JP2018127270A - Bag making and packaging machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bag making and packaging machine which is a bag making and packaging machine ultrasonically sealing the edge parts of both sides of a film transported in a molded cylinder shape by aligning the edge parts of both sides, which can suppress defects during transportation of the film without being made into bags and whose cost is low and operability is good.SOLUTION: A bag making and packaging machine 100 has: a transportation mechanism 40 transporting a film molded into cylinder shape by aligning edge parts of both sides; a vertical seal mechanism 50 that has a horn and an anvil in touch of the edge parts of both sides of the transported film so as to wrap up the film, and ultrasonically seals the edge parts of both sides of the film; and a control unit controlling the operation of the transportation mechanism and vertical mechanism. The control unit has as control modes a usual first mode that makes the vertical mechanism perform the ultrasonic sealing while transporting the film, and a second mode that makes the horn vibrate with a smaller amplitude than the amplitude of the horn at the usual first mode while transporting the film.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a bag making and packaging machine, in particular, a horn and an anvil that hit the film so as to sandwich the film against both side edges of the film conveyed in a state where both side edges are combined and formed into a cylindrical shape. The present invention relates to a bag making and packaging machine that ultrasonically seals both side edges.

  Conventionally, both side edges of a film are ultrasonically sealed by a horn and an anvil that strikes the film against both side edges of a film conveyed in a state where both side edges are aligned and formed into a cylindrical shape. A bag packaging machine is known (for example, Patent Document 1 (Japanese Patent Laid-Open No. 2016-222261)).

  In such a bag making and packaging machine, when a film is set in the packaging machine at the time of film replacement, an operation for transporting the film without making a bag instead of a normal bag making operation (here, such an operation). May be desired).

  Since there is no need to make a bag during the film feeding operation, it is only necessary to transport the film without performing ultrasonic sealing (that is, without vibrating the horn). However, when the film is sandwiched between the horn and the anvil, the film cannot be transported well due to the resistance of the sandwiching portion to the film transport, and there is a possibility that a film transport failure such as the film skewing may occur. On the other hand, if the film is conveyed while performing ultrasonic sealing as in the case of the normal bag making operation, the resistance of the sandwiching portion to the film conveyance is reduced by the vibration of the horn, and the film conveyance failure can be suppressed. However, in this case, particularly when the transport distance of the film becomes long, the horn and the anvil are overheated and the film may be melted.

  If the bag making and packaging machine is configured so that the horn and the anvil are separated from the film during the film feeding operation, it is possible to suppress the film conveyance failure and the occurrence of the film fusing. However, an actuator or mechanism for moving the horn or anvil is necessary to automatically separate the horn or anvil from the film during the film feeding operation. When such an actuator or mechanism is provided, there is a problem that the cost of the apparatus is increased and a space for arranging the actuator and mechanism is required, resulting in an increase in the size of the apparatus. It is also conceivable to provide a mechanism for manually moving the horn or anvil. In this case, an actuator for moving the horn or anvil can be omitted. However, whenever a film feeding operation is required, the horn or anvil is moved to a position away from the film, and then the film feeding operation is performed. Thereafter, the horn or anvil is moved to a position where the film is sandwiched between the horn and the anvil. Since the bag making operation is required to be moved, there is a problem that the operation becomes complicated.

  An object of the present invention is a bag making and packaging machine that ultrasonically seals both side edges of a film that is conveyed in a state in which both side edges are combined and formed into a cylindrical shape, and the film is formed without bag making. An object of the present invention is to provide a bag-making and packaging machine that can suppress the occurrence of film conveyance problems and fusing during conveyance and that is compact and has good workability.

  A bag making and packaging machine according to a first aspect of the present invention includes a transport unit, a seal unit, and a control unit. The conveying unit is fed out from the film roll, and the inner surface of one side edge and the outer surface of the other side edge are combined, or the inner surfaces of both side edges are combined to form a cylinder. Transport the film. The seal unit has a horn and an anvil that strikes the film on both side edges of the film conveyed by the conveyance unit so as to sandwich the film, and ultrasonically seals both side edges of the film. The control unit controls operations of the transport unit and the seal unit. The control unit has a first normal mode in which the seal unit performs ultrasonic sealing while transporting the film, and a second mode in which the horn is vibrated with an amplitude smaller than the amplitude of the horn in the normal first mode while transporting the film. As a control mode.

  The bag making and packaging machine according to the first aspect of the present invention has a normal first mode as a control mode of the bag making and packaging machine, in addition to the normal first mode (normal control mode performed at the time of bag making), while conveying the film. It has a second mode in which the horn is vibrated with a smaller amplitude than the time. In the second mode, although the horn vibrates, the vibration amplitude is usually smaller than that in the first mode, so that overheating of the horn and anvil is easily suppressed. Therefore, by executing the second mode during the film feeding operation, the occurrence of film fusing can be prevented while the horn is vibrated to suppress the film conveyance failure. Furthermore, by executing the second mode, it is not necessary to move the positions of the horn and the anvil in order to suppress the film conveyance failure and the occurrence of fusing, and the work time required for the film feeding operation can be suppressed.

  The bag making and packaging machine according to the second aspect of the present invention is the bag making and packaging machine according to the first aspect, wherein the control unit is slower than the film transport speed in the first mode in the second mode, The film is transported to the transport unit.

  In the bag making and packaging machine according to the second aspect of the present invention, since the film transport speed in the second mode is relatively low, a film transport failure occurs particularly in the second mode (during film feeding operation). Hateful. However, if the film transport speed is reduced, the time required for transporting the film by a predetermined distance becomes longer, and the continuous moving time of the horn tends to be longer, so that the horn and anvil are likely to be overheated. . However, since the amplitude of the horn in the second mode is relatively small here, overheating of the horn and anvil can be suppressed even if the continuous operation time of the horn is relatively long.

  The bag making and packaging machine according to the third aspect of the present invention is the bag making and packaging machine according to the first aspect or the second aspect, and the second mode is executed when the film roll is replaced.

  In the bag making and packaging machine according to the third aspect of the present invention, at the time of exchanging the film roll, when carrying out the film feeding operation for adjusting the film conveyance state, etc., while suppressing the occurrence of film conveyance defects and fusing. In addition, the film conveyance state can be adjusted in a short working time.

