JP4497363B2 - End seal device for horizontal bag making and filling machine - Google Patents

Description

  The present invention relates to an end seal device employed in a horizontal bag making and filling machine.

  In a horizontal bag making and filling machine (= packaging machine), a package is sequentially supplied into a cylindrical film that is horizontally transferred while being formed into a cylindrical shape by a bag making machine, and a longitudinal edge of the cylindrical film. A so-called pillow package can be manufactured by applying a center seal to the overlapped surface of each part and further performing end sealing and cutting before and after sandwiching the tubular film package. When the operation is stopped in the packaging machine, it is preferable that the operation is stopped at a position where the article to be packaged is transferred from the supply conveyor to the tubular film. Accordingly, it is possible to prevent the occurrence of a situation in which the packaging object is not supplied from the supply conveyor to the tubular film at regular intervals by the operation when the packaging machine is stopped or when starting after the stop.

  In addition, when the packaging machine is stopped, it is preferable that the pair of seal bodies in the end seal device that applies the end seal to the tubular film is set to a timing that stops at a position that does not contact the film. Thereby, at the time of a stop, a favorable packaging body can be obtained, without receiving a heat influence from the heated sealing body and melt | dissolving a film.

  However, in the packaging machine, the mechanical dimensions from the position where the article to be packaged is transferred from the supply conveyor to the cylindrical film to the end seal device are constant, and therefore correspond to the set film length for one package. Depending on the end seal interval of the cylindrical film, the sealing body stop position when the packaging machine is stopped due to the relationship between the supply position of the packaged object and the operating position of the sealing body, such as the position in contact with the film, etc. It may stop at a position where the heat of the body adversely affects the film.

  In order to cope with this, for example, the technique proposed in Patent Document 1 temporarily stops the supply of the film when the supply of the package to be supplied to the cylindrical film is interrupted at predetermined intervals. In addition, the end seal device is also stopped, and when it is determined that the stop timing of the end seal device coincides with the timing of engagement of the rotary seal body, the entire end seal device is The seal body stops at the engagement position by changing the distance from the position where the package is delivered from the supply conveyor to the engagement position of the seal body and rotating the seal body by a predetermined angle. It is set not to.

In addition, in the end seal apparatus of a packaging machine, a box motion type thing may be employ | adopted for the objective of improving the sealing performance of a package body at the time of sealing. The box motion type end seal device includes drive means for opening and closing the seal body and drive means for horizontally moving the seal body in the front-rear direction, and horizontally moving and opening and closing the seal body independently. For example, Patent Document 2 discloses a configuration adopted.
Japanese Utility Model Publication No. 3-29408 JP 7-291234 A

  As disclosed in Patent Document 2, in the box motion type end seal device that performs each operation of the seal body independently, when the technique described in Patent Document 1 is applied, each box motion type drive It is necessary to separately provide a mechanism for moving the entire seal unit including the portion, which causes problems such as a complicated configuration and increased apparatus cost.

  That is, the present invention has been proposed in order to suitably solve these problems inherent in the end seal device in the horizontal bag making and filling machine according to the conventional technology described above, and has a horizontal configuration with a simple configuration. It is an object of the present invention to provide an end seal device in a horizontal type bag making and filling machine capable of preventing the heat effect of a sealing body from exerting on a film when the bag making and filling machine is stopped.

In order to solve the above-described problems and achieve the intended purpose, the end seal device in the horizontal bag making and filling machine according to the present invention is:
Opposite vertically across the transfer path of the cylindrical film that has supplied the packaged material from the supply conveyor, and mesh with each other on the upstream side in the film transfer direction , and downstream with the transfer of the cylindrical film in this meshing state End seal in a horizontal bag making and filling machine that performs end sealing at a predetermined cut pitch before and after sandwiching the packaged article of the tubular film by a pair of seal bodies that move to the upstream side away from each other In the device
The pair of seal bodies are arranged so as to be opened and closed up and down, and are guided by a slide guide and arranged so as to be horizontally movable along the film transfer direction;
A horizontal operating mechanism for reciprocating the seal unit in the horizontal direction using a first servo motor as a drive source;
An opening / closing operation mechanism that opens and closes the pair of seal bodies using the second servo motor as a drive source in synchronism with the reciprocating movement of the seal unit so that the pair of seal bodies are in the most disengaged open position at the horizontal movement center of the seal unit. When,
From the relationship between the horizontally movable position of the seal unit which transfer has been completed the material to be packaged from the data value and the supply conveyor to the tubular film about the cutting pitch, the water of the seal unit in the horizontal operation mechanism Rights A control device for determining the moving center,
Based on the horizontal movement center obtained by the control device, the first servo motor and the second servo motor are driven synchronously, and when the horizontal bag making and filling machine stops, the cylindrical film is fed from the supply conveyor. wherein the delivery of the packaged articles is stopped at the completion position, and was adapted to stop the pair of sealing members in an open position with no thermal influence on a film.

According to the end seal device in the horizontal bag making and filling machine according to the invention of claim 1, the horizontal movement center with respect to the horizontal movement distance given to the seal unit according to the cut pitch of the film is determined from the data value set with respect to the cut pitch. The control device obtains the seal unit within the horizontally movable range, and synchronously drives the first servo motor of the horizontal operation mechanism and the second servo motor of the opening / closing operation mechanism based on the horizontal movement center obtained according to the cut pitch. Because it is configured, without adopting a configuration in which a mechanism for moving the entire unit is separately provided , when the horizontal bag making and filling machine is stopped , the sealing body is located at the position where the delivery of the package from the supply conveyor to the tubular film is completed. There can always be stopped at a position where the open state does not give thermal influence to the film, the horizontal bag-making filling machine The operation at the time of stopping or at the start of starting after stopping can prevent the occurrence of the situation that the packaged object is not supplied from the supply conveyor to the cylindrical film at regular intervals, and the film does not melt. A good package is obtained.

