JP6719402B2 - Deaerator and packaging machine - Google Patents

Description

The present invention relates to a deaerator and a packaging machine using the same.

In a packaging line that wraps items such as food and daily necessities, stores the items in a bag made of a flexible material such as polyethylene, removes excess air from the bag to degas, and completes degassing. A technique of sealing the bag mouth later is known (for example, refer to Patent Document 1).

The technique described in Patent Document 1 limits a pressing element that holds a soft pressure member to the lower surface to deaerate by a pressing operation and a pressing operation stroke thereof within a predetermined range, that is, the pressing element is below a predetermined height. It is equipped with a stroke adjustment piece that regulates it so that it does not move. Thus, when the presser reaches the final lowered position, the bag is pressed by the soft pressure member and the article is softly pressed, and the bag is deaerated without damaging the article.

Japanese Utility Model Publication No. 1-3450

However, in the case of the deaerator described in Patent Document 1, when the presser moves up and down at a predetermined position in the transport direction of the article and the bag is placed at a predetermined position in the transport direction (on the receiving plate). Since the operation is the intermittent operation in which the pressing element is pressed toward the receiving plate, it is not possible to cope with the speeding up of packaging. In addition, the fact that the driving means of the pressing element is an air cylinder is also a factor that prevents the speeding up of packaging.

That is, high-speed operation in which packaging materials such as films are continuously supplied and tubular bags are formed in accordance with the sequential supply of the articles, and sealing and cutting are performed at predetermined pitches in the width direction of the packaging material. It was difficult to apply the deaeration device described in Patent Document 1 to the packaging machine (bag making and filling machine).

Further, in a bag-making filling machine, nitrogen gas may be continuously filled during packaging in order to prevent deterioration of internal articles. In this case, nitrogen gas is filled until the tubular packaging material expands sufficiently, but on the other hand, when the packaged articles are packed in a box, the size of the entire box is reduced and the accommodation rate in the box is improved. For this reason, there is an increasing demand for degassing nitrogen gas or the like as much as possible before packing in a box and storing it in a standard size box.

Also, in the case of degassing by pressing degassing means from the outside of the packaging material (packing bag), the amount of gas remaining in the packaging material can be reduced by sufficient pressing, but especially for soft articles and delicate products. It is difficult to perform sufficient pressing without damaging the article when packaging an easily fragile article or when the gas is continuously supplied and the transportation speed is high.

Furthermore, when it is necessary to form a gusset (folding portion) with the claw portion at the time of sealing, accurate folding (uniform folding between a plurality of packaging bodies) becomes difficult if the amount of gas remaining in the packaging material is large. There is also a problem that gas flows back into the packaging material due to the formation of the gusset.

The present invention has been made in view of the above problems, even in a packaging machine in which gas is continuously filled in the packaging material (packaging bag) at high speed, without damaging the internal articles, An object of the present invention is to provide a deaeration device and a packaging machine equipped with the deaeration device, which can seal (and form a gusset) in a state where the gas in the packaging material is sufficiently deaerated.

The present invention relates to a deaerator for removing gas inside the packaging material when the packaging material is wrapped in a tubular shape while transporting an article on a transportation surface, and a sealing means for sealing the packaging material in the width direction. Together with at least up and down movement, degassing means for discharging gas in the packaging material by pressing the packaging material, and downward movement of the degassing means while moving in the conveying direction of the article and a regulating means capable regulating the degassing means, the Ru movable der the regulating means integrally with the conveying direction, it is deaerator characterized.
Further, a degassing device that removes gas inside the packaging material when wrapped in a tubular shape with the packaging material while transporting the article on the transport surface, and at least with a sealing means for sealing the packaging material in the width direction. A degassing unit that can move in the vertical direction and discharges gas in the packaging material by pressing the packaging material; and a downward movement of the degassing unit while moving in the conveying direction of the article. Possible restricting means, wherein the restricting means restricts the degassing means from descending from a position corresponding to the height of the article, and the position corresponding to the height of the article is The deaerator is a position where the deaerator does not come into contact with the article.
In addition, while wrapping the article in a tube shape while conveying the article on the conveying surface, a degassing device that removes gas inside the packaging material, and the tube-shaped packaging material is sandwiched from above and below to seal the tube. Sealing means for cutting, upstream conveying means for wrapping and conveying the article supplied from the previous step in the packaging material formed into a tubular bag, and taking over the article conveyed by the upstream conveying means And a downstream side transporting means for transporting the packaging material, wherein the degassing device is movable together with the sealing means at least in the vertical direction, and degasses the packaging material by discharging the gas in the packaging material. Means and regulating means capable of regulating the downward movement of the degassing means while moving in the conveying direction of the article, arranged downstream of the upstream side conveying means, and together with the downstream side conveying means. A packaging machine configured to be movable in a transport direction.

According to the present invention, even in a packaging machine in which the packaging material (packaging bag) is continuously filled with gas at a high speed, the gas in the packaging material is sufficiently removed without damaging the articles inside. It is possible to seal (and form a gusset) in the air.

It is a front view which shows the outline of the packaging machine which concerns on this invention. It is a front view which shows the outline of the packaging machine which concerns on this invention. It is a perspective view which shows the packaging body which concerns on this invention. It is the (A) front view, the (B) front view, the (C) side sectional view, and the (D) side sectional view which show the outline of the horizontal seal device concerning the present invention. It is a front view showing the outline of the horizontal seal device concerning the present invention. It is a front view showing the outline of the deaeration device concerning the present invention. It is the (A) top view, the (B) front view, the (C) front view, and the (D) front view which show the outline of the deaeration device concerning the present invention. It is a front view showing the outline of the deaeration device concerning the present invention. It is a front view showing the outline of the deaeration device concerning the present invention. It is a front view which shows the other example of the degassing apparatus which concerns on this invention.

Hereinafter, a deaerator and a packaging machine according to the present invention will be described in detail with reference to the drawings. First, the configuration of the packaging machine 1 will be described with reference to FIGS. 1 and 2. FIG. 1 is a front view showing an outline of the entire packaging machine 1, and FIG. 2 is a schematic front view showing a main part of this embodiment extracted. In addition, in this figure and each subsequent figure, some configurations are omitted as appropriate to simplify the figure. In addition, in this figure and the following figures, the size, shape, thickness, etc. of the members are exaggerated as appropriate.

In the packaging machine 1 shown in FIG. 1, a packaging material YA1 such as a film is continuously supplied in accordance with the sequential supply of the articles XA1 to form a bag into a tubular shape, and the width of the packaging material YA1 is provided at a predetermined pitch. It is a so-called horizontal bag-making and filling machine in which sealing and cutting are performed in a certain direction, and is a gas-filling and packaging machine in which a gas (for example, nitrogen gas) is continuously filled in the packaging material YA1.

The packaging machine 1 uses the packaging material YA1 (hereinafter, referred to as “packaging film YA1”) such as a resin film that is continuously supplied to convey the articles XA1 sequentially supplied from the previous process from upstream to downstream. While wrapping. In FIG. 1, the left side is upstream and the right side is downstream. The article XA1 is, for example, food or daily necessities, but the packaging machine of the present invention can be used for packaging various other articles XA1.

