JP2017007714A - Pillow packaging machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To beautifully execute packing processing without making an article fall down in the longitudinal direction in a cylindrical film.SOLUTION: A pillow packing machine comprises a top seal device 25 for moving a pair of upper-lower sealers in the longitudinal direction for sealing and cutting a cylindrical film in the lateral direction. A packing object supplied to the cylindrical film is an article group of longitudinally juxtaposing a plurality of articles of a standing state. A side belt device for supporting a side surface of a packing film is arranged on the upstream side of the top seal device, and a side restraining device for preventing falling-in of the article of releasing support by a side belt device, is arranged on the downstream side of the side belt device. The side restraining device comprises a finger member 45 for pushing in to the inside by contacting with a nonexistent part of the packing object of a side surface of the packing film, and an inward pushing-in section by the finger member overlaps with a section for restraining the packing object by the side belt device, and a top sealer includes a position for starting to nip the cylindrical film.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a pillow packaging machine, and more specifically, for packaging unstable articles, more specifically, articles that easily fall over, such as a group of articles in which a plurality of standing articles are arranged in front and back, and articles that are easy to roll. It relates to the device.

  Conventionally, a package has various aspects, for example, there is a package in which a plurality of thin plate-like articles such as biscuits are stored. A pillow packaging machine for manufacturing such a package includes, for example, the following configuration.

  The pillow wrapping machine includes a transport and supply device that transports an article group configured by arranging upright articles in front and back, and a packaging machine body disposed on the downstream side of the transport and supply device. The packaging machine body includes a bag making device that forms a tubular film by forming a tubular film into a tubular shape on the carry-in side. On the downstream side of the bag making device, a center seal device that seals the end of the film that is formed in a cylindrical shape and passed through the bag making device is arranged. In addition, a group of articles sequentially carried out from the conveyance supply device is supplied into the bag making machine. Thereby, when an article group passes through the bag making machine, the article group is stored at predetermined intervals in the cylindrical film, and the article group is conveyed together with the cylindrical film. Then, the top seal device arranged on the carry-out side of the pillow wrapping machine produces a pillow wrapping body that encloses a group of articles by sealing and cutting the tubular film so as to cross the transverse direction at predetermined intervals. Is done.

  Since the article group is composed of a plurality of upright thin-plate-like articles, there is a possibility that individual articles may fall down. Therefore, like a packaging machine disclosed in Patent Document 1, there is a conveyance supply device or a conveyance device that conveys a cylindrical film that encloses a group of articles provided with a function of preventing articles from falling.

  Specifically, for example, it may be provided on both the left and right side surfaces of the tubular film and provided with restraining members that are in contact with the front and back packages. The restraining member is connected to, for example, an endless chain that rotates in a horizontal plane, and moves forward in accordance with the movement of the tubular film following the rotation of the endless chain.

Shokai 59-191301

  The conventional apparatus has the following problems. That is, on the upstream side of the top seal device, the front and back of the article to be packaged are conveyed by the restraining member. However, when the holding member is separated from the tubular film, the support of the package is lost, and the package may fall within the tubular film. Then, when sandwiching and sealing the film part between the first packaged article and the next packaged article in the cylindrical film with a pair of sealers, the fallen packaged article is bitten and normal packaging processing is performed. May not be able to continue.

  In order to solve the above-described problems, the pillow packaging machine of the present invention is (1) transporting a packaged article composed of a group of articles in which a plurality of standing articles are arranged in front and back in a state of being wrapped with a packaging film. Means, a top seal means disposed on the downstream side of the conveying means, and sealing and cutting the packaging film in a direction intersecting the traveling direction, and an outer peripheral surface of the packaging film disposed on the upstream side of the top seal means A restraining means that urges the article inward to prevent the article from overturning, and a side restraining means that is disposed downstream of the restraining means and prevents the article that has been unsupported by the restraining means from falling down. The side restraining means is in contact with a portion of the side surface of the packaging film where the article to be packaged does not exist and pushes the pushing member inward, and the pushing member is a horizontal plane. Drive means for revolving along a predetermined trajectory, wherein the predetermined trajectory has a section in which the section pushed inward by the pushing member partially overlaps a section that restrains the article to be packaged by the restraining member, and the top The pair of upper and lower top sealers of the sealing means is configured to include a position where the packaging film starts to be sandwiched.

  The article to be packaged conveyed together with the packaging film is conveyed in a state in which the articles are prevented from being overturned by the restraining means. When it reaches the vicinity of the top seal means, the support by the restraining means is released, so that the article may fall. In the present invention, since the pressing member that contacts the portion of the side surface of the packaging film where the article to be packaged does not exist and is pressed inward is provided, when the pressing member presses the side surface of the packaging film inward, the packaging film The lateral width of the article becomes narrow, and the fall of articles located before and after that is suppressed. Therefore, since the articles constituting the top package in front of the holding member are prevented from falling forward because the top of the packaging film is top-sealed, the article of the leading package falls down. Is suppressed. In addition, since the article constituting the second packaged object behind the restraining member is supported by the restraining means on the rear side, the fall of the article to the rear is suppressed, so that the second article to be packaged is suppressed. The fall of the packaged item is prevented.