According to the end seal device of claim 2, from the relationship between the arrangement position of the limit sensor for detecting the horizontal movement limit position of the seal unit and the position where the delivery of the article to be packaged from the supply conveyor to the tubular film is completed. Since the horizontal movement center of the seal unit is automatically set, an operation for setting the horizontal movement center becomes unnecessary. According to the end seal device of the third aspect, since the horizontal movement distance of the seal unit can be arbitrarily set, it becomes possible to perform an optimal seal according to the packaging material or other film material that requires a sealing property. According to the end seal device of the fourth aspect, the horizontal movement center of the seal unit can be automatically set only by inputting the data value relating to the cut pitch and the data value relating to the height of the package.

According to the end seal device of the fifth aspect, since the seal unit is horizontally moved using the ball screw rotated forward and backward by the first servo motor, the change of the horizontal movement distance and the reciprocation of the seal unit are lightly loaded. Can be carried out with high accuracy. According to the end seal device of the sixth aspect, when the horizontal bag making and filling machine is stopped, the pair of seal bodies are stopped at the open positions that are the most spaced apart from each other, so that the thermal influence on the film can be reliably suppressed.

According to the end seal device of the seventh aspect, since the second servo motor of the opening / closing operation mechanism is provided separately from the horizontal moving portion of the seal unit, it is possible to suppress the occurrence of vibration during the high speed operation of the seal unit, The load on the second servo motor can be reduced. According to the end sealing apparatus of claim 8, horizontal movement center of the sealing unit, since you set stored for each packaging varieties, very easily can respond when breeds switching becomes unnecessary setting operation to change each time the type switching is It becomes.

  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.

  FIG. 1 shows an overall configuration of an end seal device in a horizontal bag making and filling machine according to an embodiment of the present invention. A belt-like film fed from a supply source on the upstream side of the end seal device 10 is made into a bag. To the cylindrical film F formed by the means, the articles to be packaged M are supplied from the supply conveyor K at predetermined intervals, and the center seal is continuously applied. And the cylindrical film F with which the to-be-packaged object M was filled with the predetermined space | interval is transferred to the said end seal apparatus 10, and an end seal is given before and after pinching the to-be-packaged object M in the cylindrical film F. Is done.

  As shown in FIG. 2, the machine frame 11 of the end seal device 10 is spaced apart from the film transfer path to the side (one side in the width direction intersecting the film transfer direction), and is a fixed machine formed in a rectangular frame shape. The frame 12 and a movable machine frame (machine frame) 13 disposed so as to move up and down in parallel with the fixed machine frame 12, and the movable machine frame 13 includes a height adjusting means 75 described later. The height can be adjusted via.

  A pair of slide guides 14, 14 extending horizontally in the film transfer direction are disposed on one side of the movable machine frame 13 on the side of the film transfer path so as to be spaced apart in parallel in the vertical direction. , 14, a seal frame 15 in a seal unit 29 described later is slidably disposed. The seal frame 15 includes a pair of side plates 16 and 17 that are spaced apart in the width direction, and a pair of connecting plates 18 and 19 that are installed between the side plates 16 and 17 and are spaced apart from each other. Sliding members 20 that are slidably engaged with the slide guides 14 are disposed on the outer surface of the opposing one side plate 17 so as to be spaced apart from each other.

  As shown in FIG. 2, a pair of slide shafts 21 and 21 having a predetermined length are inserted into and supported by the pair of connecting plates 18 and 19 so as to be slidable in the vertical direction. The lower ends of the pair of slide shafts 21, 21 extending downward from the connecting plate 19 are connected by the first support member 22, and extend upward from the upper connecting plate 18 to face upward from the film transport path. The upper end portions of both slide shafts 21 and 21 are connected by an upper holding member 23. Below the upper holding member 23, a first seal body 24 whose seal surface is directed to the transfer path of the tubular film F is disposed so as to be movable up and down. The first seal body 24 is always urged downward by springs 25 and 25 as elastic members, and the first seal body 24 and a second seal body to be described later are applied by the springs 25 and 25. 28 functions to hold the tubular film F at a predetermined pressure. Further, the first seal body 24 is provided with a cutter 26 and is configured to cut the tubular film F when engaged with the second seal body 28.

  A second support member 27 parallel to the first support member 22 is disposed on the slide shafts 21 between the upper connecting plate 18 and the upper holding member 23 so as to be movable up and down. 22 and the second support member 27 can move close to and away from each other. On the upper surface of the second support member 27, a second seal body 28 that faces the first seal body 24 in parallel with the film transport path in between is oriented with the seal surface directed to the film transport path. It is arranged. Then, by operating an opening / closing operation mechanism 50 to be described later, the upper and lower sealing bodies 24 and 28 move toward and away from each other, and engage with the tubular film F while being close to the upper and lower sealing bodies 24 and 28. It is configured to provide an end seal under pressure. A seal unit 29 including upper and lower seal bodies 24 and 28, slide shafts 21 and 21, first and second support members 22 and 27, spring 25, cutter 26, and seal frame 15 is a horizontal operation mechanism 30 described later. Is moved horizontally along the pair of slide guides 14 and 14 in the film transport direction.

