JP2010006455A - Device for removing wrinkles of sealing end part in lateral-type bag-making filling machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device well preventing wrinkles of a film generated upon sealing end. <P>SOLUTION: In this wrinkle removing device, sandwiching members 14 move from both outer sides intersecting with a film conveyance path toward inside, both-side edges of a tubular film 5 crushed by a predetermined amount by a sealing end operation carried out by sealing bars 1 and 2 are sandwiched by film abutting parts 19 at anteroposterior positions sandwiching the sealing bars 1 and 2 and are pulled toward the outside. Holding members 4 have first holding parts 6 and second holding parts 7. At an anteroposterior position sandwiching the sealing bars 1 and 2 when the tubular film 5 is sandwiched by the sealing bars 1 and 2, the first holding parts 6 sandwich the tubular film 5 over a predetermined range of a width-direction center part of the tubular film 5 at a position near the sealing end position of the tubular film 5. In both sides of the first holding parts, the second holding parts 7 are distant from the position of the tubular film 5 held by the first holding parts 6 toward a film conveyance direction, and the second holding parts 7 provide space S including the part sandwiched by the sandwiching members 14 between the side surfaces of the sealing bars 1 and 2 and the holding parts and sandwich the width-direction both sides of the tubular film 5. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a wrinkle that prevents wrinkles from occurring when an end seal is applied to a cylindrical film in a horizontal bag making and filling machine that packs articles by sending them into a cylindrical film formed into a cylindrical shape at predetermined intervals. The present invention relates to an improvement technique for a take-off device.

  As an apparatus for preventing wrinkling of a film when end-sealing with a horizontal bag making and filling machine, the apparatus according to Patent Document 1 immediately before heat-sealing a tubular film by an upper and lower seal member in an end seal mechanism. The film correction members disposed on both sides come into contact with the tubular film to remove wrinkles of the tubular film. Further, in the apparatus according to Patent Document 2, the upper and lower end sealers sandwich the edges on both sides of the end-sealed portion before sandwiching the packaging film, and then pull the edges outward. The film is sealed with an end sealer.

For example, goods such as hail and peanuts that are packed in small bags, or one or several pieces of rice crackers that are individually wrapped in a bag, etc. Pillow packaging is performed as a collective article accommodated by a horizontal bag making and filling machine. As in such a collective article, in a packaging part in which the bag width is set to a large size, even if any of the above methods is adopted, wrinkles of the film generated at the time of end sealing are prevented over the entire bag width. In many cases, it is difficult to prevent wrinkles, especially when the upper bulges of the contents are different on the left and right in the bag width direction. As a result, it has been a factor in causing defective packaging such as inducing poor sealing of the bag and reducing the sealing performance, or deteriorating the appearance of the packaging and reducing the product value.
Japanese Patent Laid-Open No. 2004-238042 Japanese Patent Publication No. 2-30926

  In view of the above-mentioned conventional problems, the present invention is difficult to prevent the occurrence of wrinkles in other cases where the bag width is particularly large and the bulges above the articles contained in the bag are different from each other. An object of the present invention is to provide an apparatus that can satisfactorily prevent wrinkling of a film that occurs at the time of end-sealing even if the product is packaged.

  The wrinkle removing device for the end seal portion of the horizontal bag making and filling machine according to the invention of claim 1 is a downstream side of the tubular film 5 sandwiched between the front and rear positions of the article supplied in the tubular film 5. A pair of seal bars 1 and 2 that end-seal the tubular film 5 while moving toward the end are provided, and the sandwiching member 14 and the pressing member 4 are configured. The clamping member 14 moves inward from both outer sides intersecting the film conveyance path, and seals both side edges of the tubular film 5 crushed by a predetermined amount by the end sealing operation by the seal bars 1 and 2. The film is held by the film contact portion 19 at the front and rear positions between which the bars 1 and 2 are sandwiched and pulled outward. When the cylindrical film 5 is sandwiched between the seal bars 1 and 2, the presser member 4 is positioned close to the end seal position of the tubular film 5 at the front and rear positions sandwiching the seal bars 1 and 2. A first presser portion 6 that sandwiches the central portion in the width direction over a predetermined range, and both sides of the first presser portion 6 from the press position of the tubular film 5 by the first presser portion 6 toward the film transport direction. A second presser portion 7 that is spaced apart and is provided with a space S including a clamping portion by the film contact portion 19 of the clamping member 14 between the side surfaces of the seal bars 1 and 2 and sandwiches both sides in the width direction of the tubular film 5. And.

