JP2007032723A - Check valve, adapter and compression bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a check valve which can easily release air, and has an excellent non-return effect and simple structure. <P>SOLUTION: The check valve permits air to discharge outside, while prevents air from entering inside. The check valve is provided with a base plate 2 having a valve port 1, and a rubber valve 3 attached to the base plate 2 to cover the valve port 1 having a seal surface 3c at the periphery 3a formed in a thin-walled shape. While the base plate 2 is attached to the periphery of a valve opening 5 corresponding to the valve port 1 formed in a sealable bag body 4. a periphery 5a of the valve opening 5 of the bag body 4 is disposed between the seal surface 3c of the rubber valve 3 and the base plate 2, and the seal surface 3c is brought in close contacte with the periphery 5a of the valve opening 5 of the bag body 4, so that air can be prevented from entering inside the bag body 4 from outside. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a simple check valve attached to a bag for storing clothes, bedding, and the like, an adapter for connecting a vacuum cleaner to the check valve, and a compression bag including the check valve.

  When storing clothes, bedding, etc. in a closet or a chiffon, a compression bag is often used in which the volume of the inside is reduced to reduce the volume and maintain a compact compressed state. Such a compression bag also has a great advantage that the distribution cost can be reduced because more clothes, bedding, etc. can be stored, transported and stored in a compactly compressed state even in the distribution process. For example, a compression bag has been proposed in which a suction nozzle of a vacuum cleaner is pressed against an exhaust valve (check valve) provided in the bag body so that the air inside can be sucked (see, for example, Patent Document 1).

  For example, the exhaust valve may be formed by forming a top surface of a lid body having a suction hole communicating with the suction nozzle in a dome shape so that the suction nozzle is brought into contact with the lid body in an inclined state as well as a vertical state. A lock mechanism is provided for allowing deaeration and for maintaining the deaeration state. The locking mechanism is configured to press the valve plate against the exhaust hole by rotating the lid in one direction to close the valve, and to press the valve plate against the exhaust hole by rotating the lid in the other direction. It is comprised so that it may cancel | release and it may be set as a valve opening state.

  On the other hand, compression bags used for carrying clothes and personal belongings together during camping, mountain climbing, traveling, etc. can be compressed more easily without using a vacuum cleaner, and are troublesome. It is desirable to be able to maintain the compressed state without requiring a special locking operation. Therefore, for example, a simple compression bag as shown in FIG. 10 is commercially available. In this example, both side portions 21a and 21a of the two-layered synthetic resin sheets 21 and 21 are welded, and the opening 22 is provided with a chuck 22 composed of a convex portion and a concave portion that can be sealed in an airtight state. An exhaust valve 23 is formed at the bottom.

  The exhaust valve 23 has two welded portions 23a and 23b arranged in parallel in the vicinity of the bottom side with a predetermined interval, between one welded portion 23a and one side portion 21a, and the other welded portion 23b. And the other side portion 21a are formed with non-welded portions 23c and 23d, respectively, and allow air to be discharged in the direction indicated by the dashed arrows through both non-welded portions 23c and 23d. It is configured to prevent the inflow (intrusion) of air in the reverse direction (in the bag).

  With such a configuration, folded clothing or the like is stored in the compression bag through the opening, the slider 22a is moved, the chuck 22 is closed, and then the internal air is evacuated from the side of the chuck 22 to exhaust the internal air. It can be stored in a suitcase or the like as a compressed state by being discharged outside through the non-welded portions 23c and 23d. When using clothing or the like stored in a compression bag, it can be easily taken out by opening the chuck 22.

JP 2004-338784 A

  However, in the compression bag as described above, when the air in the bag body is first released to the outside, a considerably large force is required to separate the two sheets that are in close contact with each other at the non-welded portions 23c and 23d. It was necessary and less powerful women and children could not easily release air. In addition, there is a problem that a considerably large plosive sound is generated when the two sheets attached at the non-welded portions 23c and 23d are separated.

