JP5161139B2 - Horizontal sealing device for filling and packaging machine - Google Patents

Description

  The present invention relates to a horizontal sealing device installed in a filling and packaging machine that continuously manufactures a packaging bag filled with contents as a bag by heat-sealing a long band-like film.

  Conventionally, for products that can flow, such as liquids, in the process of continuously taking out a long strip of wound film and transporting it from the top to the bottom, both edges are folded by a folding device and folded by a vertical seal device. The side sealing device is formed into a cylindrical shape, and the packaging film is sealed in a lateral direction by a lateral sealing device to form a bag, and a filling device nozzle is inserted into this to fill the contents, and then the lateral sealing device 2. Description of the Related Art A filling and packaging machine is known that forms a packaging bag by cutting and separating the packaging bag continuously formed by sealing with a cutting device.

  The horizontal sealing device in the filling and packaging machine heat seals the lower end and the upper end of the packaging bag by intermittently sandwiching a long packaging film formed and transported by a pair of horizontal sealing rolls. However, since the packaging film to be heat-sealed moves at a constant speed, there is a case where the time for sandwiching between the pair of horizontal seal rolls is short and sufficient sealing cannot be performed.

  Therefore, conventionally, for example, a so-called box motion type vertical movement mechanism that reciprocates the horizontal sealing device along the packaging film is generally used to increase the sealing time and perform reliable sealing. .

  However, the box motion type vertical movement mechanism is large in movement and difficult to move up and down quickly, and cannot cope with high-speed movement of the packaging film. Therefore, a lateral roll provided with a vertical movement mechanism that moves up and down at a higher speed than a box motion type vertical movement mechanism in JP-A-63-272645, JP-A-2001-328607, JP-A-2005-187024, and the like. A device is presented.

  However, the vertical movement mechanism provided in the lateral roll device presented at the rear uses a rack, a ball screw, and further a cam mechanism. It is necessary to stop the electric motor once every time the operation is switched, and to perform forward / reverse operation. In particular, in order to move at a high speed of about 150 to 300 bags / minute, it is necessary to start and stop suddenly. However, the cam mechanism is capable of continuous vertical movement at high speed, but the groove cam forms a gap between the cam floor and the groove. It is difficult to withstand an impact in the gap, and in particular, there is a problem because the lateral seal device has, for example, 30 kg, and has a considerable weight as a whole. In addition, it is necessary to attach counterweights to prevent vibration in rotating cams. However, if two cam floors are attached to one cam and used separately for the horizontal roll device and counterweight, the number of discs will be horizontal. However, there is also a problem that the entire apparatus becomes large because of protruding forward and backward.

JP-A-63-272645 JP 2001-328607 A JP 2005-187024 A

  The present invention has been made in view of the above circumstances, and of course, the speed of vertical movement can be adjusted steplessly, and sufficient heat sealing is possible in response to high-speed packaging film transfer. It is another object of the present invention to provide a horizontal sealing device for a filling and packaging machine provided with a vertical movement mechanism that has no vibration and excellent durability.

In order to solve the above-mentioned problems, the horizontal sealing device in the filling and packaging machine according to the present invention is configured by aligning both edges by a folding device in the process of continuously taking out a long and belt-like packaging film and transferring it from above to below. Folding, sealing the folded portion with a cantilevered vertical seal device arranged on both sides of the combined ends, and packaging with a horizontal seal device arranged below the vertical seal device The film is sealed in the lateral direction to form a bag, and after filling the contents by inserting the nozzle of the filling device into this, it is further sealed by the horizontal sealing device to cut the continuously formed packaging bag a the transverse sealing device in the deployed filling and packaging machine in a box-shaped to cut into individual cases by the device, packaging off formed into a cylindrical shape by sealing the folded portion by the longitudinal sealing device A sealing portion having a pair of lateral seal rolls to seal the Lum laterally said seal portion in the vertical direction is disposed above the movable said seal portion in the vertical direction based disposed along the casing And a vertical movement mechanism that reciprocates , wherein the vertical movement mechanism has a crankshaft supported by a needle bearing on the base and the fixture, and is formed by a split body at the shaft end of the crankshaft. A pair of connecting rods that pivotally support the crankpins are arranged to face each other in the vertical direction (vertical direction), and the lower connecting rods can freely rotate on a support shaft that supports the seal portion of the vertical movement mechanism. is supported forms the reciprocating crank mechanism, the upper connecting rod to the counterweight reciprocates in the vertical direction is rotatably supported by the reciprocating crank mechanism is formed And it has, and the counterweight, characterized in that it is arranged in the cavity formed in the substantially horizontal direction opposite sides of the packaging film which moves in the vertical direction as the longitudinal sealing device.

  By using a reciprocating crank mechanism as a vertical movement mechanism for reciprocating the seal part, it is possible to smoothly and continuously reciprocate in the vertical direction at a high speed, and to cope with the transfer of a high speed packaging film. Since there is no play like the cam mechanism, there is little vibration, and control for changing the speed between sealing and returning is easy.

