JP4163036B2 - End seal device for horizontal bag making and filling machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an end seal device in a horizontal bag making and filling machine.
[0002]
[Prior art]
When an end seal is applied to the tubular film at a position before and after the article supplied to the tubular film at predetermined intervals, the seal body is moved along the film transfer direction together with the film while the tubular film is sandwiched by the seal body. A so-called box motion type end seal device that moves can obtain a favorable seal strength, and is therefore suitably used for packaging an article to be packaged that requires a particularly high degree of sealing. As a driving method of this end seal device, for example, a method in which one servo motor is used as a driving source and the seal body is moved up and down and moved in the film transport direction through various mechanical linkage mechanisms such as a cam or a link mechanism. Is generally adopted (see, for example, Patent Document 1).
[0003]
According to the first prior art described above, the sealing operation accompanying the movement of the seal body in the horizontal direction and the movement in the vertical direction is operated by a mechanical interlocking mechanism. It is impossible to change the individual operation conditions to arbitrary values, such as setting a period for holding and sealing at a long time, or setting an opening interval between the upper and lower sealing bodies to an arbitrary value. Also, since the combined movement of the horizontal movement of the seal body and the upper and lower opening / closing operations is performed by a single servo motor via a mechanical linkage mechanism, vibration is likely to occur during high-speed packaging, and the load on the motor is also increased. Since this increases, the upper limit value of the packaging capacity for performing the sealing operation within a range that does not hinder packaging has been restricted.
[0004]
In order to address the above problems, separate motor drive sources are used for the horizontal movement of the seal body and the upper and lower opening and closing operations, and the upper and lower opening and closing operations can be arbitrarily controlled without being restricted by the horizontal movement of the seal body. There has been proposed an end seal device that can be changed to (see, for example, Patent Document 2). By adopting this technology, regardless of the horizontal movement of the seal body, the movement speed of the seal body accompanying the opening and closing operation of the seal body, the period during which the seal body holds the film, or when the seal body is opened It is possible to adapt to various packaging conditions by setting the intervals to arbitrary values as necessary.
[0005]
[Patent Document 1]
JP-A-9-301325
[Patent Document 2]
JP 7-291234 A
[0006]
[Problems to be solved by the invention]
According to the second prior art described above, the vertical opening / closing operation of the seal body and the horizontal movement each employ a method of reciprocating by rotating the motor provided separately forward and backward, It is not suitable for high-speed operation due to the load on the motor. Further, when the seal body moves horizontally, an inertial force based on the mass of the seal unit including the pair of seal bodies and the motor for opening / closing operation acts as a load on the motor for horizontal operation and causes generation of vibrations. The packaging capacity is limited as in the first prior art.
[0007]
OBJECT OF THE INVENTION
The present invention has been proposed in order to suitably solve the above-described problems related to the conventional technology, and can suppress the generation of vibrations associated with the sealing operation and increase the limit value of the packaging capacity. An object of the present invention is to provide an end seal device in a horizontal bag making and filling machine.
[0008]
[Means for Solving the Problems]
  In order to overcome the above-described problems and achieve the desired purpose suitably, the end seal device in the horizontal bag making and filling machine according to the present invention includes:
  A pair of sealing bodies that face each other up and down across the transfer path of the cylindrical film filled with the packaged object and move in the transfer direction along with the transfer of the cylindrical film are opposed to each other and moved away from each other. In an end seal device in a horizontal bag making and filling machine that applies end seals before and after sandwiching the packaged film-shaped object,
  The pair of seal bodies are arranged to be vertically movable.The seal unitBy the slide means provided on the machine frameAgainst the machine frameArranged so that it can move horizontally along the film transfer direction.And
  The machine frameIsFirst drive motorAnd connected to the seal unit, the first unitBy rotating the drive motor continuously in a certain direction,Against the machine frameMove back and forth horizontallyCrank mechanismWhenThe second2 drive motorAnd the secondBy continuously rotating the drive motor in a certain directionA rotation mechanism for turning the rail member in a horizontal posture, and
The pair of seal bodies are moved closer to and away from each other in the seal unit by an opening / closing operation mechanism linked to the rail member.It is characterized by comprising.