  Moreover, the compression bag having such an exhaust valve 23 has a problem that even if it is once compressed, air gradually enters the interior as time passes and cannot keep the reduced state for a long time. That is, in the configuration of the exhaust valve 23 described above, the sheets between the non-welded portions 23c and 23d and the two welded portions 23a and 23b are only pressed against each other by atmospheric pressure, so that the entry of outside air is sufficiently prevented. I could not.

  Further, an oil discharge path for filling the oil between the non-welded portions 23c, 23d of the exhaust valve 23 and the two welded portions 23a, 23b to provide an oil seal, or an air discharge path Have been proposed to increase the discharge path length by meandering, and those in which the air outlet is sealed with tape, etc., but even in these cases, the entry of outside air could not be sufficiently prevented. Moreover, in compression bags used for camping, mountain climbing, travel, etc., it is an important requirement to be as compact as possible and have a large storage space. However, in the valve structure as described above, an exhaust valve is located near the bottom of the bag body. Since the space for forming 23 has to be secured, there is also a problem that the accommodation space is reduced by that amount and the compaction of the entire compression bag is hindered.

  The present invention has been made in view of such circumstances, and can easily release air, has a good check effect, and has a simple configuration, and a vacuum cleaner is connected to the check valve. It is an object of the present invention to provide a compression bag having an adapter for the check and a check valve thereof.

(1) The check valve of the present invention is a check valve that allows air to be discharged to the outside while preventing air from entering the inside, and includes a base plate 2 having a valve port 1 and And a rubber valve 3 attached to the base plate 2 so as to cover the valve port 1 with a sealing surface 3c on the peripheral edge portion 3a formed in a thin shape.

  According to such a configuration, the elasticity of the rubber valve 3 itself allows the discharge of air from the valve port 1 to the outside, while preventing the entry of air from the outside to the valve port 1. The structure can be simplified and can be provided at low cost. Further, since the valve can be opened by deforming the thin peripheral edge 3a on which the seal surface 3c is formed, a large force is not required for the valve opening, and the valve is closed by the elasticity of the rubber valve 3 itself. Since it is valved, no troublesome lock operation is required to maintain the closed state.

(2) In a state where the base plate 2 is attached to the peripheral edge of the valve opening 5 in correspondence with the valve opening 5 formed in the sealable bag body 4,
A peripheral portion 5a of the valve opening 5 of the bag body 4 is interposed between the seal surface 3c of the rubber valve 3 and the base plate 2, and the rubber is generated by the air pressure inside the bag body 4 or the intake force from the outside. When the peripheral edge 3a of the valve 3 is pushed up from the inner side against the elastic force of rubber, the sealing surface 3c is separated from the peripheral edge 5a of the valve opening 5 of the bag 4 and the bag 4 While the flow of air from the inside to the outside is allowed, the peripheral portion 3a of the rubber valve 3 is pressed from the outside by the atmospheric pressure in addition to the elastic force of rubber, thereby opening the valve opening 5 of the bag body 4 The sealing surface 3c may be in intimate contact with the peripheral edge 5a so that the inflow of air from the outside to the inside of the bag body 4 may be prevented.

  As described above, in the state where the check valve is attached to the bag body 4, the opening of the bag body 4 is sealed after the clothing or the like is stored therein, and the bag body 4 is pressed and folded. The sealing surface 3c of the rubber valve 3 is separated from the peripheral edge of the valve opening 5 of the bag body 4 by increasing the air pressure or by applying an intake force from the outside with a vacuum cleaner, and from the inside of the bag body 4 to the outside. The bag 4 can be brought into a compressed state by letting out air.

  In the compression operation, if the internal air pressure is increased by pressing or folding the bag body 4, the peripheral edge portion 3 a of the flexible rubber valve 3 formed in a thin shape can be deformed to discharge to the outside. Therefore, a large force as in the prior art is not required, and even a weak woman or child can easily release air. When the bag body 4 is in a compressed state, the peripheral portion 3a of the rubber valve 3 is pressed from the outside by the atmospheric pressure in addition to the elastic force of the rubber, whereby the seal surface 3c is formed on the peripheral edge of the valve opening 5 of the bag body 4. Since the valve opening 5 is closed closely, the intrusion of air from the outside to the inside of the bag body 4 is effectively prevented and the compressed state of the bag body 4 is maintained.

