JPS61115846A - Flexible bulk vessel with support stand - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to intermediate bulk containers, in particular flexible intermediate bulk containers, and such containers in combination with support racks. Such containers typically have a capacity of 0.5 to 3 m2, are usually in the form of sacks or flea rags, and are suitable for packaging granular materials (e.g. chemicals and fertilizers) in bulk quantities. Widely used for storage, transportation. Typically, when filled with granulate, such bags have a diameter of 0.8 to 1.5 m and a height of 0.5 to 1.5 m.
It forms a 5m cylindrical shape. □ European Patent No. 80839 discloses a system comprising: a flexible intermediate bulk container; The following configuration is described. The cradle makes it possible to insert the forks of a forklift truck under the outer part of the intermediate bulk container base and thus lift the intermediate bulk container (preferably together with its cradle).

By using such a configuration, some mounts/
Combinations of filled bags can be stacked.

In use (especially when stacked in such a way):
To enable stable stacking, the bags must withstand significant hoop application.

It is also generally desirable for the pouch to be substantially impermeable to protect the contents from the weather.

Therefore, these requirements have traditionally required bags to be made from tough, weather-resistant materials. An example of a conventionally employed barrier structure is a combination of an impermeable film of plastic material and an oriented polyolefin tape such as oriented 41J propylene or high density 4 The purpose was to produce bags from a laminate with fabric knitted from tape.

Bags made from such laminates are relatively expensive because such laminates are difficult to make, which greatly increases the cost of the bag.

We have now found that, if certain configurations are adopted, lightweight and inexpensive bags can be used for this purpose.

The invention is therefore made from an impermeable film of plastic material and closed at one end.

A flexible intermediate bulk container consisting of a bag which when filled with particulate material assumes a generally cylindrical shape, with its closed end resting on a surface, and suitable for use with a cradle as described above. and the pouch is provided with a flexible reinforcing sleeve around substantially all the ridges of the portion (the pouch) corresponding to the cylindrical surface when filled with particulate matter. A flexible intermediate bulk container is provided.

The reinforcing sleeve may be made of a fabric woven from natural or synthetic fibers or tapes (e.g. weight 100-20017
It is the one of m. Tapes include polyethylene tapes such as high density polyethylene tapes or oriented polypropylene tapes.

Alternatively, the sleeve may consist of a film of plastic material, preferably an oriented film, although the sleeve need not be impermeable. In the latter case, the direction of maximum orientation in the film is.

It should be parallel to the hoop direction of the bag.

During the manufacture of bags to ensure the correct position of the sleeve,
Preferably, the sleeve is fixed to the pouch, for example by adhesive. The fixation need not be all over; in fact, the sleeve may be held in place simply by a fluff or spot of adhesive.

Support racks suitable for use with intermediate bulk containers of the present invention generally consist of a pair of support members positioned below the base of the container such that the container is placed between the two support members. It can hang down into the cavity to a depth substantially equal to the height of its support rack. The support members are joined together such that the maximum spacing between them and their height is sufficient to permit lifting by interaction of the forks of the forklift truck with the support members.

When a sleeved bag is filled with granulate and placed on a support rack as described above, the weight of the contents and the weight of the stacked bag/support rack combination (if stacked) ) will hang directly through the base of the bag onto the surface on which the bag and support rack rest.

However, when the bag is removed by the fork of a forklift truck placed under the outer portion of the base of the bag,
When lifted alone or with support racks,
The majority of the load is transferred directly to the outer portion of the bag base, which is supported by the forks of the forklift truck, as a result of frictional forces between particles of the granules within the bag. Due to interparticle friction, the film material forming the base of the bag does not need to have the strength to withstand the tensile forces equivalent to supporting the full load, and therefore does not need to be of particularly strong construction. (・.

However, as stated above, the base of the bag must withstand a tensile force corresponding to supporting a portion of the load. Therefore, the bag-like article of the present invention can be made of, for example, low-density 4+) ethylene,
50 to 350 of a linear low-density polyethylene, a blend or coextrusion thereof, and a strong plastic film at the end.
It may be manufactured from a thickness of microns, preferably from 100 to 250 microns.

