JP4682055B2 - Device for arranging objects to be packaged in skin packaging machine - Google Patents

Description

  The present invention relates to a skin wrapping machine that wraps a plurality of regular cut nonwoven sheets between two films in a vacuum environment, and relates to an apparatus that arranges the nonwoven sheets in a well-aligned manner between the two films.

  In general, the packaging machine arranges a large number of packages on a film using a jig in the front area of the vacuum chamber in order to use a large number of the same type of packages to be packaged vertically and horizontally. Each of the articles to be packaged has a drawback that it is displaced due to vibration in the process of being carried into the vacuum chamber together with the film. Therefore, in Patent Document 1 below, a plate in which a large number of depressions are arranged vertically and horizontally is formed by sucking the film with a vacuum suction force to form a large number of recesses, and each packaged article is supported in each of the recesses, An apparatus is disclosed in which a film and an object to be packaged are brought together into a vacuum chamber and vacuum packaged.

  However, in order to form the depression, the film needs to have a corresponding thickness, and it is uneconomical to wrap a thin non-woven sheet, and the surrounding corners of each of the recesses are at atmospheric pressure in the vacuum chamber. When it deforms in response, it has the problem of forming countless folds.

Utility model registration No. 3094645

  In order to solve the above-mentioned problems, the present invention seals a non-woven sheet sandwiched between two upper and lower thermoplastic belt-like films in a pressure-resistant chamber composed of two upper and lower sheets, A skin wrapping machine for vacuum-packaging a regular non-woven sheet with the two films, wherein a top plate is arranged in a lower region of the upper film and the upper film is arranged on the upper surface of the upper and lower films, while the upper film A heating plate is installed in the upper region of the surface plate with a space between the surface plate and the surface plate supporting the shape-specific nonwoven sheet in each of the shaped recesses, and the heating plate is brought close to the surface-shaped nonwoven sheet. Is bonded to the melting surface under the upper film, and then each of the regular nonwoven sheets and the upper film are integrally carried into the pressure-resistant chamber.

  The film is first softened by receiving heat from the heating plate by bringing the heating plate close to the platen that supports the non-woven sheet in each fixed depression and sandwiching the thermoplastic film. The fiber surface of each of the non-woven sheets is entangled and bonded to the softened surface. For this reason, when the surface plate and the heating plate are separated from the film, a plurality of or a large number of regular non-woven sheets are arranged and supported on the lower surface of the film. The film can be integrated into the pressure-resistant chamber.

Therefore, it is not necessary to provide the film with a thickness for forming the regular depression, which is economical in terms of the mass of the film to be used, and it is not necessary to form the depression, so that the film contracts with a differential pressure. Sometimes it has the effect of not generating wrinkles.
In order to improve the adhesive effect of two films, the thermoplastic film described in the claims of the present invention is also used in the case of using a composite film having a low melting point, for example, a polyethylene film laminated on the film surface. It is defined as including such a film.

In FIG. 1 showing the side of the apparatus, the two films move intermittently by a specified pitch in the transfer trajectory of the two upper and lower thermoplastic belt-like films 11 and 12. Between the films 11 and 12, a lift 13 formed by a pair of pneumatic cylinders is supported and arranged on a machine base 14, and each lift 13 supports a bed 15 on the top. Two guide rails 16 are provided on the upper surface of the bed 15 so as to be orthogonal to the film transfer direction, and the guide rails 16 support the surface plate 17 slidably on the upper portion.

As shown in FIG. 2, the guide rail 16 is separated at a point A into a movable guide 16A on the bed 15 and a fixed guide 16B on the frame 18, so that the movable guide 16A moves up and down independently by the lift 13. To do. A heating plate 21 disposed above the surface plate 17 across the upper film 11 is supported by an L-shaped member 22 and a rack portion 23 formed on the L-shaped member 22 is engaged with a pinion 24. The back side of the rack portion is supported by guide rollers 25 and 26.

