JP2004115098A - Bag and device of filling content in the bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air permeable bag to which a content can be filled by using a filling device provided with a conventional suction type transfer means and to provide the filling device capable of effectively filling the content in the bag. <P>SOLUTION: The bag has a front sheet 11 and a back sheet 12 opposing to it. At least one of the front sheet 11 and the back sheet 12 comprises an air permeable portion 11b or 12b made of an air permeable sheet like material and an impervious portion 11a or 12a made by laminating a resin layer on the part of the sheet like material. The content can be filled in the bag by a filling device having a suction transfer means sucking and holding the impervious portion 11a or 12a of the bag 10 and transferring it to the downward portion of the filling device, an opening broadening means broadening the opening 14 of the transferred bag 10 and a bag enlarging means inserted from the broadened opening 14 in the inner side of the bag 10 to outward push and enlarge the front sheet 11 and the back sheet 12. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a bag used for a tea bag, a soup pack, and the like, and a filling device for filling the bag with contents.
[0002]
[Prior art]
For packaging of foods and the like, a bag made of a resin film, a metal film such as aluminum, or a laminated film thereof is often used. Typical forms of the bag include a flat bag in which two sheets (a front sheet and a back sheet) are stacked and three sides are closed, and a gusset bag having a gusset in addition to the front sheet and the back sheet. As
When the contents are filled in a bag made of such a resin film or a metal film and having no air permeability, as a filling device, for example, an uppermost one of a plurality of bags stacked vertically. Suction-type transfer means for suctioning and holding the bag stacked on the lower side while transferring the bag below the filling nozzle, opening means for spreading the front sheet and the back sheet of the transferred bag body outward, respectively. A bag having a filling means for filling the contents into a bag is conventionally used.
[0003]
On the other hand, recently, the contents contained in a bag and a liquid such as hot water, such as a tea bag containing tea leaves and a bonito flake pack, have to be ventilated for applications that require contact within the bag. Non-woven bags having excellent properties and water permeability and excellent strength are often used (for example, Patent Document 1).
[0004]
[Patent Document 1]
JP-A-8-98770
[Problems to be solved by the invention]
However, in the case of filling the contents into a gas-permeable bag such as a non-woven fabric bag, use a conventional filling device that has been used for a bag made of a resin film or a metal film without gas permeability. It was difficult. That is, since the nonwoven fabric bag has air permeability, it cannot be sucked and held, and the filling device provided with the suction-type transfer means as described above could not be used.
Therefore, when filling the contents into a breathable bag such as a nonwoven bag, the operator has to rely on manual work, such as placing the bags one by one below the filling means, There was a problem that productivity was low.
[0006]
The present invention has been made in view of the above-described problems, and has a breathability, and furthermore, a bag body that can be filled with contents using a conventional filling device having a suction-type transfer means, It is an object to provide a filling device capable of more efficiently filling the contents into such a bag.
[0007]
[Means for Solving the Problems]
The bag body of the present invention is a bag body formed having a front sheet and a back sheet facing the front sheet, and at least one of the front sheet and the back sheet is formed of a sheet material having air permeability. And a non-venting portion in which a resin layer is laminated on a part of the sheet-like material.
In the bag, it is preferable that both the front sheet and the back sheet include the ventilation section and the non-venting section.
The sheet is preferably a non-woven fabric.
The filling device of the present invention is a filling device provided with a filling means for filling the contents into the bag according to any of the above, wherein the non-ventilating portion of the bag is sucked and held, and the bag is placed below the filling means Suction transfer means for transferring to the bag body, opening means for expanding the opening formed in the transferred bag body, and inserted into the inside of the bag body from the opened opening, and the front sheet and the back sheet are outwardly moved. And means for expanding the bag.
The opening means preferably includes suction opening means for sucking the non-ventilated portion of the bag outward.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail.
1 and 2 show a bag 10 according to an embodiment of the present invention. The bag body 10 contains, for example, tea leaves such as green tea and black tea and soup stock such as bonito, and is used as a tea bag or soup pack. The bag body 10 of this example is formed by stacking two sheets of nonwoven fabric, which are air-permeable and water-permeable sheets, and closing three sides of the periphery. The opening is an opening 14. That is, the bag body 10 is a flat bag having a front sheet 11 and a back sheet 12 without a gusset or a bottom plate sheet.