When filled with particulate matter, the top of the bag usually
It is flattened into a roughly cylindrical shape. Suitably, the reinforcing sleeve extends around the cylindrical bag and from the top of the cylindrical wall (ie the L side of the granules) to the bottom of the cylindrical wall.

Preferably, the reinforcing sleeve extends over the bottom (base) portion of the container (i.e., the sleeve contacts the support rack and optionally the surface on which the container and support rack rest). (placed so that they touch each other). The serpentine structure provides additional strength and support at the base of the container, reduces outward bulge, and increases the stability of a stack of containers. Furthermore, bags (containers)
The possibility of wear and contact failure of these parts is reduced by the reinforcing sleaze.

In one preferred embodiment, to further reduce the likelihood of such breakage and wear.

A reinforcing patch can be applied to the base of the container. This patch may be of the same material as the reinforcing sleeve or a different material. Conveniently, it is the same material. As mentioned above, the reinforcing sleeve preferably extends over a portion of the base of the container.

Therefore, typically some portion of the base of the container is not covered by the sleeve. Preferably reinforcing patches.

The parts not covered by such sleeves should be covered and protected. Such patches are conveniently attached to the sleeve and container base in a conventional manner (eg, by adhesive).

Additionally, in another aspect, the reinforcing sleeve extends over the top portion of the container.

That is, the reinforcing strips are folded to reduce damage and wear on the top of the container. Furthermore.

A reinforcing patch is also applied to the top of the container. This patch may be of the same material as the sleeve or a different material. Preferably, the patch covers the portion of the container top not covered by the folded sleeve. The patch is conveniently attached to the sleeve and container top by conventional means (eg, adhesive).

Lifting straps can be affixed to or manufactured integrally with the containers of the invention. but.

It is preferred not to employ such lifting straps, resulting in significant cost savings. Generally, the containers of the present invention are designed to be handled by support racks. However, in some cases it may be necessary for the end user to lift the filled container off the support rack before or during emptying. Accordingly, in another embodiment of the invention, the reinforcing sleeve extends around the bag, which becomes cylindrical when filled with granules, from the bottom of its cylindrical wall to the top surface of the filled granules. Also provided is a container which extends in the form of a substantially cylinder and is characterized in that at least a portion of its sleeve extends further into the mound than the upper surface of the filled granules. The part of the sleeve that is closer to the b side of the filled granules should not be attached to the bag or be easily removed from the bag. When using the bag, the top of the bag should be flattened and the sleeve should be attached to the bag. The top should remain as a prominent extension. Such a sleeve extension.

It can be mechanically gripped in a variety of ways, for example by a clamp forming part of the end user's wrist machine. Preferably, such a sleeve extension is formed around the entire circumference of the end of the sleeve (i.e., in the form of an upright collar).

In another aspect, the reinforcing sleeve is folded over a portion of the top of the container, and the fold is mechanically gripped by an end user's lift machine to lift the bag. can.

Preferably, such a sleeve extension is made of the same material as the sleeve body and is integral with the sleeve body.

In another aspect of the invention, the material of construction of the sleeve extension suitably has at least one region having reinforcing threads woven into it. It is even more suitable that there be a plurality of such regions. The areas containing these reinforcing threads increase the strength and facilitate lifting of the container by the end user's lift i. Conveniently, the regions containing these reinforcing threads are provided in the form of bands running in the warp direction (ie in the direction from top to bottom) of the sleeve.

In use, the end user can grasp the upright sleeve extension, such as by the clamp of a lift machine. Alternatively, the folded portion of the sleeve can be held at the reinforcing thread band.

As mentioned above, it is preferred that the sleeve extension is made of the same material as the sleeve body and is integral with the sleeve body. Accordingly, in such a case, the reinforcing thread band runs (extends) along the length of the sleeve, directing the container's resistance to hoop application.

