JP2004338741A - Method and device for folding film ear part in bag-making and filling machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To fold a film ear (end) part in one direction when performing end seal on a cylindrical film. <P>SOLUTION: Upper and lower seal bodies 34 and 36 and upper and lower folding memory-forming members 48 and 50 are brought close to each other to fold front and back portions of a cylindrical film f to package an article 10. An end seal 42 is formed in the film f, and a folding memory 52 is provided. The cylindrical film f is cut by a knife 44, and the seal bodies 34 and 36 are separated from each other. At the time of releasing the cylindrical film f, compressed air is blown from an air nozzle 54 toward a film ear part 46 with the folding memory 52 from a lower side. The film ear part 46 is folded upwardly with a part of the folding habit 52 as a base point by the pressing force of compressed air, and the folding memory 52 is instantaneously cooled to maintain the folded state. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method and an apparatus for bending a film ear in a bag making and filling machine.
[0002]
[Prior art]
In order to facilitate bending of an end seal portion (film edge portion) extending outward from an article storage portion in a package manufactured by a horizontal bag making and filling machine, an end seal is provided on a tubular film in which an article is stored. There is known a method of imparting a folding habit to an end seal portion in advance when applying (for example, see Patent Document 1).
[0003]
[Patent Document 1]
JP 2001-354212 A
[Problems to be solved by the invention]
In the package obtained in Patent Literature 1, a portion extending from a position where the end seal portion has a fold to a tip of the seal portion is substantially straight. Therefore, when the end seal portion is bent at the bent portion, it is necessary to separately provide a bending device or the like on the downstream side of the packaging machine and perform bending. Also, for example, when transferring the package to the downstream side of the packaging machine, when the end seal portion is folded and a label is attached, or when the seal portion is folded and the seal portion is attached to the bottom, the end seal portion is also used. It was necessary to provide a bending device and the like for bending the end seal portion separately from the sticking device.
[0005]
[Object of the invention]
The present invention has been proposed in view of the above-described problems relating to the prior art, and has been proposed to appropriately solve the problem. In addition, when an end seal is applied to a cylindrical film, the tubular film extends outward from an article storage portion. An object of the present invention is to provide a method and an apparatus for bending a film ear in a bag making and filling machine capable of bending an outgoing film ear toward one side.
[0006]
[Means for Solving the Problems]
In order to overcome the above-described problems and appropriately achieve the intended purpose, a method of bending a film edge portion in a bag making and filling machine according to the present invention includes:
When the tubular film in which the articles are stored is sandwiched between a pair of seals in the end seal mechanism of the bag making and filling machine to perform end sealing and cutting, the tubular film is heated by a pair of habit forming members. A compressed air is blown to the film ears that are sandwiched and cut outward so as to extend outwardly from the article storage part. In addition to bending from the habit, the bending habit is cooled to maintain the bent state.
[0007]
In order to overcome the above-described problems and appropriately achieve the intended purpose, a film edge bending device in a bag making and filling machine according to another invention of the present application is provided.
In a bag making and filling machine that performs end sealing and cutting by sandwiching a tubular film in which an article is stored by a pair of sealing bodies in an end sealing mechanism,
A pair of heated curling members that sandwich the tubular film and impart a curl in the cross direction of the film,
A knife disposed on the seal body, for cutting the tubular film at the time of end sealing by the seal body,
Spraying means for blowing compressed air to the film ear cut by the knife so as to extend outward from the article accommodating section provided with the folding habit and to bend from the folding habit. .
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, a method and an apparatus for bending a film edge portion in a bag making and filling machine according to the present invention will be described below with reference to the accompanying drawings by way of preferred embodiments.
[0009]
FIG. 1 shows the overall configuration of a horizontal bag making and filling machine as a bag making and filling machine according to an embodiment of the present invention. The packing machine includes a supply conveyor 12 for supplying articles 10 at predetermined intervals. Prepare. Downstream of the supply conveyor 12, a bag making device 14 as a U-shaped bag making means which opens upward is disposed, and is fed by supply rollers 18 and 18 from a supply source 16 disposed below the article transfer path. The belt-shaped film F to be supplied is supplied to the bag making device 14 from below and formed into a substantially U-shaped tubular shape, and the articles 10 are delivered and supplied to the tubular film f from the supply conveyor 12. I have.