(3) The rubber valve 3 is formed in a circular shape in a plan view, and the peripheral edge portion 3a is formed so that the wall thickness decreases in a radially outward direction, and the peripheral edge portion 3a. Further, a locked portion 3b that is locked to a locking portion 2b formed on the base plate 2 may be provided inside.

  In this way, the rubber valve 3 can be fixed to the base plate 2 by locking the locked portion 3b of the rubber valve 3 to the locking portion 2b of the base plate 2, and is formed in a circular shape. Air can be evenly discharged from the peripheral edge 3a of the rubber valve 3 to the surroundings. Further, since the peripheral edge portion 3a on which the seal surface 3c is formed is formed so as to taper thin toward the outer side in the radial direction, it is tight with respect to the peripheral edge of the valve opening 5 of the bag body 4. A close state is obtained, and air can be effectively prevented from entering the bag body 4 from the outside.

(4) The locking portion 2b is supported by a plurality of ribs 2c raised at a predetermined interval from the periphery of the valve port 1, and the locked portion 3b of the rubber valve 3 is supported by the base plate 2. In a state of being locked by the locking portion 2b formed in the above, a space portion 3e communicating with the opening 2d formed between the plurality of ribs 2c is formed inside the rubber valve 3. Good. In this way, when the bag body 4 is compressed, the air in the bag body 4 is introduced from the valve port 1 through the opening 2d between the ribs 2c into the space portion 3e without any stagnation. Since it becomes easy to raise the internal pressure inside, it becomes easy to discharge air from the peripheral edge portion 3a to the outside.

(5) A protective member 6 for protecting the rubber valve 3 may be detachably provided on the base plate 2. For example, by providing the protective member 6 for preventing the rubber valve 3 from coming into contact with or dropping off, troubles due to damage or dropping of the rubber valve 3 can be prevented.

(6) The protective member 6 is formed in a dome shape and has through holes 6 a to 6 c that allow air flow, and the periphery of the valve opening 5 of the bag body 4 is connected to the base plate 2. You may provide the clamping part 6h for clamping in between. In this case, the periphery of the valve opening 5 of the bag body 4 can be held between the base plate 2 and the base plate 2 by the holding portion 6a formed at the periphery of the protective member 6, and therefore the bag is separately attached to the base plate 2. A member for sandwiching the body 4 is not necessary.

(7) A protrusion 3 d for lifting the peripheral edge 3 a may be provided on the surface side of the peripheral edge 3 a of the rubber valve 3. If it does in this way, air can be introduce | transduced into the inside of the bag body 4 and a compression state can be cancelled | released, without opening the opening part of the bag body 4 compressed in the sealed state by lifting the protrusion 3d. .

(8) The protective member 6 may be formed with a through-hole 6d that allows a part of the protrusion 3d of the rubber valve 3 to protrude from the surface. In this way, air can be introduced into the bag body 4 by lifting the protrusion 3d without removing the protective member 6.

(9) The through-hole 6d has such a size that the protrusion 3d can be lifted and the peripheral portion 3a of the rubber valve 3 can be locked in a state of being placed on the peripheral portion 6e of the protective member 6. It may be formed. If it does in this way, air will be introduced in the inside of the bag body 4 by raising the protrusion 3d and locking the peripheral portion 3a of the rubber valve 3 in a state where it is placed on the peripheral portion 6e of the protective member 6. can do. Accordingly, air can be introduced into the bag body 4 even if the hand is released from the protrusion 3d, so that the air introduction work is improved.

(10) An adapter for connecting the suction nozzle 8 of the vacuum cleaner to the check valve according to any one of (5) to (9),
A nozzle connection portion 9 into which the suction nozzle 8 can be inserted is provided on one end side of the cylindrical body, and a valve connection portion that can be fitted to the check member protection member 6 on the other end side of the cylindrical body. 11 is provided.