Conveniently, the reinforcing threads are of any synthetic polymer, such as polyester, polyolefin or polyamide 9.

One embodiment of the present invention will be explained with reference to the drawings.

FIG. 1 shows an example of a flexible intermediate bulk container consisting of a bag 1 filled with particulate material, the bag having a base 2 supported on a surface 3. . A reinforcing sleeve 4 extends around the bag 1 to provide additional strength to the generally cylindrical portion of the bag as well as to the base of the bag.

This sleeve 4 is affixed to the bag in a conventional manner (for example by a row of spots of hot melt adhesive). The base (bottom) 2 of the bag has a reinforcing patch 6 placed below the sagging area 7. This reinforcement patch 6
is attached to the bag 1 and the reinforcing sleeve 4, for example by adhesive. The outer part B8 of the container reference is supported from the surface 3 by a wooden frame 9 (see FIG. 2).

The size of the support rack 9 is such that the forks of a forklift truck can be inserted into the openings 10 (L and 10b) of the support rack.

The intermediate bulk container of the present invention is preferably filled with granulate while resting on the hills of a support rack, since such a temperature allows the formation of the required amount of sag, and the conventional vibration This is because by using the type filling device, the north face of the packed granules can be made substantially flat. In that case, it is preferable to substantially remove the air within the bag after filling and to fold the top 11 of the bag material.

When the bag and support rack are lifted off, most of the weight 11 is transferred directly to the forks of the forklift truck due to interparticle friction. Relatively small proportion of the load (i.e. roughly corresponding to the shaded area 7)
Only this will be transmitted via the material of the base of the bag 1 to the forklift truck 7 oak. The size of the shaded area 7 for a given intermediate bulk container/support rack combination will depend on the nature of the particulate material within the bag.

The bag-like object 1 is made of an impermeable plastic film (for example, 200
From micron-thick polyethylene) blown tubes, approximately hexagonal ABCDEF when laid flat
It is convenient to make it so as to give the base area of '.

A reinforcing sleeve 4 (e.g. a fabric of weight 150.!i'/m2 knitted from oriented high-density polyethylene tape) is applied to the bag 1 before or after the folding operation which gives the bag 1 its base shape. (eg, by hot melt adhesive).

The base has wires AG, AH and DG on the inflated tube.
, DH at the bottom of the tube, respectively, by bending them to form the shape shown in FIG. When the triangular 7-lap ABD in the E direction is folded northward about the line AD, the shape shown in Figure 5 is created. Next, the corners G and H are bent in a direction in which they become closer to each other with respect to the lines BC and ER, resulting in the shape shown in FIG. 6.

As shown in Figures 3a to 6a, the folds AG, AH and DG%D are positioned so that they overlap somewhat so that the overlapping parts GH and J can be fixed together, for example by welding or adhesive. preferable.

Overlapping Section 5) The GH work, T may be a lap joint as in Figure 5a, or may be secured (e.g. fused) to form a butt joint to provide an upright section which is then flattened. Fold and secure with adhesive, for example, and
It can also have a shape as shown in the figure. 5b has the shape shown in FIG. 6b when folded along lines BC and EF'.

If desired, the folds along lines BC and EF' can be positioned such that the angles G and H overlap somewhat, as shown in FIG. 6c, but such overlap is particularly important for folds AG.

It is preferable that AH, DG, DH7\I and J are arranged so that they do not overlap.

Preferably, a reinforcing patch is applied (for example with adhesive) to the rectangular part 5)BCEF of the base (bottom).

In this type of configuration, at the bottom of the bag, the reinforcing sleeve 4 preferably extends at least as far as the line AD, which forms the long axis of the hexagonal base ABCDEr, but usually below the line B I C1. There is no need to extend to

When the sleeve 4 is filled with granules and supported on the above-mentioned support rack, the lower end of the sleeve 4 is attached to the bag 1.
and the pedestal 9 (see Figure 1).
Preferably, it extends sufficiently beyond. This not only provides a cleaner appearance, but also provides more secure support to the bag by eliminating the possibility of outward bulging between the bottom of the sleeve and the portion of the bag supported by the cradle. give.