  In the present invention, the section in which the pushing member pushes the packaging film inward overlaps with the support section by the restraining means on the upstream side, and the downstream side is provided up to a position where at least the top and bottom top sealers start to be sandwiched. It is possible to prevent the article from falling in the packaging film from the release of the support by the restraining means until it is sealed by the top sealing means.

  (2) The driving means includes a first driving means for moving the pushing member forward and backward along the conveyance direction of the packaging film, and a first driving means for moving the pushing member toward and away from the packaging film. The first drive means has a drive motor and a link mechanism for converting the rotational output of the drive motor into a reciprocating linear motion, and the packaging is provided at the center of the moving section of the reciprocating linear motion. The second driving means is adapted to match the film conveyance speed, so that the pushing section becomes the central portion, and the pushing member is separated from the side surface of the packaging film before and after the pushing section. It is good to configure.

  In this way, the forward and backward movement of the pushing member can be controlled with a simple configuration such as a drive motor and a link mechanism. In the reciprocating linear motion using the drive motor and the link mechanism, the speed cannot be made constant throughout the entire moving section in the front-rear direction, and the speed becomes slow in the section near the front and rear ends of the moving section. The speed difference from the moving speed of Therefore, in the present invention, instead of pushing in all the moving sections in the front-rear direction, a section is provided in which the pushing member moves forward in the same direction as the conveyance direction of the packaging film while being separated from the packaging film. While the wrapping film is being pushed inward with the pushing member, the moving speed of the wrapping film and the moving speed of the pushing member can be matched to prevent the article from falling down without giving stress to the wrapping film. So good.

  The matching of the moving speeds is not necessarily limited to the completely same speed, and may be any one that does not affect the packaging film even if there is a speed difference. Further, the section where the pushing member pushes the packaging film inward is the central portion, but it is not necessary to push over the entire section of the central portion, for example, a part of the front side or the rear side of the central portion. In this section, the pushing member may be in a non-contact state with the packaging film.

  (3) The pushing member may be a finger member having a bifurcated tip. By bifurcating, for example, the buffering of the sealer and the pushing member can be avoided more reliably.

  (4) The holding member is a side belt device provided with a guide belt that revolves in a horizontal plane, the side belt devices are arranged on both the left and right sides of the packaging film, and the guide belt is arranged on both sides of the packaging film. It is good to support the said to-be packaged object by inserting | pinching. If it does in this way, the article which constitutes an article to be packaged can be held and supported with a guide belt. In addition, the downstream end position of the guide belt may be close to the position where the packaging film is started to be sandwiched between the pair of sealers of the top seal device.

  (5) It is preferable that the side belt device has a plurality of guide belts on the upper and lower sides, and the pushing member can enter a space between the guide belts arranged on the upper and lower sides. If it does in this way, since a guide belt is arrange | positioned at the upper and lower sides of a pushing member, it can push inward, suppressing a packaging film stably.

  (6) The top seal means may be a rotary top seal means provided with an upper top sealer and a lower top sealer respectively attached to a pair of rotary shafts arranged above and below with the packaging film interposed therebetween.

  (7) The packaging machine passes through the bag making device, a bag making device that forms a continuously supplied belt-like film into a cylindrical shape, a conveyance supply means for supplying the packaged product to the bag making device, and the bag making device. And a center sealing means for sealing the polymerization end of the cylindrical film, which is the packaging film formed in a cylindrical shape, and disposed downstream of the center sealing means, and sealed and cut in the width direction of the cylindrical film. It is good to use the pillow type packaging machine provided with the said top-seal means and the conveyance conveyor apparatus which conveys the package cut and formed by the top-seal means.

  In the present invention, the packaging process can be performed neatly without the articles falling down in the front-rear direction in the packaging film.

It is a front view which shows one Embodiment of the packaging machine which concerns on this invention. It is a front view which shows the fall prevention apparatus which is the principal part. FIG. It is the side view. FIG. It is a front view which shows a side belt apparatus. FIG. It is a front view which shows a side suppression apparatus. FIG. It is the side view. FIG.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. It should be noted that the present invention is not construed as being limited thereto, and various changes, modifications, and improvements can be made based on the knowledge of those skilled in the art without departing from the scope of the present invention.

  FIG. 1 shows the overall configuration of a preferred embodiment of a pillow packaging machine according to the present invention. The pillow wrapping machine 10 is disposed on the upstream side of the wrapping machine body 11, the film supply device 12 that continuously supplies a belt-like wrapping film to the wrapping machine body 11, and the packaging machine body 11. And a transport and supply device 14 for supplying the package 13 to the machine body 11 at predetermined intervals.

