JP5219432B2 - End seal device - Google Patents

Description

The present invention relates to Rue Ndoshiru device provided in horizontal automatic 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 one form of the above end seal device, a pair of top sealers (with built-in cutter blades) arranged one above the other with a tubular film sandwiched between them and the seal surface of the top sealer are kept facing each other. However, there is a drive mechanism that moves the top sealer along a predetermined locus. Then, the upper and lower top sealers move forward together with the tubular film by a certain amount in a state where the predetermined position of the tubular film is sandwiched from above and below. Thereby, while the site | part between which the cylindrical film was pinched is heat-sealed, it is cut. This type of end seal device is also referred to as a box motion type.

  On the other hand, there are a wide variety of forms of the package, one of which is a fold line (gazet) folded inward on the side of the film near the end seal portion 1 as shown in FIG. There is a package 3 with a gusset in which 2 is formed. In order to manufacture this package with a gusset, usually, the pillow packaging process is performed using the above-described pillow packaging machine, and as shown in FIG. 2, before (or at the same time) the end seal of the final process. The gusset 2 is formed by pushing both side surfaces of the tubular film 21 near the end-sealed part inwardly with the gusset claw 71.

  Here, the gusset claw 71 is driven to reciprocate inward in synchronism with the movement of the top sealers 33a and 33b of the end seal device by a driving force transmission means such as a link mechanism. The top sealers 33a and 33b are taken out from the rotating shafts that are driven to rotate.

That is, a cam for taking out a driving force therefrom is provided at the end of the rotary shaft of the top sealers 33a and 33b, and a swing lever for converting the rotary motion into a reciprocating swing rotary motion is engaged with the cam. Then, the output end of the swing lever and the gusset claw 71 are mechanically linked by an appropriate link mechanism, and the reciprocating swing motion of the swing lever is converted to a linear reciprocating motion and transmitted to the gusset claw 71. I am doing so. Note that such a gusset forming apparatus is disclosed in, for example, Patent Document 1 and the like.
JP 2001-114203 A

  However, the conventional apparatus described above has the following problems. In other words, the pillow wrapping machine is designed to perform packaging processing on various types of packages with different sizes such as height, and forms or forms a gusset 2 according to the type of package. I do not. For example, the gusset 2 is not formed when the height of the package is low. In order to cope with two types of packaging bodies that form the gusset 2 and the packaging bodies that do not form in this way with one pillow packaging machine, conventionally, the gusset claw 71 has been detachably attached to the driving force transmission means. It was. As a result, the gusset claw 71 is removed from the driving force transmitting means when packaging an object to be packaged that does not require the gusset 2.

  However, even when the gusset claw 71 is removed as described above, the link mechanism that drives the gusset claw 71 is continuously operated during the pillow packaging operation regardless of whether or not the gusset 2 is formed. It will be. For this reason, the sliding parts of the link mechanism are worn unnecessarily, and the wear of the link mechanism part progresses faster than the actual working time of the gusset molding, causing a problem in terms of durability. Further, along with the operation of the link mechanism portion, the member to which the gusset claw 71 is attached performs a linear reciprocating motion, and a large sound is generated from the driving force transmitting means along with the motion. Such sound is not preferable because it becomes noise and causes a decrease in the environment in the production factory.

  Furthermore, the dimensions and shapes of the packaging body are various and diverse, and the amount of folding of the gusset also varies in the packaging body forming the gusset. Since the movement trajectory of the gusset claw is uniquely determined by a drive mechanism such as a cam and a link mechanism, in order to form a jet with different dimensions, it is necessary to redesign the drive mechanism accordingly. It ’s cumbersome.

The present invention can easily stop the driving force applied to the gusset pawl according to the necessity of forming the gusset, thereby improving the durability of the driving mechanism (power transmission means) and noise when the gusset is not formed. reduction can be achieved, and also aims to provide a Rue Ndoshiru device can easily correspond to the design change of the gusset forming the subject of the package.