  The bag making and packaging machine according to the fourth aspect of the present invention is the bag making and packaging machine according to any of the first to third aspects, and the control unit is normally the same in the first mode and the second mode. Vibrate the horn at frequency.

  In the bag making and packaging machine according to the fourth aspect of the present invention, even if it is difficult to change the frequency of the horn on the specification, while suppressing the occurrence of film conveyance failure and fusing during the film feeding operation, and The work time required for the film feeding operation can be suppressed.

  A bag making and packaging machine according to a fifth aspect of the present invention is the bag making and packaging machine according to any one of the first to fourth aspects, wherein the control unit is configured to control the horn in the first mode normally in the second mode. The horn is vibrated with an amplitude less than half the amplitude.

  In the bag making and packaging machine according to the fifth aspect of the present invention, the amplitude of the horn in the second mode is adjusted to be less than or equal to half the amplitude of the horn in the normal first mode performed during bag making. It is easy to prevent the film from fusing at the time of execution.

  A bag making and packaging machine according to a sixth aspect of the present invention is the bag making and packaging machine according to any one of the first to fifth aspects, and the anvil is a driven roller that rotates in accordance with the conveyance of the film.

  In the bag making and packaging machine according to the sixth aspect of the present invention, the anvil is configured to rotate in accordance with the conveyance of the film. With this configuration, the resistance force exerted on the film conveyance by the sandwiching portion of the film by the horn and the anvil can be reduced, the film is skewed, the film is dragged to open a hole, and the film is detached from between the horn and the anvil ( The occurrence of a problem that the horn and the anvil are in direct contact with each other can be suppressed. Therefore, even in the second mode in which the horn amplitude is relatively small, the resistance of film conveyance at the film clamping portion can be reduced, and the occurrence of film conveyance defects is particularly easily prevented.

  The bag making and packaging machine according to a seventh aspect of the present invention is the bag making and packaging machine according to any one of the first to sixth aspects, wherein the seal portion separates at least one of the horn and the anvil from the film. It further has a manual separation mechanism to be moved.

  In the bag making and packaging machine according to the present invention, it is not necessary to separate the horn or the anvil from the film when the second mode is executed (at the time of film feeding operation). Therefore, the mechanism for automatically operating the horn or anvil in the second mode can be omitted from the bag making and packaging machine, and the cost of the bag making and packaging machine can be reduced.

  On the other hand, since the bag making and packaging machine according to the seventh aspect of the present invention has a manual horn or anvil separation mechanism, a horn or anvil can be easily attached as needed during maintenance work or the like. It can be in a state separated from the film.

  In the bag making and packaging machine of the present invention, as a control mode of the bag making and packaging machine, in addition to the normal first mode (normal control mode performed at the time of bag making), the amplitude is smaller than that in the normal first mode while transporting the film. And has a second mode for vibrating the horn. In the second mode, although the horn vibrates, the vibration amplitude is usually smaller than that in the first mode, so that overheating of the horn and anvil is easily suppressed. Therefore, by executing the second mode during the film feeding operation, the occurrence of film fusing can be prevented while the horn is vibrated to suppress the film conveyance failure. Furthermore, by executing the second mode, it is not necessary to move the positions of the horn and the anvil in order to suppress the film conveyance failure and the occurrence of fusing, and the work time required for the film feeding operation can be suppressed.

It is a schematic perspective view of the bag making packaging machine which concerns on one Embodiment of this invention. It is a block diagram of the bag making packaging machine which concerns on FIG. It is the figure which drawn typically the bag making packaging unit of the bag making packaging machine which concerns on FIG. It is the figure which drawn typically the film sealed with the horn and anvil of the vertical seal mechanism of the bag making packaging machine which concerns on FIG. It is a schematic perspective view of the horn and anvil of the vertical seal mechanism of the bag making packaging machine which concerns on FIG. Schematic around the vertical seal mechanism depicting the state in which the horn is moved away from the anvil (separated from the film to be sealed) by the horn position moving mechanism of the vertical seal mechanism of the bag making and packaging machine according to FIG. It is a perspective view. It is the figure which drew typically the film sealed by the horn and anvil of the vertical seal mechanism of the bag making packaging machine concerning the modification A.

  Below, the bag making packaging machine 100 which concerns on one Embodiment of this invention is demonstrated, referring drawings. The following embodiments are specific examples of the present invention and do not limit the technical scope of the present invention, and can be modified as appropriate without departing from the spirit of the present invention.

  In the following description, expressions such as “front (front)”, “rear (back)”, “up”, “down”, “left”, “right”, etc. may be used to indicate the direction. is there. These expressions follow the directions shown in the figure unless otherwise specified. In the following description, the expressions “upstream” and “downstream” may be used, but “upstream” and “downstream” are based on the transport direction of the film F.

(1) Overall Configuration FIG. 1 is a schematic perspective view of a bag making and packaging machine 100 according to an embodiment of the present invention. FIG. 2 is a block diagram of the bag making and packaging machine 100. FIG. 3 is a diagram schematically showing the bag making and packaging unit 20 of the bag making and packaging machine 100.

  The bag making and packaging machine 100 wraps an article to be packaged while making a bag in the following manner.

  The bag making and packaging machine 100 forms both sides of the sheet-like film F into a cylindrical shape together. And the bag making packaging machine 100 seals the both-sides edge part of the film F made cylindrical to the vertical direction, and is set as the cylindrical film Fc. Further, the bag making and packaging machine 100 horizontally seals the vertically sealed film F (tubular film Fc). The article to be packaged is placed inside the cylindrical film Fc whose bottom end is horizontally sealed, and the upper side is further laterally sealed from the area where the article to be packaged is placed, so that the object to be packaged is filled inside. Bag B is manufactured. The article to be packaged is supplied, for example, by an article supply apparatus (for example, a conveyor) (not shown) at the front stage of the bag making and packaging machine 100 and is put into the cylindrical film Fc.

  The packaged item is, for example, a small industrial part or a small bag containing seasonings. The bag making and packaging machine 100 manufactures a bag B containing a predetermined amount of these items to be packaged. In addition, the kind of to-be-packaged object is only an illustration, and the bag making and packaging machine 100 can manufacture the bag B containing various to-be-packaged objects.