  According to such a configuration, it becomes possible to connect the suction nozzle 8 of the vacuum cleaner to the check valve via the adapter, and convenience is improved. In the connected state, the check member prevents the check valve from falling off.

(11) In the compression bag provided with the check valve according to any one of (1) to (9), a seal 13 is provided at the opening 12 of the bag body 4, and the valve The base plate 2 may be attached to the periphery of the valve opening 5 so that the mouth 1 corresponds to the valve opening 5 formed in the bag body 4.

  According to such a structure, after storing clothes etc. in the bag body 4 and closing the chuck | zipper 13, an internal air pressure is raised by pressing down and folding the bag body 4, or a vacuum cleaner By applying the intake force from the outside, the elasticity of the rubber valve 3 itself allows the discharge of air from the valve port 1 to the outside, while preventing the entry of air from the outside to the valve port 1. Therefore, the configuration of the check valve can be simplified and can be provided at low cost. Further, since the valve can be opened by deforming the thin peripheral edge 3a on which the seal surface 3c is formed, a large force is not required for the valve opening, and the valve is closed by the elasticity of the rubber valve 3 itself. Since it is valved, there is no need for a troublesome locking operation to maintain the closed state. When using clothes or the like, since the compressed state is released by opening the chuck, it can be easily taken out. Furthermore, since the valve opening 5 can be formed at an arbitrary position of the bag body 4 and the check valve can be attached, no additional space is required to attach the check valve, so the compression bag 20 is made compact. it can.

  The check valve according to the present invention includes a base plate having a valve port, and a rubber valve attached to the base plate so as to cover the valve port with a sealing surface at a peripheral portion formed in a thin shape. Therefore, the elasticity of the rubber valve itself allows air to be discharged from the valve port to the outside, while preventing air from entering the valve port from the outside, thus simplifying the configuration. Can be provided inexpensively. Further, since the valve can be opened by deforming the thin-walled peripheral portion on which the seal surface is formed, a large force is not required for the valve opening. Moreover, since the valve is closed due to the elasticity of the rubber valve itself, a troublesome locking operation is not required to maintain the closed state.

  In the adapter of the present invention, a nozzle connection portion into which the suction nozzle of the vacuum cleaner can be inserted is formed on one end side of the cylindrical body, and the check valve protective member is fitted on the other end side of the cylindrical body. Since the valve connecting portion to be detachably fitted is formed, the suction nozzle of the vacuum cleaner can be connected to the check valve via the adapter, and convenience is improved. In the connected state, the check member prevents the check valve from falling off.

  In the compression bag of the present invention, clothes are stored in the bag body and the chuck is closed, and then the internal air pressure is increased by pressing or folding the bag body, or an air suction force is applied from the outside by a vacuum cleaner. By operating the air, the air can be discharged from the check valve to the outside, and the bag can be compressed. In the compression operation, the valve can be opened by deforming the thin peripheral edge portion on which the sealing surface is formed, so that a large force is not required for the valve opening. Moreover, since the valve is closed due to the elasticity of the rubber valve itself, a troublesome locking operation is not required to maintain the closed state. When using clothes or the like, since the compressed state is released by opening the chuck, it can be easily taken out. Furthermore, since the check valve can be attached by forming a valve opening at an arbitrary position of the bag body, no additional space is required to attach the check valve, so that the compression bag can be formed compactly.

