JP2013169987A - Film packaging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a film packaging device facilitating to perform operation for heat sealing a superposed part of a film folded inside by packaging, without rolling down of a package from a packaging part.SOLUTION: In a film packaging device with a packaging part B for pushing up a packaged object W from below against a stretched film 2 to cover a surface of the packaged object with the film and folding inside a peripheral edge of the film toward the bottom face side of the packaged object by folding plates 4a, 4b, a peripheral wall 5 of a height projecting upward beyond the folding plates is disposed around the packaging part B, sensors 6 for sensing presence/absence of the package to be packaged by the packaging part are disposed on the peripheral wall 5, a heater part F heat-sealing a superposed part of the film on the bottom face of the packaged object which is folded inside by the packaging part is disposed on an upper part of the peripheral wall, and further a guide part G slidably guiding the package to the heater part F is provided between the heater part F and a packaging face of the packaging part B.

Description

  The present invention relates to a film packaging apparatus that draws and stretches a film from a film roll, pushes up a packaged object from below and packages the spread film, and heat-seals the film on the bottom surface of the packaged article.

The film drawn from the film roll is cut to a predetermined length and stretched on the packaging portion, the packaged object is pushed up from below with respect to the stretched film, and the surface of the packaged object is covered with the film, and further the film There is a film wrapping apparatus that wraps and wraps the peripheral edge of the wrapping material on the bottom side of the package with a folding plate (see, for example, Patent Document 1).
In the film wrapping apparatus described in Patent Document 1, the left and right peripheral edges of the film covering the surface of the packaged object are folded to the bottom surface side of the packaged object by the folding plate, and then the film on the rear side by the rear folding plate. Fold the periphery, and finally push the package to the front side of the device with a pusher, the front film periphery is folded to the bottom side, the package is discharged from the packaging part to the front side of the device, and placed in the discharge part The heater is pressed against the overlapping portion of the film folded on the bottom surface of the package, and heat sealed.

However, in the case where the packaged item is a product having a curved surface such as cabbage, Chinese cabbage, or apple, for example, the package that has been pushed out by the pusher to complete the packaging rolls down in the discharging process from the packaging unit to the front side of the apparatus. There is a case.
Therefore, the packaging operation is completed in the region of the packaging unit so that the package does not fall down during the discharge process from the packaging unit to the front side of the apparatus, and the packaging surface of the packaging unit (for example, a folding plate) It is conceivable that the product having the curved surface is prevented from falling off by surrounding it with a higher member.

However, when configured as described above, the package that has been packaged is once lifted and moved onto the heater unit disposed on the front side of the apparatus, and the overlapping portion of the film folded on the bottom surface of the package is moved to the heater unit. To heat seal the overlapping portion of the film.
Therefore, in order to move the package to the heater part, it is necessary to once lift the package upward, and it is assumed that workability is lacking.

JP 2005-119696 A

  The present invention has been made in view of the above-described problems of the prior art, and the package does not roll off from the packaging portion, and the heat sealing operation of the overlapping portion of the film folded in the packaging is easily performed. An object of the present invention is to provide a film wrapping apparatus that can be used.

In order to solve the above problems, the film packaging apparatus of the present invention pushes up an object to be packaged from below with respect to the stretched film, covers the surface of the object to be packaged with the film, and surrounds the periphery of the film with a folding plate. In the film wrapping apparatus provided with a wrapping part that is folded into the bottom side of the packaged item,
A peripheral wall having a height protruding above the folding plate is disposed around the packaging part, and a sensor for detecting the presence or absence of a package packaged in the packaging part is disposed on the peripheral wall, and the peripheral wall A heater portion for heat-sealing the overlapping portion of the film on the bottom surface of the packaged object folded at the packaging portion is disposed on the upper portion of the packaging portion, and further, the heater portion is placed between the heater portion and the packaging surface of the packaging portion. It is characterized by having a guide part for sliding and guiding.
Examples of the form of the guide section include a form in which a plurality of freely rotating rollers are laid in parallel, a form in which a belt that rotates endlessly is laid, a form in which a flat plate having good slip is laid.

The number and position of the sensors arranged on the peripheral wall surrounding the packaging part are not particularly limited as long as the presence or absence of a package in the packaging part can be detected.
Further, the position of the heater part for heat-sealing the overlapping part of the film folded on the bottom side of the package may be disposed on any of the rectangular peripheral walls surrounding the packaging part, but preferably Is preferably on the side of the carry-in part (the front side of the apparatus) for supplying an article to be packaged.

