JP2010105669A - End sealing device and wrapping machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an end sealing device that manufactures products (wrapped bodies) of different widths without, for example, interchanging components. <P>SOLUTION: The sealing surfaces 31a and 32a of top sealers 31 and 32, which are disposed on the upper and lower sides across a tubular film, are each formed wider at one end. Each of the wider sealing parts is provided with a cutter 44 for cutting a side edge of the tubular film. The top sealers are supported by a machine frame 35. The machine frame is installed on a moving base 50 that laterally reciprocates as a handle 53 rotates. According to the width of a body being wrapped, the top sealers are laterally moved in the advancing direction of the tubular film, as required, so that each cutter is located on the side edge of the tubular film. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an end seal device and a packaging machine.

  A pillow packaging machine, which is one form of a packaging machine, has the following configuration. First, the strip-shaped film wound up by the raw fabric roll is continuously supplied to the bag making device, and when the bag making device is passed, the tubular film formed into a tubular shape is formed. In addition, an article transporting and supplying device is arranged on the upstream side of the bag making device, and an object to be packaged conveyed at predetermined intervals from the object to be packaged conveying and supplying device is supplied into the bag making device. Accordingly, when the article to be packaged passes through the bag making machine, the article to be packaged is stored at predetermined intervals in the cylindrical film, and the article to be packaged is conveyed together with the cylindrical film. A center seal device and an end seal device are arranged along the conveying direction. The center seal device seals the film polymerization end of the tubular film. The end seal device seals the tubular film in the lateral direction of travel (portion where the front and rear packages are not present) and cuts the portion of the tubular film in which the front package is stored. Is separated from the subsequent cylindrical film to produce a package.

As this type of package, for example, as shown in FIG. 1, one side edge of the end seal part 2 of the package 1 is formed wide, and from the side edge to the wide seal part 2a formed wide. There is what formed the incision 3 toward the center. And when opening the packaging body which concerns, it can open easily by tearing a film from the cut 3. An example of this type of package and a packaging machine for manufacturing such a package is disclosed in Patent Document 1, for example.
JP-A-61-125

  However, the conventional apparatus described above has the following problems. That is, needless to say, the shape and shape of the package are various. And the packaging machine can respond | correspond to the packaging body from which the dimension of a width direction or a longitudinal direction differs by changing / adjusting the operation timing of each apparatus, such as an end seal apparatus.

  However, in the case of a packaging machine that manufactures a packaging body that forms a cut in the above-described end seal portion, for example, to use a packaging machine having the same configuration to produce a packaging body that packages a product having a dimension change in the width direction Can not. In other words, in the case of a general packaging machine that does not have the above-mentioned notches, the length of the end sealer of the end seal device is set to be long in advance, so that it is possible to change the dimension in the width direction within the range of the length. it can. In contrast, in the case of a package to be manufactured by the present invention, since it is necessary to form a cut from the side edge of the package, for example, in an end seal device for manufacturing a wide package, When trying to manufacture a narrow package, the side edge of the narrow package is naturally located in the inner direction (the center in the direction of travel) of the wide package, so the wide package If the end seal device used in the above is used, it is not possible to form an opening cut in a narrow package.

  As a result, when trying to manufacture a package having different width dimensions with one packaging machine, at least the end sealer (with a cutter that forms a notch) will be replaced, and the attachment / detachment replacement work becomes complicated. In addition, the adjustment of the alignment of the sealer is required with the replacement of the end sealer, which increases the complexity. Therefore, it is not possible to easily change to a package having a different width direction.

  An object of the present invention is to provide an end seal device and a packaging machine capable of manufacturing a product (packaging body) having different dimensions in the width direction without an operation such as part replacement.

  In order to achieve the above-described object, an end seal device according to the present invention is (1) an end seal device that seals and cuts a packaging film that encloses an object to be packaged in the lateral direction of the packaging film. In addition, the sealing surface of the top sealer arranged above and below the packaging film is formed wide at one end side, and at least one of the top sealers arranged above and below, the wide sealing part formed at the above width In addition, a cutting cutter for cutting a side edge of the packaging film is provided, and the top sealers arranged above and below are provided so as to be movable in the lateral direction of the packaging film.