In order to achieve the above-described object, the end seal device according to the present invention includes (1) a predetermined locus of a predetermined portion of a tubular film in which an article to be packaged is contained at a predetermined interval and conveyed in a horizontal direction. An end seal device for a horizontal automatic packaging machine that is sandwiched between a pair of upper and lower top sealers that revolve in a horizontal direction, and the top sealer is held in a predetermined state while maintaining a state in which the seal surfaces of the top sealers face each other. A drive mechanism that revolves along the trajectory, and moves along the transport direction of the tubular film following the movement of the top sealer in the front-rear direction. A gusset that forms both sides of the tubular film inward with a gusset claw and folds the sides of the tubular film to form a gusset. Comprising a forming device, wherein the gusset forming apparatus, a drive source for reciprocating toward the gusset pawl in said side constitutes a further drive motor is a drive source for revolve the top sealer, the gazette pawl Are respectively provided on both sides of the tubular film so as to be movable up and down, the drive motors are provided on the gusset claws, and the drive motors rotate forward and backward within a predetermined angle range, respectively. The output shaft of the motor and the gusset claw are linked through a motion conversion mechanism that converts forward / reverse rotational motion into reciprocating linear motion, and the motion conversion mechanism performs forward / reverse rotational motion in cooperation with the output shaft. And a guide plate that is linked to the gusset claw and moves in a reciprocating linear motion in the horizontal direction integrally with the gusset claw. A pin attached to the tip of the swing lever is attached to a guide hole extending vertically, and the relative height position of the pin in the guide hole is changed, so that the drive motor is moved up and down without moving up and down. The nail can be moved up and down .

  Since the drive motor for moving the gusset claw is configured separately from the drive source of the top sealer, the gusset forming device can be operated independently of the revolving movement of the top sealer. Therefore, if you want to manufacture a package without gusset formation, stop the drive motor while the gusset claw is retracted to the retracted position on the side of the tubular film, and this can be done without removing the gusset claw. The operation of the mechanism for easily reciprocating the gusset claw can be stopped while preventing the work from being hindered. For this reason, it is possible to prevent the members constituting the drive mechanism from being wasted. Of course, the gusset nail may be removed.

  (2) The gusset claws are provided on both sides of the tubular film, the drive motor is provided for each gusset claw, and each drive motor rotates forward and backward within a predetermined angle range. The output shaft of the drive motor and the gusset claw may be linked via a motion conversion mechanism that converts forward / reverse rotational motion into reciprocating linear motion.

(3) The drive motor may be a motor capable of adjusting a rotation angle range such as a servo motor.
Since the device that applies the gusset to the package can be operated independently by the servo motor, it is not necessary to replace the gusset member when changing the product, and the operation timing and distance of the gusset member are electrically controlled to the product being packaged. It can be operated properly together.

(4) The drive mechanism is configured such that a mechanism for moving the top sealer up and down and a drive mechanism for moving the top sealer forward and backward operate based on outputs of different drive motors. be able to.

  In this way, the end seal device can make the upper and lower top sealers engage with the packaging film at the same time regardless of the length of the cut dimensions. If the temperature is set to an appropriate temperature that can be sealed, there is no need to change the set temperature of the top sealer due to a product change or the like, and the packaging process can be stably performed with simple control. In addition, even if the heater setting is electrically changed, it takes some time for the actual top sealer surface temperature to change to an appropriate temperature based on the setting. Doing puts a time load on the packaging process and the production process. However, according to the present invention, once an appropriate sealer temperature for the film is set, there is no need to change the temperature even if there is a subsequent product change (change in cut dimensions), resulting in smooth packaging, Production can be carried out.

(5) The drive mechanism includes a mechanism for vertically moving the upper top sealer, a mechanism for vertically moving the lower top sealer, and a drive mechanism for moving the top sealer forward and backward. Also, it can be configured to operate on the basis of power from separate drive motors.

  Since the driving sources of the upper and lower top sealers are separated, both the top sealers can move arbitrarily up and down regardless of the positions of the other side. Therefore, in the type that can adjust the vertical movement distance of the top sealer according to the height dimension of the packaged item, the movement amount of the vertical top sealer can be appropriately controlled, and the distance longer than necessary can be controlled. There will be no shortage of movement or travel distance. Furthermore, when the upper and lower top sealers are moved up and down together, the sealing surface of the lower top sealer can be positioned in the vicinity of the conveying surface, and the end seal device (particularly the top sealer portion) can be easily cleaned. .

  The drive mechanism of the top sealer includes, for example, a ball screw that rotates forward and backward according to the forward and reverse rotation of the drive motor, and the sealer mounting base for mounting the top sealer is configured to move up and down with the forward and reverse rotation of the ball screw. Good. In this way, the vertical movement of the upper and lower top sealers can be accurately controlled.

