JP2000309362A - Valve and bag-like shock absorbing material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a valve capable of pouring and discharging fluid, facilitating handling, attaining a superior air-tightness and a superior discharging property and further provide a bag-like shock-absorbing material having this valve showing a superior strength and a superior cushioning property. SOLUTION: There are provided a valve and a bag-like shock absorbing material composed of an air-tight multi-layer bag using this valve, wherein this valve is comprised of a cylindrical case 4 having a fixing segment 3 for a container; a hollow outer lid 5 having means thread ably engaged with the cylindrical case 4; and an inner lid 6 stored between the outer lid 5 and the cylindrical case 4, the cylindrical case 4 has a mountain-shaped protrusion 2 at the central part of a bottom segment, has a flowing hole 7 communicated with the container around the mountain-shaped protrusion, the inner lid 6 has a fluid passage 1 at its central axis, is circumferential edge has a sealing means between it and the cylindrical case 4 through a packing 8, the outer lid 5 is overlapped on the inner lid 6 and arranged in such a way that an upward or downward motion of the inner lid 6 can be carried out through a threaded engagement with the cylindrical case 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve capable of injecting and discharging a fluid, and more particularly, to a cushioning material disposed in a gap between commodities to prevent the commodities from being damaged during transportation or transportation of the commodities. The present invention relates to a valve for an airtight bag used as a valve, and a bag-like cushioning material provided with the valve.

[0002]

2. Description of the Related Art Conventionally, air has been injected into and discharged from an airtight bag by providing a cylindrical entrance at one end of the bag and inserting or extracting a rubber stopper or the like at the entrance. In addition, a thread was cut into the cylindrical entrance, and the entrance was opened and closed with a screw stopper. Further, Japanese Patent Publication No. 52-11898 discloses a sheet-shaped gas sealing valve having a tongue-shaped portion by heat-sealing both side surfaces of two flat polyethylene sheets.

[0003]

However, it is easy to use the rubber plug, but if the plug is not plugged immediately after gas injection, the internal pressure tends to decrease, and if the internal pressure increases, the plug may fall off. It takes a long time to discharge gas after use. The use of the threaded stopper does not cause the stopper to come off, but it takes a long time to discharge gas as in the case of the above, and the workability is reduced. In addition, the sheet-shaped gas sealing valve has a problem in airtightness, and a straw-shaped tube is inserted and extracted when bleeding air, which takes time and takes a long time to discharge.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a valve which is easy to handle and which is excellent in airtightness and dischargeability, particularly a valve which is excellent in airtightness over a long period of time and the strength and action of the valve using the valve. An object of the present invention is to provide a bag-like cushioning material having excellent properties.

[0005]

Means for Solving the Problems The present inventors have conducted intensive studies to improve the above-mentioned drawbacks. As a result, the fluid passage portion provided in the lid is made movable, and the angled convex portion serving as a stopper is provided on the container side. With the fixed structure, after the fluid is injected, the ridge is inserted deeply into the fluid passage due to the internal pressure of the container and is securely sealed. The present invention has been completed. That is, the present invention includes the following 1 to 7. 1. A valve attached to a container and capable of injecting and discharging a fluid, wherein the valve is disposed so as to be able to open and close the cylindrical fluid passage 1 and a central axis of the passage so as to align the central axis thereof. The bottom of the chevron is located on the container side, the diameter of the bottom is larger than the diameter of the passage, and the material constituting the passage 1 and the chevron of the chevron 2 At least one of the materials is an elastic body. 2. A cylindrical case 4 having an attachment portion 3 to a container, a hollow outer lid 5 having a means for screwing with the cylindrical case 4, and an inner case accommodated between the outer lid 5 and the cylindrical case 4; The cylindrical case 4 has a mountain-shaped convex portion 2 at the center of the bottom and a flow hole 7 around the mountain-shaped convex portion communicating with the container. The inner lid 6 has a central axis at its central axis. And a peripheral portion having sealing means such as a packing 8 between the cylindrical case 4 and the outer lid 5 so as to overlap the inner lid 6 to form the cylindrical case 4. The valve described above, wherein the valve is arranged so that the inner cover 6 can be moved up and down by screwing with the valve 4. 3. The valve as described above, wherein the fluid passage 1 has a tapered portion 9 extending toward the container. 4. The said valve whose material is a synthetic resin. 5. The above valve in which the cylindrical case 4 and the inner lid 6 are connected by a band 10. 6. The valve described above, wherein the projection 11 is disposed on the container side of the bottom of the cylindrical case 4. 7. The container is a bag, and the bag is a multilayer bag 12 whose inner layer is made of an airtight bag made of synthetic resin and whose outer layer is made of kraft paper.
And a bag-like cushioning material in which the above-mentioned valve is attached to one end of the multilayer bag body 12.

