JP2920780B2 - Method for producing bottle packaging bag and apparatus used in the method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method and an apparatus for manufacturing a bottle packaging bag using a heat-shrinkable film.

More specifically, a continuous heat-shrinkable packaging bag is used in which a heat-shrinkable film packaging bag is placed over the mouth of a narrow-mouthed bottle from above, and then heat-shrinked to pack the bottle in a bottle shape with the shrinkage force of the film. It concerns manufacturing.

[Prior Art] Conventionally, packaging of bottles in which a heat-shrinkable film bag is covered from the top of the bottle and heat-shrinked in the bottle shape has been widely performed.

As shown in FIG. 6, the bag used here has a shape in which one of the tubular film sheets is closed by fusion and the other is left open as it is, and the fusion closing edge T has an arched curve. The feature is that it is.

In general, the bottle has a narrow mouth, and if the closed portion of the bag is not formed into an arched curved shape, the corner of the bag film will be excessively lifted from the surface of the packaging bottle when heat shrinked, and the appearance will be poor.

The packaging of the bottle with the heat-shrinkable film bag is such that the packaging film shrinks as it is in the shape of the bottle. At the time of shrinkage, the bottle cap is fixed and functions as a so-called virgin seal. If printing is performed on the bottle, it also functions as a bottle label, which is difficult to print directly on the bottle surface.

Conventional packaging of bottles with heat-shrinkable film bags
As shown in FIG. 7, a packaging bag with scrap pieces S formed by fusing the closure portion T in an arch shape as shown in FIG. 7 is manufactured and stacked, and then the scrap pieces S are manually peeled off. As a bag R as shown in the figure, a stack of the bags R is temporarily stored in a bag supply box of a packaging machine, and the bags are taken out one by one into a packaging table, and the bags are manually placed on the outside of a predetermined bottle from above. Then, the bag was shrunk by heating and packed.

This method has drawbacks in that the bag manufacturing process and the packaging process require manpower, and the bag manufacturing process and the packaging process are discontinuous, resulting in poor efficiency.

[Problems to be Solved by the Invention] The present invention solves the above-mentioned drawbacks of the conventional method, and can produce a heat-shrinkable packaging bag for a bottle continuously and efficiently from a long film sheet while saving labor. It is an object to provide a method and an apparatus for use in the method.

[Means for Solving the Problems] The inventors of the present invention have found that the reason why the bag manufacturing process could not be continuously performed in the conventional method is that a scrap piece S of a cut portion shown in FIG. In order to ascertain that there is a major cause at the point where the scraps could not be mechanically removed, and to remove the scraps, cuts on both sides of the scraps indicated by the straight lines A and B in FIG. It has been found that if the scrap pieces are simultaneously separated from the film ends on both sides, the processing of the scrap pieces S becomes easy and the scrap pieces can be smoothly discharged out of the manufacturing process.

 The present invention has been completed based on these findings.

That is, the present invention consists of the following items.

1. The end of a long tubular film sheet made of a heat-shrinkable film is intermittently fed out onto a cutting and fusing worktable by the length of a cutting unit, and the leading end of the tubular film sheet is placed on the table. An arch-shaped blade for fixing a predetermined position and cutting a closed edge of a bag to be manufactured at a position inside only a cutting unit from the tip and an opening of a bag of another unit provided at an interval from the arch-shaped blade A sliding block in which a pair of cutting blades including a straight blade that cuts an edge is fixed so that the blade tip surfaces are aligned on a horizontal plane is lowered onto the film sheet surface, and a pair of cutting blades is used to move the film from the film tip. A cylindrical film and a scrap piece of a predetermined unit length are cut off, and the scrap pieces cut on both sides simultaneously by the cutting blade are mechanically discharged from a cutting table, and almost simultaneously with the cutting operation, the inside of the arch-shaped cutting blade is removed. Along the high temperature A packaging bag for bottles, characterized in that the bag is continuously manufactured by pressing an arch-shaped fusion pressing blade mold against the film and fusing the edge of the film of the cylindrical film to form a closed portion of the bag. Production method.

