JPH085447B2 - Vertical wrapping machine for bi-fold film - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention inserts an article to be packaged into a double-folded film which is vertically drawn out from a roll film, and simultaneously melts a horizontal seal portion and a vertical seal portion of the film by an L-type sealing device. The present invention relates to a vertical wrapping machine for double-folded film, which seals and wraps an article to be packaged by welding.

[0002]

2. Description of the Related Art Conventionally, as a vertical wrapping machine for a double-folded film having the simplest structure, a roll film of the double-folded film installed above is pulled out by a predetermined length in advance, and the lower end is first sealed in advance. Put the article to be packaged in the double-folded film and use the weight of the article to pull out the film vertically until it reaches the L-shaped sealer, and then activate the L-shaped sealer to simultaneously perform vertical and horizontal sealing and weld cutting. However, thereafter, it is known that the articles to be packaged are hermetically sealed by sequentially repeating this.

According to this vertical wrapping machine, it is necessary to form an opening for folding a folded film in order to put an article to be packed into the film, and various proposals have been made for that purpose. However, the opening mechanism of the two-folded film according to these proposals is complicated, and it is difficult to align the open ends of the film after opening, and it is necessary to give a margin to the width of the film in advance in order to cope with this end shift. Therefore, the film is being wasted.

A vertical folding machine for a double-folded film, for example, developed by the present inventor, which simplifies the opening mechanism of the film and eliminates waste of the film and enables efficient vertical packaging. There is a vertical packaging machine disclosed in Japanese Laid-Open Patent Publication No. 62-94509. The vertical wrapping machine for two-fold film disclosed in the above publication arranges two right-angled isosceles triangular film opening devices in parallel and vertically with a predetermined interval with the hypotenuse upward. An L-shaped sealer is installed below the film opening device, and a space for entering an article is left under an acute-angled tip portion formed by a hypotenuse portion and a bottom portion of the film opening device to extend to an outer portion of the L-shaped sealer. There is provided a film drawing device that aligns the open end portions of the double-folded film that is inverted and opened by the opening device and positively guides it downward.

In the packaging of articles, the folded side of the double-folded film is directed upward and the opening side is directed downward so that the opening side of the film opening device is wrapped in the opening device from above and the oblique side part is fed. The film is folded back and is inverted while being opened, and the ends of the opening side are aligned by the chain which is the film drawing device , and the film is drawn vertically downward by a predetermined length. At this time, at the same time, articles are fed into the opening, but at the start of operation, the L-shaped sealer is actuated, and a part of the double-folded film pulled out downward is previously welded in the transverse direction. Therefore, the article falling from the opening device into the bag-shaped double-folded film stops at the welded portion, and the L-shaped sealer is activated during that time so that the opening-side end and the upper part of the bag-shaped double-folded film are closed. At the same time, the fusion-cutting and sealing are performed, and the wrapped packaged article is dropped downward and appropriately discharged to the next step by the transport device.

As described above, according to the vertical folding machine for double-folded film disclosed in the above-mentioned publication, the structure of the film opening device is simple and its opening function is sure, and at the same time, the double-folding film after the reversing opening is folded. Since the opening side end portion of the film is surely pulled out by the pulling-out device, the extra film is not used as in the conventional case, and the economical effect is large.

[0007]

The vertical packaging machine disclosed in the above publication is extremely effective for packaging articles of a particular shape stored in a carton or the like, but the shape is unstable. The following problems occur when an article, for example, a seafood such as a crab or a bulk article such as an agricultural product is packed in a film by the above vertical packaging machine without being stored in a carton or the like.

During the packaging, when the ends of the loose articles, such as the legs of crabs and the tips of vegetables, which fall into the bag-shaped double-folded film, extend to the film drawing device, The legs and tips are caught between the L-shaped sealers,
Not only that part is not sealed, but also the film cutting does not work well, and the machine has to be stopped in the case of packaging failure or worst case.

Such a problem is not limited to the vertical wrapping machine disclosed in the above publication, but can also be applied to the horizontal wrapping machine disclosed in Japanese Utility Model Laid-Open No. 2-40003. In order to eliminate the above-mentioned inconveniences, the horizontal packaging machine disclosed in Japanese Utility Model Laid-Open No. 2-40003 has a fixed guide inside the seal portion in the film length direction of the L-shaped seal in the film length direction. The guide is provided so as to reduce the gap between the upper and lower films of the folded film. In this case, since it is a horizontal wrapping machine, the article sent into the film is conveyed in a conveyor shape together with the film, so the article does not move significantly inside the film, and the fixed guide described above sufficiently prevents the above-mentioned problems. Is eliminated. However, in the above vertical packaging machine, articles are dropped in the air and loaded, so that it is difficult to store the articles in a specific position inside the film, and the fixed guide does not guarantee a reliable seal.