According to the above means, the periphery of the film covering the surface of the packaged object is folded into the bottom surface side of the packaged object by the folding plate, and the packaged material is slid on the guide unit from the packaging surface of the packaging unit. By moving, the overlapping portion of the film folded on the bottom surface of the package can be guided onto the heater portion and pressed against the surface of the heater portion. In particular, in a packaging type apparatus in which the package is pushed up on the stretched film and the bottom surface of the package is folded from the front and rear direction of the package by a folding plate, and the folded film hangs down to the center of the bottom surface. The slidable film is slid on the guide part as it is, so that the hanging film is naturally pressed against the bottom surface of the package and is guided to the heat seal part in the pressed state. The In other words, the film is easily and reliably guided only by the operation of guiding the film from the packaging portion to the heat sealing portion without the operator pressing the hanging film against the bottom of the package by hand and then sealing the heat sealing portion. Can be heat sealed.
Further, since the peripheral wall is erected around the packaging part, the article to be packaged does not roll down from the packaging part even if the article to be packaged is a curved cabbage or apple. And since a sensor is arrange | positioned at the said surrounding wall and the presence of the thing in a packaging part is detected, even if the packaging material of a packaging part is removed in the condition where an operator's hand is located in a packaging part, a packaging apparatus (For example, a folding plate) is not driven, and therefore there is no danger to the operator's hand.

The guide portion may have a fixed inclination angle of the guide surface extending from the packaging surface of the packaging portion to the heater portion, but may be capable of changing the inclination angle of the guide surface or changing the position in the front-rear direction. Specific examples of the position change include a slide type and a drawer type.
In that case, the package can be smoothly guided toward the heater portion by adjusting the inclination angle of the guide portion in accordance with the size of the article to be packaged.

The film packaging apparatus of the present invention can smoothly move the package to the heater portion regardless of the peripheral wall arranged around the packaging portion, and easily overlap the overlapping portion of the film folded on the bottom surface side of the packaging portion. Can be pressed and heat sealed.
In addition, since the sensor for detecting the presence of an object (a packaged item, an operator's hand, etc.) in the packaging part is arranged on the peripheral wall, an operator's hand exists in the packaging part. Since the presence of the hand is detected by the sensor even when the package in the packaging unit is removed, the packaging device is not driven and safety can be ensured.

The external appearance perspective view which shows an example of embodiment of the film packaging apparatus which concerns on this invention. FIG. FIG. Explanatory drawing which shows the movement of the package from a packaging part to a heater part. The other example of a guide part is shown, (a) is the example which shortened the length of the guide part, (b) is the example which lengthened the length of the guide part.

Hereinafter, an example of an embodiment of a film packaging apparatus according to the present invention will be described with reference to the drawings.
FIG. 1 is an external view showing an outline of a film packaging apparatus. A carry-in part A for placing an article W to be packaged is disposed on the front side (front side) of the machine frame 1, and a film 2 for packaging the article W to be packaged. A packaging unit B that is pulled out and expanded horizontally is disposed at the upper part of the machine frame 1, and a transport base C that transports the package W received from the carry-in unit A to the packaging unit B is a driving mechanism. It is supported by D and arranged in the machine casing 1 so as to be movable in the horizontal and vertical directions.
Further, a film supply unit E for supplying the film 2 used for packaging is disposed above the packaging unit B, and a film roll 2 ′ is rotatably supported by the film supply unit E. Furthermore, a heater part F for heat-sealing the film of the package W ′ is arranged at a position above the carry-in part A in the peripheral wall 5 surrounding the packaging part B, and between the heater part F and the packaging part B A guide part G for guiding the package W ′ to the heater part F is arranged.

The transport table C moves horizontally below the loading portion A on which the article W is placed by the horizontal operation of the driving mechanism D, and then moves vertically upward by the vertical operation of the driving mechanism D. A package W is received from A. And the said conveyance stand C which mounted the to-be-packaged object W is moved to the downward direction of the film 2 hold | maintained horizontally by the said packaging part B by the horizontal operation | movement of the said drive mechanism D, and then raises to the perpendicular direction Is moved upward toward the film 2 of the packaging part B, the packaged object W is pushed up onto the film 2, and the surface of the packaged object W is covered with the film 2.
The peripheral edge of the film 2 that covers the surface of the package W is the bottom side of the package W by the operation of the folding means 4 (front / rear folding plate 4a, left / right folding plate 4b) disposed in the packaging unit B. And the end of the folded film is pressed against the heater part F arranged around the packaging part and heat-sealed to complete the packaging of the article W to be packaged in the packaging part B. Yes.