  The bag making and packaging machine 100 mainly includes a film supply unit 10, a bag making and packaging unit 20, an operation unit 70, and a control unit 80 (see FIGS. 1 to 3). The bag making and packaging unit 20 mainly includes a housing 200, a forming mechanism 30, a transport mechanism 40, a vertical seal mechanism 50, and a horizontal seal mechanism 60.

(2) Detailed Configuration (2-1) Film Supply Unit The film supply unit 10 is a unit that supplies the sheet-like film F to the bag making and packaging unit 20. The film F is, for example, a film having a polypropylene layer that is a thermoplastic resin on the surface. In addition, the film F used with the bag making packaging machine 100 is not limited to the film of such a material, What is necessary is just to select suitably from the films which can be ultrasonically sealed.

  A film roll 12 around which the film F is wound is set in the film supply unit 10. As will be described later, when the film F is transported by the transport mechanism 40 of the bag making and packaging unit 20, the film F is fed out from the film roll 12. The film F is guided by rollers (not shown) arranged along the conveyance path of the film F, and is conveyed to the forming mechanism 30 of the bag making and packaging unit 20.

(2-2) Bag Making and Packaging Unit The bag making and packaging unit 20 receives the supply of the object to be packaged, and uses the film F supplied from the film supply unit 10 to make the bag B containing the object to be packaged.

  The bag making and packaging unit 20 mainly includes a housing 200, a forming mechanism 30, a transport mechanism 40, a vertical seal mechanism 50, and a horizontal seal mechanism 60 (see FIGS. 1 and 3).

  The forming mechanism 30 is formed into a cylindrical shape by combining both side edges of the film F of the sheet-like film F that is fed out and conveyed from the film roll 12 of the film supply unit 10. Here, the side edge part of the film F means the edge part in the width direction of the film F. The width direction of the film F means a direction orthogonal to the transport direction of the film F. In FIG. 3, the width direction of the film F is the left-right direction. The transport mechanism 40 transports the cylindrical film F to the vertical seal mechanism 50. Here, the transport mechanism 40 transports the film F formed into a cylindrical shape downward. The vertical sealing mechanism 50 ultrasonically seals both side edges of the film F formed into a cylindrical shape conveyed by the conveying mechanism 40 in the vertical direction, and has a vertical sealing portion S that is ultrasonically sealed. A film Fc is formed (see FIG. 3). The horizontal sealing mechanism 60 performs horizontal sealing on the transported cylindrical film Fc along a direction intersecting the transport direction. In particular, here, the lateral seal mechanism 60 laterally seals the tubular film Fc conveyed downward along a direction (here, the left-right direction) orthogonal to the conveyance direction. Further, the horizontal seal mechanism 60 separates the lower part of the tubular film Fc in which the article to be packaged is housed and whose upper and lower ends are sealed from the tubular film Fc disposed above it. A bag B containing the package is made.

(2-2-1) Case The case 200 is a casing that mainly accommodates the bag making and packaging unit 20 therein (see FIG. 1). Inside the housing 200, the forming mechanism 30 (excluding the upper part of the tube 34 described later), the transport mechanism 40, the vertical seal mechanism 50, and the horizontal seal mechanism 60 are housed. A control unit 80 is also accommodated in the housing 200. An operation unit 70 is disposed on the upper front side of the housing 200.

  The housing 200 includes a door 210 disposed on the front side (see FIG. 1). By opening the door 210, an operator can perform maintenance of the transport mechanism 40, the vertical seal mechanism 50, the horizontal seal mechanism 60, and the like housed in the housing 200, or form the mechanism when replacing the film roll 12. The film F can be set to 30 (see FIG. 1).

  The bag making and packaging machine 100 is preferably configured not to operate when the door 210 is opened. By being configured in this way, it is possible to prevent the occurrence of an accident such as an operator having a finger or the like caught in the operating part of the bag making and packaging machine 100.

(2-2-2) Forming Mechanism The forming mechanism 30 mainly includes a tube 34 and a former 32 (see FIG. 3).

  The tube 34 is a cylindrical member, and the upper and lower ends are open. From the opening at the upper end of the tube 34, an article to be packaged stored in the bag B is introduced.

  The former 32 is disposed so as to surround the tube 34. The sheet-like film F fed out from the film roll 12 and conveyed to the former 32 is formed into a cylindrical shape when passing between the former 32 and the tube 34. In the present embodiment, the sheet-like film F that has been conveyed has an inner surface (Fai of the first side edge portion Fa) of one side edge of the film F and the other side of the film F as shown in FIG. The outer surface of the edge portion (the outer surface Fbo of the second side edge portion Fb) is combined and formed into a cylindrical shape.

(2-2-3) Transport Mechanism The transport mechanism 40 is an example of a transport unit. The transport mechanism 40 transports the film F formed into a cylindrical shape by the forming mechanism 30 to the vertical seal mechanism 50.

  The transport mechanism 40 is disposed below the vertical seal mechanism 50 (see FIG. 3). As shown in FIGS. 2 and 3, the transport mechanism 40 includes a pair of rollers 42 disposed so as to sandwich the tube 34 before and after the tube 34, and a motor 44 that drives the roller 42. The roller 42 is rotationally driven by a motor 44. The roller 42 on the front side of the tube 34 is rotated clockwise in a right side view (see FIG. 3). The roller 42 on the rear side of the tube 34 is rotated counterclockwise in the right side view (see FIG. 3). When the roller 42 is rotated in this way, the film F (the cylindrical film Fc after vertical sealing by the vertical sealing mechanism 50) sandwiched between the roller 42 and the tube 34 is conveyed downward. In order to prevent the roller 42 and the cylindrical film Fc from slipping when the cylindrical film Fc is conveyed, it is preferable that the friction coefficient of the surface of the roller 42 is relatively large.

  The motor 44 is a motor having a variable rotation speed. A control unit 80 to be described later controls the transport speed of the film F by the transport mechanism 40 by controlling the rotational speed of the motor 44.

