JP7474497B2 - Pillow packaging machine - Google Patents

Description

The present invention relates to a pillow packaging machine.

A pillow packaging machine, which is one type of packaging machine, has the following configuration. The pillow packaging machine continuously supplies a strip-shaped film wound on a raw roll to a bag maker, and as it passes through the bag maker, it forms a cylindrical bag. A center seal device arranged downstream of the bag maker seals the overlapping ends of the film that have been formed into a cylindrical bag through the bag maker. A product conveying and supplying device is arranged upstream of the bag maker, and products conveyed from the product conveying and supplying device at predetermined intervals are supplied to the bag maker. As a result, when the products pass through the bag maker, they are stored in a cylindrical packaging film at predetermined intervals, and the products are conveyed together with the packaging film. A top seal device arranged on the discharge side of the pillow packaging machine seals and cuts the cylindrical packaging film so as to cross the horizontal direction at predetermined intervals, producing a pillow package containing the product.

This type of pillow packaging machine is disclosed in, for example, Patent Document 1. Patent Document 1 also discloses a technique for placing bearing-like rotors at the left and right ends of the inlet side of the bag maker when using packaging materials that are stiff but not very flexible, such as polycellonium, which is made by layering aluminum foil, cellophane, and polyethylene, or Pericraft, which is made by layering craft paper and polyethylene. This rotor has a rotation axis that crosses the direction in which the packaging material is transported, and the packaging material is supplied to the bag maker while hanging over the rotor. This reduces the frictional resistance between the packaging material and the rotor and guides it to the bag maker, preventing streaks from forming in the packaging material.

Japanese Utility Model Publication No. 48-31108

When a stronger material such as paper is used as the packaging material, the packaging material may float away from the inner surface of the bag maker, and the packaging material may not be able to be made into a bag along the inner surface of the bag maker. For example, in the case of a normal pillow packaging machine, the packaging material is fed into the bag maker while being conveyed diagonally downward from the upper side of the bag maker, where it is bent into a cylindrical shape that fits along the inner surface of the bag maker, and the conveying direction is changed to a horizontal direction. At this time, if the packaging material is stiff, the packaging material made into a cylindrical bag may not be bent enough when entering the bag maker, and the conveying force may be applied by pinching both side edges located at the bottom with pinch rollers, so that it cannot be changed to a horizontal direction, and it may proceed diagonally downward and separate from the ceiling surface of the bag maker, resulting in the above-mentioned situation. In an inverted pillow packaging machine in which the packaging material is supplied from the bottom of the bag maker, the same phenomenon may occur when the top and bottom are reversed. If the packaging material cannot be neatly made into a cylindrical bag, scratches such as scales may occur on the packaging material.

The above-mentioned problems are described as being independent of each other, and the present invention does not necessarily need to solve all of the problems described, but it is sufficient if it can solve at least one of the problems. In addition, we intend to obtain rights to the configuration for solving this problem separately through divisional applications, amendments, etc.

In this way, the packaging material supplied to the bag maker passes through the bag maker while being adsorbed by the suction belt device, so the packaging material can pass through the bag maker in the desired posture and position to be made into a cylindrical bag.

In order to solve the above-mentioned problems, the pillow packaging machine of the present invention (1) comprises a packaging machine main body that packages products that are supplied sequentially with packaging material, and a packaging material supply device that supplies the packaging machine main body with a strip-shaped packaging material from above or below, the packaging machine main body comprising a bag maker that forms a tubular bag from the supplied packaging material, a center seal device that is located downstream of the bag maker and seals both side edges of the packaging material by overlapping them, and a top seal device that seals and cuts the packaging material in a direction perpendicular to the conveying direction, and a suction belt device that adsorbs the portions of the packaging material opposite the both side edges as it passes through the bag maker, and the position of the belt surface of the suction belt device that contacts the packaging material is preferably equal to the position of a member that regulates the position of the portions opposite the both side edges when the packaging material is formed into a tubular bag.
(2) A packaging machine includes a packaging machine main body that packages products that are sequentially supplied with packaging material, and a packaging material supply device that supplies the packaging machine main body with a strip of the packaging material from one of the left and right sides of a conveying path, the packaging machine main body including a bag maker that forms a tubular bag so that both side edges of the supplied packaging material overlap on the other of the left and right sides of the conveying path, a center seal device that is disposed downstream of the bag maker and overlaps and seals both side edges of the packaging material, and a top seal device that seals and cuts the packaging material in a direction perpendicular to the conveying direction, and an adsorption belt device that adsorbs the portions of the packaging material opposite the both side edges as it passes through the bag maker, and the position of the belt surface of the adsorption belt device that contacts the packaging material may be set to be equal to the position of a member that regulates the position of the portions opposite the both side edges when the packaging material is formed into a tubular bag.

