JPS59174481A - Flexible container - Google Patents

Abstract

The flexible container has the lifting loops (6) joined together to form a permanent lifting handle. The loops are joined together at a lift area (4) by glue or a seam. The handle can comprise a piece of material (5) which at least covers the lower part of the lift area, pref. as a woven material sleeve. The lifting area is pref. less than a sixth of the circumference of the container. The handle can be fixed by sewing.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a flexible container for filling bulk material formed integrally with a lift loop. The invention also provides a method for manufacturing such containers from a few plain or circular weave substrates joined together to form one integral lift loop.

Containers of the type described above have been used for some time and have been found to be suitable for several purposes. These containers usually have an impermeable inner bag or lining. The container is usually first inflated with air before being filled with free-flowing bulk material. Such a container is described in (σ) US Pat. No. 413,703.

The container has a double bottom and is preferably provided with one integral lift loop, the total width of which is
All longitudinal fibers of the container have a value substantially equal to half the circumference of the container, such that 7 trebes have a value.

The container is covered by British Patent No. TSO3,! ; it can be filled using the apparatus described in No. 13 and then free standing on the floor or otherwise without the need for any extra auxiliary equipment. The lift loop can be engaged by a hook or the like before inflating the container and filling it with bulk material, after which the container can be ready for further transport, an operation which closes the inner bag. may consist of adhering the lift loops together by pressing them together and fixing them in this position, forming a suitable loop that can be easily engaged or placed on a hook or other conveying means. .

If a wide hook is used to suspend the 7-troop during the filling operation, the wide lift loops can be pressed together (p) up to a few centimeters and held in this position by tape. A well-defined loop is then formed in which the container is adapted for subsequent transport. This is European Patent Application No. 11/101 Near 11
G,! It is described in the specification of No. r (Notification! rll/'Ijt).

However, it has become clear that the method described above, in which the container is pre-prepared, has several drawbacks.

Some difficulties also arise when forming the lift loops of a container after filling (i.e., the time required for the operator to position the lift loops on the hooks that press the lift loops together limits the capacity of the filling equipment. limited.

If a pre-positioning operation is performed after filling the container to improve the capacity of the filling equipment, the filling operation as a whole requires more effort, as another operator is required to prepare the loops of the container. become. Furthermore, the shape of the container itself requires the use of special types of filling equipment in order to obtain efficient filling and an effective process for making the container usable. Thus, the widespread use of containers is hampered by the fact that no special filling equipment can be provided at any location where container filling can be done.

The fact that the lift loops may have a total width corresponding to half the circumference of the container indicates the labor involved in the process of joining multiple lift loops into one lift loop. Also, wide loops may cause some problems when placing or connecting the container on the filling device.

That is, there is a desire to make these operations easier and to require less effort.

Valuable experience from the prior art with integral multiple glue 7 troops which are joined by tape to form a single glue 7 troop after filling a container with loose bamboo material, what type of Norift loop survives. This seems desirable. These 97 Troops have been found suitable for inserting lift hooks, lift forks and other devices for container transport into the lift loops during subsequent transport of the containers.

For example, when using fork trucks, use special lifting equipment and place the lifting loops on these lifting equipment. This device is connected to the fork. In addition, the tape applied in the case of
Lift-loose load-bearing fibers may be damaged, especially if lift forks with sharp edges are used in this connection.

Therefore, it is better to use rift-loose fibers when
There is a need for a method of joining that will protect and withstand external forces when using forks.

It is an object of this invention to provide a permanent lift handle that can withstand external forces experienced during application of flexible containers.

Another object of the invention is to make it applicable to all types of filling and lifting equipment, so that the application of the container is not particularly limited by the need for separate equipment.

Yet another object of the invention is to provide a streamlined method of manufacturing a flexible container with an integral lift loop with a permanent lift handle.

It is clear that manufacturing the lift handle itself by joining the lift loops at the filling station requires considerable effort and requires a separate special hook for engaging the filling device. Starting from the desire to manufacture a lift handle free of special lift tools, they eventually discovered that it was easiest to form the lift handle in the same location where the container itself was manufactured.

If an empty container has a lift loop with a permanent lift handle, transporting such an empty container requires more costs than a regular container due to the larger volume to be transported. However, if you use a container with a permanent lift handle,
Since the filling operation itself becomes much easier, the benefits of this are considered to be even greater than the disadvantages of transporting empty containers.