  The packaging film corresponds to the tubular film 21 in the embodiment. In this way, not only the case where the package is contained in one film but also the case where the package is contained using two films (for example, in the case of a four-side sealed package) is included. The top sealer may be of a so-called box motion type in which the seal surface always moves in a state of being opposed to each other, or may be a rotary type that rotates about a rotation axis that is connected to the opposite side of the seal surface. In the embodiment, the drive source for enabling movement is manually operated, such as rotating the handle, but power such as a motor or a cylinder may be used. Further, in this embodiment, the incision formed by the incision cutter is parallel to the end seal portion, but the present invention does not necessarily need to be in parallel and may be arranged obliquely. However, if the film material has the property of being easily torn in the direction in which the cut is directed, it is preferable that the film material be parallel because it can be opened more clearly.

  According to the present invention, the top sealer can be moved in the horizontal direction in accordance with the width of the package to be manufactured. Thereby, a wide seal | sticker site | part and the cutter for cutting can be arrange | positioned in the appropriate position of the side edge of a packaging film. Therefore, it is possible to form a cut without manufacturing a product (packaging body) having different dimensions in the width direction without performing work such as part replacement.

  (2) Although various mechanisms can be used for moving the top sealer in the horizontal direction, for example, the top sealers arranged above and below are arranged on the side walls arranged on both outer sides in the traveling direction of the packaging film. On the other hand, it is preferable to adopt a configuration in which a movable table that is rotatably supported and supports the side wall thereof is arranged so as to be movable in the lateral direction of the traveling direction because it can be realized with a simple configuration. Here, the rotation includes both revolution in the box motion type and rotational rotation. In the embodiment, the side wall is realized by a machine frame. Such a frame body is preferable because the strength increases, but the side walls do not necessarily have to be connected on the upper side or the lower side.

  (3) The packaging film may be a stretched film. Although the material of a packaging film is not specifically limited, Since the packaging body using a stretched film is easy to tear to a horizontal direction, it is suitable as a packaging film for packaging bodies which have this kind of cut.

  (4) A packaging machine according to the present invention includes the end seal device according to any one of (1) to (3) above. As the packaging machine, a pillow packaging machine (in particular, a horizontal pillow packaging machine in which the conveyance direction of the packaging film is horizontal) is suitable as shown in the embodiment, but it can be applied to a four-side seal packaging machine and other packaging machines. Moreover, even if it is a deep drawing packaging machine etc., if it is a type in which only one package is formed horizontally, it is applicable.

  The present invention can form an opening cut in a package such as a pillow package without requiring replacement of the top sealer or the like even when there is a change in dimensions in the width direction due to a product change or the like.

  2 to 4 show a first preferred embodiment of the present invention. The horizontal pillow packaging machine 10 in which the end seal device of this embodiment is incorporated includes a packaging machine body 11, a film supply device 12 that continuously supplies a belt-like packaging film to the packaging machine body 11, and a packaging machine body. 11 is provided on the upstream side of the packaging material supply device 14 for supplying the packaging material 13 to the packaging machine body 11 at predetermined intervals.

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

  The package transporting and supplying device 14 includes a sprocket 17 (only the front in the traveling direction is shown in the figure) arranged at the front and rear, an endless chain 18 spanned over the plurality of sprockets 17, and a predetermined pitch on the endless chain 18. It is comprised by the several pushing finger | toe 19 attached for every. Thereby, when the pushing finger 19 hits the rear surface of the article 13 to be packaged, the article 13 also moves forward with the movement of the pushing finger 19.

  The packaging machine main body 11 includes a bag making device 20 for making a bag-like film 15 to be supplied 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, an upper restraining belt 25 that is disposed above the belt conveyor 23, an end seal device 30 that is disposed on the downstream side of the belt conveyor 23, And an unloading conveyor 26 disposed on the downstream side of the end seal device 30.

