JP5538926B2 - Air release device for horizontal pillow packaging machine - Google Patents

Description

  The present invention relates to an air venting device for a horizontal pillow packaging machine, which is disposed in the vicinity of a downstream side of an end seal device, and remains in the package by pushing back the internal air present at the tip side in the tubular film to the rear side. The present invention relates to an air bleeding device that reduces the amount of air.

  As is well known, a horizontal pillow wrapping machine forms a tubular film by forming a belt-like film into a cylinder through a bag making machine and sealing the overlapped film polymerization ends with a center sealer. On the other hand, on the upstream side of the bag making machine, a product transporting and supplying device for supplying an article to be packaged into the bag making machine at predetermined intervals is arranged. The articles to be packaged are conveyed in a state where they are arranged at equal intervals in the cylindrical film. And by the end seal device arranged on the carry-out side of the horizontal pillow packaging machine, the package body containing the article to be packaged is sealed and cut so as to cross the cylindrical film in the horizontal direction at predetermined intervals. Manufactured.

  In the horizontal pillow wrapping machine, the tubular film and the packaged object do not adhere to each other during the manufacturing process, so that a space is generated between the packaged object and the tubular film. Therefore, if the end seal device is used for sealing and cutting as it is, the air present around the packaged object remains in the package as it is and is inflated. Then, there arises a problem that it becomes difficult to smoothly put the package in a packaging box made of corrugated cardboard or the like for transportation, or difficult to put in display at a store.

  In order to solve such a problem, there is a case where air is discharged to discharge the air in the packaging bag before sealing with the end seal device. As shown in FIG. 1, this type of air bleeding device includes a sponge 3 that is installed on the downstream side of the box motion type end seal device 1 and is linked to the upper top sealer 2 a that constitutes the end seal device 1. ing. The sponge 4 moves along a predetermined locus in synchronization with and interlocked with the operation of the top sealer 2a. Specifically, as shown in FIG. 1 (a), the sponge 3 is located above the upper and lower top sealers 2a and 2b in a state where the upper and lower top sealers 2a and 2b are separated from each other. Get away. As the top sealer 2a rotates, the sponge 3 gradually moves downward. And as shown in FIG.1 (c), in the state which the upper and lower top sealers 2a and 2b pinch | interpose and seal the cylindrical film 5 from the upper and lower sides, the sponge 3 hold | suppresses the cylindrical film 5 from upper direction. When the sponge 3 presses the tubular film 5 downward, the air inside the tubular film 5 is pushed backward to release air.

  This type of air venting device is disclosed in, for example, Patent Document 1 and the like. Since the technique disclosed in Patent Document 1 is a rotary end seal device, the sponge also moves up and down in synchronization with the rotation of the upper top sealer, but the top sealer does not interfere with the rotating top sealer. In contrast, the sponge can move in the front-rear direction. As described above, although the connection mechanism between the sponge and the top sealer is different from that shown in FIG. 1, the technical idea that air is released by holding the sponge from above is the same.

JP 2004-142810 A

  By the way, in order to perform the above air bleeding more effectively, the pressing force of the sponge 3 against the tubular film 5 may be increased, but in such a case, the sponge 3 is compressed and the elasticity is lowered. Therefore, a strong pressing force acts on the tubular film 5 that encloses the article 4 to be packaged, thereby inhibiting the upstream film flow. For this reason, as shown in FIG. 1B, end sealing is performed in a state in which the tubular film is slackened, and wrinkles may occur in the top sealer of the packaging bag, resulting in poor sealing. In particular, as shown in the drawing, when there is a difference in height, such as the surface of the package 4 being inclined, the pressing force concentrates on a high portion, and thus the above phenomenon is likely to occur. Further, when the packaged item is a relatively soft and elastic article such as “Nan” of food, there is also a problem that the packaged product is crushed when pressed too strongly.

  On the other hand, in order to prevent generation of wrinkles in the top seal portion, it is only necessary to weaken the pressing force of the sponge 3 so as not to hinder the flow of the upstream film, but on the other hand, air bleeding is insufficient.

