JPH081172B2 - Hand-operated vacuum pump that reduces the pressure inside the container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention provides an optimal container for a vacuum pump used for depressurizing the inside of a storage container for foodstuffs, confectionery or the like, or a production container for instant pickles. The present invention relates to a hand-operated vacuum pump for reducing pressure.

[Problems to be Solved by Prior Art and Invention]

Conventionally, a container with a pump for evacuating the inside of the container is already known.

Such a container with a pump is not used so much because the container becomes large and the price becomes high.

The Applicant found that when food was placed in two small containers and the pressure in one container was reduced, the generation of putrefactive mold was significantly slower and less, and the inside of the small container was easily decompressed. We have developed a decompression container that can be stored in a refrigerator in a refrigerator in such a state that it can store perishable foods for as long as possible, and a decompressed food container that can be instantly pickled quickly. Although a patent application has been filed, at the same time, research into improvement of an inexpensive hand-operated vacuum pump which is excellent and completed the hand-operated vacuum pump for depressurizing the inside of the container of the present invention.

[Means for solving the problem]

 The gist of the present invention will be described with reference to the accompanying drawings.

In a hand-operated vacuum pump a in which a piston rod 2 provided with a handle 1 is reciprocally drawn and pushed with respect to a pump cylinder 3 to suck air from a front end opening 3'of the pump cylinder 3, the front end opening 3 ' A valve seat having a diameter larger than that of the piston rod body 2 is set at the tip of the piston rod body 2 by setting an opening diameter that allows the pump fitting portion 12 protruding from the valve-equipped container b for depressurizing the valve to be fitted and abutted and locked. Four
The valve seat 6 is provided with a valve groove 6 into which the O-ring type ring valve 5 is fitted, and the depth of the valve groove 6 is set in the valve groove 6 when the ring valve 5 is fitted. It is provided so as to project slightly from the peripheral surface of the seat 4 and slide in the pump cylinder 3 in an airtight state, and the width of the valve groove 6 is made slightly wider than that of the ring valve 5 so that the valve seat 4 is pressed when pressed. It is provided so as to form a gap between the inner surface of the tip wall portion 4 ″ and the ring valve 5. The bottom surface of the valve groove 6 inside the ring valve 5 and the base end wall portion 4 ′ of the valve seat 4 are communicated with this gap. The air vent passage 7 through which the air on the front end side of the valve seat 4 is vented to the base end side is provided with a groove of the valve groove 6 from the end wall portion 4 ″ of the valve groove 6 to the base end wall portion 4 ′ of the valve seat 4. Bottom and valve seat 4
Formed on the base end wall portion 4 ′ of the pump cylinder 3 at the base end opening portion 3 ″.
A hand-operated vacuum pump for depressurizing the inside of a container, characterized in that a gap 9 that allows air to be released is formed.

[Action]

 For example, food is put in the container 10 and the lid plate with valve 11 is fitted.

In the pump fitting portion 12 protruding from the valved container b,
For example, in a standing state, the tip opening 3'of the hand-operated vacuum pump a is fitted and abutted, the handle 1 is gripped, and the piston rod 2 is held.
When the piston rod 2 is moved upward, the ring valve 5 is rubbed against the inner peripheral surface of the pump cylinder 3 in the valve groove 6 and slightly displaced downward, so that air flow through the air vent passage 7 At the same time when the ring valve 5 is shut off, the outer periphery of the ring valve 5 is pressed against the inner wall peripheral surface of the pump cylinder 3 to maintain the airtight state with respect to the pump cylinder 3, so that the air in the container 10 is sucked, and when moving downward, the ring valve 5 is reversed. 5 is rubbed against the inner peripheral surface of the pump cylinder 3 in the valve groove 6 oppositely to the above, and slides slightly upward to move the pump cylinder 3
The air inside is brought into a circulation state through the air vent passage 7, and is removed outside the hand-operated vacuum pump a from the gap 9 of the base end opening 3 ″ of the pump barrel 3 sucked into the pump barrel 3.

Thus, once the inside of the valve-equipped container b is depressurized, the container-side opening / closing valve 13 is pressed by the outside air and always maintains a closed state.
The inside of the valved container b is kept at a reduced pressure.

If the valved container a is stored and stored in the refrigerator in this state, it will not rot for a long time.

Also, when pickled vegetables are placed in the valve-equipped container a, the pressure-reducing action allows instant pickling to be completed.

When the container side opening / closing valve 13 is picked up with a fingertip, outside air enters and the lid plate 11 can be removed, and the depressurized state is released.

〔Example〕

On the valve-equipped lid plate 11 of the illustrated valve-equipped container b, an annular flange 15 is provided so as to be in close contact with the inner peripheral surface of the upper edge of the container 10, and the container 10 is placed in an annular groove 16 provided outside the annular flange 15. A case where a packing 17 that abuts on the top surface 10 'of the upper edge of the opening is fitted to maintain air tightness is illustrated.

The container-side open / close valve 13 is a disk that becomes thinner toward the periphery.
A valve rod 19 is vertically provided at the center of the lower surface of the valve 18, a large diameter locking portion 20 is formed at the lower end of the valve rod 19, and the whole is molded with a flexible material to attach a hole 21
The large-diameter locking portion 20 is press-fitted into the container and the container side opening / closing valve 13 is fixed to the lid plate 11.

The ventilation valve hole (14) formed around the mounting hole (21) is provided so as to be closed by the peripheral edge of the disk (18).

