JPS6145445B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pressure cooker in which the internal pressure can be maintained at a specified value by fitting a lid into a container with constant pressure.

Conventionally, stacked-lid pressure cookers used in general households have a screw bolt protruding from the center of the lid that fits into the opening of the container, and the end of the container is hooked into the screw rod. The lid is fitted onto the container by screwing the pressure knob loosely engaged with the lifting rod, which press-fits the lid onto the container, and the end of the lifting rod is then hooked. While locking the lid to the shape locking part, tighten the pressure knob and raise the elevator lever to press the lid, and then press the lid into the container for cooking. When fitting, since the pressure knob is rotated to press fit into the container, the screwing of the pressure knob to the threaded rod is regulated as desired by intuition, so the specified value of the internal pressure is determined by the user's screw fitting. Each pressure is different depending on the applied pressure, but the internal pressure is regulated by a pressure regulating valve installed on the lid, or by tightening the pressure knob, so the internal pressure becomes extremely high and low internal pressure. Not only will the settings be uneven, but if the pressure knob is tightened too much, the pressure knob may be damaged, making tightening impossible, or women and women who lack the strength may find it difficult to prevent internal steam leakage due to loosening. In some cases, this caused the lid to be removed smoothly from the container.

In the present invention, a pressure knob in which a lifting rod that presses the lid against the container is loosely fitted is screwed onto a screw rod protruding from the top surface of the lid, and the end of the lifting rod is attached to the side wall of the container. In a pressure cooker in which the lid body is press-fitted into the container by locking the hook-shaped locking member and rotating the pressure knob, the guide screw tube with the lifting rod loosely locked to the screw rod is screwed. The lid body is press-fitted into the container by adjusting the rotation restriction of the pressure knob with the rotation restriction device, which is connected to the guide screw. To make it possible to equalize the internal pressure settings of ultra-high pressure and low pressure by regulating pressurization and setting the internal pressure of a pressure cooker to a predetermined specified value. To eliminate any damage to the pressure knob due to over-tightening of the pressure knob, and to eliminate steam leakage due to tightening or not tightening the pressure knob. To enable safer internal pressure adjustment than a normal load-type pressure adjustment valve provided on a lid body. To prevent burns caused by vapor emission by allowing the lid to be opened from the container when the internal residual pressure becomes reduced pressure. It is intended for such purposes.

Here, one embodiment of the pressure cooker according to the present invention will be described below with reference to the drawings.