  Further, as shown in the figure, when the shape of the article to be packaged 4 has a difference in height such as the surface being inclined, when the bottom surface of the sponge 3 comes into contact with a high part of the article to be packaged 4, it moves further downward. This is not possible, and a space K is generated between the lower portion of the article 4 to be packaged and the bottom surface of the sponge 3. Therefore, there is also a problem that the air in the space K cannot be effectively removed.

In order to solve the above-described problems, an air bleeding device for a horizontal pillow packaging machine according to the present invention is (1) disposed on the carry-out side of a horizontal pillow packaging machine provided with an end seal device, and the end seal device performs a seal cut. An air bleeder for a horizontal pillow wrapping machine that pushes out the air on the leading end side of the tubular film before being pushed, a restraining member capable of restraining the tubular film containing the packaged object from above, and A movement mechanism for moving the restraining member up and down, the restraining member having a sealed bag body and an attachment member for attaching the sealed bag body, and providing a cushioning material between the attachment member and the bag body; The filling amount of the gas in the bag body is such that the gas can freely move inside the bag body, and the lower surface of the bag body follows the shape of the packaged object through the cylindrical film. I was able to. For example, the moving mechanism may be connected to an end seal device (top sealer) and moved integrally with the end seal device, or may be linked while enabling relative movement with respect to the top sealer. May be arranged separately, and the restraining member may be moved up and down by an appropriate drive system. In any case, before the sealing process is completed with the pair of top sealers sandwiching the tubular film from above and below, the holding member comes into contact with the tubular film, and the air in the tubular film is sent backward. It is necessary to operate the restraining member.

  In this case, since the gas in the bag is not 100% full, for example, when the surface of the bag is pushed inward, the gas around the pushed portion The body moves to a region away from the pressed portion, and the pressed portion is pushed into the inside to be deformed. Therefore, when the bag body comes into contact with the tubular film from above, the lower surface in the bag body is deformed along the surface of the packaged object. Then, the tubular film is pressed along the surface of the article to be packaged by the pressure of the gas in the bag body, whereby the air in the tubular film is pushed backward and air can be released.

And in the present invention, since the cushioning material digits set between the mounting member and the bag body, even with a high height of the articles to be packaged, since the upper end of the material to be packaged hits the cushioning material, the package item is damaged or the like Can be prevented.

  (3) It is good to provide the adjustment means which adjusts the said filling amount. In this way, for example, in the case of a packaged item having a large dimension shape or a height (difference in height), the filling amount is reduced, and in the case of a packaged item having a small dimension shape or low, the filling amount. By increasing the value, appropriate air bleeding can be performed. Further, when the end seal device is operated at an increased rotational speed, fine adjustment such as slightly reducing the filling amount is possible.

  (4) It is preferable to provide only one bag body on the attachment member. As shown in the embodiment, by providing one large bag body, the range of movement of the gas in the space is widened, and the object to be packaged can be entirely wrapped, so that the gas can be vented effectively. Of course, in this invention, it does not prevent taking the structure which provides a some small bag body.

  (5) The lower surface of the bag body may have a shape corresponding to the outer shape of the packaged object. In this way, the movement of the gas in the bag can be reduced, and the air can be vented smoothly and quickly. For example, in the case where the shape of the article to be packaged is different in each product, although the approximate shape is similar, fine adjustment according to the shape of the product can be handled by deforming the bag body.

  (6) It is preferable that at least a surface of the bag body is made of a material having a small frictional resistance with the cylindrical film. If it does in this way, it will not hinder the flow of a packaging film more.

  In the present invention, effective air venting can be performed without hindering the flow of the cylindrical film containing the packaged article, so that the sealing property is high and the convenience of transportation and display is excellent. Packaging becomes possible.