[0009]
The non-woven fabric used here is a non-woven fabric substrate having a thickness of 100 to 120 μm made of polyester fibers, and a polyester fiber for heat sealing is pressure-bonded to one entire surface of the non-woven fabric substrate. The two nonwoven fabrics are overlapped so that the inner surface is a pressure-bonded surface (hereinafter, referred to as a pressure-bonded surface), and three sides are closed by heat sealing. The polyester fibers are bonded to the non-woven fabric substrate by pressure bonding. However, the non-woven fabric maintains air permeability and water permeability, and the pressure bonding does not impair air permeability and air permeability.
[0010]
In the bag 10, a low-density polyethylene (LDPE) layer 15 having a thickness of 15 to 20 μm is formed as a resin layer in the vicinity of the opening 14 inside the front sheet 11 and the back sheet 12, respectively. Non-ventilated parts 11a and 12a which are laminated and do not have air permeability are formed. On the other hand, portions of the front sheet 11 and the back sheet 12 where the LDPE layer 15 is not laminated are ventilation portions 11b and 12b that maintain air permeability and water permeability.
[0011]
According to such a bag 10, since the front sheet 11 and the back sheet 12 have the ventilation portions 11b and 12b, respectively, the tea leaves and the dried bonito are stored in the bag 10, When the liquid is introduced into the bag, the liquid passes through the ventilation portions 11b and 12b and comes into contact with the tea leaves and bonito in the bag body 10, so that necessary components such as a tea component and a dashi component can be extracted into the liquid. On the other hand, the front sheet 11 and the back sheet 12 of the bag body 10 also have non-breathable non-breathable parts 11a and 12a, respectively. It is also possible to transfer the bag body 10 and fill the contents using a filling device provided with a suction-type transfer means as described in the prior art.
[0012]
Although there is no particular limitation on the method for manufacturing such a bag 10, for example, it can be manufactured by the following method.
First, a nonwoven fabric substrate is manufactured by a wet method, a dry method, a dry pulp method, a spun bond method, a melt blow method, a needle punch method, a stitch bond method, a flash spinning method, a tow opening method, or the like. In this example, as the nonwoven fabric substrate, a material manufactured from a polyester fiber by a wet method or a spunbond method is used, but there is no limitation on the type of fiber as long as the nonwoven fabric substrate has air permeability and water permeability. Natural fibers such as cotton, hemp, silk, etc., synthetic fibers such as polyester fibers and acrylic fibers, glass fibers, metal fibers, etc., depending on the purpose of the bag 10, the type of contents to be filled in the bag 10, and the like. It can be selected as appropriate.
[0013]
Subsequently, a lump of fine fibers made of heat-sealable polyester is placed on one entire surface of the nonwoven fabric substrate, and the polyester fibers are pressure-bonded by a method such as thermocompression bonding. In this example, the heat-sealable polyester fiber is pressure-bonded to one entire surface of the nonwoven fabric substrate. However, the heat-sealing polyester fiber may be pressure-bonded only to the peripheral portion necessary for heat sealing, or may be used. The resin is not limited to polyester as long as it can be heat-sealed, and may be polyethylene or polypropylene.
The basis weight, thickness, tensile strength, seal strength, air permeability, freeness, and the like of the nonwoven fabric thus obtained are not particularly limited, and can be appropriately selected depending on the use of the bag 10 and the like. In the case of food applications such as tea bags and dashi packs, the basis weight is 18 to 62 g / m ² , the thickness is 80 to 180 μm, the tensile strength is 1.44 to 8.52 kgf / 15 mm in length, and 0.38 to 3 in width. .47 kgf / 15 mm, seal strength 0.28 to 0.68 kgf / 15 mm in height, 0.14 to 0.32 kgf / 15 mm in width, air permeability 360.8 to 49.6 cc / cm ² · sec, drainage It is preferable to be in the range of 1.87 to 2.71 sec / 500 cc. Here, “vertical” means the horizontal direction in FIG. 1 when the bag body 10 is used, and “horizontal” means the vertical direction in FIG.