  In addition, the structure of a conveyance mechanism is not limited to the structure demonstrated above, What is necessary is just the structure which can convey the film F shape | molded by the cylinder shape to the vertical sealing mechanism 50 in the state which can be vertically sealed. . For example, the transport mechanism may include a pair of belts having a suction function that are arranged on the left and right sides of the tube 34 so as to sandwich the tube 34, and the film F may be transported downward by rotating the belt. Further, the transport mechanism may be disposed at substantially the same height as the vertical seal mechanism 50 or above the vertical seal mechanism 50.

(2-2-4) Vertical Seal Mechanism The vertical seal mechanism 50 is an example of a seal portion. The vertical sealing mechanism 50 ultrasonically seals both side edges (first side edge Fa and second side edge Fb) of the film F formed into a cylindrical shape conveyed by the conveyance mechanism 40.

  The vertical seal mechanism 50 mainly includes a horn 52, an anvil 54, a horn position moving mechanism 58, an ultrasonic vibrator 94, and an ultrasonic oscillator 92 (FIGS. 1, 2, and 4 to 6). reference).

  Although not limited to the horn 52 and the anvil 54, for example, an aluminum alloy or a titanium alloy is used.

  The horn 52 and the anvil 54 are formed on the opposite sides of the film F (the portion where the inner surface Fai of the first side edge Fa and the outer surface Fbo of the second side edge Fb are combined). (See FIG. 4). The horn 52 is disposed in front of both side edges of the film F (see FIG. 4). The anvil 54 is disposed behind the aligned side edges of the film F (see FIG. 4). Note that a biasing member (not shown) that generates a force for pressing the horn 52 against the anvil 54 is attached to the horn 52. The biasing member is, for example, a spring. Due to the presence of the biasing member, the vertical seal target portion of the film F is sandwiched between the horn 52 and the anvil 54 with a predetermined pressure.

  The horn 52 is in contact with the film F to be longitudinally sealed at the tip 52a disposed on the back side (see FIG. 4). The tip 52a is formed in a substantially rectangular parallelepiped shape (see FIG. 6). The front end portion 52 a sandwiches the vertical seal portion of the film F between the anvil 54 and a rectangular contact surface that is arranged on the back side and has a vertical direction as a longitudinal direction. The end of the horn 52 opposite to the front end 52 a (here, the front side) is connected to the ultrasonic transducer 94. The horn 52 transmits the ultrasonic vibration generated by the ultrasonic vibrator 94 to the film F to be welded.

  The ultrasonic vibrator 94 is a piezoelectric element. The ultrasonic vibrator 94 is electrically connected to the ultrasonic oscillator 92. The ultrasonic oscillator 92 supplies a driving voltage to the ultrasonic vibrator 94. The control unit 80 to be described later controls the amplitude of the horn 52 that is ultrasonically vibrated by the ultrasonic vibrator 94 by controlling the ultrasonic oscillator 92.

  The anvil 54 is a driven roller that rotates in accordance with the conveyance of the film F. This will be described more specifically.

  The anvil 54 is formed in a thick cylindrical shape. Grooves are formed on the outer cylindrical surface of the anvil 54 (the surface holding the film F together with the horn 52) (see FIGS. 4 and 5). A shaft 55 is inserted through the hollow portion of the anvil 54 (see FIG. 5). The shaft 55 is attached to a support portion 56 provided on the front surface of the tube 34 in such a posture that its axial direction extends in the left-right direction (see FIG. 4). The support part 56 supports the shaft 55 so that rotation is possible. By being configured in this manner, the anvil 54 that sandwiches the film F with the horn 52 rotates following the film F as it is conveyed. With this configuration, it is possible to reduce the resistance force exerted on the film conveyance by the sandwiching portion of the film F by the horn 52 and the anvil 54.

  The horn position moving mechanism 58 is an example of a separation mechanism. The horn position moving mechanism 58 is a mechanism for manually moving the horn 52 away from the film F. The horn position moving mechanism 58 is used when the film roll 12 is used for the first time, when a film roll 12 different from the film used so far is used for packaging, etc. Used when the mechanism 50 is maintained.

  The horn position moving mechanism 58 mainly includes a hinge portion 58b and a fixing portion 58c (see FIG. 6).

  The hinge part 58b supports the horn support frame 58a that supports the horn 52 so as to be pivotable. By pulling the left side of the horn support frame 58a to the near side and pivoting the horn support frame 58a around the pivot axis of the hinge portion 58b, the state of the horn 52 is in contact with the film F and between the anvil 54 The first state in which the film F is sandwiched can be switched to the second state (see FIG. 6) that is away from the anvil 54 and separated from the film F. Further, by pushing the left side of the horn support frame 58a rearward and pivoting the horn support frame 58a around the pivot axis of the hinge portion 58b, the state of the horn 52 is changed from the second state to the above-mentioned second state. It is possible to switch to the first state.

  The fixing portion 58c is a mechanism for fixing the horn support frame 58a so that the horn 52 is maintained in the first state. The fixing portion 58c is, for example, a screw, and the horn support frame 58a is fixed at a predetermined position in the housing 200 in a predetermined posture by screwing the screw into a screw hole formed in the front frame. The horn 52 is in the first state. When the horn support frame 58a is fixed by the fixing portion 58c and the horn 52 is placed in the first state, the horn 52 is pressed against the anvil 54 side by a biasing member (not shown), and the film F is placed between the horn 52 and the anvil 54. It is pinched. During the operation of the bag making and packaging machine 100 (not only during normal operation (at the time of bag making operation) but also during the film feeding operation described later), the horn support frame 58a is fixed by the fixing portion 58c, and the state of the horn 52 is determined. Is in the first state.

  In addition, the fixing method of the horn support frame 58a demonstrated here is an illustration, Comprising: It is not limited to this, Various fixing methods can be utilized for fixation of the horn support frame 58a.

(2-2-5) Horizontal Seal Mechanism The horizontal seal mechanism 60 horizontally seals the tubular film Fc conveyed downward along a direction intersecting with the conveyance direction, in particular, a horizontal direction perpendicular to the conveyance direction here. It is a mechanism to do.

  The horizontal seal mechanism 60 is disposed below the vertical seal mechanism 50 (see FIG. 3).

