JPH08295350A - Multiple layer type flexible container - Google Patents

Abstract

PURPOSE: To provide a multiple layer type flexible container which can ensure safety at the time of transport, is superior in resource saving, environmental protection and economy, and in addition, can facilitate the taking out of a content. CONSTITUTION: A multiple layer type flexible container consists of an internal bag and an external bag which has a handle for hanging on the top and a take out port of a content in the internal bag, on the bottom. The internal bag is an internal bag containing a content as shown in (a), and consists of a cylindrical body 1 which is formed of a fabric of a polypropylene fiber, and the bottom of which is tied with a string 5. The internal bag is placed and carried in the external bag. The external bag has the handle, and for which string-form or mesh-form raw materials are bundled and knitted so that the external bag may have a strength being stronger than the internal bag, which can withstand the the weight of a cement product, which is the content, or an impact load at the time of charging or transport, etc. The bottom shape of the external bag is square, and the external bag has a take-out port at the central part so that the content in the internal bag can be taken out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-layer flexible container, and more particularly to a multi-layer flexible container which has an outer bag capable of reinforcing an inner bag and can be safely transported.

[0002]

2. Description of the Related Art Flexible containers are made of powder, fluid,
It consists of a bag for carrying large amounts of heavy objects such as viscous materials,
The specifications are required to have good adhesion and strength, and to be highly safe during transportation. Especially when transporting cement products etc. using flexible containers, there are currently one-use type (running type) and multiple-use types (running type), and these flexible containers are made of polypropylene fiber or the like. The polypropylene fiber bag has sufficient strength to support the heavy weight as described above.

[0003]

However, in most of the flexible containers as described above, not only does the bag reduce the pain and strength when a heavy object is conveyed once, but also the holes are opened due to stains or impact during transportation. In fact, most of them are actually disposed of after a single use because they are torn or torn. Therefore, a single-use type is used in which the container is thrown away once it is used due to damage or contamination of the container. Then, as the method of disposing of this used flexible container, there is no choice but to incinerate or landfill, and in the case of incineration, the weight of this flexible container is about 2.
Since there is also 5 kg / bag, there is a problem that a high temperature and a large amount of graphite are generated if it is burned as it is, so that a special incinerator having a high temperature countermeasure is required. In addition, when the used flexible container is disposed of in the landfill, the fibers that make up the flexible container are synthetic fibers such as polypropylene, so it is difficult to corrode in the natural world, and after the landfill, a space is created in the soil and the formation is unstable. There is a problem that
Therefore, the disposal sites are limited and there are only those allowed in future land use plans, etc. In any case, these disposal methods are expensive and have many problems.

Therefore, the inventors of the present invention have made various studies on the above-mentioned problems from the viewpoints of ensuring safety during transportation and saving resources, protecting the environment and economical efficiency. It is ideal if the bag has a structure and can be used a plurality of times, but in consideration of problems of damage and stain, it is preferable to use a single-use type inner bag. As a result, the inner bag is protected by the outer bag, so that the condition of the inner bag is that the airtightness is the first function. This means that it is possible to select a lightweight and inexpensive material for the inner bag, so the weight of the inner bag is smaller than the conventional flexible container at the time of disposal, so not only the disposal cost is low, but also secondary pollution is less likely to occur. It has been found to have advantages.
The present invention has been made based on this finding. Therefore, the problem to be solved by the present invention is to provide a multi-layer flexible container in which safety during transportation is ensured, resource saving, environmental protection and economy are excellent, and contents can be easily taken out. It is in.

[0005]

The problems to be solved by the present invention are achieved by the following inventions. (1) A multi-layered flexible container comprising an inner bag, a hanging handle at the top, and an outer bag having a take-out port for the contents of the inner bag at the bottom. (2) The multi-layer flexible container as described in the above item 1, wherein the inner bag has a portion for taking out contents at the bottom. (3) The inner bag is formed of a tubular body, and the upper opening part can be bound and the lower extraction part is tied so that it can be opened with a string. Multi-layer flexible container. (4) The multilayer flexible container according to any one of items 1 to 3, wherein the outlet of the outer bag is a circular or square hole. (5) The multi-layer flexible container according to any one of the above items 1 to 3, wherein the seam of the outer bag is wrapped in a spiral shape. (6) The multilayer flexible container according to any one of items 1 to 5, wherein the hanging handle of the outer bag is woven by bundling vertical strings. (7) The multi-layer flexible container according to any one of items 1 to 6, wherein the outer bag has a mesh size of 50 mm □ or less.