In this type of packaging machine, the packaging material supplied to the bag maker passes through the bag maker while being adsorbed by the suction belt device, so the packaging material can pass through the bag maker in the desired posture and position to be made into a cylindrical bag.

The product in this pillow packaging machine may be a single item, but may also be, for example, a collection of multiple flat items that are erected and aligned in a direction perpendicular to the conveying direction. The top seal device may be arranged so that the sealing surface of the top sealer extends in the vertical direction or the horizontal direction.

(4) The moving speed of the belt in the suction belt device is preferably faster than the conveying speed of the packaging material in the packaging machine body. In this way, the packaging material adsorbed to the belt surface can be conveyed in a taut state, so that the occurrence of wrinkles and scratches on the packaging material can be minimized.

(5) It is preferable to dispose an auxiliary suction belt device for suctioning the packaging material at least in front of or behind the top seal device. In this way, even if the packaging material is stiff, it can be supplied to the top seal device in a desired cylindrical shape and sealed. In this case, the drive (conveyance, suction, etc.) of the auxiliary suction belt device may be the same as that of the suction belt device, but it is more preferable to have them operate independently.

(6) It is preferable that the front end of the suction belt device in the conveying direction is located in front of the top seal device. In this way, the packaging material produced into a desired cylindrical shape by the bag maker is sucked by the suction belt device from the bag maker to the top seal device, so that the packaging material can reach the top seal device while maintaining its original state and shape.

The packaging material may be fed into the bag making machine from above, and the suction belt device may be disposed at the upper opening of the bag making machine. In this way, the packaging material to be made into a cylindrical bag can be passed through the bag making machine while the upper surface side of the packaging material is firmly lifted, and the bag can be made into the desired cylindrical shape.

(1) and (2) When the position of the belt surface of the suction belt device that contacts the packaging material is set to be equal to the position of the member that regulates the position of the portion opposite the both side edges when the packaging material is made into a tubular bag, the portion of the packaging material that has been changed in course by the member that regulates the position is adsorbed by the suction belt device in that position and is given a conveying force.

For example, in the case of a type in which the packaging material in a strip shape is supplied to the packaging machine body from above or below, the height position of the belt surface of the suction belt device that contacts the packaging material should be equal to the position of the member that regulates the height when the packaging material is made into a cylindrical bag. In this way, the part of the packaging material whose course has been changed by the member that regulates the height is adsorbed by the suction belt device at that height and is given a conveying force. In the embodiment, this regulating member corresponds to a height adjustment member. This height adjustment member moves up and down, but it may also be configured not to move up and down. Also, in the embodiment, it is in the shape of a block, but it may be a rotating body such as a roller. Furthermore, it can be configured with various things, such as the edge of the carry-in side of the bag maker.

(3) The regulating member and the belt surface may be configured to be able to approach and separate from the side of the bag making machine where the side edges of the packaging material are located. In this way, packaging bodies of different dimensions and shapes can be manufactured. In addition, for example, in the case of a type in which the belt-shaped packaging material is supplied to the packaging machine body from above or below, the height regulating member may be configured to be able to rise and fall, and the belt surface may also be able to rise and fall, so that packaging bodies of different heights can be manufactured.