[0009]
  In order to overcome the above-described problems and achieve the desired object suitably, an end seal device in a horizontal bag making and filling machine according to another invention of the present application is:
  A pair of sealing bodies that face each other up and down across the transfer path of the cylindrical film filled with the packaged object and move in the transfer direction along with the transfer of the cylindrical film are opposed to each other and moved away from each other. In an end seal device in a horizontal bag making and filling machine that applies end seals before and after sandwiching the packaged film-shaped object,
  A first slide means provided with a pair of moving bodies that are spaced apart in the width direction of the machine frame and arranged to be horizontally movable along the film transfer direction;
  Provided in the moving body,The pair of seal bodiesTheArranged vertically movabledidA seal unit;
  By the second slide means provided on the machine frame, Between the pair of moving bodies below the opening / closing position of the pair of seal bodiesA balance weight arranged to be horizontally movable;
  SaidMoving bodyReciprocating horizontallyYouA main crank mechanism,
  A cooperative crank mechanism that operates integrally with the main crank mechanism to reciprocate the balance weight in the horizontal direction;
  Arranged in the machine frame,in frontNoteThe horizontal movement of the control unit and the balance weight in opposite directionsFrom the servo motor that drives both the crank mechanismsIt is configured.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Next, a preferred embodiment of the end seal device in the horizontal bag making and filling machine according to the present invention will be described below with reference to the accompanying drawings.
[0011]
1 to 3 show an overall configuration of an end seal device in a horizontal bag making and filling machine according to an embodiment of the present invention, and this end seal device 10 is continuously center-sealed, A cylindrical film F filled with an article to be packaged M is supplied at a predetermined interval.
[0012]
The machine frame 11 of the end seal device 10 is disposed so that the height of the machine frame 11 can be adjusted via a fixed machine frame 12 formed in a rectangular frame shape, and a height adjusting unit 72 described later with respect to the fixed machine frame 12. And a movable machine frame 13. As shown in FIG. 2, a pair of guide members 14 and 14 extending in the vertical direction are spaced apart from each other by a predetermined distance in the film transport direction on the inner surfaces of both sides in the width direction intersecting the film transport direction in the fixing machine frame 12. The movable machine frame 13 is configured to move up and down in parallel along the inner surfaces of the fixed machine frame 12 and the four guide members 14.
[0013]
As shown in FIGS. 3 and 4, a pair of guide rods 15, 15 extending horizontally in the film transport direction are disposed in parallel on the movable machine frame 13 so as to be spaced apart from each other in the width direction. The movable bodies 16 are slidably disposed. A slide shaft 17 having a predetermined length is inserted into and supported by each moving body 16 so as to be slidable in the vertical direction, and the lower ends of the pair of slide shafts 17 and 17 extending downward from both moving bodies 16 and 16. Are connected by a first support member 18, and upper end portions of both slide shafts 17, 17 extending upward from both moving bodies 16, 16 and facing upward from the film transport path are connected by an upper holding member 19. . Below the upper holding member 19, a first seal body 20 whose seal surface faces the transfer path of the tubular film F is disposed so as to be movable up and down. The first seal body 20 is always urged downward by springs 21 and 21 as elastic members, and the first seal body 20 and a second seal body described later by the springs 21 and 21. 26 functions to hold the tubular film F at a predetermined pressure. Further, the first seal body 20 is internally provided with a cutter, and is configured to cut the tubular film F at the time of contact with the second seal body 26. In the embodiment, a slide set 22 is constituted by the guide rod 15 and the moving body 16, and a first slide means 23 is constituted by a pair of slide sets 22 and 22 which are separated in the width direction.
[0014]
A second support member 24 parallel to the first support member 18 is disposed on the slide shafts 17 and 17 between the moving bodies 16 and 16 and the upper holding member 19 so as to be vertically movable via holders 25 and 25. Thus, the first support member 18 and the second support member 24 can be moved close to and away from each other. On the upper surface of the second support member 24, a second seal body 26 facing the first seal body 20 in parallel across the film transport path with the seal surface directed to the film transport path. It is arranged. Then, by operating an opening / closing operation mechanism 46, which will be described later, the upper and lower sealing bodies 20, 26 move toward and away from each other. It is configured to provide an end seal under pressure. Further, the seal unit 27 including the upper and lower seal bodies 20, 26, the slide shafts 17, 17, the first and second support members 18, 24, the holder 19, and the spring 21 operates a horizontal operation mechanism 32 described later. Thus, the pair of slide sets 22 and 22 is moved horizontally in the film transfer direction.