In the second aspect of the invention based on the first aspect of the present invention, the clamping member 14 has an elastically deformable finger portion 20 that supports the film contact portion 19.
In the invention of claim 3 premised on the invention of claim 1 or claim 2, the film contact portion 19 of the holding member 14 is made of an elastic member, and the holding member 14 uses the tubular film 5 as its film contact portion. It is pinched at 19 and pulled while sliding.

  The presser member 4 according to the invention of claim 4, which is based on the invention of any one of claims 1 to 3, wherein the second presser part 7 is a tubular film from the left and right ends of the first presser part 6. 5 is formed so as to extend in an inclined manner away from the seal bars 1 and 2 toward both side edges in the width direction.

  In the invention of claim 5 premised on the invention of any one of claims 1 to 4, the second presser portion 7 of the presser member 4 has a sandwiching interval of the tubular film 5 of the tubular film 5. A pressing surface 9 is provided so as to expand toward the side edge in the width direction.

  In the first aspect of the present invention, the first presser portion 6 prevents the wrinkle of the central portion in the width direction of the tubular film 5, and the portion spaced from the seal bars 1 and 2 from the presser position by the first presser portion 6. Is pressed with the second presser 7 so that the tubular film 5 is pushed and expanded from both sides in a predetermined region from the end seal position to both front and rear ends of the article accommodated in the tubular film 5, and the seal Even when the tubular film 5 is sandwiched between the bars 1 and 2, the first pressing portion 6 and the second pressing portion 7 do not sandwich the tubular film 5 and the pair of pressing members 4 have a predetermined gap G between them. Therefore, the effect of holding and pulling the tubular film 5 with the holding member 14 can be obtained to the maximum. Therefore, even in the packaging of articles having a large bag width, it is possible to eliminate the wrinkle of the film generated at the time of end sealing over the entire bag width and to make a good packaging state without impairing the appearance of the packaging. it can. In particular, the effect of applying to the packaging of an article having an uneven upper bulge due to the difference in height between right and left of the bag width is great.

  According to the second aspect of the present invention, since the finger portion 20 is elastically deformed when the tubular film 5 is sandwiched by the sandwiching member 14, the sandwiching member 14 corresponds to the variation in the sandwiching portion in the vertical thickness and the difference between the sandwiching thicknesses on the left and right. The finger part 20 is familiar with the tubular film 5 and can securely pinch the side edges of the tubular film 5, so that the generation of wrinkles in the tubular film 5 can be prevented even better.

  In the invention of claim 3, when the tubular film 5 is sandwiched by the sandwiching member 14, the tubular film 5 is damaged even if the elastic member of the film abutting portion 19 is slid on the surface of the tubular film 5. In other words, the tubular film 5 can be stretched by an appropriate frictional force with the tubular film 5 to prevent the generation of wrinkles.

  In invention of Claim 4, while being able to make the presser member 4 which consists of the 1st presser part 6 and the 2nd presser part 7 into one simple structural member, the seal bars 1 and 2, the 2nd presser part 7, It is possible to prevent the generation of wrinkles satisfactorily in a state where the space S between them is stretched in a substantially planar shape.

  In the invention of claim 5, the second presser portion 7 of the presser member 4 does not hold the tubular film 5 flat in the width direction, but loosens the presser on both sides in the width direction of the tubular film 5 by the widening of the gap G. Therefore, when the side edge part of the tubular film 5 is pinched and pulled outward, the side edge part of the tubular film 5 can be reliably stretched.

  In a horizontal bag making and filling machine, after a strip film drawn from a film roll is formed as a cylindrical film, a center seal is applied to the cylindrical film, and articles are placed in the cylindrical film at predetermined intervals. The upper and lower seal bars 1 and 2 are moved up and down in synchronization with each other as the cylindrical film 5 is fed to the end seal device shown in FIGS. A so-called box motion motion that advances and retreats along the conveyance direction of the film-like film 5, and sequentially moves the downstream side by sandwiching the front and back positions sandwiching the articles in the tubular film 5 by the upper and lower seal bars 1, 2, An end seal is applied in the width direction of the tubular film 5 that intersects the conveying direction of the tubular film 5, and the tubular film is cut by a cutter, It is adapted to obtain the goods.