[0010]
On the downstream side of the bag making device 14, a first transfer conveyor 20 having a transfer surface facing substantially horizontally below a cylindrical film f transferred horizontally through the bag making device 14 is provided, The conveyor 20 extends to a position where an end seal mechanism 32 described later is disposed. The first transfer conveyor 20 is composed of an endless belt 22 that circulates and runs substantially horizontally below the transfer path of the tubular film f, and transfers the articles 10 placed on the tubular film f together with the film f from below. It is configured to be supported and transported substantially horizontally toward the downstream side.
[0011]
A pair of feed rollers 24, 24 (only one is shown) are disposed above the first transfer conveyor 20, and the overlapping surfaces along the transfer direction of the tubular film f are pinched by the rollers 24, 24, so that The film f is configured to be transferred to the downstream side. A pair of seal rollers 26, 26 (only one is shown) are disposed downstream of the feed rollers 24, 24, and the overlapping portions of the cylindrical film f are pressed by the rollers 26, 26, thereby forming the film f. The center seal 30 (see FIG. 7) is provided on the upper side of the article storage section 28 in which the article 10 is stored. In the first transfer conveyor 20, the endless belt 22 is set to be substantially at the same speed as the film transfer speed.
[0012]
A pair of seals 34, 36 heated by a built-in heater are opposed to an end seal mechanism 32 disposed downstream of the seal rollers 26, 26 in a vertical relationship with respect to a transfer path of the tubular film f. (See FIG. 4). The end seal mechanism 32 synchronizes the seals 34 and 36, which are in close contact with each other on the upstream side in the film transport direction and hold the tubular film f, in the transport direction of the tubular film f. So that the so-called box motion is repeated. A pair of sealing surfaces 38, 40 linearly extending along a width direction orthogonal to the film transport direction is provided on the opposing surfaces of the upper first seal body 34 and the lower second seal body 36. End seals 42 are formed in the front and rear positions of the tubular film f so as to sandwich the article 10 and have sealing surfaces 38, 38 and 40, 40 facing each other in the width direction along the width direction (see FIG. 5). Respectively.
[0013]
A knife 44 which can move forward and backward between the sealing surfaces 38 and 40 is disposed on the one (upper in the embodiment) first sealing body 34. The cylindrical film f facing between the surfaces 38 and 40 is cut along the transverse direction. Thus, a film ear 46 extending outward from the article storage portion 28 of the cylindrical film f and having the end seal 42 formed thereon is formed.
[0014]
The end seal mechanism 32 includes a pair of curling members 48 and 50 for imparting a curl 52 to the film ear 46 and an air nozzle as a blowing means for blowing compressed air toward the ear 46 to bend the film. 54 is provided. That is, as shown in FIG. 2, FIG. 5, and FIG. 6, a pair of quirks opposed to each other on the upstream side surface (side of the upstream seal surfaces 38, 38) of the seal bodies 34, 36. The attachment members 48 and 50 are provided, and the width dimension of both the attachment members 48 and 50 is set longer than the width dimension of the tubular film f. When the seals 34, 36 sandwich the portion between the articles 10, 10 contained in the tubular film f, the two curling members 48, 50 are provided on the upstream side of the end seal position. 28 (between the articles 10, 10) so as to provide a transverse folding habit 52 along the end seal 42 over the entire length in the width direction. A lower end edge (opposing edge) of the upper habit member 48 is formed in a mountain-like cross section, and an upper edge (opposite edge) of the lower habit member 50 is formed in a cross-sectional valley shape. By interposing the film f and sandwiching the same, the film 52 can be surely provided with the folding habit 52. Further, the meshing position (film sandwiching position) of the two curling members 48, 50 is opposite to the folding direction of the film ear 46 (described below in the embodiment) from the film sandwiching position of the seal members 34, 36. And is configured to prevent the bent tip of the ear 46 from extending outside the range of the bottom surface of the package. By forming the edge of the curving member on the side of the bending direction (upward in the embodiment) of the film ear 46 into a mountain shape, the bending becomes easy. Further, the curling members 48 and 50 of the embodiment are configured to be heated by contacting the seal members 34 and 36 so that the curl 52 can be more reliably imparted when the cylindrical film f is sandwiched. It is.