[0015]
A pair of guide rails 28, 28 extending in parallel with the guide rod 15 and spaced apart in the width direction are disposed on the movable machine frame 13 so as to face the movable bodies 16, 16. Yes. A balance weight 29 is mounted between the guide rails 28 and 28 via a plurality of wheels 30 so as to be able to reciprocate horizontally. In the embodiment, the second slide means is constituted by the guide rail 28 and the wheel 30. The balance weight 29 is set to a mass corresponding to the mass including the seal unit 27 and a member interlocking in the same direction in relation to the horizontal movement of the unit 27, and preferably includes the seal unit 27 and the interlocking member. The mass is set to be approximately equal to the mass. The balance weight 29 is horizontally moved in a symmetrical direction opposite to the seal unit 27 by the horizontal operation mechanism 32 to suppress the occurrence of vibration due to the inertial force accompanying the horizontal movement of the seal unit 27 during the seal operation. Function. The members that are linked in the same direction in relation to the horizontal movement of the seal unit 27 are the opening / closing operation mechanism 46, the moving bodies 16 and 16 constituting the first slide means 23, and the movement of transfer conveyors 73 and 74 described later. Frames 76 and 76, various mechanism members disposed thereon, cam plates 79 and 80 for opening and closing the moving frames 76 and 76 in the horizontal direction, and the like. The balance weight 29 is preferably configured such that a plurality of plate weights are detachably mounted on a base traveling on the guide rails 28, 28, so that the balance weight 29 can be used together with the seal unit 27. It is possible to easily cope with the case where the mass changes due to the design change of each moving mechanism.
[0016]
  As shown in FIG. 4, a support frame 31 composed of a pair of side plates 31 a and 31 a spaced apart in the width direction is disposed at the downstream end of the movable machine frame 13 in the film transfer direction, and is disposed on the support frame 31. By the horizontal operation mechanism 32, the seal unit 27 is configured to reciprocate horizontally along the film transfer direction. This horizontal operating mechanism32Comprises a main crank mechanism 34 composed of a pair of crank operating portions 33, 33 linked to both the moving bodies 16, 16, and a cooperative crank mechanism 35 linked to the balance weight 29. The cooperative crank mechanism 35 is configured to be integrally operated by a first servo motor 36 as a first drive motor.
[0017]
The pair of crank operating portions 33, 33 constituting the main crank mechanism 34 are located on both sides in the width direction across the cooperative crank mechanism 35. Each crank actuating portion 33 has a first spur gear 37 pivotally supported by a corresponding side plate 31 a constituting the support frame 31, and a first spliced to an eccentric position of the first spur gear 37. The other end of the first connecting rod 38 is rotatably connected to the inside of the corresponding moving body 16. A drive shaft 39 is pivotally supported between the side plates 31a and 31a, and a second spur gear 40 meshing with each first spur gear 37 is arranged on the drive shaft 39 so as to rotate integrally therewith. Established. The drive shaft 39 is connected to a first servo motor 36 disposed on the support frame 31 via a transmission means 41 including a pulley and an endless belt, and rotates by continuously rotating the motor 36 in a certain direction. Due to the crank movement of the first connecting rods 38, 38 connected to the first spur gears 37, 37, both the moving bodies 16, 16, that is, the seal unit 27 move horizontally along the guide rods 15, 15. ing.
[0018]
The crank lever 84 that rotates integrally with the one first spur gear 37, and the phase with respect to the crank lever 84 is 180 degrees in the circumferential direction with respect to the connection position of the first connecting rod 38 in one first spur gear 37. The cooperative crank mechanism 35 is constituted by a second connecting rod 42 having one end rotatably connected to different positions, and the other end of the second connecting rod 42 is rotatably connected to the balance weight 29. (See FIG. 5). One end of the other first spur gear 37 is connected to the connecting position of the second connecting rod 42 in the crank lever 84, and the other end of the connecting rod 85 is connected to the connecting position of the first connecting rod 38 in the other first spur gear 37. The other end of the connecting member 86 is connected. That is, the cooperative crank mechanism 35 is connected to the crank operating portions 33, 33 located on both sides and operates stably and integrally. However, the connection structure between the cooperative crank mechanism 35 and the both crank operating portions 33, 33 is not limited to the configuration of the embodiment, and the cooperative crank mechanism 35 is connected to both the crank operating portions 33, 33. In any case, various other configurations such as a configuration connected via a crank lever 84 can be adopted, and the cooperative crank mechanism 35 and both crank operating portions 33 and 33 operate integrally. That's fine. In the embodiment, the first connecting rod 38 is pivotally supported on the shaft portion connecting the other first spur gear 37 and the connecting rod 85 so as to freely rotate, and the crank lever 84 and the connecting rod 85 are connected. The second connecting rod 42 is pivotally supported on the shaft portion of the connecting member 86 to be freely rotatable.
[0019]
When the seal unit 27 moves horizontally by continuously rotating the first servo motor 36 in a fixed direction, the balance weight 29 is integrated along the guide rails 28 and 28 by the crank movement of the second connecting rod 42. Configured to move horizontally. However, since the phase of the connection position of the first connection rod 38 with respect to the first spur gear 37 and the connection position of the second connection rod 42 with respect to the crank lever 84 is set to be 180 degrees different, the seal unit 27 and the balance weight 29 are set. When the seal unit 27 moves upstream, the balance weight 29 moves downstream, and conversely when the seal unit 27 moves downstream, the balance weight 29 moves upstream. Move to the side. As a result, the inertial force accompanying the horizontal movement of the seal unit 27 can be offset by the horizontal movement of the balance weight 29, and the occurrence of vibration can be suppressed.