Hereinafter, the check valve, the adapter, and the compression bag according to the best embodiment of the present invention will be described in detail.
FIG. 1 is a cross-sectional view of the check valve 10 attached to the compression bag, and FIG. 6 shows the compression bag 20 to which the check valve 10 is attached. This compression bag 20 is formed so that two rectangular synthetic resin sheets are joined together and welded on both sides and the bottom of the sheet, and a chuck 13 is provided at the opening so as to be sealed. A check valve 10 is provided. In these drawings, reference numeral 1 is a valve port, 2 is a base plate on which the valve port 1 is formed, 3 is a rubber valve attached to the base plate 2, and is formed in a circular shape in plan view, and its peripheral portion 3a Is formed in such a manner that the wall thickness decreases in a radially outward direction, and a downward-facing seal surface 3c is formed on the peripheral edge 3a, and the base plate 2 is formed on the inner side. A locked portion 3b that is locked to the locking portion 2b is provided. 4 is a sealable bag body, 5 is a valve opening formed in the bag body 4, and 6 is a protective member for preventing the rubber valve 3 from being damaged or falling off. It has through holes 6a to 6c that are allowed.

  In the state where the check valve 10 is attached to the compression bag 20, as shown in FIG. 1, the clamping port 6 h is formed on the periphery of the protection member 6 so as to correspond to the valve opening 5 of the bag body 4. The peripheral edge of the valve opening 5 of the bag body 4 is sandwiched between the base plate 2 and the peripheral edge of the valve opening 5 of the bag body 4 between the seal surface 3 c of the rubber valve 3 and the base plate 2. 5a is interposed. With such a configuration, after storing clothes or the like in the bag body 4 and closing the chuck 13, the internal air pressure is increased by pressing or folding the bag body 4, or as described later, By connecting the vacuum cleaner and applying the intake force to the check valve 10 from the outside, the peripheral edge portion 3a of the rubber valve 3 is pushed up from the inside against the elastic force of the rubber, so that the bag 4 The seal surface 3c is separated from the peripheral edge 5a of the valve opening 5, and the outflow of air from the inside of the bag body 4 to the outside is allowed.

  In the compression operation, if the internal air pressure is increased by pressing or folding the bag body 4, the peripheral edge portion 3 a of the flexible rubber valve 3 formed in a thin shape can be deformed to discharge to the outside. Therefore, a large force as in the prior art is not required, and even a weak woman or child can easily release air. When the bag body 4 is in a compressed state, the peripheral edge portion 3a of the rubber valve 3 is pressed from the outside by the atmospheric pressure in addition to the elastic force of rubber, thereby sealing the peripheral edge portion 5a of the valve opening 5 of the bag body 4. Since the face 3c is in close contact with the valve opening 5, the intrusion of air from the outside into the bag body 4 is effectively prevented and the compressed state of the bag body 4 is stably maintained.

  Thus, since the check function is achieved by the elasticity of the rubber valve 3 itself, the structure of the check valve 10 can be simplified and can be provided at low cost. Further, since the valve can be opened by deforming the thin peripheral edge 3a on which the seal surface 3c is formed, a large force is not required for the valve opening, and the valve is closed by the elasticity of the rubber valve 3 itself. Since it is valved, no troublesome lock operation is required to maintain the closed state. Since the check valve 10 can be attached by forming the valve opening 5 at any location of the bag body 4, no additional space is required to attach the check valve 10, and the compression bag 20 can be made compact. There is also an advantage that can be formed.

  The overall structure will be described in more detail. As shown in FIGS. 2A to 2C, the peripheral edge portion 3a of the rubber valve 3 formed in a circular shape in plan view has a wall thickness outward in the radial direction. Since the seal surface 3c is formed in a ring shape at the lower end of the tip, it is tightly sealed with respect to the peripheral portion 5a of the valve opening 5 of the bag body 4. The inner lower central portion is cut out in a circular shape, and the locked portion 3b is formed in an arc groove shape at the upper portion of the cut out portion, and the locked portion 3b is formed in the base plate 2. It is detachably locked to the locking portion 2b. On the other hand, a protrusion 3d for lifting the peripheral edge 3a is provided on the surface side of the peripheral edge 3b of the rubber valve 3.