<Packing machine>

With reference to FIG. 1, the packaging machine 1 includes an article supply device 2, a film supply device 3, a packaging machine body 4, a control unit (not shown), and the like. As a definition of various directions in the packaging machine body 4, the first direction, which is the longitudinal direction of the packaging film YA1 (the direction in which the center seal extends), is the transport direction T, and the width direction of the packaging film YA1 that extends in a strip shape (transverse sealing ( The second direction, which is the direction in which the top seal and the end seal extend), is the conveyance width direction W, and the third direction is the height direction of the packaging film YA (direction perpendicular to the conveyance direction L and the conveyance width direction W). The direction is the transport height direction H.

Each part of these wrapping machines 1 is comprehensively controlled by a control unit. The control unit is composed of a CPU, a RAM, a ROM and the like, and executes various controls. The CPU is a so-called central processing unit, and various programs are executed to realize various functions. The RAM is used as a work area of the CPU. The ROM stores the basic OS and programs executed by the CPU.

The article supply device 2 conveys the articles XA1 at equal intervals and sequentially conveys the articles XA1 to the packaging machine body 4 on the downstream side. The article supply device 2 is composed of, for example, a finger conveyor. Specifically, the article supply device 2 includes a conveyance surface (not shown) having a slit, a side guide (not shown) that guides the article XA1 on the conveyance surface from the side, a sprocket 5 for driving, and a follower. Sprockets (not shown), a ring-shaped chain 6 that runs while being stretched over these sprockets, a plurality of fingers 7 attached to the chain 6 at equal pitches, and a servomotor (not shown) serving as a power source. Omitted) etc.

The drive sprocket is rotated by the drive of the servo motor. The driven sprocket 5 rotates in association with the driving sprocket as the chain 6 travels. The chain 6 travels in a circulating manner by the rotation of the driving sprocket. The plurality of fingers 7 project upward from below the transport surface via the slits. The plurality of fingers 7 travel on the transport surface as the chain 6 travels. As a result, the plurality of fingers 7 pushes the article XA1 on the transport surface and sends it to the packaging machine body 4.

The film supply device 3 continuously supplies the packaging film YA1 to the packaging machine body 4 on the downstream side. The film supply device 3 includes an original shaft 8, a servomotor (not shown), and guide rollers 9a and 9b. The original fabric shaft 8 rotatably holds the original fabric roll YB1. The original fabric shaft 8 is rotated by being powered by a servo motor, and rotates the original fabric roll YB1 held therein. As a result, the packaging film YA1 is fed (stretched) from the original fabric roll YB1. The guide rollers 9a and 9b appropriately change the transport direction of the original roll YB1 and guide it to the packaging machine body 4 side.

As a method of feeding the packaging film YA1 from the original fabric roll YB1, instead of adopting the original fabric driving method as described above, a feed roller is separately provided, and the feed roller is moved to pull out the packaging film YA1. A driving method may be adopted.

The wrapping machine body 4 wraps the article XA1 supplied from the article supply device 2 with the packaging film YA1 supplied from the film supply device 3. Specifically, the packaging machine body 4 includes a bag making device 14, a pinch roller 10, a center sealing device 16, a lateral sealing device 13, a degassing device 15, a first transport device 11, and a second transport device 11. A transport device 12 and the like are provided.

The bag making device 14 forms the packaging film YA1 supplied from the film supply device 3 into a cylindrical bag so that both end edges in the width direction overlap each other. Further, the bag making device 14 supplies the article XA1 supplied from the article supply device 2 to the packaging film YA1 which is formed into a tubular bag. As a result, the article XA1 is wrapped in the tubular packaging film YA1. That is, the bag making device 14 functions as a bag making device that bends the packaging film YA1 in the width direction to form a tubular shape.

The pinch roller 10 sandwiches both end edges (hereinafter, referred to as center seal portion CE1 (see FIG. 3)) of the packaging films YA1 overlapping each other, and applies a conveying force to the center seal portion CE1.

The center seal device 16 includes a pair of bar sealers 16a and a press roller 16b. The center seal device 16 heats by sandwiching the center seal portion with a pair of bar sealers 16a. Then, the center seal device 16 press-bonds the heated center seal portion with the press roller 16b to perform center sealing. That is, the center seal device 16 performs a center seal on the packaging film YA1 formed in a tubular shape, downstream of the bag making device 14.

The first transporting device 11 is an upstream belt conveyor 11 that is a transporting unit disposed on the upstream side, and a center-sealed tubular packaging film YA1 together with an article XA1 wrapped in the packaging film YA1. The sheet is placed on a conveying surface (reference numeral omitted) and conveyed toward the horizontal sealing device 13. The upstream belt conveyor 11 expands and contracts the transport surface in the transport direction L in accordance with the box motion of the horizontal sealing device 13.

The second conveyor 12 is a downstream belt conveyor (shoot conveyor) 12 that is a conveyor that follows the upstream belt conveyor 11, and takes over and conveys the article XA1 conveyed by the upstream belt conveyor 11. The downstream belt conveyor 12 also expands and contracts the transport surface in the transport direction L in accordance with the box motion of the horizontal sealing device 13.

Both belt conveyors 11 and 12 move back and forth following the movement of the horizontal sealing device 13 in the front-rear direction, so that the gap in the front-rear direction with the horizontal sealing device 13 is maintained at a certain distance or less. ..

The horizontal sealing device 13 performs a horizontal seal (also called a top seal or an end seal) and a cut in the width direction of the packaging film YA1 at each pitch according to the length of the article XA1. Thereby, the package ZA1 as shown in FIG. 3 is manufactured. That is, the horizontal sealing device 13 seals and cuts the center-sealed packaging film YA1 in the width direction at predetermined intervals. The package ZA1 is formed with a lateral seal portion (top seal portion, end seal portion) TO1 extending in a strip shape in the width direction. At both ends in the width direction of the lateral seal portion TO1, a film corresponding to the transport height direction H of the packaging film YA1 is folded inward, so that a gusset portion GA1 having a triangular pyramid shape is formed.

The deaerator 15 is a means for removing gas inside the packaging film YA1 when the article XA1 is wrapped in a tubular shape by the packaging film YA1 while being transported on the transport surface.

FIG. 2 is a schematic front view showing the main configuration of the packaging machine body 4 extracted. The upstream belt conveyor 11 is connected to an annular belt 17 running from upstream to downstream, a plurality of pulleys (rollers) 18, 19, 20, 21, 23, 24, 25, and a motor (not shown). The driving pulley 22 and the moving frame 31 and the fixed frame 32 for supporting the respective components are provided, and the article XA1 supplied from the previous step is wrapped in the tubular packaging film YA1 and conveyed. ..

The movable frame 31 is arranged at the downstream end (the front end on the forward side in the traveling direction (on the side of the lateral sealing device 13)) so as to be movable in the front-rear direction of the transport direction L, and the fixed frame 32 extends from below the movable frame 31 to the rear. It is arranged to reach. Pulleys (rollers) 18 to 25 are rotatably supported at appropriate positions of the frames 31 and 32, and a belt 17 is stretched around the pulleys 18 to 25.

