KR20100119355A - Vinyl bag with sticker type check valve - Google Patents

Abstract

PURPOSE: A sticker type check valve can be used several times as closing the penetration hole of the vinyl envelop by enabling a check valve to be elastically transformed not miniature transformed. CONSTITUTION: A vinyl envelop which a sticker type check valve is mounted comprised of a envelop(100), a check valve, a base(400), and a adhesive sheet(450). The vinyl envelop has a opening on one side and has a penetration hole on the upper side. The check valve is combined by adhesive on the upper side of the vinyl envelop and opens and closes the penetration hole. The check valve is comprised of cover member(210), and a opening member(220). The cover member is comprised of the thin synthetic resin film and is attached to the upper side of the vinyl envelope, and forms the pressurized bending unit(211) projected convexly as a dome shape to the opposite direction of the vinyl envelope.

Description

Plastic bag with sticker check valve {VINYL BAG WITH STICKER TYPE CHECK VALVE}

The present invention relates to a plastic bag equipped with a check valve, and in particular, to put food and the like inside to discharge the air inside the plastic bag to the outside through the check valve to seal the inside of the plastic bag in a vacuum state to ensure safe storage It relates to a plastic bag equipped with a sticker check valve.

1 is a perspective view of a plastic bag equipped with a conventional check valve, Figure 2 is a cross-sectional view of the main portion of the check valve is mounted in Figure 1, Figure 3 is a check valve is pressed in Figure 2 to close the through hole of the plastic bag It is sectional view of one state.

As shown in Figures 1 to 3, the plastic bag is equipped with a conventional check valve, it consists of a plastic bag 10 and the check valve 20.

A through hole 16 is formed on the top surface of the plastic bag 10, and the check valve 20 is attached to the adhesive sheet 28 on the top of the through hole 16 on the top surface of the plastic bag 10. Are combined by.

The check valve 20 has a dome-shaped protrusion 30 formed therein, and a through hole closed adhesive member 26 for closing the through hole 16 is mounted at the inner center portion of the protrusion 30. A plurality of discharge holes 24 are formed around the protrusion 30.

Therefore, as shown in FIG. 2, the air inside the plastic bag 10 moves through the through hole 16 to the inside of the protruding portion 30, which, in turn, moves to the outside through the discharge hole 24. Discharged.

And, in order to seal the plastic bag 10, as shown in Figure 3 by pressing the protrusion 30 in the direction of the plastic bag 10 using a press or the like, the through-opening closed adhesive member Allow 26 to close the through hole 16.

However, the conventional check valve 20 can be used only once because the press portion 30 is plastically deformed and pressed to the plastic bag 10 by using a press or the like.

That is, although it may be deformed from FIG. 2 to FIG. 3, the protrusion 30 may not be deformed back to FIG. 2 from plastic deformation.

Therefore, there is a disadvantage that the check valve 20 cannot be used repeatedly.

In addition, as shown in FIG. 3, when the protrusion 30 is pressurized to allow the through hole closure member 26 to close the through hole 16, the through hole closure member 26 may be formed. A gap is generated between the top surfaces of the plastic bags 10 so that external air may be introduced into the plastic bags 10.

At this time, an adhesive is applied to the lower portion of the through-opening closing member 26 so that the upper surface of the plastic bag 10 may be adhered well.

However, in this case, if the liquid is accommodated in the plastic bag 10, the liquid penetrates between the lower surface of the through-opening closure member 26 and the upper surface of the plastic bag 10, the through-open closure adhesive The adhesion efficiency of the adhesive for bonding the member 26 and the upper surface of the plastic bag 10 is reduced.

As a result, the through hole closed adhesive member 26 may be separated from the top surface of the plastic bag 10, and thus, external air may be introduced into the plastic bag 10.

In addition, as shown in FIG. 3, in the state where the through hole closure adhesive member 26 closes the through hole 16, the discharge hole 24 and the through hole 16 are closed through the through hole closure. Since only the adhesive surface between the upper surface of the adhesive member 26 and the upper surface of the plastic bag 10 is mutually blocked, the sealing efficiency of the plastic bag 10 is not excellent.

In addition, in the conventional check valve 20 shown in FIGS. 1 to 3, the through-hole closing adhesive member 26 is pressed by a press or the like after the inside of the plastic bag 10 is vacuumed, and thus the through-hole 16 ) Is closed, so that after the completion of the vacuum operation in the open space, the air may flow into the plastic bag 10 through the through hole 16 through the discharge hole 24 between the pressurization operations by a press or the like. There is a problem.