Therefore, the question is how to best form a permanent lift handle. It has been found that this forming method can vary considerably depending on the type of base material from which the container is made.

In the case of a container with 7 troops, generally 2
It can be said that there are two types of substrates: plain weave and circular weave.

Circular fabrics can be joined in various ways. For example, the lift loop can be seamless or seamed, in which case the container is provided with side seams. Surprisingly, it has been found that lift loops can be manufactured in essentially the same way for different types of substrates. The portion of the substrate that forms the lift loops is folded in multiple layers towards the central area according to the width of the container, or -
They are placed together and in this state are joined in specially defined areas by adhesive, tape or at least seven seams. The width of the lift loop is thereby reduced to an appropriate dimension for forming the lift loop with the lift handle.

It has further been found that it is necessary to at least reduce the overall width of the lift loop such that the width of the lift area is a maximum of //6'/C of the container circumference. A lift loop with a lift handle is then obtained which is suitable for all operations such as filling, handling, transporting and emptying containers.

In other cases, it is desirable to prevent the lift loops thus formed from wearing against the load-bearing fibers. In this case, attach another piece of material to the lift handle itself. This piece should cover the lower part of the handle, i.e. the part that comes into contact with lifting equipment such as lift forks, hooks, etc. when lifting or transporting the flexible container. The piece may be in the form of a sleeve surrounding the lift handle and shall be bonded to the material of the lift loop to provide a permanent lifting point and shall be made of a material sufficiently rigid to withstand the external forces experienced during operation. Preferably, the cage piece is made of a woven fabric, for example the same material as the container itself.

Various features of the invention are set out in the claims.

The present invention will be explained in more detail below based on the drawings.

FIG. 1 shows a base material consisting of one hand part A, B,
The substrate l is provided with side edges 3 and incisions g that allow the formation of a double-bottomed container.

The substrate l is first folded towards the center so that the part which is to later form the lift loop 6 is gathered in the center of the fold line - in the area q of /A or less of the circumference of the container. Ru. In most cases, it is desirable that the lift area be 1/10 or less of the aforementioned circumference.

(/l) The side edge 3 is then placed in the position indicated by 3'.

The areas marked out on the lift loop 6 are joined by adhesive or preferably along at least one seam. The protective piece S can be fixed onto the area, for example by a seam. The piece S could be fixed around the area q so as to be in the form of a sleeve. The base material / is folded back on the folding line so that the hand portions A + B overlap. Then along the side edges 3 and at the bottom, by suturing the container, the lift handle IO with the protective piece S and the lever 7 troop 6
A fully finished container is formed.

The reinforcing piece S may be made, for example, from the same woven fabric as that used for the container itself, but it may also be made from another suitable material with sufficient strength to withstand the external forces that the container will be subjected to during subsequent handling. It's okay. The reinforcing piece 5 may be colored in a special color so that the lift points are clearly visible, but the reinforcing piece 5 can also be
+2) may be applied as a color code indicating. Although FIG. S shows the application of a further reinforcing element S, the permanent lift handle IO can also be formed without this reinforcing element, as described above, i.e. by simply joining the areas q. be done.

FIG. 1 shows a base material woven into a circular shape. The substrates are first joined by a seam/l at the top so as to form a lift loop 6 (with seven lift loops 6). A notch is made in the upper part of the reinforcing piece S so that the opening lower can also be used as a filling opening for bulk material to be stored in or conveyed by the container. Fold together with glue or less (
Both are attached by one seam to form a lifted region. The reinforcing piece S is then secured in area qVC in the same manner as described with respect to FIG. 1, and the permanent lift handle IO
・Form. The bottom of the container can be formed accordingly, so that the container is in the shape 8 ready for filling.

FIG. 3 shows a circularly woven base material l, in which lift loops are formed in advance, and lift regions q can be formed by folding these lift loops as described above. can. The side edges 3 of the container are then sewn over the seams//d, and these seams terminate slightly below the lift loops to form the open lower. The container is ready to be filled at any time, unless a container with a special bottom is desired.

FIG. q shows the lift loop t together with the lift handle 10, in which case the reinforcing piece S fixed only at the lower part of the lift handle 10 is not shown, but the reinforcing piece S
A seam 9 is shown for fixing the to the area.

