JPS635086B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The present invention provides a lid opening safety device for a pressure cooker of a type in which the bridge or lid is raised and lowered by turning the handle with the center of rotation as the point of action, and the lid is pressed against the container. Regarding.

(Problems to be Solved by the Present Invention) Pressure cookers are used with the interior in a high pressure state, and after cooking in the pressure cooker, the internal pressure is lowered before opening the lid, but the pressure cooker is used in a high pressure state. If you open the lid, the hot steam and contents inside the pot will blow out, which is dangerous. An object of the present invention is to provide a lid opening safety device that prevents the lid from opening even if a person who uses a pressure cooker accidentally falls down and forgets to lower the pressure and tries to open the lid.

(Means and effects for solving the problems) First, the pressure cooker to which the present invention is applied is of the following type.

It has a bridge stopper installed at opposite positions on the side of the container, a support provided upright on the lid, a handle screwed onto the support, and a bridge supported in the center by the handle. This is the so-called stacked lid method, in which the lid is pressed against the container by raising the lid and pressing both ends of the bridge against the bridge stopper from below.

Bridge stoppers installed at opposite positions on the sides of the container, the upper part of the container bent inward, a support provided to stand on the lid, a handle screwed to the support, and a bridge supported in the center by the handle. This is a so-called drop-lid method in which the lid is raised by turning the handle, and the lid is pushed up from below from inside the container and held down.

These types of pressure cookers are equipped with the following lid opening safety devices. A communication hole communicating in the longitudinal direction is formed in the support at the center of the lid.

A piston is arranged within the communication hole so as to be able to move up and down. When the piston is in the downward movement position, rotating the handle allows the lid to move up and down along the male column thread, allowing it to be opened and closed.

As the pressure inside the pressure cooker increases, the piston moves upward, forming a connection to both the handle nut and the strut. Here, "coupled" means that even if you try to rotate the handle, it is restricted by the support and cannot be rotated. Further, when the pressure inside the pot decreases, the piston moves downward, and the engagement between the handle nut and the column is released. In this state, the handle can be rotated and the lid can be opened.

Embodiment 1 Next, Embodiment 1 of a stacked lid system for a pressure cooker to which the lid opening safety device of the present invention is applied will be described based on FIGS. 1 and 2.

The pressure cooker 1 has a container 2 covered with a lid 3.
The device for pressing the lid 3 onto the container 2 is as follows. Bridge stoppers 4 are provided at opposing positions on the sides of the container 2. A support 5 is provided on the lid 3 in an upright manner. Male screw 6 on the outer periphery of the pillar 5
is formed. The handle 7 consists of a nut member 10 attached by a rotary knob 8 made of synthetic resin and a bolt 9. The center of the bridge 11 is supported by the handle 7. That is, there is a bridge 11 between the rotary knob 8 and the nut member 10.
The center part of is sandwiched. A female thread 12 is formed inside the nut member 10, and the handle 7 is screwed onto the column. To press the lid 3 against the container 2, the handle 7 is turned and the bridge 11 is raised together with the handle 7, and both ends of the bridge 11 are pressed against the bridge stopper 4 from below. Then, a force is exerted to press the lid 3 against the container 2 via the bridge 11, the handle 7, and the column 5.

FIG. 2 shows the vicinity of the handle 7, strut 5, bridge 11, and lid 3 in the pressure cooker 1.

A communication hole 13 is formed in the column 5 in its longitudinal direction. The lower opening 13A of the communication hole 13 of this support 5 faces the inside of the container 2, and the upper opening 1
3B faces inside the handle 7. Communication hole 13
Inside, a piston 14 is arranged so as to be able to move up and down. In FIG. 2, X indicates that the piston 14 is located at the bottom, and Y indicates that the piston 14 is located at the top.

The upper part of the piston 14 is a piston coupling part 15 having a polygonal cross section and has a large diameter to prevent it from falling into the communication hole. The lower portion 16 of the piston 14 is formed into an annular fin having a thickness approximately equal to the inner diameter of the lower portion of the communication hole 13 . Piston lower part 16
is a product that receives the pressure steam inside the pressure cooker and makes it easier to rise, and has a sealing effect that seals the pressure steam.

Further, the upper part of the communication hole 13 of the support column 5 is a support engagement part 19 having a polygonal cross section, and the lower part of the communication hole 13 is a round cross section.

An engaging portion 15 having a polygonal cross section is provided above the piston. When the piston 14 moves downward, the engaging portion 15 has a polygonal cross section 18.
and the container member engaging portion cross-sectional polygon 19 are released.

Moreover, above the engaging part 18, a spring 21 for dropping the engaging part 18 is provided.

When the lid 3 is pressed against the container 2, the piston 14 is in the lower position when there is no internal pressure and is not engaged with the handle nut engaging portion 18 and the strut member engaging portion 19. When the handle 7 is rotated, the bridge 11 moves up together with the handle 7, and both ends of the bridge 11 are pressed against the bridge stopper 4 from below. Then, a force is exerted to press the lid 3 against the container via the bridge 11, the nut fitting 10, and the support 5, thereby making it possible to seal the lid.

When the pressure cooker 1 is heated and the internal pressure begins to rise, the piston 14, which was initially at the lower X position, moves upward within the communication hole 13 of the support column 5 to the Y position as the piston disk 16 receives pressure. Then, the engaging part 15 engages with both the handle nut member engaging part 18 and the strut member engaging part 19, making it impossible to rotate the handle 7, and the bridge 11 does not go down, making it impossible to open the lid.

Before opening the lid 3, the pressure must be lowered, but even if you forget to lower the pressure and try to open the lid, the lid opening safety device of the present invention prevents the handle from rotating and allows you to open the lid. Can not.

On the other hand, when the pressure inside the pressure cooker 1 drops,
The piston 14 returns to the lower X position due to its own weight and the spring 21 for dropping the engaging portion 15. As a result, the engagement between the engagement part 15, the handle nut engagement part 18, and the strut member engagement part 19 is released, and as a result, the handle 7 can be rotated. Move down to body 2
The lid 3 can be opened by releasing the pressure on the lid.

Further, in this case, it is necessary to process the inner wall of the communicating hole 13 with fluororesin, or to improve the processing accuracy of the inner wall of the communicating hole 13 and the piston lower part 16.

Note that the handle nut 10 has an air vent hole 22.
is formed through the handle nut 10, and the pressure in the internal space 23 of the handle nut 10 causes air to escape from the air vent hole 22 as the piston 14 rises, making it easier for the piston 14 to move upward.

[Brief explanation of the drawing]

FIG. 1 is an overall sectional view of a stacked lid type pressure cooker using the present invention. FIG. 2 is a sectional view of essential parts of the pressure cooker of Example 1. 5... Support column, 13... Communication hole, 14... Piston, 18, 19, 20... Engaging portion.

Claims (1)

[Claims] 1. A pressure cooker whose lid is opened by turning a handle at the center of rotation, which uses a piston on the center axis of rotation that moves up and down depending on the pressure inside the pot to stop and transmit rotation. Opening safety device.