According to the present invention, by passing the packaging material through the bag making machine while it is being sucked by the suction belt device, the packaging material can be made into a bag of the desired cylindrical shape, and the occurrence of wrinkles and scratches on the packaging material can be minimized.

1 is a front view showing a first embodiment of a pillow packaging machine according to the present invention; FIG. FIG. FIG. FIG. 11 is a front view showing a second embodiment of a pillow packaging machine according to the present invention. FIG. 11 is a front view showing a third embodiment of a pillow packaging machine according to the present invention. FIG.

The following describes in detail a preferred embodiment of the present invention with reference to the drawings. Note that the present invention is not to be interpreted as being limited to this embodiment, and various changes, modifications, and improvements may be made based on the knowledge of those skilled in the art without departing from the scope of the present invention.

Figure 1 shows a preferred embodiment of the pillow packaging machine according to the present invention. The pillow packaging machine 10 is configured with a product conveying and supplying device 11 and a packaging machine main body 12 arranged in that order from the upstream side, and a packaging material supplying device 14 above them.

The product conveying and supplying device 11 is formed from a finger conveyor device that conveys products 13 at regular intervals and sequentially supplies them to the packaging machine body 12 of the next stage. That is, it is configured by attaching push fingers 9 at regular intervals to an endless chain 8 stretched between sprockets 7 arranged in front and behind (only the downstream side is shown in Figure 1). Then, by supplying products 13 between the front and rear push fingers 9, the products 13 are conveyed at the finger pitch of the push fingers 9.

The packaging material supply device 14 is for continuously supplying the packaging machine main body 12 with a strip-shaped packaging material 16 for wrapping the product 13. This packaging material supply device 14 has a support means for a raw roll 15 on which the strip-shaped packaging material 16 is wound into a roll. The packaging material supply device 14 has rollers 17 for transporting the strip-shaped packaging material 16 continuously drawn out from the raw roll along a predetermined transport path and guiding it to the loading area of the packaging machine main body 12. The rollers 17 include a drive roller that applies drive to the strip-shaped packaging material 16, a tension roller that applies tension, and a free roller that changes the transport direction of the strip-shaped packaging material 16 and guides the transport.

The packaging machine main body 12 is equipped with a bag maker 22 on the carry-in side. The bag maker 22 makes a cylindrical bag from the strip-shaped packaging material 16 continuously supplied from the packaging material supply device 14. Here, as the packaging material 16 passes through the bag maker 22, both side edge portions 16a of the packaging material 16 are overlapped and the both side edge portions 16a protrude below the conveying surface of the bag maker 22. The detailed configuration of the bag maker 22 will be described later.

Meanwhile, the products 13 successively conveyed out of the product conveying and supplying device 11 are supplied into the bag making machine 22. As a result, the products 13 are supplied at predetermined intervals into the packaging material 16 that is being made into a cylindrical bag, and thereafter, the products 13 are conveyed together with the film while still contained within the packaging material 16 that has been made into a cylindrical bag.

The packaging machine main body 12 further includes a center seal device 23 downstream of the bag maker 22. The center seal device 23 seals the overlapped portion of the tubular packaging material 16 that has passed through the bag maker 22 and been made into a bag. The center seal device 23 includes a pair of pinch rollers 23a that sandwich the overlapped portion of the tubular packaging material 16 and apply a conveying force, a pair of bar-shaped center sealers 23b that sandwich and heat the overlapped portion from both sides, and a pair of press rollers 23c that are disposed downstream of the center sealers 23b and pressurize and cool the overlapped portion of the side edges of the heated and melted film to complete the heat seal. In this embodiment, a bar-shaped center sealer 23b is used, but there are also those that are composed of a pair of rotating rollers, and various structures can be used.

The packaging machine body 12 is equipped with a lower belt conveyor device 26 downstream of the center seal device 23. The lower belt conveyor device 26 forms a transport path for the packaging material 16 that contains the product 13.