Here, the container means a container capable of containing a fluid, and the shape, material, and size can be appropriately selected according to the type of the fluid. In addition, fluid
Usually means gas and liquid.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The valve and the bag-like cushioning material of the present invention will be specifically described below with reference to the drawings. 1 to 10 are views showing an embodiment of the valve of the present invention and a bag-like cushioning material using the valve, FIG. 1 is a cross-sectional view of a closed valve, FIG. 2 is a cross-sectional view of an open valve, FIG. 3 is a cross-sectional view of the cylindrical case 4, and FIG.
5 is a sectional view of the inner cover 6, FIG. 6 is a top view of the inner cover 6, FIG. 7 is a partial sectional view of the outer cover 5, FIG. 8 is a bottom view of the outer cover 5, and FIG. FIG. 10 is a plan view of FIG. 10, and FIG. 10 is a partial cross-sectional view of a bag-like cushioning material provided with a valve with an outer lid and an inner lid removed.

FIG. 1 shows a state in which the fluid passage 1 and the chevron 2 are fitted and the valve is closed, and a cylindrical case 4 having an attachment portion 3 to a container, a cylindrical case 4 It comprises a hollow outer lid 5 having a screwing means, and an inner lid 6 housed between the outer lid 5 and the cylindrical case 4, and the cylindrical case 4 has a chevron 2 at the bottom center. The inner lid 6 has a fluid passage 1 whose central axis is aligned with the central axis thereof, and has a peripheral portion between the inner case 6 and the cylindrical case 4. Since the outer lid 5 is placed over the inner lid 6 so that the inner lid 6 can be moved up and down by screwing with the cylindrical case 4, the fluid passage 1 and the chevron are formed. The projection 2 is fitted and the valve is closed. Here, the packing 8 is preferably an O-ring made of synthetic rubber. FIG. 2 shows a state where the fitting between the fluid passage 1 and the chevron 2 is separated and the valve is opened.
When the outer lid 5 is turned to move the inner lid 6 upward, a gap is formed between the fluid passage 1 and the chevron 2, from which fluid is injected and discharged into the container. At this time, the band 10 serves as a clip for holding the outer lid 5 so as not to come off from the inner lid 6 in order to transmit the movement of the outer lid 5 to the inner lid 6. Here, instead of the band 10, a C-ring serving as a clip for holding down may be put on the inner lid 6.

FIG. 3 is a cross-sectional view of the cylindrical case 4, and an outer lid 5 is provided on the outer peripheral surface of the cylindrical case 4 having the mounting portion 3 for the container.
A screw groove 20 is cut for screwing, and a groove 14 for receiving a band is provided at a lower portion. Further, the cylindrical case 4 has a mountain-shaped convex portion 2 serving as a stopper at the center of the bottom portion, and the mountain-shaped convex portion 2 and the mounting portion 3 to the container are connected by a rib 13, and a gap between the ribs, That is, a circulation hole 7 communicating with the container is formed around the chevron 2. Here, the chevron 2 must be installed such that its bottom surface is on the container side and its crest is on the fluid passage 1 side, and the diameter of its bottom surface must be larger than the diameter of the fluid passage. . In this manner, after the fluid is injected, the gas-tightness is maintained for a long period of time because the convexity of the chevron and the fluid passage are more firmly fitted by the internal pressure of the container. The depression 21 on the bottom of the chevron 2 is effective in terms of material saving, weight reduction and molding workability in the case of a large size, but the depression 21 may be omitted in the case of a small size. FIG. 4 is a bottom view of the cylindrical case 4, and the bottom of the chevron 2 and the mounting portion 3 to the container are formed by ribs 13.
The gap between the ribs 13 forms a plurality of flow holes 7 communicating with the container around the chevron 2, and the mounting portion 3 around the plurality of flow holes 7 to the container includes a container. A plurality of protrusions 11 are provided on the side. The protrusion 11 reinforces the mounting portion 3 to the container. Particularly when the container is a bag, the reinforcing effect is large, and a gap is formed between the valve and the bag to facilitate fluid injection and discharge. .

