JP3989365B2 - Inner bag for containers. - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an inner bag for a container made of a resin film such as polyethylene film and a rubber sheet used in a container for liquid, and particularly for a container in which a plastic discharge body is attached to a hole for discharging liquid in the inner bag. It relates to the inner bag.
[0002]
[Prior art]
The liquid container includes a liquid storage chamber and a discharge pipe that is connected to the bottom of the storage chamber and connected to a pump for discharging the liquid in the storage chamber to the outside. Along the inner wall of the accommodation chamber, an inner bag for a container molded in a cylindrical shape with plastic is accommodated. This container inner bag is composed of a tube made of a plastic sheet, and a discharge body that is attached to the end of the tube and protrudes outward from the end of the tube so that a small-diameter cylindrical portion is connected to the pouring tube. ing.
[0003]
The container for liquid needs to wash the filled contents remaining in the container every time the product type is changed or every time it is used. Since the washing cost is high, a container inner bag processed with a plastic tube is used in the container. Insertion and use are increasing. This container inner bag is processed into a shape that matches the inside of the container with a plastic tube, and a discharge body molded with plastic is attached to the end, and it is attached to the inner bag at the container outlet before filling the product. After installing the discharger, it is filled with liquid, and after transportation and storage, it is discharged into a predetermined tank using a pump or the like.
[0004]
In this type of liquid container, a container inner bag is used in which a plastic discharger is attached to the liquid discharge hole of the inner bag. (For example, see Patent Document 1)
[0005]
[Patent Document 1]
Japanese Patent Laid-Open No. 2000-43882 [0006]
The container-inner bag described in Patent Document 1 (Japanese Patent Laid-Open No. 2000-43982) will be described with reference to FIGS. FIG. 3 is a partially cutaway front view showing a state in which the upper open type inner bag 104A made of an elastic low-density polyethylene sheet or the like is mounted in the middle container 101 with the upper lids 102A and 102B. The bottom end of the tube (cylindrical sheet) set in accordance with the inner peripheral length of the portion 102a is sealed 105 in a reverse radial direction toward the container lower mouth portion 102c by heat fusion or the like to form the bottom 104a; and An opening 106 is provided in a portion corresponding to the lower mouth portion 102c of the container 102, and a discharge body 107 (insertion socket) separately molded into a cylindrical shape with plastic is inserted so that a part of the cylindrical portion at the tip of the discharge body 107 is inserted. Projects from the tube end to the outside. Further, the container 102 is accompanied by an extraction pipe 114.
[0007]
FIG. 4 is a partially enlarged view of this discharge body 107. The discharge body 107 is provided with a circumferential convex portion 107a on the outer peripheral portion, and the outer diameter of the convex portion 107a is provided on the plus side from the inner diameter of the lower mouth portion 102c. Because it is formed, it is press-fitted into the inner diameter of the lower mouth part 102c in a state of being tightly covered while being expanded to the circumferential convex part 107a part of the discharger 107 by the elasticity of the sheet itself of the bottom opening 106 part of the inner bag 104A, Since the opening 106 of the inner bag 104A, the discharger 107, and the container lower mouth part 102c are closely fitted and set, the liquid filled in the inner bag 104A enters the container 102 from the lower mouth part 102c. It is possible to prevent the inflow of water. The inner bag 104A can be set in the container 102 by inserting the discharge body 107 into the hole 106 in advance and tightly covering it, and press-fitting into the container lower opening 102c with a mounting jig (not shown). Alternatively, the discharge body 107 and the opening 106 can be temporarily aligned with a mounting jig (not shown) outside the container 102 and can be set by strongly press-fitting into the lower opening 102c.
[0008]
Therefore, the inner bag 104A can be mounted in the container 102 by utilizing the elasticity of the material, and the opening 106 of the inner bag 104 may be provided at an arbitrary position corresponding to the container lower opening 102c. By providing, it can be mounted on the seal line 105. Further, the container 102 is accompanied by a bottom portion 102b and an extraction pipe 114. Further, the inner bag 104 can be taken out after discharging the liquid by bundling the trunk sheet from the upper part of the container and pulling it out strongly, or by pulling out the remaining liquid from the inside with the mounting jig 108. In addition, in the attachment part of the discharger 107 arranged by imposition in the tube, a thin part and a part having a thickness are alternately formed in a ring shape at a constant angular interval, and the parts having these thicknesses Is provided as a suction weir 107b for the inner bag sheet.
[0009]
[Problems to be solved by the invention]
However, in the case of a conventional container inner bag, when the discharge body is not attached to the center position of the end of the tube (inner bag sheet), in the process of discharging the liquid inside the container in the case of viscous liquid, The prevention dam 107b, which is bent at the periphery of the suction prevention dam 107b and alternately forms a thin part and a thick part in a ring shape at regular angular intervals, does not function sufficiently, and the tube completely discharges the discharge port during discharge The internal viscous liquid cannot be discharged due to blockage, or the tube is blocked by a part of the discharge port, and the internal viscous liquid cannot be discharged sufficiently.
