JPS5818086B2 - Lid locking device for pressure cooker - Google Patents

Description

[Detailed Description of the Invention] A conventional pressure cooker has a lid that is attached to the pressure cooker body by dropping the lid onto the pressure cooker body and turning a handle screwed onto a threaded bolt attached to the lid via a support rod. A pressure cooker that is configured to be tightened by pulling it towards the inside edge of the pot, or a pressure cooker with a lid placed on the body of the pressure cooker, and a handle screwed onto a threaded bolt attached to the lid via a support rod, then the lid is tightened. There is a pressure cooker that is configured to tighten while pressing against the rim of the main body.

When cooking under pressure using these pressure cookers and opening the lid after cooking, lower the pressure inside the pot by raising the small lever of the pressure regulator attached to the lid to release steam and lower the pressure inside the pot. It is safe to open the lid after all the pressure steam has released, but if you open the lid too quickly and while the pressure steam is releasing, the contents will squirt out due to the residual pressure, causing cooking problems. There is a risk of accidents such as burns for those who do this.

In view of the above points, the present invention utilizes the internal pressure of the pressure cooker to lock the tightening handle of the lid, and the tightening handle is held in the locked state until the pressure steam is completely released. By configuring, the above conventional drawbacks are eliminated,
The present invention aims to provide a pressure cooker with a high degree of safety.

The present invention will be described in detail below with reference to the drawings.
A drop-lid type pressure cooker i is shown in the figure and FIG.
In the figure, 1 is a pressure cooker body, 2 is a locking edge formed by bending the mouth edge of the pot body 1 inward, and 3 is a lid that closes the pot body 1.
A threaded bolt 5 is vertically attached to the outside of the center of the lid plate 4, which is shaped so that it can be dropped into the pot body 1 and engaged with the locking edge 2. The hook is inserted through the center of the supporting rod 6 to be passed through the mouth edge of 1, and the tightening handle 1 is screwed on.

Reference numeral 8 denotes an engagement pin which is attached to the lid plate 4 so as to be pushed out as the pressure inside the pot body 1 increases, and its upper end is colored red to make it conspicuous.

9 is a long hole provided in the handle 7 in the shape of an arc;
When the handle 7 is turned to its tightening limit position, that is, the position where the lid 3 cannot be tightened any further, there is a circular arc shape from the position facing the engagement pin 8 to a position where it is safe even if the tightening pin is loosened a little. The holes are drilled over the permissible range.

Reference numeral 10 denotes a pressure regulating device attached to another position on the cover plate 4, and when a small lever 11 attached to the upper end of the device is raised, a built-in valve is opened and pressure is released from a group of small holes provided on the side. The pot body 1 is configured to discharge steam within the pot body 1.

Reference numeral 12 is a safety device installed at another position on the lid plate 4, and the pressure regulating device 10f becomes malfunctioning due to clogging with the contents being cooked, etc., and the pressure inside the pot body 1 becomes abnormally high. In such a case, it is operated so that it comes off from the steam plate 4 and allows steam to escape.

In the pressure cooker in the above embodiment, the mouth of the main body 1 is circular, the lid 3 is also circular, and is curved so that it can be dropped into the main body 1, and a spring curved in the opposite direction is provided on the top surface. The rim of body 1 is oval, and the lid 3 is also shaped like body 1.
An oval shape that can be pushed inward may be used.

3 and 4, there is shown a stacked lid type pressure cooker 1, in which 13 is the pressure cooker body, 14 is the lip of the pot body 1 that is bent slightly outward, and 15. Reference numeral 15 denotes locking protrusions fixed to project upwardly from the mouth rim 2 from two diametrically opposed locations on the outside of the pot body 1; 16;
1 is a lid that closes the pot body 13, and a screw bolt 18 is vertically attached to the central part of the lid plate 17, which is formed so as to be overlapped so as to cover the mouth rim 14, and both ends are secured to the screw bolt 18. The center part of the support rod 19 that can engage with the protrusions 15, 15 is inserted through it, and the tightening handle 20 is screwed on.

Reference numeral 21 indicates an engagement pin configured similarly to the engagement pin 8 in the above embodiment, and 22 indicates an engagement pin t similar to the elongated hole 9 in the above embodiment.
The elongated hole 23 is a pressure regulating device, 24 is a small lever thereof, and 25 is a safety device.