In addition, since the zipper is formed in the opening of the plastic bag, the unit price of the plastic bag is increased, manufacturing is not easy, there is a problem that can not seal the opening of the plastic bag if the zipper is bad.

The present invention can be used many times by closing the through-holes of the plastic bag is not deformed and the elastic deformation of the check valve, double sealing the plastic bag can increase the sealing efficiency of the plastic bag, vacuum operation inside the plastic bag At the same time, the closing operation of the through-holes can be made, and the object of the present invention is to provide a plastic bag equipped with a sticker check valve that can easily seal the opening of the plastic bag not formed with a zipper.

In order to achieve the above object, a plastic bag equipped with a sticker check valve of the present invention includes: a plastic bag having an opening formed at one side thereof and a through hole formed at an upper surface thereof; A check valve coupled to an upper surface of the plastic bag to open and close the through hole; A base extending from the check valve and made of a bendable material; One side is fixedly adhered to the bottom of the base, the other side is made of an adhesive sheet attached to the plastic bag, the check valve is attached to the upper surface of the plastic bag, protruding convexly in the opposite direction of the plastic bag A cover member having an elastically deformable pressurized bending part and having a first discharge hole communicating with the through hole at the center of the pressurized bending part; It is made of an elastic material disposed between the upper surface of the plastic bag and the cover member from the inside of the pressure bending portion, and consists of an opening and closing member for opening and closing between the through hole and the first discharge hole, the vacuum opening and closing member is vacuum pressure The plastic bag is in close contact with the upper surface of the plastic bag to close the through hole, and the pressure bending part is bent downward in the direction of the opening and closing member by external force to fix the opening and closing member to the upper surface of the plastic bag, and to bend downward. The pressurized bending part is bent upward in the opposite direction of the opening and closing member by an external force and elastically deformed to its original state, and the adhesive sheet is folded on the upper and lower surfaces of one side of the plastic bag in a state of folding the opening formed on one side of the plastic bag. Bonded to seal the opening.

The first discharge hole is in close contact with the opening and closing member when the pressure bending portion is bent downward.

The opening and closing member is formed with a second discharge hole for communicating the through hole and the first discharge hole, the second discharge hole and the through hole is arranged to be eccentric with each other in the up and down direction, the second discharge hole than the first discharge hole Small and disposed inside the first discharge hole, the first discharge hole and the through hole are spaced apart from each other without generating an intersection, and the pressure bending portion is bent downward so that the outer peripheral portion of the first discharge hole is discharged from the second discharge hole. The circumference of the ball is pressed to block the second discharge hole and the through hole, and the first discharge hole is pressurized by the opening / closing member to be closed.

A bending groove is formed around the first discharge hole in the pressure bending part, and an upper part of the pressure bending part in which the first discharge hole is formed is bent downward based on the bending groove to press the opening member.

The second discharge hole is formed by cutting the opening and closing member so that the cutting surfaces are in contact with each other in the free state, the second discharge hole, the cutting surface of the opening and closing member is closed in contact with each other in the free state, the external force The cutting surface of the opening and closing member is bent and opened.

The second discharge hole has a '+' shape.

The opening and closing member is formed in a dome shape, the second discharge hole is formed in the center, and the lower surface of the outer circumferential portion is in contact with the upper surface of the plastic bag.

In addition, the opening and closing member is disposed to be movable in the vertical direction between the upper surface of the plastic bag and the cover member, the inner surface of the pressing bent portion is formed with embossing.

A bending groove is formed around the first discharge hole in the pressure bending part, and an upper part of the pressure bending part in which the first discharge hole is formed is bent downward based on the bending groove to press the opening member.

According to the plastic bag equipped with the check valve of the present invention as described above, since the cover member is elastically deformed to press the opening and closing member to close the through hole of the plastic bag, without a separate press device as in the prior art User can lock or release by hand, so the check valve can be used several times with simple structure.

In addition, since the adhesive sheet is bonded to the upper and lower surfaces of one side of the plastic bag to seal the opening in a state where the opening formed on one side of the plastic bag is folded, the opening of the general plastic bag without a zipper is also easily formed. It can be sealed.