It is a figure which shows a prior art example. It is a figure which shows one suitable embodiment of this invention. It is a figure which shows the principal part of one Embodiment of the air bleeder for horizontal pillow packaging machines. It is a figure which shows the modification of the air bleeding apparatus for horizontal pillow packaging machines. It is a figure which shows another embodiment of the air bleeding apparatus for horizontal pillow packaging machines. It is a figure which shows another embodiment of the air bleeding apparatus for horizontal pillow packaging machines.

  FIG. 2 shows an embodiment of a horizontal pillow packaging machine to which the present invention is applied. The horizontal pillow wrapping machine 10 is provided with a packaged article transport and supply device 11, a wrapping machine main body 12, and a carry-out conveyor device 13 in order from the upstream side.

  The packaged article conveyance and supply device 11 conveys the article to be packaged 14 at regular intervals and sequentially supplies it to the packaging machine body 12 at the next stage, and is formed from a finger conveyor device. That is, the push finger 17 is attached to the endless chain 16 spanned between the front and rear sprockets 15 (only the front is drawn in the drawing). Then, by supplying the article to be packaged 14 between the front and rear push fingers 17, the article to be packaged 14 is conveyed at the finger pitch of the push fingers 17.

  For example, like the “Nan” of food, the surface of the package 14 is not a horizontal surface but an inclined surface, and the height of each package 14 varies depending on the region. In the figure, the shape is such that the thickness decreases as it goes forward in the direction of travel.

  The packaging machine body 12 is configured to guide the belt-like film 21 continuously drawn from the raw roll 20 to the bag making machine 24 while passing over various rollers 22 (only one is drawn in the drawing). Then, the belt-like film 21 is passed through the bag making device 24 to form a bag. In addition, the unloading end of the above-described packaged article transport and supply device 11 is located in the bag making device 24, whereby the packaged article 14 unloaded from the packaged article transport and supply device 11 at predetermined intervals is It is supplied at predetermined intervals into a bag making machine 24 and then into a tubular film 25 which is formed into a tubular shape.

  On the downstream side of the bag making device 24, a pinch roller 29 that sandwiches a portion where both side edges of the belt-like film 21 formed in a cylindrical shape in the bag making device 24 are overlapped to give a conveying force, and the overlapped portion A center seal device 27 that seals the belt and a lower belt 26 that constitutes a conveyance path for the tubular film 25 that encloses the article to be packaged 14 are provided in that order. Further, an upper restraining belt 28 is disposed at a predetermined position above the lower belt 26, and an end seal device 30 is disposed in front of the traveling direction thereof. The upper restraining belt 28 is disposed on the front side of the end seal device 30 and restrains the article 14 from floating upward. Thereby, the predetermined position (portion in which the package object 14 does not exist) of the cylindrical film 25 is correctly sealed and cut by the end seal device 30, and the biting of the package object 14 is prevented from occurring.

  The end seal device 30 includes a pair of top sealers 31 and 32 arranged to face each other in the vertical direction. The upper top sealer 31 has a lower surface as a seal surface 31a, and the lower top sealer 32 has an upper surface as a seal surface 32a. Further, a cutter blade is incorporated below the upper top sealer 31. The top sealers 31 and 32 move in a substantially rectangular locus by moving toward and away from each other and moving back and forth while maintaining the state where the seal surfaces 31a and 32a face each other. Then, the top sealers 31 and 32 move closer to each other, and the sealing surfaces 31a and 32a are sandwiched from above and below the desired portion of the tubular film 25 (between the front and back packages 14) and heat sealed, and with a cutter blade The tubular film 25 is cut in the lateral direction. Thereby, the front-end | tip part (part which includes the to-be-packaged object 14 of the head) of the cylindrical film 25 is isolate | separated, and the package 34 is manufactured. Then, the package 34 is conveyed on the carry-out conveyor device 13.

  Since the basic configuration of these horizontal pillow packaging machines is the same as the conventional one, detailed description thereof is omitted. Of course, the horizontal pillow packaging machine to which the present invention is applied can use various other configurations. The end seal device is not limited to the box motion type, and can be applied to various types such as a type that moves up and down (does not move back and forth) on the spot and a rotary type.