  The film supply device 12 links the output of a driving motor (not shown) such as a servo motor or the like to a raw film 16 obtained by winding the belt-like film 15 in a roll shape. 16 is supplied to the packaging machine body 11 at a constant speed while appropriately controlling the rotation speed. Although not shown in the drawing, various rollers 22 (one representative is shown in the figure) are arranged at predetermined positions from the original film 16 to the packaging machine main body 11 and sent out from the original film 16. The belt-like film 15 is configured to be guided to the packaging machine main body 11 through a predetermined path by being stretched around the roller 22. Note that it is not always necessary to link the drive motor to the original film 16, and a feed roller is provided on the conveying path of the belt-like film 15, and the feeding force is given to the belt-like film 15 by the feed roller, so You may make it pull out continuously from a film.

  The article 13 to be packaged is an article group configured by arranging a plurality of upright articles 13a at the front and rear. The shape of the article 13a is a thin plate shape or a flake shape. In the present embodiment, the article 13a has a disk shape, but may have a rectangular shape or other various shapes. The article 13a used in the present embodiment is thin in addition to being thin and has a low stability in the standing state and is easy to fall down. However, as will be described below, the pillow packaging machine 10 can be stably transported and packaged by providing a fall prevention function. Moreover, although the articles | goods 13a are a biscuit, a cookie, etc., for example, it is not limited to this.

  The transport and supply device 14 includes a front and rear sprocket 17 (shown only in front in the traveling direction in the drawing), an endless chain 18 spanned across the plurality of sprockets 17, and a front finger attached to the endless chain 18. 19a and rear finger 19b. The front finger 19a and the rear finger 19b carry a pair of front and rear to carry the article 13 to be packaged. That is, the distance between the front finger 19a and the rear finger 19b is substantially equal to the longitudinal length of the article 13 to be packed, and the article 13a falls in the front-rear direction when the article 13a is conveyed while being sandwiched from the front and rear. To prevent. Moreover, although illustration is abbreviate | omitted, the horizontal wall is provided in the both sides of the conveyance path of the to-be-packaged goods 13. As shown in FIG. This lateral wall prevents the movement of the article 13a in the lateral direction. Further, a plurality of sets of front fingers 19a and rear fingers 19b are attached to the endless chain 18 at a predetermined pitch. Thereby, the conveyance supply apparatus 14 conveys the to-be-packaged object 13 with the stable attitude | position, and supplies it to the packaging machine main body 11 of the next stage at a fixed space | interval.

  The packaging machine main body 11 includes a bag making device 20 that sets the supplied belt-like film 15 into a cylindrical film 21, a center seal device 24 disposed on the downstream side of the bag making device 20, and the center seal device 24. A belt conveyor 23 that conveys the tubular film 21, a top seal device 25 that is disposed on the downstream side of the belt conveyor 23, and a carry-out conveyor 26 that is disposed on the downstream side of the top seal device 25. It is equipped with.

  The bag making device 20 passes the belt-like film 15 continuously supplied from the film supply device 12, thereby forming the tubular film 21 by making the belt-like film into a cylinder. Along with this passage, both side edge portions 21a of the film come into contact with each other. Further, the articles to be packaged 13 that are sequentially supplied from the transport and supply device 14 to the packaging machine body 11 are inserted into the bag making machine 20. Thereby, the to-be-packaged goods 13 supplied to the bag making machine 20 are arrange | positioned in the cylindrical film 21 for every predetermined space | interval.

  The center seal device 24 seals both side edge portions 21 a of the tubular film 21. The center seal device 24 heats and seals both side edge portions 21a while being sandwiched from both sides and heated. Further, the center seal device 24 of the present embodiment includes a pair of roller-type or bar-type sealers 24a and pinch rollers 24b and 24c arranged before and after the sealer 24a.

  The top seal device 25 includes a pair of upper and lower rotating shafts 25a arranged vertically so as to face each other with the tubular film 21 therebetween, an upper top sealer 25b attached to the upper rotating shaft 25a, and a lower rotating shaft 25a. And a lower top sealer 25c attached to. In addition, the upper top sealer 25b and the lower top sealer 25c have a built-in heater, and the sealing surfaces at the tips of each other are heated to a predetermined temperature. Further, a cutter blade 25d is built in the central portion in the front-rear direction of the seal surface of the upper top sealer 25b. In addition, a receiving blade 25e is built in the central portion in the front-rear direction of the seal surface of the lower top sealer 25c. The upper and lower rotary shafts 25a and thus the upper top sealer 25b and the lower top sealer 25c rotate in synchronization, and the seal surfaces of the upper top sealer 25b and the lower top sealer 25c come into contact with each rotation. Therefore, the tubular film 21 is sandwiched and heated and pressurized during this contact. Furthermore, the cutter blade 25d and the receiving blade 25e cut the cylindrical film 21 at the time of this contact.