In addition, since the first discharge hole and the through hole are both in close contact with the opening and closing member, the sealing efficiency of the plastic bag can be increased.

In addition, since the pressurized bending portion depresses the opening and closing member, the opening and closing member may be prevented from flowing.

In addition, since the cut surface of the second discharge hole is cut in contact with each other in a free state, when the opening and closing member is in close contact with the plastic bag to close the opening and closing member, inflow of air through the second discharge hole is caused. Can be further blocked.

In addition, the opening and closing member is formed in a dome shape, it is in close contact with the upper surface of the plastic bag like a rubber adsorption plate to close the through hole more strongly, while the vacuum operation inside the plastic bag is made at the same time the closing operation of the through hole This can be done.

First embodiment

Figure 4 is a perspective view of a plastic bag equipped with a check valve according to a first embodiment of the present invention, Figure 5 is a plan view of a plastic bag equipped with a check valve according to a first embodiment of the present invention, Figure 6 4 is an exploded perspective view of a plastic bag equipped with a check valve according to a first embodiment of the present invention, FIG. 7 is a cross-sectional view taken along line AA of FIG. 4, and FIG. 8 is a vacuum operation by connecting a socket connected to a vacuum pump in FIG. 9 is a cross-sectional view of a state in which the socket is removed after the vacuum is completed in FIG. 8, and FIG. 10 is a cross-sectional view of a state in which the check valve is locked by pressing the cover member in FIG. 9.

As shown in Figure 4 to 10, the plastic bag is equipped with a sticker check valve of the present invention, the plastic bag 100, the check valve 200, the base 400, the adhesive sheet 450 Is made of.

The plastic bag 100 has an opening 120 formed at one side thereof, and a through hole 110 is formed at an upper surface thereof.

And, although not shown inside, the embossing is formed to facilitate the flow of air.

The check valve 200 is coupled to the upper surface of the plastic bag 100 by an adhesive or the like to open and close the through hole 110, and consists of a cover member 210 and the opening and closing member 220.

In this embodiment, as described later, the adhesive sheet 450 attached to the lower portion of the base 400 is extended to the lower portion of the check valve 200.

The cover member 210 is made of a thin synthetic resin film having an elastic force, attached to the upper surface of the plastic bag 100, the pressure convex protruding convexly in the dome (dome) shape in the opposite direction of the plastic bag (100). The bending part 211 is formed.

In addition, a first discharge hole 212 communicating with the through hole 110 is formed at the center of the pressure bending part 211.

As described below, the pressure bending part 211 may be bent and elastically deformed in an up and down direction by an external force.

The pressure bending part 211 is bent downward in the direction of the opening and closing member 220 by an external force, thereby pressing and closing the opening and closing member 220 to the upper surface of the plastic bag 100, thereby acting as follows.

First, the first discharge hole 212 is closed in close contact with the opening and closing member 220, and second, a second formed in the opening and closing member 220 to be described later the outer peripheral portion of the first discharge hole 212 By pressing the circumference of the discharge hole 222, the second discharge hole 222 is further blocked from communicating with the through hole 110, and because the third pressing the pressing member 220 to open and close the opening and closing member 220 ) Can be prevented.

In addition, the pressure bending portion 211 is bent upward in the opposite direction of the opening and closing member 220 by the external force in the downward bent state is elastically deformed to the original state.

The pressure bending part 211 is bent around the spaced apart at a predetermined interval from the first discharge hole 212 in order to be easily elastically deformed downward or upward The groove 213 is formed.

Therefore, the pressure bending part 211 in which the first discharge hole 212 is formed is bent downward and upward based on the bending groove 213 to press or release the opening / closing member 220.

The opening and closing member 220 is made of an elastic material such as silicon is disposed between the upper surface of the plastic bag 100 and the cover member 210 inside the pressure bending portion 211, the through hole 110 And a second discharge hole 222 communicating with the first discharge hole 212 is formed.

The opening and closing member 220 may be formed in a dome shape or a flat plate shape in which the central portion protrudes convexly in an opposite direction of the plastic bag 100.

Preferably, as in the present embodiment, the opening and closing member 220 is formed in a dome shape, the lower surface of the outer peripheral portion in a free state to be in contact with the upper surface of the plastic bag (100).

As shown in FIG. 5 or 7, the first discharge hole 212 and the second discharge hole 222 are disposed at the same position in the center in the vertical direction, and the first discharge hole 212 and the first discharge hole 212. The two discharge holes 222 and the through holes 110 are arranged to be eccentric with each other in the vertical direction.