  The bag-making device 20 allows the side film edges 15a of the belt-like film 15 to contact (polymerize) with each other by passing the belt-like film 15 continuously supplied from the film feeding device 12, and the tube that has become cylindrical. Bag-like film 21 is made. In addition, the articles to be packaged 13 that are sequentially supplied from the article to be packaged supply apparatus 14 to the packaging machine main body 11 are inserted into the bag making machine 20. Thereby, the article 13 to be packaged supplied to the bag making machine 20 is arranged in the cylindrical film 21 at predetermined intervals.

  The center seal device 24 seals both side edge portions 15a of the polymerized belt-like film 15. This center seal device 24 heat-seals by heating while sandwiching both side edge portions 15a of the belt-like film 15 from both sides.

  The upper restraining belt 25 is arranged in the immediate vicinity of the upstream side of the end seal device 30 and suppresses the article 13 in the tubular film 21 from being lifted upward so that it can be conveyed while maintaining a horizontal state. ing.

  The end seal device 30 seals and cuts the tubular film 21 in a direction orthogonal to the traveling direction, that is, in a transverse direction. The film part to be sealed / cut is a predetermined position between the front and back objects 13 to be packaged. Thereby, the head part of the cylindrical film 21 is isolate | separated from the subsequent by passing the end seal apparatus 30, and the package body 27 is manufactured.

  Hereinafter, the end seal device 30 will be described. The end seal device 30 of the present embodiment is of a so-called box motion type, and a pair of top sealers 31 and 32 arranged vertically with the tubular film 21 sandwiched therebetween make the seal surfaces 31a and 32a face each other. It moves along a predetermined trajectory while maintaining the state. That is, both the top sealers 31 and 32 move closer to each other from the reference position and sandwich the tubular film 21 from above and below, thereby pressurizing and heating the film portion in contact with the seal surfaces 31a and 32a with a predetermined pressure. . The top sealers 31 and 32 move forward along the moving direction of the tubular film 21 while maintaining the state in which the top sealers 31 and 32 approach each other and sandwich the tubular film 21 as described above. The moving speed at this time is equal to the moving speed of the tubular film 21. When the pair of top sealers 31 and 32 move by a predetermined distance, both the top sealers 31 and 32 move away from each other and move in the direction opposite to the moving direction of the tubular film 21 to reach the reference position.

  These upper and lower top sealers 31 and 32 are attached to an upper sealer mount 33 and a lower sealer mount 34, respectively. That is, the upper top sealer 31 is fixed to the lower surface of the upper sealer mount 33 and moves together with the upper sealer mount 33. The lower top sealer 32 is fixed to the upper surface of the lower sealer mount 34 and moves together with the lower sealer mount 34. The cam floor 36 is disposed on both side surfaces of the upper sealer mount 33 and the lower sealer mount 34 so as to protrude outward. The cam floor 36 is provided on a cam plate 37 attached so as to be rotatably supported by an inner surface of a machine frame 35 whose basic configuration is a substantially rectangular shape surrounding the cylindrical film 21. It coincides with the groove cam and revolves as described above according to the shape of the groove cam. The cam plate 37 is connected to one end of the rotating shaft 38. The other end of the rotating shaft 38 protrudes outside the machine casing 35 and is connected to a synchronous gear 39. The synchronous gears 39 connected to the upper and lower rotary shafts 38 mesh with each other and can rotate in synchronization with each other, and rotate by receiving the rotational force of the drive motor 40. Therefore, when the drive motor 40 is driven to rotate, each cam plate 37 rotates in a predetermined direction, and the upper and lower top sealers 31 and 32 revolve using the cam mechanism as described above. In addition, since the structure which carries out a turn using this cam mechanism is a conventionally well-known thing, the detailed description is abbreviate | omitted. Also, instead of using a cam in this way, a plurality of drive motors such as a drive motor for moving the top sealers 31 and 32 up and down and a drive motor for moving forward and backward are provided, and each of these drive motors is provided. The top sealers 31 and 32 can be revolved by operating at an appropriate timing.