[0015]
As shown in FIG. 3, an air nozzle 54 connected to a compressed air supply source (not shown) is provided at a position close to the downstream side surface of the lower second seal body 36 (beside the downstream seal surface 40). It is arranged to extend in the width direction. The air nozzle 54 is held by a support base 55 disposed below the second seal body 36 via holding members 57, 57, and is provided with a fold 52 by the kinking members 48, 50. A large number of injection holes (not shown) for blowing compressed air from below toward the ear portion 46 (the film ear portion 46 on the downstream side of the package 60) are formed. In addition, the air nozzle 54 is set so that the blowing direction of the compressed air by the injection hole can be adjusted with respect to the holding members 57 and 57. The air nozzle 54 is set so that compressed air is blown toward the film ear 46 at an appropriate timing after the sealing members 34 and 36 are separated after the end sealing, and the pressing force of the air causes the film ear 46 to be compressed. 46 is configured to be bent upward in the cylindrical film f where the center seal 30 is located.
[0016]
In the transfer direction of the tubular film f, a pair of gusset molding members 62, 62 facing each other in the width direction across the film transfer path are disposed before and after the both seals 34, 36, respectively. It is configured to be integrally movable with the movement of the films 34 and 36 in the film transfer direction. The pair of gusset molding members 62, 62 are configured to move horizontally between a retracted position where the gusset is retracted from the film transport path and a pushing position that is moved toward the center of the film transport. Then, the gusset molding members 62, 62 are moved toward and away from each other in synchronization with the vertical movement of the two seals 34, 36. The gussets 64, 64 (see FIG. 7) are formed by pressing inward on both sides in the width direction before and after the end seal position. As shown in FIG. 5, the gusset molding members 62 on the upstream side are positioned so as to push the cylindrical film f facing between the holding position by the habit forming members 48 and 50 and the article storage portion 28. I have.
[0017]
The timing at which the gusset molding members 62, 62 move to the pushing position is set before the upper and lower seals 34, 36 come into contact with each other, and the two seals 34, 36 sandwich the tubular film f with the end seal 42. The gusset molding members 62 are set so as to return to the retracted position at an appropriate timing after the application.
[0018]
Downstream of the end seal mechanism 32, as shown in FIG. 1, a second transfer conveyor 56 constituted by an endless belt 58 that circulates substantially horizontally at the same level as the transfer surface of the first transfer conveyor 20 is disposed. Is established. The endless belt 58 of the second transfer conveyor 56 is set to have a speed higher than the running speed of the endless belt 22 of the first transfer conveyor 20, and is subjected to end sealing / cutting by both seals 34 and 36 of the end seal mechanism 32. It is configured to be able to reliably separate the discharged preceding package 60 from the subsequent unpackaged body and discharge it.
[0019]
The leading ends of the first transfer conveyor 20 and the second transfer conveyor 56 facing the end seal mechanism 32 are configured to reciprocate in the film transfer direction in synchronization with the second seal body 36, and the second seal body 36 are set so as to be separated from each other and close to each other in accordance with the vertical movement of 36. That is, in a state where the second seal body 36 is located at the lowest point, the tips of the two conveyors 20 and 56 are close to each other, and the delivery of the articles 10 stored in the tubular film f between the conveyors is excellent. In addition, the leading ends are separated from each other with the upward movement of the second seal body 36 to form a gap that allows the upward movement of the second seal body 36.
[0020]
Operation of the embodiment
Next, the operation of the film ear bending apparatus according to the embodiment will be described in relation to a bending method.
