JP3908897B2 - Packaging method with bag - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a packaging method using a bag that seals an open end of a thin flexible plastic bag filled with a packaged product to form a packaged product.
[0002]
[Prior art]
After filling a plastic bag with a packaged product, it is already widely practiced to seal the open end of the bag to make a packaged product. However, such a packaging method using a bag is practical for packaging using a thin and flexible plastic bag, although it is performed for packaging using a thick and strong plastic bag. The current situation is not.
[0003]
The reason for this is that after filling a thin plastic bag with a weak waist, and trying to seal the opening, the bag is soft and weak, so the opening can be sealed cleanly without wrinkles. This is because it is extremely difficult.
[0004]
For example, sliced bread, confectionery bread, etc., which are commercially available in thin plastic bags, are not sealed in their openings and are fitted with plastic clips or simply taped There are many things. Therefore, the food packaged in these thin plastic bags is not sealed by the seal of the opening, so small insects invade by the fragrant scent from the bread or confectionery bread, or in the process of distribution There was a risk of dust. In particular, if these small insects and dust are attached to the opening end of the bag and the clip or tape of the opening is removed, there is a possibility that those insects and dust may fall into the bag.
[0005]
However, after putting sliced bread etc. into a thin plastic bag, even if you try to seal the opening, the opening of the bag is weak and does not stand on its own, and even if it lies on its side, it will fall down in a flat surface without wrinkles Therefore, it is difficult to seal the opening, and even if the opening is sealed, wrinkles occur and the product value of the packaged product is significantly deteriorated.
[0006]
[Problems to be solved by the invention]
It is an object of the present invention to provide a packaging method using a bag that can seal the opening end of a thin plastic bag filled with a packaged product without any wrinkles.
[0007]
[Means for Solving the Problems]
To solve the above problems, the present invention is the bag filled with packages and transversely on a conveyor belt, flat by blowing air from above the open end of its the same open end with respect to the conveyor belt After opening the bag, the opening of the bag is opened, and two expanded bars are inserted into the opened bag, and the bag is widened laterally to widen the bag opening. A packaging method using a bag that is sealed with an open end of the bag interposed therebetween is provided.
[0008]
According to the packaging method of the present invention, the opening end portion of the bag filled with the packaged product is first held flat on the conveying belt, and the bag is opened in this state, so that the opening portion of the bag is surely opened largely. Since the two widened opening bars are inserted into the wide opening as described above and the opening is widened laterally, the bag filled with the product is flattened by widening the open end. Since the opening of the flattened bag is sealed with a sealer, the opening is sealed without wrinkles.
[0009]
Thus, according to the packaging method of the present invention, even if the plastic bag is extremely thin and weak, the opening is surely opened, and the opening end of the bag is opened by the expanded opening bar inserted therein. It is surely stretched in a flat state and can be sealed without causing wrinkles.
[0010]
In the packaging method of the present invention, as a conveying belt that holds the open end of the bag in a flat state, the bag is made of a material that is sticky to the bag so that the open end of the bag can be held , adopted belt exerting a suction force to the open end, in order to open the opening of the bag which is held to the conveyor belt in this manner, or blowing air toward the opening, by Rukoto to act the suction force Can be done.
[0011]
In the packaging method of the present invention, as described above, the opening end portion spread laterally by the widening opening bar is sandwiched between the above-described transport belt holding the opening end portion and the deaeration member, and the bag The deaeration member is moved relatively, and the deaeration member squeezes and discharges the air in the bag between the open end of the bag and the filled package, and then performs the above-described sealing. In this case, it is preferable that excess air does not remain in the packaged packaged bag after sealing.