[0014]
Next, the LDPE layer 15 is laminated at a predetermined position on the pressure bonding surface by a T-die method or the like to form the non-venting portions 11a and 12a. As a specific method, for example, as shown in FIG. 3, a nonwoven fabric is continuously supplied from an original fabric roll 22 below an extruder 21 equipped with a T-die so that a pressure-bonded bonding surface faces upward, An extruded partial laminating method in which LDPE is extruded from the T-die onto the pressure bonding surface and the LDPE layer 15 is continuously laminated can be exemplified. In FIG. 3, reference numeral 23 denotes a cooling roll, and reference numeral 24 denotes a winding roll.
The number of T dies is not limited to one. For example, three T dies may be used in parallel as needed, and LDPE may be extruded in three rows on a nonwoven fabric as shown in FIG. It is also possible to form the non-venting portions 11a and 12a.
In addition, here, the resin layer is formed by LDPE because the resin layer is easily formed by the extruded partial lamination method. However, the resin used is not limited, and polypropylene, linear LDPE, high density General heat-sealing resins such as polyethylene, ionomer, and ethylene-methacrylic acid copolymer (EMMA) can be used.
[0015]
Then, the nonwoven fabric on which the LDPE layer 15 is formed and the non-air-permeable portions 11a and 12a are partially formed is cut into a predetermined size, and two sheets are stacked so that the LDPE layer 15 side is inside, and three sides are formed. Is heat-sealed, the bag 10 of FIG. 1 can be manufactured. The method of forming the nonwoven fabric on the bag body 10 is not limited to the method of heat-sealing the three sides, but may be a method of closing with an adhesive or the like. In that case, pressure bonding for heat sealing is not required. Instead of using the two nonwoven fabrics to form the bag 10, a nonwoven fabric formed in a tubular shape in advance may be used, and the bag 10 may be formed by closing one end. Alternatively, the bag 10 may be formed by folding one nonwoven fabric into two pieces and sealing the two sides by welder sealing.
[0016]
In the bag 10 of this example, the resin layers are laminated on both the front sheet 11 and the back sheet 12 and the non-ventilated portions 11a and 12a are formed, but either the front sheet 11 or the back sheet 12 is formed. Only the resin layer may be laminated, and the non-venting portions 11a and 12a may be formed. Further, in this example, the resin layer is provided in the form of a band having a width W in the vicinity of the opening 14, but is partially formed on at least one of the front sheet 11 and the back sheet 12, and is sufficiently provided by a suction-type transfer unit. The position to be formed is not limited to the vicinity of the opening 14 as long as the shape and the size can be sucked, and may not be a belt-like shape.
Further, in this example, the sheet-like material used for the front sheet 11 and the back sheet 12 can be manufactured at a lower cost than a woven or knitted fabric, and the air permeability, the degree of water permeability, the thickness, the flexibility, and the like are arbitrarily adjusted. Although a nonwoven fabric which is easy to use is used, the material is not limited to the nonwoven fabric as long as it is a sheet-like material having air permeability, and may be an ordinary woven fabric or knitted fabric.
The form of the bag body 10 may be a flat bag consisting only of the front sheet 11 and the back sheet 12 as shown in FIG. 1, a gusset bag having a gusset, a bottomed gusset bag having a bottom plate, or the like.
Further, in this example, tea leaves, dried bonito and the like are exemplified as the contents to be filled in the bag body 10, and a non-woven fabric having both air permeability and water permeability is used as the sheet material to be used. In the case of a bag containing an agent, a deodorant, a fragrance, and the like, the bag does not need to have water permeability. Further, examples of the contents include bath salts.
[0017]
Next, an example of a filling device for filling contents into the bag 10 of FIG. 1 in which the non-ventilated portions 11a and 12a are formed in both the front sheet 11 and the back sheet 12 will be described.
FIG. 5 schematically shows a filling device 30 of the present invention, in which suction is performed by sucking and holding a non-ventilated portion of the bag body 10 and transferring the bag body 10 below a filling nozzle 35 serving as a filling means. Transfer means 36 is provided. The suction transfer means 36 of this example sucks and holds the topmost bag 10 of the plurality of bags 10 vertically stacked in the cassette 31 and holds only one bag 10. Suction means 33 for transferring the bag from the cassette 31 to the bag mounting table 32, and suction and holding of one bag 10 transferred onto the bag mounting table 32 by the first suction transferring means 33. And a second suction transfer means 34 for transferring the ink to a position below the filling nozzle 35.