  The uppermost movement position of the upper top sealer during the packaging process is set according to the height of the packaged object, and the lowermost movement position of the lower top sealer during the packaging process is set as the packaged object. Regardless of the height, it may be set at a predetermined position below the conveying surface of the packaged object in the end seal device. If it does in this way, the up-and-down movement amount of the upper top sealer can be set to a necessary and sufficient distance in accordance with the height of the package. Further, by making the amount of movement of the lower top sealer constant regardless of the height of the packaged object, the moving distance is not increased more than necessary, and the load on the motor is reduced. Further, the lower predetermined position on the conveyance surface is limited to a position below the conveyance surface by a sufficient distance so that adjacent end portions of the front and rear conveyors are close to each other as illustrated in FIGS. In other words, the sealing surface of the top sealer can be positioned substantially the same as or slightly below the conveying surface. If it does in this way, the movement distance of a lower top sealer can be shortened as much as possible, and the load of a motor can be controlled.

  In the cleaning mode, the upper top sealer and the lower top sealer may be controlled so as to move upward together, and may be configured to stop at a predetermined upper predetermined position. A general upper and lower top sealer opens and closes when one moves up and the other moves down. In the present invention, since the drive sources of the upper and lower top sealers are separated, both the top sealers can be moved in the same direction. Therefore, by moving both the top sealers up together, the sealing surface of the lower top sealer rises and is positioned in the vicinity of the transport surface, and the upper top sealer at that time is rising, so the space between both top sealers A space is formed. Therefore, the top sealer can be easily cleaned using the space.

  The present invention can easily stop the driving force on the gusset claw according to the necessity of forming the gusset, thereby improving the durability of the driving force transmitting means and reducing the noise when the gusset is not formed. Can measure. In addition, when the rotation angle range of the drive motor can be adjusted, it is possible to easily cope with a design change of the package body on which the gusset is to be formed.

  FIG. 3 to FIG. 9 show an example of an end seal device to which the gusset forming device of the present invention is mounted, and thus a pillow packaging machine. The pillow wrapping machine 10 of this embodiment is disposed on the upstream side of the wrapping machine main body 11, the film supply device 12 that continuously supplies a belt-like wrapping film to the wrapping machine main body 11, and the packaging machine main body 11. , And a packaged article transport and supply device 14 that supplies the packaged article 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. Although not shown, 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. Then, it is guided to the packaging machine body 11 through a predetermined path. Of course, it is not always necessary to link the driving motor to the original 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 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, 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. The bag is placed on the film 21. 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.

  The end seal device 30 includes top sealers 33a and 33b that are vertically opposed to each other with the tubular film 21 interposed therebetween, and maintains a state in which the seal surfaces 33a 'and 33b' of the top sealers 33a and 33b face each other. Each revolves around a predetermined trajectory.

  Specifically, as shown in FIG. 3 to FIG. 7, the machine frame 35 is disposed so as to surround the transport path of the tubular film 21 and to move forward and backward along the transport direction of the tubular film 21. Below the machine frame 35, two first guide rails 34 are installed along the traveling direction of the tubular film 21. A slider 38 corresponding to the first guide rail 34 is connected to a predetermined position on the bottom surface 35 c on the outer peripheral side of the machine frame 35. Thereby, as the slider 38 moves forward and backward along the first guide rail 34, the machine casing 35 also moves forward and backward stably.

  The driving source for the forward / reverse movement uses a flow direction moving motor 60. That is, the ball screw 64 for moving in the flow direction arranged along the traveling direction of the tubular film 21 is inserted into the female screw portion provided on the connecting plate 65 attached to the substantially central portion of the bottom surface 35 c of the machine frame 35. Then, the timing belt 61 is wound around the stepped pulley 62 attached to the output shaft of the flow direction moving motor 60 and the stepped pulley 63 attached to one end of the flow direction moving ball screw 64. As a result, by rotating the flow direction moving motor 60 forward and backward, the top sealers 33a and 33b attached to the connecting plate 65 and the machine frame 35 can be moved forward and backward. And the moving speed at that time can be changed according to the rotational speed of the motor 60 for flow direction movement. That is, the preliminary sealers 33a and 33b can be moved forward at the same speed as the transport speed of the tubular film 21, or can be moved forward at a speed faster or slower than the transport speed. In the present embodiment, the flow direction moving motor 60 uses a motor capable of controlling the rotational speed, such as a servo motor.

  On the other hand, four ball screws extending in the vertical direction were provided so as to cross between the top surface 35a and the bottom surface 35c of the machine casing 35. The ball screw includes a pair of first ball screws 40 disposed on the inner side and a pair of second ball screws 41 disposed on the outer side. The first and second ball screws 40 and 41 are supported by bearings on the top surface 35a and the bottom surface 35c of the machine casing 35 at both ends thereof.

