JP2009241936A - Inner bag for granular body container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inner bag for a granular body container for increased durability of the bag and for smooth discharge. <P>SOLUTION: This relates to an inner bag 10 positioned on the inside of a container where a granular body to be transported by the container is stored. The bag 10 is made of a flexible sheet laminated with a synthetic resin layer at least on one face of a cloth. A bottom liner sheet 36 which is sturdier than the synthetic resin layer of the flexible sheet is laid on the bottom face 12 of the inside of the bag 10. A perpendicular rizing part 38 can be formed on the edge of any side of the sheet 36 excluding the granular body outward discharge side of the container. The bag 10 can be provided with a wrap part 39 covering the part 38. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to an inner bag for a granular material container, and more particularly to an inner bag for a granular material container, which is a box-shaped container that transports granular material and is installed in a container having a door at one end in the longitudinal direction.

  Conventionally, as part of streamlining logistics methods, bulk transport of chemical products, plastics, cereals, fertilizers, and the like has been actively performed. As one of the transportation means, an inner bag is mounted inside a generally used box-type large container, the inner bag is filled with contents, transported, and the container body is dumped up to about 30 degrees ( It is discharged from the rear door of the container by inclining. In such a case, since an inexpensive film molded product is used in the inner bag and a general container is diverted, the transportation cost can be reduced.

For example, an inner bag made of a tubular film that has been extruded and welded at both ends has been proposed (Patent Document 1). A fixing bar is used to fix the inner bag to the container.
In addition, an inner bag is proposed in which suspensions are sequentially arranged at predetermined intervals on the upper edge of the side portion along the longitudinal direction of the bag body and the edge of the top portion along the short side direction. (Patent Document 2).

  However, the inner bags described in Patent Documents 1 and 2 are formed using an inexpensive flexible synthetic resin film or thin sheet, and have the strength to withstand the load of the loaded cargo. This material is easy to deform or break. For this reason, it is low in durability and needs to be replaced and discarded after being used several times.

  In addition, the container wall surface is often corrugated for reinforcement, and the height inside the container is about 2.5 m, and the height of the packing is 2 m or more after filling the loaded granular material. It becomes. In the inner bag formed from the flexible synthetic resin film or thin sheet, the size of the inner bag is set to the inner dimension of the container so that the load applied to the inner surface of the inner bag is normally borne on the container wall. It must be used as a larger one. That is, since the inner surface of the container is smaller than the inner bag and the inner bag size is left, it must be fixed to the container while generating wrinkles on the wall surface and the bottom surface. For this reason, especially due to the wrinkles generated on the bottom of the inner bag, the granular material is caught on these wrinkles, and even if dumped up to 30 degrees, the entire amount of cargo is not discharged, and finally it is a human work. The remaining amount must be discharged.

  To solve this problem, we developed a very slippery material by blending slip agent as the material for the inner bag of the transport container, and the inclination angle of the large container on the truck bed is 30 There has been a proposal that the synthetic resin pellets as the contents can be slid down in a state of less than 5 degrees (Patent Document 3). This material is formed of a synthetic resin film or sheet made of a synthetic resin composition containing a slip agent. Alternatively, the synthetic resin film or sheet is laminated with another synthetic resin film or sheet or a synthetic resin woven fabric or a synthetic resin flat yarn cloth. Patent Document 3 uses an inner bag support for the purpose of protecting the inner bag of a container for transporting synthetic resin pellets and supporting the pressure applied to the rear portion of the inner bag when discharging the synthetic resin pellets. It is described.