  Further, in the present invention, the reciprocating crank mechanism is disposed above the seal portion, and the connecting rod to the lateral seal device is connected to the crankshaft constituting the reciprocating crank mechanism above the reciprocating crank mechanism. When a counterweight that reciprocates up and down is installed by a reciprocating crank mechanism composed of connecting rods arranged symmetrically with each other, it can smoothly move up and down at high speed without vibration. By arranging the weight in a space on the side where the vertical seal device is not installed, the empty space in the device frame can be used effectively.

  Furthermore, in the present invention, when the crankpin and the connecting rod on the crankshaft are pivotally supported via a needle bearing, high speed operation is possible without using an oil bath in the pivotal support portion, and the size can be reduced. When the crankpin for supporting the connecting rod in the crankshaft is formed of a divided body, the needle bearing can be effectively implemented, and the crankshaft is supported by the apparatus by a plurality of supports that are supported by the bearing. When it is, durability can be improved.

  As described above, according to the present invention, the side of a filling and packaging machine provided with a vertical movement mechanism that is capable of sufficient heat sealing in response to high-speed packaging film transfer and excellent in durability without vibration. A sealing device can be provided.

1 is a schematic view of a filling and packaging machine using a horizontal sealing device according to an embodiment of the present invention. The schematic longitudinal cross-sectional view which shows embodiment in this invention shown in FIG. The perspective view front view seen from the front side of the state which removed the drive motor of the vertical movement mechanism which shows embodiment shown in FIG. The perspective view seen from the back side which removed the case of embodiment shown in FIG. The perspective view of the state which removed some counterweight members in FIG.

  Next, a preferred embodiment of the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows an outline of a filling and packaging machine 2 using a lateral sealing device 1 according to the present invention, and a film original obtained by winding a long, strip-shaped packaging film F in a roll shape in a box-shaped case 21. The guide 3 is disposed on the upper side, the guide device 4 for taking out the packaging film F wound around the original packaging film 3 is disposed on the upper side, and the film folding device 5 is disposed on the lower side. Further, a vertical sealing device 6, a filling device 7, a notch forming device 8, a horizontal sealing device 1 according to the present invention, a cutter device 9 and the like are disposed below the vertical sealing device 6.

  The present filling and packaging machine 2 folds the packaging film F, which is continuously transported from the film original fabric 3 through the guide device 4, with the both edges aligned by the film folding device 5 and folded by the vertical sealing device 6. After sealing the portion to form a cylinder, the lateral sealing device 1 according to the present invention is used to laterally seal the packaging film F and the contents are filled from the filling device 7, and then the lateral sealing according to the present invention. A continuous packaging bag is formed by sealing with the apparatus 1 and, if necessary, cooled by a cooling roller apparatus 10 and then individually cut and separated by a cutter apparatus 9 to automatically form a packaging bag. It is.

  And the horizontal sealing apparatus 1 which is this invention is arrange | positioned above the said seal part 11 and the seal part 11 which has a pair of horizontal seal roll 111,111 which mainly seals the packaging film F to a horizontal direction, and the seal part 11 And a counterweight 13 disposed above the vertical movement mechanism 12 and reciprocated by the vertical movement mechanism 12 in the vertical direction. In the embodiment, the vertical movement mechanism 12 and the counterweight 13 are disposed in the space A formed in the case 21 on the opposite side of the vertical sealing device 6 with the packaging film F to be transferred interposed therebetween, so that the height of the entire device is increased. It can be arranged very effectively without increasing the sheath width.

  2 to 5 are enlarged views showing the vicinity of the horizontal sealing device 1 according to the present embodiment in detail. FIG. 2 is a schematic longitudinal sectional view, and FIG. 3 shows a drive motor 124 of the vertical movement mechanism 12. FIG. 4 is a perspective view seen from the rear side from which the case 21 has been removed, and FIG. 5 is a perspective view from which a part of the counterweight member 133 has been removed in FIG. .

  The seal portion 11 according to the present embodiment is arranged in the longitudinal direction with a predetermined interval between them by fixing tools 24, 24 arranged on both ends of the base 23 arranged along the case 21 shown in FIG. It is attached to a small base 27 supported by a pair of upper and lower sliding members 26, 26 slidably fitted to the two sliding rods 25, 25 provided.

  The seal portion 11 attached to the small base 27 has substantially the same structure as that conventionally used in this type of filling and packaging machine, and includes a drive source 112 such as two servo motors and an air A gear 115 and 116 are engaged with and rotated by a pair of horizontal seal rolls 111 and 111 in which a heat-seal band-like heat plate 114 is intermittently arranged on the outer peripheral surface by a drive source 113 formed of a cylinder, thereby causing a predetermined The packaging film transported between the horizontal sealing rolls 111 and 111 every time is laterally sealed.