  Then, the top seal device 25 seals and cuts a portion of the center-sealed tubular film 21 where there is no package object in the lateral direction. Thereby, the front-end | tip part which includes the to-be-packaged product 13 of the head of the cylindrical film 21 is isolate | separated from the cylindrical film 21, and the package body 27 is manufactured. Then, the package 27 is conveyed on the carry-out conveyor 26.

  In this embodiment, the fall prevention apparatus 29 which prevents that the articles | goods 13a which comprise the to-be-packaged item 13 in the cylindrical film 21 in conveyance fall is provided. As shown in FIGS. 2 to 5, the fall prevention device 29 is disposed on the upstream side of the top seal device 25, and includes a side belt device 30 that suppresses the side surface of the tubular film 21 being conveyed from both sides, and the side belt device 30. The side restraint device 31 is provided which is disposed on the downstream side and pushes the side surface in the tubular film 21 inward.

  The side belt devices 30 are arranged on both the left and right sides above the belt conveyor 23. Each of the left and right side belt devices 30 includes two upper guide belts 32 and lower guide belts 33 arranged at a predetermined interval in the vertical direction, as shown in FIGS. The upper guide belt 32 is stretched around an upper drive pulley 34 and an upper driven pulley 35 arranged at predetermined positions in the front and rear directions along the conveyance direction of the tubular film 21, and rotates and moves along a predetermined locus in a horizontal plane. The lower guide belt 33 is wound around a lower drive pulley 36 and a lower driven pulley 37 disposed at predetermined positions in the front and rear directions along the conveyance direction of the tubular film 21, and rotates and moves along a predetermined locus in a horizontal plane. The upper drive pulley 34 and the lower drive pulley 36 are arranged so as to overlap with each other and are connected to the same rotation shaft 38 and integrally rotate. Similarly, the plurality of upper driven pulleys 35 and the plurality of lower driven pulleys 37 are arranged such that the corresponding driven pulleys overlap each other and are connected to the same rotation shaft 39.

  A power transmission pulley 40 is connected to the upper end of the rotary shaft 38 to which the upper drive pulley 34 is connected. A power transmission belt 43 is stretched between the power transmission pulley 40 and a drive pulley 42 linked to the output shaft of the drive motor 41. Thereby, the rotation output of the drive motor 41 is transmitted to the upper drive pulley 34 and the lower drive pulley 36 via the power transmission belt 43, and the upper guide belt 32 and the lower guide belt 33 are rotationally driven integrally. And the moving speed of a belt surface is made equal to the conveyance speed of the cylindrical film 21 and the to-be-packaged goods 3 by the belt conveyor 23. FIG.

  The locus of rotational movement of the upper guide belt 32 and the lower guide belt 33 includes a straight section K1 that moves along the tubular film 21 and an inclined approach section K2 on the upstream side of the straight section K1. The distance between the left and right upper guide belts 32 and the lower guide belt 33 in the straight section K1 is substantially the same as the lateral width of the article 3 to be packaged. Accordingly, when the tubular film 21 is sandwiched between the left and right side belt devices 30, the article 3 can be sandwiched and held from both sides via the tubular film 21. Then, when the upper guide belt 32 and the lower guide belt 33 rotate and move in accordance with the conveyance by the belt conveyor 23 in the held state, the packaging material 3 is stabilized while being pinched from both sides and prevented from falling. Transport.

  Furthermore, in the inclined approach section K2, the distance between the opposing belt surfaces becomes longer as it goes upstream. When the tubular film 21 moves in the inclined approach section K2, the pair of left and right upper guide belts 32 and lower guide belts 33 located on both sides gradually approach the side surfaces of the tubular film 21 and finally come into contact with each other. The cylindrical film 21 and thus the article to be packaged 13 are sandwiched between the upper and lower sides of the side surface. The moving speed of the belt surface in the straight section K1 following the inclined approach section K2 is equal to the moving speed of the carry-out conveyor 26, and the package 13 in the tubular film 21 is the upper guide belt 32 of the side belt device 30. The individual articles 13a move together with the tubular film 21 while maintaining the frame standing state.

  The downstream ends of the upper guide belt 32 and the lower guide belt 33 are positioned near the installation of the top seal device 25. More specifically, the upper top sealer 25 b and the lower top sealer 25 c of the top seal device 25 are set in the vicinity of positions where they contact the tubular film 21. In the present embodiment, as will be described later, a side restraining device 31 is provided, and the upper guide belt 32 is prevented from falling over the article 13a of the article 13 to be packaged before and after the film portion to be top-sealed by the side restraining device 31. And the downstream side of the lower guide belt 33 does not necessarily have to be in the vicinity of the position where it contacts the tubular film 21 of the top sealer.

  Moreover, even if the downstream ends of the upper guide belt 32 and the lower guide belt 33 are brought close to the top seal device 25, for example, when the article 13a is a very thin object such as potato chips or thin roasted rice cracker, If the article 13a on the front side of the article 13 to be packaged is not held by both guide belts, it may fall to the front side.