  However, the synthetic resin film or sheet containing the slip agent as described above preferably has a thickness in the range of 30 to 500 μm, and low-density polyethylene is particularly preferable. There is a problem of contamination with cargo. In addition, since low density polyethylene is a flexible resin, there is a problem in durability with respect to impact wear when filling cargo, and wear fragments may occur. The problem is that the generated wear fragments are contaminated. Furthermore, since the bottom of the inner bag is also formed of a film or sheet made of a flexible synthetic resin, the loaded cargo itself is pressure-bonded to the bottom of the inner bag due to the weight of the loaded cargo, and is therefore dumped up to 30 degrees when discharged. However, the entire amount cannot be discharged, resulting in a residual discharge. In addition, in such a flexible and low-stiffness synthetic resin film or sheet, wrinkles are particularly likely to occur on the bottom surface, and even if dumped up to 30 degrees when discharging loaded cargo, the wrinkles will be caught in the wrinkles. As a result, the entire amount cannot be discharged, resulting in a residual discharge. Then, there exists a problem which requires work, such as scraping out these discharge | emission remainders by hand.

  Further, when the inner bag is mounted in the container, the inner bag is generally attached to a predetermined position by bonding the outer wall surface of the inner bag and the wall surface of the container with an adhesive or the like (Patent Document 4). ). However, even if this is done, the wrinkles on the bottom surface do not disappear.In particular, there is a problem in that the wrinkles on the bottom surface further occur due to the displacement of the inner bag in the discharge direction due to the dumping up at the time of discharge, resulting in residual discharge. is there.

As described above, applying a soft, low-rigidity flexible synthetic resin film or sheet to the bottom surface of the container inner bag has a problem in discharging the entire amount.
Further, since the container body is composed of a metal wall, once the inner bag is attached, it is impossible to check the state of the inner bag other than the door side opening unless the inner bag is removed. For this reason, even if breakage such as rubbing or tearing due to friction or the like occurs in the inner bag, it cannot be found and there is a risk of foreign matter mixing.

On the other hand, in order to improve the ease of cleaning, discharge, etc., a container inner bag that can be used repeatedly is proposed by joining and separating a part of the members constituting the inner bag by means of contact and separation means such as a slide fastener. (Patent Document 5). However, a member such as a slide fastener is easily damaged during filling and discharging, and there is a possibility that the damaged member is mixed into the cargo granular material as a foreign substance. Therefore, such a configuration is difficult to adopt as a material constituting a large opening for inspection.
JP 49-70776 A JP 58-112982 A JP 2003-128183 A Japanese Patent Publication No.57-2591 JP-A-11-165790

This invention makes it a subject to raise the durability of an inner bag and to be able to perform discharge | emission operation | work smoothly in the inner bag for granular material containers.
Another object of the present invention is to enable early detection of abnormalities such as breakage in the inner bag in the inner bag for a granular container.

  The subject is an inner bag installed inside the container to accommodate the granular material transported by the container, and is formed by a flexible sheet having a synthetic resin layer laminated on at least one side of the fabric. In addition, the problem can be solved by the container inner bag, in which a bottom sheet having rigidity higher than that of the synthetic resin layer is laid on the bottom surface inside the inner bag.

  In the present invention, in the container inner bag, a vertical rising portion is formed at the edge of an arbitrary side excluding the discharge side of the granular material to the outside of the container in the bottom sheet, and the rising portion is provided on the inner bag. It is preferable that a covering wrap portion is provided.

  According to the present invention, in the inner bag for a container, an openable and closable filling port is formed on the top surface of the inner bag to fill the inside of the inner bag with a powder and granular material. On the surface of the corresponding inner bag, a discharge port for discharging powder particles inside the inner bag and an inspection port large enough for a person to enter and exit the inner bag are formed to be independently openable and closable. It is preferable that

  According to the present invention, the inner bag is formed of a flexible sheet in which a synthetic resin layer is laminated on at least one side of the fabric, and the bottom sheet having a higher rigidity than the synthetic resin layer is formed on the bottom surface inside the inner bag. Since it is laid, the durability of the inner bag can be improved, and the powder can be discharged completely from the inner bag by the bottom sheet laid on the bottom surface of the inner bag. Efficiency can be improved.