  A thin rod-like rotary shaft 51 at the upper end of the pair of first ball screws 40 is protruded above the top surface 35 a of the machine frame 35, and a stepped pulley 52 is attached to the tip of the rotary shaft 51. The timing belt 53 is wound around. The upper sealer opening / closing motor 57 is linked to the lower end of the first ball screw 40. The upper sealer opening / closing motor 57 uses a motor capable of controlling the rotational speed, such as a servo motor.

  Accordingly, when the upper sealer opening / closing motor 57 is rotated forward and backward, the pair of first ball screws 40 are also rotated forward and backward in the same direction in synchronization. The upper sealer mount 45 is linked to the pair of first ball screws 40. That is, the cylindrical female screw portion 42 is inserted and disposed in the through holes provided at both ends of the band plate-like upper sealer mounting base 45, and the female screw portion 42 is linked to the first ball screw 40. Then, the upper top sealer 33 a is attached to the lower surface of the upper sealer mounting base 45. Therefore, when the upper opening / closing motor 57 is rotated forward and backward, the rotation is transmitted to the first ball screw 40, and the female screw portion 42 (upper sealer mounting base 45) and thus the upper top sealer 33a move up and down.

  Similarly, a thin rod-shaped rotary shaft 56 at the upper end of the pair of second ball screws 41 protrudes above the top surface 35a of the machine frame 35, and a stepped pulley 54 is attached to the tip of the rotary shaft 56, and both stepped pulleys A timing belt 55 is passed between 54. Then, a lower sealer opening / closing motor 58 is linked to the lower end of one second ball screw 41. The lower sealer opening / closing motor 58 uses a motor capable of controlling the rotational speed, such as a servo motor.

  Accordingly, when the lower sealer opening / closing motor 58 is rotated forward and backward, the pair of second ball screws 41 are also rotated forward and backward in the same direction in synchronization. The lower sealer mounting base 46 is linked to the pair of second ball screws 41. In other words, the cylindrical female screw portion 43 is inserted and disposed in the through holes provided at both ends of the lower sealer mounting base 46 in the band plate shape, and the female screw portion 43 is linked to the second ball screw 41. Then, the lower top sealer 33 b is attached to the upper surface of the lower sealer mounting base 46. Therefore, when the lower opening / closing motor 58 is rotated forward and backward, the rotation is transmitted to the second ball screw 41, and the female screw portion 43 (upper sealer mounting base 46) and thus the lower top sealer 33b move up and down.

  As shown in FIG. 7, the lower sealer opening / closing motor 58 and the second ball screw 41 are linked by meshing gears 67 and 68 attached thereto. Although not shown in the drawings, the linkage between the upper sealer opening / closing motor 57 and the first ball screw 40 has the same configuration.

  Further, a guide rail 95 is provided on the back surface 35d of the machine casing 35 so as to extend in the vertical direction. The sliders 96 and 97 are linked to the guide rail 95 so as to be movable in the axial direction. The slider 95 is connected to the upper sealer mount 45 and the slider 97 is connected to the lower sealer mount 46. Accordingly, rolls are also prevented, and both the mounting bases 45 and 46 and thus the upper and lower top sealers 33a and 33b can be stably moved up and down with respect to the machine frame 35.

  As shown in FIG. 4, a cylinder 59 is provided on the upper surface of the upper sealer mount 45, and the cutter blade built in the upper top sealer 33 a is moved up and down by this cylinder 59. . Such a configuration is the same as the conventional one.

  As described above, the top sealers 33a, 33b (the horizontal movement) and the drive sources for the vertical movement (vertical movement) are used as separate independent drive motors. The machine frame 35) can be controlled to move back and forth and up and down at any timing, and the trajectory of the revolving movement of the top sealers 33a and 33b can be easily set and changed.

  As a result, the standby positions in the front-rear direction of the upper and lower top sealers 33a, 33b during the packaging process are set to the upstream fixed positions regardless of the length in the front-rear direction and the cut dimensions of the article 13 to be packaged. Can be. Then, when the film part to be end-sealed of the packaging film reaches between the top sealers 33a and 33b that are temporarily stopped at the standby position, the upper and lower top sealers 33a and 33b move toward each other. The cylindrical film 21 is sandwiched from above and below. At this time, when at least the top sealers 33a and 33b come into contact with the tubular film 21, the top sealers 33a and 33b are controlled to move forward. Of course, by providing the control of each of the drive motors 60, 57 and 58 with the function of the invention disclosed in Patent Document 1, the same effects can be obtained.

