JP2013233941A - Holding tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a holding tool for obtaining a consistent sealing effect by solving a problem that the sealing property should be kept by curving a sheet body, resin sheets of different shrinkage factors should be superposed in a multilayered manner for a means of that purpose, conditions for producing the sheet are limited, in addition, the shrinkage factors are largely varied according to the forming condition, and the predetermined curved shape cannot be obtained.SOLUTION: A holding tool 7 holds an opening 4 of a bag body in an opening/closing manner. The holding tool 7 includes a holding part for pressing a surface of the bag body, and a non-holding part of the holding tool 7.

Description

  The present invention relates to a liquid discharge container, and more particularly to a discharge mechanism intended to prevent liquid backflow and air inflow.

  As a container that can prevent the backflow of air, a closing valve structure has been proposed and put on the market. A closed valve structure that forms a flat cylindrical air passage by facing two exterior sheets using a non-breathable sheet as one of them, and closes the air path by bringing the exterior sheets into close contact with each other There is.

Japanese Patent No. 3989815

  However, in these conventional techniques, the sheet body must be curved and kept hermetically sealed, and as a means for that purpose, it is necessary to superimpose resin sheets having different shrinkage ratios in multiple layers. The conditions were limited. In addition to this, there is a large variation in shrinkage ratio depending on the molding conditions, and a constant curved shape cannot be obtained, so it has been difficult to obtain a stable sealing effect.

  The gist of the present invention is a sandwiching tool that sandwiches and opens the opening of the bag body, the gripping tool having a sandwiching part that presses the surface of the bag body and a non-sandwich part. To do.

  The present invention is a holding tool for holding the opening of the bag body so as to be openable and closable, and the holding tool is a holding tool having a holding portion for pressing the surface of the bag body and a non-holding portion. Thus, the content liquid can be reliably discharged, and the backflow of the liquid and the inflow of air can be prevented.

The side view and partial sectional view which show 1st Example. The front view which shows 1st Example. The perspective view which shows 1st Example. FIG. 4 is a detailed view of a main part of FIG. 3. The side view and partial sectional view which show 2nd Example. The front view which shows 2nd Example. The perspective view which shows 2nd Example. FIG. The perspective view of the clamping tool which shows 2nd Example. The side view and partial sectional view showing a third embodiment. The front view which shows 3rd Example. The perspective view which shows 3rd Example. FIG. 13 is a detailed view of a main part of FIG. 12. The perspective view of the clamping tool which shows 3rd Example. The side view and fragmentary sectional view which show 4th Example. The front view which shows 4th Example. The perspective view which shows 4th Example. FIG. 18 is a detailed view of a main part of FIG. 17. The perspective view of the clamping tool which shows 4th Example. The perspective view which shows the modification of 3rd Example. The side view which shows the modification of 3rd Example. FIG. 22 is a detailed view of a main part of FIG. 21.

DESCRIPTION OF EMBODIMENTS Embodiments for carrying out the present invention will be described with reference to the drawings. 1 to 4 show a first embodiment of the present invention. 1 and 2, the bag body 1 is provided with a flat portion 2 at one end, and an opening 4 is provided at an end portion 3 of the flat portion 2. Further, the periphery 5 and the end portion 6 of the bag body 1 have a sealed structure in which welding, bonding, or an integrated structure is formed. And the content liquid L is accommodated in the bag body 1.
In this example, the periphery 5 has a sealed structure formed in a cylindrical shape, and the end portion 6 has a structure in which the content liquid L is filled in the bag body 1 and then welded and sealed. Further, a holding tool 7 is detachably attached to the flat portion 2 of the bag body 1.
The bag 1 is made of polypropylene, high density polyethylene, low density polyethylene, linear low density polyethylene, polyamide, polyvinyl alcohol, polyvinylidene chloride, polyvinyl chloride, ethylene vinyl acetate, ethylene vinyl alcohol copolymer, polyurethane, It is preferable to use a soft material that is easily deformable, such as a synthetic resin such as a thermoplastic elastomer or a sheet of aluminum or a composite material obtained by laminating them.