  In addition, a vertical rising portion is formed at the edge of any side except the discharge side of the granular material outside the container in the bottom sheet, and a wrap portion is provided on the inner bag to cover the rising portion. Thus, it is possible to reliably prevent the powder particles from entering between the bottom sheet and the bottom surface of the inner bag.

  In addition, since an inspection port is provided separately from the discharge port for discharging powder particles, people can go in and out of the inner bag with the inner bag attached to the container, so it is easy without removing the inner bag from the container And can be used safely and repeatedly for a long time.

  FIG. 1 shows an inner bag for a granular container according to an embodiment of the present invention. The inner bag 10 is composed of a sheet, and this sheet is arranged such that a soft synthetic resin layer is laminated on at least one side of the fabric and the synthetic resin layer is exposed on the inner surface of the inner bag 10. It is formed of a flexible sheet. Thereby, durability required for long-term repeated use can be provided. As the fabric, a woven fabric, a knitted fabric, or a non-woven fabric selected from natural fibers, synthetic fibers, semi-synthetic fibers, or fibers obtained by mixing them can be appropriately used. Among these, a plain fabric using polyester or nylon is preferable. Soft synthetic resin to be laminated on the fabric is soft vinyl chloride resin, ethylene-vinyl acetate copolymer resin, urethane resin, silicone rubber, fluorine elastomer, olefin elastomer, styrene elastomer, etc. Can be selected from the following resins. Of these, soft vinyl chloride resin, ethylene-vinyl acetate copolymer resin, and urethane resin, which can be molded by high-frequency welding, are preferable. From the viewpoint of avoiding contamination to the contents, it is also possible to use a soft resin of the same type as the type of powder as cargo to be loaded.

  The thickness of the flexible sheet having the above-mentioned laminated structure is preferably 0.5 mm or more and 2.0 mm or less from the viewpoint of the strength of the inner bag 10. When the thickness is less than 0.5 mm, the strength is insufficient. When the thickness is more than 2.0 mm, the flexible sheet becomes hard and handling of the bodywork such as mounting inside the container becomes difficult.

  Specifically, a sheet having a thickness of 0.75 mm in which an ethylene-vinyl acetate copolymer resin is laminated on both sides of a polyester plain weave cloth can be suitably used as the flexible sheet constituting the inner bag 10.

  And using such a flexible sheet | seat, by sewing a junction part by a high frequency welder welding, the top | upper surface 11, the bottom face 12, the front-and-back end surfaces 13 and 14, and the left and right side surfaces 15 and 16 are used. A hexahedral inner bag 10 can be formed.

  FIG. 7 shows a state where the bag 10 is mounted inside the container 2 of the truck 1. Reference numeral 3 denotes a filling hatch for filling the inside of the container 2 with powder particles, and is formed on the top plate of the container 2. 4 is a door for opening and closing the container 2 and is provided at the rear end of the container 2. The hexahedral inner bag 10 shown in FIG. 1 is formed to have substantially the same dimensions as the internal dimensions of the container 2.

  As shown in FIG. 1, a plurality of loop belts 18 for mounting the inner bag 10 inside the container 2 are provided on the outer surface of the inner bag 10. By passing a mounting bracket or a mounting belt (not shown) through the loop belt 18, the loop belt 18 is fixed to the container, and the inner bag 10 is mounted to the container.

  The top surface 11 of the inner bag 10 is provided with a cylindrical filling port 19 formed of a similar sheet. The filling port 19 is provided in a form protruding from the inner bag 10 at a position corresponding to the filling hatch 2 of the container 2. The filling port 19 is provided with a binding belt 20 for opening and closing the filling port 19.

  As shown in detail in FIG. 1 and particularly FIG. 2, a cylindrical discharge formed of a similar sheet is formed at the lower end portion of the rear end surface 14 of the inner bag 10 corresponding to the door 4 of the container 2 in FIG. An outlet 21 and a cylindrical inspection port 22 are provided so as to protrude side by side.