  The lateral seal mechanism 60 has a pair of seal jaws 62 incorporating a heater (not shown) and a seal jaw drive unit 64 (see FIGS. 2 and 3). The pair of sealing jaws 62 are disposed on the front side and the rear side of the tubular film Fc, respectively. The pair of seal jaws 62 are arranged at the same height. The seal jaw drive unit 64 is, for example, an air cylinder, and moves at least one of the pair of seal jaws 62 in the horizontal direction toward the other.

  The lateral seal mechanism 60 moves at least one of the pair of seal jaws 62 toward the other by the seal jaw driving unit 64 so as to sandwich the tubular film Fc between the seal jaws 62 and the upper and lower ends of the bag B. The part to be a part is sealed with heat and pressure.

  Further, a cutter (not shown) is built in one of the sealing jaws 62. The horizontal seal mechanism 60 separates the bag B and the subsequent tubular film Fc at the center position in the height direction of the horizontal seal portion by the seal jaw 62 using a cutter.

  In the lateral seal mechanism 60 of the present embodiment, the seal jaw drive unit 64 moves at least one of the seal jaws 62 linearly in the horizontal direction toward the other seal jaw 62 to seal the tubular film Fc. Cinch between jaws 62. However, the operation of the seal jaw 62 is not limited to such a mode. For example, the seal jaw drive mechanism of the lateral seal mechanism may be configured to sandwich the tubular film Fc between the seal jaws 62 by turning the seal jaws 62 relative to each other.

  Further, in the horizontal sealing mechanism 60 of the present embodiment, the tubular film Fc is sealed using heat generated by the heater disposed inside the sealing jaw 62, but the present invention is not limited to such a mode. Absent. For example, the horizontal sealing mechanism may be configured to ultrasonically seal the tubular film Fc, similarly to the vertical sealing mechanism 50.

(2-3) Operation Unit The operation unit 70 is used to set an instruction for the bag making and packaging machine 100 and an operation of the bag making and packaging machine 100.

  The instructions for the bag making and packaging machine 100 include, but are not limited to, a bag making operation execution instruction to be described later, a film feed operation execution instruction to be described later, and a first operation execution instruction to be described later. The execution instruction for the bag making operation is an execution instruction for the normal operation of the bag making and packaging machine 100 using the first normal mode described later as the control mode. The execution instruction for the film feeding operation is an execution instruction for the operation of the bag making and packaging machine 100 using the second mode described later as the control mode.

  The setting of the operation of the bag making and packaging machine 100 includes, but is not limited to, the bag length of the bag B, the amplitude value of the horn 52 in the normal first mode, and the like. When the amplitude of the horn 52 in the normal first mode is fixed at a predetermined value, the amplitude value of the horn 52 in the normal first mode may not be configured to be input from the operation unit 70.

(2-4) Control Unit The control unit 80 is a control device that controls the operation of the bag making and packaging machine 100.

  The control unit 80 includes a CPU, a ROM, a RAM, and the like. The control unit 80 is electrically connected to various configurations of the film supply unit 10 and the bag making and packaging unit 20 (the motor 44 of the transport mechanism 40, the ultrasonic oscillator 92 of the vertical seal mechanism 50, the horizontal seal mechanism 60), and the like. (See FIG. 2). The control unit 80 is also electrically connected to the operation unit 70 (see FIG. 2). In the control unit 80, the CPU reads out and executes the program stored in the memory, so that the operations of various configurations of the film supply unit 10 and the bag making and packaging unit 20 are performed according to the operation and setting input from the operation unit 70. To control.

  Further, the control unit 80 may be connected to be communicable with a control unit of an article supply device (for example, a conveyor) that supplies an article to be supplied to the bag making and packaging machine 100 outside the bag making and packaging machine 100. preferable. Then, the control unit 80 is configured to be able to transmit a signal requesting supply of a packaged object or to receive a signal requesting execution of a bag making operation in accordance with the supply of the packaged object. The to-be-packaged article supply apparatus and the bag making and packaging machine 100 can be controlled in conjunction with each other.

  For example, the control unit 80 controls the operation of the transport mechanism 40 so as to appropriately change the rotation speed of the motor 44. By changing the rotation speed of the motor 44, the conveyance speed of the film F conveyed by the conveyance mechanism 40 is changed.

  Further, the control unit 80 controls the operation of the vertical seal mechanism 50 so as to change the amplitude of the horn 52 as appropriate, for example. Specifically, the control unit 80 controls the ultrasonic vibration generated by the ultrasonic vibrator 94 by controlling the ultrasonic oscillator 92 that supplies a driving voltage to the ultrasonic vibrator 94, and the ultrasonic vibrator 94 changes the amplitude of the horn 52 that is ultrasonically vibrated.

  Now, the control unit 80 mainly has a first mode and a second mode as control modes of the bag making and packaging machine 100.

  Normally, the first mode is a control mode in which the vertical sealing mechanism 50 performs ultrasonic sealing while the film F is transported by the transport mechanism 40. The normal first mode is a control mode in which the horizontal sealing mechanism 60 performs horizontal sealing on the tubular film Fc vertically sealed by the vertical sealing mechanism 50. The normal first mode is a control mode that is executed by the control unit 80 during normal operation, that is, when a bag B containing an article to be packaged is made.

  On the other hand, the second mode is a control mode for causing the bag making and packaging machine 100 to perform an operation (film feeding operation) for transporting the film F without bag making. In the second mode, the film sealing operation by the lateral sealing mechanism 60 is not performed. The second mode is a control mode of the bag making and packaging machine 100 that is used when the film F appropriately adjusts the transport state, for example, when the film roll 12 is replaced. Note that the film F being transported in an appropriate state means that when the film F is transported, the film F is appropriately formed into a cylindrical shape by the forming mechanism 30 and is transported along a path through which the film F is originally transported. This refers to a state in which an inappropriate force is not applied to cause wrinkles or scratches.

  The replacement of the film roll 12 includes replacement of the film roll 12 performed when the film is updated and replacement of the film roll 12 performed when the film is added.

  The replacement of the film roll 12 performed at the time of renewal of the film means that when the bag making and packaging machine 100 is used for the first time (when the film roll 12 is first set in the bag making and packaging machine 100), Means an exchange (set) of the film roll 12 performed when a different film is used for packaging. On the other hand, the replacement of the film roll 12 performed when the film is added is the replacement of the film roll 12 performed when a film of a new film roll is added to the film roll that has been used up to now. Say.