  Further, a driving source (upper sealer opening / closing motor 57) for moving the upper top sealer 33a up and down, and a driving source (lower side sealer opening / closing motor 58) for moving the lower top sealer 33b up and down are provided. Since they are formed by separate motors, the upper and lower top sealers 33a and 33b can be moved up and down independently. Thereby, it is possible to set the movement distance of each top sealer to an optimum one for the articles to be packaged (packaging bodies) having different heights without worrying about the movement distance of the other party.

  Accordingly, for example, the uppermost position of the upper top sealer 33a is set to a position that takes a certain margin from the upper surface position of the packaged object, or the lower top sealer is adjusted to the height of the packaged object. The lowermost movement position of 33b can be set to a predetermined position below the conveying surfaces of both conveyors 23 and 26, regardless of the height of the articles to be packaged. Therefore, it does not move over a longer distance than necessary, and the load on the drive motor can be reduced. Moreover, since the position where the upper and lower top sealers 33a and 33b mesh can be arbitrarily and easily changed, the position can be set to an arbitrary position in the height direction of the package.

  Furthermore, the upper top sealer 33a and the lower top sealer 33b can both be moved upward. In this way, the space between the top sealers 33a and 33b can be secured by moving the upper top sealer 33a upward, and the adjacent end portions of the conveyors 33 and 36 can be moved by moving the lower top sealer 33b upward. And the sealing surface of the lower top sealer 33b can be positioned on the conveying surface of the conveyors 33, 36 or at a higher position. Therefore, the working space for cleaning the top sealers 33a and 33b can be widened, and the sealing surface of the lower top sealer 33b protrudes, so that the cleaning work can be easily performed.

  Further, in the present embodiment, an upper sealer opening / closing motor 57 and a lower sealer opening / closing motor 58 are provided as drive motors for moving the top sealers 33a, 33b up and down, and driving for moving the top sealers 33a, 33b back and forth. A motor 60 for moving the flow direction is separately provided as a motor. Thereby, the movement trajectory of the top sealers 33a and 33b can be set freely.

  In other words, for example, when the length of the package is changed and the cut dimension (cut length) for the tubular film is changed, in order to make the number of rotations of the packaging machine (the number manufactured per unit time) the same. When the cut length is long, the traveling speed of the tubular film is increased, and conversely, when the cut length is short, the traveling speed of the tubular film is decreased. The upper and lower top sealers 33a and 33b need to move forward at the same speed as the tubular film 21 while sandwiching the tubular film 21 from above and below. Therefore, in the conventional box motion, the sealing time is shortened when the forward movement speed (circumferential speed) is fast, and the sealing time is long when the forward movement speed (circumferential speed) is slow. Therefore, in order to obtain an appropriate sealing result, the temperature of the top sealer had to be changed due to a change in speed (change in cut length due to product change).

  On the other hand, according to this embodiment, when packaging different products, even if the cut length changes and the moving speed (circumferential speed) in the traveling direction of the tubular film changes, independent servo motor control The meshing time between the top sealers 33a and 33b can be made constant. Therefore, if it is the same film, it can respond even if it does not change sealing temperature by always adjusting to an appropriate sealing time.

  That is, in this embodiment, even if the moving speed of the tubular film changes, the moving time in the forward direction of the top sealer itself and the opening / closing timing of the upper and lower top sealers are arbitrarily set by an independent servo motor. Since it can be controlled, when the peripheral speed is fast, in order to obtain an appropriate sealing time, the upper and lower top sealers have a cylindrical film sandwiched between them to increase the sliding distance in the traveling direction. Control. On the other hand, when the peripheral speed is low, the sliding distance in the traveling direction is shortened when the upper and lower top sealers sandwich and seal the cylindrical film. By controlling in this way, the time for which the top sealer is engaged with the tubular film is the same in either case, so that the top sealer is once welded and sealed at a suitable temperature. Once set, there is no need to change the set temperature of the top sealer by changing the product.

  In addition, even if the heater setting is electrically changed, it takes some time for the actual top sealer surface temperature to change to an appropriate temperature based on the setting. Doing puts a time load on the packaging process and the production process. However, in this embodiment, once an appropriate sealer temperature for the film is set, it is not necessary to change the temperature even when the product is changed thereafter (peripheral speed change due to change in cut length), resulting in smooth packaging. The production can be carried out.

