JP3212140U - Inner bag of flexible container - Google Patents

Abstract

To provide an inner bag of a flexible container that can smoothly draw out a discharge portion from an outer bag and that does not cause clogging of contents in the discharge portion. An inner bag (1) accommodated in an outer bag (3) of a flexible container, and a discharge portion (12) formed into a cylindrical shape having a reduced diameter from a main body portion (11) of the inner bag (1) when used, The bellows is folded so as to form a substantially Z shape in an orthogonal direction and is folded so as to form a substantially Z shape also in the cylinder axis direction, and the lower edge 123 of the folded discharge portion 12 is the discharge direction of the contents It is suitable for. [Selection] Figure 5

Description

  The present invention relates to an inner bag of a flexible container, and more particularly to an improvement in the structure of an inner bag provided with a discharge portion.

  Patent Document 1 shows an example of an inner bag for a flexible container (hereinafter referred to as a flexible container) provided with a discharge portion. The discharge portion of this type of inner bag has a diameter reduced from the lower end portion of the inner bag body and extends downward in a cylindrical shape. When the flexible container is transported, the inner bag is inserted into the outer bag, and at this time, the discharge portion is appropriately pushed into the bottom opening of the outer bag. Usually, the cylinder opening of the discharge part is closed by a flat seal, a ball seal, a folded seal or the like.

JP2007-223661

  By the way, when the contents are discharged, the cylindrical discharge portion of the inner bag is pulled downward from the bottom opening of the outer bag, but conventionally the discharge portion is simply pushed into the bottom opening of the outer bag. For this reason, it is difficult to pull out the discharge part out of the opening at the bottom, and the contents are clogged in the discharge part drawn out by twisting.

  Accordingly, the present invention solves such a problem, and provides an inner bag of a flexible container that can smoothly draw out the discharge portion from the outer bag and that does not cause clogging of contents in the discharge portion. For the purpose.

  In order to achieve the above object, the first device of the present invention is an inner bag (1) accommodated in an outer bag (3) of a flexible container, and is used from the main body (11) of the inner bag (1) when used. The discharge part (12) formed into a reduced diameter cylindrical shape is folded in a bellows shape so as to form a substantially Z shape at least once in the cylinder axis direction, and the folded discharge part (12) The outer end (123) faces in the direction of discharging the contents.

  According to the first device, when the contents in the main body portion of the inner bag are discharged, the discharge portion is not twisted by grasping and pulling the outer end of the discharge portion facing in the discharge direction. It can be easily and smoothly pulled out of the outer bag and restored to a cylindrical shape, and the contents can be quickly discharged without clogging or the like.

  In the second device, the outer end (123) of the discharge portion (12) protrudes by a predetermined amount in the discharge direction. According to the second device, the outer end can be easily grasped.

  In the third device, prior to the bellows folding in the cylinder axis direction, the discharge portion (12) is folded in a bellows shape so as to form a substantially Z shape at least once in a direction orthogonal to the cylinder axis. According to the third device, the discharge portion can be folded more compactly, and the unfolding from the folded state can be easily performed without causing a twist or the like.

  In the fourth device, the inner bag is provided with a filling portion formed in a cylindrical shape with a diameter reduced from the main body portion at a position opposite to the discharge portion via the inner bag. The bellows is folded and folded so as to form a substantially Z shape at least once in the axial direction, and the outer end of the folded filling portion faces the filling direction of the contents.

  According to the fourth device, when the contents are filled into the main body portion of the inner bag, the filling portion is not twisted by grasping and pulling the outer end of the filling portion facing in the filling direction. It can be easily and smoothly pulled out of the outer bag and restored to a cylindrical shape, and the contents can be filled quickly without causing clogging or the like.

  In the fifth device, the outer end of the filling portion protrudes by a predetermined amount in the filling direction. According to the second device, the outer end can be easily grasped.

  In the sixth device, the filling portion is folded in a bellows shape so as to form a substantially Z shape at least once in a direction orthogonal to the tube axis, prior to the bellows folding in the tube axis direction. According to the sixth device, the filling portion can be folded more compactly, and the unfolding from the folded state can be easily performed without causing a twist or the like.

  In the seventh device, the body portion (11) is folded in a bellows shape so as to form a substantially Z shape at least once in the depth direction, and the outer end (111) of the folded body portion (11) is folded. ) Is in the direction of filling the contents. According to the seventh device, the main body can be folded in a compact manner, and the main body can be easily unfolded from the folded state without causing twisting or the like.