Next, in FIG.3 and FIG.4, the clamping tool 7 is demonstrated. FIG. 3 is a perspective view of FIGS. 1 and 2. The clamping device 7 is provided with claw portions 8 that engage with both side portions 9 of the opening 4 with respect to the flat portion 2 of the bag body 1. The claw portions 8 are provided with a clearance C and face each other.
Further, as a material for forming the holding tool 7, metal materials such as stainless steel, brass, aluminum, iron, polyacetal, polycarbonate, polymethyl methacrylate, polyethylene terephthalate, polystyrene, vinyl chloride, polyamide, polyarylate, liquid crystal polymer, Polyether ether ketone, acrylonitrile butadiene styrene copolymer, polypropylene, high density polyethylene, low density polyethylene, linear low density polyethylene, polyphenylene ether, polyphenylene oxide, polyphenylene sulfide, polybutadiene, polybutylene terephthalate, polymethylpentene, biodegradation Polymer resins such as water-soluble plastics.
Note that a release layer is formed on the inner surface of the end portion (near) 3 of the flat portion 2. Specific examples of the release layer include silicone resin, polytetrafluoroethylene resin, and wax. Note that the release layer is formed only on the end portion 3 and is not provided on the inner surface of the flat portion 2. By providing the release layer, the inner surface of the end portion 3 of the flat portion 2 does not adhere to each other, and the content liquid L is not guided to the opening portion 4 along the inner surface of the flat portion 2 by capillary action. As a result, it is possible to prevent the content liquid L from adhering to the surroundings or from attaching dirt to the opening 4.

Next, the discharge operation will be described. The opening 4 of the bag body 1 is sealed by the claw portion 8 of the holding tool 7 so that both side portions 9 cannot be opened and closed. Moreover, although the center part 10 of the opening part 4 can be opened and closed freely by the clearance C provided in the nail | claw part 8 of the clamping tool 7, it is normally clamped so that an inner wall may be in a close contact state. Here, when the user presses the pressing portion T of the bag body 1, the internal pressure of the bag body 1 increases, and the content liquid L moves to discharge from the bag body 1. That is, the content liquid L is prevented from moving by the bag body 1 whose periphery is sealed, and as a result, moves so as to press the inner wall of the flat portion 2. At this time, since the clearance C part is provided in the flat part 2 by the engagement of the holding tool 7, the content liquid L can push up the inner wall of the flat part 2. As a result, the opening 4 is opened and discharged from the bag body 1 to the outside.

Next, the sealing operation will be described. When the user stops pressing the pressing portion T of the bag body 1, the internal pressure of the bag body 1 stops increasing, and at the same time, the flat portion 2 is not pressed against the inner wall by the content liquid L. That is, the flat portion 2 tries to return to the original shape by the holding tool 7 when the content liquid L is no longer pressed, so that the flat portion 2 comes into a close contact state again.

  The other form for implementing this invention is demonstrated based on drawing. 5 to 9 show a second embodiment of the present invention. 5 and 6, the bag body 1 is provided with a flat portion 2 at one end, and an opening 4 is provided at an end portion 3 of the flat portion 2. Further, the periphery 5 and the end portion 6 of the bag body 1 have a sealed structure in which welding, bonding, or an integrated structure is formed. And the content liquid L is accommodated in the bag body 1. In this example, the periphery 5 has a sealed structure formed in a cylindrical shape, and the end portion 6 has a structure in which the content liquid L is filled in the bag body 1 and then welded and sealed. Further, a holding tool 21 is detachably attached to the flat portion 2 of the bag body 1.

  Next, the clamping tool 21 will be described with reference to FIGS. FIG. 7 is a perspective view of FIGS. 5 and 6. The clamping device 21 is provided with claw portions 22 that engage with both side portions 9 of the opening 4 with respect to the flat portion 2 of the bag body 1. The claw portions 22 are provided with a clearance C and face each other. The bottom 23 of the clamping tool 21 has a curved shape with the clearance C on the inner diameter side. Further, the bottom portion 23 is provided with a guide portion 24 having a tapered tip while maintaining the above-described curved shape so as to extend from the opening portion 4 of the bag body 1.

Next, the discharge operation will be described. The opening 4 of the bag body 1 is sealed by the claw portion 22 of the holding tool 21 so that both side portions 9 cannot be opened and closed. Further, the central portion 10 of the opening 4 can be opened and closed by a clearance C provided in the claw portion 22 of the holding tool 21, but normally the flat portion 2 is formed by a curved shape provided in the bottom 23 of the holding tool 21. Is deformed into a curved shape, and the flat portion 2 is in close contact with the inner wall. Here, when the user presses the pressing portion T of the bag body 1, the internal pressure of the bag body 1 increases, and the content liquid L moves to be discharged from the bag body 1. At this time, the content liquid L is prevented from moving by the bag body 1 whose periphery is sealed, and consequently moves so as to press the inner wall of the flat portion 2. Since the flat portion 2 is provided with a clearance C portion by the engagement of the holding tool 21, the content liquid L can push up the inner wall of the flat portion 2. Finally, the opening 4 is opened and the bag is opened. The content liquid L is discharged outward from the body 1.