2. The scrap piece discharging method is such that, when the sliding block descends and the cutting blade cuts the film, the scrap receiver is raised from below the cutting and fusing base surface so as to contact the lower surface of the film, and is provided on the scrap receiver. The scrap pieces that have been cut off by the intake holes are released and held on the scrap piece receiver, and when the sliding block rises, the scrap piece receiver is lowered, and after the descent, the pressure is released and the scrap pieces are released. 2. The method for producing a bottle packaging bag according to claim 1, wherein the scrap pieces are discharged by removing the released scrap pieces with an air stream or a scraping jig.

3. A scrap piece discharging method is a method of synchronizing when a sliding block descends and a cutting blade cuts a film, thereby creating an air flow, and discharging the scrap pieces cut and released by the air flow downward. 2. The method for producing a bottle packaging bag according to claim 1, wherein

4 A device for intermittently supplying the leading end of a long tubular film sheet made of a heat-shrinkable film to the cutting and fusing device for each bag unit length, and the leading end of the film in synchronization with the intermittent supply of the film sheet. Means for intermittently fixing the portion on the cutting and fusing table, wherein an arch-shaped blade for cutting the periphery of the closed portion of the bag and a straight-shaped blade for cutting the opening of the bag of another unit are provided. A sliding block having a tip fixed on the same plane, wherein an arc-shaped fusion-pressing die having a curved shape substantially the same as that of the arch-shaped blade along the inside of the arch-shaped blade; The horizontal block has a sliding block fixed at a position with a level difference from the horizontal plane of the cutting edge, and the sliding block is synchronized with the timing when the leading end of the long film sheet is fixed to the cutting and fusion work table. The film is reciprocally slid down and up to A cutting and fusing apparatus having a mechanism for separating a packaging bag and scrap pieces from a tip and fusing an arched edge of the separated bag side, and having a means for discharging the scrap pieces cut off at this time. For manufacturing bottle packaging bags.

(5) The scrap discharging means is a means for receiving a scrap piece which rises to the film surface in synchronization with the lowering operation of the sliding block and descends in synchronization with the raising operation of the sliding block. An intake hole that can hold the piece by suction is provided, a suction is activated when the scrap piece receiver rises, and there is a mechanism that releases the suction when the scrap receiver descends. 5. The bottle packaging bag manufacturing apparatus according to claim 4, further comprising a mechanism for discharging the scrap pieces released by the airflow or the scraping jig out of the scrap receiver in synchronization.

6. The bottle packaging bag manufacturing apparatus according to claim 4, wherein the scrap piece discharging means is an air flow generator that operates in synchronization with the lowering operation of the sliding block.

The heat-shrinkable film bag manufactured by the present invention is obtained by closing one of the cylindrical films by fusing, and the closed portion is formed in an arched curved shape. Here, the arch shape is appropriately selected according to the shape of the bottle to be applied, and is a curve such that the corners of the film do not rise to the surface of the bottle when the bottle is covered from above with heat shrinkage. The shape corresponds to the arch shape of the present invention.

The material of the heat-shrinkable film used in the present invention is a thermoplastic resin film, for example, a uniaxial or biaxially stretched film such as polyethylene, polypropylene, polyester, polystyrene, or polyvinyl chloride, and has a shrinkage ratio of 5 to 85.
%, Preferably about 5 to 50%.

 The present invention will be described in more detail with reference to the drawings of embodiments.

1 and 2 show an example of the apparatus of the present invention. This apparatus cuts the opening A of the bag, cuts the edge B of the arched closure, and cuts the arch into the film sheet shown in FIG. This is an apparatus for producing a heat-shrinkable bag for a bottle by performing fusion of the closed portion T, perforation of the air hole K and perforation M, and smooth removal of the scrap pieces S.

The apparatus according to the present embodiment mainly includes a base plate 1 having a scrap piece discharge hole 2 in the center, a sliding block 9 that slides on a support fixed thereto by the operation of a piston of a cylinder 5, and a discharge hole 2 of the base plate 1. And a scrap receiver 4 provided as scrap piece discharging means.