  Further, the vertical movement mechanism 12 that moves the seal part 11 up and down is supported by a base 23 arranged along the case 21 shown in FIG. 1 so that the seal part 11 is supported so as to be movable in the vertical direction. A cross section fixed so as to surround the sliding rods 25 and 25 is arranged above the seal portion 11 by an H-shaped fixture 121.

  The vertical movement mechanism 12 is a crankshaft that is rotated by a drive source 124 such as a servo motor supported by the apparatus by a plurality of supports 122 and 123 supported by bearings provided at least on the fixture 121 and the base 23. 125.

  The crankshaft 125 has a pair of crankpins 126 and 127 facing in the vertical direction (vertical direction) with the support 122 interposed therebetween, and connecting rods 128 and 129 are connected to the crankpins 126 and 127, respectively. Each is pivotally supported. The shaft end of one connecting rod 128 is rotatably supported by a support shaft 117 protruding from a small base 27 that supports the seal portion 11, and the shaft end of the other connecting rod 129 slides the counterweight 13 on the slide. It is rotatably supported by a support shaft 132 projecting from a support plate 131 supported on a base 23 so as to be vertically movable by sliding members 28, 28 slidably fitted on the sliding rods 25, 25. Therefore, when the crankshaft 125 is rotated, a reciprocating crank mechanism is configured that moves up and down in a state where the seal portion 11 and the counterweight 13 are always in symmetrical positions in the vertical direction across the crankshaft 25. Therefore, even if the seal part 11 is moved up and down at high speed by the vertical movement mechanism 12, it can be operated in a stable state without causing unnecessary vibration.

  In particular, in the present embodiment, the crankpins 126 and 127 and the connecting rods 128 and 129 on the crankshaft 125 are pivotally supported via the needle bearing 130, so that high-speed operation can be achieved without using an oil bath for the pivotal support. It can be made small.

  Further, in the present embodiment, the crank pins 126 and 127 are formed by the divided bodies 126a and 126b and 127a and 127b, respectively, so that the needle bearing 130 can be effectively implemented, and smooth vertical movement can be achieved. it can.

  In the drawings, reference numeral 133 denotes a counterweight member attached to the support board 131. In this embodiment, the counterweight 13 is formed of a plurality of counterweight members. In addition to being able to accurately adjust the weight according to the moving speed of movement, it also has the advantage of facilitating internal inspection and maintenance.

  DESCRIPTION OF SYMBOLS 1 Horizontal sealing device, 2 Filling packaging machine, 5 Folding device, 6 Vertical sealing device, 7 Filling device, 9 Cutting device, 11 Seal part, 12 Vertical movement mechanism, 13 Counterweight, 125 Crankshaft, 126,127 Crank pin, 128,129 Connecting rod, 130 Needle bearing

Claims (2)

In the process of continuously taking out a long and strip-shaped packaging film and transferring it from the top to the bottom, the folding device aligns and folds both edges, and the combined ends are arranged on the combined ends. The folded portion is sealed by a vertical sealing device and formed into a cylindrical shape, and the packaging film is sealed in a lateral direction by a horizontal sealing device arranged below the vertical sealing device to form a bag, and a nozzle of the filling device is provided therewith In a filling and packaging machine arranged in a box-shaped case that is inserted and filled with contents, and further sealed by the transverse sealing device and individually cut by a cutting device. wherein a lateral sealing device, the sealing portion having a pair of lateral seal rolls to seal the packaging film formed into a tubular shape by sealing the folded portion by the vertical sealing device in the transverse direction, before The foundation is arranged along the casing and the sealing portion which is arranged above the movable said seal portion in the vertical direction with a vertical movement mechanism for reciprocating in the vertical direction, the vertical movement mechanism, wherein A pair of connecting rods, which are supported by a base and a fixture through a needle bearing and a crank pin formed by a split body at the shaft end of the crank shaft, are vertically (vertical). Each of the lower connecting rods is opposed to each other, and is freely supported by a support shaft that supports the seal portion of the vertical movement mechanism to form a reciprocating crank mechanism. A counterweight that reciprocates in the vertical direction is pivotally supported to form a reciprocating crank mechanism, and the counterweight is connected to the vertical seal device and the vertical direction Transverse sealing device in the filling and packaging machine, characterized by being arranged in a cavity formed in the substantially horizontal direction opposite sides of the packaging film to move. The crankshaft has a pair of crankpins facing each other in the vertical direction (vertical direction) with a support interposed therebetween, and connecting rods are respectively supported by these crankpins. end is rotatably supported on a support shaft that collision set in the small base for supporting the seal portion, the shaft end of the other connecting rod, juxtaposed counterweight vertically with a predetermined gap a support shaft that collision set in the small base for supporting the seal portion supported by sliding member slidably is fitted to a sliding punch, which is characterized in that it is pivotably supported The horizontal sealing apparatus in the filling and packaging machine according to claim 1.

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