FIG. 5 is a cross-sectional view of the inner lid 6, and FIG. 6 is a top view of the inner lid 6, which has a hollow fluid passage 1 at its central axis, and a lower portion of the fluid passage 1 has a tapered portion 9 formed therein. A groove 14 for receiving the band at the upper part of the periphery, a groove 15 for receiving the outer lid 5 below the groove, and a groove 16 for receiving the packing 8 at the lower part of the periphery. 6 and the cylindrical case 4 are sealed with a packing 8 interposed therebetween. Tapered part 9
The convex shape 2 is provided so as to bite into and fit into the tapered portion 9 to completely seal the fluid passage 1, and also to provide a gap when the valve is opened. This tapered part 9
May be provided in the entire fluid passage, or may be a part as shown in FIG. The cavity 17 of the inner lid 6 is effective in terms of material saving, weight reduction, and moldability in the case of a large size, but the cavity 17 may be omitted in the case of a small size.

FIG. 7 is a partial sectional view of the outer lid 5, FIG. 8 is a bottom view of the outer lid 5, and the outer lid 5 is empty at the center so that the inner lid 6 can be inserted. A hole 18 is provided on the upper surface so that the inner lid can be moved up and down. A thin groove 19 is provided on the outer peripheral surface of the outer lid to prevent slippage when turning the lid, and a thread groove 2 is formed on the inner peripheral surface for screwing with the cylindrical case 4.
0 is notched. FIG. 9 is a plan view of the band 10. The band 10 connects the cylindrical case 4 and the inner lid 6 with a ring so that the two are not separated from each other, thereby preventing the lid from being lost. The band 10 also functions as a clip for holding the outer lid 5 so as not to come off from the inner lid 6.

In order to increase the degree of sealing, the material of the valve of the present invention requires that at least one of the material forming the fluid passage 1 and the material of the chevron 2 be made of an elastic material. If it is, the degree of sealing can be further increased. Specifically, examples of the synthetic resin include polyethylene, polypropylene, polyurethane, polyester polycarbonate, vinyl chloride resin, silicone resin, and fluororesin, and metals such as iron, copper, and aluminum can also be used. Of these, polyethylene and polypropylene are preferred from the viewpoint of lightness and good moldability. These materials can be appropriately selected depending on the material of the container and the type of fluid contained in the container. The size of the valve of the present invention is arbitrarily set according to the volume of the container, and the diameter of the outer lid (5) is 1 cm.
About 10 to 10 cm is practical.

FIG. 10 is a partial sectional view of a bag-like cushioning material provided with a valve with a lid removed, wherein the container is a bag, and the bag is an airtight bag whose inner layer is made of synthetic resin. The outer layer is made of kraft paper, and the outer layer is made of a kraft paper. A hole is made in one end of the multilayer bag, and the mounting portion 3 of the cylindrical case 4 to the container is overlapped with a hermetic bag made of synthetic resin and thermally welded. Is attached and the outside is reinforced with kraft paper to form a bag-like cushioning material. With the lid removed, the valve can rapidly discharge a large amount of air from the plurality of flow holes 7 leading to the container around the chevron 2 regardless of the fluid passage 1. In addition, since the lid is connected to the cylindrical case 4 by the band 10, it does not fall off. Examples of the synthetic resin used for the inner layer of the bag include polyethylene, polypropylene, polyurethane, polyester, polycarbonate, vinyl chloride resin, silicone resin, fluororesin, and the like. A plurality of these films can be used. As the outer layer of kraft paper, a plurality of kraft papers laminated with kraft paper, polyethylene or the like can be used. In the present invention,
Although the size of the multilayer bag (12) is not particularly limited, it is practically about 0.5 m × 0.5 m to 2 m in length and width.

[0014]

EXAMPLES Example 1 Valve parts as shown in FIGS. 3 to 9 were molded using polyethylene (trade name: Novatec, manufactured by Nippon Polychem Co., Ltd.), and they were combined as shown in FIG. A valve having a diameter of 4.5 cm for the outer lid (5) was produced. Width 99c
A polyethylene tube (manufactured by Okura Industry Co., Ltd.) having a thickness of 0.15 mm and a thickness of 0.15 mm was cut to a length of 1.5 m, and both ends were heat-welded to form an airtight bag. A hole was made in one end of the airtight bag, and the valve attachment portion (3) of the valve obtained above to the container of the tubular case (4) was overlapped with the airtight bag and heat-welded to mount the valve. Further, the outer side of the airtight bag is wrapped four times with polyethylene laminated kraft paper (83 g / m ² : trade name: polylaminated paper manufactured by Tokai Koji Paper Co., Ltd.) and hardened with an adhesive to form a multilayer bag (12). Then, a bag-like cushioning material was produced. Air (0.2 kgf / cm ² ) was injected into the bag-like cushioning material, and the valve was closed to form a bag of about 90 × 150 × 25 cm. The bag cushion filled with air was able to support a load of about 5000 kg. In addition, when the apparatus was left under no load for 60 days, almost no air leakage was observed. In addition, when the lid of the valve was removed for evacuation, the bag flattened in about 10 minutes.