[0020]
As shown in FIGS. 3 and 4, the cooperative crank mechanism 35 is located between the two crank operating portions 33, 33, and is connected to the first connecting rod 38 relative to the moving body 16 and the first weight relative to the balance weight 29. The connecting position of the two connecting rods 42 is set to the same horizontal level, and is configured to further suppress the occurrence of vibration during the horizontal operation of the seal unit 27 and the balance weight 29. Even when the main crank mechanism 34 is composed of only the crank operating portion 33 located on one side with respect to the cooperative crank mechanism 35, the crank operating portion 33 and the cooperative crank mechanism 35 are provided. Can be prevented from generating vibrations.
[0021]
A third spur gear 43 is pivotally supported on the outer surface of each moving body 16 so as to be rotatable. The other end portion of each first operating rod 44 whose one end portion is rotatably connected to the eccentric position of each third spur gear 43 is rotatably connected to the first support member 18. The other end of each second operating rod 45 is connected to the third spur gear 43 so that one end thereof is pivotally connected to a position that is 180 degrees out of phase with the pivot position of the first operating rod 44 in the circumferential direction. Is rotatably connected to each holder 25 of the second support member 24. That is, when the third spur gear 43 is rotated in a certain direction by a rotation mechanism 61 described later, the first support member 18 and the second support member 24 are mutually moved by the crank movement of the two operating rods 44 and 45. The upper and lower seal bodies 20 and 26 are configured to move toward and away from each other across the film transfer path. In the embodiment, the first operating rod 44, the second operating rod 45, the third spur gear 43 and the rotating mechanism 61 constitute an opening / closing operating mechanism 46. As shown in FIG. 3, an interlocking shaft 48 extending in the width direction is pivotally supported via bearings 47 and 47 on the downstream side of the both moving bodies 16 and 16, and the interlocking is performed. A fourth spur gear 49 that meshes with each of the third spur gears 43 is disposed on the shaft 48 so as to be integrally rotatable, and both the third spur gears 43 and 43 are configured to rotate integrally.
[0022]
As shown in FIG. 1, a pair of brackets 50 and 51 are disposed on one side in the width direction of the movable machine frame 13 so as to be spaced apart from each other in the film transport direction. A fifth spur gear 53 is disposed at the inner end of the supported first operating shaft 52 so as to rotate integrally therewith and a second operating shaft 54 pivotally supported by the bracket 51 on the downstream side. One end of the support member 55 is connected to the inner end portion of the support member 55 so as to rotate integrally. One end of the fifth spur gear 53 is pivotally connected to the eccentric position and the other end of the rail member 56 extending in the film transport direction is pivotally connected to the other end of the support member 55. The rail member 56 is always held in a horizontal posture. The rail member 56 is formed with a long hole 56a extending in the film transfer direction, and a follower 57 pivotally supported in the long hole 56a so as to be pivotable to an eccentric position of the one third spur gear 43. Is ready to roll. Further, the first linkage 58 is disposed so as to rotate integrally with the outer end portion of the first actuation shaft 52, and the second linkage 59 rotates integrally with the outer end portion of the second actuation shaft 54. The operating rod 60 is rotatably connected between one end portions of the first and second linkages 58, 59 extending in the radial direction. That is, in the embodiment, the rotation mechanism 61 is constituted by the fifth spur gear 53, the support member 55, the first linkage 58, the second linkage 59, the operating rod 60, and the rail member 56. The rotation mechanism 61 will be described later. The second servo motor 65 is operated.
[0023]
A pivot shaft 62 is pivotally supported by the upstream bracket 50, and a sixth spur gear 63 arranged to rotate integrally with the inner end portion of the pivot shaft 62 includes the first spur gear 63. It meshes with a 5-spur gear 53. The pivot shaft 62 is connected to a second servo motor 65 as a second drive motor disposed in the bracket 50 via a transmission means 64 composed of a pulley and an endless belt, and the motor 65 is connected in a certain direction. The fifth spur gear 53 that meshes with the sixth spur gear 63 is configured to rotate in a fixed direction by continuously rotating at a constant speed. As the fifth spur gear 53 rotates, the support member 55 rotates in the same direction via the operating rod 60, the second linkage 59, and the second operating shaft 54, and the rail member 56 maintains a horizontal posture. It is comprised so that turning motion may be performed. As a result, the third spur gear 43 rotates in a certain direction via the follower 57 engaged with the elongated hole 56a of the rail member 56, and the first and second operating rods 44, The first support member 18 and the second support member 24 connected via 45 move toward and away from each other, and as a result, the upper and lower seal bodies 20 and 26 move toward and away from each other (up and down movement). It is like that. Further, the opening / closing operation mechanism 46 controls the speed of rotation of the second servo motor 65 so that the first seal body 20 and the second seal body 26 move most upstream and then move downstream. They are set so that they can be brought close to each other at a predetermined timing during the movement and separated from each other at a predetermined timing until the movement to the most downstream side.