The belt 17 has an upstream traveling surface 17a that travels from upstream to downstream, and a return surface 17b that is disposed below the upstream traveling surface 17a and travels from downstream to upstream connected endlessly. There is. The article XA1 supplied from the upstream process is placed on the upstream running surface 17a of the belt 17. That is, the upstream running surface 17a is a transport surface of the upstream belt conveyor 11.

The moving frames 31 are arranged in a pair of left and right at predetermined intervals on both sides of the belt 17 in the width direction (conveyance width direction W), and move forward and backward following the movement of the lateral sealing device 13 in the front-rear direction. The pulley 18 is rotatably supported by the downstream ends of the pair of moving frames 31. A pulley 19 is rotatably supported below the pulley 18. Both ends of the pulleys 18 and 19 are inserted into through holes (bearing portions) (not shown) provided at predetermined positions of the moving frame 31, so that the pulleys 18 and 19 are allowed to rotate, but are easily separated from the moving frame 31. Doing is suppressed. The pulleys 18 and 19 contact the inner surface of the belt 17.

Further, the pulley 20 is rotatably supported below the pulley 19 on the upstream side of the moving frame 31. The pulley 20 contacts the outer surface side of the belt 17, whereby the belt 17 is folded around the pulley 20 and is stretched from the pulley 21 to the pulley 25.

On the other hand, the fixed frame 32 is fixed to, for example, a machine frame (not shown) of the horizontal sealing device 13. The pulleys 21 to 25 are rotatably supported at appropriate positions on the fixed frame 32. Further, the pulleys 21, 22, 24 and 25 contact the inner surface side of the belt 17. Further, the pulley 22 is linked with a drive motor (not shown) and receives a rotational force. This rotational force is transmitted to the belt 17, and the belt 17 rotates.

At a predetermined position upstream of the pulley 22 of the fixed frame 32, a suppressing pulley 23 is attached. The pulley 23 comes into contact with the outer surface side of the belt 17 and applies tension inward. The pulley 23 is configured to be movable with respect to the fixed frame 32. When the pulley 23 moves so as to come into contact with the outer surface of the belt 17, the belt 17 is biased inward, and when the pulley 23 moves so as to separate from the belt 17. , The bias is released.

That is, when the pulley 23 moves so as to come into contact with the outer surface of the belt 17, the belt 17 is largely folded back at the portion of the pulley 22, and a constant tension is applied by the pulley 23, so that the belt 17 becomes taut. Then, the pulley 22 is rotated along with the rotation of the pulley 22 to perform the carrying process.

In the upstream belt conveyor 11, when the moving frame 31 moves in the downstream direction, the upstream traveling surface 17a in the downstream direction extends in the downstream direction, but at this time, the gap between the pulley 19 and the pulley 20 decreases. Then, the extra length of the belt 17 accumulated during this period is paid out. On the other hand, when the moving frame 31 moves in the upstream direction, the upstream traveling surface 17a is shortened, and the extra length of the belt 17 generated thereby is absorbed by the increased distance between the pulley 19 and the pulley 20.

The downstream belt conveyor (chute conveyor) 12 has the same configuration as the upstream belt conveyor 11. That is, the downstream belt conveyor 12 includes an annular belt 40 running from upstream to downstream, a plurality of pulleys (rollers) 41, 42, 43, 44, 46, 47, 48, and a motor (not shown). The connected drive pulley 45, the moving frame 51 and the fixed frame 52 that support the respective components, and the like are provided, and the article XA1 taken over from the upstream belt conveyor 11 is conveyed to the downstream process.

The moving frame 51 is arranged movably in the front-rear direction of the transport direction L at the upstream end (the rear end in the traveling direction (on the side of the lateral sealing device 13)), and the fixed frame 52 is moved from below the moving frame 51 to the front. It is arranged to reach. Pulleys (rollers) 41 to 48 are rotatably supported at appropriate positions of both frames 51 and 52, and a belt 40 is stretched around the pulleys 41 to 48.

The belt 40 has an endlessly connected downstream traveling surface 40a traveling from upstream to downstream and a return surface 40b disposed below the downstream traveling surface 40a and traveling from downstream to upstream. There is. On the belt 40, the article XA1 taken over from the upstream belt conveyor 11 is placed on the downstream traveling surface 40a. That is, the downstream running surface 40a is a transport surface of the downstream belt conveyor 12.

The moving frames 51 are arranged in a left-right pair at predetermined intervals on both sides of the belt 40 in the width direction (conveyance width direction W), and move forward and backward following the movement of the lateral sealing device 13 in the front-back direction. The pulley 41 is rotatably supported at the upstream ends of the pair of moving frames 51. A pulley 42 is rotatably supported below the pulley 41. Both ends of the pulleys 41 and 42 are inserted into through holes (bearing portions) (not shown) provided at predetermined positions of the moving frame 51 to allow rotation, but easily separated from the moving frame 51. Doing is suppressed. Further, the pulleys 41 and 42 contact the inner surface side of the belt 40.

Further, the pulley 43 is rotatably supported below the pulley 42 on the downstream side of the moving frame 51. The pulley 43 comes into contact with the outer surface side of the belt 40, so that the belt 40 is folded around the pulley 43 and is stretched from the pulley 24 to the pulley 48.

On the other hand, the fixed frame 52 is fixed to, for example, a machine frame (not shown) of the horizontal sealing device 13. The pulleys 44 to 48 are rotatably supported at appropriate positions on the fixed frame 52. Further, the pulleys 44, 45, 47, 48 contact the inner surface side of the belt 40. Further, the pulley 45 is linked with a drive motor (not shown) and receives a rotational force. This rotational force is transmitted to the belt 40, and the belt 40 rotates.

A pressing pulley 46 is attached to a predetermined position upstream of the pulley 45 of the fixed frame 52. The pulley 46 comes into contact with the outer surface side of the belt 40 and applies tension inward. The pulley 46 is configured to be movable with respect to the fixed frame 52. When the pulley 46 moves so as to contact the outer surface of the belt 40, the pulley 40 urges the belt 40 inward, and when the pulley 46 moves so as to separate from the belt 40. , The bias is released.

That is, when the pulley 46 moves so as to come into contact with the outer surface of the belt 40, the belt 40 is largely folded back at the portion of the pulley 25, and a constant tension is applied by the pulley 46, so that the belt 40 becomes taut. Then, the pulley 45 rotates in accordance with the rotation of the pulley 45, and the carrying process is performed.

In the downstream belt conveyor 12, when the moving frame 51 moves in the upstream direction, the downstream traveling surface 40a in the upstream direction is extended in the upstream direction, but at this time, the gap between the pulley 42 and the pulley 43 is reduced. Then, the extra length of the belt 40 accumulated during this period is paid out. On the other hand, when the moving frame 51 moves in the downstream direction, the downstream running surface 40a is shortened, and the extra length of the belt 40 generated thereby is absorbed by the increased distance between the pulley 42 and the pulley 43.