[0015]

Since the valve of the present invention has the above-mentioned special structure, it is easy to handle to allow the fluid to be injected and discharged, and is excellent in airtightness and dischargeability. Also, by making the portion of the fluid passage provided in the lid movable, and fixing the mountain-shaped convex portion serving as a plug to the container side, the plug is inserted deeply due to the internal pressure at the time of fluid injection, and the lid is securely sealed at the time of exhaustion. If you remove, you can exhaust in a short time. Therefore, the valve of the present invention can be applied to a wide range of business containers and daily necessities such as bottles, bottles, and cans for taking in and out fluid. Furthermore, the bag-shaped cushioning material using the valve of the present invention is excellent in strength, traction, and workability, and is disposed in a gap between products in order to prevent breakage of the product during transportation or transportation of the product. Useful as a cushioning material.

[Brief description of the drawings]

FIG. 1 is a closed cross-sectional view of a valve.

FIG. 2 is an open sectional view of the valve.

FIG. 3 is a cross-sectional view of the cylindrical case 4.

FIG. 4 is a bottom view of the cylindrical case 4.

FIG. 5 is a sectional view of the inner lid 6.

FIG. 6 is a top view of the inner lid 6. FIG.

FIG. 7 is a partial sectional view of the outer lid 5.

FIG. 8 is a bottom view of the outer lid 5. FIG.

FIG. 9 is a plan view of the band 10. FIG.

FIG. 10 is a partial cross-sectional view of a bag-like cushioning material provided with a valve with a lid removed.

[Explanation of symbols]

 1: fluid passage 2: mountain-shaped convex portion 3: mounting portion 4: cylindrical case 5: outer cover 6: inner cover 7: communication hole 8: packing 9: tapered portion 10: band 11: projecting portion 12: multilayer bag 13 : Rib 14: band groove 15: outer lid groove 16: packing groove 17: cavity 18: hole 19: narrow groove 20: screw groove 21: hollow

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3E064 BA05 BA22 BB03 EA30 HR04 3E084 AA06 AA12 AA24 AA37 AB01 AB10 BA02 CB02 DA01 DB12 EA02 EB02 FB02 GA01 GB01 HA04 HB03 HD04 JA15 KA02 KA11 KA16 LA15 LB02 LD08

Claims (7)

[Claims] 1. A valve mounted on a container to allow fluid injection and discharge, the valve comprising: a cylindrical fluid passage 1;
A mountain-shaped convex portion 2 arranged so as to be able to open and close the passage so that the central axis is aligned with the central axis of the passage, the bottom surface of the mountain-shaped convex portion is located on the container side, and the diameter of the bottom surface is equal to the diameter of the passage. A diameter of which is larger than a diameter of at least one of the material forming the passage and the material of the chevron. 2. A cylindrical case 4 having an attachment portion 3 to a container.
And a hollow outer lid 5 having a means for screwing with the cylindrical case 4, and an inner lid 6 housed between the outer lid 5 and the cylindrical case 4. A flow hole 7 having a chevron 2 at the center of the bottom and surrounding the chevron.
The inner lid 6 has the fluid passage 1 whose central axis is aligned with its central axis, and has a sealing means 8 between its peripheral edge and the cylindrical case 4, and the outer lid 5 has an inner lid 2. The valve according to claim 1, wherein the valve is arranged so as to overlap with the lid 6 and move up and down the inner lid 6 by screwing with the cylindrical case 4. 3. 3. The valve according to claim 1, wherein the fluid passage has a tapered portion extending toward the container. 4. The valve according to claim 1, wherein the elastic body is a synthetic resin. 5. The valve according to claim 1, wherein the cylindrical case and the inner lid are connected by a band. 6. A projection 11 is provided at the bottom of the cylindrical case 4 on the container side.
The valve according to any one of claims 1 to 4, wherein a valve is provided. 7. The container is a bag, and the bag is a multilayer bag 12 whose inner layer is made of an airtight bag made of synthetic resin and whose outer layer is made of kraft paper. 1 to
A bag-shaped cushioning material provided with the valve according to any one of claims 6 to 10.