JPS6018174Y2 - Pressure cooker safety device - Google Patents

Description

[Detailed description of the invention] This invention is a safety device for pressure cookers such as pressure cookers and pressure cookers to prevent the lock between the container handle and lid handle from being touched unless the pressure inside the container is sufficiently reduced. Regarding safety equipment.

Pressure cookers have a bayonet engagement method in which ribs are intermittently formed around each periphery of the container and the lid, and the lid is covered and rotated to create a sealed pressurized container. According to the Consumer Product Safety Act, when removing the lid from a container, pressure cookers of this type are required to first release the pressure inside the container and then install a safety device that allows the lid to be rotated. ing.

For this reason, various safety devices have been proposed in the past, but most of them release the pressure inside the container in conjunction with the operation of unlocking the container handle and lid handle. Since the lock was already released and the lid could be rotated even before a significant decompression was seen, there was a risk that residual steam would blow out, so it could not be called a complete safety device.

The present invention was developed by focusing on the above points, and its purpose is that unless the pressure inside the container is sufficiently reduced, the lock between the container handle and the lid handle will not be released, and the lid cannot be rotated. The objective is to provide a safety device that cannot be moved.

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, 1 is a container, 2 is a lid of the container 1, and 3 is a pressure regulating valve disposed on the lid 2, all of which are shown by imaginary lines.

4 is a container handle, and 5 is a lid handle.

In FIG. 2, 6 is a container-side rib, and 7 is a lid-side rib, each of which is provided intermittently at appropriate intervals for bayonet engagement.

8 is a sealing backing made of an elastic material such as rubber, and the lid body 2 is
It is fitted inside the outer periphery of the

The safety device of the present invention is housed within the lid handle 5, and will first be described with reference to FIG. 3, which shows an embodiment of the safety device portion.

In the figure, reference numeral 9 designates an operating knob, and one end of an operating lever 10 of the pressure regulating valve 3 disposed on the lid body 2 is attached to the upper surface, and an upwardly sloping portion 11 is formed at the free end of the operating lever 10. The top of the valve body of the pressure regulating valve 3 is fitted into the slit provided in the inclined portion 11.

Reference numeral 12 is a sliding plate and is formed in a U-shape having a pair of side plates 13, 13, and the connection bases of the side plates 13, 13 are connected to the operation knob 9 by a support rod 14, and each side plate 1
The free ends of 3 and 13 are formed in a sawtooth shape with an inclined surface 15, and 16 is a sliding guide protrusion provided on the outer wall of each side plate 13, 13.

Reference numeral 17 is a locking rod, which is interposed between the pair of side plates 13 and 13, and a spring 19 is used to press a support plate 18 integrally formed at the upper end of the locking rod 17 against the flat upper surface of the side plates 13, 13. One end of the support plate 18 is fixed to the support plate 18 .

Reference numeral 20 is a safety rod, which is interposed between the serrated portions of the pair of side plates 13, 13, and has a stepped portion 21 on its upper surface and an inclined surface 22 on the surface of the lock rod 17 facing the support plate 18.
is formed, and one end of a spring 23 is fixed to the stepped portion 21 (note that the safety rod 20 is also provided with a guide protrusion like the sliding plate 12, but it is not shown).

FIG. 2 shows a schematic view of the safety device housed in the lid handle 5, and the operating knob 9 is inserted into the upper surface of the lid handle 5 by penetrating the support rod 14 into a long hole 24 drilled in the lid handle 5. The guide protrusions 16, 16 provided on the pair of side plates 13, 13, which are arranged in
．． 25 and is pressed into place.

The other end of the spring 19 fixed to the support plate 18 is connected to the lid handle 5.
The lock rod 17 is attached to the inner wall of the lock rod 17 and urges the lock rod 17 downward.

One end of the safety rod 20 penetrates through an opening 27 formed in the side wall of the lid body 2 and can press the back surface of the sealing backing 8, and the other end of the spring 23 fixed to the stepped portion 21 is inserted into the lid handle 5. It is attached to a receiving plate 28 protruding from the inner wall.

The operation of the safety device according to the present invention constructed as above will be explained with reference to FIGS. 2 and 3.