The present invention was developed in order to solve such a problem, and an object of the present invention is to provide a vertical type for a double-folded film which enables film packaging of loose articles having an unstable shape without any trouble. To provide a packaging machine.

[0011]

In order to achieve the above object, the present invention supplies an article to be packaged into a two-folded film which is intermittently pulled vertically downward from above , and L in that state.
A vertical wrapping machine for a double fold film, in which a vertical seal portion and a horizontal seal portion of the double fold film are simultaneously welded and cut into an L shape with a mold sealer to hermetically wrap an article to be packaged,
The L-shaped sealer is arranged at a position close to the inner side of the vertical seal portion, and for sandwiching the inner side of the vertical seal portion of the bi-fold film from both sides at least between the time of supplying the article and the operation of the L-sealer. in which the operation is characterized in that it comprises a sheet <br/> Lumpur edge clamping means are made.

According to a preferred embodiment, the seal edge holding means is usually separated from the double-folded film , and the L-shaped sealer of the double-folded film is used from the time of supplying the article to the operation of the L-type sealer. Vertical sea
The opening / closing member is operated so as to be sandwiched from the front and back along the inner side of the ruled portion .

[0013]

For example, the operation of the vertical wrapping machine for two-fold film disclosed in the above-mentioned publication to which the present invention is applied will be described. Two folds are fed horizontally with the folding side up and the opening side down. The folded film is vertically inverted and opened by a film opening formed by a pair of two plate members each having a substantially right-angled triangular shape. The double-folded film has its lower end sealed beforehand by welding cutting, and is pulled vertically downward by a predetermined length in a state where the edge portion on the opening side is kept aligned by the film pull-out portion. When the film of a predetermined length is drawn out, the article is supplied into the upper-end film reversing opening and naturally falls into the bag-shaped double-folded film. At the time of supplying the article, the seal edge sandwiching means of the film, which is disposed along at least the inner side surface of the L-type sealer opposite to the film pulling-out portion, acts and inside the portion sealed by the L-type sealer. Both sides of the folded film are sandwiched so that articles falling in the bag-shaped film do not partially enter between the seal portions.

After that, the L-shaped sealer is activated to simultaneously weld and cut the upper part and the opening-side end of the double-folded film containing the article. At this time, the article is of any shape.
Even if the both ends are not disturbed by the sealing edge sandwiching means and do not enter between the L-shaped sealers, complete hermetic packaging is performed. The packaged article falls by its own weight onto a conveyor such as a conveyor belt installed below, and is discharged to the outside of the machine.

[0015]

The present invention will be described in detail below with reference to the illustrated embodiments. 1 to 8 show a vertical wrapping machine for double-folded film, which is a typical embodiment of the present invention. FIG. 1 is a perspective view of the wrapping machine, FIG. 2 is a side view of the same, and FIG. 3 is the same. FIG. 4 to FIG. 8 are enlarged perspective views centering on the film opening portion of FIG.

In these figures, reference numeral 1 is a vertical wrapping machine for double-folded film according to the present invention. The vertical wrapping machine 1 comprises a film supply section 10, a film reversing opening section 20, a packaged article supply section 30, A film drawing section 40, an L-shaped sealer 50, a seal edge sandwiching section 60, a packaged article discharging section 70, and a film cut end collecting section 80 are provided.

The film supply section 10 includes a double-folded film.
A support rod 13 for vertically loosely supporting a roll film 11 in which 12 is wound around a paper tube is erected on the upper base 2, and a large number of guides are provided between the support rod 13 and the film reversing opening 20. Laura 14
-1,14-2,14-h are also erected on the base 2 in a staggered manner. The bi-folded film 12 drawn out from the roll film 11 is guided in zigzag by the guide rollers 14-1, 14-2, 14-h and reaches the film reversing opening 20.

The film reversing opening 20 is formed by cutting out a part of the base 2 in a rectangular shape, and has two plate bodies 21 and 21 each having a substantially isosceles right-angled triangular shape in a long side portion thereof. One side to be sandwiched 21-1,21-
1 is the bottom side and the other side 21-2, 21-2 sandwiching a right angle is the last guide roller 14-h of the above guide rollers 14-1, 14-2, 14-h.
Vertically fixed so as to face each other at an appropriate interval. Folded film supplied from the film supply unit 10
12 is introduced so as to cover the plate bodies 21 and 21 from above, is folded back toward the inside of the notch at the hypotenuses 21-3 and 21-3, and is inverted, and an opening 22 is formed between the plate bodies 21 and 21. And is led out vertically downward.