Furthermore, the packaging machine main body 12 is equipped with a top sealing device 30 downstream of the lower belt conveyor device 26. The top sealing device 30 seals and cuts the packaging material 16 in a direction perpendicular to the conveying direction, i.e., in the transverse direction. The film portion to be sealed and cut is a predetermined position between the front and rear products 13. This top sealing device 30 is equipped with an upper top sealer 30a and a lower top sealer 30b above and below the packaging material 16, sandwiching it between them. The upper top sealer 30a and the lower top sealer 30b each have a built-in heater, and the sealing surfaces at the tip of each are heated to a predetermined temperature. The upper top sealer 30a and the lower top sealer 30b approach and move away from each other along a predetermined trajectory while maintaining their sealing surfaces facing each other. When approaching each other, the sealing surfaces of the upper top sealer 30a and the lower top sealer 30b sandwich and heat the packaging material 16 from above and below, and the cutter blade built into the upper top sealer 30a enters the cutter groove provided in the lower top sealer 30b and cuts the sealed portion. As a result, the tip portion of the packaging material 16 (the portion containing the leading product 13) is separated from the following packaging material 16, and a package 29 is produced. This package 29 is then transported on the discharge conveyor device 27.

The bag maker 22 used in this embodiment is an adjustable bag maker that can independently change the dimensions when the packaging material 16 is made into a cylindrical bag, that is, the dimensions in the width direction and height direction perpendicular to the conveying direction of the product and packaging material. In FIG. 1, the bag maker 22 is depicted in a simplified schematic form for convenience of illustration. As shown in FIG. 2 to FIG. 4, the specific configuration of the bag maker 22 is, for example, a guide member 31 divided into two parts, left and right, that constitute the conveying path of the product 13, and side wall portions 32 arranged above the guide member 31 and on both the left and right outer sides of the conveying path. L-shaped plates 31a are attached to the opposing edges of the pair of guide members 31 so as to protrude downward. When the packaging material 16 passes through the bag maker 22, the left and right side edges 16a are guided into the gap between the pair of L-shaped plates 31a and overlapped.

On the other hand, the side wall portion 32 is configured to be movable in a horizontal direction perpendicular to the conveying direction by the drive mechanism portion 33. Therefore, the pair of left and right side wall portions 32 can move toward and away from each other, and are positioned opposite each other at an appropriate distance according to the width of the product 13.

Each side wall 32 has a first side wall section 35 that can move left and right in cooperation with the drive mechanism section 33, and a second side wall section 36 that is attached to the first side wall section 35 so as to be movable in an oblique direction along the conveying direction. The first side wall section 35 is an upright, thick, generally flat plate, and its upper edge is formed to be inclined downward along the conveying direction. The second side wall section 36 is an upright, thin, generally flat plate, and its lower section 36a on the front side in the conveying direction is bent inward and positioned on the upper surface of the guide member 31. As a result, the packaging material 16 that has entered the bag making device 22 has both left and right sides folded downward along the second side wall section 36, and is further guided by the lower section 36a and folded inward to be made into a cylindrical bag.

In this embodiment, the connection between the first side wall portion 35 and the second side wall portion 36 is configured as follows. A cylindrical rod receiving member 37 with both ends open is attached to the outer surface of the first side wall portion 35 (the outer surface of the bag making machine 22) on the rear side in the conveying direction, inclined downward along the conveying direction. On the other hand, one end of a rectangular columnar slide rod 38 is attached to the outer surface of the second side wall portion 36, and the slide rod 38 is inserted into the rod receiving member 37. The slide rod 38 is arranged so that it can reciprocate along the axial direction and is fixed at an appropriate position. As a result, the slide rod 38 makes a reciprocating linear motion along the inclination angle of the rod receiving member 37, and the second side wall portion 36 also moves diagonally up and down along the arrangement direction of the slide rod 38, and the relative positional relationship between the first side wall portion 35 and the second side wall portion 36 changes. The first side wall portion 35 is connected to the drive mechanism 33 and its vertical position is fixed, so that the change in the relative positional relationship described above causes the second side wall portion 36 to move forward and backward along the conveying direction while also raising and lowering the height of the rear end portion.

