

At this time, both ends 22a of the strip 22 are prevented from moving in the horizontal direction by the curved edges 28 on both sides of the receiving portion 27, so even if the knob 23 is turned, the strip 22 does not rotate.

Then, the lid 3 is gradually pulled up by rotation of the knob 23, and the peripheral edge 4 of the lid 3 is finally brought into close contact with the opening peripheral edge inside the top wall 1a via the backing 5, so that the inside of the pressure cooker is kept airtight.

When the contents such as rice grains and water in the pressure cooker are heated in this state, the solid contents such as rice grains will scatter inside the pressure cooker due to the boiling of the water, but the filter 9 is placed on the back of the M3. Therefore, these solid contents never directly adhere to the back surface of the lid 3.

Therefore, the pressure regulating valve 6 attached to the lid 3,
The valve holes of the safety valve 7, auxiliary safety valve 8, etc. will not be clogged with solid contents such as rice grains, and only steam will pass through the pores 10 of the filter 9, so these valves will operate correctly and the pressure will be reduced. Maintain a certain pressure inside the pot.

Conversely, when opening M3 after cooking, the pot body 1
Release the pressure inside, then rotate the knob 23 in the opposite direction,
At this time, the steam pressure remains in the pot body 1 slightly higher than atmospheric pressure, so the lid 3 remains in close contact with the back surface of the top wall 1a of the pot body 1. The lid 3 is lowered into the pot body 1 when the internal pressure of the pot body 1 becomes equal to the atmospheric pressure by the action of 6.

Thereafter, the lid 3 can be removed from the opening 2 of the pot body 1 by performing operations in the reverse order as described above.

When washing the filter 9 and the back surface of the lid 3, the filter 9 can be removed from the lid 3 by rotating the filter knob 12.

At this time, since the filter knob 12 is rotatably attached to the filter 9, the filter 9 does not rotate together, and therefore the outer peripheral end of the filter 9 does not slide on the back surface of M3. Therefore, the back side of the lid 3 will not be damaged.

The same applies to the case where the filter 9 is attached to the lid 3.

[Brief explanation of drawings]

The drawings show an embodiment of this invention; FIG. 1 is a partially cutaway perspective view, FIG. 2 is a half-cut front view, and FIG. 3 is an enlarged sectional view of the main part. 3...Lid, 6...Pressure control valve, 7...
...Safety valve, 9...Filter, 10...
. . . Steam passage pore, 12 . . . Filter knob, 13. Bent S screw II, 13b . . . Lower threaded portion of threaded rod 13.

Claims (1)

[Scope of utility model registration request] Valves such as a pressure control valve 6 and a safety valve 7 are attached to the lid 3.
In addition, in a pressure cooker in which a filter 9 having a large number of vapor passage pores 10 is fitted on the back surface of the lid 3 so as to cover all of the valves from below, a nut-shaped filter is provided on the center lower surface of the filter 9. A filter attachment device for a pressure cooker in which a knob 12 is rotatably attached with the screw opening facing upward, and this knob 12 is screwed onto the lower threaded portion 13b of a threaded rod 13 provided in the center of the lid 3. .