The container 1 is covered with the lid 2, the lid handle 5 is rotated to overlap the container handle 4, and the ribs 6.7 on the container side and the lid side are engaged for bayonet engagement.

At that time, since the lower end of the locking rod 17 is formed in an arc shape, when it comes into contact with the container handle 4, it rises slightly against the spring 19, and the safety rod 20 is also slightly displaced to the left), and then the container handle 4 4, the container handle 4 and the lid handle 5 are completely locked and ready for cooking (the safety device is in the state shown in FIG. 3a).

In order to remove the lid 2 after cooking is finished, the pressure inside the container must be released first, but in this invention, when the operating knob 9 is pulled to the right, the operating lever 10 is also moved to the right at the same time. move,
The valve body of the pressure regulating valve 3 rises due to the inclined portion 11 at its free end, thereby releasing the pressure inside the container.

When the operating knob 9 is operated to the right, the sliding plate 12 is slid to the right, and the inclined surface 15 of the sliding plate 12 causes the support plate 18 to rise against the spring 19.

Therefore, the locking rod 17 rises to come out of the engaging hole 26 of the container handle 4, but the lock is not completely released.

Further, as the support plate 18 rises, the safety rod 20 moves to the left against the spring 23 by its inclined surface 22, passes through the opening 27 of the lid body 2, and presses the back surface of the sealing backing 8. becomes.

Subsequently, when the operating knob 9 is pulled to the right to release the lock, the safety rod 20 is further pushed out to press against the back of the sealing backing 8, but if the pressure inside the container is still high, the safety rod 20 The above extrusion of is prevented.

Therefore, the locking rod 17 cannot rise, and the sliding plate 12 cannot slide to the right.

In other words, the operation knob 9 cannot be operated to the right, and the container handle 4 and lid handle 5 cannot be completely unlocked.

When the internal pressure of the container is completely reduced, the safety rod 20 can be pushed out, that is, the operation knob 9 can be operated to the right (the sliding plate 1 that raises the lock rod 17
2), the locking rod 17 can be completely pulled out from the engagement hole 26 of the container handle 4 (the state shown in Figure 3), and the lid handle 5 can be rotated. state.

As explained above, the safety device of the present invention cooperates with the locking mechanism of the container handle and lid handle, in particular, by a safety rod that can press the back side of the sealing backing, and the safety device is designed to prevent the pressure inside the container from being sufficiently reduced. Since the lock cannot be completely unlocked because the safety lever disables the lock release operation, a conventional lock mechanism and a pressure regulating valve are simply linked together, or a lock mechanism simply seals the backing. Compared to those that are pressed and deformed, they are extremely safe, easy to use, and highly practical.

[Brief explanation of the drawing]

FIG. 1 is a side view of a pressure cooker equipped with the safety device of the present invention, and FIG. 2 is a longitudinal sectional side view of the pressure cooker with the safety device housed inside the lid handle. FIG. 3 is a perspective view of the safety device, and FIG. 3A shows a state in which the container handle and lid handle are locked, and FIG. DESCRIPTION OF SYMBOLS 1... Container, 2... Lid body, 3... Tapping pressure adjustment valve, 4... Container handle, 5... Lid handle, 8... ... Sealed backing, 9...
Operation knob, 10... Operation lever 11...
・Slanted part of operation lever, 12...Sliding plate, 15
... Slanted surface, 17 ... Lock rod, 20
...Curved safety rod, 22...Slope surface, 26...
...Engagement hole.

Claims (1)

[Scope of utility model registration request] In a bayonet engagement type pressure cooker consisting of a container, a lid body, a container handle, a lid handle, and a sealing backing, one end of an operating lever for opening and closing a pressure regulating valve is fixed to an operating knob, and an operating lever is fixed in the lid handle. A sliding plate that can be slid in the longitudinal direction of the lid handle in conjunction with the knob, and a sliding plate that is displaced orthogonally to the sliding direction as the sliding plate slides, and that is inserted into the engagement hole provided in the container handle. It consists of an insertable and removable locking rod, and a safety rod that can slide in the longitudinal direction of the lid handle as the locking rod is displaced, and can press the back surface of the sealing backing through an opening provided in the side wall of the lid body. A safety device for a pressure cooker characterized by housing a safety device.