Furthermore, a height adjustment member 40 is fixed at a predetermined position near the rear end of the inner surface of the second side wall portion 36 (the inner surface of the bag maker 22). The height adjustment member 40 is, for example, a rectangular block body. As described above, when the rear end position of the second side wall portion 36 rises and falls, the height position of the height adjustment member 40 also rises and falls. This height adjustment member 40 regulates the height of the packaging material to be made into a cylindrical bag, and the packaging material 16 supplied to the bag maker 22 from diagonally above comes into contact with the height adjustment member 40 at a predetermined position on the center side in the width direction and changes its course while being folded. Specifically, the height adjustment members 40 fixed to the left and right second side wall portions 36 are set to face each other at the same height, and the packaging material 16 that comes into contact with the left and right height adjustment members 40 in this state is folded so that the outer parts of the height adjustment members 40 hang down, and the parts located between the height adjustment members 40 become the upper surface side parts of the final package, and the course is changed to the horizontal downstream side. This type of adjustable bag making machine is disclosed, for example, in Japanese Patent Laid-Open No. 11-301605 and Japanese Utility Model Laid-Open No. 64-32305.

As described above, the bag maker 22 in this embodiment is an adjustable bag maker, and is therefore open at the top. In this embodiment, a suction belt device 50 is disposed at a predetermined position above the bag maker. This suction belt device 50 includes pulleys 52 rotatably attached near the front and rear ends of a pair of plate-shaped frame members 51 on the left and right, an endless belt 53 mounted so as to be stretched across the pulleys 52, a support mechanism 54 that suspends and supports the frame members 51, and a suction means 56 that sucks through a number of through holes 55 provided in the endless belt 53.

In FIG. 1, a pair of pulleys 52 are typically arranged at the front and rear, with the endless belt 53 stretched across them, but it is preferable to arrange three or more pulleys in appropriate positions and rotate the endless belt 53 along a predetermined trajectory. In that case, the belt surface that moves along the conveying direction of the packaging material 16 and product 13 below the endless belt 53 is configured to be positioned on a horizontal plane parallel to the conveying direction. The frame member 51 and therefore the belt surface of the endless belt 53 are configured to be able to be raised and lowered by the support mechanism 54, and the height position of the belt surface is set to be the same as the lower surface of the height adjustment member 40.

The suction means 56 includes, for example, an air intake box disposed within the internal space of the endless belt 53, and piping that connects the internal space of the air intake box to a suction source such as a vacuum pump or a suction pump. The air intake box has a suction port on its underside, and can draw air from the suction port by operating a vacuum pump or the like. The underside of the air intake box is then brought into contact with the inner circumferential surface of the belt as it moves downward as described above.

When configured in this manner, the portion of the packaging material 16 located between the height adjustment members 40 comes into contact with the belt surface of the suction belt device 50 and is adsorbed as it passes through the bag maker 22, and receives a conveying force as the endless belt 53 rotates and moves forward. Since the adsorbed belt surface is installed horizontally, the portion of the adsorbed packaging material 16 located between the pair of height adjustment members 40 is conveyed while maintaining its horizontal position. Therefore, as described above, the packaging material 16 that comes into contact with the height adjustment members 40 and changes its course horizontally does not move downward within the bag maker 22, but is made into a neat cylindrical bag, and passes through the bag maker 22 in that state.

At this time, the upper surface of the cylindrically-formed packaging material 16 receives the conveying force from the suction belt device 50, and the lower surface receives the conveying force from the pinch roller 23a. As a result, the cylindrical packaging material 16 receives conveying forces in the conveying direction from both the top and bottom positions, and is conveyed stably in the cylindrically-formed shape, without causing wrinkles or scratches on the packaging material 16.

Furthermore, the speed at which the belt surface of the suction belt device 50 moves may be equal to the speed at which the packaging material is conveyed by the pinch rollers 23a, but it is preferable to make it slightly faster. In this way, a force is applied to the top side of the suctioned cylindrical packaging material to convey it horizontally, making it possible to more reliably prevent it from moving downward.