When the film roll 12 is exchanged when the film is updated, the worker performs, for example, the following work before causing the bag making and packaging machine 100 to perform the film feeding operation (operation in the second control mode). I do.
The horn position moving mechanism 58 is manually operated to bring the horn 52 away from the anvil 54 (the horn 52 is set to the second state (see FIG. 6)).
-Remove the film F used so far from the transport path of the film F (except when the film roll 12 is set in the bag making and packaging machine 100 for the first time).
The film roll 12 is set at a predetermined position of the film supply unit 10.
The film F unwound from the film roll 12 is wound around a roller of the film supply unit 10 (not shown) arranged along the film F conveyance path in a predetermined manner.
The film F wound around the roller of the film supply unit 10 (not shown) is set on the former 32 of the forming mechanism 30.
The film F unwound from the film roll 12 and passed through the forming mechanism 30 is pulled out to at least the position of the roller 42 of the transport mechanism 40.
-After the film F has been pulled out to the position of the roller 42 of the transport mechanism 40, the horn position moving mechanism 58 is manually operated to bring the horn 52 closer to the anvil 54 to the above first state and pass through the forming mechanism 30. The film F guided to the vertical sealing mechanism 50 is sandwiched between the horn 52 and the anvil 54.

  On the other hand, when the film roll 12 is replaced when the film is added, the worker makes the film supply unit before the bag making and packaging machine 100 executes the film feeding operation (operation in the second control mode). A new film roll 12 is set at 10 predetermined positions. Then, the worker performs an operation of attaching the leading portion of the film F of the newly set film roll 12 with a tape or the like to the terminal portion of the film F of the film roll 12 that has been used so far. When the film is added, the newly set film F of the film roll 12 is pulled by the film F of the film roll 12 that has been used so far and is conveyed along a predetermined conveyance path. Therefore, when the film is added, the worker does not particularly hang the film F around the roller of the film supply unit 10, set the film F on the former 32, or operate the horn position moving mechanism 58.

(2-4-1) Operation of the bag making and packaging machine in the second mode (film feeding operation)
An operation (film feeding operation) of the bag making and packaging machine 100 when the control unit 80 executes the second mode will be described. As a premise, it is assumed that the worker has completed the above-described work performed before the bag making and packaging machine 100 performs the film feeding operation.

  When a switch (not shown) for instructing execution of the film feeding operation of the operation unit 70 is pressed, the control unit 80 controls the operation of each part of the bag making and packaging machine 100 as described below to make the bag making and packaging. The machine 100 is caused to execute a film feeding operation. Here, the control unit 80 causes the bag making and packaging machine 100 to execute the film feeding operation only while the switch instructing the execution of the film feeding operation of the operation unit 70 is being pressed. However, the control unit 80 is not limited to this, and when the switch instructing execution of the film feeding operation of the operation unit 70 is pressed, the control unit 80 causes the bag making and packaging machine 100 to be in a predetermined time (for example, 10 seconds). The film feeding operation may be performed.

  The control unit 80 does not operate the lateral seal mechanism 60 when executing the second mode. When the second mode is executed, the seal jaws 62 of the lateral seal mechanism 60 are arranged in a state of being separated from each other.

  During the execution of the second mode, the control unit 80 operates the motor 44 of the transport mechanism 40 to transport the film F. In the second mode (at the time of film feeding operation), the control unit 80 is at a lower speed than the conveying speed (first speed) of the film F in the first mode (at the time of bag making operation). It is preferable to control the rotation speed of the motor 44 so as to convey the sheet. For example, in the second mode, the film F is preferably transported by the transport mechanism 40 at a speed (second speed) that is half or less of the transport speed (first speed) in the first mode. During execution of the second mode, unlike the execution of the normal first mode, which will be described later, the horizontal sealing mechanism 60 does not perform the sealing operation. The film F is transported (without interruption while is pressed).

  During the execution of the second mode, the control unit 80 vibrates the horn 52 of the vertical seal mechanism 50 while transporting the film F (while the film F is transported by the transport mechanism 40). During execution of the second mode, the control unit 80 vibrates the horn 52 with an amplitude (second amplitude) smaller than the amplitude (first amplitude) of the horn 52 in the normal first mode (bag making operation). Let Specifically, the control unit 80 controls the ultrasonic oscillator 92 of the vertical sealing mechanism 50 to adjust the amplitude of the horn 52 to a second amplitude smaller than the first amplitude. The second amplitude is the amplitude of the horn 52 determined so that the film F is not melted even if the horn 52 is vibrated while conveying the film F at the second speed for a predetermined period (for example, 15 seconds). Since the film F does not need to be vertically sealed during the film feeding operation, the second amplitude is determined to be as small as possible as long as the film holding by the horn and the anvil does not adversely affect the film conveyance. It is preferable. For example, in the second mode, the control unit 80 preferably vibrates the horn 52 with an amplitude (second amplitude) that is less than or equal to half the amplitude (first amplitude) of the horn 52 in the normal first mode. For example, when the first amplitude is about 70% of the maximum amplitude with respect to the maximum amplitude (several tens of micrometers) of the horn 52, the second amplitude is preferably about 30% of the maximum amplitude.

  The control unit 80 preferably vibrates the horn 52 at the same frequency in the normal first mode and the second mode. In this case, the ultrasonic oscillator 92 and the ultrasonic vibrator 94 may be configured so that the ultrasonic vibrator 94 generates vibrations having the same frequency.

  After causing the bag making and packaging machine 100 to perform the film feeding operation and before causing the bag making and packaging machine 100 to perform the bag making operation, the operator further operates the operation unit 70 to cause the bag making and packaging machine 100 to perform the following operations. Such first operation is performed.