The present invention will be described in more detail below. The multi-layer flexible container of the present invention comprises an inner bag, a hanging handle at the top, and an outer bag having an outlet for the contents of the inner bag at the bottom. In particular, it is characterized by comprising an inner bag having a contents take-out portion at the bottom, a hanging handle at the top, and an outer bag having a take-out port for the contents of the inner bag at the bottom. Preferably, the outer bag has a function of supporting the weight of the inner bag filled with the contents, and the inner bag is intended to hold the contents, and is further sealed to prevent the contents from scattering and leaking. It has a function to obtain. In the present invention, the inner bag is formed by using paper (Japanese paper, fertilizer bag, rice bag, etc.), sheet-like cotton woven fabric, and a sheet in which chemical fibers such as polyester, nylon, tetron, and vinyl chloride are woven. Further, the outer bag has a strength that can withstand the weight of the contents and an impact load when packed or transported than the inner bag 1, and
A shape and material that can withstand long-term use are selected. As such a material, one kind or two or more kinds of fibers having a certain strength such as steel, shape memory alloy, metallic wire such as superelasticity, cotton fiber, carbon fiber, polyester fiber, nylon fiber and the like are combined. The produced string-shaped body or band-shaped body is knitted to form a cloth-like or net-like bag. In the case of a reticulated bag, the mesh is preferably 50 mm □ or less, and more preferably 15 mm □ to 40 mm □. Within this range, it is possible to prevent the holes from being opened or torn due to an impact when the inner bag is transported. Here, mm □ is a unit representing the mesh size and is used in the ordinary meaning, and may be represented by 1 mm × 1 mm or mm ² .

The inner bag used in the present invention is preferably made of a tubular body, and the upper opening of the tubular body can be bound with a string or the like near the opening, and after the contents are put in the bag. , Bind the contents to prevent them from protruding or being exposed and scattered by the pressure of their weight. The string used for this binding may not be fixed to the inner bag or may be fixed. When fixing, it is preferable that the left and right strings have the same length. On the other hand, the lower part of the tubular body
Sew it with a sewing machine or glue it with glue. When you take out the contents from the bag, you can cut out the bottom with a knife or sickle and take out. If the tubular body has a take-out portion at the bottom, the take-out portion is tied so that it can be opened with a cord, and the cord used for this binding is not fixed to the inner bag or is fixed. It is good, but it is better to be fixed for use. When fixing with a lower string of a tubular body that is an inner bag, the length of the string may be the same length by fixing the central part of the string, or one string may be longer than the fixing part of the string. But,
Preferably, the length of the cord is fixed so that one of the cords becomes long, and the longer cord is exposed to the outside through the opening of the outer bag. Furthermore, the method of tying so that it can be released with a string is a single knot or a flower knot, so that one of the strings can be easily unwound by pulling.

The contents take-out port in the lower part of the inner bag used in the present invention is not only a method of tying the lower part but also a method of sewing the lower part of the inner bag with a sewing machine as shown in the perspective view of FIG.
In this method, the bottom of the inner bag is sewn with a lock sewing machine or the like to close it. The sewing method is preferably chain stitch, which is usually used when a powder product is packed in a bag and then sewn with a sewing machine. As shown in the perspective view of FIG. 6b, a method of tying the ends of the inner bag with a string, a method of rolling the lower part and sandwiching it from both sides, a method of using a fastener at the lower end, and sewing with a sewing machine There are various methods such as a method of doing and a magic tape. In the outer bag used in the present invention, the materials at the bottom are overlapped at the center, and a circular or rectangular hole is provided at the bottom, so that the string that binds the lower part of the inner bag can be taken out therefrom.

[0009]

In the present invention, since the inner bag is protected by the outer bag, not only can the inner bag be made of a lightweight and inexpensive material suitable for one-time use, but this also saves resources and reduces secondary pollution. To do. Since the inner bag is protected by the outer bag, the number of times the same inner bag is used can be increased. Further, since the take-out portion of the inner bag is bound by the string so as to be opened, the take-out portion of the inner bag is immediately opened by pulling the string through the take-out port of the outer bag. Furthermore, since the material of the outer bag is a string-shaped body or a band-shaped body having a certain strength, it can be used for a long period of time. In particular, the one woven with a string-shaped body or a band-shaped body combined with a metal wire such as steel, a shape memory alloy, or superelasticity retains the shape as it is, so it is possible to put the inner bag containing the contents in the outer bag. You can easily.

[0010]

EXAMPLES The present invention will now be described in more detail with reference to examples, but the present invention is not limited to these examples.