  As shown in FIGS. 2 (a), 2 (b), 2 (c), and 2 (d), plate-like pressing members 4 attached to both the upstream and downstream sides of the cylindrical film 5 in the transport direction. A first presser portion 6 extending so as to linearly press a position close to the end seal position of the tubular film 5 by the seal bars 1 and 2 at the center in the width direction of the tubular film 5; The first presser portion 6 is bent integrally from both ends, and is inclined so as to gradually move away from the seal bars 1 and 2 toward the film conveying direction as it goes toward both side edges in the width direction of the tubular film 5. And has a second pressing portion 7 that presses both sides in the width direction of the tubular film 5. A space S is formed between the second pressing portion 7 and the seal bars 1 and 2, and the space S is opened in the vertical direction and outward. When the cylindrical film 5 is sandwiched between the upper and lower seal bars 1 and 2, in the pair of upper and lower presser members 4, the pressing surface 8 of the first pressing portion 6 extends adjacent to the seal bars 1 and 2 in parallel with each other. A predetermined gap G is formed between them, and the pressing surface 9 of the second pressing portion 7 has a gap G with a gap between them toward the outer side in the width direction of the tubular film 5. It is formed so as to be inclined linearly so as to spread gradually. The pair of upper and lower pressing members 4 are set to dimensions capable of pressing substantially the entire region between both side edges in the width direction of the tubular film 5 when the tubular film 5 is sandwiched between the opposing gaps G. It is preferable that the length is set to be slightly smaller than or longer than the width of the tubular film 5 at that time.

  The upper and lower seal bars 1, 2 are respectively arranged so as to be movable forward and backward integrally with the forward and backward movement of the tubular film 5 in the forward and backward directions in the transport direction of the tubular film 5 on the outer sides on the left and right of the transport path of the tubular film 5. A movable table 12 is attached to the inner ends of a pair of movable shafts 11 supported so as to be movable in the width direction with respect to the fixed table 10. The movable table 12 has upstream and downstream sides of the seal bars 1 and 2. A clamping means 13 having a pair of upper and lower clamping members 14 disposed on both sides in the width direction and an air cylinder 15 as an operating means for opening and closing the clamping member 14 are attached. In this clamping means 13, the clamping member 14 is attached to a pair of upper and lower opening / closing plates 17 supported so as to be pivotable in the vertical direction about the support shaft 16, and the upper and lower opening / closing plates 17 together with the clamping member 14. The torsion coil spring 18 is opened in the vertical direction by the biasing force of the torsion coil spring 18. In each clamping member 14, a film contact portion 19 made of an elastic member such as cushion rubber is detachably attached to the distal end portion of the elastically deformable finger portion 20 made of a leaf spring or the like. The air cylinder 15 is provided with a conical head 21 that moves forward and backward with respect to between the two opening / closing plates 17, and the head 21 is retracted and clamped between the two opening / closing plates 17 as shown in FIG. When the head 21 moves forward between the two open / close plates 17 as shown in FIG. 3B from the state in which the member 14 is open, the upper and lower open / close plates 17 together with the clamping member 14 resist the biasing force of the torsion coil spring 18. They are designed to close each other. The movable table 12 moves forward together with the clamping means 13 and the air cylinder 15 by the urging force of the tension coil spring 22, and when the operation wire 23 connected to the movable table 12 is pulled by a tension mechanism (not shown), the tension coil spring 22 The movable base 12 moves backward together with the clamping means 13 and the air cylinder 15 against the urging force.

In addition, by controlling the operation of the air cylinder 15, the clamping timing of the tubular film 5 by the clamping means 13 can be changed and set as necessary.
As shown in FIG. 1 (a), a pair of upper and lower clamping members 14 in the retracted positions on both sides of the conveyance path of the tubular film 5 on the upstream side and downstream side of the seal bars 1, 2 are shown in FIG. 1 (b). In conjunction with the end seal operation shown in FIG. 3, the cylindrical film 5 is moved by the upper and lower seal bars 1 and 2 as shown in FIG. Immediately before clamping, the film abutting portions 19 provided on the finger portions 20 of the upper and lower clamping members 14 sandwich both side edges in the width direction of the tubular film 5 and pull the clamping member 14 outward. At that time, the elastic member of the film contact portion 19 changes the holding position in the tensile direction with an appropriate frictional force with the surface of the tubular film 5 and pulls it outward. When the upper and lower seal bars 1 and 2 are close to each other and the upper and lower pressing members 4 sandwich the cylindrical film 5, the cylindrical film 5 has the first pressing portion 6 and the second pressing portion 7 of the pressing member 4. The tubular film 5 is sandwiched between the pressing surfaces 8 and 9. Next, as shown in FIG. 3 (c), immediately after the tubular film 5 is sandwiched between the upper and lower seal bars 1 and 2, the film contact portions 19 of the upper and lower clamping members 14 are positioned on both sides in the width direction of the tubular film 5. Release the edge. Even if the upper and lower seal bars 1 and 2 sandwich the tubular film 5, the tubular film 5 is configured to be held in the gap G between the upper and lower pressing members 4. Can be obtained just before the tubular film 5 is sandwiched between the seal bars 1 and 2, and the tubular film 5 can always be held in a stretched state during sealing. In the upper and lower presser members 4, the first presser part 6 presses a position close to the end seal part at the center in the width direction of the tubular film 5, and the second presser part 7 is on both sides of the tubular film 5 in the width direction. The cylindrical film 5 is sandwiched from above and below so as to press the position of the first presser 6 away from the seal bars 1 and 2 in the direction along the film transport direction. Therefore, even in the packaging of articles that require packaging with a large bag width, film wrinkles that occur during end-sealing should be eliminated over the entire bag width, and the packaging should be in good condition without impairing the appearance of the packaging. Can do.