In the packaging part B, the film drawn from the film roll 2 ′ supported by the film supply part E is cut into a predetermined length, and the front and rear side edges and the left and right side edges of the cut film are sandwiched and stretched horizontally. Film holding means 3 for holding, and folding means 4 (front / rear folding plate 4a) for folding the end of the film covering the surface of the article W to be packaged to the bottom side of the article W at a position above the film holding means 3 The left and right folding plates 4b) are arranged.
And the surrounding wall 5 of predetermined height is standingly formed in four directions (front-back, left-right direction) so that the said packaging part B may be enclosed, and the thing in the said packaging part B (packaged goods W, packaged goods W ') on this circumferential wall 5 , A sensor 6 for detecting the presence of an operator's hand or the like) is disposed.
Further, a heater portion F is disposed on the upper surface of the peripheral wall 5, specifically, the upper surface of the peripheral wall 5a on the same side as the side where the carry-in portion A is disposed (the front side of the machine frame), and the heater portion F and the packaging Between the packaging surface of the part B, the guide part G which guides the package W 'in which folding of the film edge part was finished toward the said heater part F is arrange | positioned.

The peripheral wall 5 is easy to roll because the article W to be packaged in the packaging part B has a curved surface, for example, cabbage, apple or the like, and the package W ′ even when rolling occurs after packaging. Is formed at such a height that it can be prevented from rolling down from the packaging part B to the outside of the apparatus.
And the sensor 6 comprised by the light emitter and the light receiver is opposingly arranged by the side wall which this peripheral wall 5 mutually opposed, specifically the right and left peripheral walls 5b and 5c which oppose on both sides of the packaging part B. Yes.
The sensor 6 disposed on the peripheral walls 5b, 5c is on the center line of the packaging part B so as to detect the presence of an object in the packaging part B (package W, package W ', operator's hand, etc.) It is arranged at a plurality of locations (three locations in the illustrated example) spaced in the front-rear direction from the center line. While the sensor 6 detects the presence of an object (package W, package W ′, operator's hand, etc.) in the packaging part B (the light from the light emitter is blocked by the object, the light emitter In the state where the light is not received by the light receiver), the next article W to be packaged (operation of the driving mechanism D) or the operation of the folding means 4 is stopped, and the safety of the work is ensured. ing.

  The guide portion G is located between the vicinity of the peripheral wall 5a on the near side of the left and right folding plate 4b disposed on the upper side of the folding means 4 disposed in the packaging portion B and the heater portion F installed on the upper surface of the peripheral wall 5a. , And the guide W can be moved by sliding the package W ′ from the packaging part B to the heater part F on the peripheral wall 5a. For example, as shown in the figure, a pair of left and right support frames A plurality of rollers 7b are installed between 7a so as to be rotatable and horizontally and parallel to each other. And the conveyance surface formed of the said roller 7b is arrange | positioned so that an inclined surface may be comprised over the surface of the said heater part F from the surface of the said right-and-left folding plate 4b.

The guide part G may be fixed between the vicinity of the peripheral wall on the near side of the left and right folding plate 4b and the heater part F, but depending on the size of the package W ′, the length of the guide part G (packaging The length of the inclined surface from the part surface to the heater part) may be adjusted.
Since the article W to be packaged is packaged at the approximate center of the packaging part B by the carrier C operated by the drive mechanism D, the distance to move the article W ′ after packaging to the heater part F is the article W to be packaged. Varies depending on the size. That is, in the case of a small package, the moving distance becomes long, and in the case of a large package, the moving distance becomes short.
Therefore, by allowing the length of the guide part G to be adjusted according to the size of the package W ′, the sliding guide to the heater part F can be performed smoothly.

  Examples of a mode in which the length of the guide portion G can be adjusted include a pull-out type (see FIGS. 5A and 5B). And when the length of the guide part G is adjustable, the angle of the inclined surface from the surface of the packaging part B to the heater part F naturally changes, and the position of the guide part G on the packaging part B (on the inclined surface starting end side). Position) also moves in the front-rear direction.

  As shown in FIGS. 5 (a) and 5 (b), the pull-out type guide portion G ′ is configured like a chain with a roller mounted on a pair of bendable frames, for example, and the guide portion G ′ is a heater. The part F is stored in the peripheral wall 5 on which the part F is mounted. Then, the guide portion 8 is pulled out by a necessary length in accordance with the size of the package W ′, and the start end portion and the end portion of the pulled length are engaged with the left and right peripheral walls 5. It should be noted that a plurality of positions where the start end portion is engaged may be formed in advance at predetermined intervals, and the engagement position may be selected according to the length of the guide portion 8.