In the hand-operated vacuum pump a of FIG. 1, the pump fitting portion 12 is formed in a hemispherical bulging shape so that the hand-operated vacuum pump a can be operated from any angle in an inclined state. In the figure, reference numeral 23 is an air vent hole, 24 is a concave portion, 25 is a pickle, 26 is a lid, 27 is a handle screwing portion, 28 is a cushion packing ring, 22 is light weight and material saving. The lightening hole is formed to have a cylindrical lower wall.

In the air vent passage 7 of this embodiment, one portion of the base end wall portion 4'of the valve seat 4 is notched and opened to the groove bottom depth, and the valve groove 6
An air vent groove 8 is provided on the bottom surface of the groove, which is connected to the notched base end wall portion 4 ', and a groove bottom surface of the valve groove 6 extending from the base end wall portion 4'to about the front end wall portion 4 "is formed as a recess. Then, when the ring valve 5 moves upward when the piston rod 2 is pushed, the first end of the air vent groove 8 close to the tip wall portion 4 ″ opens, and the base end wall portion 4 ′ is passed through the bottom of the ring valve 5. The air vent passage 7 passing through is configured to be in an open state.

〔The invention's effect〕

Since the present invention is configured as described above, it has the following features as compared with the conventional hand-operated vacuum pump.

(1) In the conventional hand-operated vacuum pump, the piston rod is a tubular body, and air in the container with a valve that is going to be decompressed into the piston rod is sucked through a valve mechanism provided at the lower part of the body to make the piston rod An air vent hole is provided at the top of the to vent to the outside.

When such a hand-operated vacuum pump erroneously sucks water, the water is sucked into the piston rod body, which has a drawback that the sucked water falls forever.

This means that dirt is also sucked in, and a foul odor remains and remains, which makes cleaning it difficult.

In this respect, the hand-operated vacuum pump of the present invention does not suck water or dirt into the piston rod body.

(2) Also in the conventional hand-operated vacuum pump, a ring packing (O-ring) is fitted on the outer periphery of the piston rod body to preserve the airtight division state and perform the pumping action.

In addition, a valve mechanism is provided on the tip wall of the piston rod.

In this respect, according to the present invention, the ring packing (O-ring) also serves as the valve mechanism, and since a valve mechanism member separately provided in addition to the ring packing is not required, the manufacturing cost can be reduced accordingly.

In addition, the valve mechanism is fulfilled only by the vertical movement of the ring valve, which also functions as the ring packing, and the suction air is smoothly discharged from the entire circumference of the gap at the base end opening of the pump cylinder to the outside of the pump. Since the air vent hole provided in the upper portion of the piston rod body is not necessary, the downward movement of the upper piston rod body becomes extremely light.

Moreover, the present invention has a configuration in which the air vent passage is simply communicated through the groove bottom surface portion of the valve groove on the lower side of the ring valve and is communicated via the opening passage of the base end wall portion of the valve seat. The base end wall of the molded valve seat is cut open to the depth of the groove bottom of the valve groove, and a predetermined range on the bottom surface of the valve groove is recessed so as to be connected to this cutout opening to form an air vent groove. The configuration is extremely simple to manufacture, has excellent mass productivity, and is highly practical with high air bleeding accuracy and smooth movement.

(3) A small valved container with a compact design that stores foods, pickles, and other items to be stored, and a hand-operated vacuum pump is applied to the pump fitting part of the cover plate to move the handle up and down. It will be possible to easily depressurize the inside of the valved container, and since this small valved container holds the depressurized state as it is, it can be kept in the refrigerator for a long time and the food can be kept for a long time. If the valved container is used as it is as a container for producing instant pickles, the instant pickles can be easily produced by depressurization.

[Brief description of drawings]

The drawings show one embodiment of the present invention. FIG. 1 is a front view showing a normal state of use of the hand-operated vacuum pump of the present invention, and FIG. 2 is a sectional view of the hand-operated vacuum pump of the present invention. 3 and 4 are explanatory views showing the operation of the valve mechanism of the main part, and FIG. 5 is a partially cutaway front view showing another example of a hand-operated vacuum pump according to the applicant's prior application. a ... Hand-operated vacuum pump, b ... Valve container, 1 ... Handle, 2 ... Piston rod, 3 ... Pump cylinder, 3 '...
Tip opening, 3 "... Base opening, 4 ... Valve seat, 4 '...
… Base wall, 4 ″ …… Tip wall, 5 …… Ring valve, 6…
… Valve groove, 7 …… Air vent, 9 …… Gap, 12 …… Pump fitting part.

Claims (1)

[Claims] 1. A hand-operated vacuum pump in which a piston rod provided with a handle is pushed back and forth with respect to a pump cylinder to suck air from a front end opening of the pump cylinder, and a valve for decompressing the front end opening. A valve seat having a diameter larger than that of the piston rod is provided at the tip of the piston rod, and the valve seat is set to O A valve groove for fitting a ring type ring valve is provided, and when the depth of the valve groove is fitted into the valve groove, the ring valve protrudes slightly from the peripheral surface of the valve seat and the pump cylinder is airtight. The valve groove is made slightly wider than the ring valve so that a gap is formed between the inner surface of the tip wall portion of the valve seat and the ring valve when pressed. It communicates with this gap and passes through the bottom of the valve groove inside the ring valve and the base end wall of the valve seat, and An air vent passage for venting air to the base end side is formed in the groove bottom surface of the valve groove from the valve wall near the tip end wall portion to the base end wall portion of the valve seat and in the base end wall portion of the valve seat. A hand-operated vacuum pump for decompressing the inside of a container, characterized in that a gap that allows air to be released is formed at an end opening.