[0021]
The cylindrical film f to which the article 10 is supplied is transported downstream by the first transport conveyor 20 running at substantially the same speed as the film transport speed, and the upper and lower seals 34, 36 come close to each other at an appropriate timing. At this time, the respective ends of the first transfer conveyor 20 and the second transfer conveyor 56 that are directed to the end seal mechanism 32 are separated from each other, and the second seal body 36 is placed above the transfer path via a gap generated therebetween. It extends and clamps between the articles 10 of the cylindrical film f with the first seal body 34. As shown in FIG. 5, the habit forming members 48 and 50 disposed on the seals 34 and 36 and heated are located on the upstream side of the holding position (end seal position) of the tubular film f between the seals 34 and 36. Between the article storage portion 28 and the holding position of the seal bodies 34 and 36 below.
[0022]
At the timing before the two seals 34 and 36 come into contact with each other, the gusset molding members 62 and 62 come close to each other and push both sides in the width direction of the tubular film f inward (see FIG. 4). Gussets 64, 64 are formed on both sides in the width direction of the tubular film f at the corresponding positions where the end seals 42 are applied by the seals 34, 36. While the pair of seals 34 and 36 are moving substantially horizontally by a required distance with the transfer of the tubular film f, the end seal 42 is formed on the tubular film f and cut by the knife 44. As a result, a film ear 46 extending outward from the article storage portion 28 is formed. Further, a linear folding habit 52 is provided across the width direction at the position of the cylindrical film f sandwiched by the habit forming members 48 and 50. As shown in FIG. 7, the gussets 64 are formed on the film ears 46 at the corresponding positions by the gusset molding members 62, 62, and therefore, the bottom surface of the package (the downstream side of the article 10) where the ears 46 are bent. (Side end surface) can be formed in a substantially square bottom shape, and the width of the bent film ear portion 46 is substantially the same as the width of the bottom surface of the package 60, so that the appearance of the package is not spoiled.
[0023]
When the gusset molding members 62, 62 return to the retracted position, and the pair of seals 34, 36 move away from each other to release the cylindrical film f, the package 60 having been subjected to end sealing and cutting is removed. , Is quickly transferred from the end seal mechanism 32 to the downstream side by the second transfer conveyor 56 operating at high speed. At this time, along with the transfer of the cylindrical film f, the film ear portion 46 extending downstream of the article storage portion 28 in the subsequent unpackaged body and provided with the kinks 52 moves forward by a predetermined distance toward the downstream side. Accordingly, compressed air is blown from the air nozzle 54 toward the film ear 46 from below at an appropriate timing determined in relation to the blowing direction of the injection hole of the air nozzle 54 set in advance. (See FIG. 6). As a result, the film ear portion 46 is bent upward by the pressing force of the compressed air, with the fold habit 52 as a base, facing the center seal 30. The portion of the kinks 52 is heated and softened by the kinking members 48 and 50 which are in contact with the seal members 34 and 36 and whose temperature is raised, and thus can be easily bent by the pressing force of the compressed air. Further, in a state where the film ear portion 46 is bent, the bending habit 52 is instantaneously cooled by the compressed air, so that the bent state is maintained. That is, since the film ear 46 can be bent at the same time as the end seal 42 is applied to the cylindrical film f, it is not necessary to separately provide a bending device for bending the ear 46 on the downstream side. In addition, the end seal 42 heated and softened by the seal members 34 and 36 is cooled by the compressed air, which also has an effect of improving the sealing property.
[0024]
As shown in FIG. 6, the package body 60 transferred to the downstream side by the second transfer conveyor 56 has the downstream film ear portion 46 formed by bending, so that the ear portion 46 bent by the labeling device is formed. For example, it is possible to easily attach a label indicating the product's shelf life and the like, and to obtain a self-supporting packaging bag having the ear side as the bottom surface. That is, it is not necessary to install a bending device separately from the labeling device on the downstream side of the packaging machine, and the mechanical configuration can be simplified. Further, as described above, the film holding position of the curling members 48 and 50 is set to be on the lower side opposite to the bending direction of the film ear portion 46 with respect to the film holding position of the seal members 34 and 36. In addition, it is possible to prevent the front end of the film ear portion 46 bent along the bottom surface of the package from the folding habit 52 from extending outside the range of the bottom surface, thereby suppressing deterioration in appearance. In addition, it is possible to eliminate the looseness of the bottom surface when the package 60 is set up, and to stably stand the package 60 independently.