  The discharge port 21 has a tapered funnel shape, and its front end opening 23 is positioned near the center of the rear end surface 14 of the inner bag 10. In order to prevent a large amount of powder particles from being discharged from the inner bag 10 at a time, the size of the tip opening 23 is preferably formed to be, for example, about 200 mm long and about 250 mm wide. In addition, the dimension of the front-end | tip opening part 23 can be suitably set according to the conveyance processing capability of a discharge destination besides this.

  The inspection port 22 is formed in a straight cylindrical shape so that an operator can enter the inside of the inner bag 10. That is, after the discharge of the granular material in the inner bag 10 is finished, an operator enters the inner bag 10 from the inspection port 22 and checks whether the inner bag 10 is damaged by rubbing or tearing. Has been able to do. The inspection port 22 has a size that allows the operator to smoothly enter and exit, and the size of the opening can be, for example, 300 mm long and 800 mm wide. The inspection port 22 can also be used when discharging the granular material in the inner bag 10.

  The discharge port 21 and the inspection port 22 are provided with a binding belt 24 for opening and closing the discharge port 21 and the inspection port 22. The discharge port 21 and the inspection port 22 are provided at the lower end portion of the rear end surface 14 of the inner bag 10 as described above so that the opening / closing operation using the binding belt 24 can be performed on the ground. Has been.

  As shown in FIGS. 7 and 3, the opening of the rear end of the container 2 where the door 4 is provided prevents the inner bag 10 containing the granular material from expanding when the door 4 is opened. The inner bag support frame 28 is provided in a detachable state. The inner bag support frame 28 has a plurality of support bars 25 in the lateral direction, and these support bars 25 are provided at intervals above and below the discharge port 21 and the inspection port 22 in a vertically spaced state. It has been. A plurality of binding belts 26 are provided on the rear end surface 14 of the inner bag 10 at positions corresponding to the support bars 25 in order to attach the rear end surface 14 to the support bars 25.

  When the inner bag 10 is filled with a granular material and transported, the discharge port 21 and the inspection port 22 formed by the sheet are positioned inside the container 2 with the opening being closed by the binding belt 24. It is folded up. The rear end surface 14 of the inner bag 10 is provided with a plurality of presser belts 27 for maintaining the folded state. That is, by setting the presser belt 27, it is possible to prevent the folded discharge port 21 and inspection port 22 from protruding backward from the container 2. By providing the holding belt 27 in this manner, the discharge port 21 and the inspection port 22 play a role of preventing the door 4 from being hindered by protruding backward from the container 2. Further, the presser belt 27 can be used simultaneously with the binding belt 24 to double-close the discharge port 21 and the inspection port 22, so that foreign matter from the discharge port 21 and the inspection port 22 to the inside of the inner bag 10 can be removed. It is also possible to enhance the effect of preventing mixing.

  As shown in FIG. 1 and FIG. 6, in the lateral corner portion of the rear end surface 14 of the inner bag 10, it is possible to prevent the inside of the inner bag 10 from being in a depressurized state when the granular material as loaded cargo is discharged. An air supply pipe 29 is provided in communication with the inside and outside of the inner bag 10. The air supply pipe 29 includes a vertical main body 30 provided in the inner bag 10, an upward inner opening 31 provided at the upper end of the main body 30, and the lower end of the main body 30. And an outer opening 32 penetrating laterally toward the outside of the inner bag 10.

  On the rear end surface 14 of the inner bag 10, a cylindrical cover 33 that can cover the outer periphery of the outer opening 32 of the air supply pipe 29 is integrated with the inner bag 10 by the same sheet as the inner bag 10. Is provided. Reference numeral 34 denotes a binding belt, which can open and close the cover 33 at a position closer to the tip than the outer opening 32.