In the figure, reference numeral 1 denotes a metal container, which is formed to have a pressure-resistant structure and whose opening is bent into an S-shaped cross section and reinforced. Reference numeral 2 denotes a lid that is fitted into the opening of the container 1. It has a pressure-resistant structure to withstand high pressure, and is tightly fitted into the downward circumferential groove 3 provided near the outer periphery (preferably with a gauge pressure of about 1.8 to 2.0 kgf). Packing 4 that enables /cm ² )
is fitted. Reference numeral 5 denotes a screw rod protruding from the center of the upper surface of the lid 2, which protrudes through the lid 2, and has one end secured to the rear surface of the lid 2 with a nut 6.
Reference numerals 7 and 7 indicate hook-shaped locking parts of lifting rods, which will be described later, which are protruded from the side wall of the container 1, and the upper parts thereof are opposed to each other, and the middle part is preferably a top or a trough, and the other part is an inclined wall. , is fixed to the container 1 together with a pair of left and right handles 8, 8. Reference numeral 9 denotes a lifting rod for press-fitting the lid 2 into the container 1, which is formed into an arcuate front shape, and whose ends are shaped like hook-shaped locking portions so that both left and right ends fit into the hook-shaped locking portions 7, 7. 7, and is formed substantially the same as 7. 1
0 is a guide screw cylinder that loosely locks the lifting rod 9 and screws it freely into the screw rod 5, and has a stepped portion 11 at the middle part of the outer periphery.
The central part of the lifting rod 9 is loosely inserted into the stepped portion 11 via the washer 12 and supported like a balance rod. Reference numeral 13 denotes a pressure knob linked to the guide screw tube 10, which has a downward recess 14 in its lower part, a protruding shaft 15 protruding into the recess 14, and the protruding shaft 15 is loosely inserted into the guide screw tube 10. Rotation regulating device A that is locked and provided in the recess 14
This makes it possible to restrict pressurization of the lid 2 to the container 1. The rotation regulating device A includes two ratchets 16 and 17 that are attached to the protruding shaft 15 in the recess 14 and have trapezoidal concave and convex engaging portions A, I', and Ro' on their corresponding surfaces. , one end contacts the lower ratchet 16 that is loosely fitted to the protruding shaft 15, and the other end contacts the guide screw 10.
The upper ratchet 17 is fixed or fitted into the recess 14 of the pressure knob 13 so as to rotate together with the protruding shaft 15. Then, due to the rotation of the pressure knob 13, the unloaded lifting rod 9 rises as the guide screw 10 rises, and both left and right ends of the lifting rod 9 are engaged with the hook-shaped locking parts 7, 7. When a loading load is applied, the screw rod 5 is pressurized via the guide screw 10, the lid 2 is pressed to fit it into the container 1, and when the pressure knob 13 is further turned, the ratchet 16, 17 acts to form the concave and convex meshing portions I, I′,
When R and R' are removed, the pressure knob 13 becomes free and maintains the press-fitting state of the lid body 2. At this time, the internal pressure of container 1 is a predetermined specified value (preferably about 1.8
~2.0Kgf/ ^cm2 ). In addition, this rotation regulating device A has, for example, concave and convex engaging portions A, I', B,
Means for releasing press fit pressure regulation a by making the inclination angle of the tooth portion of B′ acute on only one side to enable tight engagement.
is applied, and by rotating the pressure knob 13 in the opposite direction, the guide screw 10 can be threaded and the elevating rod 9 can be rotated.
In some cases, the lid 2 may be lowered to allow the lid 2 to be removed. 19 is a first pressure regulating valve provided on the lid body 2;
A load body 2 of a specified weight, which is provided with a downward exhaust concave part inside the upper end opening of a ventilation cylinder 20 that protrudes from the upper surface of the lid body 2 and discharges pressure steam to the outside during boiling.
1 is fitted loosely and when a predetermined steam pressure is reached, the load body 21 is lifted by the steam and released. The gauge pressure of this first pressure regulating valve 19 is approximately 0.8Kgf/cm ²
is preferred. Reference numeral 22 denotes a second pressure regulating valve provided on the lid body 2. The valve body is installed inside the ventilation cylinder 23 of the lid body 2 via a spring, and the vapor pressure to be released is adjusted by the screw lid 24 (preferably). gauge pressure
1.3Kgf/cm ² ).

As shown in FIG. 4 of the drawings, the rotation regulating device A according to the present invention includes a guide screw tube 10 that is screwed onto the screw rod 5, and a receiving tube 25 attached to the pressure knob 13, which is loosely fitted into the guide screw tube 10.
The lifting rod 9 is loosely fitted and locked into the receiving tube 25, and a U-shaped locking spring 26 is fitted at the boundary between the circumferential surfaces of the guide screw tube 10 and the receiving tube 25.
0 and the receiving cylinder 25, and when a load is applied to the lifting rod 9 as the pressure knob 13 rotates, the locking spring 26 expands outward to release the pressure knob 13.
Also, by rotating the pressure knob 13 in the opposite direction, the locking spring 2 is released again.
In some cases, 6 is provided with a means b for releasing the press-fit pressurization restriction that connects the guide screw tube 10 and the receiving tube 25, and the lid body 2 can be removed as the lifting rod 9 descends. As shown in the figure, a ratchet mechanism 27 is provided between the guide screw 10 and the receiving tube 25, and a locking spring 26' that connects the guide screw 10 and the receiving tube 25 is provided on the lower outer wall of the receiving tube 25. The rotation regulating device A is provided with a fitting groove 28 for locking, and when a load is applied to the lifting rod 9, the locking spring 26' is disengaged from the fitting groove 28, and the pressure knob 13 is set in a free state. Furthermore, as shown in FIG. 5 and FIG. , 29 are bored, and the through holes 30, 3
0, insert the protrusions 31, 31 of the semicircular arc-shaped locking spring 26'' mounted on the pressure knob 13, and
When the tips of the protrusions 1 and 31 are positioned in the concave portions 29 and 29 and a certain load is applied to the lifting rod 9 as the pressure knob 13 rotates, the protrusions 31 and 31 move into the concave portions 29 and 29.
The locking spring 26'' is released and the pressure knob 13 is expanded.
In some cases, the lid body 2 is placed in a free state, and the lid body 2 is pressurized to fit into the container body 1 by locking with the lifting rod 9, thereby making it possible to set the internal pressure to a predetermined specified value. In this rotation regulating device A, by rotating the pressure knob 13 in the opposite direction, the protrusions 31, 31 engage with the recesses 29, 29, the locking spring 26'' is narrowed, and the guide screw 10 is closed. This enables the screw movement and the removal of the lid body 2. A means c for releasing the pressure-fitting restriction is adopted, and as shown in FIGS. Notches 32, 32 are formed in the notches 32, 3.
2, a notch 3 is made at the bottom of the pressure knob 13.
3 and 33 are provided to communicate with the notches 32 and 32, and the pressure knob 13 is equipped with a U-shaped locking spring 26'', and the end thereof is connected to the guide screw tube 10.
by engaging the notches 32, 32 of the guide screw tube 10.
In some cases, the pressure knob 13 is connected to the pressure knob 13, and in this case, in order to hide the notches 33, 33 of the pressure knob 13, elastic bodies 34, 34 are inserted into the notches 33, 33, as shown in FIG. Furthermore, a cover ring 35 may be provided inside the lower outer periphery of the pressure knob 13.