[0025]
[Modification example]
The present application is not limited to the configuration of the above-described embodiment, and other configurations can be appropriately adopted.
1. In the embodiment, the method and the apparatus for bending the film ear portion 46 are applied to the horizontal bag-making and filling machine, but can be applied to the vertical bag-making and filling machine.
2. The present invention is not limited to the one in which only the film ears 46 sandwiching the article accommodating portion 28 in the package 60 are folded, and the film ears 46 of the package 60 may be folded. In this case, a pair of habit forming members 48 and 50 and an air nozzle 54 are respectively disposed before and after sandwiching the seal bodies 34 and 36, and compressed air is blown from each air nozzle 54 toward the corresponding film ear 46. Can respond.
3. In the embodiment, the case where the forming members 48 and 50 are heated by the seal members 34 and 36 has been described. However, the forming members 48 and 50 are disposed on members separate from the seal members 34 and 36, and the built-in heaters are provided. And the like.
4. By forming the seals of the seal bodies 34 and 36 in the same shape as the opposing edges of the curling members 48 and 50 of the embodiment and other line seal shapes, the curling members 48 and 50 as separate members are omitted. The seals 34 and 36 themselves can also be used as a habit forming member. Further, a configuration may be adopted in which the upstream sealing surfaces 38, 38 of the seal bodies 34, 36 are omitted, and sealing is performed together with the folding habit 52 by the heated hammering members 48, 50. The seal at this time is not necessarily a hermetic seal.
5. The engagement position (film sandwiching position) of the curling members 48 and 50 is not limited to the embodiment, and is set so as not to be deviated in the bending direction of the film ear 46 or in the opposite direction with respect to the film sandwiching position of the seals 34 and 36. May be.
6. In the embodiment, the bending direction of the film ear portion 46 is bent upward (one side) in the direction of the center seal 30 positioned above, but is bent downward (the other side) in the opposite direction of the center seal 30. You may make it bend. Alternatively, a center seal 30 may be formed below, and the seal 30 may be bent upward or downward.
7. Although the air nozzle 54 is disposed on the lower seal body 36 on the side of the downstream seal surface 40, the direction of blowing compressed air from the nozzle 54 is directed to a direction in which the film ear 46 can be bent and formed. If it is set as such, it is not limited to that position, and it is possible to adopt a configuration in which it is disposed on the side of the upstream seal surface 38 or a member separate from the seal body 36. When the film ear 46 is bent downward, the air nozzle 54 is provided before and after the upper seal body 34 or on another member.
8. The seal members 34 and 36 are not limited to those of the box motion type, and can be applied to those which only open and close when the cylindrical film f is intermittently stopped.
[0026]
【The invention's effect】
As described above, according to the method and the apparatus for bending the edge of the film in the bag making and filling machine according to claims 1 and 2 of the present invention, when the end seal is applied to the cylindrical film, the film having the fold habit is provided. By a simple procedure of blowing compressed air to the ears, the film ears can be bent by the pressing force and cooled instantaneously to maintain the bent state.
[0027]
Further, in the bending method and apparatus according to the third and fourth aspects, since the gusset is formed on the cylindrical film, the bottom surface of the package body from which the film ears are bent can be formed into a substantially square bottom shape, and the self-standing stability can be improved. Is improved. Further, the width of the folded film ears is substantially the same as the width of the bottom surface of the package, and does not impair the appearance of the package.
[0028]
In the bending method and apparatus according to the fifth and sixth aspects, the film holding position of the curling member is set to be on the opposite side to the bending direction of the film ear portion from the film holding position of the seal body. Further, the tip of the ear portion is prevented from extending outside the range of the bottom surface of the package, and the appearance of the package is not impaired. In addition, it is possible to eliminate the looseness of the bottom surface when the package is set up, and to stably stand the package independently.