  As shown in FIG. 8 to FIG. 11 and the like, the side restraint device 31 can contact the portion of the side surface of the tubular film 21 where the packaged item 13 does not exist immediately before the top seal device 25 and can be pushed inward. The pressing member prevents the article 13a from falling down in the front-rear direction directly or indirectly. In this embodiment, the push-in member is a finger member 45 whose tip is bifurcated.

  The finger member 45 is arranged in parallel with a predetermined interval in the front and rear at a rod-like support rod 45a arranged so as to extend along the conveying direction of the tubular film 21, and a downstream end of the support rod 45a. A first claw portion 45b and a second claw portion 45c. The 1st nail | claw part 45b is located in the front side of the conveyance direction of the cylindrical film 21, and the 2nd nail | claw part 45c is located in a back side. And the space | interval of the 1st nail | claw part 45b and the 2nd nail | claw part 45c is made longer than the thickness of the upper side top sealer 25b and the lower side top sealer 25c, ie, the length of the direction parallel to the conveyance direction of the cylindrical film 21. ing. Thereby, by adjusting the relative positions of the finger member 45, the upper top sealer 25b, and the lower top sealer 25c, the inside of the portion of the tubular film 21 pushed in by the first claw portion 45b and the second claw portion 45c. The top seal.

  Both the first claw portion 45b and the second claw portion 45c are arranged so as to protrude toward the inner side, that is, the tubular film 21, with respect to the support rod 45a. And this side restraint device 31 has the 1st nail | claw part 45b and the 2nd nail | claw part 45c of the finger member 45 in the site | part to which the to-be-packaged goods 13 of the side surface of the cylindrical film 21 which the side belt apparatus 30 did not restrain. Are brought into contact with each other and pushed inward, so that the width of the tubular film 21, that is, the width in the direction orthogonal to the conveying direction becomes narrower than the width of the article 13 a. This prevents the article 13a from falling in the front-rear direction directly or indirectly by the claw portion.

  In the present embodiment, two finger members 45 having the above-described configuration are prepared, and are arranged to face each other on both the left and right sides in the conveyance direction of the tubular film 21 so that the mutual claw portions face each other. The pair of finger members 45 move forward and backward along the conveyance direction of the tubular film by the driving device, and also move in a direction orthogonal to the direction of forward and backward movement. The two finger members 45 move forward and backward along the transport direction of the tubular film with the claws facing each other, and move toward and away from each other at an appropriate timing. As a drive device for such movement, a first drive device 46 for moving forward and backward, and a second drive device 47 for moving the approach and separation are provided.

  The first drive device 46 is moved forward and backward in a direction parallel to the conveyance direction of the tubular film 21 by the drive motor 48, a link mechanism 49 that converts the rotational output of the drive motor 48 into a reciprocating linear motion, and the link mechanism 49. A moving support base 59 and the like are provided. The link mechanism 49 includes a first link 51 whose one end is linked to an eccentric position with respect to the rotating plate 50 that rotates as the drive motor 48 rotates, a second link 52 linked to the first link 51, A third link 53 linked to the second link 52 and a fourth link 54 linked to the third link 53 are provided. The movement support base 59 is linked to the other end of the fourth link 54. The movable support base 59 is composed of a plate member arranged on a vertical plane, and the fourth link 54 is linked to the inner side surface of the movable support table 59, and the slider 57 is attached to the outer side surface thereof. The slider 57 is linked to a guide rail 58 disposed so as to extend in a direction parallel to the conveyance direction of the tubular film 21. Accordingly, the slider 57 can stably move back and forth along the guide rail 58.

  In the present embodiment, the first drive device 46 that moves the two finger members 45 forward and backward is driven in synchronization with the output of the same drive motor 48. Specifically, the first link 51 and the second link 52 are shared, and the other end of the second link 52 is linked to the rotation shaft 56. The rotation shaft 56 is supported by the bearing portion 55 so as to be rotatable about the axis. Then, one end of the third link 53 is connected to both ends of the rotating shaft 56 and integrated. Thus, following the rotation of the drive motor 48 and thus the rotating plate 50, the second link 52 rotates forward and backward within a predetermined angle range around the rotational shaft 56, and the forward / reverse rotation is performed via the rotational shaft 56. It is transmitted to the three links 53. That is, the third link 53 rotates forward and backward within a predetermined angle range around the rotation shaft 56. Along with this forward / reverse rotation, the fourth link 54 linked to the other end of the third link 53, and thus the moving support base 59 linked to the other end of the fourth link 54, along the conveyance direction of the tubular film 21. Move back and forth.

  A support plate 60 extending in the horizontal direction is connected to the lower end of the movable support base 59, and a cylinder 61 is connected to the lower surface of the support plate 60. The cylinder 61 is disposed so that its cylinder rod 61a faces and protrudes toward the inside (tubular film 21 side). The cylinder rod 61a of the cylinder 61 reciprocates in a direction perpendicular to the transport direction of the tubular film 21 in a horizontal plane.