Since one embodiment of the pressure cooker according to the present invention is constructed as described above, FIGS.
When performing boiling cooking using the pressure cooker based on the embodiment shown in the figure, first place the lid body 2 into the opening of the container 1.
, turn the pressure knob 13 that has previously screwed the guide screw 10 onto the threaded rod 5 of the lid body 2, and screw the guide screw 10 connected thereto.
While raising the lifting rod 9, which is loosely locked to Then, the lifting rod 9 is locked with a certain force, and when the lid body 2 is press-fitted into the container 1 via the screw rod 5 and a predetermined pressing force is reached, a rotation restriction provided on the pressure knob 13 is applied. One of the ratchets 16 and 17 composing the device A comes off, the pressure knob 13 becomes free, and the lifting rod 9
Pressure-fit the lid 2 so that the internal pressure is maintained at a predetermined value (preferably a gauge pressure of 1.8 to 2.0 Kgf/cm ² ) by locking the pressure cooker, and then heat cooking. It is something to do. When removing the lid 2 from the container 1, turn the pressure knob 13 in the opposite direction to engage the latches 16 and 17 of the rotation regulating device A with each other, and actuate the press-fit pressure regulation release means a. If the guide screw 10 and the pressure knob 13 are integrally connected, as the guide screw 10 descends, the elevating rod 9 will come off the hook-shaped locking portions 7, and the lid 2 will be removed. This makes it possible to

Furthermore, in the case where the rotation regulating device A shown in FIG. The lifting rod 9, which is movably fitted and loosely fitted into the receiving tube 25, is made to correspond to the hook-shaped locking portions 7, 7 of the container 1, and the boundary between the circumferential surfaces of the guide screw tube 10 and the receiving tube 25 is A U-shaped locking spring 26 is fitted in the locking spring 26, and the guide screw tube 10 and the receiving tube 25 are connected in series with each other by the locking spring 26.
When the lever 9 is turned, the elevating rod 9 rises due to the spiral movement of the guide screw 10 connected thereto, and engages with the hook-shaped locking portions 7, 7 of the container 1, thereby reducing the predetermined engagement load. As a result, the locking spring 26 expands outward, the guide screw 10 and the pressure knob 13 are disconnected from each other, the pressure knob 13 becomes free, and the lid body 2 is locked by the lifting rod 9. Boiling cooking is performed by press-fitting the inner pressure so that the internal pressure is maintained at a predetermined specified value. Also, to remove the lid 2, turn the pressure knob 13 in the opposite direction.
The guide screw tube 10 and the receiving tube 25 are connected by the locking spring 26.
This allows the lid body 2 to be removed as the lifting rod 9 is lowered by means b for releasing the pressure-fitting restriction.