The second discharge hole 222 is formed smaller than the first discharge hole 212 so that the second discharge hole 222 is disposed inside the first discharge hole 212.

That is, the first discharge hole 212 and the second discharge hole 222 is the intersection with each other, the first discharge hole 212 and the second discharge hole 222 and the through hole 110 are mutually Intersections are spaced apart without occurrence.

The pressure bending part 211 is bent downward so that the outer circumferential portion of the first discharge hole 212 presses the circumference of the second discharge hole 222 so that the second discharge hole 222 and the through hole 110 are formed. ) And the first discharge hole 212 is sealed by pressing an upper part of the opening / closing member 220 to seal the plastic bag 100.

At this time, the pressure bending portion 211 is bent downward to press the plastic bag 100 as well as the opening and closing member 220, the opposite surface of the upper surface of the plastic bag 100 as shown in FIG. It is preferable to pressurize such that the lower surface protrudes in the opposite direction of the check valve 200.

The second discharge hole 222 may be formed in an open hole shape at all times, but is formed by cutting the opening and closing member 220 so that the cutting surface is in contact with each other in a free state.

To this end, in the present embodiment, the second discharge hole 222 is formed in a '+' shape.

Unlike the present embodiment, the second discharge hole 222 may be formed in a '-' shape.

The second discharge hole 222 is closed in contact with the cutting surface of the opening and closing member 220 in a free state, the cutting surface of the opening and closing member 220 is bent open by an external force.

The base 400 extends in the direction of the opening 120 of the plastic bag from the check valve.

In detail, the base 400 protrudes from the lower portion of the cover member toward the opening portion 120 of the plastic bag.

The base 400 is made of a bendable material.

The adhesive sheet 450 has one surface fixedly bonded to the bottom surface of the base 400 and the other surface is attached to the plastic bag 100.

The adhesive sheet 450 is made of a material that can be repeatedly detached to the plastic bag 100.

In this embodiment, the adhesive sheet 450 extends to the bottom of the cover member 210 as well as the bottom of the base 400.

In this case, holes are formed in the adhesive sheet 450 so that the lower portion of the cover member 210 is opened.

The base 400 and the adhesive sheet 450 as described above is the adhesive sheet 450 is bonded to the upper and lower surfaces of one side of the plastic bag in the folded state formed in one side of the plastic bag and the opening It serves to seal the 120.

Because of this, it is not necessary to form a zipper in the opening 120 of the plastic bag can reduce the cost.

Hereinafter, the operating method of the present invention having the above-described configuration will be described.

The state of the check valve 200 in the state of storing the food and the like of the plastic bag 100 is as shown in FIG.

That is, in this state, the lower surface of the outer periphery of the opening and closing member 220 having a central portion protruding upwards is in contact with the upper surface of the plastic bag 100 by gravity, and the opening and closing member 220 penetrates the through. Located on top of the ball 110.

In this case, the second discharge hole 222 maintains a closed state because the incision surfaces are in contact with each other, and the second discharge hole 222 and the through hole 110 are in mutually eccentric positions.

That is, the second discharge hole 222 is located at the center, and the through hole 110 is located at the side eccentric from the second discharge hole 222.

The check valve 200 may be directly attached to the upper surface of the plastic bag 100 by the user, or the check valve 200 may be attached to the upper surface of the plastic bag 100 from the beginning.

In this state, the opening 120 of the plastic bag is sealed.

The opening 120 of the plastic bag is a method of sealing, while the adhesive sheet 450 wraps the upper and lower surfaces of one side of the plastic bag in a state of folding the opening 120 formed on one side of the plastic bag several times. The opening 120 is sealed by adhesion.

When the opening 120 of the plastic bag is sealed, as shown in FIG. 8 to vacuum the inside of the plastic bag 100, an external vacuum pump (not shown) and a socket 300 connected through a hose or the like. ) Is disposed on an upper surface of the check valve 200.

At this time, the socket 300 to surround the first discharge hole (212) and the second discharge hole (222).

When the vacuum pump is operated, as shown in FIG. 8, the second discharge hole 222 is bent upwardly by the suction surface of the second discharge hole 222 and the second discharge hole 222 is opened by the suction force of the vacuum pump.