  As shown in FIG. 3 or FIG. 4, the horizontal operation mechanism 30 disposed in the movable machine frame 13 is rotatable to a pair of bearings 31, 31 disposed in the movable machine frame 13 and spaced apart in the film transfer direction. A screw shaft 32a of a ball screw 32 that is pivotally supported by the shaft and extends parallel to the film transfer direction, a first servomotor 33 as a drive motor capable of rotating forward and reverse, and the seal unit 29. And a ball screw nut 34 as a female screw body screwed into the screw shaft 32a, and the first servo motor 33 is rotated by a control device 35. Be controlled. The first servo motor 33 is connected to the screw shaft 32a via a transmission means 36 composed of a pulley and an endless belt. By rotating the first servo motor 33 forward and backward, a female screw hole of the ball screw nut 34 is provided. The seal unit 29 is horizontally moved forward and backward in the film transfer direction under the screwing action of the screw shaft 32a.

  A pair of limit sensors 37 and 38 capable of detecting the movement position of the ball screw nut 34 are disposed in the movable machine frame 13 apart from each other in the film transfer direction as shown in FIG. 29 is set so that it can move horizontally within a horizontally movable range between the pair of limit sensors 37 and 38. An origin sensor 39 capable of detecting the moving position of the ball screw nut 34 is disposed at an intermediate position where both limit sensors 37 and 38 are disposed.

  As shown in FIG. 5, the control device 35 has a storage means 40 for storing various setting data and an arithmetic means 41, and an input means 42 such as a touch panel capable of data setting by data input or item selection is connected. In addition to various control data for driving and controlling the packaging machine by the input means 42, the film length (cut pitch) corresponding to one packaging length, the packaging speed, the height of the article to be packaged M, And predetermined data values relating to the horizontal movement distance can be input. These various data values (input values) input by the input means 42 can be stored in the storage means 40 for each item of the packaged goods M and other packaging varieties. The data value set previously is read out from the storage means 40 and automatically set. For the input of the product setting, it is possible to input an actual product name via the input means 42 or a method of inputting a product number or the like previously assigned to each product. Then, the control device 35 drives the first servo motor 33 in the horizontal operation mechanism 30 that performs the horizontal movement of the seal unit 29, the second servo motor 66 in the opening / closing operation mechanism 50 that performs the opening / closing operation, and the supply conveyor K. The third servo motor 43 and the fourth servo motor 44 for driving the film transfer mechanism are set to be driven and controlled in synchronization. Further, when stopping (pausing) the packaging machine, the control device 35 is in a position where the delivery of the article to be packaged M from the supply conveyor K to the tubular film F is completed, and the seal unit 29 is at the center of the horizontal movement. The pair of seal bodies 24, 28 that are opened and closed by the opening / closing operation mechanism 50 in synchronism with the horizontal movement of the seal unit 29 are stopped and the most spaced apart opening corresponding to the position of the horizontal movement center of the seal unit 29. The motors 43, 44, 33, and 66 are set to stop control at the timing of stopping at the position. When the movement position of the ball screw nut 34 is detected by the origin sensor 39, an origin position signal at the horizontal operation position of the seal unit 29 horizontally moved by the horizontal operation mechanism 30 is input to the controller 35, and The horizontal movement current position of the seal unit 29 can be recognized by a pulse transmitted from an encoder attached to one servo motor 33.

  Further, in the control device 35, when the packaging machine is stopped at the position where the delivery of the article to be packaged M from the supply conveyor K to the tubular film F is completed as described above, the sealing bodies 24, 28 by the opening / closing operation mechanism 50 are stopped. The seal unit 29 can be moved horizontally from the data value related to the cut pitch (P) and the data value related to the horizontal movement distance (X1) input by the input means 42 so that the open / close position is the most distantly open position. The position (Xc) of the horizontal movement center within the range is calculated and determined as follows.

  In this embodiment, as described later, the opening / closing operation of the sealing bodies 24, 28 by the opening / closing operation mechanism 50 is performed at a constant speed, and the cylindrical film F is set to be transferred at a constant speed. As shown in FIG. 6, when the packaging machine is stopped, the seal bodies 24 and 28 are most separated from each other between the transfer position of the film F, the open / close position of the seal bodies 24 and 28, and the horizontal movement position of the seal unit 29. The position (Xc) of the horizontal movement center of the seal unit 29 in the open position is such that the operation cycle of the seal bodies 24 and 28 is 1 after the seal bodies 24 and 28 are sealed and cut at the most downstream position of the tubular film F. After the lapse of / 2 cycles, the position is horizontally moved upstream by 1/2 actual packaging length (1/2 of the total length of the resulting package) in the tubular film F. From this, the length with which the tubular film F is drawn out to the downstream end is the horizontal value of the sealing bodies 24 and 28 from the delivery position of the packaged article M to the tubular film F, which is a known value. Obtain a divisor of “(L1 + X) / P” in the ratio of the distance (X) of the horizontal movable range to the distance (L1) to the upstream end of the movable range and the cut pitch (P). The position (Xc) of the horizontal movement center of the seal unit 29 obtained when the height of the package F is not taken into consideration is moved upstream by “P / 2” from the position of the obtained film downstream end. It becomes the position.

  However, when sealing the cylindrical film F with the sealing bodies 24 and 28 in the middle of the next packaged article M, the cylindrical film F is squeezed by a predetermined amount to correspond to the height of the packaged article M. Since the total length to the downstream end of the tubular film F is shortened, it is necessary to advance the timing of the next sealing body 24, 28, and the data relating to the height dimension of the article M to be packaged input by the input means 42. With respect to the shrinkage ratio of the tubular film F obtained from the values, the position (Xc) of the horizontal movement center needs to be a position displaced upstream.