Figure 5 shows a second embodiment of the present invention. This embodiment is based on the first embodiment, and auxiliary suction belt devices 60 are placed before and after the top sealing device 30. For example, if the packaging material is strong, such as paper, even if it is neatly shaped into a cylindrical shape by the bag making machine, it may bounce back and expand a little after passing through the bag making machine. However, by suctioning and pressing down again before and after the top sealing device 30, it can be top sealed in the desired cylindrical shape.

In this case, for example, if the top seal device is of the box motion type used in the above-described embodiment, it is preferable to configure the belt end of the auxiliary suction belt device 60 on the top sealer side to move back and forth in the conveying direction in response to the movement of the sealer. Also, in this embodiment, the auxiliary suction belt device 60 is formed as a separate device from the suction belt device 50, so it is preferable to drive each independently. Note that the other configurations and effects are the same as those of the above-described embodiment, so detailed explanations are omitted.

Figure 6 shows a third embodiment of the present invention. This embodiment is based on the first embodiment, and the suction belt device 50 is placed from above the bag maker 22 to a position close to the top seal device 30. In this way, the packaging material 16 made into a cylindrical bag is subjected to a conveying force in a suctioned state while moving inside the packaging machine main body 12, so it can be conveyed and sealed in the desired shape made by the bag maker 22. The other configurations and effects are the same as those of the above-mentioned embodiment, so detailed explanations are omitted.

In addition, in this third embodiment, the suction belt device 50 may include multiple suction means 56. For example, the suction box 56a arranged in the internal space of the endless belt 53 may be divided into multiple parts along the conveying direction, and each suction box 56a may be connected to a different suction source such as a vacuum pump or suction pump. This allows the packaging material 16, which has been reliably bagged into a cylindrical shape, to be reliably suctioned and conveyed.

In each of the above-mentioned embodiments, the endless belt 53 may be driven by an independent servo motor. This allows the conveying force to be adjusted according to the physical properties (thickness, stiffness, etc.) of the packaging material 16.

In each of the above-described embodiments, an example has been shown in which a paper packaging material 16 is used, but the present invention is not limited to this, and may be applied to a thick or strong material other than paper. Also, in each of the embodiments, an example has been shown in which an adjustable bag maker is used, but a non-adjustable type may also be used. In that case, as disclosed in, for example, Patent Document 1, the bag maker has a top surface (in the case of a regular pillow packaging machine), so it is advisable to open a part or all of it and place a suction belt device in the opening area.

In addition, in each of the above-mentioned embodiments and variations, the pinch rollers that pinch the side edges 16a of the packaging material 16 and apply a conveying force are described as components of the center seal device 23, but they may be arranged as independent devices separate from the center seal device 23, or both may be provided.

In addition, in each of the above-mentioned embodiments, a pillow packaging machine of the type that supplies a strip-shaped packaging material to the packaging machine main body from above or below has been described, but the present invention is not limited to this, and may be applied to, for example, a pillow packaging machine of the type that supplies a strip-shaped packaging material to the packaging machine main body from one of the left and right sides of the conveying path. When the packaging material is supplied from the side in this way, both side edges of the packaging material are positioned on the opposite side and overlap one above the other. Therefore, the arrangement directions of the center seal device and top seal device are set accordingly. Then, a suction belt device and, if necessary, an auxiliary suction belt device are also placed in appropriate positions.

Specific illustrations are omitted, but for example, the machine may include a packaging machine main body that packages the products that are sequentially supplied with packaging material, and a packaging material supply device that supplies the packaging machine main body with a strip of the packaging material from one of the left and right sides of the conveying path, the packaging machine main body includes a bag maker that makes a cylindrical bag so that both side edges of the supplied packaging material overlap on the other left and right side of the conveying path, a center seal device that is disposed downstream of the bag maker and overlaps and seals the both side edges of the packaging material, a top seal device that seals and cuts the packaging material in a direction perpendicular to the conveying direction, and a suction belt device that adsorbs the portions of the packaging material opposite the both side edges as it passes through the bag maker.