Next, to explain the operation of the lid locking device in the pressure cooker shown in each of the above embodiments, turn the handle 7 or 20 several times to lock the lid 3 onto the locking edge of the pot body 1. When the handle 7 or 20 is tightened and turned to the limit position, the support rod 6 comes into pressure contact with the rim of the pot body 1, or the support rod 19 comes into pressure contact with the locking protrusions 15, 15,
The lid 3 or 16 is tightened to seal the pot body 1 or 13.

In this state, if you heat the pot body 1 and pressure cook it,
The pressure inside the pot body 1, 13 increases, and the engagement pin 8 or 2
1 is pushed out from the dotted line position in FIG. 1 or 3 to the position where it fits into the elongated hole 9 or 22 under the pressure, thereby locking the handle 7 or 20.

When pressure cooking is finished and the lid 3 or 16 is to be opened, the small lever 11.23 of the pressure regulator 10 or 22 is raised to lower the pressure inside the pot body 1, 13 while discharging steam.

While there is residual pressure inside the pot body 1.13, the engagement pins 8, 21 are held in the elongated holes 9, 22, and the handle 7.20 is in the locked state, so the lid is closed. I can't open 3,16.

When the residual pressure inside the pot body 1 disappears and the pressure drops to a level below which the contents do not blow out even when the lid is closed, the engaging pins 8 and 2
1 falls to its original position under its own weight and is removed from the elongated hole 9.22, thereby releasing the locked state of the handle 7.20.

Then, by turning the handle 7.degree. 20 in the direction of the arrow in FIGS. 2 and 3, the tightening is released and the lid can be opened.

It should be noted that the shapes and structures of the retaining pins and elongated holes shown in each of the above embodiments may be modified as appropriate within the scope of the present invention.

Since the present invention is configured as described above, when the handle is turned to tighten the lid to the rim of the pot body, the engagement pin is located within the range of the elongated hole formed in the handle, Even if there is an error caused by turning the handle too much or too little, the retaining pin will be reliably pushed into the elongated hole during pressure cooking.

After pressure cooking, while the steam has not completely escaped from inside the pot body and there is residual pressure, the retaining pin is held in the position where it engages with the elongated hole due to that pressure, and the handle is held in the position where the engaging pin and the elongated hole are engaged. Even if you turn it by the distance from the end, turning it that much will only loosen the sealing of the lid to some extent, but you won't be able to open the lid to the extent that the contents will squirt out.

When the steam has completely escaped and the residual pressure has disappeared, and the pressure inside the pot body has dropped to a safe level that will prevent the contents from spewing out, the retaining pin will open by its own weight or by pushing with chopsticks, etc., into the elongated hole in the handle. Since the lid can be easily removed from the lid, you can confirm that it is safe to open the lid, and you can open the lid with confidence.

Therefore, there is no mistake in the opening operation of the lid, and there are no accidents such as the contents spouting out due to a mistake in the opening operation and causing burns to the person cooking, thereby providing a pressure cooker with a high degree of safety. It has various effects such as being able to

[Brief explanation of the drawing]

The drawings show embodiments of the present invention; FIG. 1 is a sectional view of a drop-lid pressure cooker, FIG. 2 is a top view of the same pressure cooker, FIG. 3 is a sectional view of a stacked-lid pressure cooker, and FIG. The figure is a top view of the same pressure cooker. 1... Pressure cooker body, 2... Locking edge, 3
...Lid, 4...Lid plate, 5...
Screw bolt, 6...Support rod, 7...Tightening bundle, 8...Engagement pin, 9...
...Long hole, 10...Pressure regulator, 13...
...Pressure cooker body, 14...Old connection, 15...
...Latching protrusion, 16... Lid, 17...
Cover plate, 18...Screw bolt, 19...
Support rod, 20... Tightening bundle, 21...
...Engagement pin, 22...Elongated hole, 23...
...Pressure adjustment device.

Claims (1)

[Claims] 1 Attach a threaded bolt to a lid plate formed to be dropped into or stacked on the pressure cooker body, insert a supporting rod that supports the lid plate against the pot body into the screw bolt, and attach the lid plate to the lid plate. In a pressure cooker with a handle screwed onto the rim of the pot body, the lid plate is fitted with an engaging pin that is pushed out as the pressure inside the pot body increases, and the handle is fitted with a locking pin that is pushed out when the pressure inside the pot body increases. 1. A locking device for a lid in a pressure cooker, characterized in that an elongated hole into which an engagement pin can be engaged is provided in an arc-shaped portion that includes a portion facing the engagement pin.