  Furthermore, the position (Xc) of the horizontal movement center is a horizontal movement based on a position corresponding to the distance (L1) from the delivery position of the package M to the tubular film F to the upstream end of the horizontal movable range. The distance between the downstream end of the possible range (X) and the horizontal movement distance (X1) of the seal unit 29 is a position that can move. That is, the position of the horizontal movement center to be obtained (Xc) needs to be obtained as a position where the range in which the seal unit 29 moves horizontally is not outside the horizontally movable range in relation to the horizontal movement distance (X1). Therefore, the relationship between the distance (L2) from the upstream end of the horizontal movable range to the position (Xc) of the horizontal movement center satisfies the condition “L2 ≧ X1 / 2”, and the height of the packaged object M is high. Finally, the position (Xc) of the horizontal movement center is determined so that the position is considered. Actually, these values are taken into account from the beginning instead of step by step when calculating whether the height of the article to be packaged M is not taken into consideration, and whether it is out of the horizontally movable range. The position (Xc) of the horizontal movement center is obtained by the calculated formula.

  Note that the data value relating to the height of the article to be packaged M in the above calculation is input by the input means 42 and stored in the storage means 40 for each packaging type. In this case, the error range in the operation of the seal bodies 24 and 28 or the film transfer mechanism can be obtained without giving as a data value in particular, and the value input by the input means 42 is stored as necessary, It does not necessarily have to be cited as a data value for the calculation for obtaining the position of the horizontal movement center described above. In addition, when a plurality of types of articles to be packaged M having different heights are not packaged, for example, when only one item is packaged, there is no need to change the data value relating to the height, the program is set in advance. It may be a thing.

  Based on the calculation result, the control device 35 rotates the second servo motor 66 of the opening / closing operation mechanism 50 by a predetermined amount to move to the open position where the pair of seal bodies 24, 28 are most separated from each other, and the horizontal operation mechanism 30. By rotating the first servo motor 33 by a predetermined amount, the seal unit 29 is moved horizontally to a position moved downstream by a predetermined distance from the origin position to the position (Xc) of the obtained horizontal movement center. To position. That is, the rotation speed and the rotation direction are detected by a pulse transmitted from the encoder attached to the first servomotor 33, and the first servomotor 33 is rotationally controlled by the control device 35 based on the pulse signal. The seal unit 29 is positioned at the horizontal movement center (Xc). Then, the seal unit 29 is set to reciprocate at a horizontal movement distance (X1) corresponding to the data value input by the input means 42 at that position.

  As shown in FIG. 2, a mounting plate 45 is disposed between the upper and lower connecting plates 18 and 19 in the seal frame 15, and one side plate 17 on which the mounting plate 45 and the sliding member 20 are disposed, An operating shaft 46 extending in the width direction is pivotally supported. An operating member 47 is disposed at one end of the operating shaft 46 protruding from the mounting plate 45 so as to be integrally rotatable. Then, the other end portion of the first operating rod 48 whose one end portion is rotatably connected to the end portion extending in one radial direction from the operating shaft 46 in the operating member 47 rotates around the first support member 22. It is connected freely. In addition, one end of the operating member 47 is rotatably connected to a position that extends in the other radial direction from the operating shaft 46 and is 180 degrees out of phase with the pivotal position of the first operating rod 48 in the circumferential direction. The other end of the second operating rod 49 is pivotally connected to the second support member 27. That is, when the actuating member 47 is rotated in the forward and reverse directions within a predetermined angle range by the rotation mechanism 62 described later, the first support member 22 and the second support member 27 are caused by the crank movement of both actuating rods 48 and 49. Are moved toward and away from each other, and accordingly, the upper and lower seal bodies 24 and 28 are moved toward and away from each other across the film transport path. In the embodiment, the seal bodies 24, 28 are opened and closed from the first operating rod 48, the second operating rod 49, the operating member 47, the operating shaft 46, the rotating mechanism 62, and the second servo motor 66 that operates the rotating mechanism 62. An opening / closing operation mechanism 50 is configured. In addition, one end of the working material 51 is connected to an end portion of the working shaft 46 that protrudes outward (from the movable machine frame side) from one side plate 17 so as to integrally rotate, and the other end of the working material 51 A follower 52 is pivotally supported.

  As shown in FIG. 3, a mounting frame 53 is disposed inside the movable machine frame 13, and a pair of drive shafts 54, 55 extending horizontally across the film transport direction are mounted on the mounting frame 53. It is spaced apart from the front and rear and is rotatably arranged. The first spur gear 56 is disposed so as to rotate integrally with the inner end (the end on the film transfer path side) of the first drive shaft 54 on the downstream side, and the inner end of the second drive shaft 55 on the upstream side. One end of the support member 57 is connected to the part so as to rotate integrally. One end of the first spur gear 56 is pivotally connected to the eccentric position, and the other end of the rail member 58 extending forward and backward is pivotally connected to the other end of the support member 57, and the rail. The member 58 is always held in a horizontal posture. As shown in FIG. 4, the rail member 58 is formed with a long hole 58a extending in the front-rear direction, and the follower 52 pivotally supported by the operating member 51 faces in the long hole 58a so as to be able to roll. Yes. Further, the first linkage 59 is disposed to rotate integrally with the outer end portion of the first drive shaft 54, and the second linkage 60 rotates integrally with the outer end portion of the second drive shaft 55. The connecting member 61 is rotatably connected between one end portions of the first and second connecting rods 59, 60 extending in the radial direction from the drive shafts 54, 55. That is, in the embodiment, the rotation mechanism 62 is constituted by the first spur gear 56, the support member 57, the first linkage 59, the second linkage 60, the linkage member 61, and the rail member 58, and the rotation mechanism 62 will be described later. The second servo motor 66 is operated.