The sliding block 9 is fixed with the straight blade 7, the arch-shaped blade 8, and the arch-shaped fusion pressing die 3 heated by the heater 11. The cutting edges of the straight blade 7 and the arched blade 8 are fixed so as to be on the same horizontal plane, and the tip of the arched fusion-pressing die 3 is on a horizontal plane slightly higher than the horizontal plane of the tips of both cutting blades. It is fixed to the sliding block 9.

The sliding block 9 is slid up and down by the piston operation of the cylinder 5, and at its lowermost position, the tips of the fusion-pressing die are in close contact with the surface of the base plate 1, and the tips of both cutting blades are on the surface of the base plate 1. And project from the edge of the central hole from the level of.

The positional relationship between the scrap receiver 4, the straight blade 7 and the arched blade 8 with respect to the hole at the center of the base plate 1 is as shown in FIG. 4 which is a projection view from above. That is, the straight blade 7 and the arch-shaped blade 8 are provided at positions protruding between the edge of the discharge hole 2 and the edge of the scrap receiver 4. Therefore, the ends of both cutting blades do not hit the table.

The curved shape of the edge D is the same as the curve of the shape of the closed portion T of the bag or the arcuate cutting line B of the scrap piece, but the interval between the edge C and the edge D of the hole is slightly wider than the width of the scrap film. I have.

The interval between the edges E and F of the hole is wider than the width of the film sheet.

The edge D serves as a support for the arch-shaped fusion pressing die 3.

In addition to the above, the sliding block 9 of this embodiment is provided with a sewing machine blade 13 and an air hole needle 10.

The function of the apparatus according to the present embodiment is as follows. First, the leading end of a tubular long film sheet is intermittently supplied to the base plate 1 by a conventional method. For example, a method that uses a roll that operates periodically for a fixed period of time, or a phototube detects a print mark on a film sheet, sends it out, stops the pinch roll, and rotates the pinch roll again in conjunction with the operation of ending the cutting and fusing work And the like.

The feed amount of the heat-shrinkable film sheet in the present invention at one time corresponds to the length of a unit to be cut.

In synchronism with the supply of the leading end of the film sheet, the film holders 14, 15, and 16 located at three positions before, in the middle and after the two cutting blades of the present embodiment lower to the surface of the base plate 1, and Is fixed on the table.

In synchronism with the lowering of the film holder, the scrap receiver 4 rises and, in response to the intermediate film holder 15, sandwiches and fixes the film that is to become a scrap piece.

When the scrap receiver 4 comes into contact with the film, the suction hole provided on the upper surface of the scrap receiver 4 starts suction and sucks the film.

In this way, cutting and fusing are performed after the front end of the film sheet is fixed to the surface of the base plate 1, so that the film is not displaced by the tension of the film at the time of cutting.

The sliding block 9 descends slightly later than the lowering of the film holder. At this time, the straight blade 7 and the arched blade 8 cut the film sheet to separate the scrap pieces S from the film sheet.

Almost simultaneously with this cutting, the fusion stamp 3 is pressed against the arched cutting edge of the film to fuse the film to form a closed portion of the bag.

The scrap pieces S separated from the film sheet by the cutting are sucked and held on the scrap receiver 4. The scrap receiver 4 is lowered in the opposite direction with the rise of the sliding block 9, and when it reaches the position of the injection nozzle 6, the suction is released and the scrap pieces S are released. At this time, air is injected from the injection nozzle 6 and / or the suction hole of the scrap receiver, and is discharged to the scrap piece reservoir by an air flow. Instead of the injection nozzle, a method of mechanically scraping scrap pieces can also be adopted.

As a means for discharging scraps of the present invention, an air flow flowing out of the system from a discharge hole of the base plate 1 may be generated by an air flow generating device such as a decompression pump or a compression pump without performing suction by a scrap receiver. it can.

On the other hand, as the sliding block 9 is raised, the film holders 14, 15, and 16 are also raised to release the manufactured bag and the front end of the next unit film sheet from the base plate.
The manufactured bag is transferred to the next step, and thereafter, the leading end of the film sheet to be the next unit bag advances, and the same steps are repeated.