[0024]
In other words, in the embodiment, the first and second servo motors 36 and 65 are continuously rotated in a predetermined direction, whereby the horizontal operation mechanism 32 and the opening / closing operation mechanism 46 are operated, and the first seal body 20 and the second The seal body 26 is in close contact with each other on the upstream side in the film transfer direction, horizontally moves downstream in this contact state, and then moves away from each other and horizontally moves upstream (box motion). Repeat. The moving speed in the film transfer direction when the seal bodies 20 and 26 are in contact is set so that the first servomotor 36 is rotationally controlled at substantially the same speed as the film transfer speed. The first and second servo motors 36 and 65 are configured to transfer the tubular film F obtained from the film cut pitch set in accordance with the size of the article to be packaged M and a desired packaging speed, The speed change control is set according to the set packaging speed.
[0025]
As shown in FIG. 3, an adjustment shaft 66 extending in the width direction is pivotally supported on the upper portion of the fixed machine frame 12. First helical gears 67, 67 are arranged to be integrally rotatable. Further, second helical gears 68 that mesh with the first helical gears 67 are pivotally supported on both sides in the width direction of the fixed machine frame 12, respectively, and extend vertically in the second helical gears 68. An existing adjustment screw 69 is arranged to rotate integrally, and the adjustment screw 69 is screwed into a female screw hole formed in a support member 70 provided at a corresponding position of the movable machine frame 13. An adjustment operation handle 71 is disposed at one end of the adjustment shaft 66, and the handle 71 is rotated in the forward and reverse directions, thereby being screwed by an adjustment screw means comprising an adjustment screw 69 and a female screw hole. The movable machine frame 13 moves in the vertical direction with respect to the fixed machine frame 12. Accordingly, the height position where the pair of seal bodies 20 and 26 abut can be adjusted according to the height of the article to be packaged M transferred by transfer conveyors 73 and 74 described later. The support member 70, the female screw hole, the adjusting screw 69 and the adjusting shaft 66 constitute a height adjusting means 72.
[0026]
A first transfer conveyor 73 and a second transfer conveyor 74 having the same transfer level are arranged in series on the upstream side and the downstream side in the film transfer direction across the end seal device 10. In addition, since the structure of both the transfer conveyors 73 and 74 is substantially symmetrical, only the structure of the 1st transfer conveyor 73 is demonstrated, and the same code | symbol shall be attached | subjected and shown to the same member of the 2nd transfer conveyor 74.
[0027]
That is, the first transfer conveyor 73 disposed on the upstream side is disposed so that the fixed frame 75 disposed on the upper part of the fixed machine frame 12 and the horizontal movement in the film transport direction can be performed inside the fixed frame 75. Moving frame 76. A plurality of pulleys 77 are rotatably supported by the fixed frame 75 and the moving frame 76, and an endless belt 78 is wound around these pulleys 77 so as to be able to run, thereby forming a first transfer conveyor 73. The motor 78 is driven in a required direction by a motor (not shown).
[0028]
In the first transfer conveyor 73, the endless belt 78 is set to run in the required direction at substantially the same speed as the film transfer speed, and the cylinder filled with the article M to be packaged placed on the endless belt 78. The film F is transferred toward the end seal device 10. In the second transfer conveyor 74, the endless belt 78 is set to be higher than the traveling speed of the endless belt 78 in the first transfer conveyor 73. The preceding package body that has been cut can be reliably separated from the subsequent unwrapped body and discharged.
[0029]
As shown in FIG. 1 or FIG. 3, first cam plates 79 having first cam grooves 79a are disposed on both the left and right sides in the width direction near the downstream end of the moving frame 76 of the first transfer conveyor 73, respectively. Yes. Further, second cam plates 80 having second cam grooves 80a are disposed on both the left and right sides in the width direction near the upstream end of the moving frame 76 of the second transfer conveyor 74, respectively. The first cam groove 79a and the second cam groove 80a formed in the first cam plate 79 and the second cam plate 80 positioned in the front and rear of the film transfer direction across the first seal body 20 are shown in FIG. As shown in FIG. Then, the first roller 82 pivotally supported by the holding member 81 provided in the holder 25 of the second support member 24 is engaged with the first cam groove 79a so as to be capable of rolling, and the second roller A second roller 83 that is also pivotally supported by the holding member 81 is engaged with the cam groove 80a so as to be able to roll.