  In this embodiment, the following gusset forming device 70 is provided for the end seal device 30 having the above-described configuration. As shown in FIG. 2, the gusset forming device 70 includes gusset claws 71 located on both sides of the side surface of the tubular film 21 and a drive mechanism (described later) that moves the gusset claws 71.

  The gusset claw 71 is connected to both the top sealers 33a and 33b, and moves forward and backward integrally while maintaining a desired position in the height direction. And while the part in which the to-be-packaged goods 13 are accommodated passes among the cylindrical films 21, it moves outside from the position of illustration, and the front-end | tip 71a is further outside the side surface of the cylindrical film 21. It is located at the standby position.

  And, as shown in the figure, when the relative positions are such that the articles to be packaged 13 exist before and after the top sealers 33a and 33b, respectively, and only the tubular film 21 exists between the top sealers 33a and 33b. Each gusset claw 71 moves toward the inner side (tubular film side). And the front-end | tip 71a contacts the side surface of the cylindrical film 21, and pushes it inward, The gusset (fold) 2 as shown in the figure is formed in the side surface of the cylindrical film 21. FIG.

  As described above, the gusset claw 71 can be pushed in such a manner that the opposed distal ends 71a are pushed inward on both side surfaces of the tubular film 21, but on the lower surface of the base end opposite to the distal end 71a, 75 is attached. The slider 75 is linked to the guide rail 76 and can linearly reciprocate along the guide rail 76. The guide rail 76 is coupled to the machine casing 35 of the end seal device 30 by a predetermined coupling mechanism, and maintains a posture extending in parallel with the top sealers 33a and 33b. As a result, the guide rail 76 and the gusset claw 71 are stably reciprocated along the axial direction of the top sealers 33a and 33b while maintaining a horizontal posture (see FIG. 2).

  The connecting mechanism for connecting the guide rail 76 to the machine frame 35 is as follows. That is, the strip-shaped connecting plate 80 is fixed to the machine casing 35 of the end seal device 30. A guide rail 81 is installed on the inner surface side of the connecting plate 80 so as to extend in the vertical direction, and a slider 82 is mounted on the guide rail 81 so as to be movable up and down. Then, one surface (vertical surface side) 83a of the L-shaped plate 83 is fixed to the slider 82, and a guide rail 76 is attached to the other surface (horizontal surface side) 83b of the L-shaped plate 83. Thereby, the gusset claw 71 is connected to the machine frame 35 via the slider 75, the guide rail 76, the L-shaped plate 83, the slider 82, the guide rail 81, and the connecting plate 80.

  Furthermore, the L-shaped plate 83 is provided with a female screw portion 84 at a predetermined position on the other side (horizontal plane) 83b. Further, support plates 85 are attached to predetermined positions on the inner surface side of the connection plate 80, and both ends of the screw screw shaft 86 are rotatably supported by the support plate 85. Then, the female screw portion 84 is linked to a screw portion 86 a provided at an intermediate portion of the screw screw shaft 86. Further, a first bevel gear 87 is attached to the lower end of the screw screw shaft 86, and a second bevel gear 88 that meshes with the first bevel gear 87 is attached to the same rotating shaft 89. The rotary shaft 89 is linked to a height adjusting drive motor 90 that can rotate forward and backward.

  As a result, when the height adjusting drive motor 90 rotates forward and backward, the rotational force is transmitted from the rotary shaft 89 to both the bevel gears 88 and 87 to the screw screw 88, and the female screw portion 84 (L-shaped plate 83) is moved up and down. Since the moving force works, the gusset claw 71 can be moved to an arbitrary height and the height position can be maintained. Such up-and-down movement is guided by the slider 82 and the guide rail 81 and is performed stably. Therefore, for example, even if the height position where the top sealers 33a and 33b are engaged with each other is changed due to a change in the height of the product, the gusset is only rotated by a predetermined amount in the predetermined direction. The claw 71 can be easily set at an appropriate height position.

  The drive means for reciprocating linearly moving the gusset claw 71 inward and outward is a drive source for the end seal device 30 as a drive source (flow direction moving motor 60, upper sealer opening / closing motor 57, lower sealer opening / closing motor 58). Further, another gusset drive motor 72 was used. This gusset drive motor 72 rotates forward and backward, and is realized by a servo motor or the like. Further, separate gusset drive motors 72 are provided for the left and right gusset claws 71, respectively.