[0012]
In this case, the relative movement between the bag for deaeration and the member for deaeration is determined by the movement of the bag by the action of pulling out the widening bar inserted from the bag opening and pushing the bag from the bottom. This is preferable because it is not necessary to separately provide a bag for deaeration or a member having a complicated structure for moving the deaeration member.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the case where the packaging method according to the present invention is applied to the packaging of sliced bread using a thin plastic bag will be specifically described with reference to the illustrated embodiments. FIG. 1 is a plan view showing an entire process of a packaging method according to an embodiment of the present invention. In FIG. 1, reference numeral 2 denotes a supply conveyor. The supply conveyor 2 conveys a bag 4 containing sliced bread filled with sliced bread and opened in the direction of arrow 3 from the previous step. A blade conveyor 6 conveys the sliced bread-containing bag 4 conveyed by the supply conveyor 2 in the direction of the arrow 7 while lying sideways.
[0014]
Reference numeral 8 denotes a guide. The guide 8 includes a sliced bread containing the sliced bread that is conveyed by the blade conveyor 6 with the bottom of the bag 4 containing the sliced bread that has been conveyed by the supply conveyor 2 being brought into contact with the guide 8 as shown in FIG. It serves to guide the bag 4. 10 and 12 are bag flat shaping blows for pressing the empty portion of the opening end of the bag 4 against the belt conveyors 14 and 16 so as to be flat, and the bag flat shaping blow 10 has a short air outlet. However, the bag flat shaping blow 12 has a round air outlet so as to blow the opening end of the bag strongly.
[0015]
The endless belt conveyors 14 and 16 are made of a material such as a silicon belt or a urethane belt that has adhesiveness to a plastic bag (holds a thin plastic bag attached). The conveyance conveyor which conveys the opening part of this is comprised. These belt conveyors 14 and 16 are stretched in parallel while being spaced apart from each other, and are both moved in the direction of arrow 15. FIG. 3 shows a state in which the positional relationship among the blade conveyor 6, the bag flat shaping blows 10 and 12, the belt conveyors 14 and 16, and the sliced bread-containing bag 4 in this portion is viewed from the side.
[0016]
Reference numerals 18 and 20 denote sirocco fans arranged side by side along the conveyance path of the sliced bread bag 4. The bags with the lower surfaces of the open ends attached to the belt conveyors 14 and 16 from the sirocco fans 18 and 20 respectively. By blowing air toward the opening 4, the opening end portion of the bag 4 is opened largely as shown in FIG. 4. 4 is an air cylinder. The air cylinder 22 moves the air blocking member 24 and functions to block air from the sirocco fans 18 and 20 from blowing out toward the bag 4.
[0017]
Reference numeral 26 denotes an enlarged opening bar, which is a set of two bars, each of which is rotatable around a pivot point 28 as indicated by an arrow 27 as shown in FIG. A spring 32 is tensioned between them. A cam follower 30 is provided at the rear end of the widened opening bar 26, and the cam follower 30 is moved along a cam surface (not shown) by moving the widened opening bar 26 in the direction of arrow 29. It is configured as follows.
[0018]
Therefore, the widened opening bar 26 is displaced as shown by the arrow 27 by moving the widened opening bar 26 in the direction (in the direction of the arrow 29) in and out of the opening of the bag 4 containing sliced bread. The widened opening bar 26 is inserted into the bag 4 having a large opening as shown in FIG. 4 with the tip thereof being squeezed as shown in FIG. The cam follower 30 is guided by a cam surface (not shown) so that the tip is opened in the state shown in FIG.
[0019]
A deaeration member 34 is arranged so as to be moved up and down so as to sandwich the opening end of the bag 4 flattened by the widening opening bar 26 with the belt conveyor 14. When the deaeration member 34 is lowered and the widened opening bar 26 whose tip is opened in the state of FIG. 5A is displaced in the direction of the arrow 33, the sliced bread bag 4 is moved in the direction of the arrow 35. When the bag 4 is pulled in the direction and the bag 4 is displaced, the deaeration member 34 squeezes and discharges the air contained in the non-filling space 36 in the bag.