In addition, the upstream side conveyor 11 and the downstream side belt conveyor 12 move back and forth following the movement of the horizontal sealing device 13 in the front-back direction, so that the front-back direction of both the belt conveyors 11 and 12 and the horizontal sealing device 13 is increased. The configuration is not limited to the above as long as the configuration keeps the gap at a certain distance or less.

The horizontal sealing device 13 is arranged between the upstream side belt conveyor 11 and the downstream side belt conveyor 12 and forms the tubular packaging film YA1 in the width direction of the upstream traveling surface 17a and the downstream traveling surface 40a (conveyance). It is a means for sealing and cutting in the width direction W) and is also called a top seal device or an end seal device.

The lateral sealing device 13 includes, for example, a first sealer 120 (having a built-in cutter blade) and a second sealer 120 that are arranged along the width direction so as to face the upper and lower sides of the tubular packaging film YA1. A sealer 160, a first holding portion 114 that holds the first sealer 120, a second holding portion (not shown here) that holds the second sealer 160, and the like are provided.

The upper first sealer 120 is moved up and down with its sealing surface kept in a downward posture. The lower second sealer 160 is moved up and down while its sealing surface is kept in the upward posture. The second sealer 160 descends when the first sealer 120 rises, and rises when the first sealer 120 descends. Each of the sealers 120 and 160 sandwiches and seals the packaging film YA1 vertically when the first sealer 120 reaches the lowest position and the second sealer 160 reaches the highest position. In this way, each sealer 120, 160 functions as a sealing unit that vertically sandwiches and seals the packaging film YA1.

The first holding unit 114 holds the upper portion of the first sealer 120. The first holding portion 114 is supported at an eccentric position of a pair of rotating discs (not shown), and the rotation of these rotating discs revolves around the rotation axis of the rotating disc while maintaining its posture. It goes up and down by doing. The second holding portion holds the lower portion of the second sealer 160 and is supported at an eccentric position of a pair of rotating discs (not shown) like the first holding portion 114. By rotating around the rotation axis, it revolves around the rotation axis while maintaining its posture, and ascends and descends.

In this way, the upper and lower sealers 120 and 160 move forward together with the packaging film YA1 by a certain amount while sandwiching the predetermined position of the tubular packaging film YA1 from above and below. As a result, the sandwiched portion of the tubular packaging film YA1 is heat-sealed and cut. This type of lateral sealing device is also called a box motion type.

The moving frame 31 of the upstream belt conveyor 11 and the moving frame 51 of the downstream belt conveyor 12 described above are linked to the second holding unit to which the second sealer 160 is attached, and the transport direction L of the second holding unit. It moves back and forth following the movement in the front-back direction.

In this packaging machine 1, when packaging the article XA1, gas (for example, nitrogen gas) is continuously injected from the upstream side. As a result, at least on the upstream belt conveyor 11, the inside of the tubular packaging film YA1 is filled with nitrogen gas together with the article XA1, and the packaging film YA1 is in a state of maximum expansion.

The deaerator 15 is arranged downstream of the upstream belt conveyor 11 (near the upstream end of the downstream belt conveyor 12). The deaerator 15 of the present embodiment includes a pressing member (deaeration means) 57 that presses the tubular packaging film YA1 containing the article XA1 from above, a support portion 58 that supports the pressing member 57, and an article. It is provided with a first movement restricting portion 55, a second movement restricting portion 56 and the like capable of restricting the vertical movement (conveyance height direction H) of the pressing member 57 while moving in the conveying direction L of XA1. The deaeration device 15 is movable at least in the vertical direction (conveyance height direction H) together with the horizontal sealing device 13, and presses the packaging fill YA1 to discharge the gas in the packaging fill YA1.

The pressing member 57 is, for example, a sponge block, and the pressing surface 57S that presses the packaging film YA1 is provided so as to face the downstream running surface 40a of the downstream belt conveyor 12.

The first movement restricting portion 55 is movable in association with the pressing member 57, and the second movement restricting portion 56 is connected to the moving frame 51 of the downstream belt conveyor 12 in this example. The pressing member 57 can press the packaging film YA1, but the first movement restricting portion 55 and the second movement restricting portion 56 prevent the position of the pressing member 57 (pressing surface 57S) from falling below a predetermined height. Regulated. Further, the first movement restricting portion 55 holds the first sealer 120 of the lateral sealing device 13 and the pressing member 57 in a predetermined positional relationship (these configurations will be described later in detail).

The pressing member 57 (the first movement restricting portion 55 and the second movement restricting portion 56) moves forward and backward in conjunction with the forward and backward movement of the box motion of the lateral sealing device 13. Further, the pressing member 57 interlocks with the first sealer 120 during a part of the movement of the first sealer 120, and descends/rises so as to approach/separate from the downstream traveling surface 40a serving as the transport surface. Then, when the first sealer 120 descends, the pressing member 57 presses the packaging film YA1 to discharge the gas inside the tubular packaging film YA1.

<Horizontal sealing device>

The horizontal sealing device 13 will be described in detail with reference to FIGS. 3 to 5.

The lateral sealing device 13 seals and cuts in the width direction of the packaging film YA1 at each pitch according to the length of the article XA1. Thereby, the package ZA1 as shown in FIG. 3 is manufactured. The package ZA1 is formed with a lateral seal portion (top seal portion, end seal portion) TO1 extending in a strip shape in the width direction.

Further, the horizontal sealing device 13 has a gusset forming mechanism 200, and the gusset forming mechanism 200 folds a film corresponding to the transport height direction H of the packaging film YA1 inward to thereby obtain a width of the horizontal seal portion TO1. A gusset portion GA1 which is a substantially triangular pyramid-shaped recess is formed at both ends in the direction.

FIG. 4 and FIG. 5 are views for explaining the lateral sealing device 13 adopted in the packaging machine 1 described above, and FIG. 4(A) shows the conveyance direction in which the first sealer 120 and the second sealer 160 are in a separated state. It is the front view seen from the downstream side, the figure (B) is a front view of the first sealer 120 and the second sealer 160 approaching, and the figure (C) is the first sealer 120 and the second sealer. 160 is a side sectional view in a separated state, and FIG. 6D is a side sectional view in which the first sealer 120 and the second sealer 160 are close to each other. Further, FIG. 5 is a diagram showing a gusset forming mechanism adopted in the horizontal sealing device 13, and FIG. 5A is a front view of the first sealer 120 and the second sealer 160 when viewed from the downstream side in the conveying direction in the separated state. FIG. 3B is a front view of the first sealer 120 and the second sealer 160 shown in FIG.

As shown in FIGS. 4A and 4C, the horizontal sealing device 13 includes a first sealing unit 110 arranged on the upper side, a second sealing unit 150 arranged on the lower side, and a movement for relatively moving them. A device 180 is provided. The first seal unit 110 and the second seal unit 150 are arranged so as to face each other on both sides of the packaging film YA1, and are moved toward and away from each other by the moving device 180. The first seal unit 110 is provided with a cutter unit 130.