[0030]
The shape of the first and second cam grooves 79a and 80a is such that the opposing end portions of the transfer conveyors 73 and 74 advance and retract along the film transfer direction in accordance with the operation of the second seal body 26. In addition, they are set so as to be close to and away from each other. That is, as shown in FIG. 1, in the state where the second seal body 26 is located at the lowest point, the opposed end portions of both moving frames 76 and 76 are close to each other, and the second seal body 26 moves upward. When the holding member 81 is lifted, the moving frames 76 and 76 are separated from each other to form a gap that allows the second seal body 26 to move upward.
[0031]
[Effect of the embodiment]
Next, the operation of the end seal device according to the embodiment will be described. As shown in FIG. 1, the opposing end portions of the first transfer conveyor 73 and the second transfer conveyor 74 are close to each other, and the first seal body 20 and the second seal body 26 in the end seal device 10 are mutually connected. It is in a state in which the tubular film F is allowed to pass apart.
[0032]
The cylindrical film F filled with the article to be packaged M supplied to the first transfer conveyor 73 is transferred downstream by an endless belt 78 that travels at the same speed as the film transfer speed. In the end seal device 10, the horizontal operation mechanism 32 and the opening / closing operation mechanism 46 are operated at a required timing by the continuous rotation of the first servo motor 36 and the second servo motor 65 in a predetermined direction, and the first seal body 20. And the second seal body 26 move upstream and approach each other at an appropriate timing. That is, the seal unit 27 is moved along the guide rods 15 and 15 by the crank movement of the first connecting rods 38 and 38 connected to the first spur gears 37 and 37 rotated in a predetermined direction by the first servomotor 36. Move upstream. At this time, the balance weight 29 moves along the guide rails 28 and 28 on the downstream side opposite to the seal unit 27 by the crank movement of the second connecting rod 42 in the cooperative crank mechanism 35. Further, the third spur gear 43 rotated through the rotating mechanism 61 operated by the second servomotor 65 rotates in the clockwise direction, so that the third spur gear 43 and the first and second support members are rotated. The first seal body 20 and the second seal body 26 are moved to the most upstream side and then moved to the downstream side by the crank motion of the first and second operating rods 44 and 45 connecting the shafts 18 and 24. While moving, they move close to each other with a predetermined timing. The moving frames 76 and 76 move away from each other in conjunction with the movement of the second seal body 26, thereby defining a gap that allows the second seal body 26 to extend upward.
[0033]
The pair of seal bodies 20 and 26 sandwiching the tubular film F moves horizontally by a required distance to the downstream side as the tubular film F is transferred by the operation of the horizontal operation mechanism 32 and the opening / closing operation mechanism 46. Thus, end sealing and cutting are performed. During the horizontal movement of the seal bodies 20 and 26 to the downstream side, the required gap is maintained between the opposed ends of the transfer conveyors 73 and 74 without contact interference between the seal bodies 20 and 26. Both moving frames 76 and 76 move horizontally downstream as they are. Further, when the seal unit 27 moves to the downstream side, the balance weight 29 moves to the upstream side opposite to the seal unit 27. That is, when the seal unit 27 is moved upstream by the main crank mechanism 34 during the sealing operation, the balance weight 29 is moved downstream by the cooperative crank mechanism 35, and the seal unit 27 is When moved downstream, the balance weight 29 is moved upstream.
[0034]
  The horizontal actuating mechanism 32 andOpenWhen the first seal body 20 and the second seal body 26 are separated from each other and release the tubular film F at a predetermined timing moved downstream by the operation of the closing operation mechanism 46, end sealing and cutting were performed. The package is quickly transferred downstream from the position where the end seal device 10 is disposed by the second transfer conveyor 74 operating at high speed. Further, since the moving frames 76 and 76 come close to each other in conjunction with the lowering of the second seal body 26, the delivery of the next packaged article M from the first transfer conveyor 73 to the second transfer conveyor 74 is smooth. To be made.