According to the illustrated embodiment of the present invention, the surface of the article to be packaged W is covered with the film 2 by the packaging part B, and the peripheral edge of the film 2 is the bottom side of the article W to be packaged by the folding means 4. The package W ′ that is folded in and covered with the film 2 is placed on the closed left and right folding plate 4b positioned on the upper side of the folding means 4. Thereby, the operator holds the package W ′ on the left and right folding plates 4b by hand and slides on the guide part G (or the guide part G ′) extending from the packaging part B toward the heater part F on the peripheral wall 5. By doing so, the package W ′ can be smoothly guided and moved to the heater portion F. And the overlapping part of the film 2 in the bottom part of package W 'can be contacted to the heater part F, and can be heat-sealed.
A series of operations for moving the package W ′ from the packaging part B to the heater part F on the peripheral wall 5 is smoothly performed by the guide part G regardless of the height difference (gap) between the packaging surface of the packaging part B and the peripheral wall 5. Can be done.
That is, when the package W is covered with the film at the approximate center of the packaging part B with the front and rear folding plate 4a, the packaging is completed, and the package is taken out from the packaging part, as shown in FIG. In addition, the film folded on the bottom surface of the package by the front / rear folding plate 4a hangs downward from the front / rear folding plate 4a. Then, by allowing the package having the sagging film to slide on the guide portion as it is, the sagging film is naturally pressed against the bottom surface of the package, and in a pressed state, heat sealing is performed. Guided to the department. In other words, the film is easily and reliably guided only by the operation of guiding the film from the packaging portion to the heat sealing portion without the operator pressing the hanging film against the bottom of the package by hand and then sealing the heat sealing portion. Can be heat sealed.
When the length of the guide part G is adjustable as shown in FIG. 5, the length of the guide part G ′ can be varied according to the size of the package W ′. The sliding guide can be performed efficiently.
Further, even if the package W ′ is a cabbage or apple having a curved surface that is easy to roll, since the peripheral wall 5 is formed upright around the package portion B, the provisional wrapping W ′ rolls. However, it can be prevented from rolling out of the apparatus.

The film packaging apparatus according to the present invention is not limited to the illustrated embodiment, and can be changed as appropriate without departing from the scope of the present invention.
(1) In the embodiment, an example in which the guide unit is integrally provided in the packaging device has been shown. However, the present invention is not limited to this. For example, a plurality of guide units having different lengths are prepared, The guide unit may be exchanged depending on the situation.
(2) In the embodiment, the example in which the guide unit is configured by a plurality of rollers has been described. However, the present invention is not limited thereto, and may be configured by, for example, a belt, a resin flat plate, or the like.
(3) In the embodiment, the example in which the heater unit is disposed on the peripheral wall on the carry-in unit side is shown, but the present invention is not limited to this. For example, either one of the left and right peripheral walls orthogonal to the position of the carry-in unit in plan view You may arrange | position on the surrounding wall.

B ... Wrapping part F ... Heater part G, G '... Guide part W ... Packaged object W' ... Package 2 ... Film 4 ... Folding means 5 ... Peripheral wall 6 ... Sensor

Claims (4)

A film packaging provided with a packaging part that pushes up an object to be packaged from below on the stretched film, covers the surface of the object to be packaged with the film, and folds the periphery of the film with a folding plate to the bottom side of the object to be packaged In the device
A peripheral wall having a height protruding above the folding plate is disposed around the packaging part, and a sensor for detecting the presence or absence of a package packaged in the packaging part is disposed on the peripheral wall, and the peripheral wall A heater portion for heat-sealing the overlapping portion of the film on the bottom surface of the packaged object folded at the packaging portion is disposed on the upper portion of the packaging portion, and further, the heater portion is placed between the heater portion and the packaging surface of the packaging portion. A film wrapping apparatus comprising a guide portion for sliding and guiding.   The film packaging apparatus according to claim 1, wherein the guide portion is configured such that an inclination angle of a guide surface from the packaging surface of the packaging portion to the heater portion can be changed.   The film packaging apparatus according to claim 1, wherein the guide portion is configured to be changeable in a front-rear direction between a packaging surface of the packaging portion and the heater portion.   The film wrapping apparatus according to any one of claims 1 to 3, wherein the guide portion includes a plurality of rollers.

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