[0020]
On the other hand, an air cylinder 38 is disposed at a position facing the widened opening bar 26, and the push bar 40 functions to push the bottom of the sliced bread bag 4 as shown by the broken line in FIG. As described with reference to FIG. 5, the push bar 40 pushes the bag 4 from the bottom in synchronism with the movement of the bag 4 in the direction of the arrow 35 by the widening opening bar 26, and the bag by the deaeration member 34 described above. 4 works to perform the deaeration operation.
[0021]
As shown in FIG. 7, the sealer 42 has an air cylinder 44 for moving the sealer 42 up and down, and a sealer receiver 46. Reference numeral 48 denotes an endless belt, which is disposed above the belt conveyor 16 and is conveyed at the same speed in the same direction as the belt conveyor 16. The bag 4 is flattened on the belt conveyors 14, 16 by the widening bar 26. Is held between the belt conveyor 16 and kept flat during the sealing by the sealer 42.
[0022]
The sealer 42 and the sealer receptacle 46 are the same as the bag 4 while the bag 4 is sandwiched and performing the sealing operation in order to seal the opening of the bag 4 that is being carried on the belt conveyors 14 and 16. The operation of returning to the original position at the same time as the movement at high speed is completed and the sealing operation is finished and the bag 4 is nipped. This type of sealer is known in the art, and a known sealer may be used as appropriate. Reference numeral 50 denotes a bag seal. A binding machine 52 serves to squeeze and bind the sealed portion of the bag 4 whose opening is sealed as described above. Since the binding machine 52 may have an appropriate configuration conventionally used, description of its structure is omitted.
[0023]
The illustrated apparatus has the above-described configuration. According to this, the bag 4 filled with sliced bread is sealed and packaged as follows. That is, when the bag 4 containing the sliced bread is fed in the direction of the arrow 7 by the blade conveyor 6 and comes to the position where the bag flat shaping blows 10 and 12 are arranged, from these bag flat shaping blows 10 and 12 The opening end of the bag 4 is pressed against the belt conveyors 14 and 16 by the blown air, and the lower surface of the bag 4 is attached to the surface of the belt conveyors 14 and 16 and held.
[0024]
In this state, when the bag 4 is conveyed by the blade conveyor 6 and the belt conveyors 14 and 16 and reaches the position of the sirocco fans 18 and 20, the opening of the bag 4 is enlarged as shown in FIG. Can be spread. When the bag 4 starts to enter the position of the sirocco fans 18 and 20 and finishes passing, the air blown from the sirocco fans 18 and 20 blows or closes the widened opening of the bag 4. The air outlets of the sirocco fans 18 and 20 are blocked by the air blocking member 24 when the bag 4 is carried in and after passing so as not to end.
[0025]
When the bag 4 whose opening is greatly widened comes to the position of the widening opening bar 26, the widening opening bar 26 whose tip is narrowed as shown in FIG. The tip is widened as in a), and the opening of the bag 4 is thereby flattened.
Further, the deaeration member 34 is lowered so that the opening end of the bag 4 is sandwiched between the belt conveyor 14. Thereafter, the bag 4 is pulled toward the wide opening bar 26 by performing a reverse movement operation with the widening bar 26 widened. At the same time, the air cylinder 38 is extended and the pushing bar 40 pushes out the bottom of the bag 4. By this operation, the bag containing the bread is moved toward the opening so that the air in the non-filling space 36 in the bag before the filling bread is sandwiched between the deaeration member 34 and the belt conveyor 16. It is degassed.
[0026]
As described above, the opening of the bag that is flattened on the belt conveyors 14 and 16 and the bottom surface is adhered to and adhered to the belt conveyors 14 and 16 is sandwiched between the sealer 42 and the sealer receiver 46 and sealed. Part 50 is formed and sealed. The sealed bag 4 containing sliced bread is sent to the binding machine 52, and the bag portion on the opening side is shrunk to perform appropriate binding.