In the manufacturing method and the apparatus according to the present embodiment, the straight blade, the arch-shaped blade and the arch-shaped fusion-pressing die are arranged in the order of the flow of the supply film sheet. Arrangement in the order of straight blades is also one of the embodiments of the present invention.

In practice, the method and apparatus of the present invention are preferably implemented as part of a series of packaging steps as shown in FIG.

That is, the heat-shrinkable film on the left side of FIG. 5 has a predetermined cutting length intermittently formed on the base plate 1 of the packaging bag manufacturing apparatus by intermittently applying the leading end of the film sheet from the rolled film sheet 21 wound with a long tubular film. Transfer every pitch. This cutting length can be selected according to the size of the bottle and the width of the scrap portion.

The intermittent transfer of the film sheet from the roll film is performed by a pair of pinch rolls 23. The pinch roll can be stopped by detecting a print mark on the film sheet by the photoelectric tube.

The printing device 22 provided immediately before the pinch roll 23 can print the date of manufacture on the film sheet.

Next, the bag manufactured by the above-described method using the packaging bag manufacturing apparatus of the present invention is transferred to the next bottle filling apparatus.

The bag supplied to the bottle filling device opens the opening by suctioning both outer surfaces of the opening with the vacuum pad 30, and the vacuum pad 30 is placed on the right side of the filling table in FIG. 5 while holding the opening. The flapper 31 is transported to the tip and fitted therein.

On the other hand, the bottom of a cylindrical bottle 33 to be packaged is fixed to a vacuum pad at the tip of a rod 32 connected to a vacuum pump by a vacuum pad 34, and the bottle is placed in a flapper 31 with the head first. It is pushed while rotating 32.

When the tip of the bottle reaches the tip of the closed part of the bag, the vacuum pad, which was sucking the edge of the opening, is released from the reduced pressure, and when the rod is pushed in again, the opening of the bag slips off the flapper.

At this time, the hot air nozzle 35 provided near the center of the
Hot air is blown from the vicinity of the opening of the bag on the bottle to partially shrink the bag opening and temporarily fix the bag.

In this way, the bottle with the packaging bag temporarily fixed by partial shrinkage is transferred, for example, by a conveyor to the shrink tunnel 36, and then passes through the high-temperature shrink tunnel 36, so that the entire surface of the bottle is heat-shrinkable. The film comes into close contact with each other to obtain a desired packaging bottle.

[Effects of the Invention] In the production of a bottle packaging bag from a heat-shrinkable film sheet by the production method and apparatus of the present invention, scrap pieces can be continuously and smoothly removed. The advantage that the manufacturing efficiency is improved is obtained.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment of the apparatus of the present invention, FIG. 2 is a side view of the apparatus, FIG. 3 is a view showing a work place where the apparatus is applied to a cylindrical film, and FIG. FIG. 5 is an overhead view from above showing the positional relationship between the straight blade, the arched blade, the scrap receiver, and the leading end of the film sheet with respect to the discharge hole of the base plate of the apparatus of the embodiment. FIG. FIG. 14 is an explanatory view showing all steps of performing
The figure is a perspective view of a heat-shrinkable bag used for bottle packaging, and FIG. 7 is a plan view of a conventional intermediate product for producing a bottle packaging bag. Reference numerals in the drawing are 1; base plate, 2; discharge hole, 3; fusion-push type, 4; scrap receiver, 5; cylinder, 6; injection nozzle, 7; straight blade, 8; arch-shaped blade, 9; Motion block,
10; air hole needle, 11; heater, 12; piston, 13; sewing machine blade,
14; film holder, 15; film holder, 16; film holder, 17; support, 18; plate, 19; film sheet.