  As shown in FIG. 1, a bottom sheet 36 is provided inside the inner bag 10 so as to cover the bottom surface 12 thereof. As shown in FIGS. 1 and 5, the bottom sheet 36 is provided on the left and right sides excluding the main body portion 37 having substantially the same dimensions as the bottom surface 12 of the inner bag 10, the rear end surface 14 and the front end surface 13 of the inner bag 10. And a rising portion 38 provided at an edge portion of the main body portion 37 corresponding to the side surfaces 14 and 15. The bottom sheet 36 is formed of a material that is higher in rigidity and harder than the material constituting the inner bag 10 such as a high-density polyethylene resin. For example, when the high density polyethylene resin is used, a sheet formed by bending the rising portion 38 to a height of 150 mm while the thickness of the sheet is 2 mm can be suitably used. The bottom sheet 36 can be temporarily joined to the bottom surface 12 of the inner bag 10 as necessary. As a temporary bonding method, a pressure-sensitive adhesive method using a double-sided tape, a sandwiching method, and the like can be appropriately selected.

  As shown in FIG. 6, the inner bag 10 is provided with a wrap portion 39. The wrap portion 39 is provided so as to hang from the upper side of the bottom sheet 36, and covers the inner surface of the rising portion 38 of the bottom sheet 36 from above so as to be sandwiched between the inner bag 10. It is configured to be able to. The wrap portion 39 can be made of the same material as the soft synthetic resin constituting the inner bag 10. For example, the inner bag is formed by high frequency welder welding using an ethylene-vinyl acetate copolymer resin film having a thickness of 1 mm. It is suitable for being attached to the inner surface of 10.

  Although not shown, between the inner wall surface of the container 2 shown in FIG. 7 and the outer surface of the inner bag 10, the outer surface of the inner bag 10 rubs against the inner wall surface of the container 2 due to vibrations during transportation by the truck 1. In order to prevent wear due to being applied, a sheet such as a polyethylene foam can be inserted as a cushioning material.

  When the granular material is transported by the container 2 using the inner bag 10 having such a configuration, the inner bag 10 having the above-described configuration is mounted inside the container 2 and inside the door 4 in the container 2. The inner bag support frame 28 is installed. The discharge port 21 and the inspection port 22 are closed by a binding belt 24, folded, and then pressed by a pressing belt 27. The cover 33 covering the outer opening 32 of the air supply pipe 29 is also closed by the binding belt 34. In addition, powder particles such as polystyrene pellets are filled into the inner bag 10 from the filling port 19. At this time, since the bottom sheet 36 is installed on the bottom surface 12 of the inner bag 10, it is possible to prevent the occurrence of impact wear on the bottom surface 12 of the inner bag 10 when filling the granular material.

Thereafter, the filling port 19 is closed by the binding belt 20, the filling hatch 3 and the door 4 of the container 2 are closed, and then the transportation by the truck 1 is performed.
At this time, since a highly rigid and hard bottom sheet 36 is provided at the bottom of the inner bag 10 and this bottom sheet 36 covers the bottom surface 12 of the inner bag 10, wrinkles are generated on the bottom surface 12. Even if it is, it can prevent that a granular material enters the inside of this wrinkle. Further, since the bottom sheet 36 is formed of a material harder than the inner bag 10, even if the inner bag 10 is filled with a granular material to a height exceeding, for example, 2 m, the bottom granular material is still in the bottom. It is possible to prevent pressure bonding to the laying sheet 36. Further, since the rising sheet 38 is formed on the bottom sheet 36, and the inner bag 10 is provided with a wrap part 39 covering the rising part 38, the lap part 39 is interposed by the weight of the granular material. Thus, the rising portion 38 can be pressed against the left and right side surfaces 15, 16 of the inner bag 10, so that the granular material inside the inner bag 10 enters between the bottom sheet 36 and the bottom surface 12 of the inner bag 10. Can be surely prevented. Since the rising portion 38 is covered by the wrap portion 39, it is possible to surely prevent the granular material from entering between the rising portion 38 of the bottom sheet 36 and the inner bag 10.