  Then, one end of the swing lever 73 is connected to the output shaft of each gusset drive motor 72, and a pin 73 a is attached to the other end of the swing lever 73. On the other hand, a guide plate 74 extending in the vertical direction is attached to the side surface of the slider 75 to which the gusset claw 71 is attached, and the pin 73a is aligned with an elongated guide hole 74a formed in the guide plate 74.

  As a result, the swing lever 73 (pin 73a) and the guide plate 74 (guide hole 74a) constitute a mechanism for converting forward / reverse rotational motion into reciprocating linear motion. Therefore, when the gusset drive motor 72 rotates forward and backward, the swing lever 73 rotates forward and backward within a predetermined angle range with the lower end as a rotation center, and the pin 73a also reciprocates on a predetermined arc. Then, in the guide plate 74 having the guide hole 74a with which the pin 73a matches, the urging force in the vertical direction of the pin 73a is absorbed by the pin 73a moving up and down in the guide hole 74a, and the horizontal direction of the pin 73a is absorbed. Receiving urging force and reciprocating horizontally. As a result, the slider 75 and the gusset claw 71 connected to the guide plate 74 reciprocate linearly in the horizontal direction, and the movement is stably performed by the slider 75 and the guide rail 76.

  Further, since the position of the tip 71a of the gusset claw 71 is determined by the horizontal position of the pin 73a, if the angle range for forward / reverse rotation of the gusset drive motor 72 is increased, the moving distance of the gusset claw 71 also becomes longer. If the angle range is reduced, the moving distance is also shortened. Furthermore, by appropriately changing the stop position on the forward rotation side and the stop position on the reverse rotation side, the stop position when the gusset claw 71 moves forward and pushes the tubular film 21 inward can be changed. It can be easily adjusted to change the amount (distance) or to change the position where the gusset claw 71 moves backward and stops.

  According to the present embodiment, the height adjusting drive motor 90 is appropriately rotated, and the height position of the gusset claw 71 is set to a position where the top sealers 33a and 33b are engaged with each other. When the pillow wrapping machine is operated, the gusset drive motor 72 is reversely rotated to a predetermined angle to move the gusset claw 71 backward and temporarily stop at the reference position. At this time, since the tip 71a of the gusset claw is in a state of being retracted outside the both side surfaces of the tubular film 21, the tubular film 21 that encloses the article to be packaged 13 proceeds as it is. By setting the reference position to a position that matches the width dimension of the tubular film 21 (a position where the tip 71a of the gusset claw 71 is not in contact with the side surface of the tubular film 21), the gusset claw 71 is retracted. The moving distance can be minimized, and the load on the gusset drive motor 72 can be suppressed as much as possible, and high-speed processing can be supported.

  Then, the cylindrical film 21 moves forward, the package 13 is present before and after the top sealers 33a and 33b, and only the cylindrical film 21 exists between the top sealers 33a and 33b. If it becomes relationship, the drive motor 72 for gussets will rotate forward, and each gusset nail | claw 71 will move toward inner side (tubular film side). And the front-end | tip 71a contacts the side surface of the cylindrical film 21, and pushes it inward, The gusset (fold) 2 as shown in the figure is formed in the side surface of the cylindrical film 21. FIG. This pushing amount is controlled by the rotation angle when the gusset drive motor 72 rotates forward.

  Further, when the gusset drive motor 72 rotates forward to a predetermined angle and then temporarily stops, the gusset claw 71 holds the position while the tubular film 21 is pushed in. The top sealers 33a and 33b are moved closer to each other by the drive of the upper sealer opening / closing motor 57 and the lower sealer opening / closing motor 58 while being pushed in, and the predetermined position of the tubular film 21 is sandwiched and sealed.・ Cut it. At this time, the top sealers 33a and 33b move along the transport direction of the tubular film 21 by driving the flow direction moving motor 60, but the gusset claw 71 is also connected to the machine frame 35 of the end seal device 30. It moves integrally in the conveyance direction of the tubular film 21.

  When the gusset drive motor 72 starts reverse rotation at a predetermined timing, the gusset claw 71 moves backward. Further, the upper sealer opening / closing motor 57 and the lower sealer opening / closing motor 58 also rotate in a predetermined direction, so that the top sealers 33a and 33b are separated from each other. Thereby, the package in which the gusset as shown in FIG. 1 was formed is manufactured.