  During the first operation, the control unit 80 causes the transport mechanism 40 to transport the film F at the same speed as the transport speed (first speed) of the film F in the normal first mode. During the first operation, the control unit 80 vibrates the horn 52 of the vertical sealing mechanism 50 with the same amplitude as the horn 52 in the first mode (first amplitude) during the conveyance of the film F. Is ultrasonically sealed in the vertical direction. The control unit 80 transports the film F by the first distance by the transport mechanism 40 while performing the vertical seal by the vertical seal mechanism 50. The first distance is a longer distance from the position of the horn 52 of the vertical seal mechanism 50 to the position of the seal jaw 62 of the horizontal seal mechanism 60 in the transport direction (here, the vertical direction) of the film F. When the transport mechanism 40 finishes transporting the film F by the first distance, the control unit 80 controls the seal jaw drive unit 64 of the lateral seal mechanism 60 to sandwich the film F between the pair of seal jaws 62. Perform horizontal sealing. Further, the lateral seal mechanism 60 separates the film F below the lateral seal position from the film F above the lateral seal position.

  When the film feeding operation is completed, since the amplitude of the horn 52 is reduced, the film F existing below the vertical sealing mechanism 50 may not be vertically sealed. Even if the amplitude of the horn 52 is reduced, there is a possibility that the film F existing on the lower side of the vertical sealing mechanism 50 may be vertically sealed, but such vertical sealing is usually incomplete. Therefore, it is not preferable to use the film F present on the lower side of the vertical seal mechanism 50 at the completion of the film feeding operation for packaging of an object to be packaged. On the other hand, when the film feeding operation is completed, the first operation is executed to discharge a portion where the vertical seal of the film F is not completed (or a portion where the vertical seal of the film F is insufficient). Can do.

  Here, the operator performs an operation for causing the bag making and packaging machine 100 to execute the first operation on the operation unit 70 separately from the operation on the operation unit 70 for executing the film feeding operation. The control unit 80 causes the bag making and packaging machine 100 to execute the first operation. However, the present invention is not limited to this. For example, when the operator performs an operation for executing the film feeding operation on the operation unit 70, the first operation is automatically executed when the film feeding operation is completed. May be configured.

(2-4-2) Operation of bag making and packaging machine in normal first mode (bag making operation)
An operation (bag making operation) of the bag making and packaging machine 100 when the control unit 80 normally executes the first mode will be described. Here, it is assumed that the bag making and packaging machine 100 is in a state where the bag making operation can be immediately executed.

  For example, the control unit 80 appropriately stores a packaged item in the bag B produced by the bag-making and packaging machine 100 based on a signal transmitted from the control unit of the preceding-stage packaged product supply apparatus. The operation of the bag making and packaging machine 100 is controlled at the timing.

  The control unit 80 controls the transport mechanism 40 to transport the seal-like film F from the film supply unit 10 to the forming mechanism 30. The conveyance speed of the film F by the conveyance mechanism 40 is the first speed. In addition, the conveyance speed of the film F by the conveyance mechanism 40 in the normal first mode may be variable. Even in that case, it is preferable that the transport speed (second speed) of the film F in the second mode is lower than the minimum transport speed of the film F that can be normally set in the first mode. More preferably, the conveyance speed (second speed) of the film F in the second mode is usually half or less of the minimum conveyance speed of the film F that can be set in the first mode.

  The film F conveyed to the forming mechanism 30 is formed into a cylindrical shape by the forming mechanism 30. The film F formed into a cylindrical shape is ultrasonically sealed in the vertical direction by the vertical sealing mechanism 50. Specifically, the control unit 80 controls the ultrasonic oscillator 92 of the vertical sealing mechanism 50 so that the horn 52 of the vertical sealing mechanism 50 vibrates with the first amplitude during the conveyance of the film F. The first amplitude is an amplitude determined so that the film F conveyed at the first speed is appropriately vertically sealed. In the vertical seal mechanism 50, the horn 52 causes ultrasonic vibration based on the ultrasonic vibration generated by the ultrasonic vibrator 94. The combined side edges Fa and Fb of the tubular film F sandwiched between the horn 52 and the anvil 54 are heated and melted by receiving the energy of ultrasonic vibration of the horn 52. Further, the combined side edges Fa and Fb of the melted film F are sandwiched and pressed by the horn 52 and the anvil 54. As a result, both side edges Fa and Fb of the film F are ultrasonically sealed.

  When the cylindrical film Fc in which the vertical seal portion S is formed by the vertical seal mechanism 50 is transported to a predetermined position, the control unit 80 (the portion to be laterally sealed of the cylindrical film Fc is located in the horizontal seal mechanism 60). When the seal jaw 62 reaches the height position), the transport of the film F by the transport mechanism 40 is temporarily stopped. Stopping the conveyance of the film F here includes stopping the conveyance of the vertically sealed film F, that is, the tubular film Fc.

  Further, when the conveyance of the film F is stopped, the control unit 80 also stops the vibration of the horn 52 of the vertical sealing mechanism 50. Further, the control unit 80 drives the seal jaw drive unit 64 of the horizontal seal mechanism 60 to horizontally seal the cylindrical film Fc at the timing when the article to be packaged reaches the lower end of the cylindrical film Fc. The bag B whose end is laterally sealed is cut off from the tubular film Fc.

(3) Features (3-1)
The bag making and packaging machine 100 according to the present embodiment includes a transport mechanism 40 as an example of a transport unit, a vertical seal mechanism 50 as an example of a seal unit, and a control unit 80 as an example of a control unit. The transport mechanism 40 is unwound from the film roll 12, and has an inner surface of one side edge (an inner surface Fai of the first side edge Fa) and an outer surface of the other side edge (an outer surface Fbo of the second side edge Fb). Are combined, and the film F formed into a cylindrical shape is conveyed. The vertical seal mechanism 50 includes a horn 52 and an anvil 54 that come into contact with both side edges Fa and Fb of the film F transported by the transport mechanism 40 so as to sandwich the film F. Both side edges of the film F Fa and Fb are ultrasonically sealed. The control unit 80 controls the operations of the transport mechanism 40 and the vertical seal mechanism 50. The control unit 80 vibrates the horn with an amplitude smaller than the amplitude of the horn in the normal first mode while conveying the film F and the normal first mode in which the vertical sealing mechanism 50 performs ultrasonic sealing while conveying the film F. The second mode is a control mode.