Next, in the case of the device equipped with the rotation regulating device A shown in FIG. A locking fitting groove 28 is provided, into which a locking spring 26' connecting the guide screw tube 10 and the receiving tube 25 is fitted, and when in use, the pressure knob 13 is fitted.
By turning the receiving tube 25 and the guide screw tube 10,
As the lifting rod 9 rises, the lifting rod 9 is raised, and when it is locked in the hook-shaped locking parts 7, 7 and a specified locking load is applied to the lifting rod 9, the locking spring 26' is engaged. Groove 28
After the lid body 2 is removed from the container 1, the pressure knob 13 is released, and pressure is regulated by press-fitting the lid body 2 into the container 1, and then boiling is performed.

Furthermore, when the lid body 2 is removed and the food is taken out after boiling, the protrusions 31, 31 can be moved into the concave portions 29, 2 by rotating the pressure knob 13 in the opposite direction.
9, the locking spring 26'' is contracted to allow the guide screw tube 10 to screw, and the lifting rod 9 is lowered by the release means c that allows the lid body 2 to be removed. 2 is removed, and the food to be cooked is taken out from the container 1.

Next, in the case of a pressure cooker in which the rotation regulating device A shown in FIGS. Pressure knob 1 drilled to correspond to 29
A semicircular arc-shaped locking spring 26'' is fitted on the outer periphery of the locking spring 26'', and projections 31, 3 provided on the locking spring 26''
1 is passed through the through holes 30, 30, and its tips are brought into contact with the concave portions 29, 29, and the guide screw tube 10 and the pressure knob 13 are connected in series, and when the lid is closed, the pressure knob 13 is turned. When the lifting rod 9 loosely locked to the guide screw tube 10 is raised and a prescribed locking load is applied to the lifting rod 9 as described above, the protrusions 31, 31 of the locking spring 26'' move into the recessed portions 29, 29 to the outer periphery of the guide screw 10 to open the locking spring 26'', disconnect the guide screw 10 and the pressure knob 13, and enable the pressure knob 13 to be in a free state. After the pressure cooker is set by fitting the lid body 2 so that the internal pressure is maintained at a predetermined specified value by locking, boiling cooking is performed. After boiling, remove lid 2 from container 1.
When removing the lid body 2, the press-fitting of the lid body 2 is released by using the press-fit pressurization restriction release means c, as described above, and the lid body 2 can be removed.

Next, in the case of the device equipped with the rotation regulating device A shown in FIGS. 8 to 10 of the drawings, cutouts 32, 32 formed in the guide screw tube 10 and notches 33, 33 carved in the pressure knob 13 are used. and pressure knob 1.
3 is fitted with a flat U-shaped locking spring 26, and its end side is engaged with the notches 32, 32 of the guide screw tube 10, and then the pressure knob 13 is turned to remove the locking spring. Guide screw 1 connected by 26
When the lifting rod 9, which has been raised at 0, is locked to the hook-shaped locking parts 7, 7 of the container 1 and a specified locking load is applied to the lifting rod 9, the locking spring 26 engages the notch of the guide screw tube 10. 32, the pressure knob 13 is disengaged from the guide screw 10 and becomes free.
In addition, the lid body 2 is fitted into the container 1 under the pressure regulation by the engagement of the lifting rod 9 with the hook-shaped locking parts 7, 7, and after being set to enable pressure cooking, the lid body 2 is heated. It is used for boiling.

Furthermore, when the lid 2 is to be removed after heating and boiling, the pressure knob 13 is rotated in the opposite direction to engage the locking spring 26 with the notches 32, 32 of the guide screw tube 10. When the press-fit pressure regulation is released,
Lower the guide screw 10 and attach the elevating rod 9 to the hook-shaped locking portion 7,
7 to remove the lid 2.

In addition, as shown in FIG. 9, the notch 3 of the pressure knob 13
3, 33 are filled with elastic materials 34, 34 and a cover ring 35 is provided on the outer periphery, the notch 3
3.33, to prevent clogging with cooking waste, etc.

The appearance should be good. This has the following practical effects.