  When taking out the transported granular material from the container 2, the door 4 of the container 2 is opened, the discharge port 21 and the inspection port 22 are opened if necessary, the cover 33 is opened, and the inner bag 10 is opened by the air supply pipe 29. Communicate inside and outside. Then, in this state, the container 2 is dumped up and the granular material is discharged to the outside from the discharge port 21 and, if necessary, the inspection port 22.

  At this time, since the highly rigid and hard bottom sheet 36 is provided at the bottom of the inner bag 10, the granular material is given a good slip and is effectively discharged. Further, since the bottom sheet 36 covers the bottom surface 12 of the inner bag 10, even if wrinkles are generated in the inner bag 10, the powder particles are not caught on the wrinkles, and the entire amount of the powder particles remains. Can be discharged efficiently.

  In order to perform the functions as described above, the bottom sheet 36 needs to be a material that has high rigidity, is hard, and has low frictional resistance. For example, the above-described high-density polyethylene resin, ultrahigh molecular weight polyethylene resin, tetrafluoroethylene resin, polypropylene resin, hard vinyl chloride resin, and the like can be suitably used. High-density polyethylene resin is more preferable from the viewpoint of price and availability. In the case of a high density polyethylene resin, the thickness of the bottom sheet 36 is preferably 1.5 mm or more. If it is thinner than this, it will not protect against the impact wear of the bottom surface 12 of the inner bag 10, and the bottom sheet 36 itself is likely to be wrinkled. This causes a problem that powder particles remain. The rising portion 38 preferably has a height of 100 mm or more in order to sufficiently exhibit the effect of preventing the granular material from entering. However, this does not apply depending on the size of the container and the size of the loaded granular material.

  In order to use the inner bag 10 for a long period of time, it is necessary to inspect daily or periodically. At this time, as described above, since the large inspection port 22 is provided in addition to the dedicated discharge port 21 having a relatively small diameter, a person can enter and exit the inner bag 10, and the inner bag 10 is placed in the container. 2, it is possible to inspect the degree of damage of the inner bag 10 from the inside.

It is a three-dimensional figure of the inner bag for granular material containers of an embodiment of the invention. It is a figure which expands and shows the principal part in FIG. It is a three-dimensional view of the principal part which shows the state which mounted | wore the container with the inner bag of FIG. It is sectional drawing of the principal part in FIG. It is a three-dimensional view of the bottom sheet in FIG. It is an expanded sectional view of the principal part which shows the installation state of the bottom sheet | seat of FIG. It is a three-dimensional view which shows the state which mounted | wore the container of the truck with the inner bag of FIG.

Explanation of symbols

2 Container 10 Inner bag 12 Bottom surface 19 Filling port 20 Bundling belt 21 Discharge port 22 Inspection port 24 Bundling belt 27 Holding belt 36 Bottom sheet 37 Main body portion 38 Standing portion 39 Lapping portion

Claims (3)

  An inner bag installed inside the container to accommodate the granular material transported by the container, wherein the inner bag is formed by a flexible sheet having a synthetic resin layer laminated on at least one side of the fabric; An inner bag for a granular container, wherein a bottom sheet having rigidity higher than that of the synthetic resin layer is laid on the bottom surface inside the inner bag.   A vertical rising portion is formed at the edge of an arbitrary side excluding the discharge side of the granular material outside the container in the bottom sheet, and a wrap portion is provided on the inner bag to cover the rising portion. An inner bag for a granular material container according to claim 1.   An openable and closable filling port is formed on the top surface of the inner bag to fill the inside of the inner bag, and the inner bag surface corresponding to the door side of the container is formed on the inner bag surface. 3. A discharge port for discharging internal powder particles and an inspection port having a size allowing a person to enter and exit the inner bag are formed so as to be independently openable and closable. Inner bag for granular container.

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