[0018]
The first suction transfer means 33 includes a shaft 33a to which a suction pump (not shown) is connected, and a downward suction pad 33b provided at the tip of the shaft 33a. The suction pad 33b suctions and holds the non-ventilated portion 11a of the upper sheet (the front sheet 11 in this example) in the uppermost bag body 10 in the cassette 31. Then, in the held state, the shaft 33a extends horizontally in the left direction in the figure, and transfers the bag body 10 onto the bag body mounting table 32. At this point, the suction pad 33b releases the bag body 10 to release it. It is transferred to the bag mounting table 32.
[0019]
The second suction transfer means 34 is provided with two suction pads 34 a on the distal end side, is composed of a rotary shaft 34 c having a base end side fixed to a shaft 34 b, and is located on the upper side of the bag 10 By sucking and holding the non-ventilated portion 11a of the front sheet 11 by the two suction pads 34a as shown in FIG. 6, the bag body 10 is rotated by about 90 ° as shown by the arrow in FIG. The transfer is performed to a position below the filling nozzle 35 while keeping the opening 14 on the upper side.
[0020]
The filling device 30 in the illustrated example further has opening means (not shown in FIG. 5) for expanding the opening 14 of the transferred bag body 10.
The opening means in this example is a suction opening means, which includes a fixed suction pad indicated by reference numeral 37 in FIG. 6 equipped with a suction pump (not shown), and is transferred to below the filling nozzle 35 by the suction transfer means 36. The non-ventilated portion 12a of the back sheet 12 in the bag body 10 is sucked outward by the fixed suction pad 37 to widen the opening 14.
[0021]
Further, the filling device 30 is inserted into the bag body 10 before filling the contents into the bag body 10 from the opening portion 14 opened by the opening means, so that the front sheet 11 and the back sheet 12 are inserted. A bag expanding means 38 as shown in FIG. 7 is provided, which pushes outward from the inside to spread the contents in the bag body 10 easily. In FIGS. 5 and 6, the bag expanding means 38 is omitted.
The bag expanding means 38 is provided with a spherical head 38a made of a sponge or the like at its tip, and is formed of a rod-shaped body which can be moved up and down. The head 38a is lowered and inserted into the bag 10 so that the bag 10 can be sufficiently inserted. And the bag 10 is made to be in a state where the contents are easily filled. The bag expanding means 38 descends in this way to push and spread the bag body 10, and then rises to return to the original position.
[0022]
In the bag 10 which is sufficiently widened so that the contents are easily filled by the opening means and the bag expanding means 38, a measurement tank (not shown) is connected to the contents tank 35b by a filling nozzle 35 connected by a pipe 35a. A certain amount of contents measured by the means is filled. The bag body 10 filled with the contents is discharged from the filling device 30, and then the opening 14 is appropriately closed by a sealing device or the like, thereby producing a product such as a tea bag or a soup pack.
[0023]
As described above, the filling device 30 of the illustrated example includes the suction / transfer unit 36 that suctions and holds the non-ventilated portions 11a and 12a of the bag body 10 and transfers it below the filling means. It has suction opening means for expanding the opening portion 14 by suctioning to the non-ventilated portions 11a and 12a. Therefore, the bag 10 can be transferred below the filling nozzle 35 and the opening 14 can be expanded by effectively utilizing the non-ventilated portions 11a and 12a formed in the bag 10.
The filling device 30 further has a bag expanding means 38 which is inserted into the bag body 10 through the opening 14 and pushes the front sheet 11 and the back sheet 12 outward from the inside. Therefore, the front sheet 11 and the back sheet 12 are easily adhered to each other, and the contents can be efficiently filled into the bag body 10 made of a nonwoven fabric or the like which is difficult to fill the contents.
[0024]
In the above example, the first suction transfer means 33 includes a shaft 33a to which a suction pump (not shown) is connected, and a downward suction pad 33b provided at the tip of the shaft 33a. However, as long as only one bag 10 can be transferred to the bag mounting table 32 by sucking and holding the bag 10, the form is not limited. In addition, as the second suction transfer means 34, an example in which two suction pads 34a are provided on the distal end side and a rotary shaft 34 whose base end side is fixed to the shaft 34b is exemplified, There is no limitation on the form as long as it can suck and hold the bag body 10 placed on the bag body mounting table 32 and transfer it to below the filling nozzle 35.