  On the center line of the upper top sealer 31, a through hole 31b penetrating vertically is provided. And in the through-hole 31b provided in the upper side top sealer 31, the top cutter (cutter blade) 41 is arrange | positioned so that an up-down movement is possible. The top cutter 41 has a blade 41a at the lower end. The top cutter 41 receives a force from an air cylinder 42 that is a driving source attached to the upper surface of the upper sealer mount 33 and moves up and down relatively with respect to the lower top sealer 32. More specifically, the upper end of the top cutter 41 is fixed to the connecting plate 43 and linked to the air cylinder 42 via the connecting plate 43. And when the top cutter 41 comes to the lowest position, the blade part 41a will protrude below the sealing surface 31a.

  On the other hand, a narrow first concave groove 32 b is formed on the center line of the lower top sealer 32 at a position facing the top cutter 41. As a result, the air cylinder 42 is actuated at the timing when the tubular film 21 is sandwiched from above and below by the upper top sealer 31 and the lower top sealer 32, and the top cutter 41 is moved downward from the sealing surface 31a. The blade portion 41 a protruding downward enters the first concave groove 32 b provided in the lower top sealer 32. Thereby, the cylindrical film 21 is cut | disconnected by the horizontal direction along the blade part 41a.

  Further, the sealing surfaces 31a and 32a of the upper top sealer 31 and the lower top sealer 32 are provided with a wide sealing portion 32a ′ whose one end protrudes forward along the film transport direction, as shown in FIG. Provided. In FIG. 5, the seal surface 32a is drawn on the lower top sealer 32, but the seal surface 31a of the upper top sealer 31 has the same configuration (in a portion facing the wide seal portion 32a ′). A wide seal portion 31a ′ is provided (see FIG. 4)). A slit 31d was formed at a predetermined position in the wide seal portion 31b of the upper top sealer 31. The slit 31d is arranged in parallel with the axial direction of the upper top sealer 31, the lower end is seen through the seal surface 31a, and the upper end is connected to the through hole 31b. And in this slit 31d, the cutting cutter 44 is arrange | positioned so that an up-down movement is possible. The upper end of the cutting cutter 44 is fixed to the connecting plate 43. Thus, the cutting cutter 44 moves up and down relative to the upper top sealer 31 integrally with the top cutter 41 in conjunction with the operation of the air cylinder 42. When the cutting cutter 44 comes to the lowest position, the lower end blade portion 44a protrudes below the seal surface 31a.

  Further, a narrow second concave groove 32 c is formed at a position facing the cutting cutter 44 in the wide seal portion 32 a ′ of the lower top sealer 32. As a result, the air cylinder 42 is actuated at the timing when the tubular film 21 is sandwiched from above and below by the upper top sealer 31 and the lower top sealer 32 and heat-sealed, and the cutting cutter 44 moves downward, and the sealing surface 31a. The blade portion 44a that protrudes downward enters the second concave groove 32c provided in the lower top sealer 32. Thereby, as for the cylindrical film 21, the site | part corresponding to the blade part 44a is cut | disconnected. Moreover, since the slit 31d and the 2nd ditch | groove 32c exist around the site | part cut | disconnected by the blade part 44a of this cutting cutter 44, it becomes an unsealed area | region.

  Here, in the present embodiment, as shown in FIG. 4, the machine frame 35 is fixed on a movable table 50 that can move in the lateral direction with respect to the film conveyance direction of the tubular film 21, and moves together with the movable table 50. I am doing so. The moving table 50 has a female screw formed so as to penetrate in the left-right direction orthogonal to the conveying direction of the tubular film 21, and a screw shaft 52 having a male screw (screw screw) matching the female screw is mounted. Both ends of the screw shaft 52 protrude outward from the left and right side edges of the moving base 50. A pair of bearing members 51 are disposed outside both side edges of the movable table 50, and both ends of the screw shaft 52 are rotatably supported by the bearing members 51, respectively. Further, a handle 53 is linked to one end of the screw shaft 52, and when the handle 53 is rotated forward and backward, the screw shaft 52 is also rotated forward and backward. As the screw shaft 52 rotates forward and backward, the moving table 50 reciprocates in the lateral direction (left-right direction) orthogonal to the film transport direction.