EXAMPLE FIG. 1 is a perspective view showing an inner bag which constitutes the multilayer flexible container of the present invention, and FIG. 2 is a perspective view showing an outer bag in which the inner bag is put. FIG. 1a shows an inner bag containing the contents. First, as shown in FIG. 3, the inner bag 1 shown in FIG. 1 is made up of a tubular body 11 formed of a polypropylene fiber cloth.
It is fixed by sewing with No. 3. The lower part is then tied, as shown in FIG. FIG. 4 shows a binding state of the lower part of the inner bag 1, and FIG. 4A shows an example of a flower knot, which is tied so that it can be untied when the long string 52 is pulled. 4b is a single knot, which is also a long string 5
Pull 2 to solve. In FIG. 1 b, the inner bag 1 is a paper bag, the bottom of which is adhered and sealed with an adhesive, and after the contents are put in, the top is sealed with the adhesive. This seal may be sewn with an adhesive instead of a sewing machine. After transporting in an outer bag, take out the contents by cutting the bottom with a sickle.

On the other hand, the outer bag 2 shown in FIG. 2 is more durable than the inner bag 1 so as to withstand the weight and impact load of the cement product, which is the content, when it is packed or transported.
It is a braided or braided string-like or net-like material, and the mesh size is 50 mm □. In this example, a steel wire and a polyester fiber are used as the materials for braiding.
The mesh size of the outer bag is 15 mm □, 30 mm □,
40 mm □ was used. In FIG. 2, the seams 9 and 10 at the side and bottom ends of the bag are formed by spirally bending with a string so that the side surface of the bag becomes angular after the contents are packed. Therefore, the bottom portion 6 has a rectangular shape. Furthermore, FIG.
As shown in the sectional view of the bottom part in Fig. 5, in Fig. 5a, the bottom part 6 has a structure in which two nets (cloths) are overlapped in the vicinity of the center part, thereby tying the lower part of the inner bag from here. The cord 52 is taken out and pulled, the binding portion is released, and the contents are taken out. The bottom net (cloth) preferably has a smaller mesh size than the side net (cloth).

In addition to the above, as the structure of the bottom portion 6, FIG.
Then, the hole 12 is formed in a circular shape, and a string is bent along the circumference. Further, as shown in FIG. 5c, the rectangular hole 13 is bent around the periphery with a string. These holes 12 and 13 are of a size that can sufficiently support the inner bag 1 and can be quickly taken out when the contents are taken out, and the size is appropriately determined. Furthermore, it is preferable that the rectangular hole 13 be stopped by a band (for example, a polypropylene band) 56 along the longitudinal direction so that the inner bag 1 can be sufficiently supported. 6A, the bottom portion 6 of the inner bag 1 is sewn with a sewing machine and closed.
16 is a perforation. In this method, the inner bag bottom portion 6 is sewn and closed by a lock sewing machine or the like. The sewing method is preferably chain stitch, which is usually used when a powder product is packed in a bag and then sewn with a sewing machine. To take out the contents from this inner bag 1,
One sewing machine thread is pulled from one end of the inner bag bottom portion 6 to release the sewing thread to the other end, and the bottom portion 6 is opened. Both ends of the sewing machine thread to be pulled out are made slightly longer so as not to be unintentionally loosened, and preferably fixed to an inner bag or an outer bag with tape or the like.

In FIG. 6b, the binding is a little complicated, but
With a method that can be tied easily with two strings, first squeeze while bending the bottom ends 61 and 62 of the inner bag 1 from the outside to the inside, and bundle one thick string 54 into the narrowed mouth and insert it. . At this time, the end 54a of the string used when opening the bottom of the inner bag 1 is lengthened, and the end 54a is fixed to the inner bag or the outer bag with an adhesive tape 57 or the like. Then, the other end 54b is formed into a ring and bundled into the inner bag. The number of times the strings 54b are bundled is 2.5 times or more, that is, it is necessary that the number of strings is 5 or more. In this way, the string 54c bundled with the inner bag end is bound with the thin string 55 at the inner portion of the bottom. At this time, the thin string 55 is passed through the loop of the knot formed at the end of the thick string 54 (in other words, one of the thin strings 55 is tied at the end of the thick string 54). This method requires two strings, but when tied with only one, the inner end does not go out and the contents do not release when the withdrawal side string is pulled.