  A connecting bar 62 is attached to the tip of the cylinder rod 61a. The connecting bar 62 is attached so as to extend in a direction parallel to the conveying direction of the tubular film 21. Then, the finger member 45 is attached to the tip of the connecting bar 62. The cylinder 61, the connecting bar 62, and the like constitute the second drive device 47.

  Further, the finger member 45 supported by the connecting bar 62 is installed at the same height as the space between the upper guide belt 32 and the lower guide belt 33. Then, the finger member 45 that moves back and forth along the conveying direction of the tubular film 21 by the first driving device 46 can enter the space between the upper guide belt 32 and the lower guide belt 33 (in FIG. 7). , See finger member 45 indicated by reference numeral 45 (1)). That is, in this embodiment, the suppression section to the cylindrical film 21 and the package 13 by the side belt device 30 and the suppression section to the cylindrical film 21 and the package 13 by the side suppression device 31 are partially overlapped. The articles 13a are prevented from falling without a break.

  Next, the sealing process in the top seal device 25 and the control of the operation of each device corresponding thereto will be described. The revolution movement of the finger member 45 along a predetermined trajectory in the horizontal plane is controlled by the first driving device 46 and the second driving device 47.

  First, during the movement of the tubular film 21 on the carry-out conveyor 26, both side surfaces thereof are supported by the side belt device 30. Therefore, in the installation section of the side belt device 30, the articles 13 to be packaged supplied into the tubular film 21 maintain the state in which the articles 13 a stand up with the movement of the tubular film 21, and move forward stably. It moves to the vicinity of the top seal device 25.

  By the way, the upper guide belt 32 and the lower guide belt 33 arranged along the cylindrical film 21 move along the periphery of the upper driven pulley 35 and the lower driven pulley 37 arranged on the downstream side, and the cylindrical film 21. Release the side support. Therefore, for example, when the urging of the side surface of the tubular film 21 is released at a position farther upstream than the position where the tubular film 21 is sandwiched between the upper top sealer 25b and the lower top sealer 25c, the article 13a falls down. There is a fear.

  Specifically, in the state where the packaging is continuously performed, if the top seal is applied by the top seal device 25 and the package 27 is manufactured, the upper top sealer 25b and the lower top sealer 25c are During one rotation, the leading portion of the subsequent tubular film 21 passes through the top seal device 25 and is located downstream of the top seal device 25. Then, as the conveyance of the tubular film 21 proceeds, the leading article 13 gradually moves downstream from the side belt device 30, and the support from the side belt device 30 is sequentially released from the front article 13a. Is done. At this time, the article 13a on the front side of the leading article 13 that has been unsupported from the side belt device 30 has a leading end portion of the tubular film 1 that is top-sealed and closed on the front side thereof, and thus the traveling direction. It will not fall forward. In addition, since the article 13a on the rear side of the article to be packaged is supported by the side belt device 30 and maintains an upright state, the article 13a on the front side whose support is released does not fall forward in the traveling direction. Therefore, it moves forward while maintaining the standing state.

  Then, when the rear end of the leading article 13 is separated from the side belt device 30, the leading article 13 is not supported from the side belt device 30, and the rear article 13a may fall backward. And Further, when the conveyance of the tubular film 21 further proceeds and the front end of the second article to be packaged 13 is located on the downstream side of the side belt device 30, the side of the second article to be packaged 13 on the front side with respect to the article 13a. Support from the belt device 30 is lost. As a result, the article 13a on the front side tends to fall forward. In particular, when the article 13a is thin, in order to reliably avoid interference with the upper top sealer 25b and the lower top sealer 25c even if the downstream end position of the side belt device 30 is brought close to the top seal device 25. Because there is a certain amount of space, it tends to collapse.

  Therefore, in the present embodiment, before the article 13a falls down, that is, before the article 13a is no longer supported from the side belt device 30, the first claw part 45b and the second claw part 45c of the finger member 45 are The predetermined position on the side surface of the cylindrical film 21 is pushed inward from both sides, and the finger member 45 moves at substantially the same speed as the cylindrical film 21 in this state. The finger member 45 includes a first driving device 46 and a second driving device so that the upper top sealer 25b and the lower top sealer 25c are separated from the cylindrical film 21 in accordance with the timing at which the cylindrical film 21 starts to be sandwiched from above and below. 47 controls.

  In the present embodiment, since the first drive device 46 converts the rotation of the drive motor 48 and thus the rotating plate 50 into the reciprocating linear motion by the link mechanism 49, the moving speed of the reciprocating linear motion is not constant. That is, the speed while moving in the central part in the moving section is high, and the speed is low at both ends. Therefore, the first drive device 46 sets the moving speed of the central portion to be equal to the moving speed of the tubular film 21. In the cylinder 61 constituting the second drive device 47, the cylinder rod 61a moves forward in the section moving in the central portion, the tip projects toward the cylindrical film 21, and the finger member 45 is cylindrical. The side of the film 21 is pushed inward. In addition, the cylinder rod 61 a is housed inside the front and rear ends by multiple operations, and the finger member 45 is separated from the side surface of the tubular film 21.