[0035]
As described above, the horizontal operation mechanism 32 that horizontally moves both the seal bodies 20 and 26 and the opening and closing operation mechanism 46 that opens and closes up and down are configured to operate independently by the corresponding servo motors 36 and 65, respectively. Regardless of the horizontal movement of the seal bodies 20 and 26, the moving speed of the seal bodies 20 and 26 accompanying the up and down opening / closing operation and the period during which the seal bodies 20 and 26 hold the tubular film F can be set to arbitrary values. It can cope with various packaging conditions. In addition, since each servo motor 36, 65 is continuously rotated in a certain direction, it can cope with high-speed packaging without increasing the load on the motor 36, 65, and the upper limit value of the packaging capacity is increased. .
[0036]
Further, when the seal unit 27 is moved horizontally, the balance weight 29 set to a mass corresponding to the total mass of the unit 27 and a member interlocked in the same direction is moved in the opposite symmetrical direction. In addition, the inertia accompanying the horizontal movement of the seal unit 27 can be offset by the horizontal movement of the balance weight 29, and the occurrence of vibration can be suppressed. In addition, the second servo motor 65 that opens and closes the seal bodies 20 and 26 is disposed on the movable machine frame 13 in which the seal unit 27 is horizontally movable so that the seal unit 27 does not move integrally. Since it is comprised, the load with respect to the 1st servomotor 36 which operates the horizontal action | operation mechanism 32 is reduced, and it can respond to speeding-up.
[0037]
Here, in the result of the test performed according to the configuration of the embodiment, when the balance weight 29 is not attached, when the balance weight 29 is attached, the swing width of the machine frame 11 at the time of driving the end seal device 10 is about 25 at maximum. It has been confirmed that the maximum value of the packaging capacity that does not affect the packaging is improved by 20%.
[0038]
Next, when the height dimension of the article to be packaged M is changed due to an order change or the like, the adjusting operation handle 71 is rotated in a required direction so that the adjusting screws 69 and 69 and the female screw holes are screwed together. The movable machine frame 13 is moved vertically up and down with respect to the fixed machine frame 12 so that the height position where the seal bodies 20, 26 abut each other is set to the intermediate position in the height direction of the package M. can do. Therefore, the end seal position of the film with respect to the packaged object M can always be in the middle in the height direction.
[0039]
[Example of change]
The present application is not limited to the configuration of the above-described embodiment, and other configurations can be appropriately employed.
1. The first slide means 23 of the seal unit 27 and the second slide means (the guide rail 28 and the wheel 30) of the balance weight 29 are not limited to the configuration of the embodiment, but the seal unit 27 and the balance As long as the weight 29 can be supported horizontally, other various slide methods can be adopted.
2. In the embodiment, the movable machine frame 13 is arranged inside the fixed machine frame 12 so as to be movable up and down. However, the machine frame 11 is not limited to this configuration, and is, for example, higher than the lower base serving as the fixed machine frame. It may be a system in which the movable machine frame is mounted so as to be adjustable up and down via the adjusting means.
3. In an apparatus that does not need to adjust the contact height of the seal bodies 20 and 26 corresponding to a plurality of articles to be packaged M having different heights, the fixed machine frame 12 and the movable machine frame 13 with respect to the machine frame 11 Only the fixed machine frame 12 may be provided without being divided into two.
4. The second servo motor 65 that operates the opening / closing operation mechanism 46 may be disposed in the seal unit 27. In this case, the third spur gear 43 can be directly rotated by the second servomotor 65, and the rotation mechanism 61 and the transmission means 64 can be omitted. When this configuration is adopted, the mass of the balance weight 29 is also added to the mass of the seal unit 27 and the second servo motor 65 interlocking in the same direction in relation to the horizontal movement of the seal unit 27. It is preferable to use a value.
[0040]
【The invention's effect】
  As described above, according to the end seal device in the horizontal bag making and filling machine according to claim 1 of the present invention, the individual drive motors that continuously rotate the horizontal movement of the seal body and the upper and lower opening and closing operations in a fixed direction. As well as each motorDoes not move with the seal unitSince it is disposed on the machine frame, it is possible to suppress the vibration during the operation of the seal body and achieve high speed.
[0041]
  Further, according to the end seal device of the second aspect, the balance weight that horizontally moves in the opposite symmetrical direction when the seal unit moves horizontally is provided.Between a pair of moving bodiesSince it is provided, the occurrence of vibration during operation can be significantly reduced, and further speeding up is possible. In the end seal device according to the third aspect, since the sliding means is arranged on the movable machine frame arranged so that the height can be adjusted with respect to the fixed machine frame, the seal position is set corresponding to the change of the order of the package. Can be changed.
[0042]
According to the end seal device of the fourth aspect, since the balance weight is configured to be replaceable, it is possible to easily cope with a change in the machine configuration. Further, in the end seal device according to the fifth aspect, since the crank operation parts for moving the seal unit are respectively disposed on both sides of the cooperative crank mechanism for moving the balance weight, the mass balance is improved and vibration is generated. Can be further suppressed.