Therefore, the air inside the plastic bag 100 is introduced into the lower portion of the opening and closing member 220 through the through hole 110, which passes through the second discharge hole 222 and the first discharge hole 212. After moving to the socket 300, which is discharged to the outside via a vacuum pump again.

In this case, as the air inside the plastic bag 100 is discharged, the opening and closing member 220 made of an elastic material gradually descends toward the plastic bag 100 to gradually close the through-hole 110. .

When the inside of the plastic bag 100 is vacuumed and the socket 300 is separated from the check valve 200, as shown in FIG. 9, the entire lower surface of the opening and closing member 220 is opened by a vacuum pressure. Is completely in contact with the upper surface of the plastic bag 100, such as a rubber adsorption plate to close the through hole 110.

That is, since the opening and closing member 220 is lowered while the vacuum operation inside the plastic bag 100 is performed, the closing operation of the through hole 110 is performed at the same time as the vacuum operation of the plastic bag 100 is finished. .

In addition, the second discharge hole 222 is bent in the upward direction is moved to the original position by the elastic restoring force and the vacuum pressure, the cut surface forming the second discharge hole 222 is in contact with each other closed state do.

In this state, the through hole 110 is primarily blocked from the outside by a contact surface between the lower surface of the opening and closing member 220 and the upper surface of the plastic bag 100.

Thereafter, as illustrated in FIG. 10, the user presses the pressure bending part 211 downward to bend.

At this time, the upper portion of the pressure bending portion 211 is bent while elastically deformed in the direction of the opening and closing member 220 on the basis of the bending groove 213.

The outer circumferential portion of the first discharge hole 212 is in close contact with the upper surface of the opening / closing member 220 by wrapping the pressure bending part 211 while surrounding the second discharge hole 222.

As described above, the outer peripheral portion of the first discharge hole 212 is in close contact with the upper surface of the opening and closing member 220, the first discharge hole 212 is closed by the opening and closing member 220.

And, by the pressure bending portion 211 bent downward, the second discharge hole 222 is further pressed in the direction of the plastic bag 100 is further blocked the connection with the through hole 110, the The opening and closing member 220 is fixed without being flown.

In addition, since the pressure bending part 211 presses not only the opening and closing member 220 but also the plastic bag 100 to protrude in the opposite direction of the check valve 200, the opening and closing member 220 is pressed on the vinyl. By strongly adhering to the bag 100, the opening and closing member 220 may be spaced apart from the plastic bag 100 to prevent the through hole 110 from being opened.

The first discharge hole 212 is in close contact with the upper surface of the opening and closing member 220, the outside air is directly introduced into the pressure bending portion 211 through the first discharge hole (212). You can block.

And, the air that can be introduced from the outside through the cut surface of the second discharge hole 222, the bottom surface of the opening and closing member 220 made of a dome shape is the upper surface of the plastic bag 100, such as a rubber adsorption plate Since the outer peripheral portion of the first discharge hole 212 is pressed against the circumference of the second discharge hole 222, the inflow becomes more difficult.

In addition, the opening and closing member 220 is formed in a dome shape in the opposite direction of the plastic bag 100 in a free state, and prevents the phenomenon that the outer peripheral portion of the opening and closing member 220 is lifted from the plastic bag 100. can do.

As described above, the bent check valve 200 of the present invention, the opening and closing member 220 closes the through hole 110 by a vacuum pressure, and the opening and closing member (2) by the pressure bending portion 211 ( The plastic bag 100 may be strongly adhered to the plastic bag 100 to close the through-hole 110 so that the plastic bag 100 may be strongly sealed in double.

On the other hand, in order to return the pressure bending portion 211 bent downward, the user presses the pressure bending portion 211 upward.

Then, the pressure bending part 211 is elastically deformed based on the bending groove 213 to be deformed to its original state.

As a result, the first discharge hole 212 is spaced apart from the opening and closing member 220 so that external air may flow into the cover member 210 through the first discharge hole 212.

Of course, even in this state, the opening and closing member 220 is in close contact with the upper surface of the plastic bag 100 to close the through hole 110, the outside air does not flow into the interior of the plastic bag 100. Does not.

The release of the vacuum is performed by opening the opening 120 formed at one side of the plastic bag 100.

This separates the base 400 and the adhesive sheet 450 from the plastic bag, and by unfolding one side of the plastic bag folded several times, the opening 120 can be opened.