Next, the sealing operation will be described. When the user stops pressing the pressing portion T of the bag body 1, the internal pressure of the bag body 1 stops increasing, and at the same time, the flat portion 2 is not pressed against the inner wall by the content liquid L. As a result, the flat portion 2 is bent in a certain direction by the holding tool 21 and tries to return to the shape of the base when the content liquid L is no longer pressed.

  Still another embodiment for carrying out the present invention will be described with reference to the drawings. 10 to 14 show a third embodiment of the present invention. 10 and 11, the bag body 1 is provided with a flat portion 2 at one end, and an opening 4 is provided at an end portion 3 of the flat portion 2. Further, the periphery 5 and the end portion 6 of the bag body 1 are welded, bonded, or have a hermetically sealed structure. And the content liquid L is accommodated in the bag body 1. Further, a holding tool 31 is detachably attached to the flat portion 2 of the bag body 1.

  Next, the clamping tool 31 will be described with reference to FIGS. FIG. 12 is a perspective view of FIGS. 10 and 11. The clamping tool in this example is composed of a wire-like member. The holding tool 31 is bent to the bottom side of the flat portion 2 and the arm portion 32 formed by bending upward so that both side portions 9 of the opening 4 are sandwiched between the flat portion 2 of the bag body 1. The jaws 33 formed in this manner are provided from the opening 4 toward the rear. The arms 32 are arranged in parallel with each other with a clearance C provided. Further, the jaw 33 of the holding tool 31 has a curved shape with the clearance C on the inner diameter side.

Next, the discharge operation will be described. The opening 4 of the bag body 1 is sealed by the arm portion 32 of the holding tool 31 so that both side portions 9 cannot be opened and closed. Further, the central portion 10 of the opening 4 can be opened and closed by a clearance C provided in the arm portion 32 of the holding tool 31, but is usually flat due to the curved shape provided in the jaw portion 33 of the holding tool 31. The portion 2 is deformed into a curved shape, and the inner wall is in close contact. Here, when the user presses the pressing portion T of the bag body 1, the internal pressure of the bag body 1 increases, and the content liquid L moves to discharge from the bag body 1. At this time, the content liquid L is prevented from moving by the bag body 1 whose periphery is sealed, and consequently moves so as to press the inner wall of the flat portion 2. Further, since the clearance C part is provided in the flat part 2 by the engagement of the holding tool 31, it is possible for the content liquid L to push up the inner wall of the flat part 2, and the opening 4 is opened to remove the bag 1. It is discharged outward.

Next, the sealing operation will be described. When the user stops pressing the pressing portion T of the bag body 1, the internal pressure of the bag body 1 stops increasing, and at the same time, the flat portion 2 is not pressed against the inner wall by the content liquid L. As a result, the flat portion 2 is curved in a certain direction by the holding tool 31 and tries to return to the shape of the base when the content liquid L is no longer pressed.

  Still another embodiment for carrying out the present invention will be described with reference to the drawings. 15 to 19 show a fourth embodiment of the present invention. 15 and 16, the bag body 1 is provided with a flat portion 2 at one end, and an opening 4 is provided at an end portion 3 of the flat portion 2. Further, the periphery 5 and the end portion 6 of the bag body 1 have a sealed structure in which welding, bonding, or an integrated structure is formed. And the content liquid L is accommodated in the bag body 1. A cylindrical holding tool 41 is detachably attached to the flat portion 2 of the bag body 1.

  Next, the cylindrical holding tool 41 will be described with reference to FIGS. FIG. 17 is a perspective view of FIGS. 15 and 16. The inner diameter S of the cylindrical holding tool 41 is set to be smaller than the width of both side portions 9 of the flat portion 2 formed in the bag body 1. Further, the cylindrical holding tool 41 is provided with a notch portion 42, and the arm portion 43 is bent toward the inner diameter side thereof. Further, a pressing portion 44 that is warped to the opposite side to the bent side is provided at the tip of the arm portion 43. A protruding portion 45 protruding toward the opening 4 is formed on the side facing the arm portion 43 of the cylindrical holding tool 41.