The article-to-be-packaged supply unit 30 is arranged horizontally so that one end of the conveyor belt 31 faces the opening 22, and the conveyor belt 31 is operated for the operation of the film drawing unit 40 or the L-shaped sealer 50. Operates intermittently at the correct timing. A large number of articles 32 to be packaged are placed on the conveyor belt 31, which are sequentially put into the opening 22 after the operation of the L-shaped sealer 50. This packaged article supply unit 30
In addition to the above-mentioned conveyor belt 31, for example, a chain, a roll conveyor, or the like can be appropriately adopted as the supply device.

The film pull-out portion 40 is arranged so as to sandwich both opening-side edge portions 12-1 and 12-2 of the double-folded film 12 which is inverted and hung down at the film reversing opening portion 20 from the outside and which is the opening-side edge portion.
A pair of left and right chains 41,4 arranged along 12-1,12-2
2, the upper end of which is above the upper end of the frame 51 of the L-shaped sealer 50 and the opening of the film reversing opening 20.
The upper base 2 is set at a position below the notch of the upper base 2 at an interval such that insertion of the article 52 to be packaged into the container 22 is not hindered, and the lower end thereof is provided beyond the lower end of the L-shaped sealer 50. The pair of left and right chains 41, 42 is a folded film.
The opening side edge portions 12-1 and 12-2 of 12 are sandwiched from the left and right outer sides, and are intermittently driven by a driving device (not shown) in synchronization with a direction in which the double-folded film 12 is pulled out downward.

The L-shaped sealer 50 is composed of a pair of rectangular frame members 51-1, 51-2 arranged on the left and right with the central portion of the double-folded film 12 which is inverted and hung down at the film inversion opening 20. And at least one of the frame bodies 51-1, 51-2
The lower ends of 51-1 and / or 51-2 are opened, leaving a space in which the packaged article 53 can fall from the frame body to the outside. The upper frame 51-1 ', 51-2' of the pair of frame bodies 51-1, 51-2 and the side frame 51-of the opening side edge 12-1, 12-2 side of the folded film 12
A known L-shaped sealing portion is provided on each of the facing surfaces of 1 ″ and 51-2 ″. Further, the lower ends of the frame bodies 51-1 and 51-2 are pivotally supported by a shaft portion extending in the width direction of the double-folded film 12, and the upper end is opened and closed centering on the lower end shaft portion by an operating device (not shown). When the frame body 51-1, 51-2 is swung, and the frame body 51-1, 51-2 is closed, the upper portion of the bag-shaped double-folded film 12 into which the article 52 to be packaged is placed and the opening side edge portions 12-1, 12-2 are L. The packaged article 33 is completely sealed by the film by being fused and melted at the same time. Then, when the frame bodies 51-1, 51-2 are opened, the packaged article 33 inside the both frame bodies 51-1, 51-2 is self-weighted from the inside of the frame bodies 51-1, 51-2. Falls down.

The seal edge sandwiching portion 60 of the double-folded film is a characteristic part of the present invention, and as shown in FIGS.
-1,51-2 consists of a pair of left and right rod members 61-1-61-2, which are arranged at the approaching positions along the inner surface of the side frames 51-1 '' and 51-2 ''. The members 61-1 and 61-2 are configured to be opened and closed as a whole at a preset timing by an actuator (not shown).

That is, the operation procedure will be described with reference to FIGS. 4 to 8. When the film drawing section 40 is actuated to draw the double-folded film 12 to a predetermined length as shown in FIGS. As shown in the above, the pair of rod members 61-1, 61-
2 is actuated in the closing direction to clamp the inner proximity position of the sealed portion of the double-folded film 12 from the left and right. Thereafter, as shown in FIG. 7, the article 32 to be packaged is put into the bag-shaped portion of the double-folded film 12, and subsequently, as shown in FIG. After welding, the film packaging is completed. The rod member 61-
The cross section of 1,61-2 may be an appropriate shape such as a polygon or a circle, and the overall shape may be any of a square bar, a round bar, a plate, etc., and when the movement is closed, the rod members 61-1,61 -If there is no gap between the two-folded film 12 sandwiched between -2 and the two rod members 61-1 and 61-2 do not prevent the movement of the film 12 when opened,
It doesn't matter which way you move. As described above, according to the present invention, at least immediately before the article 32 to be packaged is put into the double-folded film 12 until the end of the film welding cutting by the L-shaped sealer 50, along the inside of the sealed portion of the double-folded film 12. Since the seal edge sandwiching portion 60 acts (see FIGS. 6 to 8), the packaged article 32
Even if the article is an irregularly shaped bulk article, a part of the article 52 does not reach the welding cut portion, and the L-type sealer 50 surely cuts the welding of the film 12.

