JP4754302B2 - Product holding belt device and packaging machine using the same - Google Patents

Description

  The present invention relates to a product holding belt device and a packaging machine using the same.

  There are various types of packaging, and along with this, there are various types of packaging machines. For example, a pillow packaging machine has the following configuration. First, the strip-shaped film wound up by the raw fabric roll is continuously supplied to the bag making device, and when the bag making device is passed, the tubular film formed into a tubular shape is formed. In addition, an article transporting and supplying device is arranged on the upstream side of the bag making device, and an object to be packaged conveyed at predetermined intervals from the object to be packaged conveying and supplying device is supplied into the bag making device. Accordingly, when the article to be packaged passes through the bag making machine, the article to be packaged is stored at predetermined intervals in the cylindrical film, and the article to be packaged is conveyed together with the cylindrical film. A center seal device and an end seal device are arranged along the conveying direction. The center seal device seals the film polymerization end of the cylindrical film (the film portion where the both side edges of the strip film are overlapped). The end seal device seals the tubular film in the lateral direction of travel (portion where the front and rear packages are not present) and cuts the portion of the tubular film in which the front package is stored. Is separated from the subsequent cylindrical film to produce a package. In addition, there is also an apparatus in which a product restraining belt device is disposed above the conveyance path on the upstream side immediately before the end seal device so as to suppress the object to be packaged contained in the cylindrical film from being lifted.

  In the case of this pillow wrapping machine, as described above, the film polymerization ends are heat-sealed by the center seal device to form one tubular film, and the packaged items are placed in the tubular film at predetermined intervals. By arranging and end-sealing / cutting the film part between the front and back objects to be packaged, one package is manufactured by one end-sealing / cutting process.

  On the other hand, the present inventor passed the bag-shaped film through the bag making machine to form a cylindrical shape, and then centered both sides of the film in a cylindrical shape at the center seal device. As shown in FIG. 1, it was considered to produce two parallel tubular films 1, 1. A center seal portion 2 is formed between the two tubular films 1 and 1. Then, by cutting the center seal portion 2 during the conveyance, the tubular films 1 and 1 are separated into two pieces and conveyed, and then the predetermined portion is end-sealed and cut by the next-stage end seal device. I thought of a packaging machine. Thereby, two package bodies are manufactured by one end seal / cut process.

In addition, as a packaging machine provided with the function of forming two parallel cylindrical films 1 and 1 as shown in FIG. 1 during the packaging process, it is not a horizontal packaging machine targeted by the present invention. There is an invention disclosed in Document 1.
Japanese Patent Laid-Open No. 51-112690

  However, the configuration in which end sealing is performed after the two parallel cylindrical films 1 and 1 are cut along the traveling direction of the center seal portion 2 has the following problems. That is, for example, even when the product restraining belt device is arranged upstream of the end seal device, the product restraining belt device can suppress the movement in the direction perpendicular to the film traveling direction, but the film traveling It is impossible to suppress movement in the left-right (horizontal) direction that is substantially perpendicular to the direction.

  Therefore, the two cylindrical films (each containing a packaged object) that have been separated by the center seal portion being cut by the slit device are cut again by the slit before reaching the end seal device. There is a risk of close proximity and, in some cases, overlap. And if it supplies to an end-seal apparatus in this state, there exists a problem which causes the welding defect by the overlap of a film. That is, in the state of being properly separated, the overlap of the film in the end seal device is two sheets, and the welding by the sealer is uniformly applied with pressure (seal pressure) by welding the overlapping parts. If the above-mentioned film overlap occurs, the overlap of the film at the time of welding becomes four pieces, and as a result, the two pieces and the four pieces are simultaneously contained at the time of sealing. Therefore, there is a problem that a uniform pressure (sealing pressure) cannot be obtained and a suitable welding state cannot be obtained.

  Furthermore, when the above-described overlap occurs, the film cannot enter perpendicularly to the cutting direction, but enters obliquely, and is cut obliquely in the cutting process in the end seal device, and a good packaging body There is also a problem that it cannot be obtained.

  In the packaging machine in which two separated cylindrical films are conveyed in parallel and subjected to end seal processing, the present invention reliably heat seals the cylindrical films and cuts a desired position. An object of the present invention is to provide a product restraining belt device and a packaging machine using the product restraining belt device.