  Here, the air venting device 40 for a horizontal pillow packaging machine according to the present invention is disposed in the vicinity of the downstream side of the end seal device 30. As shown in an enlarged view in FIG. 3, a holding member 41 that holds down the tubular film 25 (packaging body 34) that encloses the article 14 from above is provided. The holding member 41 is linked to the upper top sealer 31 side by a linkage mechanism (not shown), and moves up and down in synchronization with the movement of the top sealer 31. This cooperation mechanism can be comprised by the connection plate connected directly or indirectly to the mounting base of the top sealer 31, for example. As a result, the top sealer 31 and the restraining member 41 are integrated. When the top sealer 31 moves downward, the restraining member 41 also moves downward. When the top sealer 31 moves upward, the restraining member 41 also moves upward. Further, since the end seal device 30 is a box motion type, the top sealer 31 also moves forward and backward, but the restraining member 41 also moves forward and backward in synchronization with it. The holding member 41 includes a base plate 42 and a sealed bag body 43 attached to the lower surface of the base plate 42.

  The bag body 43 is filled with a predetermined amount of air or other gas (here, air). The filling amount is not 100%, and the air can be freely moved in the bag body 43. As a result, when the surface of the bag 43 is pushed inward, the air around the pushed portion moves to a region away from the pushed portion in the bag 43 and is pushed. The deformed part is pushed into the inside and deformed into a depressed state. The deformable deformation amount is determined by the amount of the filling amount, and the smaller the filling amount, the larger the deformable amount. And since the filling amount of the air to the bag body 43 is suitably reduced, as shown in FIG. 3A, the holding member 41 is at the upper position, or the bag body 43 is the tubular film 25 (packaged object). In the case of no contact with 14), the surface of the bag body 43 is in a loose state.

  When the holding member 41 is also moved downward as the upper top sealer 31 is moved downward, the lower surface of the bag body 43 comes into contact with the tubular film 25 directly below, and further moved downward as it is, the height of the package 14 is increased. At the high portion (in the drawing, the rear end side in the traveling direction), the bag body 43 is relatively pushed upward at the portion of the article 14 to be packaged. Therefore, the air that was present in the rear side region in the traveling direction of the bag body 43 moves to the front side, and accordingly, the bag body 43 can be deformed along the outer shape of the package 14 (FIG. 3). (See (b)). Therefore, the tubular film 25 is also sandwiched between the bag body 43 and the packaged object 14, deformed along the outer surface of the packaged object 14, and the air in the tubular film 25 is sent out rearward to release air. Is done.

  In addition, when there is too much filling amount of the air in the bag body 43, the amount which can deform | transform is small and it cannot fully bleed. On the other hand, when the filling amount is too small, there is no force to hold down firmly, and the tubular film 25 cannot be held down firmly. Therefore, an appropriate filling amount is set in consideration of the dimensional shape (height difference) of the article 14 to be packaged. Moreover, the bag body 43 is good to make it form with a material with small frictional resistance with the cylindrical film 25, or to provide the surface layer which consists of the same raw material. When the bag body 43 is made of a material having a small thickness and a weak stiffness, the deformed shape is maintained to some extent, so that air can be smoothly and efficiently extracted. Of course, one with durability is good.

  The connection mechanism of the holding member 41 with respect to the end seal device 30 (upper top sealer 31) may be fixed so that the relative positional relationship with the top sealer 31 is fixed, but preferably the relative positional relationship is movable in the vertical direction. Is to do. In this way, when air is released from a large (high) packaged object 14, as shown in FIG. 4 (a), the top sealer 31 is relatively lifted and small (high). When air is ventilated from a low-packaged object, it is lowered relative to the top sealer 31 as shown in FIG. Thereby, even if the filling amount of the air in the bag body 43 is the same, the bag body 43 is deformed to the same extent with respect to the packaged object having different dimensions and shapes, and the tubular film 25 is mounted on the packaged object 14 in an appropriate state. The air can be vented along the surface. For the relative up-and-down movement, for example, a power source such as a cylinder or a drive motor may be used, or a restraining member 41 is attached to a guide rail extending in the vertical direction connected to the top sealer 31 so as to be movable up and down. You may make it fix by screwing etc. in a position.