As described above, in the pressure cooker according to the present invention, the lid is fitted into the opening of the container, and the end is connected to the screw rod protruding from the center of the lid, and the end is connected to the hook-shaped locking portion of the container. A guide screw with a loosely locked lifting rod that is engaged with and press-fits the lid into the container is attached so as to be freely threaded, and the guide screw is operated by a pressure knob equipped with a rotation regulating device to close the lid. It is possible to restrict pressurization by press-fitting into a body container, and the rotation restriction device has a mechanism that, when the internal residual pressure becomes a reduced pressure state due to the operation of the pressure regulating valve, rotates the pressurization knob. Since it is equipped with a means for releasing the pressure-fitting restriction that allows the lid to be removed when the lifting rod is unlocked, by rotating the pressure knob of the lid that is fitted into the opening of the container, When the lifting rod is raised and the left and right ends of the lever are locked into the hook-shaped locking parts protruding from the side wall of the container, and the specified locking load is reached, the rotation restriction device of the pressure knob is activated. When activated, the pressure knob is released, and the lid is fitted to the container at a specified pressure by screwing the guide screw of the pressure knob into the screw, thereby adjusting the internal pressure of the pressure cooker to the desired gauge pressure. (approximately 1.8 to 2.0 Kgf/cm ² ), so if the internal pressure is uncertain like in a conventional pressure cooker, i.e. if the pressure fit of the lid is weak, steam may leak from the opening of the container. On the other hand, if the pressure fit of the lid is strong,
Although there is no steam leakage, there is no tendency for high pressure to occur, and even if the lid is repeatedly press-fitted, the internal pressure can always be set at the specified value, and the pressure knob is similar to the conventional pressure knob. Since the operation is the same as that of the first and second pressure regulating valves provided on the lid, the operation is reliable and simple, and because the lid is press-fitted into the container with a specified pressure, it is even more effective than the first and second pressure regulating valves provided on the lid. It also acts as a safe third pressure regulation mechanism. In other words, when the pressure reaches a specified value or higher, the packing deforms and adjusts the pressure by allowing steam to escape from the fitting part of the lid, preventing cooker explosions caused by ultra-high pressure and greatly improving safety. It exhibits a unique effect that can also improve the performance.

In addition, the present invention provides pressure regulating operation by press-fitting the rotation regulating device in the pressure knob and rotation of the pressure knob when the internal residual pressure becomes a reduced pressure state due to the operation of the pressure regulating valve. It is equipped with a means to release the press-fit pressure regulation, which allows the lid to be removed by releasing the lock from the hook-shaped locking part of the lifting rod, so that the residual pressure inside the pressure cooker is low during use. At this point, even if the lid is removed from the container, there is no risk of burns to hands or fingers due to steam dissipation, and the operation of opening the lid when the pressure is reduced is the same as before, and there is no special process. Since it does not require any operation, it is highly effective as a pressure cooker with good operability and high safety.

In the present invention, although not shown in the drawings, the same operation and effect can be obtained even if the pressure cooker is of a combined lid type or a type in which the end of the lifting rod is locked to the side wall of the container. Of course, it is necessary to demonstrate this.

[Brief explanation of the drawing]

The drawings show an embodiment of the pressure cooker according to the present invention, in which Fig. 1 is a partially longitudinal front view, Fig. 2 is a partially transverse plan view, and Fig. 3 is a partially longitudinal enlarged front view of the main parts. , FIGS. 4 to 6 are partially enlarged vertical front views showing other embodiments of the main parts, and FIG.
FIG. 8 is an enlarged longitudinal sectional front view showing another embodiment of the main part, FIG. 9 is a cross-sectional plan view of the above line, and FIG. 10 is a longitudinal sectional view of the main part of the other embodiment. It is an enlarged front view. In the figure, 1 is the container, 2 is the lid, 5 is the screw rod, 7,
7 is a hook-shaped locking part, 9 is a lifting rod, 10 is a guide screw cylinder, 1
3 is a pressure knob, A is a rotation regulating device, 19 is a first pressure regulating valve, 22 is a second pressure regulating valve, and a, b, and c are release means.

Claims (1)

[Claims] 1 Fit the lid into the opening of the container, engage the screw protruding in the center of the lid, and engage the end with the hook-shaped locking part of the container to press fit the lid into the container. A guide screw with a lifting rod loosely locked is attached so that it can be screwed together freely, and the guide screw is operated by a pressure knob with a rotation regulating device, making it possible to restrict the pressure of the lid body into the container. year,
In addition, the rotation regulating device has a mechanism that prevents the lid body from being removed when the lifting rod is unlocked and released by rotating the pressure knob when the internal residual pressure becomes a reduced pressure state due to the operation of the pressure regulating valve. A pressure cooker characterized in that it is equipped with a means for canceling the pressure regulation of press fitting.