When opening the opening 120 of the plastic bag 100 to release the vacuum, external air is introduced into the plastic bag 100, which is again through the through hole 110 through the opening and closing member 220 And flows between the top surface of the plastic bag 100.

Therefore, the opening and closing member 220 of the dome shape is deformed to maintain the state as shown in FIG.

Second embodiment

11 is a cross-sectional view according to a second embodiment of the present invention, FIG. 12 is a cross-sectional view of a state in which a vacuum operation is performed by connecting a socket connected to a vacuum pump to FIG. 11, and FIG. FIG. 14 is a cross-sectional view of the state in which the check valve is locked by pressing the cover member in FIG. 13.

The second embodiment has a difference between the cover member 210 and the opening and closing member 220 compared to the first embodiment, which will be described with reference to this.

As shown in Figure 11 to Figure 14, the plastic bag is equipped with a sticker check valve of the present invention, the plastic bag 100, and the check valve 200.

The plastic bag 100 is the same as the first embodiment, a detailed description thereof will be omitted.

The check valve 200 is coupled to the upper surface of the plastic bag 100 by an adhesive sheet or an adhesive to open and close the through hole 110, the cover member 210 and the opening and closing member 220 Is done.

The press member 211 and the first discharge hole 212 are formed in the cover member 210 as in the first embodiment.

In addition, an embossing 215 is formed on an inner surface of the pressure bending part 211, and a bending groove 213 for bending is formed.

The embossing 215 may form a flow path of air when the opening and closing member 220 contacts the inner surface of the pressure bending part 211.

The opening and closing member 220 is disposed between the upper surface of the plastic bag 100 and the cover member 210, unlike the first embodiment is not formed with a second discharge hole.

The opening and closing member 220 is disposed to be movable in the vertical direction between the upper surface of the plastic bag 100 and the cover member 210.

The opening and closing member 220 may be formed in a flat plate shape, or may be formed in a dome shape as in the present embodiment.

As shown in FIG. 11, when the opening and closing member 220 covers the through hole 110, the socket 300 connected to the vacuum pump is disposed on the check valve 200, and the vacuum pump is operated. By the suction force of the vacuum pump, the opening and closing member 220 rises as shown in FIG. 12.

The through hole 110 is opened by the opening and closing member 220 to communicate with the first discharge hole 212.

In this case, the embossing 215 is formed on the inner surface of the pressure bending part 211, and the air introduced into the cover member 210 through the through hole 110 is embossed 215. ) Is moved to the first discharge hole 212 through the flow path formed between the, it is discharged to the outside via the socket 300 and the vacuum pump again.

When the vacuum of the plastic bag 100 is completed and the socket 300 is separated from the check valve 200, as shown in FIG. 13, the opening / closing member 220 is lowered by the vacuum pressure to lower the plastic bag. It is in close contact with the upper surface of (100).

As a result, the through hole 110 is closed by the opening and closing member 220.

Thereafter, as shown in FIG. 14, the pressure bending part 211 is bent downward to allow the outer circumferential portion of the first discharge hole 212 to press the opening / closing member 220.

Thus, the flow of the opening and closing member 220 is prevented, the first discharge hole 212 is in close contact with the upper surface of the opening and closing member 220 is closed, the through hole 110 is the opening and closing member 220 Close to the bottom of the

Other configurations, structures, and operation methods are the same as in the first embodiment, and a detailed description thereof will be omitted.

The plastic bag equipped with a sticker check valve of the present invention is not limited to the above-described embodiment, and may be variously modified and implemented within the allowable technical spirit of the present invention.

1 is a perspective view of a plastic bag equipped with a conventional check valve,

Figure 2 is a cross-sectional view of the main portion of the check valve is mounted in Figure 1,

3 is a cross-sectional view of a state in which the check valve is pressed in FIG. 2 to close the through hole of the plastic bag;

4 is a perspective view of a plastic bag equipped with a check valve according to the first embodiment of the present invention;

5 is a plan view of a plastic bag equipped with a check valve according to a first embodiment of the present invention;

6 is an exploded perspective view of a plastic bag equipped with a check valve according to a first embodiment of the present invention;

FIG. 7 is a cross-sectional view taken along line A-A of FIG. 4;

8 is a cross-sectional view of a state in which a vacuum operation is performed by connecting a socket connected to a vacuum pump in FIG. 7;

9 is a cross-sectional view of the socket after removing the vacuum in Figure 8,

10 is a cross-sectional view of the check valve is locked by pressing the cover member in FIG.