  Further, as shown in FIG. 5A, when the height of the package 14 is high, the upper end of the package 14 may come into contact with the base plate 42. Then, the article 14 to be packaged is crushed, which is not preferable. Therefore, as shown in FIGS. 5B and 5C, it is preferable to attach a soft sponge or other cushioning material 45 to the lower surface of the base plate 42 and attach the bag body 43 to the lower surface of the cushioning material 45. When such a configuration is adopted, as shown in FIG. 5C, even if the upper end of the package 14 hits the cushioning material 45, the cushioning material 45 is a softer material than the base plate 42. 45 is deformed and damage to the package 14 can be prevented.

  FIG. 6 shows another form of the bag 43 '. In this embodiment, the shape of the lower surface 43 ′ a of the bag body 43 ′ facing the packaged object 14 has a shape corresponding to the shape of the packaged product to some extent (in the drawing, the longitudinal cross section is a semicircular recess for convenience). Good. If it concerns, it will deform | transform along the shape of a to-be-packaged item more smoothly, and the air bleeding in the cylindrical film 25 can be performed more reliably. Even in such a structure in which the shape of the lower surface 43 ′ a is appropriately modified, the cushioning material 45 can be provided between the base plate 42 as described above.

  Moreover, in each said embodiment, although it is set as the state which attached only one bag body, it does not prevent attaching a plurality. Furthermore, in each embodiment, the air bleeding device 40 is configured to link the restraining member 41 to the upper top sealer 31. However, the present invention is not limited to this, and the air bleeding device 40 is independent from the top sealer 31 without being connected thereto. Thus, it can be provided downstream of the end seal device 30.

  Further, the bag body is sealed at least during the air bleeding operation, but it is more preferable that the amount of air filled in the bag body can be adjusted prior to use. In order to perform such processing, a valve mechanism is provided in the bag body, and after opening the valve to supply or exhaust air, the valve is closed.

DESCRIPTION OF SYMBOLS 10 Pillow packaging machine 11 Packaged goods conveyance supply apparatus 12 Packaging machine main body 13 Unloading conveyor apparatus 14 Packaged goods 15 Sprocket 16 Endless chain 17 Feeding finger 20 Original roll 21 Strip film 22 Roller 24 Bag making machine 25 Cylindrical film 26 Lower part Belt 27 Center seal device 28 Upper restraint belt 29 Pinch roller 30 End seal device 31 Top sealer 32 Top sealer 40 Air venting device 41 Restraining member 42 Base plate 43 Bag body 45 Buffer material

Claims (5)

An air bleeder for a horizontal pillow wrapping machine, which is arranged on the carry-out side of a horizontal pillow wrapping machine equipped with an end seal device and pushes the air on the front side of the tubular film before being cut by the end seal device backward. And
A holding member capable of holding down the tubular film containing the packaged object from above, and a moving mechanism for moving the holding member up and down;
The holding member has a sealed bag body and a mounting member for attaching the bag body,
A cushioning material is provided between the attachment member and the bag body,
Loading of gas in the bag body, moving the gas inside the bag body can be freely performed, conform to the shape of said object to be packaged lower surface of the bag via the tubular film An air venting device for a horizontal pillow packaging machine, characterized in that   2. The air bleeder for a horizontal pillow packaging machine according to claim 1, further comprising adjusting means for adjusting the filling amount.   3. The air bleeder for a horizontal pillow packaging machine according to claim 1, wherein only one of the bags is provided on the mounting member.   4. The air bleeder for a horizontal pillow packaging machine according to claim 1, wherein the lower surface of the bag body has a shape corresponding to an outer shape of the article to be packaged.   5. The air bleeder for a horizontal pillow packaging machine according to claim 1, wherein at least a surface of the bag body is made of a material having a small frictional resistance with the tubular film. .

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