For example, the following embodiment may be configured as follows.
In the presser member 4, the first presser portion 6 and the second presser portion 7 are provided integrally, but they may be arranged separately from each other.

  In the presser member 4, the second presser part 7 extends straight from the first presser part 6 and is linearly provided in parallel with the first presser part 6 without being inclined, and the seal bars 1 and 2 and the second presser part A space S may be provided between the two.

The advance / retreat of the clamping member 14 and the opening / closing movement of the clamping member 14 may be linked by a common drive source.
-The structure which advances / retracts the clamping means 13 with respect to the cylindrical film 5 can employ | adopt the air cylinder and the operation system by a motor other various systems instead of the wire operation system of embodiment.

  In the presser member 4, the presser surfaces 9 of the upper and lower second presser portions 7 are linearly provided in parallel to each other without being inclined in the vertical direction, and a gap G between the presser surfaces 9 is provided in the upper and lower first presser portions. You may provide by the same dimension from the clearance gap G between the 6 holding surfaces 8 continuously.

(A) is a partial front view which shows the end seal apparatus which employ | adopted the wrinkle removal apparatus, (b) is a partial side view similarly. (A) is a partial front view showing a state in which the seal bar is engaged, (b) is a partial enlarged front view of (a), (c) is a partial plan view, and (d) is a partial enlarged plane of (c). Figure. (A) is a partial front view showing a state immediately before completion of engagement of the seal bar, (b) is a partially enlarged front view of (a), (c) is a partial front view showing the engagement completion state, and (d) is a partial front view. The partial enlarged front view of (c).

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1, 2 ... Seal bar, 4 ... Pressing member, 5 ... Cylindrical film, 6 ... 1st presser part, 7 ... 2nd presser part, 14 ... Holding member, 19 ... Film contact part, 20 ... Finger part, S ... Void, G ... Gap.

Claims (5)

Horizontal bag making and filling with a pair of seal bars that end seal the tubular film while holding the tubular film and moving toward the downstream side at the front and back positions sandwiching the article supplied in the tubular film In the machine
The film abuts on both side edges of the cylindrical film that has been moved inward from both outer sides intersecting the film conveyance path and crushed by a predetermined amount by the end seal operation by the seal bar at the front and back positions sandwiching the seal bar A clamping member that is clamped by the portion and pulled outward,
A first presser that sandwiches the central portion in the width direction of the tubular film over a predetermined range at a position close to the end seal position of the tubular film at a position before and after the seal bar is sandwiched when the tubular film is sandwiched by the seal bar. Film contact of the holding member between the side of the sealing bar and the side of the seal bar on the both sides of the first pressing portion and spaced from the pressing position of the tubular film by the first pressing portion toward the film conveying direction. A wrinkle removing device for an end seal part in a horizontal bag making and filling machine comprising a presser member provided with a second presser part provided with a space including a clamping part by a part and sandwiching both sides in the width direction of the tubular film. 2. The wrinkle removal device for an end seal part in a horizontal bag making and filling machine according to claim 1, wherein the clamping member has an elastically deformable finger part that supports the film contact part. The horizontal bag making according to claim 1 or 2, wherein the film abutting portion of the clamping member is made of an elastic member, and the clamping member is clamped by the film abutting portion and pulled while sliding. A wrinkle removing device for an end seal in a filling machine. The said press member WHEREIN: The 2nd press part was formed so that it might extend so that it might be spaced apart from a seal bar toward the width direction both sides edge part of a cylindrical film from the right-and-left both ends of a 1st press part. The wrinkle removing device for an end seal part in the horizontal bag making and filling machine according to any one of the above. The second pressing portion of the pressing member includes a pressing surface that is set so that a sandwiching interval of the cylindrical film is widened toward the side edge in the width direction of the cylindrical film. A wrinkle removing device for an end seal portion in the horizontal bag making and filling machine described in the above.

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