This approaching/separating motion can be moved by, for example, a movement locus of a box motion. Specifically, while the first seal unit 110 and the second seal unit 150 approach each other, sandwich the packaging film YA1, and move a predetermined distance from upstream to downstream so as to follow the transport direction of the packaging film YA1, Seal and cut. After that, the first seal unit 110 and the second seal unit 150 separate from the packaging film YA1, further move a predetermined distance from the downstream side to the upstream side, and return to the original position. By repeating these operations, the packaging film YA1 is repeatedly sealed and cut.

The first seal unit 110 includes a first base 112, a first holder 114 arranged on the packaging film YA1 side of the first base 112, and a first sealer fixed to the first holder 114. Having 120. The 1st holding|maintenance part 114 is arrange|positioned at the 1st base 112 via the slidable slide shaft 114A, and the surface perpendicular direction of the packaging film YA1 with respect to the 1st base 112, ie, the 2nd seal unit. It is reciprocally movable in the direction toward and away from 150. The first holding portion 114 is always biased toward the packaging film YA1 side with respect to the first base 112 by a biasing member 114B such as a compression spring. A heater (not shown) is built in the first sealer 120 to heat the first sealer 120.

The cutter unit 130 installed in the first seal unit 110 includes a cutter 132 that is vertically movable in the first holding unit 114 and the first sealer 120, and a cutter driving device 134 that drives the cutter 132. When the cutter 132 is lowered by the cutter driving device 134, as shown in FIGS. 4B and 4D, the cutter 132 projects from the sealing surface of the first sealer 120, and the cutting edge of the cutter 132 of the second sealer 160. Enter the receiving groove. As a result, the packaging film YA1 is cut.

The second seal unit 150 includes a second base 152, a second holding portion 154 arranged on the packaging film YA1 side with respect to the second base 152, and a second sealer fixed to the second holding portion 154. Having 160. The second holding portion 154 is fixed to the second base 152.

The moving frame 31 of the upstream belt conveyor 11 and the moving frame 51 of the downstream belt conveyor 12 described above are linked to the second holding unit 154. Specifically, although not shown in the drawings, cam plates having guide grooves are provided at the downstream end of the moving frame 31 and the upstream end of the moving frame 51, respectively, and the second base is provided in the guide grooves. A cam follower attached to 152 engages. The shapes of the cam plate and the guide groove are set such that the moving frames 31 and 51 move forward and backward along the transport direction L as the second sealer 160 operates, and move toward and away from each other.

As a result, the moving frames 31 and 51 move back and forth in the transport direction L following the movement of the second holding portion in the front-back direction in the transport direction L.

A rail (not shown) is attached to the second base 152 so as to extend in the vertical direction, and a slider (not shown) that engages with the rail is attached to the first base 112. Then, the sealing surface of the second sealer 160 is kept horizontal.

A heater (not shown) is built in the second sealer 160 to heat the second sealer 160.

As shown in FIGS. 4B and 4D, when the horizontal sealing device 13 seals, the gap between the upstream side belt conveyor 11 and the downstream side belt conveyor 12 becomes large, and the second sealer 160 causes both conveyors to move. The first seal unit 110 and the second seal unit 150 approach each other through the gap between them, and the first sealer 120 and the second sealer 160 contact the packaging film YA1.

When the first seal unit 110 and the second seal unit 150 further approach each other, the first sealer 120 of the first seal unit 110 is pushed toward the first base 112 side against the biasing force of the biasing member 114B. An appropriate clamping force is generated between the one sealer 120 and the second sealer 160. The packaging film YA1 is sealed by the heat of the first sealer 120 and the second sealer 160.

At about the same time as the sealing is completed, the cutter unit 130 lowers the cutter 132 to cut the packaging film YA1.

The lateral sealing device 13 further includes a gusset forming mechanism 200. The gusset forming mechanism 200 has a pair of gusset units 210 arranged on both outer sides of the packaging film YA1 in the transport width direction W, and by the gusset units 210, a pair of gusset units 210 in the transport width direction W of the packaging film YA1. The gusset GA1 (see FIG. 3) is formed on the package ZA1 by folding the side surface inward.

After the sealing, the second sealer 160 passes through the gap between the upstream belt conveyor 11 and the downstream belt conveyor 12 and is below the transport surfaces (the upstream traveling surface 17a and the downstream traveling surface 40a) of both conveyors 11 and 12. After the movement, the gap between the two conveyors 11 and 12 is narrowed to a predetermined distance. The tubular packaging film YA1 filled with the article XA1 is transferred from the transfer device 11 traveling at the same film transfer speed to the transfer device 12 (see FIG. 4 (Ce)).
As shown in FIG. 5, the pair of gusset units 210 are arranged on one side and the other side of the conveyance width direction W, and each has a gusset claw 300 and a moving mechanism (advancing/retreating mechanism) 230 for moving the gusset claw 300 back and forth. .. The pair of gusset units 210 have the same configuration and are arranged symmetrically (opposing) with respect to the center line in the transport direction L.

The moving mechanism 230 includes a guide rail 232 extending in the conveyance width direction W, a slider 234 movably arranged along the guide rail 232, a slide plate 236 fixed to the slider 234 in the vertical direction, and a motor 238. And a swing shaft 239. The swing shaft 239 has one end fixed to the motor 238 and the other end provided with a pin. This pin is inserted into the vertical long hole 236A of the slide plate 236. Accordingly, the moving mechanism 230 is configured with an orthogonal slide mechanism that converts rotational movement into reciprocating movement. When the swing shaft 239 is rotated by the motor 238, the pin moves within the long hole 236A, and the slide plate 236 and The slider 234 reciprocates in the transport width direction W. Although the structure in which the swing shaft 239 is swung is illustrated as the moving mechanism 230 here, an air cylinder or a cam mechanism using, for example, a cylindrical cam may be adopted.

<Deaerator>

The deaerator 15 of the present embodiment will be described in detail with reference to FIGS. 6 and 7. 6(A) and 6(B) are front views showing the outline of the configurations of the pressing member 57 and the first movement restricting portion 55, and FIG. 6(C) is a front view showing the outline of the structure of the second movement restricting portion 56. It is a figure. Further, FIG. 7A is a top view of a state in which the first movement restricting portion 55 and the second movement restricting portion 56 of the degassing device 15 are in contact with each other, and FIG. 7B is the first movement restricting portion. 55 is a front view of the state in which 55 and the second movement restricting portion 56 are separated from each other as seen from the upstream direction. FIG. (C) shows that the first movement restricting portion 55 and the second movement restricting portion 56 are in contact with each other. It is the front view which looked at the state in which it was seen from the upstream, and the same figure (D) is the front view which looked at the state at the time of sealing from the upstream. Note that FIG. 6 is shown as a front view seen from the line XX in FIG.