[0029]
In the bending device according to the seventh aspect, since the tubular film between the end seal formed by the seal body and the article accommodating portion is sandwiched by the add-on member to impart a folding habit, the article of the tubular film is provided. A package having an end seal before and after sandwiching can be obtained.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram showing a horizontal bag making and filling machine employing a bending device according to a preferred embodiment of the present invention.
FIG. 2 is a side view of a main part of the end seal mechanism according to the embodiment, as viewed from the upstream side.
FIG. 3 is a main part side view of the end seal mechanism according to the embodiment as viewed from a downstream side.
FIG. 4 is a side view of a main part of the end seal mechanism and the gusset molding member according to the embodiment when viewed from a downstream side.
FIG. 5 is an operation explanatory view showing a state in which a cylindrical film is sandwiched by a seal body of an end seal mechanism and a bending member of a bending device according to the embodiment.
FIG. 6 is an operation explanatory view showing a state in which a seal body of the end seal mechanism according to the embodiment is separated and a film ear is bent by compressed air.
FIG. 7 is a schematic perspective view showing a package obtained by a horizontal bag making and filling machine according to an example.
[Explanation of symbols]
10 Article 28 Article storage part 32 End seal mechanism 34 First seal body (seal body)
36 Second seal body (seal body)
42 End seal 44 Knife 46 Film ear 48 Curl member 50 Curl member 52 Crease 54 Air nozzle (spraying means)
62 gusset molding member 64 gusset f tubular film

Claims (7)

When the tubular film (f) containing the article (10) is sandwiched between a pair of seals (34, 36) in the end seal mechanism (32) of the bag making and filling machine to perform end sealing and cutting, The tubular film (f) is sandwiched by a pair of heated kinking members (48, 50) to impart a kinking (52) in the transverse direction. Compressed air is blown onto the film ears (46) cut so as to extend outward from (28) to bend the film ears (46) from the fold (52), and to fold the fold (52). ) Is cooled so as to maintain the folded state, and a method of folding a film edge portion in a bag making and filling machine. In a bag making and filling machine for performing end sealing and cutting by sandwiching a tubular film (f) containing an article (10) with a pair of sealing bodies (34, 36) in an end sealing mechanism (32),
A pair of heated curling members (48, 50) for holding the tubular film (f) and imparting a curl (52) in the transverse direction of the film (f);
A knife (44) disposed on the seal body (34, 36) and cutting the tubular film (f) at the time of end sealing by the seal body (34, 36);
Compressed air is blown onto the film ears (46) cut with the knife (44) so as to extend outward from the article storage portion (28) after being imparted with the fold (52). 52) A device for bending a film ear in a bag making and filling machine, comprising: a spraying means (54) for bending the film from the edge. 2. A film ear in a bag making and filling machine according to claim 1, wherein when the end seal (42) is applied to the tubular film (f), gussets (64, 64) are formed on both sides in the width direction of the film (f). How to bend the part. The film in the bag making and filling machine according to claim 2, further comprising a gusset forming member (62, 62) for pressing the film (f) from both sides in the width direction of the cylindrical film (f) to form a gusset (64, 64). Ear bending device. The bag making and filling machine according to claim 1 or 3, wherein the folding habit (52) is located on a side opposite to a bending direction of the film ear portion (46) from a film holding position of the seal body (34, 36). Method of bending the film ears. 3. The film holding position of the curling member (48, 50) is located on a side opposite to the bending direction of the film ear portion (46) from the film holding position of the seal body (34, 36). 5. A film edge bending apparatus in the bag making and filling machine according to 4. The habit forming member (48, 50) sandwiches and folds the tubular film (f) between the end seal (42) formed by the seal body (34, 36) and the article storage portion (28). 7. A film edge bending apparatus in a bag making and filling machine according to claim 2, wherein a habit (52) is provided.

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