11 is a cross-sectional view according to a second embodiment of the present invention;

12 is a cross-sectional view of a state in which a vacuum operation is performed by connecting a socket connected to a vacuum pump in FIG.

Figure 13 is a cross-sectional view of the socket is removed after completion of the vacuum in Figure 12,

14 is a cross-sectional view of a state in which the check valve is locked by pressing the cover member in FIG. 13;

<Description of the symbols for the main parts of the drawings>

100: plastic bag, 110: through hole, 120: opening, 200: check valve, 210: cover member, 211: pressurized bending part, 212: first discharge hole, 213: bending groove, 215: embossing, 220: opening member 222: second outlet, 300: socket, 400: base, 450: adhesive sheet.

Claims (8)

A plastic bag having an opening formed at one side and a through hole formed at an upper surface thereof; A check valve coupled to an upper surface of the plastic bag to open and close the through hole; A base extending from the check valve and made of a bendable material; One side is fixedly bonded to the bottom of the base, the other side is made of an adhesive sheet attached to the plastic bag, The check valve, A cover member attached to an upper surface of the plastic bag and protruding convexly in an opposite direction of the plastic bag to form an elastic bending member, and a cover member having a first discharge hole communicating with the through hole at the center of the pressure bending part; It is made of an elastic material disposed between the upper surface of the plastic bag and the cover member from the inside of the pressure bending portion, and made of an opening and closing member for opening and closing between the through hole and the first discharge hole, When the vacuum is completed, the opening and closing member is in close contact with the upper surface of the plastic bag by the vacuum pressure to close the through hole, The pressure bending part is bent downward in the direction of the opening and closing member by an external force to fix the opening and closing member to the upper surface of the plastic bag by pressing closely, The downward bending the bending portion is bent upward in the opposite direction of the opening and closing member by an external force to elastically deformed to its original state, The adhesive sheet is attached to the upper and lower surfaces of the one side of the plastic bag in the folded state formed on one side of the plastic bag is a plastic bag with a sticker type check valve, characterized in that for sealing the opening. The method of claim 1, The plastic bag with a sticker type check valve, characterized in that the first discharge hole is closed in close contact with the opening and closing member when the pressure bending portion is bent downward. 3. The method of claim 2, The opening and closing member is formed with a second discharge hole for communicating the through hole and the first discharge hole, The second discharge hole and the through hole are arranged to be eccentric with each other in the vertical direction, The second discharge hole is smaller than the first discharge hole and disposed inside the first discharge hole, The first discharge hole and the through hole are spaced apart from each other without generating an intersection, The pressure bending part is bent downward so that the outer circumference of the first discharge hole pressurizes the circumference of the second discharge hole to block the second discharge hole and the through hole, and the first discharge hole is pressurized by the opening / closing member to be closed. Plastic bag is equipped with a sticker type check valve characterized in that it is. 3. The method of claim 2, The pressure bending portion is formed with a bent groove around the first discharge hole, The upper portion of the pressurized bending portion formed with the first discharge hole is bent downward based on the bending grooves, the plastic bag with a sticker type check valve, characterized in that for pressing the opening and closing member. 5. The method according to any one of claims 1 to 4, The second discharge hole is formed by cutting the opening and closing member to be in contact with each other in the free state, The second discharge hole is a plastic bag with a sticker type check valve, characterized in that the incision surface of the opening and closing member is closed in contact with each other in the free state, the incision surface of the opening and closing member is bent open by an external force. 5. The method according to any one of claims 1 to 4, The opening and closing member is made of a dome (dome) shape, the second discharge hole is formed in the center, the plastic bag with a sticker type check valve, characterized in that the lower surface of the outer peripheral portion in contact with the upper surface of the plastic bag. The method according to claim 1 or 2, The opening and closing member is disposed to be movable in the vertical direction between the upper surface of the plastic bag and the cover member, The inner side of the pressurized bending portion is a plastic bag with a sticker type check valve, characterized in that the embossing is formed. The method of claim 7, wherein The pressure bending portion is formed with a bent groove around the first discharge hole, The upper portion of the pressurized bending portion formed with the first discharge hole is bent downward based on the bending grooves, the plastic bag with a sticker type check valve, characterized in that for pressing the opening and closing member.

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