The deaerator 15 has a pressing member 57, a support portion 58, a first movement restricting portion 55, a second movement restricting portion 56, and the like. Although the first movement restricting portion 55 and the second movement restricting portion 56 are configured separately, both move in the transport direction L of the article XA1 and cooperate with each other to hold the pressing member 57 (deaeration means). ) In the up-down direction (conveyance height direction H) (movement lower than a predetermined height) can be restricted. Then, in the deaerator 15, the pressing member 57, the first movement restricting portion 55, and the second movement restricting portion 56 cooperate with each other to move in the transport direction of the article XA1, while the tubular packaging film YA1 is inside. The gas is discharged to the outside (upstream direction).

As shown in FIGS. 6A, 6B, and 7, the support portion 58 extends from the downstream (right side in FIG. 6) end portion of the pressing member 57 in the direction perpendicular to the pressing surface 57S. And the lower end portion thereof is fixed to the upper surface of the pressing member 57.

The first movement restricting portion 55 has a base portion 551, a shaft portion 552, an elastic portion 553, and an abutting portion 555, and moves in the vertical direction (lowers) so that the pressing member 57 does not lower than a predetermined height. ) Is regulated.

The shaft portion 552 is provided so as to extend in a direction perpendicular to the pressing surface 57S from a position upstream (left side in FIG. 6) of the pressing member 57 support portion 58, and a lower end portion thereof is an upper surface of the pressing member 57. Fixed to. The support portion 58 and the shaft portion 552 are respectively inserted into holes provided in the base portion 551, and the base portion 551 is held by these so as to be vertically movable with respect to the support portion 58 and the shaft portion 552.

A contact portion 555 is provided at the upper end of the shaft portion 552. The abutting portion 555 abuts a part (restricting means) of the second movement restricting portion 56 during deaeration, whereby the downward movement of the pressing member 57 is restricted.

An elastic portion 553 is interposed between the base portion 551 and the pressing member 57 at the lower end portion of the shaft portion 552. The elastic portion 553 is a compression spring (coil spring) wound around the shaft portion 552 in this example. The upstream end of the base 551 is fixed to the first base 112.

The first base 112 moves up and down integrally with the base 551. The base portion 551 is supported so as to be vertically movable with respect to the shaft portion 552 and the supporting portion 58, and the pressing member 57 and the supporting portion 58 are also in a certain period (a period excluding the period in which the lateral sealing device 13 performs sealing). Moves integrally with the base 551 and the first base 112, but when the horizontal sealing device 13 performs the sealing, the base 551 and the first base 112 are relative to the pressing member 57 and the support 58. Move (fall) to.

As shown in FIGS. 6C and 7, the second movement restricting portion 56 has a frame portion 561, a stopper (restricting means) 562 provided at the tip of the frame portion 561, and a connecting portion 563. The frame portion 561 is provided with a substantially U-shaped stopper support portion 562A in a top view (FIG. 7A), and is made of a resin material or the like on the upper ends of the two substantially U-shaped open ends. A stopper 562 is attached. The stopper 562 is configured to abut below the abutting portion 555 of the first movement restricting portion 55 and support the abutment portion 555 from below. The portion 555, the shaft portion 552 fixed to the portion 555, and the pressing member 57 are restricted from moving below the position at which they abut.

The frame portion 561 is connected by the connecting portion 563 so as to be movable in synchronization with the moving frame 51 of the downstream belt conveyor 12, and is movable back and forth in the transport direction L of the belt 40 of the downstream belt conveyor 12. Has become. The moving frame 51 is linked to the second holding unit 154 to which the second sealer 160 is attached, and moves back and forth following the forward and backward movement of the second holding unit 154 and the second holding unit 154 in the transport direction L.

As described above, in the deaerator 15 of the present embodiment, the pressing member 57 can move back and forth in the transport direction L together with the contact portion 555 of the first movement restricting portion 55 and the stopper 562 of the second movement restricting portion 56. Is configured.

Further, as shown in FIG. 6(A), in the first movement restricting portion 55, the base portion 551 is completely synchronized with the movement of the first sealer 120, and moves forward and backward in the transport direction L and in the transport height direction in a box motion. Move up and down H.

On the other hand, as shown in FIG. 3B, the abutment portion 555, the shaft portion 552, the support portion 58, and the pressing member 57 are partially synchronized with the movement of the first sealer 120, and the horizontal sealing device 13 seals. In the period excluding the period of performing, the first sealer 120 moves back and forth in the transport direction L and vertically in the transport height direction H, but when the first sealer 120 seals, it does not synchronize with the lowering operation of the first sealer 120. , Stop in place.

The elastic portion 553 is compressed, so that the first sealer 120 moves downward when the contact portion 555, the shaft portion 552, the support portion 58, and the pressing member 57 are stopped at predetermined positions (after the stop). Allow to do. That is, the sealing surface of the first sealer 120 is configured to be movable below the pressing surface 57S of the pressing member 57.

Further, the mounting portion 564 for mounting the frame portion 561 to the moving frame 51 has, for example, a mounting groove (not shown) that is long in the height of the frame portion 561 (conveying height direction H) and an arbitrary position of the mounting groove. The height of the frame portion 561 (position in the vertical direction), that is, the height of the stopper 562 (position in the vertical direction) is adjustable by a fixing means 563A (for example, a screw) for fixing the frame portion 561. It is configured.

<Deaeration operation>

The deaeration operation in the deaerator 15 of the present embodiment will be described with reference to FIGS. 8 and 9. FIG. 8 and FIG. 9 are schematic views showing the main parts of the degassing device 15 and the lateral sealing device 13 that perform the degassing operation.

As shown in FIG. 8(A), when the article XA1 is transferred onto the downstream belt conveyor 12, the lateral sealing device 13 causes the first sealer 120 to seal and cut the upstream end thereof. The second sealer 160 and the second sealer 160 move in a box motion so that they approach each other.

The deaeration device 15 moves in conjunction with the horizontal sealing device 13 at the timing before the horizontal sealing device 13 seals. Specifically, the pressing member 57 and the first movement restricting portion 55 move in the forward and downward directions of the transport direction L in synchronization with the first sealer 120, and the second movement restricting portion 56 causes the second sealer 160 to move. It moves in the forward direction of the transport direction L in synchronization with the moving frame 51 of the downstream side belt conveyor 12 which is interlocked with.

Then, as shown in FIG. 7B, when the first sealer 120 starts to descend at a predetermined seal position, the pressing member 57 and the first movement restricting portion 55 descend in conjunction with this. The packaging film YA1 is filled with gas (for example, nitrogen gas), and the packaging film YA1 has expanded to a position sufficiently higher than the height of the article XA1.

As shown in FIG. 6C, the pressing member 57 descends together with the first sealer 120, comes into contact with the upper side of the packaging film YA1, and starts pressing. At this time, the gas continuously flows in from the upstream side, and the pressing member 57 presses the packaging film YA1 with a sufficient force that allows the gas in the packaging film YA1 to be discharged while blocking the inflow of gas. At this timing, the sealing surface 120S of the first sealer 120 is located above the pressing surface 57S of the pressing portion 52.

