JPS5847175B2 - Lid structure for pressure cooker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lid structure for a pressure cooker, and more particularly to a center structure of a lid for a pressure cooker.

In a pressure cooker, the structure of the lid is extremely important because the internal pressure increases.This invention relates to a lid structure for a pressure cooker that increases the strength of the lid. A groove portion 2 is provided which bulges upward and opens downward.

This groove portion 2 increases the strength of the outer peripheral portion of the lid 1 and prevents the lid 1 from being deformed when pressure increases inside the pot body 3 that opens upward.

An elastically deformable packing 4 is disposed within the groove 2.

The gasket 4 is adapted to receive pressure within the pot body 3 during use.

A reinforcing plate 5 is fixed to the center of the lid 1 to increase the strength of the center.

A male-threaded rod 6 extends upward through the lid 1 and reinforcing plate 5 and is fixed to both.

The reinforcing plate 5 is provided with a guide 7 extending upward.

Further, a safety valve 8 is attached to the lid 1 to release the internal pressure to the outside when the internal pressure exceeds a predetermined value.

A female threaded sleeve 10 is embedded in the bundle 9, and the sleeve 10 and the rod 6 can be screwed together.

The upper end of the sleeve 10 is connected to a screw 11 from the top of the bundle 9.
is screwed in.

An arm 12 is attached to the bundle 9.

The arm 12 has a substantially inverted U-shaped cross section and has an opening 13 facing downward.

A pair of fasteners 14 extend upwardly on the pot body 3.

In use, the periphery of the lid 1 is seated on the periphery of the opening of the pot body 3 via the gasket 4.

At this time, the opening periphery of the pot body 3 contacts only the packing 4 without contacting the inner wall of the groove 2, and the gap between the inner wall of the opening periphery of the pot body 3 and the lid 1, and between the inner wall of the groove 2 and the opening. Gaps 15 and 16 are left between the peripheral outer wall and the outer wall.

After placing both ends of the arm 12 in a position where they can be engaged with the stopper 14, the bundle 9 is rotated, the arm 12 is raised, and both ends of the arm 12 are brought into pressure contact with the stopper 14, and the reaction force pushes the lid 1 into the pot body. 3 through the gasket 4.

Since the gasket 4 is exposed to internal pressure, it can deform in response to high internal pressure.

Therefore, if the safety valve 8 does not work and the internal pressure rises abnormally, the gasket 4 deforms and communicates the gaps 15 and 16 to release the pressure to the outside.

At this time, the center part of the lid can sufficiently withstand the internal pressure due to the reinforcing plate and will not be deformed.

In the illustrated example, the pot body 3 is composed of an inner pot 17, an outer pot 18, and an outer frame 19, and uses a heat insulating material 20 and an electric heater 21 as a heat source.

The inner pot 17 has a thick wall at its upper part, has high strength, and has little deformation.

Further, since the stopper 14 is located inside the outer surface of the pot body 3, it is hardly affected by external forces.

As is clear from the above, the strength of the central part of the lid is ensured by the reinforcing plate, and this part receives the reaction force from the arm, so there is little deformation of the lid, and it is not affected by increases in internal pressure. .

[Brief explanation of the drawing]

The figure is a sectional view showing a pressure cooker as an example of the present invention. In the diagram: 1...lid, 2...groove, 3...
... Pot body, 4 ... Patchkin, 5 ...
...Reinforcement plate, 6...Rod, 7...Guide, 8...Safety valve, 9...Bundle, 10...Sleeve, 12... Arm, 14... Fastener, 15, 16...
gap.

Claims (1)

[Claims] 1 A reinforcing plate is fixed to the center of the lid, a rod extending from the inside to the outside of the lid is fixed to the center, and a sleeve is attached to a bundle that supports an arm whose both ends can be engaged with a stopper on the outer frame. embedded therein so that the sleeve and the rod can be screwed together, the outer frame is held in the outer pot via a heat insulating layer, a portion where the stopper is fixed to the outer frame, and an angular locking portion. The locking part of the stopper is positioned inward from the outer circumferential surface of the outer frame and extends to the upper part of the outer pot, and the outer circumferential part of the lid is located inward from the outer circumferential surface of the outer pot. A lid structure for a pressure cooker, characterized in that the lid structure is seated via a seal at an opening of the inner pot located inward from the inner pot body.