[0010]
The present invention has been proposed to solve the above problems, and provides an inner bag for a container to which a discharge body having a structure in which the tube does not block the discharge port in the process of discharging the liquid inside the container. With the goal.
[0011]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention according to claim 1 is a liquid container having a lower mouth part provided at the bottom, and a pump connected to the lower mouth part for pouring the liquid in the container to the outside. An inner bag for a container, which is accommodated along the inner wall of the container for a liquid container having an outlet pipe connected to the container, and is made of a plastic sheet and has an opening at the end corresponding to the lower mouth And a discharge body that is attached to the end of the tube and has a small-diameter cylindrical portion inserted into the lower mouth portion and projecting downward from the tube end in order to connect to the extraction pipe, The discharge body is bonded or thermally welded to the inner periphery of the opening of the tube and is attached to the end of the tube, and the small-diameter cylindrical portion is provided downward on the inner periphery and protrudes downward from the opening of the tube ; The ring Upward is provided on the outer periphery of the plate, and has an outer peripheral surface for passing the liquid consists of a flange tube disposed within said tube, said flange barrel, numerous vertical elongated hole is at a distance in column It is an inner bag for containers characterized by being formed with a ladder-shaped cylindrical frame provided.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
DETAILED DESCRIPTION Hereinafter, a detailed description will be given with reference to the drawings illustrating embodiments according to the present invention. FIG. 1 is a schematic cross-sectional view showing a state where an upper open type inner bag 4A is attached to a 1-ton class liquid container according to the present invention, and FIG. 2 is an enlarged view of a discharger mounting portion of FIG.
[0013]
1 and 2, FIG. 1 shows a state in which an upper open type inner bag 4A made of a tube or the like molded into a cylindrical shape with a synthetic resin sheet such as polyethylene is mounted in a container 2 of a liquid container 1. FIG. In the schematic front view, the bottom portion 3a is set so that the lower end portion of the tube (tubular sheet) 3 set in accordance with the inner peripheral length of the body portion 2a of the container 2 is aligned with the bottom that is lowered toward the center of the container by heat fusion or the like. The bottom 5a is formed by sealing 5 in the opposite radial direction toward the lower mouth 2c, and an opening 6 is provided in a portion corresponding to the lower mouth 2c of the container 2, and separately molded into a cylindrical shape with plastic. The discharger 7 is inserted, and a part of the small-diameter cylindrical portion 17 at the center of the tip of the discharger 7 protrudes outward from the end of the tube 3.
[0014]
The discharge body 7 includes a small-diameter cylindrical portion 17 projecting downward from the end of the tube 3 and a flange cylinder 27 having a diameter larger than that of the small-diameter cylindrical portion 17, and the small-diameter cylindrical portion 17 and the flange cylinder 27 are included in the annular plate 37. A small-diameter cylindrical portion 17 is provided downward on the circumference, a flange cylinder 27 is provided upward on the outer periphery of the annular plate 37, and the small-diameter cylindrical portion 17 and the flange cylinder 27 are integrally formed via the annular plate 37. The flange cylinder 27 has an outer peripheral wall surface 27 a provided with a long hole 28 a for allowing liquid to pass therethrough and is disposed in the tube 3. The small-diameter cylindrical portion 17 and the flange cylinder 27 are coaxial, and a plurality of flange step portions having different diameters are formed in the vertical direction on the outer periphery of the small-diameter cylindrical portion 17 protruding outward from the tube end. The flange step portion has a flange step portion 17a having a small diameter at the top and a flange step portion 17b having a large diameter at the bottom. And if the small diameter cylinder part 17 is inserted in the lower opening part 2c, it will be connected with the extraction pipe | tube 14 connected with the lower opening part 2c. In the example of FIG. 2, the outer peripheral wall surface of the flange sleeve 27 vertically long holes 28a, 28a, ... are provided many kept thick pillars 28b protruding outward than the wall surface, 28b, the interval ... ladder A cylindrical frame 28 is formed.
[0015]
When manufacturing the upper open type inner bag 4A, the discharger 7 is inserted into the opening 6 provided at the end of the tube 3, and a part of the small-diameter cylindrical portion 17 of the discharger 7 is externally connected from the end of the tube 3. To protrude. At this time, the annular plate 37 is bonded or thermally welded to the inner periphery of the opening 6 of the tube 3, and the discharge body 7 is attached to the end of the tube 3 to manufacture the inner bag 4 </ b> A.