At the timing shown in FIGS. 7B and 7C before the pressing by the pressing member 57 is started, the contact portion 555 and the stopper 562 are not in contact with each other, and the pressing member 57 is synchronized with the first sealer 120. It is possible to descend.

As shown in FIG. 9A, when the pressing member 57 presses the gas in the packaging film YA1 and the pressing member 57 and the first movement restricting portion 55 descend to a predetermined height, the first movement restricting portion 55. The lower surface of the contact portion 555 contacts the upper surface of the second movement restricting portion 56, the downward movement of the pressing member 57 and the first movement restricting portion 55 is restricted, and the lowering operation of the pressing member 57 is stopped.

The predetermined height (height from the downstream running surface 40a) H1, that is, the position where the pressing member 57 is restricted from descending and stopped, is, for example, the height of the article XA1 (the height in the conveyance height H direction). Is slightly higher than or slightly higher than. For this height H1, the height of the upper surface of the stopper 562 of the second movement restricting portion 56 is preset by adjusting the mounting portion 564 of the frame portion 561 (the pressing surface 57S of the pressing member 57 has the height H1. It is realized by setting the position where it can be stopped).

In other words, the pressing member 57 presses the packaging film YA1 with a sufficient force that allows the gas in the packaging film YA1 to be discharged while blocking the inflow of gas into the packaging film YA1. The contact portion 555) and (the stopper 562 of) the second movement restricting portion 56 restrict the downward movement of the article XA1 in a non-contact state and stop the article XA1.

The first sealer 120 continues to descend during this period (the period when the pressing member 57 is stopped). For example, at the timing when the pressing member 57 is stopped shown in FIG. The height H2 of the sealing surface 120S of 120 from the height from the downstream running surface 40a is higher than the height H1 of the pressing surface 57S of the pressing member 57.

Then, as shown in FIGS. 4 and 5, in a state in which the pressing portion 52 is stopped at a predetermined position and the gas in the packaging film YA1 is sufficiently discharged (timing after degassing shown in FIG. 9A). The gusset claw 300 of the gusset forming mechanism 200 advances in the transport width direction W and folds the upstream side surface of the packaging film YA1 toward the inner side (center in the transport width direction W) to form the gusset GA1 (see FIG. 3). To do.

Thereafter, as shown in FIG. 7B, the first sealer 120 continues to descend even after the pressing member 57 has stopped. The first sealer 120 is connected to the base portion 551 of the first movement restricting portion 55 via the first holding portion 114 and the first base 112, but the base portion 551 is vertically movable with respect to the shaft portion 552. It is supported, and the downward pressing force is absorbed by the compression of the elastic portion 553, and the first sealer 120 is allowed to descend. That is, even after the contact portion 555 contacts the stopper 562 of the second movement restricting portion 56 and the lowering of the pressing member 57 is stopped, the first position of the pressing member 57 in the height direction is not moved. The sealer 120 can be lowered.

Then, at this timing, the height H2 from the height of the sealing surface 120S of the first sealer 120 is lower than the height H1 of the pressing surface 57S of the pressing member 57.

As described above, in the present embodiment, during deaeration by the deaerator 15 (pressing member 57), the sealing surface 120S of the first sealer 120 is located above the pressing surface 57S of the pressing member 57, and the first sealer At the time of sealing with 120 and the second sealer 160, the sealing surface 120S is located below the pressing surface 57S of the pressing member 57.

Then, the sealing surface 120S of the first sealer 120 contacts the sealing surface of the second sealer 160, and contacts through the packaging film YA1 to perform sealing and cutting.

After that, the horizontal sealing device 13 performs a box motion, the first sealer 120 and the second sealer 160 are separated from each other, and in synchronization with this, the pressing member 57 and the first movement restricting portion 55 move upward. In addition, the downstream end of the upstream belt conveyor 11 moves to the upstream side, the first movement restricting unit 55 moves in the upstream direction in synchronization with the movement of the upstream belt conveyor 11, and the downstream belt conveyor 12 moves. The second movement restricting portion 56 moves in the upstream direction in synchronization with. Then, the package ZA1 in which the seal portion (top seal portion TO1) is formed is conveyed downstream.

As described above, according to the present embodiment, in the deaerator 15, the pressing member 57 presses the packaging film YA1 from above before the lateral sealing device 13 seals and cuts the packaging material YA1. Degas. At this time, the pressing member 57 has a height that does not damage the article XA1 while sufficiently discharging the gas (for example, nitrogen gas) in the packaging film YA1 by the first movement restricting portion 55 and the second movement restricting portion 56. (For example, the height of the article XA1 is the same as or slightly higher than the height of the article XA1), and the downward movement is restricted.

In the case of a gas filling packaging machine in which gas is continuously supplied into the packaging film YA1, it is necessary to press with a large force to discharge the gas, but this large pressing force is applied to the article XA1 in the packaging film YA1. In this case, the article XA1 may be damaged. On the other hand, especially when the article XA1 is soft, there is a problem that deaeration in the packaging film YA1 is insufficient with a pressing force that does not damage the article XA1.

According to the present embodiment, since the pressing portion 52 is restricted from descending at a predetermined height and stopped, the packaging film YA1 is pressed with a pressing force large enough to discharge gas, but the product XA1 to be a product is damaged. There is no fear and sufficient deaeration can be performed.

Further, prior to the sealing of the lateral sealing device 13, and before the gusset GA1 is formed when the lateral sealing device 13 is sealed, the pressing portion 52 moves down to a position corresponding to the height of the article XA1 and moves. Is regulated. Even after the pressing member 57 is stopped, the first sealer 120 is allowed to move below the pressing member 57, and the sealing surface 120S of the first sealer 120 can be moved below the pressing surface 57S of the pressing member 57. it can.

Therefore, the gusset molding mechanism 200 of the lateral sealing device 13 can form the gusset GA1 with the pressing member 57 pressing the packaging film YA1 from above and degassing, and then sealing and cutting can be performed. That is, even in the packaging machine 1 in which gas is continuously filled, inflow of gas (backflow of discharged gas) into the packaging film YA1 is avoided, and the packaging is accurate and uniform between the packaging bodies ZA1. It is possible to form the seal portion (for example, the top seal portion TO1) and the gusset GA1.

Further, the deaerator 15 can move at least in the transport direction L integrally with the first movement restricting portion 55 and the second movement restricting portion 56. More specifically, the deaeration device 15 (the pressing member 57, the first movement restricting portion 55, and the second movement restricting portion 56) moves in conjunction with the lateral sealing device 13 and the downstream belt conveyor 12 that is interlocked therewith. (Move by box motion). That is, there is no need for a separate control or device for adjusting the timing to the box motion of the horizontal sealing device 13, degassing the packaging film YA1 efficiently and sufficiently, and forming an accurate and uniform gusset GA1 and sealing portion. Is possible.

Further, since the pressing member 57 moves in synchronization with the first sealer 120, a dedicated drive means (for example, an air cylinder) for moving the pressing member 57 is unnecessary, and the operation speed of the pressing member 57 can be increased. .. Therefore, even a packaging machine that operates at high speed can perform sufficient deaeration.