After filling the bag with granules, the top of the bag is usually closed in the same manner. In this embodiment, the reinforcing sleeve extends to the top of the fill within the pouch.

In yet another embodiment of the invention, an intermediate bulk container as shown in FIGS. 7-8 is also provided.

In FIG. 7, the reinforcing sleeve 4 extends above the upper surface 12 of the filled granules in the filled pouch 1 and has an extension 13.
is formed.

This sleeve extension 13 allows the lift e to be engaged without damaging or soiling the bag and its contents.

As shown in FIG. 8, the reinforcing sleeve 4 is
It is made of a material having a band of reinforcing threads extending in the hoop direction (i.e. not in the hoop direction).

In use, a lifting machine can be secured to those portions of the sleeve extension 13 made of reinforcing threads.

[Brief explanation of the drawing]

The drawings illustrate specific embodiments of the invention. FIG. 1 is a longitudinal sectional view of a filled bag supported on a support rack. FIG. 2 is a sketch of the support frame shown in FIG. 1. 3 to 6 are nine plan views showing the procedure for folding the inflatable tube to form the closed lower end of the bag-like article. Figures 3α to 6α are plan views showing slightly modified folding sheets of Figures 3 to 6. Figures 5b and 6b are plan views modified from the method of Figures 5cc and 6a. FIG. 6c is a plan view showing a modification of the method of FIG. 6. FIG. 7 is a longitudinal cross-sectional view of another example of a filled bag supported by a support rack. FIG. 8 is a sketch of a filled bag supported on a support rack. 2: Base 3: Surface 4: Reinforcement sleeve 6: Reinforcement patch 9: Support rack (5 people outside)

Claims (10)

[Claims] (1) (i) made of an impermeable film of plastic material, closed at one end, and having a substantially cylindrical shape when filled with granules with the closed end resting on a surface; A flexible intermediate bulk container comprising a pouch having a flexible reinforcing sleeve around substantially all of its cylindrical surface when filled with particulate matter. (ii) supporting an outer portion of the container base above the surface on which the container rests and below the outer portion of the container base for lifting operations; A structure comprising: a container support rack into which a hawk portion of a hawk lift truck can be inserted; (2) The composition according to claim 1, wherein the reinforcing sleeve is a woven fabric of oriented polyolefin tape. (3) A composition according to claim 1, wherein the reinforcing sleeve is a woven fabric of fibers or tapes of natural or synthetic material. (4) The reinforcing sleeve extends to cover a portion of the base of the container and is disposed between the support rack and the outer portion of the base of the container. The composition described in any of the above. (5) The composition according to any one of claims 1 to 4, wherein a reinforcing patch is in contact with the base of the container. (6) The reinforcing sleeve extends and is folded over a portion of the top of the container, and the reinforcing patch is abutted against the top of the container.
The composition according to any of Item 5. (7) A structure according to any one of claims 1 to 6, wherein the reinforcing sleeve is made of a material having a plurality of bands of reinforcing threads extending in the warp direction. (8) A pouch made of an impermeable film of plastic material, closed at one end, and assuming a substantially cylindrical shape when filled with granules with the closed end resting on a surface. A flexible intermediate bulk container comprising:
Suitable for use with a support frame as claimed in claim 1, the pouch is provided with a flexible material around substantially all of the portion corresponding to the cylindrical surface when filled with particulate matter. A flexible intermediate bulk container as described above, characterized in that it is provided with a flexible reinforcing sleeve. (9) The reinforcing sleeve has an extension that is above the top surface of the granule when filled with the granule, and the height of the extension is such that the unloading device can be engaged therewith. Claim 8 characterized in that the height is sufficient to
Containers listed in section. (10) The container according to claim 8 or 9, wherein the reinforcing sleeve is formed from a material having a plurality of bands of reinforcing threads extending in the warp direction.