  As shown in FIGS. 3A to 3C, the base plate 2 is formed in a disk shape in plan view, and a locking groove formed on the outer periphery of the substrate 2 a on the lower inner periphery of the protective member 6. (Clamping portion) A circumferential protrusion 2h for locking 6h is formed. The locking portion 2b for locking the rubber valve 3 is formed in a cross shape and is supported by four ribs 2c raised from the peripheral edge of the valve port 1 at a predetermined interval. In addition, the latching | locking part 2b may be formed in disk shape. In a state where the locked portion 3b of the rubber valve 3 is locked to the locking portion 2b, a space portion 3e communicating with the opening 2d formed between the plurality of ribs 2c is provided inside the rubber valve 3. In order to form the bag body 4 (see FIG. 1), when the bag body 4 is compressed, the air in the bag body 4 is introduced into the space 3e through the opening 2d between the valve port 1 and the rib 2c without any delay. Thus, the internal pressure inside the rubber valve 3 can be easily increased, and air can be easily discharged from the peripheral edge 3a to the outside. On the other hand, on the back surface of the base plate 2, a plurality of ridges 2 r are formed radially from the valve port 1, and the valve port 1 is not blocked by the stored items stored in the bag body 4. Air is introduced into a radial groove formed between the ridges 2r and 2r so that the air can be discharged from the valve port 1 without stagnation.

  As shown in FIGS. 4A to 4C, the protection member 6 has through holes 6a to 6c arranged in three rows at predetermined intervals in the circumferential direction, and the outermost through hole. 6a is formed in a peripheral edge 6e formed in an upwardly convex arcuate cross section, and communicates with a through hole 6b formed in the inner row thereof via a radial communication groove r. With such a configuration, as will be described later, when the suction force of the vacuum cleaner is applied, even if the back side of the rubber valve 3 is in close contact with the through hole 6b in the inner row, the through hole 6b is formed in the communication groove r. Since it is in communication with the outermost through hole 6a, a sufficient intake operation can be ensured. Further, the center of the outermost through hole 6 a is disposed at a position slightly outside the rubber valve 3. And the through-hole 6d for making the protrusion 3d of the rubber valve 3 protrude is formed in the arcuate long hole in the dome-shaped part inside the peripheral part 6e. Such a protective member 6 can prevent the occurrence of troubles due to damage or dropout of the rubber valve 3, and also enables an intake operation by a vacuum cleaner as will be described later. In addition, this through-hole 6d is not limited to the circular arc-shaped long hole like illustration, You may form in an appropriate shape. P indicates a pin gate.

  As shown in FIG. 1, a part of the protrusion 3d provided on the surface side of the rubber valve 3 protrudes from a through hole 6d formed in the protective member 6, and the protrusion 3d is sealed by lifting the protrusion 3d from the outside. Even if the chuck 13 of the bag body 4 compressed in the state is not opened, the check valve 10 can be opened and air can be introduced into the bag body 4 to release the compressed state. In the state in which the protrusion 3d is lifted, as shown in FIG. 5, the seal surface 3c of the rubber valve 3 is lifted away from the peripheral portion 5a of the valve opening 5 of the bag body 4, and the seal surface 3c is moved to the peripheral portion. 3a can be locked in a state of being placed on the peripheral edge 6e of the protection member 6, and air can be introduced into the bag body 4 in this state. In this way, if the through-hole 6d is formed in such a size that the protrusion 3d can be lifted and the sealing surface 3c and the peripheral edge 3a can be locked to the peripheral edge 6e of the protective member 6, the hand can be moved from the protrusion 3d. The bag 4 can be inflated even in the separated state. Thereby, when the large number of compressed bags 20 that have been compressed in the transport process are inflated after the transport is completed, the workability is remarkably improved.

  7A and 7B show an adapter 30 for connecting the suction nozzle 8 (see FIG. 8) of the electric vacuum cleaner to the check valve 10. The adapter 30 is provided with a nozzle connection portion 9 into which the suction nozzle 8 can be inserted on one end side of the cylindrical body, and a valve connection portion that can be fitted to the protective member 6 on the other end side of the cylindrical body. 11 is provided. The nozzle connecting portion 9 slightly narrows the inner diameter on the tip side (lower side in the figure) to make it easier to accommodate the suction nozzle 8. On the other hand, the valve connecting portion 11 is provided with a plurality of downward projecting portions 11c (eight pieces) having arcuate contact surfaces that fit into the curved surface of the peripheral edge portion 6e of the protective member 6, and protect the valve connecting portion 11 The member 6 can be fitted with good stability.

