JPS637146Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a pressure cooker, particularly a stacked lid pressure cooker.

[Conventional technology and its problems]

A stacked lid pressure cooker consists of a pot body, a lid, and a lid holding arm.The lid has a screw shaft fixed upright in the center, into which is screwed a cap nut hanging down from the knob, and the lid holding arm is fixed in the center. is loosely received in the cap nut of the knob, and both ends thereof are engaged with hook-shaped locking portions provided upright on the pot body, and both ends of the lid holding arm are connected to the hook-shaped locking portions. When the cover nut is engaged, grasp the knob and rotate it in the direction of loosening the cap nut, the cover holding arm will rise and engage the hook-shaped locking part, preventing further rise. is pushed down and the pot becomes completely sealed,
By heating and boiling, the internal pressure (steam pressure) of the pot increases.

By the way, if you stop the heating after heating for a predetermined period of time and open the lid when steam no longer spouts out from the regulating valve, pressurized steam will still accumulate and the steam will spout out, potentially causing burns.

Therefore, various attempts have been made to add a structure that prevents the lid from being opened by rotating the knob if there is still pressure steam in the pot even after the heating is stopped, but all of them are complicated and the knob is too tight. There were some cases in which it was difficult to ensure that rotation was prevented.

[Means for solving problems]

In order to solve the above problems, this invention has a vertical shaft type float airtightly penetrating and supporting the lid near the side of the upright screw shaft, and the cap nut of the knob is attached to the bottom of the lid holding arm. The pressure cooker is provided with a sleeve that rotates together with the cap nut and is slidable in the axial direction, and the lower end of the sleeve is integrally provided with a rim having a semicircular arc notch that fits into the float of the lid. That is.

[Effect]

At the final stage of attaching the lid to the pot body and turning the knob to raise the lid presser arm and press the lid, press the semicircular arc notch on the sleeve rim closest to the float.
Turn the knob slightly in either direction until it lines up with the side of the float, then stop and heat the pot.

When steam is generated in the pot and the internal pressure rises, the float on the lid floats up and fits into the opposing notch on the sleeve rim, and even if you stop heating the pot and try to open the lid after a while, the float still floats to the surface. If there is residual steam, the knob will not turn and the lid cannot be opened.

〔Example〕

In FIG. 1 (front view), 1 is a pot body, 2 is a lid, and 3 is a lid holding arm.

As shown in Figure 2 (enlarged side view), the lid 2 has
A screw shaft 4 is fixed at the center in an upright position, and a cap nut 6 fixed to hang down from a knob 5 is screwed into this screw shaft.

The lid holding arm 3 has its center part loosely fitted into a cap nut 6, and is pushed up by the cap nut when loosening the cap nut, and both ends of the lid holding arm 3 are connected to hook-shaped locks provided upright on the pot body 1. Since it is engaged with the portion 7, further rise is prevented, and the lid is then pressed against the pot body, and the gasket 9 in the downward groove 8 on the periphery of the lid is pressed to form an airtight closed lid.

10, steam spews out when the steam pressure inside the pot exceeds a certain level. This is a weight type pressure regulating valve.

The above is a known structure. This invention is particularly advantageous in that a vertical shaft type float 1 is placed adjacent to the side of the screw shaft 4 on the lid.
1 is penetrated and supported in an airtight manner, and is set so that it is recessed when the pressure inside the pot is normal, but when the internal pressure increases, it floats up and protrudes from the top surface of the lid. Reference numeral 12 denotes a float support tube hanging from the lower surface of the lid 2; reference numeral 13 denotes an axial hole formed in the float; the upper end is closed and a communication hole 14 to the outside air is provided on the upper side; and 15 is a valve loaded in the axial hole 13. The ball, 16 is a valve seat formed at the lower end of the shaft hole 13, and 17 is a valve ball holding spring, and this float also functions as a safety valve.

A sleeve 18 is attached to the cap nut 6 of the knob 5 on the lower side of the lid holding arm 3, and the sleeve 18 rotates together with the cap nut 6 by fitting the key 19 and the key groove 20, but is slidable.

Further, the lower end of the sleeve 18 is provided with a flange 21,
A plurality of semi-circular notches 22 are formed on the periphery of the rim to fit around the circumferential surface of the float 11. Rotate the knob 5 to close the lid, which is closest to the float at the final stage of the operation. By turning the knob to align the notch 22 at the position with the float, when the pot is heated and the internal pressure increases and the float floats up, the notch 2
2 is fitted into the float, and while the float is rising, the knob cannot be rotated (opening the lid). 23
24 is a spring that constantly pushes the sleeve 18 downward; 24 is a snap spring for receiving the sleeve 18, which is attached to the lower end of the cap nut 6;
Reference numeral 5 denotes a rotation prevention piece for the lid holding arm 3.

〔effect〕

The pressure cooker of this invention has a float on the lid,
The cap nut of the knob is provided with a sleeve on the underside of the lid holding arm that rotates with the cap nut and can slide freely, and the lower end of the sleeve is provided with a flange edge that can be fitted to the side surface of the float. Since a semi-circular notch is formed, when the knob is turned to tighten the lid, the semi-circular notch closest to the float can be aligned with the side of the float at the final stage of the tightening operation. When the pot is heated and steam is generated inside the pot, internal pressure increases and the float floats up, the sleeve (cap nut) cannot be rotated, and the lid cannot be opened by turning the knob while the float is floating. Therefore, there is no danger of burns caused by steam gushing out if the lid is accidentally opened while steam is still remaining in the pot.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view of an example of the pressure cooker according to the present invention, Fig. 2 is an enlarged longitudinal sectional side view of the main parts of the same, and Fig. 3 is the main part of the same with the knob and lid presser arm removed. FIG. 4 is a partially cutaway exploded perspective view of the main parts of the same. DESCRIPTION OF SYMBOLS 1... Pot body, 2... Lid, 3... Lid holding arm, 4... Screw shaft, 5... Knob, 6... Cap nut, 7... Hook-shaped locking part, 11... Float, 18
...Sleeve, 19...Key, 20...Keyway,
21...Brim edge, 22...Notch.

Claims (1)

[Scope of utility model registration request] Consisting of a pot body, a lid, and a lid holding arm, the lid has a screw shaft fixed upright in the center, into which a cap nut hung down and fixed to the knob is screwed, and the lid holding arm has its center part loosely attached to the cap nut. In the pressure cooker which is fitted and whose both ends are engaged with hook-shaped locking parts provided upright on the pot body, a vertical shaft-shaped float is airtightly penetrated and supported in the lid adjacent to the side of the screw shaft; The cap nut is provided with a sleeve on the underside of the lid holding arm that rotates together with the cap nut and is slidable in the axial direction, and at the lower end of the sleeve, there is a semicircular notch on the periphery that fits into the float of the lid. A pressure cooker characterized by having an integral rim with a rim.