JPS5849249B2 - pressure cooker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pressure cooker, and more particularly to a mounting structure between a pot body and a lid of a pressure cooker.

In a pressure cooker, the mounting structure between the pot body and the lid is extremely important because the internal pressure increases, but this invention increases the strength of the lid and ensures the engagement between the pot body and the lid. This pressure cooker is provided with a groove 2 which bulges upward at the outer peripheral edge of a lid 1 and opens downward.

This groove 2 increases the stiffness of the outer circumference of the lid 1 and prevents the lid 1 from being deformed when the pressure inside the inner pot 17 of the pot body 3 that opens upward increases.

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

The packing 4 receives pressure within the inner pot 17 during use.

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

A male-threaded rod 6 extends upwardly 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, so that when the internal pressure of the inner pot exceeds a predetermined value, the internal pressure is released to the outside.

A female threaded sleeve 10 is embedded in the handle 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 handle 9.
The arm 12 is attached to the handle 9 by screwing it in.

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

A pair of fasteners 14 are attached to the outer frame 19 of the pot body 3, which holds the outer pot 1B, so as to extend above the inner pot 17.

In use, the periphery of the lid 1 is seated on the periphery of the opening of the inner pot 17 via the packing 4.

At this time, the opening periphery of the inner pot 17 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 inner pot 1γ and the lid 1, and between the inner wall of the groove 2 and the opening. A gap 15.16 should be left between the outer wall and the peripheral edge.

After placing both ends of the arm 12 in a position where they can be engaged with the stopper 14, the handle 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 inner pot. 17 through the packing 4.

Since the packing 4 is exposed to internal pressure, it can be deformed by receiving high internal pressure.

Therefore, if the safety valve 8 does not work and the internal pressure rises abnormally, the packing 4 deforms and makes the gaps 15 and 16 communicate,
Release pressure to the outside.

In the illustrated example, the pot body 3 includes an inner pot 17, an outer frame 19, and a heat insulating material 2.
0, and uses an electric heater 21 as a heat source.

The inner pot 1γ 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 not easily affected by external force.

When the arm 12 contacts the stopper 14, the lid 1 pushes the inner pot 17 downward, bringing the bottom of the inner pot 17 into close contact with the bottom of the outer pot 18.

Therefore, the heat of the electric heater 21 is efficiently transferred to the inner pot 17. Less heat loss.

As is clear from the above, the lid is provided with a groove that bulges upward at its periphery and opens downward, increasing its strength and reducing deformation. Bring the periphery of the part close together. It is safe because the packing can be deformed by internal pressure.

In addition, 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 the deformation of the lid is small.

[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 ... Packing, 5 ...
... Reinforcement plate, 6 ... Rod, 7 ... Guide, 8 ... Safety valve, 9 ... Handle, 10 ... Sleeve, 12... Arm, 14... Fastener, 15, 16...
gap.

Claims (1)

[Claims] 1 It has an inner pot that opens upward, and a lid whose periphery is seated on the periphery of the opening of the inner pot, and an outer pot located outside the inner pot extends upward from the periphery of the opening of the inner pot. The lid has a male-threaded rod and a safety valve extending upwardly through a reinforcing plate fixed to the center thereof, and a safety valve extending upwardly from the periphery of the lid. The lid is seated on the periphery of the opening of the inner pot via a packing disposed in the groove, and the handle screwed with the rond is provided with an arm having a substantially inverted U-shaped cross section. , the lid is seated on the periphery of the opening of the inner pot, the bottom wall of the inner pot is placed on the bottom wall of the outer pot, the handle is screwed onto the rod, and With the upwardly extending guide inserted into the downward opening of the arm, both ends of the arm can be secured to the mounting bracket of the outer pot, and by rotating the handle, both ends of the arm are attached to the mounting bracket. The reaction force of the pressure contact brings the peripheral edge of the lid into close contact with the peripheral edge of the opening of the inner pot via the packing, and leaves a gap between the peripheral edge of the lid and the peripheral edge of the opening of the inner pot. A pressure cooker further characterized in that the reaction force brings the bottom of the inner pot into close contact with the bottom of the outer pot.