[0016]
Moreover, in the small diameter cylinder part 17 which protrudes below from the terminal of the tube 3, since the large flange step part 17b provided under the small diameter cylinder part 17 is located in a front-end | tip part, it is used as it is when the diameter of the extraction pipe | tube 14 is large. However, when the diameter of the extraction pipe 14 is small, the small diameter cylindrical portion 17 is cut from the middle, the large flange step portion 17b provided below the small diameter cylindrical portion 17 is removed, and the small flange step portion provided above. 17a is positioned at the tip of the small diameter cylindrical portion 17. As described above, the small-diameter cylindrical portion 17 is cut and connected to the extraction pipe 14 as necessary depending on the diameter of the extraction pipe 14.
[0017]
When the inner bag 4A is mounted in the container 2 of the liquid container 1, even when the discharge body 7 is not attached to the central position of the end of the tube (inner bag sheet) 3 when the remaining amount of liquid is reduced. In the process of discharging the viscous liquid inside the container 1, even if the tube 3 is bent at the periphery of the discharge body 7, the flange cylinder 27 provided on the discharge body 7 forms a space in the inner bag 4A. Since the cylindrical frame 28 of the flange cylinder 27 is provided with a number of elongated holes 28a, 28a,... That allow liquid to pass therethrough, the tube 3 of the inner bag 4A does not block the discharge port. Further, the thick pillars 28b, 28b,... Projecting outward from the wall surface constitute a ladder-shaped cylindrical frame 28 with a space between the long holes 28a, 28a,. Even if the sheet is pressed, the ladder-like cylindrical frame 28 is not deformed, and the liquid can be discharged from the outer peripheral surface of the flange cylinder 27 to the end. The height of the thick pillars 28 b and 28 b of the ladder-like cylindrical frame 28 is set to about 0.5 to 2.5 times the diameter of the annular plate 37. Preferably, it is about 0.6 to 1.0 times. (For example, when the diameter of the annular plate 37 is 125 mmφ, the height of the thick pillars 28 b and 28 b is 300 mm.)
[0018]
When discharging the viscous liquid equipped with the inner bag 4A of the present invention, the discharge port is not blocked, and the discharge does not take a long time.
[0019]
【The invention's effect】
As described above, in the container inner bag of the present invention, in the process of discharging the viscous liquid inside the container, even if the tube is bent at the periphery of the discharge port, the flange cylinder provided in the discharge body is not in the tube. And the outer peripheral surface of the flange cylinder allows liquid to pass through. Further, since the outer peripheral surface through which the liquid passes is formed by a ladder-shaped cylindrical frame provided with a large number of vertically spaced long pillars that protrude outward from the wall surface, the tube blocks the discharge port. This eliminates the possibility that the liquid in the container equipped with the inner bag can be reliably discharged.
[Brief description of the drawings]
FIG. 1 is a schematic front view showing a state in which a top-open type inner bag according to the present invention is mounted on a liquid container.
FIG. 2 is an enlarged view of a discharger mounting portion of FIG.
FIG. 3 is a schematic front view showing a state in which a conventional upper-open type inner bag is attached to a liquid container.
4 is an enlarged view of a discharger mounting portion of FIG. 3. FIG.
[Explanation of symbols]
1, 101 Container 2A, 2B, 102A, 102B Upper lid 2, 102 Container 2a, 102a Body 2c, 102c Lower mouth 3 Tube (tubular sheet)
3a, 5a, 102b, 104a Bottom portion 4A, 104A Inner bag 5, 105 Seal 6, 106 Opening 7, 107 Ejector 14, 114 Outlet tube 17 Tube portion 17a, 17b Flange step portion 27 Flange tube 27a Outer wall surface 28 Cylindrical frame 28a long hole 28b pillar 37 annular plate 107a convex portion 107b prevention weir 108 mounting jig

Claims (1)

The liquid container comprising: a liquid container having a lower mouth portion provided at the bottom; and a dispensing pipe connected to the lower mouth portion and connected to a pump for pouring the liquid in the container to the outside. An inner bag for a container accommodated along the inner wall of the container,
A tube made of a plastic sheet and having an opening at the end corresponding to the lower mouth,
It is attached to the end of the tube, and a small-diameter cylindrical part is inserted into the lower mouth part and comprises a discharge body protruding downward from the end of the tube in order to connect with the extraction pipe,
The discharge body is bonded or thermally welded to the inner periphery of the opening of the tube and is attached to the end of the tube, and the small-diameter cylindrical portion is provided downward on the inner periphery and protrudes downward from the opening of the tube And a flange cylinder that is provided upward on the outer periphery of the annular plate and has an outer peripheral surface that allows liquid to pass through and is disposed in the tube. The flange cylinder has vertical slots spaced apart by columns. An inner bag for a container, characterized in that it is formed of a ladder-shaped cylindrical frame provided in a large number so as to maintain the same.

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