As shown in FIG. 3, which is a plan view, a large number of square shaped recesses 20 having a depth of 2 to 3 mm are formed on the upper surface of the surface plate 17 in a vertical and horizontal manner, and the fixed shapes are formed in the recesses 20. When the non-woven sheet 30 is accommodated, each sheet 30 is arranged so as to protrude slightly from the upper surface of the surface plate 17. That is, as shown in FIG. 4, the perforated plate 29 is fixed on the surface plate 17, and the non-woven sheet 30 of the same type is accommodated in the regular recess 20 in the perforated plate 29. Note accommodation of the shaped nonwoven sheet 30 to each recess 20, the identification plate 17 holds the Handoba 27 in FIG. 3, performing Shi pull out along the up arrow 28 direction of the frame 18 to the guide rail 16. In this case, it is also possible to replace the surface plate 17 pulled out for efficiency improvement with a new stock surface plate that has already accommodated each non-woven sheet 30.

When the upper and lower films that move intermittently in FIG. 1 stop, the heating plate 21 is relatively approached by the pinion 24 and the surface plate 17 is relatively approached by the lift 13 to sandwich the upper film 11, and after the set time, The heating plate 21 and the surface plate 17 return to their home positions. As a result, the non-woven sheets 30 placed on the surface plate 17 are arranged and bonded to the lower surface of the film 11 that is melted by the heat energy of the heating plate 21, and each of the films 11, 12 is moved by the movement of the films 11, 12 thereafter. The regular non-woven sheet 30 is carried into the pressure-resistant chamber 40 in the rear area.

  As shown in FIG. 5, the pressure-resistant chamber is composed of two upper and lower members 31 and 32 that form an airtight space 33 therein. Each of the members 31 and 32 is provided with hot plates 34 and 35 inside, and both are connected to vacuum suction tubes 36 and 37.

  Therefore, when the upper film 11 having the non-woven sheet 30 bonded to the lower surface is carried between the upper and lower members 31 and 32 of the pressure-resistant chamber 40 integrally with the lower film 12, the members 31 and 32 come close to each other. Thus, each non-woven sheet 30 is isolated in the airtight space 33 and a vacuum is applied to the airtight space 33 through both vacuum suction pipes 36 and 37. In this case, since both the films 11 and 12 are not ventilated, a work in which a vacuum suction force acts between the two films is applied to the pressure resistant chamber in advance.

  Simultaneously with the progress of evacuation in the airtight space 33, softening of the upper and lower films 11 and 12 is advanced by the upper and lower heat plates 34 and 35, so that atmospheric pressure acts on the airtight space 33 through both vacuum suction pipes 36 and 37. As shown in FIG. 6, the two upper and lower films 11 and 12 are vacuum-packed in a state in which the respective non-woven sheets 30 are maintained on the surface plate in advance with the differential pressure. The purpose is reached.

  FIG. 7 shows that the upper film 51 is pulled downward from the heating plate 61, the non-woven sheet 56 is pushed together with the bed 54 and the surface plate 55 by the lift 53, and the upper film 51 is pushed up by the elevator 57. The nonwoven sheet 56 is bonded to the lower surface of the upper film 51 by the heat of the plate 61. As described above, normally, by separating the upper film 51 from the heating plate 61, the upper film 51 is not slackened by heating, and generation of wrinkles that impair the vacuum tightness can be prevented.

  The pair of elevators 57 are formed by air cylinders, and their piston rods are provided with guide rollers 58 that sandwich and support the upper film 51. The front of the guide rollers 58 has the weight described above. A tension roll 59 for maintaining the tension of the upper film 51 is provided, and the tension of the film 51 can always be maintained regardless of whether the guide roller 58 is up or down.

On the upper surface of the bed 54, as in FIG. 1, the surface plate 55 is supported via two guide rails 62 so as to be orthogonal to the transfer direction of the upper film 51. As shown in FIG. 3, a regular non-woven sheet can be accommodated in a large number of square shaped depressions on the upper surface.

  When the nonwoven sheets 56 arranged on the surface plate 55 in FIG. 7 are pressed against the heating plate 61 integrally with the upper film 51, and the adhesion of the nonwoven sheets 56 to the lower surface of the film 51 is completed, the nonwoven sheets 56 are completed. The surface plate 55 is pulled back downward again, and then the nonwoven sheets 56 sandwiched between the films 51 and 52 are carried into the pressure-resistant chamber 70 in the rear region.

  As shown in FIG. 8, the pressure-resistant chamber 70 forms an airtight space 66 in the upper and lower members 64 and 65, and when the regular non-woven sheet 56 is carried together with the two films 51 and 52, Vacuum suction is performed, and the entire non-woven sheet 56 is surrounded and heated by upper and lower frame-type heat materials 71 and 72 that are approached by the power of cylinders 67 and 68.