  A pivot shaft 63 is pivotally supported on the mounting frame 53 at a position below the first drive shaft 54, and is arranged to rotate integrally with an inner end portion of the pivot shaft 63. The second spur gear 64 meshes with the first spur gear 56. The pivot shaft 63 is connected to a second servo motor 66 as a driving means disposed on the mounting frame 53 via a transmission means 65 comprising a pulley and an endless belt, and the motor 66 is continuously rotated in a fixed direction. Thus, the first spur gear 56 meshed with the second spur gear 64 is configured to rotate in a certain direction. As the first spur gear 56 rotates, the support member 57 rotates in the same direction via the connecting member 61, the second connecting rod 60, and the second drive shaft 55, and the rail member 58 maintains a horizontal posture. It is comprised so that turning motion may be performed. As a result, the operating member 51, the operating shaft 46 and the operating member 47 are rotated in the forward and reverse directions within a predetermined angle range via the follower 52 engaged with the elongated hole 58 a of the rail member 58. The first support member 22 and the second support member 27 connected via the first and second operating rods 48 and 49 move toward and away from each other. As a result, the upper and lower seal bodies 24 and 28 move to each other. It is designed to move close and separate (up and down). Further, the opening / closing operation mechanism 50 controls the rotation of the second servo motor 66 at a constant speed, so that the first seal body 24 and the second seal body 28 are the longest in the horizontal movement distance of the seal unit 29 set in advance. It is set so that it can be brought close to each other at a predetermined timing during the movement from the upstream side to the downstream side, and can be separated from each other at a predetermined timing until it moves to the most downstream side.

  That is, in the embodiment, the first servomotor 33 is rotated forward and backward and the second servomotor 66 is continuously rotated in a certain direction, whereby the horizontal operation mechanism 30 and the opening / closing operation mechanism 50 operate in synchronism with each other. The first seal body 24 and the second seal body 28 mesh closely with each other on the upstream side in the film transfer direction, move horizontally downstream in this meshing state, and then move away from each other and horizontally move upstream. Repeat the moving motion (box motion). The moving speed in the film transport direction when the seal bodies 24 and 28 are engaged is set so that the first servo motor 33 is rotationally controlled so as to be substantially the same speed as the film transport speed. In addition, the first servomotor 33 responds to the transfer speed of the tubular film F obtained from the cut pitch of the film set corresponding to the size of the article to be packaged M, the desired packaging speed, and the set packaging speed. The control device 35 is set so that the speed is controlled, and the speed value of the second servo motor 66 is changed by the control device 35 according to the set packaging speed.

  As shown in FIG. 4, an adjustment shaft 67 is pivotally supported on the upper portion of the fixed machine frame 12. The adjustment shaft 67 is separated from the adjustment shaft 67 in the axial direction, and a pair of first helical gears 68, 68 is disposed so as to be integrally rotatable. In addition, a second helical gear 69 that meshes with each first helical gear 68 is pivotally supported on the stationary machine frame 12, and an adjusting screw 70 that extends in the vertical direction is provided on each second helical gear 69. The adjusting screws 70 are screwed into female screw holes formed in a support member 71 provided at a corresponding position of the movable machine frame 13. The adjusting shaft 67 is connected to an adjusting motor 74 disposed on the stationary machine frame 12 via a bracket 73 via a transmission means 72 composed of a pulley and an endless belt, and rotates the motor 74 in the forward and reverse directions. Thus, the movable machine frame 13 moves in the vertical direction with respect to the fixed machine frame 12 under the screwing action of the adjusting screw means including the adjusting screw 70 and the female screw hole. As a result, the height position where the pair of seal bodies 24 and 28 mesh can be adjusted according to the height of the article to be packaged M transferred by transfer conveyors 76 and 77 to be described later. The supporting member 71, the female screw hole, the adjusting screw 70 and the adjusting shaft 67 constitute a height adjusting means 75.

  As shown in FIG. 1, a first transfer conveyor 76 and a second transfer conveyor 77 having the same transfer level are arranged in series on the upstream side and the downstream side in the film transfer direction across the seal unit 29 in the end seal device 10. It is arranged. In addition, since the structure of both the transfer conveyors 76 and 77 is substantially symmetrical, only the structure of the 1st transfer conveyor 76 is demonstrated and suppose that the same code | symbol is attached | subjected and shown to the same member of the 2nd transfer conveyor 77.

  In other words, the first transfer conveyor 76 disposed on the upstream side can be horizontally moved in the film transfer direction inside the fixed frame 78 disposed in the fixed frame 12 and facing the film transfer path. And a moving frame 79 disposed on the surface. Further, a plurality of pulleys 80 are rotatably supported on the fixed frame 78 and the moving frame 79, and an endless belt 81 is wound around these pulleys 80 so as to be able to travel, thereby forming a first transfer conveyor 76. Is driven by a motor (not shown).