[0027]
The seal of the bag 4 by the sealer 42 is bonded so as to achieve the sealing of the opening of the bag 4, but it is preferable that the seal is easily peeled off by hand when the consumer consumes. . As an example of the method, as shown in Japanese Patent Application No. 11-369916 related to the application of the present applicant, the adhesive layer bonded by heating to a temperature not higher than the sealing temperature of the film constituting the bag 4 is sealed. There is a method in which the opening is weakly temporarily sealed by being attached to the part in advance.
[0028]
The present invention has been specifically described above based on the illustrated embodiments. However, the present invention is not limited to these embodiments, and the specific structure and configuration are within the scope of the present invention shown in the claims. Needless to say, various changes may be made.
[0029]
For example, in the above-described embodiment, before sealing the bag 4 containing sliced bread, the degassing member 34 that is moved up and down to discharge the air in the unfilled space 36 in the bag 4 is provided, and the bag 4 is moved. However, depending on the type of package, deaeration is not essential and may be omitted in some cases. In the above embodiment, two sirocco fans that widen the opening of the bag are arranged. However, this may be one, or three or more if necessary.
[0030]
Moreover, in the said embodiment, the belts 14 and 16 which convey the opening edge part of the bag 4 containing slice bread are made of the material which has adhesiveness with respect to the plastic bag 4, and the bag made into the flat state on it is made. While ensuring that the opening is held, this is not essential. In order to securely hold the opening end of the bag, the perforated belt may be used to suck and hold air even if the transport belt itself is not sticky. As shown in FIG. 2, the belt conveyors 14 and 16 and the chain are run on the vacuum chamber 54 with the suction port 53 so that the suction force acts between the conveyance belts on the bag opening, and the bag opening end is held. You may make it convey by.
[0031]
Furthermore, in the above embodiment, in order to open the opening of the bag 4 being conveyed by the belt conveyors 14 and 16, air is blown from the sirocco fans 18 and 20 toward the opening, but the bag 4 is opened. In order to achieve this, not only such air blowing but also other means may be adopted as appropriate.
[0032]
For example, as shown in JP-A-57-194918, it may be opened by sucking a suction cup, or as shown in JP-A-55-64026 and JP-A-60-68229. Various known means such as an inclined belt with a suction tool or a vacuum roller with a suction hole may be employed.
[0033]
【The invention's effect】
As described above, the present invention is the bag filled with packages and transversely on a conveyor belt, by blowing air from above the open end of its the same open end flat with respect to the conveying belt state After opening the bag, the bag is opened, and two widened opening bars are inserted into the opened bag, and the bag is widened laterally to widen the bag opening. Provided is a packaging method using a bag which is sealed with a portion interposed therebetween.
[0034]
According to the packaging method of the present invention, the opening end portion of the bag filled with the packaged product is first held flat on the transport belt, and the bag is opened in this state, so that the bag opening portion is reliably opened wide. .
Two wide opening bars are inserted in the wide opening in this way and spread sideways, so the bag filled with goods is flattened with the open end widened sideways and flattened. Even if it is a very thin and weak plastic bag, the opening of the bag is sandwiched between sealers and sealed without any wrinkles.
[0035]
In the packaging method of the present invention described above, as a conveyor belt for holding the open end of the bag which is in a flat state, Ri was employed made of material having an adhesive property to the bag, exerting a suction force at the open end In the case of using the belt, the opening end of the bag is flattened and securely held, and the subsequent opening operation can be performed smoothly. Further, the opening or blowing air toward the opening can be easily opened by Rukoto to suction.
[0036]
In the packaging method of the present invention, as described above, the opening end portion spread laterally by the widening opening bar is sandwiched between the conveying belt holding the opening end portion and the deaeration member, and the bag and the deaeration The above-mentioned seal is made after the member is moved relatively and the air in the non-filling space in the bag between the opening end of the bag and the filled package is squeezed and discharged with the deaeration member. In such a case, it is possible that no excess air remains in the packaged bag after sealing.