  In order to connect the suction nozzle 8 of the vacuum cleaner to the check valve 10 (see FIG. 8), first, as a state where the valve connection portion 11 is fitted on the peripheral edge portion 6e of the protection member 6 of the check valve 10, What is necessary is just to insert the suction nozzle 8 in the nozzle connection part 9, and it can suction in the state. At this time, even if the back side of the rubber valve 3 is in close contact with the through holes 6b, 6c in the inner row, the through hole 6b communicates with the outermost through hole 6a via the communication groove r, so that the sufficient The intake operation can be ensured, and the rubber valve 3 can be prevented from falling off. The communication groove r may be formed so as to allow communication between the through holes 6b and 6c.

  FIG. 9 shows a different example of the check valve 10. In this case, the peripheral portion 5 a of the valve opening 5 of the bag body 4 is replaced with the outer periphery of the base plate 2 by a ring-shaped clamping member 16 instead of the protective member 6. Is held between. That is, a locking groove 16h that is locked to the circumferential protrusion 2h of the base plate 2 is formed at the lower inner periphery of the clamping member 16, and the bag 4 is formed between the locking groove 16h and the circumferential protrusion 2h. The peripheral edge of the valve opening 5 is clamped, and the upper inner periphery of the clamping member 16 is inclined inward to cover the peripheral edge portion 3a of the rubber valve 3 so as to prevent it from falling off. When a vacuum cleaner is not used, the same effect as the previous embodiment can be obtained even with such a simple configuration.

  It should be noted that the present invention is not limited to the embodiment, and it is free to make design changes or improvements as necessary, as long as it does not depart from the gist of the invention. For example, the peripheral portion of the valve opening 5 of the bag body 4 may be adhered to the base plate 2 with an adhesive or the like, and the peripheral portion 3a of the rubber valve 3 may be directly pressed against the base plate 2. Further, in the present embodiment, the air in the bag body 4 is introduced into the space portion 3e through the opening 2d between the valve port 1 and the rib 2c, but the locked portion 3b of the rubber valve 3 is supported. A rib 2c for supporting the locking portion 2b for standing is provided in the center of the base plate 2, and air is introduced into the space portion 3e from a plurality of valve ports 1 formed in the surrounding base plate 2. Also good. Moreover, you may make it improve the sealing performance by forming the plug part inserted in the valve port 1 so that attachment or detachment is possible inside the rubber valve 3. The shape of the rubber valve 3 is not limited to a circular shape, and may be an ellipse or a rectangle. Furthermore, the protective member 6 may be a flat plate shape without being limited to a dome shape. Further, the mounting position of the check valve 10 may not be in the vicinity of the chuck 13 and may be appropriately selected. The chuck 13 of the compression bag 20 may have a slider.

It is sectional drawing of the non-return valve which concerns on embodiment of this invention. (A) is a top view of the rubber valve, (b) is a sectional view, and (c) is a bottom view. (A) is a plan view of the base plate, (b) is a cross-sectional view, and (c) is a bottom view. (A) is a top view of the protective member, (b) is a cross-sectional view, and (c) is a bottom view. It is a front view of the compression bag. It is sectional drawing of the non-return valve of the state which lifted the protrusion and released the seal. (A) is sectional drawing of the adapter, (b) is a bottom view. It is explanatory drawing at the time of use of the adapter. It is sectional drawing which shows the example from which the check valve differs. It is a front view which shows an example of the conventional compression bag.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Valve mouth, 2 ... Base plate, 2b ... Locking part, 2c ... Rib, 2d ... Opening, 3 ... Rubber valve, 3a ... Peripheral part, 3b ... Locked part, 3c ... Sealing surface, 3d ... Projection, DESCRIPTION OF SYMBOLS 4 ... Bag body, 5 ... Valve opening, 5a ... Peripheral part, 6 ... Protection member, 6a-6d ... Through-hole, 6h ... Clamping part, 8 ... Suction nozzle, 9 ... Nozzle connection part, 10 ... Check valve, DESCRIPTION OF SYMBOLS 11 ... Valve connection part, 12 ... Opening part, 13 ... Chuck