  In the first transfer conveyor 76, the endless belt 81 is set so as to run at substantially the same speed as the film transfer speed, and the tubular film F filled with an article M to be packaged placed on the endless belt 81. Is transferred toward the seal unit 29. Further, in the second transfer conveyor 77, the endless belt 81 is set to be higher than the traveling speed of the endless belt 81 in the first transfer conveyor 76, and end sealing / cutting is performed by both seal bodies 24, 28 of the seal unit 29. It is configured so that the preceding preceding package body can be reliably separated from the subsequent unpackaged body and discharged.

  As shown in FIG. 1, first cam plates 82 formed with first cam grooves 82 a are respectively disposed on the left and right sides in the width direction near the downstream end portion of the moving frame 79 of the first transfer conveyor 76. In addition, second cam plates 83 having second cam grooves 83a are disposed on the left and right sides in the width direction near the upstream end of the moving frame 79 of the second transfer conveyor 77, respectively. The first cam groove 82a and the second cam groove 83a formed in the first cam plate 82 and the second cam plate 83 located in the front and rear of the film transfer direction across the second seal body 28 are shown in FIG. As shown in FIG. A first roller 85 pivotally supported by a holding member 84 disposed on the second support member 27 is engaged with the first cam groove 82a in a rollable manner, and the second cam groove 83a. The second roller 86 that is also pivotally supported by the holding member 84 is engaged so as to be able to roll.

  The shape of the first and second cam grooves 82a and 83a is such that the opposite end portions of the transfer conveyors 76 and 77 are moved in accordance with the horizontal movement of the seal unit 29 and the opening / closing operation of the pair of seal bodies 24 and 28. It is set so as to move forward and backward along the transfer direction and to approach and separate from each other. That is, as shown in FIG. 1, in the state where the second seal body 28 is located at the lowest point, the opposing ends of the two moving frames 79, 79 are close to each other, so that the opposing ends of the two transfer conveyors 76, 77 are opposed to each other. The parts to be packed M supplied in the cylindrical film F in close proximity to each other are transferred from the first transfer conveyor 76 to the second transfer conveyor 77, and the holding material 84 is raised as the second seal body 28 is moved upward. Then, the opposing end portions of both moving frames 79 and 79 are separated from each other, whereby the opposing end portions of both transfer conveyors 76 and 77 are separated to form a gap that allows the second seal body 28 to move upward. It is configured as follows.

(Effects of Example)
Next, the operation of the end seal device according to the embodiment will be described. Prior to the start of operation of the packaging machine, various data for driving and controlling the packaging machine via the input means 42, the cut pitch, the height of the package M, the horizontal movement distance of the seal unit 29, etc. A predetermined data value for controlling the sealing device 10 is input. With respect to the horizontal movement center of the seal unit 29, the upstream limit position (upstream limit sensor 38) of the horizontal movement range of the seal unit 29 from the delivery position of the package M from the supply conveyor K to the tubular film F. Is calculated by the calculation means 41 of the control device 35 on the basis of the distance (L1) up to and the data values relating to the height and cut pitch of the article M input by the input means 42. Various data values and operation values input by the input unit 42 are set and stored in the storage unit 40 corresponding to each package type determined by the type setting operation by the input unit 42. And the synchronous alignment operation | movement of a packaging machine is implemented based on the data value set corresponding to the to-be-packaged goods M used as packaging object. That is, by the operation of the operation switch by the operator, first, the second servo motor 66 of the opening / closing operation mechanism 50 is rotationally driven at a low speed, and the pair of seal bodies 24, 28 are positioned at the most distantly opened positions. After the first servo motor 33 of the horizontal operation mechanism 30 of the end seal device 10 is rotated at a low speed and the movement position of the ball screw nut 34 is detected by the origin sensor 39, the seal unit 29 is placed at the obtained horizontal movement center position. Until it is positioned. Next, the third servo motor 43 and the fourth servo motor 44 are respectively controlled to rotate at a low speed, and are stopped at the timing when the delivery of the article M to the cylindrical film F is completed.

When the operation of the packaging machine is started after the above-described synchronous alignment operation is completed, the package M supplied in the tubular film F includes the endless belt 81 that travels at the same speed as the film transfer speed. It is transferred downstream by the first transfer conveyor 76. In the end seal device 10, the horizontal operation mechanism 30 and the opening / closing operation mechanism 50 are operated at a required timing by the forward / reverse rotation of the first servo motor 33 and the continuous rotation of the second servo motor 66 in a certain direction, and the first seal motor 10 is operated. The body 24 and the second seal body 28 move upstream and approach each other at an appropriate timing. That is, the seal unit 29 moves upstream along the slide guides 14 and 14 under the screwing action of the screw shaft 32a rotated in the normal rotation direction by the first servomotor 33 and the ball screw nut 34. Further, the operating member 47 rotated through the rotating mechanism 62 operated by the second servo motor 66 rotates counterclockwise in FIG. 1, so that the operating member 47 and the first and second support members are supported. Due to the crank movement of the first and second operating rods 48 and 49 connecting the members 22 and 27, the first seal body 24 and the second seal body 28 move to the most upstream side and then to the downstream side. predetermined Timing in g while moving mutually closer move. The opposing end portions of the first and second transfer conveyors 76 and 77 move away from each other in conjunction with the movement of the second seal body 28, and allow the second seal body 28 to extend upward. Define the gap.

  The pair of seal bodies 24, 28 sandwiching the tubular film F is moved horizontally by a required distance downstream as the tubular film F is transferred by the operation of the horizontal operation mechanism 30 of the seal unit 29, Further, the tubular film F is held by the operation of the opening / closing operation mechanism 50, whereby end sealing and cutting are performed. During the horizontal movement of the seal bodies 24 and 28 to the downstream side, the transfer conveyors 76 and 77 have a required gap between the opposed ends without the seal bodies 24 and 28 interfering with each other. It moves horizontally downstream while being held.