[Brief description of the drawings]
FIG. 1 is a front view showing a part of an end seal device in a horizontal bag making and filling machine according to a preferred embodiment of the present invention.
FIG. 2 is a plan view showing a part of the end seal device according to the embodiment.
FIG. 3 is a longitudinal side view showing the end seal device according to the embodiment.
FIG. 4 is a transverse plan view showing the end seal device according to the embodiment.
FIG. 5 is a front view of the main part showing the location of the balance weight in the end seal device according to the embodiment.
[Explanation of symbols]
  11 Machine frame
  12 Fixed machine frame
  13 Movable machine frame
  16 Mobile
  20 First sealbody
  23 First slide means
  26 Second seal body
  27 Seal unit
  28 Guide rail (second sliding means)
  29 Balance weight
  30 wheels (second sliding means)
  32 Horizontal actuation mechanism
  33 Crank actuator
  34 Main crank mechanism( Crank mechanism )
  35 Collaborative crank mechanism
  36 First servo motor (first drive motor)
  46 Opening and closing operation mechanism
  56 Rail member
  61 Rotating mechanism
  65 Second servo motor (second drive motor)
  M Package
  F Tubular film

Claims (5)

Opposing up and down across the transfer path of the tubular film (F) filled with the article to be packaged (M) and moving in the transfer direction along with the transfer of the tubular film (F) In the end seal device in the horizontal bag making and filling machine that performs end seal before and after sandwiching the packaged object (M) of the tubular film (F) by the pair of moving seal bodies (20, 26),
Said pair of sealing members (20, 26) of the upper and lower operably disposed a seal unit (27), 該機frame by a slide means provided in the machine frame (11) (23) with respect to (11) It is arranged so that it can move horizontally along the film transfer direction ,
The machine frame (11) is connected to a first drive motor (36) and the seal unit (27), and the first drive motor (36) is continuously rotated in a predetermined direction to thereby rotate the seal unit ( 27) the machine frame (the crank mechanism for reciprocating in the horizontal direction with respect to 11) (34), continuously rotating and the second drive motor (65), a second drive motor (65) in a given direction And a rotation mechanism (61) for turning the rail member (56) in a horizontal posture, respectively ,
The pair of seal bodies (20, 26) are configured to be close to and away from each other in the seal unit (27) by an opening / closing operation mechanism (46) linked to the rail member (56) . End seal device for bag filling machine. Opposing up and down across the transfer path of the tubular film (F) filled with the article to be packaged (M) and moving in the transfer direction along with the transfer of the tubular film (F) In the end seal device in the horizontal bag making and filling machine that performs end seal before and after sandwiching the packaged object (M) of the tubular film (F) by the pair of moving seal bodies (20, 26),
A first slide means (23) provided with a pair of moving bodies (16, 16) spaced apart in the width direction of the machine frame (11) and arranged to be horizontally movable along the film transfer direction ;
A seal unit (27) provided on the movable body (16, 16) , wherein the pair of seal bodies (20, 26) are arranged to be vertically movable;
The second slide means (28, 30) provided in the machine frame (11) allows the gap between the pair of moving bodies (16, 16) below the opening / closing position of the pair of seal bodies (20, 26). Balance weight (29) arranged to be horizontally movable,
Reciprocating the movable body (16, 16) in the horizontal direction with the main crank mechanism (34),
A cooperative crank mechanism (35) that operates integrally with the main crank mechanism (34) to reciprocate the balance weight (29) in the horizontal direction;
Disposed in the machine frame (11), the servo motor before carboxymethyl over Ruyunitto (27) and a balance weight (29) for driving the two crank mechanisms (34, 35) so as to horizontally move in opposite symmetrical direction ( 36) and an end seal device in a horizontal bag making and filling machine.   The machine frame (11) comprises a fixed machine frame (12) and a movable machine frame (13) disposed on the fixed machine frame (12) so that the height thereof can be adjusted, and the slide means (23, 28, 30) An end seal device for a horizontal bag making and filling machine according to claim 1 or 2, wherein 30) is disposed on the movable machine frame (13).   The balance weight (29) is configured to be detachable and replaceable so as to have a mass corresponding to the mass including the seal unit (27) and a member interlocking in the same direction in relation to the horizontal movement of the seal unit (27). The end seal device in the horizontal bag making and filling machine according to claim 2. It said main crank mechanism (34) is composed of the cooperating crank mechanism the two moving bodies definitive on both sides (35) a pair of crank actuation part connected to each of the (16, 16) (33, 33) according Item 5. An end seal device for a horizontal bag making and filling machine according to Item 2 or 4.

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