Claims (11)

  A check valve that allows air to be discharged to the outside while preventing air from entering the inside, and is formed into a thin wall with a base plate (2) having a valve port (1) And a rubber valve (3) attached to the base plate (2) so as to cover the valve port (1) with a sealing surface (3c) at the peripheral edge (3a). Stop valve. The base plate (2) is attached to the periphery of the valve opening (5) so as to correspond to the valve opening (5) formed in the sealable bag body (4). Then
A peripheral portion (5a) of the valve opening (5) of the bag body (4) is interposed between the sealing surface (3c) of the rubber valve (3) and the base plate (2), and the bag body ( 4) The valve opening of the bag body (4) by the peripheral portion (3a) of the rubber valve (3) being pushed up from the inside against the elastic force of the rubber by internal air pressure or external intake force While the seal surface (3c) is separated from the peripheral portion (5a) of (5) to allow the outflow of air from the inside of the bag body (4) to the outside, in addition to the elasticity of rubber When the peripheral edge (3a) of the rubber valve (3) is pressed from the outside by atmospheric pressure, the seal surface (3c) is formed on the peripheral edge (5a) of the valve opening (5) of the bag body (4). The inflow of air from the outside to the inside of the bag body (4) is closely configured to be prevented. Check valve of the placement.   The rubber valve (3) is formed in a circular shape in a plan view, and the peripheral edge (3a) is formed so that the thickness thereof is tapered in a radially outward direction, and the peripheral edge thereof. The locked portion (3b) locked to the locking portion (2b) formed on the base plate (2) is provided inside the (3a), according to claim 1 or 2. Check valve.   The locking portion (2b) is supported by a plurality of ribs (2c) raised at a predetermined interval from the periphery of the valve port (1), and the locked portion ( In a state where 3b) is locked to the locking portion (2b) formed on the base plate (2), an opening formed between the plurality of ribs (2c) is formed inside the rubber valve (3). The check valve according to claim 3, wherein a space (3e) communicating with (2d) is formed.   The check valve according to any one of claims 1 to 4, wherein a protective member (6) for protecting the rubber valve (3) is detachably provided on the base plate (2).   The protective member (6) is formed in a dome shape and has through holes (6a) to (6c) that allow air to flow, and the periphery of the valve opening (5) of the bag body (4). The check valve according to claim 5, further comprising a clamping portion (6h) for clamping the portion (5a) between the base plate (2) and the base plate (2).   The protrusion (3d) for raising this peripheral part (3a) was provided in the surface side of the peripheral part (3a) of the said rubber valve (3), The Claim 1 thru | or 6 characterized by the above-mentioned. Check valve.   8. The check valve according to claim 7, wherein a through hole (6 d) is formed in the protective member (6) so that a part of the protrusion (3 d) of the rubber valve (3) protrudes from the surface.   The through hole (6d) locks the peripheral edge (3a) of the rubber valve (3) on the peripheral edge (6e) of the protective member (6) by lifting the protrusion (3d). The check valve according to claim 8, wherein the check valve is formed in a size that can be adjusted. An adapter for connecting a suction nozzle (8) of a vacuum cleaner to the check valve according to any one of claims 5 to 9,
A nozzle connection portion (9) into which the suction nozzle (8) can be inserted is provided on one end side of the cylindrical body, while a protective member (6) of the check valve is covered on the other end side of the cylindrical body. An adapter provided with a fitting valve connection (11). A compression bag comprising the check valve according to any one of claims 1 to 9,
The opening (12) of the bag body (4) is provided with a sealable chuck (13) so that the valve port (1) corresponds to the valve opening (5) formed in the bag body (4). The base plate (2) is attached to the periphery of the valve opening (5).

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