  When the first seal body 24 and the second seal body 28 are separated from each other at a predetermined timing moved downstream by the operation of the horizontal operation mechanism 30 and the closing / closing operation mechanism 50, the package is subjected to end sealing and cutting. The body is quickly transferred to the downstream side from the arrangement position of the end seal device 10 by the second transfer conveyor 77 operating at high speed. In addition, the opposing end portions of the first and second transfer conveyors 76 and 77 are close to each other in conjunction with the opening operation of the pair of seal bodies 24 and 28, so that the first transfer conveyor 76 of the next article M to be packaged Delivery to the second transfer conveyor 77 is performed smoothly.

  As described above, the horizontal operation mechanism 30 that horizontally moves the seal unit 29 and the opening / closing operation mechanism 50 that opens and closes both the seal bodies 24 and 28 are configured to be operated by the corresponding individual servo motors 33 and 66. From the horizontal movement of the sealing bodies 24, 28, the moving speed of the sealing bodies 24, 28 accompanying the up / down opening / closing operation and the period during which the sealing bodies 24, 28 hold the tubular film F are arbitrary values. And can easily cope with various packaging conditions. Further, since the second servo motor 66 of the opening / closing operation mechanism 50 is disposed in the movable machine frame 13 different from the horizontally moving seal unit 29, it is possible to suppress the generation of vibration during reciprocating movement and to operate horizontally. The load on the first servo motor 33 of the mechanism 30 can be reduced to cope with the higher speed.

  When the packaging machine stops operation, the supply conveyor K, the film transfer mechanism, the horizontal operation of the end seal device 10, and the open / close operation mechanisms 30 and 50 are operated synchronously. It is positioned and stopped at the position where the delivery of the article to be packaged M is completed. Further, the seal unit 29 in the end seal device 10 is positioned at the horizontal movement center of the set horizontal movement distance, and the pair of seal bodies 24 and 28 stops at the open position that is most separated in the vertical direction. In other words, the sealing bodies 24 and 28 are always stopped at a position where there is no thermal influence on the film. Note that the driving of the end seal device 10 is stopped as described in Japanese Patent Application Laid-Open No. H10-28400. When the supply of the article M to be packaged from the supply conveyor K stops, the film feed is temporarily stopped and the end seal device 10 is activated. When stopping the operation, the same stop position as described above can be used.

  Next, in the case where the cut pitch or the height of the packaged object M or both values are different from the conventional size due to the order change or the like, a predetermined data value is input by the input means 42, and the input value and the The calculated value is set and stored in the storage means 40 by the type setting operation for the type. Accordingly, when the packaging machine is stopped at the position where the article to be packaged M is transferred from the supply conveyor K to the tubular film F by performing the synchronous positioning operation of the packaging machine as described above, the sealing body Within the horizontally movable range of the seal unit 29, the horizontal movement center, which is the center position of the newly set horizontal movement distance, is moved back and forth so that 24 and 28 are the open positions that are the farthest apart vertically. . Specifically, the movement amount from the origin position where the movement position of the ball screw nut 34 is detected by the origin sensor 39 to the horizontal movement center is changed. That is, it is not necessary to move the entire device including the horizontal operation mechanism 30 and the opening / closing operation mechanism 50 in the end seal device 10 back and forth in the film transfer direction, and it is not necessary to employ a mechanism for the movement. With a simple configuration, the sealing bodies 24 and 28 can be stopped in the open position when the packaging machine is stopped.

  Since the ball screw 32 that rotates forward and backward by the first servomotor 33 is used as the horizontal operation mechanism 30, the horizontal operation of the seal unit 29 and the adjustment of the position of the horizontal movement center within the horizontally movable range are lightly loaded. It can be performed with high accuracy.

  Further, when the height dimension of the article to be packaged M changes due to an order change or the like, the adjusting motor 74 is rotated in a required direction so that the adjusting screws 70, 70 and the female screw holes are engaged with each other. The height position at which the seal bodies 24 and 28 mesh with each other when the movable machine frame 13 moves vertically up and down with respect to the fixed machine frame 12 is set and adjusted to an intermediate position in the height direction of the packaged article 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.

[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 horizontal movement of the seal unit 29 in which the seal bodies 24 and 28 are arranged is replaced by a ball and screw 32 moving mechanism using a rack and pinion, or a chain or a toothed belt is connected to the seal frame 15 for horizontal operation. Various other operation mechanisms can be adopted as long as they can be set so as to be able to operate horizontally within a part of the horizontally movable range, such as constituting the mechanism 30.
2. The opening / closing operation mechanism 50 is configured to open and close the pair of seal bodies 24 and 28 by continuously rotating the second servo motor 66 in a fixed direction. However, the seal is obtained by rotating the second servo motor 66 forward and backward. Other configurations for opening and closing the bodies 24, 28 may be employed. In this case, since the separation distance due to the opening / closing movement of the seal bodies 24 and 28 can be arbitrarily changed, it is possible to easily cope with the height change of the article M to be packaged.
3. Second servo motor 66 for opening and closing mechanism 50 is not limited to be installed in the movable machine frame 13 which does not move horizontally, but it may also be one that is installed in the sealing unit 29.
4). The setting of the horizontal movement center is automatically set according to the calculated value by the data input. However, the horizontal movement center is set by inputting the data value related to the position of the horizontal movement center, or the horizontal operation mechanism 30 is operated so that the seal unit 29 is used. It may be set by moving in advance to the horizontal movement center .
5). The cut pitch may be obtained from data values that are set with respect to the length and height of the article to be packaged M.
6). Regarding the separation positions of the seal bodies 24 and 28, the most preferable example in the embodiment is the open position that is the most spaced apart in the vertical direction. However, if the film is not affected by the heat of the seal bodies 24 and 28, at least the seal body It is sufficient that the seal bodies 24, 28 are set at a position where they can be stopped when they are not in contact with the film when the operations of the seal units 24, 28 are stopped. Thus, it is not limited to the stopped state.
7). In the embodiment, the movable machine frame 13 is arranged on the fixed machine frame 12 so as to be movable up and down, and the machine frame 11 is configured. However, for models that do not require changing the height position of the end seal, the fixed and movable machine is used. A configuration in which the frames 12 and 13 are integrally formed, and various other configurations can be adopted.