In order to achieve the above-described object, a product restraining belt device according to the present invention is located upstream of an end seal device of a packaging machine and above a conveying surface on which two cylindrical films are conveyed in parallel. A product restraining belt device to be disposed, wherein each of the two tubular films contains a product (corresponding to the “packaged object 19” in the embodiment) , and above the tubular film. An endless belt that contacts and prevents the packaged object in the tubular film from being lifted upward, and a mechanism that rotationally drives the endless belt, and the belt surface of the endless belt goes to the center in the width direction. It was configured to protrude as much as possible.

  Here, the shape is configured to protrude, but as shown in the embodiment, it may be an inclined surface formed on a flat surface, or may be curved or appropriately uneven, but is an inclined surface as a whole. A thing may be sufficient, and it can take various shapes, such as making it step shape.

  And while the said belt surface is equipped with the said inclined surface on both sides, it is good for a center site | part as the horizontal flat surface which cooperates both the inclined surfaces. Of course, a flat surface may not be provided, or a curved surface may be used instead of the flat surface. In addition, the shape of the inclined surface is not limited to a planar shape as in the above-described embodiment, and may take various forms such as a curve.

  By adopting such a configuration, it is regulated that the two separated cylindrical films move to the center side by the protruding portion, and the end seal process can be performed without overlapping both.

  A mechanism for moving the endless belt up and down may be provided. In this way, the position of the protruding portion can be changed by adjusting the height of the belt surface, and the tubular films are surely brought closer to each other according to the dimensional shape of the tubular film (packaged object). Thus, it is possible to suppress the overlapping, and it is preferable because the tubular films can be positively adjusted to be separated from each other by a predetermined distance. Of course, such a function may not be provided.

  The packaging machine according to the present invention has a means for forming a continuously supplied strip-shaped film into a cylindrical shape, and heat-sealing both side edges of the strip-shaped film formed in the cylindrical shape to the central portion of the strip-shaped film, A center seal device that forms two connected tubular films, and a portion that is disposed downstream of the center seal device and sealed by the center seal device or in the vicinity thereof is separated into two tubular films. A vertical cutter device, any one of the above-described product restraining belt devices disposed on the downstream side of the vertical cutter device, and disposed on the downstream side of the product restraining belt device, sealing in the width direction of the tubular film An end seal device for cutting was provided.

  In the embodiment, the end seal device is configured to perform the sealing process and the cutting process at a time, but each of them may be performed separately. Moreover, the packaging machine which mounts the product holding | suppressing belt apparatus which concerns on this invention is not restricted to the packaging machine which concerns on this invention mentioned above, It can apply to various packaging machines.

  The present invention provides a packaging machine in which two separated cylindrical films are conveyed in parallel and subjected to an end sealing process, and the cylindrical films are prevented from approaching and overlapping each other, and the end of the next stage The sealing device can surely heat-seal both cylindrical films and cut a desired position.

2 to 6 show a preferred embodiment of the present invention. The packaging machine 10 according to the present embodiment is disposed on the upstream side of the packaging machine body 11, the film supply device 12 that continuously supplies a belt-like packaging film to the packaging machine body 11, and the packaging machine body 11. And a packaged article transport and supply device 14 that supplies the packaged article 19 to the packaging machine body 11 at predetermined intervals.

  The film supply device 12 links the output of a drive motor (not shown) (speed-controllable motor such as a servo motor) to the original roll 16 obtained by winding the belt-like film 15 into a roll. Supplying to the packaging machine body 11 at a constant speed while appropriately controlling the rotation speed. Further, various rollers 13 are arranged at predetermined positions from the original fabric roll 16 to the packaging machine body 11, and the belt-like film 15 fed out from the original fabric roll 16 is passed over the rollers 13, thereby providing a predetermined path. It is guided to the packaging machine main body 11 through. Of course, in the present invention, it is not always necessary to link the drive motor to the raw roll 16, and a feed roller may be provided on the transport path of the packaging film and pulled out.

The to-be-packaged article conveyance supply device 14 is configured to include a pulley 17 disposed at a predetermined position in the front and rear, and an endless belt 18 that is stretched over the plurality of pulleys 17. As a result, the articles to be packaged placed on the endless belt 18 at predetermined intervals move forward with the rotation of the endless belt 18 and are sequentially supplied to the packaging machine body 11 at the next stage. As shown in FIGS. 3 and 4, the objects to be packaged 19 are transported at equal intervals in the front-rear direction in a state of being arranged in two rows in the packaging machine body 11. Therefore, although not shown in the figure, this packaged article conveying and supplying apparatus 14 is also conveyed and supplied in a state of being arranged in two rows. In the present embodiment, the article transport / supply device 14 is composed of a belt conveyor device provided with the endless belt 18, but it is needless to say that a finger conveyor device and other various transport devices can be used.