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Seio Okawa 2-2-1 Otemachi, Chiyoda-ku, Tokyo Sumitomo Heavy Industries, Ltd. (72) Inventor Yasuto Ito 2-chome Otemachi, Chiyoda-ku, Tokyo No. 2 Sumitomo Heavy Industries, Ltd. (56) References JP-A-62-101425 (JP, A) JP-A-51-472 (JP, A) JP-B-36-17337 (JP, B1) 40-1189 (JP, Y1) (58) Fields investigated (Int. Cl. ⁶ , DB name) B65B 53/00-53/06 B31B 1/00-49/04 B65B 9/00-9/24

Claims (6)

(57) [Claims] An end of a long cylindrical film sheet made of a heat-shrinkable film is intermittently fed out onto a cutting and fusing work table by a length of a cutting unit, and a front end of the cylindrical film sheet is cut out. An arcuate blade fixed at a predetermined position on the table and cutting the edge of the closed portion of the bag to be manufactured at a position inside only the cutting unit from the tip, and another unit provided at an interval from the arcuate blade A pair of cutting blades consisting of a straight blade for cutting the opening edge of the bag is fixed to the film sheet surface with a pair of cutting blades fixed so that the blade tip surfaces are aligned on a horizontal plane. A cylindrical film and a scrap piece of a predetermined unit length are cut off from the front end of the film, and the scrap pieces, both sides of which have been cut simultaneously by the cutting blade, are mechanically discharged from a cutting table. Along the inside of the cutting blade A bottle for continuously manufacturing bags by pressing a high-temperature arch-shaped fusion-pressing blade mold against the film and fusing the edges of the film of the cylindrical film to form a closed portion of the bag. Manufacturing method of packaging bag. 2. The scrap piece discharging method is characterized in that, when the sliding block is lowered and the cutting blade cuts the film, the scrap receiver is raised from below the cutting and fusing table surface so as to contact the lower surface of the film. The scrap pieces cut and released by the suction holes provided in the scrap receiver are suction-held on the scrap piece receiver, and when the sliding block rises, the scrap piece receiver is lowered, and after the descent, the decompression is released. The method for producing a bottle packaging bag according to claim 1, wherein the method is a method for discharging scrap pieces by releasing the scrap pieces and removing the released scrap pieces by an air stream or a scraping jig. 3. A scrap piece discharging method is synchronized with a sliding block descending and a cutting blade cutting a film.
2. The method for producing a bottle packaging bag according to claim 1, wherein the method is a method of producing an air flow and discharging the scrap pieces cut and released by the air flow downward. 4. A device for intermittently supplying the leading end of a long tubular film sheet made of a heat-shrinkable film to a cutting and fusing device for each unit length of a bag, and in synchronization with the intermittent supply of the film sheet, Means for intermittently fixing the leading end of the film on the cutting and fusing table, an arch-shaped blade for cutting the periphery of the closed portion of the bag, and a linear blade for cutting the opening of the bag in another unit; A sliding block in which the tips of the two blades are fixed so as to be on the same plane, and an arc-shaped fusion-pressing die having a curved shape substantially the same as that of the arch-shaped blade along the inside of the arch-shaped blade. The pressing die has a sliding block having a horizontal surface fixed to a position having a step with the horizontal surface of the cutting edge, and in synchronization with the timing when the front end portion of the long film sheet is fixed to the cutting and fusion work table, Slide the sliding block down and up A cutting and melting device having a mechanism for separating the packaging bag and the scrap pieces from the tip of the film, and fusing the arched edge of the separated bag side, and having means for discharging the scrap pieces cut off at this time. An apparatus for manufacturing packaging bags for bottles consisting of a dressing device. 5. The scrap piece discharging means is a scrap piece receiving means which rises to the film surface in synchronization with the lowering operation of the sliding block and descends in synchronization with the raising operation of the sliding block. The scrap is provided with an intake hole capable of sucking and holding the scrap pieces, and has a mechanism in which the suction is activated when the scrap piece receiver is raised and the suction is released when the scrap receiver is lowered. 5. The bottle packaging bag manufacturing apparatus according to claim 4, further comprising a mechanism for discharging the scrap pieces released by the airflow or the scraping jig out of the scrap receiver in synchronization with the suction release of the bottle. 6. The apparatus according to claim 4, wherein the scrap discharging means is an air flow generator which operates in synchronization with the lowering operation of the sliding block.