The packaged article discharge unit 70 is installed on the lower base 3 at a position where the above-mentioned packaged article 33 falls, such as a conveyor belt or a roll conveyor, and receives the packaged article 33 which has fallen, and sequentially removes it from the machine. Discharge.

The film cut end collecting section 80 is composed of a film cut end winding drum 81 installed on the lower base 3 on the opposite side of the packaged article discharge section 70.
81 is driven in conjunction with the operation of the film drawing section 40, and intermittently winds the opening side edges 12-1, 12-2 of the double-folded film 12 welded and cut by the L-type sealer 50.

The above embodiment is disclosed in JP-A-62-9450.
This is an example in which the vertical packaging machine disclosed in Japanese Patent Publication No. 9 is improved, but the present invention is not limited to the above-mentioned embodiment, and for example, a guide roller or the like can be provided from a film roll without reversing the folded film. It is also applicable to a vertical wrapping machine of the type in which the article to be packaged is dropped into the folded film by an appropriate means from the portion opened by an appropriate means, the film is pulled out by the weight of the article, and is welded and cut by an L-type sealer. It is possible.

[0027]

As described in detail above, the most effective point of the present invention is that the conventional vertical wrapping machine is used to film-wrap an article whose shape is unstable, especially a loose article which is not stored in a carton or the like. If the end of the loose article that falls into the bag-shaped double-fold film extends to the vertical seal portion during packaging, the end of the article is sandwiched between the L-shaped sealers, and that portion Not only is not sealed, but also the film cutting does not work well, and there is no choice but to stop the machine in the case of packaging failure or worst, but according to the present invention, a film seal edge sandwiching portion is provided. As a result, the drawback of the conventional device is completely eliminated.

[Brief description of drawings]

FIG. 1 is a perspective view of a vertical wrapping machine for double-folded films showing a typical embodiment of the present invention.

FIG. 2 is a partially enlarged perspective view centering on a film reversing opening of the aircraft.

FIG. 3 is a side view of the aircraft.

FIG. 4 is an explanatory view showing an outline when the drawing-out of a double-folded film is started by the same machine.

FIG. 5 is an explanatory view showing an outline when the two-folded film is pulled out by the same machine.

FIG. 6 is an explanatory view showing an outline when a two-folded film is sandwiched by a film sandwiching portion of the same machine.

FIG. 7 is a schematic explanatory view of when the article to be packaged is put into the bag-shaped film by the same machine.

FIG. 8 is a schematic explanatory diagram at the time of welding cutting by an L-type sealer of the same machine.

[Explanation of symbols]

 1 Vertical wrapping machine for two-fold film 2 Upper base 3 Lower base 10 Film supply section 11 Roll film 12 Two-fold film 12-1, 12-2 Open side edge 13 Support rod 14-1 ~ 14-h Guide Roller 20 Film reversing opening 21 Plate 21-1 to 21-3 Side 22 Opening 30 Packaged article supply section 31 Conveyor belt 32 Packaged article 33 Packaged article 40 Film extraction section 41,42 Chain 50 L-shaped sealer 51- 1,51-2 Frame 51-1 ', 51-2' Upper frame 51-1 '', 51-2 '' Side frame 60 Seal edge clamping part 61-1,61-2 Rod member 70 Packaged goods Discharge section 80 Film cut end collection section 81 Winding drum

Claims (3)

[Claims] 1. A intermittently supplying the packaging article from above into the two-folded film drawn vertically downward, a longitudinal sealing portion and the lateral sealing portion of the clamshell film with a L-type sealer in its state at the same time the L-shaped A vertical wrapping machine for double-folded film, which is fusion-cut and hermetically wraps an article to be packaged, wherein the L-type sealer is disposed at a position close to the inside of the vertical seal portion and at least from the time of supplying the article for clamshell film characterized by comprising comprises a sheet <br/> Lumpur edge clamping means operation is made for between until the actuating sandwich an inner vertical seal portion of the clamshell film from both sides Vertical packaging machine. 2. The seal edge sandwiching means is normally separated from the double-folded film , and the L-shaped sheet of the double-folded film is provided from the time of supplying the article to the operation of the L-shaped sealer.
The vertical packaging machine for a two-fold film according to claim 1, which is an opening / closing member that is operated so as to be sandwiched from the front and back along the inside of the vertical seal portion by the roller . 3. The vertical structure for a double-folded film according to claim 1, wherein the seal edge sandwiching means is a fixing member fixedly arranged on both sides of the double-folded film along the inside of the vertical seal portion formed by the L-shaped sealer. Type packaging machine.