This type of pillow packaging machine can be realized, for example, by using a packaging machine disclosed in JP 2001-10605 A. In addition, in the packaging machine disclosed in JP 2001-10605 A, the top sealer of the top seal device is arranged to extend vertically and is configured to sandwich the packaging material from the left and right, but it may also be configured to sandwich it from above and below. In addition, in JP 2001-10605 A, the product is an aggregated article in which multiple flat objects are erected and aligned in a direction perpendicular to the conveying direction, but it may also be an aggregated article in which flat objects are laid flat and stacked one on top of the other, or even a single object.

In addition, in each of the above-mentioned embodiments, the lower belt conveyor device 26 and/or the discharge conveyor device 27 may be an adsorption belt.

Although various aspects of the present invention have been described above using embodiments and modifications, it should be noted that these embodiments and descriptions are not intended to limit the scope of the present invention, but are provided to aid in the understanding of the present invention. The scope of the present invention is not limited to the configurations and manufacturing methods explicitly described in the specification, but includes combinations of the various aspects of the present invention disclosed in this specification. Although the configurations of the present invention that are sought to be patented are specified in the appended claims, it is hereby reiterated that configurations disclosed in this specification that are not currently specified in the claims may be claimed in the future.

10: Pillow packaging machine 11: Product conveying and supplying device 12: Packaging machine body 13: Product 14: Packaging material supplying device 16: Packaging material 16a: Side edge portions 22: Bag making machine 23: Center seal device 23a: Pinch roller 29: Packaging body 30: Top seal device 30a: Upper top sealer 30b: Lower top sealer 32: Side wall portion 40: Height adjustment member 50: Suction belt device 53: Endless belt 55: Through hole 56: Suction means 56a: Suction box 60: Auxiliary suction belt device

Claims (6)

A packaging machine body that packages the products that are sequentially supplied with packaging materials;
A packaging material supply device is provided to supply the band-shaped packaging material to the packaging machine body from above or below,
The packaging machine body includes a bag former that forms a cylindrical bag from the supplied packaging material, a center seal device that is disposed downstream of the bag former and overlaps both side edges of the packaging material to seal it, and a top seal device that seals and cuts the packaging material in a direction perpendicular to the conveying direction,
a suction belt device that suctions the area of the packaging material opposite to the side edge portions of the packaging material passing through the bag making machine;
The position of the belt surface of the suction belt device that contacts the packaging material is
A pillow packaging machine that, when forming the packaging material into a tubular bag, makes the position of the area opposite the side edge portions equal to the position of a regulating member. A packaging machine body that packages the products that are sequentially supplied with packaging materials;
A packaging material supply device is provided for supplying the belt-shaped packaging material to the packaging machine body from one of the left and right sides of the conveying path,
The packaging machine body includes a bag former that forms a cylindrical bag from the supplied packaging material such that both side edges of the packaging material overlap on the other side of the left and right sides of the conveying path;
a center seal device that is disposed downstream of the bag former and overlaps and seals both side edges of the packaging material;
A top seal device is provided which seals and cuts the packaging material in a direction perpendicular to the conveying direction,
a suction belt device that suctions the area of the packaging material opposite to the side edge portions of the packaging material passing through the bag making machine;
The position of the belt surface of the suction belt device that contacts the packaging material is
A pillow packaging machine that, when forming the packaging material into a tubular bag, makes the position of the area opposite the side edge portions equal to the position of a regulating member. The pillow packaging machine according to claim 1 or 2, wherein the regulating member and the belt surface are configured to be able to approach and separate from the side of the bag making machine on which the side edges of the packaging material are located. The pillow packaging machine according to any one of claims 1 to 3, wherein the belt movement speed in the suction belt device is faster than the conveying speed of the packaging material in the packaging machine body. The pillow packaging machine according to any one of claims 1 to 4, in which an auxiliary suction belt device that suctions the packaging material is disposed at least in front of or behind the top seal device. A pillow packaging machine according to any one of claims 1 to 5, wherein the front end of the suction belt device in the conveying direction is located in front of the top seal device.

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