  In this embodiment, the drive source of the gusset claw 71 is set separately for the end seal device 30, so that the gusset claw 71 can be moved back and forth toward the tubular film 21 at an arbitrary timing, or its moving distance (forward・ Reverse temporary stop position) can be controlled freely. Therefore, it is not necessary to replace the gusset member when changing the product, and the operation timing and operation distance of the gusset member can be appropriately operated according to the product being packaged by electrical control. It is efficient to change the gusset control at the same time when the product change to be packaged is recognized by the control unit of the pillow packaging machine. The operation of each drive motor is controlled according to a command from a control device (not shown) such as forward / reverse rotation, stop, and rotation speed.

  In the present embodiment, as motors for revolving the top sealers 33a and 33b along a predetermined locus, a flow direction moving motor 60 for moving the top sealers 33a and 33b forward and backward, and the upper and lower top sealers 33a and 33b. Using the upper sealer opening / closing motor 57 and the lower sealer opening / closing motor 58 for moving the top sealers 33a and 33b along an arbitrary path, the gusset forming device is mounted on the end seal device 30 that moves the top sealers 33a and 33b in an arbitrary locus. Although shown, the end seal device to which the gusset forming device is attached is not limited to that of the present embodiment. For example, a drive motor for moving the top sealers 33a and 33b up and down (the top sealers 33a and 33b are moved up and down based on the output of one drive motor) and a top sealers 33a and 33b for moving back and forth. An end seal device that includes a drive motor and revolves the top sealer along an arbitrary trajectory may be used. Further, as in the end seal device disclosed in Patent Document 1 or the like, the output of one drive motor may be used. You may use for what controls the revolution movement of the top sealers 33a and 33b based on it.

It is a figure which shows an example of a package body with a gusset. It is a perspective view which shows a part of gusset formation apparatus common to this invention and a prior art example. It is a figure which shows one suitable embodiment of this invention. It is a front view of one embodiment of an end seal device. It is the sectional view on the AA line in FIG. FIG. 3 is a cross-sectional view taken along the line BB in FIG. It is CC sectional view taken on the line in FIG. 2 (illustration omitted of a gusset formation apparatus part). It is a front view which shows a gusset formation apparatus. It is a figure which shows a gusset nail | claw and its drive means.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 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 33a, 33b Top sealer 70 Gazette forming apparatus 71 Gazette claw 72 For gusset Drive motor 73 Oscillating lever 73a Pin 74 Guide plate 74a Guide hole 75 Slider 76 Guide rail

Claims (4)

Horizontal automatic packaging that seals in a horizontal direction between a pair of upper and lower top sealers that revolve and move along a predetermined trajectory of a tubular film in which a packaged object is contained at predetermined intervals and conveyed in a horizontal direction Machine end seal device,
A drive mechanism that revolves the top sealer along a predetermined path while maintaining the state where the seal surfaces of the top sealer are opposed to each other;
Following the movement of the top sealer in the front-rear direction, it moves along the transport direction of the tubular film, and both side surfaces in the traveling direction across the end seal portion of the tubular film before and after the sealing by the top sealer are gusseted. A gusset forming device for forming a gusset by pushing inward with a nail and making a crease on the side surface of the tubular film,
In the gusset forming device, the drive source for reciprocating the gusset claw toward the inward is constituted by a drive motor different from the drive source for revolving the top sealer,
The gusset claws are respectively provided on both sides of the tubular film so as to be movable up and down,
The drive motor is provided on each gusset claw, and each drive motor rotates forward and backward within a predetermined angle range,
The output shaft of the drive motor and the gusset claw are linked through a motion conversion mechanism that converts forward and reverse rotational motion into reciprocating linear motion,
The motion conversion mechanism includes a swing lever that rotates forward and backward in cooperation with the output shaft, and a guide plate that reciprocates linearly in the horizontal direction integrally with the gusset claw. A pin attached to the tip of the swing lever is attached to a vertically extending guide hole provided in the guide plate, and the relative height position of the pin in the guide hole is changed to raise and lower the drive motor. An end seal device characterized in that the gusset claw can be moved up and down without being moved .   The end seal device according to claim 1, wherein the drive motor is a motor capable of adjusting a rotation angle range such as a servo motor.   The drive mechanism is configured such that a mechanism for moving the top sealer up and down and a drive mechanism for moving the top sealer forward and backward operate based on outputs of different drive motors. The end seal device according to claim 1 or 2.   The drive mechanism includes a mechanism for vertically moving the upper top sealer, a mechanism for vertically moving the lower top sealer, and a drive mechanism for moving the top sealer forward and backward, respectively. The end seal device according to 1 or 2, wherein the end seal device is configured to operate based on power from the drive motor.

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