  In the eighth device, prior to the bellows folding in the depth direction, the main body portion (11) is folded in a bellows shape so as to form a substantially Z shape at least once in the width direction. According to the eighth device, the main body can be folded more compactly, and the main body can be easily unfolded from the folded state without twisting.

  In addition, the code | symbol in the said parenthesis shows the correspondence with the specific means as described in embodiment mentioned later for reference.

  According to the inner bag of the flexible container of the present invention, the discharge part can be smoothly drawn out from the outer bag, and the contents are not clogged in the discharge part.

It is a whole perspective view of the inner bag which consists of a gusset bag. It is the whole inner bag perspective view which showed the fold line which folds a bellows. It is a whole perspective view of the inner bag which carried out the bellows folding of the main-body part and the discharge part. It is a whole perspective view of the inner bag which carried out the bellows folding of the discharge part. It is a whole perspective view of the inner bag accommodated in the outer bag.

  The embodiment described below is merely an example, and various design improvements made by those skilled in the art without departing from the gist of the present invention are also included in the scope of the present invention.

(First embodiment)
1 and the subsequent drawings show the process of housing the inner bag of the present invention in the outer bag of the flexible container. In FIG. 1, the inner bag 1 which consists of a well-known resin film gusset bag, such as polyethylene and a polypropylene, folded by folding both side edges inward is shown. The inner bag 1 is cut inward on both sides of the lower half and sealed by a known method, thereby forming an elongated discharge portion 12 following the main body portion 11 of the upper half.

  Such an inner bag 1 is enlarged and formed into a rectangular tube shape having a large-diameter upper half main body portion 11 and a discharge portion 12 that is reduced in diameter and extends downward by returning the folded portion outward. Can do. On the back surface of the discharge unit 12, an intermediate position of the bundling tape 2 serving as a bundling means is fixed by welding (shaded portion in the figure). In FIG. 1 and subsequent figures, the ratio of the vertical length of the main body portion 11 and the length of the discharge portion 12 is drawn differently from the actual one for easy understanding.

  The body portion 11 and the discharge portion 12 of the inner bag 1 folded as shown in FIG. 1 are further folded by being bellows folded into a substantially Z shape along the chain lines a1, a2, A, and B shown in FIG. That is, in FIG. 2, chain lines a1 and A indicate fold lines toward the front of the page, and chain lines b1 and B indicate fold lines toward the rear of the page. Along the folding lines a1, a2, A, and B, the main body portion 11 is folded in the vertical direction (that is, the depth direction) in FIG. 1, and the discharge portion 12 is folded in the left-right direction in FIG. Folded in the direction of The interval d1 between the fold lines a1 and b1 in the discharge unit 12 is substantially equal to the intervals d2 and d3 between the fold lines a1 and b1 and the side edges 121 and 122 of the discharge unit 12. Further, the interval d4 between the fold lines A and B in the main body 11 is slightly smaller than the interval d5 between the fold line B and the main body upper edge 111.

  FIG. 3 shows the inner bag 1 in which the main body portion 11 and the discharge portion 12 are bellow-folded along the fold lines a1, b1, A, and B. In the discharge portion 12, the bent portions are overlapped with substantially the same width. On the other hand, in the main body 11, the upper edge (outer end) 111 of the outermost portion 112 among the bent portions protrudes upward from the other portions.

  The discharge portion 12 folded in a substantially Z-shape in the left-right direction is further folded in a substantially Z-shape along the folding lines a2 and b2 in FIG. That is, in FIG. 3, a chain line a2 indicates a fold line toward the front of the paper, and a chain line b2 indicates a fold line toward the rear of the paper. The discharge portion 12 is folded in the vertical direction (that is, the cylinder axis direction) in FIG. 3 along the fold lines a2 and b2. The interval d6 between the fold lines a2 and b2 in the discharge portion 12 is slightly smaller than the interval d7 between the fold line b2 and the discharge portion lower edge 123.

  FIG. 4 shows the inner bag 1 in which the discharge part 12 is bellows folded in the cylinder axis direction. Of the bent portions of the discharge portion 12, the lower edge (outer end) 123 of the outermost portion 124 protrudes downward from the other portions. The bellows-folded discharge portion 12 is bound and held by the binding tape 2 as shown in FIG. 5, and is housed in a known outer bag 3 in this state as shown. The outer bag 3 shown in FIG. 5 is a rectangular box that opens upward, and a circular opening / closing outlet 31 is provided at the center of the bottom surface. Of course, the outer bag 3 may be a circular box. In a state where the inner bag 1 is housed in the outer bag 3, both end portions 22 and 23 extending from the binding portion 21 of the binding tape 2 are connected to a connection portion (not shown) provided on the inner surface of the outer bag 3. As a result, the inner bag 1 can be stably held in the outer bag 3.