  The packaging machine main body 11 includes a bag making device 20 that sets the strip-shaped film 15 supplied upstream thereof into a cylindrical shape. By passing through the bag making device 20, the belt-like film 15 is lifted so that both side ends are curved upward along the bag making device, and is produced in a cylindrical shape. At this time, both side edges 15a of the belt-like film 15 are set to be close to each other in a non-contact manner while being positioned on the upper center side (see FIG. 4). That is, in the case of a normal pillow packaging machine, both side edges of the strip-shaped film 15 formed into a cylindrical shape overlap each other with sealable surfaces, but in this embodiment, both side edges 15a are respectively cylindrical. It is made to oppose the center part of the strip | belt-shaped film 15 bag-formed in the shape. Further, similarly to a normal pillow packaging machine, the packaged article conveyance supply device 14 sequentially supplies the packaged articles 19 conveyed in two rows to the bag making machine 20. Thereby, the both-sides end where the strip | belt-shaped film 15 was turned | folded comes to cover the upper direction of each to-be-packaged object 19, respectively.

  On the downstream side of the bag making machine 20, a conveyance path 22 that constitutes a conveyance surface of the cylindrical film 21 that encloses the article to be packaged 19 is arranged. A pinch roller 23, a center seal device 24, and a vertical cutter device 25 are arranged from the upstream side at an appropriate position in the center of the conveyance path 22. The pinch roller 23 is composed of a pair of upper and lower rollers, and sandwiches both side edges 15a of the strip-shaped film 15 formed in a cylindrical shape and the central portion of the strip-shaped film 15 facing it with a predetermined pressure from above and below to form a cylindrical shape. A conveying force is applied to the band-shaped film 15 that has been formed.

  The center seal device 24 is located on the upper side of the strip-shaped film 15 formed in a cylindrical shape, and is located on the lower side of the large-diameter disc-shaped center sealer 24a and the strip-shaped film 15 formed in a cylindrical shape. And is composed of two small disc-shaped holding rollers 24b (arranged in the front-rear direction). With the center sealer 24a and the restraining roller 24b arranged vertically, the both side edges 15a of the strip-shaped film 15 formed into a cylindrical shape and the central portion of the strip-shaped film 15 facing each other are sandwiched from above and below with a predetermined pressure. At the same time, it is heated at a predetermined temperature. Thereby, the both side edge 15a is heat-sealed to the film part which each opposes, and the said sealed part turns into the center seal | sticker part 21a. In addition, the two side edges 15a are sealed by the center seal portion 21a, whereby two cylindrical films 21 connected to the left and right are formed from the strip-shaped film 15 that is packed into one large cylindrical shape. become. And the to-be-packaged object 19 is included in these two cylindrical films 21, respectively.

  The vertical cutter device 25 is for cutting the central portion of the center seal portion 21a, that is, between the two tubular films 21 connected to the left and right, and a slit cutter 25a located on the upper side of the tubular film 21, It is comprised from the receiving blade 25b located in the downward side of the cylindrical film 21. FIG. The center seal portion 21a is sandwiched from above and below with a predetermined pressure by the slit cutter 25a and the receiving blade 25b arranged vertically. Thereby, the center seal | sticker part 21a is cut along the advancing direction of a film, and the left and right cylindrical films 21 are isolate | separated.

  On the downstream side of the vertical sealing device 25, the two separated cylindrical films 21 are supported, and a belt conveyor 26 to be conveyed and a product restraining belt device 30 are arranged above the belt conveyor 26, and further, An end seal device 27 and a carry-out conveyor 29 are disposed on the downstream side.

  The end seal device 27 seals and cuts the tubular film 21 in a direction orthogonal to the traveling direction, that is, in a transverse direction. The film part to be sealed / cut is a predetermined position between the front and back objects 19 to be packaged. Thereby, by passing through the end seal device 27, the leading portion of the tubular film 21 is separated from the subsequent portion, and the package 28 is manufactured. The manufactured package 28 is carried out by a carry-out conveyor 29. Further, since the left and right tubular films 21 are supplied to the end seal device 27, two packaging bodies 28 are manufactured.