  As described above, in order to start the support by the finger member 45 before the support of the article 13a of the article 13 to be packaged by the side belt device 30 is released, the first drive device 46 and the second drive device 47 are as follows. Behaves like First, the finger member 45 is in a standby position in which the finger member 45 is separated from the tubular film 21 by the backward movement of the cylinder rod 61a of the cylinder 61 of the second driving device 47, and in this state, the finger member 45 is moved to the most upstream position. (Refer to reference numeral 45 (1) in FIG. 7).

  Next, with the rotation of the rotating plate 50, the slider 57 and thus the finger member 45 start moving toward the downstream side. Then, the cylinder rod 61 a of the cylinder 61 moves forward at a predetermined timing to move the finger member 45 toward the cylindrical film 21, and the first claw portion 45 b and the second claw portion 45 c are side surfaces of the cylindrical film 21. Is slightly pushed inward (see reference numeral 45 (2) in FIG. 7). The predetermined timing for moving the cylinder rod 61a forward is before the moving speed of the finger member 45 is equal to the moving speed of the tubular film 21 and the product 13a resulting from the first package 13 is separated from the side belt device 30. It is.

  Thereafter, the finger member 45 moves forward in a certain section in accordance with the movement of the tubular film 21. In this fixed section, since the finger member 45 maintains the state where the tubular film 21 is pushed in, the article 13a is prevented from falling during the movement. The above-described fixed section is until the upper top sealer 25b and the lower top sealer 25c start to sandwich the tubular film 21 from above and below. When the upper top sealer 25b and the lower top sealer 25c start to sandwich the tubular film 21 from above and below, the tubular film 21 is pushed inward from above and below, and the falling of the article 13a is suppressed. Therefore, even if the finger member 45 is separated at this timing, the article 13a does not fall down. Then, the upper top sealer 25b and the lower top sealer 25c rotate, and sandwich the tubular film 21 from above and below, pressurize and heat it, and perform top sealing. At this time, since the article 13a does not fall down as described above, the article 13a is not bitten.

  On the other hand, the finger member 45 separated from the tubular film 21 is further moved forward by the first driving device 46 while being separated (see reference numeral 45 (3) in FIG. 7). And when it reaches the most downstream position, it reverses the moving direction and proceeds toward the upstream side. The reason why it does not reverse immediately after separating from the tubular film 21 is that the moving speed in the front-rear direction near the most downstream position where it is reversed is slower than the moving speed of the tubular film 21. That is, while the finger member 45 is in contact with the tubular film 21, the finger member 45 moves at substantially the same speed and secures a deceleration zone from when the finger member 45 is separated to when it is reversed. Then, the finger member 45 reaches the most upstream position (see reference numeral 45 (1) in FIG. 7) in a state where the finger member 45 is separated from the tubular film 21, and thereafter, the above-described processing is repeated.

In the embodiment described above, the pushing member is the finger member 45 whose tip is branched in a bifurcated shape, but the present invention is not limited to this, and for example, the side surface of the tubular film 21 is pushed in a line shape in a plate shape. You may do it.
In the above-described embodiment, the finger member 45 is controlled so as to be separated from the side surface of the tubular film 21 at the timing when the top sealers 25b and 25c start to sandwich the tubular film 21, but the present invention is limited to this. For example, the finger member 45 may be separated from the side surface of the tubular film 21 at an arbitrary timing immediately before the top sealers 25b and 25c are engaged with each other. In particular, it is preferable that the finger member 45 is pushed into the side surface of the tubular film 21 just before the top sealers 25b and 25c are engaged with each other, because the article 13a can be more reliably prevented from falling down.

Further, in the above-described embodiment, the upper and lower portions respectively arranged on the left and right sides of the conveying path as the devices (suppressing means) for preventing the articles to be packaged (articles) in the cylindrical film being conveyed on the upstream side of the top seal device from falling down. Although the side belt device 30 that sandwiches the tubular film 21 with two guide belts is used, the present invention is not limited to this, and the number of guide belts is arbitrary. Moreover, the suppression apparatus which suppresses the fall of articles | goods, without using a guide belt may be sufficient.
Further, the restraining means is not limited to the one that is disposed on both sides of the conveyance path of the packaging film, such as the side belt device 30, and biases the left and right side surfaces of the packaging film inward. What is necessary is just to urge | bias the outer peripheral surface of a packaging film toward inward, such as what arrange | positions above and energizes the upper surface of a packaging film toward the downward direction.