The packaging body ZA1 of the present embodiment formed in this way has a gas inside which is sufficiently degassed, so that even if the packaging body ZA1 is packaged by a gas filling type packaging machine, , And can be reduced to almost the same size as the article XA1.

Therefore, even when the package ZA1 is packed in a box, it is possible to use a box of an efficient standard that matches the outer size of the article XA1, and it is possible to reduce the size of the box. Alternatively, when packing a plurality of packages ZA1 in a box, the accommodation rate can be improved.

Further, the second movement restricting portion 56 can adjust the height of the upper surface of the stopper 562 to an arbitrary position by adjusting the attachment portion 564 of the frame portion 561, so that the height of the article XA1 and the inside of the packaging film YA1 can be adjusted. Even when the amount of gas to be charged into the space changes, the pressing member 57 can be easily stopped at an appropriate position according to each height.

In addition, although the said embodiment demonstrated the case where substantially all amount of gas in the packaging film YA1 was discharged, the amount of gas in the packaging film YA1 may remain a predetermined amount. Even in that case, since the height (stop position) for restricting the movement of the pressing member 57 can be appropriately selected according to the amount of gas left in the packaging film YA1, a desired amount of gas is discharged (the packaging film. Can remain in YA1).

<Modification>

A modified example of the present embodiment will be described with reference to FIG. 10. The figure is a front view showing another example of the deaerator 15. In the above embodiment, the configuration in which the second movement restricting unit 56 is moved in synchronization with the downstream belt conveyor 12 has been described. However, the second movement restricting unit 56 cannot move along the transport direction L, for example. It may be attached to the machine body F or the like of the packaging machine body 4 so as to become.

In this case, the stopper 562 of the second movement restricting portion 56 is assumed to have a predetermined length along the conveyance direction L (a length larger than the movement amount of the downstream belt conveyor 12 in the conveyance direction L), and the first movement The contact portion 555 of the restricting portion 55 is different from the above-described embodiment in that the contact portion 555 has a roller shape, and the other configurations are the same.

In this configuration, after the contact portion 555 contacts the stopper 562 and the lowering of the pressing member 57 is stopped, the first movement restricting portion 55 moves in the downstream direction by the roller-shaped contact portion 555, The sealer 120 can be lowered and sealed and cut.

Also in this case, the height of the upper surface of the stopper 562 can be adjusted to an arbitrary position by adjusting the mounting portion 564 of the frame portion 561.

As described above, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit and technical idea of the present invention.

For example, in the above embodiment, the case where the packaging machine 1 is a horizontal bag-making filling machine has been described as an example, but it may be a vertical bag-making filling machine.

Further, the packaging machine 1 is not limited to the gas filling packaging machine in which the gas is continuously filled, and even a general packaging machine (a packaging machine in which the gas is not positively filled) does not need the unnecessary packaging film YA1. The same can be done when deaerating the air.

Further, the packaging machine 1 may be a three-side sealing machine, a four-side sealing machine or a shrink packaging machine.

The upstream belt conveyor 11 may be configured such that the belt 17 does not expand and contract in the transport direction.

Further, the center seal by the center seal device 16 may be an envelope sticking which seals the film front surface and the film back surface in contact with each other. Further, the center seal device 16 may heat by sandwiching the center seal part using a heating roller instead of the pair of bar sealers.

Further, the deaerator 15 may be provided with an air bleeding unit that presses the side portion of the tubular packaging film YA1. As a result, a gusset can be formed neatly at a predetermined position regardless of the shape and hardness of the object to be packaged (article XA1).

DESCRIPTION OF SYMBOLS 1 wrapping machine 2 article supply apparatus 3 film supply apparatus 4 wrapping machine main body 5 sprocket 6 chain 7 fingers 8 original shafts 9a, 9b guide roller 10 pinch roller 11 upstream belt conveyor 12 downstream belt conveyor 13 horizontal sealing device 14 bag making Device 15 Deaeration device 16 Center seal device 17 Belt 31 Moving frame 32 Fixed frame 40 Belt 51 Moving frame 52 Fixed frame 55 First movement restricting portion 56 Second movement restricting portion 57 Holding member 57S Holding surface 58 Supporting portion 110 First seal Unit 114 First holding part 120 First sealer 120S Sealing surface 154 Second holding part 160 Second sealer 200 Gazette molding mechanism 551 Base part 552 Shaft part 553 Elastic part 555 Contact part 561 Frame part 562 Stopper XA1 Article YA1 Packaging film ZA1 Packaging body

Claims (8)

A degassing device for releasing gas inside the packaging material when wrapped in a tubular shape by the packaging material while transporting the article on the transport surface,
Degassing means that is movable at least in the up-and-down direction together with a sealing unit that seals the packaging material in the width direction, and that discharges gas in the packaging material by pressing the packaging material
Regulating means capable of regulating downward movement of the deaerating means while moving in the transport direction of the article ,
The degassing means, Ru movable der to said regulating means integrally with the conveying direction,
A degassing device characterized in that A degassing device for releasing gas inside the packaging material when wrapped in a tubular shape by the packaging material while transporting the article on the transport surface,
Degassing means that is movable at least in the up-and-down direction together with a sealing unit that seals the packaging material in the width direction, and that discharges gas in the packaging material by pressing the packaging material
Regulating means capable of regulating downward movement of the deaerating means while moving in the transport direction of the article,
The restriction means restricts the deaeration means from descending from a position corresponding to the height of the article,
The position according to the height of the article is a position where the degassing means does not contact the article,
A degassing device characterized in that The deaeration means descends to a position corresponding to the height of the article prior to the sealing by the sealing means ,
The degassing device according to claim 2, wherein While supporting the regulating means at a predetermined height, it has a supporting means capable of adjusting the predetermined height,
Degassing apparatus according to any one of claims 1 to 3, characterized in that. The movement of the degassing means is regulated by the regulating means before a gusset is formed at the time of sealing by the sealing means ,
Degassing device according to any one of claims 1 to 4, characterized in that. When wrapped in a tubular shape by the packaging material while transporting the article on the transport surface, a degassing device for removing gas inside the packaging material,
Sealing means for sandwiching the tubular packaging material from above and below and sealing and cutting the packaging material,
The article supplied from the previous step, the upstream side conveying means for wrapping and conveying the packaging material formed into a tubular bag,
A downstream-side transporting means for carrying over and transporting the article transported by the upstream-side transporting means,
The deaerator is
Degassing means that is movable at least in the vertical direction together with the sealing means, and that discharges the gas in the packaging material by pressing the packaging material ,
Regulating means capable of regulating downward movement of the deaerating means while moving in the transport direction of the article ,
It is arranged downstream of the upstream side transport means and is configured to be movable in the transport direction together with the downstream side transport means ,
A packaging machine characterized by the above. Has a pawl portion which forms a gusset when sealing by the sealing means,
The claw portion forms the gusset after the movement of the deaeration means is regulated by the regulation means ,
The packaging machine according to claim 6, wherein: The inside of the packaging material is continuously filled with gas,
The packaging machine according to claim 6 or 7, characterized in that.