5 and 6 show an enlarged view of the product restraining belt device 30 which is the main part of the present invention. The product restraining belt device 30 according to the present embodiment is disposed in the immediate vicinity of the upstream side of the end seal device 27, suppresses the packaged object 19 in the tubular film 21 from being lifted upward, and maintains a horizontal state. It can be transported while. This function is the same as that of a general product restraining belt device.

  Here, in the present invention, the product restraining belt device 30 has a basic configuration in which an endless belt 32 is stretched over pulleys 31 arranged at the front and rear, and the cross-sectional shape of the endless belt 32 protrudes toward the center. It is a leg trap shape. That is, the inclined surface 32a is provided on both sides, and the center is a flat surface 32b. By providing the inclined surface 32a in this way, as shown in FIG. 6, the two tubular films 21 are in contact with the inclined surface 32a and are prevented from moving further to the center side (slightly outside). To move). Therefore, it can suppress reliably that the center seal | sticker part 21a overlaps because the two separated cylindrical films 21 depend on the center side.

  Further, in the present embodiment, the screw 34 connected to the handle 34 is rotated by rotating the handle 34 provided above the machine frame 33 associated with the product restraining belt device 30 in the forward and reverse directions. A cylindrical female screw 36 connected to 35 is required to move up and down. The product restraining belt device 30 can be moved up and down by connecting the product restraining belt device 30 to the female screw 36. By moving up and down in this way, the separation state of the two cylindrical films 21 can be controlled. That is, the lower the cylinder film 21 is, the more the two cylindrical films 21 can be moved outward from each other, and the center seal portions 21a can be reliably prevented from overlapping. The position of the product restraining belt device 30 in the height direction is appropriately set depending on the size and shape of the article 19 to be packaged contained in the tubular film 21.

  In the present embodiment, the drive source of the product restraining belt device 30 is the same as that of the belt conveyor 26. That is, the output of the servo motor or other drive motor 40 is transmitted to the product restraining belt device 30 and the belt conveyor 26 by a power transmission mechanism including a power transmission belt (chain) 41. Accordingly, the product restraining belt device 30 and the belt conveyor device 26 can be easily rotated at a constant speed, and can be stably conveyed with the tubular film 21 sandwiched from above and below. Moreover, it is possible to prevent movement in the vertical direction and the horizontal direction (particularly the center side) during the conveyance.

It is a figure which shows the state formed in the middle of the packaging process of the apparatus which this invention makes object. It is a figure which shows the whole packaging machine which shows suitable one Embodiment of this invention. It is a front view which shows the packaging machine main body of this Embodiment. It is a top view which shows the packaging machine main body of the form of this invention. It is a front view which mainly shows the goods suppression apparatus of this Embodiment. It is a side view which mainly shows the goods suppression apparatus of this Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Packaging machine 11 Packaging machine main body 12 Film supply apparatus 13 Roller 14 Packaged article conveyance supply apparatus 15 Band-shaped film 19 Packaged article 20 Bag making machine 21 Cylindrical film 21a Center seal part 30 Product restraint belt apparatus 31 Pulley 32 Endless belt 33a Inclined surface 33b Flat surface

Claims (4)

A product restraining belt device disposed upstream of an end seal device of a packaging machine and above a conveying surface on which two cylindrical films are conveyed in parallel,
Each of the two tubular films contains a product ,
An endless belt that contacts above the tubular film and prevents the product in the tubular film from lifting upward ;
Equipped with a mechanism to rotate the endless belt,
A product restraining belt device comprising a belt surface of the endless belt that protrudes toward the center in the width direction.   2. The product restraining belt device according to claim 1, wherein the belt surface is provided with inclined surfaces on both sides, and the central portion is a horizontal flat surface that cooperates with both inclined surfaces.   The product restraining belt device according to claim 1, further comprising a mechanism for vertically moving the endless belt. Means for forming a continuous strip-like film into a cylindrical shape;
A center seal device that heat seals both side edges of the strip-shaped film formed in the cylindrical shape to the central portion of the strip-shaped film, and forms two connected cylindrical films;
A vertical cutter device that is arranged on the downstream side of the center seal device, and cuts the portion sealed by the center seal device or the vicinity thereof and separates it into two cylindrical films;
The product restraining belt device according to any one of claims 1 to 3, which is disposed on the downstream side of the vertical cutter device,
A packaging machine comprising an end seal device disposed downstream of the product restraining belt device and sealing and cutting in the width direction of the tubular film.

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