FIG. 6c shows an inner bag provided with a string on the lower part, and the string is fixed (53) at an appropriate position on the lower part of the inner bag 1,
Set the left and right strings one short (51) and the other (52) a little longer. The inner bag 1 is formed by bending the bottom portion and then squeezing and binding, or by squeezing and binding. The way to tie it may be a flower knot or a single knot, but the string is code 5.
Tie a little longer than the string 51 as shown by 2. 6d is an inner bag having two separate strings provided on the lower part thereof. The string 51 is fixed to the lower part of the inner bag 1 (53), and the string 52 is fixed to the opposite part of the string 51 ( 53) and one is short (5
1), the other is lengthened (52). The inner bag 1 is rounded at the bottom and then tied in a flower knot or a single knot with strings 51 and 52.
FIG. 6e shows an inner bag having eyelets at the bottom, and eyelets 58 are appropriately provided at the bottom of the inner bag 1. After passing the string 52 through the eyelets 58, the eyelet 58 is squeezed and then tied with a flower knot or a single knot. The inner bag 1 thus configured is put into the outer bag 2 and then transported (see FIG. 10). At this time, the inner bag 1 has a size slightly larger than the inner volume of the outer bag 2 to prevent the contents from bursting under the pressure of its weight. The seams at the side and bottom ends of the bag are designated by reference numeral 15 as shown in FIGS.
It is preferable that the wire be spirally wound to have strength as shown in FIG.

[0016]

In the multilayer flexible container of the present invention, the inner bag is protected by the outer bag, so that the number of times of using the same inner bag can be increased and it is economical. Disposal costs and secondary pollution are low even if they are single-use disposable items due to damage or contamination. Further, since the take-out portion of the inner bag is bound with the string so as to be openable, the take-out portion of the inner bag is immediately opened by pulling the string through the take-out port of the outer bag, and the carried contents can be taken out easily. Furthermore, since the material of the outer bag is a string-shaped body or a band-shaped body having a certain strength, it can be used for a long period of time. In particular, the one woven with a string-shaped body or a band-shaped body combined with a metal wire such as steel, a shape memory alloy, or superelasticity retains the shape as it is, so it is possible to put the inner bag containing the contents in the outer bag. You can easily. Therefore, the multi-layer flexible container of the present invention is easy to take out, and exhibits excellent effects from the viewpoints of resource saving, environmental protection, and economical efficiency.

[Brief description of drawings]

FIG. 1 is a perspective view showing an inner bag constituting a multilayer flexible container of the present invention. 1a shows an inner bag made of cloth or the like, and FIG. 1b shows an inner bag made of paper.

FIG. 2 is a perspective view showing an outer bag constituting the multilayer flexible container of the present invention.

FIG. 3 is a perspective view showing an inner bag made of a tubular body.

FIG. 4 is a perspective view showing how to bind the lower part of the inner bag.
a is a flower knot and b is a single knot.

FIG. 5 is a partial plan view showing various aspects of the outlet for the contents at the bottom of the outer bag. a is due to the superposition of the central portions, b is a circular shape, and c is a square.

FIG. 6 is a partial cross-sectional view showing various aspects of how to close the lower portion of the inner bag. a is due to sewing with a sewing machine, and b is due to pushing.

FIG. 7 is a perspective view showing how to overhang the end portion of the outer bag to the handle.

FIG. 8 is a perspective view showing how to bend an end portion of a side portion of the outer bag.

FIG. 9 is a perspective view showing how to bend an end portion of the bottom portion of the outer bag.

FIG. 10 is a perspective view showing a state where an inner bag is packed in an outer bag.

[Explanation of symbols]

1 Inner bag 13 Square hole 2 Outer bag 14, 15
Spiral overlock 3 Upper binding part 16 Adhesive or sewing machine sewing 4 Lower extraction part 51, 52
String 5 String 53 Fixed part 6 Bottom 54, 55
String 7 handles 54a, 54
b end part 8 of string 8 overlapping part 54c of central part bundle of strings 9 side end 55a, 55
b end of string 10 bottom end 56 band 11 cloth or net 57 tape 12 circular hole 61, 62
Bottom of inner bag

Claims (7)

[Claims] 1. A multi-layer flexible container comprising an inner bag, a hanging handle at the top, and an outer bag having an outlet for the contents of the inner bag at the bottom. 2. The multi-layer flexible container according to claim 1, wherein the inner bag has a portion for taking out contents at a lower portion. 3. The inner bag is made of a tubular body, and the opening portion of the upper portion of the inner bag can be bound, and the extraction portion of the lower portion of the inner bag is bound by a string so as to be openable. The described multi-layer flexible container. 4. The multilayer flexible container according to claim 1, wherein the outlet of the outer bag is a circular or square hole. 5. The multilayer flexible container according to claim 1, wherein the seam of the outer bag is wrapped in a spiral shape. 6. The handle for hanging the outer bag is knitted by bundling vertical cords.
The multilayer flexible container according to any one of 1. 7. The multi-layer flexible container according to claim 1, wherein the mesh size of the outer bag is 50 mm □ or less.