  As shown in FIG. 9, the frame-type heat materials 71 and 72 seal the upper and lower films 51 and 52 in a state of surrounding the non-woven sheet 56, so that when atmospheric pressure is applied to the pressure resistant chamber 70, There is no air intrusion between the two films 51 and 52, and the two films adhere to each other. However, after that, it is desirable that both the films are heated and welded to the nonwoven sheet by heaters 82 and 83 installed above and below the conveying track of the nonwoven sheet packaging 80 as shown in FIG.

Side view of the device Front view of the previous figure Partial plan view of the previous figure Partial sectional view of the surface plate Partial cross section of pressure chamber Illustration of vacuum packaged products Front view of the apparatus according to Example 2 Partial configuration diagram of pressure-resistant chamber Plan view showing the inside of the previous figure Explanatory drawing of heating device

Explanation of symbols

11... Upper thermoplastic film 12... Lower thermoplastic film 13... Lift 15... Bed 16... Guide rail 17 .. Surface plate 20 .. Shaped recess 21 .. Heating plate 24. ... Non-woven sheet 40 ... Pressure chamber 51 ... Upper thermoplastic film 52 ... Lower thermoplastic film 53 ... Lift 54 ... Bed 55 ... Surface plate 56 ... Non-woven sheet 57 ... Elevator
58 ... Guide roller 61 ... Heating plate 70 ... Pressure-resistant chamber 71 ... Frame-type thermal material 83 ... Heater

Claims (3)

The regular nonwoven sheet sandwiched between the upper and lower thermoplastic belt-like films is sealed in a pressure-resistant chamber composed of two upper and lower members, and a vacuum is applied to the sealed pressure-resistant chamber, whereby the regular nonwoven sheet is In a skin wrapping machine for vacuum wrapping with both films, an area in which the upper and lower belt-like films are pulled up and down in an area before carrying the regular nonwoven sheet integrally with the upper and lower belt-like films into the skin wrapping machine. A platen supported by a lift between the two belt-like films in this region, a heating plate placed on the platen with the upper belt-like film interposed therebetween, It consists of a number of shaped depressions arranged vertically and horizontally at a depth of 2 to 3 mm on the upper surface, and includes the upward movement of the surface plate by the lift and the downward movement of the heating plate by power. The regular nonwoven sheet disposed in each regular recess of the surface plate and the heating plate sandwich the upper belt-like film and melt it by the thermal energy of the heating plate on the lower surface of the upper film. An apparatus in which a non-woven sheet is bonded to carry the upper film and the lower film together into the pressure-resistant chamber. The regular nonwoven sheet sandwiched between the upper and lower thermoplastic belt-like films is sealed in a pressure-resistant chamber composed of two upper and lower members, and a vacuum is applied to the sealed pressure-resistant chamber, whereby the regular nonwoven sheet is In a skin wrapping machine for vacuum wrapping with both films, from the upper strip film supported by a guide roll in a region before the regular nonwoven sheet is carried into the skin wrapping machine integrally with the upper and lower strip films. An area for lowering the upper and lower belt-like films by lowering the lower belt-like film, and in a region for separating the upper and lower belt-like films, a surface plate supported by a lift between the two belt-like films; and A heating plate installed on the surface plate with the upper strip film spaced apart from the upper strip film; The upper surface of the surface plate comprises a number of regular depressions formed vertically and horizontally at a depth of 2 to 3 mm, and an elevator that supports the guide roll, and the upper belt-like film supported by the guide roll is Thus, with the action of pushing up toward the heating plate, the non-woven sheet placed in each of the shaped depressions of the platen with the lift is pushed up toward the heating plate, and the lower surface of the upper film is heated by the heat of the heating plate. In addition, the above-mentioned regular non-woven sheets are bonded together, and the upper film and the lower film are integrally carried into the pressure-resistant chamber. A movable guide rail is provided on the upper surface of the bed that is supported by a lift and moves up and down, and a movable guide rail is provided in a direction perpendicular to the transfer direction of the belt-like film, and the surface plate is slidably supported by the movable guide rail. A fixed guide rail that is separated from the movable guide rail and connected to the movable guide rail is disposed on an upper surface, and the surface plate can be pulled out of the upper film area along the both guide rails. 2. The apparatus according to 2.