  Thus, in this embodiment, since the machine casing 35 can be reciprocated in the lateral direction perpendicular to the conveying direction of the tubular film 21, the end seal device 30 (upper top sealer) is moved along with the movement of the machine casing 35. 31, the lower top sealer 32 and a mechanism for driving the lower top sealer 32 can be integrally moved in the lateral direction. Therefore, for example, when manufacturing a wide package 27 as shown in FIG. 5A, the wide seal portion 32 a ′ and the second concave groove 32 c are applied to the side edge of the tubular film 21, and the cutting cutter 44 is cut. By cutting from the side edge of the tubular film 21 toward the center, as shown in FIG. 6A, a cut 27c from the side edge toward the center is formed in the end seal portion 27a (wide seal portion 27a ′). The provided package 27 is manufactured. In FIG. 6A, reference numeral 27b denotes a center seal portion sealed with a center seal device.

  On the other hand, when manufacturing a narrow package using the same horizontal pillow packaging machine, the position of the center seal portion 27b is constant if the bag making machine does not move in the horizontal direction (the position is fixed). Therefore, as shown in FIG. 5 (a), when the center seal portion 27b is formed on the center line of the tubular film 21, the width becomes narrow as shown in FIG. 5 (b). Is in a state in which the positions of the left and right sides of the tubular film 21 are both on the center side. Therefore, in the end seal device (top sealer) set at the position shown in FIG. 5A, the wide seal portion 32a ′ (the cutting cutter 44) does not cover the tubular film 21 and forms a cut. I can't.

  Therefore, in the present embodiment, the handle 53 is rotated in a predetermined direction, and the machine casing 35 is moved in the lateral direction. As shown in FIG. 5B, the wide seal portion 32a ′ and the second concave groove 32c are formed into a cylindrical film. It can be cut from the side edge of the tubular film 21 toward the center by the cutting cutter 44. Accordingly, as shown in FIG. 6 (b), even for the narrow package body 27, the package body is provided with a cut 27c from the side edge toward the center in the end seal portion 27a (wide seal portion 27a '). 27 is manufactured.

  Then, by appropriately adjusting the movement distance in the left-right direction, various types of packaging bodies having different widths can be manufactured using a horizontal pillow packaging machine having the same configuration without replacing parts.

  In the above-described embodiment, an example in which the end seal device 30 is applied to a so-called box motion type has been described. However, the present invention is not limited to this, and for example, a rotary end seal device may be used. . As an example of the horizontal pillow packaging machine provided with this rotary type end seal device, FIGS. 7 to 9 are other embodiments of the present invention.

  As shown in the figure, the end seal device 60 of this embodiment has an upper top sealer 61 and a lower top sealer 62 arranged vertically with the tubular film 21 interposed therebetween. Both the top sealers 61 and 62 are fixed to rotating shafts 63 and 63 that are both arranged in parallel, and rotate around the rotating shaft 63. That is, the rotating shaft 63 is rotatably supported by the machine casing 68, and the synchronous gear 69 is connected to both ends thereof. Synchronous gears 69 connected to the upper and lower rotating shafts 63 mesh with each other, can rotate in synchronization, and rotate by receiving the rotational force of the drive motor 70. Therefore, when the drive motor 70 is driven to rotate, the upper and lower rotary shafts 63 are rotated in synchronization with each other, and the seal surfaces 61 a and 62 a of the upper top sealer 61 and the lower top sealer 62 are both the top sealers 61 and 62. The cylindrical film 21 is sandwiched from above and below and heated and pressurized once for each rotation. Since such a rotary sealing mechanism is conventionally known, detailed description thereof is omitted.