It is a front view which shows the end seal apparatus in the horizontal type bag making filling machine which concerns on the suitable Example of this invention. It is a side view which partially cuts and shows the end seal device concerning an example. It is a top view which partially cuts and shows the end seal apparatus which concerns on an Example. It is a rear view which partially cuts and shows the end seal apparatus which concerns on an Example. It is a main control block diagram of the end seal device concerning an example. It is explanatory drawing which shows the positional relationship of each member for changing the horizontal movement center of the seal unit in the end seal apparatus which concerns on an Example.

Explanation of symbols

14 slide guide, 24 first seal body, 28 second seal body 29 seal unit, 30 horizontal operation mechanism, 32 ball screw, 32a screw shaft 33 first servo motor (drive motor), 35 control device, 42 input means 50 Opening / closing operation mechanism, 66 2nd servo motor (drive means), M Packaged item F Cylindrical film

Claims (8)

The cylindrical film (F) that supplied the package (M) from the supply conveyor (K) faces the upper and lower sides across the transfer path, and meshes closely with each other on the upstream side in the film transfer direction. After moving to the downstream side along with the transfer of the tubular film (F), the packaged object of the tubular film (F) (24, 28) is moved away from each other and moved to the upstream side ( In an end seal device in a horizontal bag making and filling machine that performs end seal at a predetermined cut pitch before and after sandwiching M),
The pair of seal bodies (24, 28) are arranged so as to open and close up and down, and are guided by a slide guide (14) to be arranged so as to be horizontally movable along the film transfer direction; ,
A horizontal operation mechanism (30) for reciprocating the seal unit (29) in the horizontal direction using the first servo motor (33) as a drive source;
In synchronization with the reciprocating movement of the seal unit (29), the second servo motor (66) is moved in such a manner that the pair of seal bodies (24 , 28) are at the most distant open positions at the horizontal movement center of the seal unit (29). An opening / closing operation mechanism (50) for opening / closing the pair of seal bodies (24, 28) as a drive source;
From the relationship between the horizontally movable location of the data value and the supply conveyor about the said cutting pitch to be packaged into the tubular film (F) from (K) position and the sealing unit transfer has been completed (M) (29) comprises the control device for determining the horizontal movement center of the seal unit (29) and (35) in the horizontal actuating mechanism (30),
Based on the horizontal movement centers determined by the control device (35), said first servo motor (33) a second servo motor (66) and synchronization with the drive, when the horizontal-type bag filling machine is stopped Is stopped at the position where the delivery of the package (M) from the supply conveyor (K) to the tubular film (F) is completed , and the pair of sealing bodies (24, 28) has no thermal effect on the film. An end seal device for a horizontal bag making and filling machine, which can be stopped at an open position. The control device (35) includes a position where limit sensors (37, 38) for detecting a horizontal movement limit position of the seal unit (29), and a covering from the supply conveyor (K) to the tubular film (F). The end seal device for a horizontal bag making and filling machine according to claim 1 , wherein the horizontal movement center of the seal unit (29) is automatically set to the position obtained from the relationship with the position where the delivery of the package (M) is completed . The control device (35) receives the data value relating to the horizontal movement distance of the seal unit (29) from the input means (42), and moves the seal unit (29) by a predetermined distance according to the input value . The end seal device for a horizontal bag making and filling machine according to claim 1 or 2, wherein one servo motor (33) is driven and controlled. The control device (35) receives a data value related to the cut pitch and a data value related to the height of the package (M) from the input means (42), and from these data values, the seal unit ( The end seal device in the horizontal bag making and filling machine according to any one of claims 1 to 3, wherein the horizontal movement center of 29) is automatically set to the obtained position. The horizontal actuating mechanism (30) is according to claim 1, wherein the screw shaft by a first servo motor (33) (32a) is configured to a seal unit (29) can be horizontally moved by a ball screw (32) which is forward and reverse rotation The end seal apparatus in the horizontal type bag making filling machine as described in any one of -4. Wherein the control unit (35), upon stopping of the horizontal-type bag filling machine, said seal unit (29) is stopped at a horizontal movement center, a pair of seal members (24, 28) so that is farthest open position The end seal device for a horizontal bag making and filling machine according to any one of claims 1 to 5, wherein the first servo motor (33) and the second servo motor (66) are driven and controlled. The end seal device for a horizontal bag making and filling machine according to any one of claims 1 to 6, wherein the second servo motor (66) is disposed outside a horizontal moving portion of the seal unit (29). Wherein the control unit (35), the end sealing device in horizontal bag filling machine according to horizontal movement center, in any one of claims 1 to 7 to set stored for each packaging varieties of the sealing unit (29) .

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