  The cylindrical holding tool 41 is mounted by being rolled so as to wrap the flat portion 2 of the bag body 1 on the inner diameter side thereof. On the other hand, the arm part 43 of the cylindrical holding tool 41 presses the flat part 2 of the bag body 1 from one side.

Next, the discharge operation will be described. Since the flat part 2 of the bag body 1 is curved by a cylindrical holding tool 41 smaller than the width of the both side parts 9, the inner wall thereof is in close contact. Further, the central portion 10 of the opening 4 of the bag body 1 is pressed by the arm portion 43 of the cylindrical holding tool 41. Moreover, the both sides vicinity of the center part 10 pressed by the said arm part 43 has a space upward, and can be opened and closed freely. Here, when the user presses the pressing portion T of the bag body 1, the internal pressure of the bag body 1 increases, and the content liquid L moves to discharge from the bag body 1. At this time, the content liquid L is prevented from moving by the bag body 1 whose periphery is sealed, and consequently moves so as to press the inner wall of the flat portion 2. Further, the flat part 2 is pressed against the central part 10 by the arm part 43 of the holding tool 41, but both sides of the central part 10 can be opened and closed with a space above, so that the content liquid L can push up the inner wall of the flat portion 2, and the push-up action opens the opening 4, and the content liquid 1 is discharged outward from the bag body 1.

  Next, the sealing operation will be described. When the user stops pressing the pressing portion T of the bag body 1, the internal pressure of the bag body 1 stops increasing, and at the same time, the flat portion 2 is not pressed against the inner wall by the content liquid L. As a result, the flat portion 2 is bent in a certain direction by the holding tool 41 and tries to return to the shape of the base when the content liquid L is no longer pressed.

  Still another embodiment for carrying out the present invention will be described with reference to the drawings. 20 to 22 show a fifth embodiment of the present invention. In this example, the bag body and operation are the same as those described above. In FIG. 20, a holding tool 51 is detachably attached to the flat portion 2 of the bag body 1. The holding tool 51 is formed with a projecting portion 52 in a conical shape or a pyramid shape that gradually decreases in width from the holding tool 51 side toward the inner diameter of the opening 4. In addition, the projection part 45 is similarly formed in the cone shape or the pyramid shape also in the cylindrical holding tool 41 shown in above-mentioned FIG. The protrusion 52 (protrusion 45) is inserted so as to slightly push the end 3 of the opening 4.

  The bag 1 is always in close contact with the flat portion 2 to the opening 4 in a sealed state. The capillarity of the content liquid L occurs in the intimate part, and the content liquid L is guided to the end 3 of the intimate part. Thus, when the end 3 of the opening 4 is slightly expanded, the contact portion is also molded only to the front end that is slightly expanded.

By keeping in such a state, the content liquid L is not guided to the opening 4, and as a result, the content liquid L adheres to the surroundings, or dirt is attached to the opening 4. Can be prevented.

  Further, although not shown, the end portion 3 of the opening 4 of the bag body 1 may be subjected to a surface treatment that provides a water repellent effect. The close contact of the end 3 of the opening 4 is prevented. That is, since the end portion 3 has a water repellent effect, the capillary action of the content liquid L can be prevented, and the above-described effects can be obtained.

DESCRIPTION OF SYMBOLS 1 Bag body 2 Flat part 3 End part 4 Opening part 5 Perimeter 6 End part 7 Clamping tool 8 Claw part 9 Both side part 10 Center part 21 Clamping tool 22 Claw part 23 Bottom part 24 Guide part 31 Clamping tool 32 Arm part 33 Jaw part 41 Clamping tool 42 Notch 43 Arm part 44 Pressing part 45 Projection part 51 Clamping tool 52 Projection part L Content liquid T Pressing part C Clearance

Claims (4)

A holding tool for holding an opening of a bag body so as to be openable and closable, the holding tool having a holding part for pressing the surface of the bag body and a non-holding part. The clamping tool according to claim 1, wherein the opening of the bag is clamped in a state where the opening is curved in a direction orthogonal to the opening. The holding tool according to claim 1 or 2, wherein a protrusion is formed at a tip of the holding portion, and the protrusion is buried in a tip of the opening. The holding tool according to any one of claims 1 to 3, wherein a release layer is provided on an inner surface of the flat opening.

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