  In the above-described embodiment, an example in which the present invention is applied to a packaging machine provided with the rotary top seal device 25 has been shown. However, the present invention is not limited to this, for example, a state in which the seal surfaces of a pair of sealers are opposed to each other It may be applied to a device using a box motion type top seal device that moves the pair of sealers along a predetermined trajectory while holding the.

  In the above-described embodiment, an example in which the present invention is applied to a pillow packaging machine (including a reverse pillow type in which the center seal device is disposed on a cylindrical film) is shown as a packaging machine. However, the present invention is limited to this. No, for example, a three-sided package that folds a belt-like film from the center into a substantially U shape, seals the film part located at one side edge in the transport direction, and end-seals the front and rear positions of the product in the lateral direction Applicable to machine and other various packaging machines.

  The first drive device 46 uses a device that converts the rotational output of the drive motor into a reciprocating linear motion by a link mechanism. However, the present invention is not limited to this, for example, the drive source is a cylinder or other linear motion. Alternatively, the mechanism for converting to the reciprocating linear motion when the drive motor is used may be other than the link mechanism. However, if the configuration of the present embodiment is adopted, a desired distance can be moved with a simple configuration. Further, the above-described embodiments and modifications can be combined as appropriate.

DESCRIPTION OF SYMBOLS 10 Pillow packaging machine 11 Packaging machine main body 12 Film supply apparatus 13 Packaged article 13a Article 14 Conveyance supply apparatus 15 Strip film 16 Original film 20 Bag making machine 21 Cylindrical film 23 Belt conveyor 24 Center seal apparatus 25 Top seal apparatus 25a Rotation Shaft 25b Upper top sealer 25c Lower top sealer 26 Unloading conveyor 27 Packing body 29 Fall prevention device 30 Side belt device 31 Side restraint device 32 Upper guide belt 33 Lower guide belt 45 Finger member 45b First claw portion 45c Second claw portion 46 First drive unit 47 Second drive unit 48 Drive motor 49 Link mechanism 50 Rotating plate 61 Cylinder 61a Cylinder rod

Claims (7)

Conveying means for conveying an article to be packaged consisting of a group of articles in which a plurality of standing articles are arranged back and forth, wrapped in a packaging film;
A top sealing means that is disposed downstream of the conveying means and seals and cuts the packaging film in a direction intersecting the traveling direction;
A suppressing means that is disposed on the upstream side of the top seal means and biases the outer peripheral surface of the packaging film inward to suppress the article from falling down;
Side restraining means disposed on the downstream side of the restraining means and preventing the article from being supported by the restraining means from falling down,
The side restraining means is a driving member that makes contact with a portion of the side surface of the packaging film where the article to be packaged does not exist and pushes inward, and a drive that revolves the pushing member along a predetermined locus in a horizontal plane. Means and
In the predetermined trajectory, a section that is pushed inward by the pushing member partially overlaps a section that holds the article to be packaged by the holding member, and a pair of upper and lower top sealers of the top seal means sandwich the packaging film. A packaging machine configured to include a starting position. The driving means includes first driving means for moving the pushing member forward and backward along the conveyance direction of the packaging film, and second driving means for moving the pushing member toward and away from the packaging film. Have
The first drive means has a drive motor and a link mechanism that converts the rotational output of the drive motor into a reciprocating linear motion, and is adapted to the transport speed of the packaging film in the central portion of the moving section of the reciprocating linear motion. West,
The second driving means is configured such that the section to be pressed is the central portion, and the pressing member is separated from the side surface of the packaging film before and after the section to be pressed. The packaging machine according to 1.   The packaging machine according to claim 1 or 2, wherein the pushing member is a finger member having a bifurcated tip. The restraining member is a side belt device provided with a guide belt that revolves within a horizontal plane,
The said side belt apparatus is arrange | positioned on the both right and left sides of the said packaging film, It inserted | pinched from the both sides of the said packaging film with the said guide belt, and the said to-be packaged object was supported. Item 1. A packaging machine according to item 1. The side belt device has a plurality of guide belts in the vertical direction,
The packaging machine according to claim 4, wherein the push-in member is allowed to enter a space between the guide belts disposed above and below the guide belt.   The top seal means is a rotary type provided with an upper top sealer and a lower top sealer respectively attached to a pair of rotary shafts arranged above and below with the packaging film interposed therebetween. The packaging machine according to any one of 5.   The packaging machine includes a bag making device that forms a continuously supplied belt-like film into a cylindrical shape, a transport and supply means that supplies the packaged product to the bag making device, and a tube passing through the bag making device. A center sealing means for sealing the polymerization end of the cylindrical film, which is the packaging film formed in a shape, and the top arranged on the downstream side of the center sealing means for sealing and cutting in the width direction of the cylindrical film It is a pillow type packaging machine provided with the sealing means and the conveyance conveyor apparatus which conveys the packaging body cut and formed by the top sealing means, The any one of Claims 1-6 characterized by the above-mentioned. Packaging machine as described in.

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