Further, the filling device 30 may not have the bag mounting table 32 on which the bag 10 is mounted. In this case, the suction transfer unit 36 picks up one bag 10 directly from the cassette 31. Alternatively, the apparatus may be configured to be transferred directly below the filling nozzle 35, and may not be constituted by the first suction transfer means 33 and the second suction transfer means 34.
[0025]
Further, in this example, as the opening means, suction opening means including a fixed suction pad 37 for sucking the non-ventilated portions 11a and 12a of the bag body 10 outward is used, but it is not limited to the suction type. For example, the back sheet 12 of the bag body 10 transferred to below the filling nozzle 35 may be gripped and pulled outward to open. Such an opening means is useful, for example, in the case of the bag body 10 in which the non-ventilated portions 11a and 12a are formed only in one of the front sheet 11 and the back sheet 12. However, in the case of the bag body 10 as shown in FIG. 1 in which the non-ventilated portions 11a and 12a are formed in both the front sheet 11 and the back sheet 12, if the suction type is used, the configuration of the opening means is simple. Is preferable.
[0026]
Further, as shown in the illustrated example, the bag expanding means 38 is not limited to a bar-shaped body having a spherical head 38a made of a sponge or the like and having a tip end which can be moved up and down. Any other shape such as a plate-like body may be used as long as it is spread out. Also, the filling means is not limited as long as the contents are discharged downward.
[0027]
【The invention's effect】
As described above, since the bag body of the present invention partially has a non-ventilated portion that does not have air permeability, the contents can be filled using a filling device provided with a suction-type transfer unit and a suction-type opening unit. Can be filled, and the efficiency of the filling operation, which could only be performed manually in the past, can be improved. Further, according to the filling device of the present invention, there is provided a bag expanding means which is inserted into the inside of the bag body from the opening expanded by the suction opening means and pushes the front sheet and the back sheet outward from the inside. As a result, the front sheet and the back sheet can easily adhere to each other, and the contents can be efficiently filled even in a bag made of a nonwoven fabric that is difficult to fill the contents.
[Brief description of the drawings]
FIG. 1 is a perspective view showing one embodiment of a bag according to the present invention.
FIG. 2 is a sectional view taken along line AA ′ in FIG.
FIG. 3 is a process chart showing a method of forming a resin layer in the process of manufacturing the bag of FIG. 1;
FIG. 4 is a schematic view showing another example of a method for forming a resin layer.
FIG. 5 is a front view showing one embodiment of a filling device for filling contents into the bag body of FIG. 1;
FIG. 6 is a side view showing a second suction transfer unit and a suction opening unit provided in the filling device of FIG. 5;
FIG. 7 is a perspective view showing a state in which a bag expanding means provided in the filling device of FIG. 5 operates.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Bag body 11 Front sheet 12 Back sheet 11b, 12b Ventilation part 11a, 12a Non-ventilation part 14 Opening 15 LDPE layer 30 Filling device 36 Suction transfer means 38 Bag expansion means

Claims (5)

A bag formed having a front sheet and a back sheet facing the front sheet,
At least one of the front sheet and the back sheet is constituted by a ventilation portion made of a sheet-like material having air permeability, and a non-venting portion in which a resin layer is laminated on a part of the sheet-like material. Bag. 2. The bag according to claim 1, wherein both the front sheet and the back sheet include the ventilation part and the non-venting part. 3. The bag according to claim 1, wherein the sheet is a nonwoven fabric. A filling device comprising a filling means for filling the contents into the bag according to any one of claims 1 to 3,
Suction and holding means for sucking and holding the non-ventilated portion of the bag, and transferring the bag below the filling means,
Opening means for expanding the opening formed in the transferred bag body,
A filling device comprising: a bag expanding means inserted into the bag body from the expanded opening to push the front sheet and the back sheet outward. The filling device according to claim 4, wherein the opening means includes suction opening means for sucking a non-ventilated portion of the bag body outward.

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