  When the flexible container is used, the outer bag 3 is positioned by a suspension belt (not shown) provided on the outer bag 3, and then the upper edge 111 of the main body 11 of the inner bag 1 is grasped and pulled upward, and the gusset is folded. The main body 11 is enlarged and formed into a rectangular tube shape that opens upward along the inner surface of the outer bag 3 by returning the outer portion to the outside, and the contents are put into the inner bag 1. Then, the upper opening of the outer bag 3 and the inner bag 2 is closed and conveyed by a known method. Then, after the conveyance, the discharge port 31 of the outer bag 3 is opened and the binding tape 2 is unbound or cut so that the lower edge 123 of the discharge portion 12 of the inner bag 1 is connected to the discharge port 31. Then pull it down.

  Since the drawn-out discharge portion 12 is folded in a bellows direction in a direction perpendicular to the cylinder axis as described above (see FIG. 3), this is unfolded again (state in FIG. 2), and the gusset is further folded. By returning the portion to the outside, it is enlarged and formed into a cylindrical shape that expands to the full outlet 31 of the outer bag 3. Thereby, the contents in the main body 11 are smoothly discharged downward through the discharge part 12.

(Other embodiments)
Although the case where this invention was applied to the gusset bag was demonstrated in the said 1st Embodiment, it can apply also to what is called a flat bag without a fold.
In the first embodiment, in order to make the folded state more compact, the discharge portion is bellows folded in the direction perpendicular to the cylinder axis direction and then bellows folded in the cylinder axis direction. The effect of the present invention can be obtained by just doing.
Moreover, in the said 1st Embodiment, although the main-body part was only bellows folded in the up-and-down depth direction, you may make it bellows-fold in the depth direction after folding a bellows in the left-right direction. Alternatively, the main body portion does not have to be particularly folded.
Instead of the binding tape in the first embodiment, a binding string or the like may be used. Alternatively, the folded state of the discharge portion may be maintained by partial welding or the like.
In the first embodiment, the bellows is folded once so as to form a Z shape, but may be folded several times.
The present invention can also be applied to the filling portion in a so-called bottle-shaped inner bag in which a cylindrical filling portion having a reduced diameter is formed on the upper portion of the main body portion.

DESCRIPTION OF SYMBOLS 1 ... Inner bag, 11 ... Main-body part, 111 ... Upper edge (outer end), 12 ... Discharge part, 123 ... Lower edge (outer end), 2 ... Binding tape (binding means), 3 ... Outer bag.

Claims (8)

An inner bag housed in an outer bag of a flexible container, and a discharge portion formed into a cylindrical shape having a reduced diameter from the main body portion of the inner bag at the time of use forms a substantially Z shape at least once in the cylinder axis direction. The inner bag of the flexible container in which the outer end of the folded discharge portion is oriented in the discharge direction of the contents. The inner bag of the flexible container according to claim 1, wherein an outer end of the discharge portion protrudes by a predetermined amount in the discharge direction. 3. The flexible container according to claim 1, wherein the discharge portion is folded in a bellows shape so as to form a substantially Z shape at least once in a direction orthogonal to the cylinder axis prior to the bellows folding in the cylinder axis direction. Inner bag. The inner bag is provided with a filling portion formed in a cylindrical shape having a diameter reduced from the main body portion at a position opposite to the discharge portion via the inner bag, and the filling portion is at least once in the cylinder axis direction. The inner bag of the flexible container according to any one of claims 1 to 3, wherein the outer end of the folded filling portion is folded in a bellows shape so as to form a substantially Z shape, and the outer end of the folded filling portion faces the filling direction of the contents. The inner bag of the flexible container according to claim 4, wherein an outer end of the filling portion projects a predetermined amount in the filling direction. 6. The flexible container according to claim 4, wherein the filling portion is folded in a bellows shape so as to form a substantially Z shape at least once in a direction orthogonal to the cylinder axis prior to the bellows folding in the cylinder axis direction. Inner bag. The main body is folded in a bellows shape so as to form a substantially Z shape at least once in the depth direction, and the outer end of the folded main body faces the filling direction of the contents. The inner bag of the flexible container as described in any one of 3. The inner bag of the flexible container according to claim 7, wherein the main body portion is folded in a bellows shape so as to form a substantially Z shape at least once in the width direction prior to the bellows folding in the depth direction.

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