  An elongated groove is formed on the center line of the seal surface 61a of the upper top sealer 61, and a cutter blade 64 is inserted and disposed in the groove. A receiving blade 65 is disposed on the center line of the seal surface 62 a of the lower top sealer 62. Each time the upper and lower top sealers 61 and 62 make one rotation, the cutter blade 64 and the receiving blade 65 are brought into contact with each other with a predetermined pressure, and the film portion of the sandwiched tubular film 21 is cut. The entire length of the cutter blade 64 and the receiving blade 65 is sufficiently longer than the lateral width of the tubular film 21. By cutting the film portion, the front portion of the tubular film 21 is divided, and the package 27 is manufactured. Is done.

  The end seal device 60 is also provided with wide seal portions 61 a ′ and 62 a ′ in which the seal surfaces on the one end sides of the upper top sealer 61 and the lower top sealer 62 are wide, as in the end seal device 30 described above. Yes. A cutting cutter 66 is disposed at the wide seal portion 61 a ′ of the upper top sealer 61, and a cutting blade 67 is provided at the wide seal portion 62 a ′ of the lower top sealer 62. The cutting cutter 66 and the cutting receiving blade 67 are short in total length, but each time the upper and lower top sealers 61 and 62 rotate once, the cutting cutter 66 and the cutting receiving blade 67 are at a predetermined pressure. The film part of the cylindrical film 21 which touched and was pinched is cut | disconnected. Thus, a cut is formed from the side edge of the end seal portion in the package 27 toward the center by a predetermined distance.

  Also in this embodiment, both the top sealers 61 and 62 and the machine frame 68 that supports the drive mechanism are mounted on the moving table 50, and the handle 53 is moved forward and backward to move with the screw shaft 52. The moving base 50 reciprocates in the horizontal direction by a screw mechanism between the base 50 and the female screw. Therefore, the horizontal position of the machine frame 68 and the upper and lower top sealers 61, 62 can be changed and adjusted. Even for packaging bodies having different widths, a horizontal pillow packaging machine having the same configuration can be obtained without replacing parts. Can be used. In addition, since another structure and an effect are the same as that of embodiment mentioned above, the same code | symbol is attached | subjected to a corresponding member and the detailed description is abbreviate | omitted.

  Furthermore, in each embodiment mentioned above, the case where all are applied to the pillow packaging machine is shown, but the present invention is not limited to this, and can be applied to a four-sided sealing machine and other various packaging machines.

It is a figure which shows an example of the package body manufactured with the conventional apparatus. 1 is a front view showing a preferred embodiment of a packaging machine (horizontal pillow packaging machine) according to the present invention. It is an enlarged front view which shows an end seal apparatus and its periphery. It is a side view which shows an end seal apparatus. It is a top view which shows the sealing surface and cylindrical film of the top sealer of an end seal device, in order to demonstrate the effect of this embodiment. It is a figure which shows an example of the package body manufactured by this embodiment. It is a front view which shows other suitable embodiment of the packaging machine (horizontal pillow packaging machine) which concerns on this invention. It is an enlarged front view which shows an end seal apparatus and its periphery. It is a side view which shows an end seal apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Horizontal pillow packaging machine 11 Packaging machine main body 12 Film supply apparatus 13 Packaged article 14 Packaged article conveyance supply apparatus 21 Cylindrical film 24 Center seal apparatus 30 End seal apparatus 31 Upper top sealer 32 Lower top sealer

Claims (4)

An end seal device that seals and cuts a packaging film that encloses an article to be packaged in the lateral direction of the packaging film,
The sealing surface of the top sealer that is arranged up and down across the packaging film is formed so that one end side is wide,
At least one of the top sealers arranged above and below is provided with a cutter for cutting a side edge of the packaging film in the wide seal portion formed wide,
The top sealer arranged above and below is provided so as to be movable in the lateral direction of the packaging film. The top sealers disposed above and below are rotatably supported with respect to side walls disposed on both outer sides in the traveling direction of the packaging film,
The end seal device according to claim 1, wherein a movable table that supports the side wall is arranged so as to be movable in the lateral direction of the traveling direction.   The end seal device according to claim 1, wherein the packaging film is a stretched film.   A packaging machine comprising the end seal device according to any one of claims 1 to 3.

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