[0037]
In this case, the relative movement between the bag for deaeration and the member for deaeration is determined by the movement of the bag by the action of pulling out the widening bar inserted from the bag opening and pushing the bag from the bottom. In what is performed, it is not necessary to separately provide a bag for degassing or a member having a complicated structure for moving the degassing member.
[Brief description of the drawings]
FIG. 1 is a plan view showing the configuration of a packaging apparatus for carrying out the packaging method of the present invention for packaging sliced bread.
2 is a cross-sectional view taken along line AA in FIG.
3 is a cross-sectional view taken along line BB in FIG.
4 is a cross-sectional view taken along lines CC and DD in FIG. 1. FIG.
5 is an explanatory view showing the configuration and operation of an enlarged opening bar used at the position of line EE in the apparatus of FIG. 1, wherein (a) shows a state in which the enlarged opening bar widens the opening of the bag. (B) has shown the state by which the enlarged opening bar was squeezed.
6 is an explanatory diagram showing the configuration and operation of a push bar disposed opposite to an enlarged opening bar in the apparatus of FIG. 1;
7 is a cross-sectional view taken along line FF in FIG. 1. FIG.
FIG. 8 is a side view showing another example of the conveyance belt with respect to the opening end of the bag.
[Explanation of symbols]
2 Supply conveyor 4 Slice bread containing bag 6 Blade conveyor 8 Guide 10 Bag flat shaping blow 12 Bag flat shaping blow 14 Belt conveyor 16 Belt conveyor 18 Sirocco fan 20 Sirocco fan 22 Air cylinder 24 Air blocking member 26 Wide opening bar 28 Pivoting Point 30 Cam follower 32 Spring 34 Deaeration member 36 Non-filling space 38 in the bag Air cylinder 40 Push bar 42 Sealer 44 Air cylinder 46 Sealer receiver 48 Endless belt 50 Sealing part 52 Binding machine 53 Suction hole 54 Vacuum chamber

Claims (7)

Was filled with packaged goods bags by transversely on the transport belt, after blowing the air from above the open end of its the same opening was flattened state with respect to the conveyor belt, the opening of the bag Opening, inserting two widening opening bars into the opened bag, spreading it sideways to widen the bag opening sideways, sealing across the opening end of the bag widened sideways Packing method by the characteristic bag. Was filled with packaged goods bags by transversely on the transport belt, after the same open end by blowing air from above was attached to a flat state with respect to the conveyor belt with an adhesive to the open end of its The opening of the bag is opened, and two widening opening bars are inserted into the opened bag, and then the bag opening is widened to the side. A packaging method using a bag, which is sandwiched and sealed. Was filled with packaged goods bags by transversely on the transport belt, after being held in a flat state with respect to the conveyor belt to exert a suction force to the opening end portion by blowing air from above the open end of its The opening of the bag is opened, and two widening opening bars are inserted into the opened bag, and the opening of the bag is widened laterally to widen the opening end of the bag. A packaging method using a bag, which is sandwiched and sealed.   The packaging method using a bag according to any one of claims 1 to 3, wherein the opening is opened by blowing air toward the opening of the bag.   The packaging method using a bag according to any one of claims 1 to 3, wherein the opening of the bag is opened by suction.   The opening end of the bag is sandwiched between the conveying belt and the degassing member between the opening end portion of the bag that is spread laterally by the widening opening bar, and the bag and the degassing member are moved relative to each other. The bag packaging method according to any one of claims 1 to 3, wherein the bag opening end is sealed after squeezing and discharging the air between the bag and the filled package product. .   The bag according to claim 6, wherein the air is discharged by moving the bag relative to the deaeration member by pulling out the expansion opening bar and pushing out the bag from the bottom. Packaging method.

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