Both opening lowers are shown to be of the same size in this case, but if desired the one used as a filling opening could be made slightly larger than the other opening lower.

A container formed according to the invention can be connected directly to a filling device at any time. A filling tube is inserted into one open lower, the container is inflated with air, and then filled with a free-flowing material. During the filling operation the lift loop may be hung on the hook of the filling device, but strictly speaking this is not necessary.

In fact, the inflated bag can stand on its own without substantial support from the open side of the filling operation. Once the container is filled, simply close the inner bag and the container is ready for transport.

The invention streamlines the manufacture of containers with lift loops with permanent lift handles. Filling such a ready-made container can be done quickly (and easily) with fewer operations than would normally be required if lift points were to be created in the filling station.

The filling operation itself is significantly simplified since there is no need to hang the container on special hooks or to form lift handles. For this purpose, the container is ready for transport after filling and closing the inner bag. The capacity of the filling equipment is utilized to the maximum (/S) degree, and the entire operation of filling the container and making it ready for transport becomes labor-intensive.

The main advantage provided by the invention is that it does not require special and complex filling equipment.

This means that a lift fork can be used that can be easily inserted under a clearly defined lift handle, which is a material handling device, without damaging the lift handle or the lift loop (in case of a filled container). The lift handle 70 according to the invention with the protective strip S can be sufficiently rigid to withstand brief handling operations, especially when using rough lifting devices.
protects the fibrous structure of the lift loop 10 from abrasion.

[Brief explanation of drawings]

Fig. 1 is a plan view showing a flat woven flexible container base material; Fig. 2 is a plan view showing a round woven flexible container base material including seams and having 7 troves; The figure shows a plan view showing a round woven flexible container substrate with a seamless chair (/6).
This is the top of the Troop. In the figure, A: Lift loop, 10
: Lift handle, /l: Seam. FIG, IA' FIG, 4") /lc'%74 carving\FIG, 2 518-

Claims (1)

[Claims] / A flexible container for filling bulk material integrally formed with lift loops, comprising at least seven lift loops with permanent lift handles. Seven or more lift loops (6) are joined together so that the multiple loops (6) of the lift handle (l) are connected together.
A flexible container, characterized in that it is folded or pressed together and joined at the lifting area (41) by adhesive or at least one seam. A flexible container according to claim 7, characterized in that the permanent lift handle (10) comprises at least a piece (S) covering the lower part of the lift area. Flexible container according to claim 1 or 2, characterized in that a piece (j) in the form of a sleeve of cloth tube is fixed around the girder region (1). Lift area of width not more than 171. of circumference (
A flexible container according to any one of claims 1 to 3, characterized in that seven or more lift loops are joined together at 1I). In a method for manufacturing a flexible container consisting of base materials made of plain or round weave joined together so as to form seven lift loops (6), the base materials (1) on which lift loops (X) are to be formed ) are folded back or pressed together to form at least one lifting area (4'), and if necessary a piece (S) is placed at least in the lower part of the lifting area (4').
By fixing the permanent lift handle (10
) A method for manufacturing a flexible container, characterized by forming a flexible container. 6. First join the parts of the substrate (1) that are to be folded or pressed together and then attach the pieces 1&) to or around the lift area (da) or by sewing. A method for manufacturing a flexible container according to claim S, characterized in that it is fixed to form a lift handle (10). A base material (1) consisting of 2J half-captives, (B) is used as a base material (
1) is first folded back towards the center of the fold line (2), and after forming a lift loop tA) in a slight area on both sides of the fold line (2), the area is joined together with the lift area (2), and at least the lift area is The length and area (l) are sufficient to cover the lower part of (4t)
A piece (1) having the same width as I) is fixed to the area, and then the base material (1) is attached so that the hand part tpJ 1 (B) overlaps.
7. The method of manufacturing a flexible container according to claim 3, wherein the container is folded back along a folding line (U) and the seams of the side and bottom portions of the container are sewn. g. The base material (1) is made of circular weave pieces, which are joined together first above the IC to form a lift loop (A), with an opening at the top of the side edge (3). (W), the lift loops (A) are joined in at least seven lift regions (4'), the lift regions being joined by gluing or sewing, and if desired, the lift regions (4')
Lift the piece (S) covering the lower part of the lift area (
4') and then joining the lower part of the piece (1) to form the bottom of the container. Method of manufacturing containers.