  The bag making and packaging machine 100 has a control mode of operation of the bag making and packaging machine 100 in addition to the normal first mode (normal control mode performed at the time of bag making) as well as the normal first mode while transporting the film F. A second mode for vibrating the horn 52 with a small amplitude is provided. In the second mode, although the horn 52 vibrates, the amplitude of vibration is usually smaller than that in the first mode, so that overheating of the horn 52 and the anvil 54 is easily suppressed. Therefore, by executing the second mode during the film feeding operation (the operation of conveying the film without carrying out bag making), the horn 52 is vibrated to suppress the trouble of conveying the film F and also prevent the occurrence of film fusing. it can. Further, by executing the second mode, it is not necessary to move the positions of the horn 52 and the anvil 54 in order to suppress the conveyance failure of the film F and the occurrence of fusing, thereby reducing the work time necessary for the film feeding operation. Can do.

(3-2)
In the bag making and packaging machine 100 according to this embodiment, in the second mode, the control unit 80 causes the transport mechanism 40 to transport the film F at a lower speed than the transport speed of the film F in the first mode.

  In the bag making and packaging machine 100, since the transport speed of the film F in the second mode is relatively low, a trouble of transport of the film F is unlikely to occur particularly in the second mode (during film feeding operation). However, if the transport speed of the film F is lowered, the time required for transporting the film F by a predetermined distance becomes longer and the continuous moving time of the horn 52 tends to be longer, so that the horn 52 and the anvil 54 are likely to be overheated. There is a problem of becoming. However, since the amplitude of the horn 52 in the second mode is relatively small here, overheating of the horn 52 and the anvil 54 can be suppressed even if the continuous operation time of the horn 52 is relatively long.

(3-3)
In the bag making and packaging machine 100 according to the present embodiment, the second mode is executed when the film roll 12 is replaced.

  In the bag making and packaging machine 100, when the film roll operation is performed for adjusting the film conveyance state when the film roll 12 is replaced, it is possible to suppress the occurrence of film F conveyance failure and fusing, and to reduce the work time. The conveyance state of the film F can be adjusted.

(3-4)
In the bag making and packaging machine 100 according to the present embodiment, the control unit 80 vibrates the horn 52 at the same frequency in the first mode and the second mode.

  In the bag making and packaging machine 100, even if it is difficult to change the frequency of the horn 52 due to the specification, the film feeding operation is suppressed while suppressing the occurrence of film F conveyance failure and fusing during the film feeding operation. Necessary work time can be reduced.

(3-5)
In the bag making and packaging machine 100 according to this embodiment, in the second mode, the control unit 80 vibrates the horn 52 with an amplitude equal to or less than half of the amplitude of the horn 52 in the normal first mode.

  In the bag making and packaging machine 100, since the amplitude of the horn 52 in the second mode is adjusted to half or less of the amplitude of the horn 52 in the normal first mode performed at the time of bag making, the film in the second mode is executed. It is easy to prevent F from fusing.

(3-6)
In the bag making and packaging machine 100 according to the present embodiment, the anvil 54 is a driven roller that rotates in accordance with the conveyance of the film F.

  In the bag making and packaging machine 100, the anvil 54 is configured to rotate in accordance with the conveyance of the film F. With this configuration, the resistance force exerted on the film conveyance by the sandwiching portion of the film F by the horn 52 and the anvil 54 can be reduced, the film F is skewed, the film F is dragged and a hole is opened, and the horn 52 and the anvil 54 Generation | occurrence | production of the malfunction that the film F remove | deviates from between (the horn 52 and the anvil 54 contact directly) can be suppressed. Therefore, even in the second mode in which the amplitude of the horn 52 is relatively small, it is possible to reduce the resistance of film conveyance at the sandwiching portion of the film F, and it is particularly easy to prevent the occurrence of film F conveyance defects.

(3-7)
In the bag making and packaging machine 100 according to the present embodiment, the vertical seal mechanism 50 includes a manual horn position moving mechanism 58 that moves the horn 52 so as to be separated from the film F. The horn position moving mechanism 58 is an example of a separation mechanism.

  In the bag making and packaging machine 100, the horn 52 or the anvil 54 does not need to be separated from the film F when the second mode is executed (at the time of film feeding operation). Therefore, the mechanism for automatically operating the horn 52 or the anvil 54 in the second mode can be omitted from the bag making and packaging machine 100, and the cost of the bag making and packaging machine 100 can be reduced.

  On the other hand, the bag making and packaging machine 100 has the manual horn position moving mechanism 58, so that the horn 52 is easily separated from the film F as needed during maintenance work or the like. be able to.

(4) Modifications Modifications of the above embodiment are shown below. Note that the following modifications may be combined as appropriate within a range that is consistent with each other.

(4-1) Modification A
In the above embodiment, the transport mechanism 40 transports the film F formed into a cylindrical shape by combining the inner surface Fai of the first side edge portion Fa with the outer surface Fbo of the second side edge portion Fb. The vertical sealing mechanism 50 ultrasonically seals both side edges Fa and Fb where the inner surface Fai of the first side edge Fa and the outer surface Fbo of the second side edge Fb are combined. However, the configuration of the bag making and packaging machine according to the present invention is not limited to this.

  For example, as shown in FIG. 7, the transport mechanism is configured to transport the film F formed into a cylindrical shape by combining the inner surface Fai of the first side edge portion Fa and the inner surface Fbi of the second side edge portion Fb. There may be. That is, the forming mechanism of the bag making and packaging device forms the film F fed from the film roll 12 into a cylindrical shape by combining the inner surface Fai of the first side edge portion Fa and the inner surface Fbi of the second side edge portion Fb. It may be a thing. The vertical sealing mechanism includes a horn 52 and an anvil that strike the film F against both side edges Fa and Fb in which the inner face Fai of the first side edge Fa and the inner face Fbi of the second side edge Fb are combined. 54 (see FIG. 7), both side edges Fa and Fb of the film F may be ultrasonically sealed.

(4-2) Modification B
In the above embodiment, the control unit 80 causes the bag making and packaging machine 100 to execute the film feeding operation in the second mode when the film roll is replaced, but the present invention is not limited to this. The control unit 80 is operated from the operation unit 70 when a film F conveyance failure or a vertical seal failure occurs, when the bag making and packaging machine 100 that has stopped operating is restarted, or when other operation adjustments are performed. The bag making and packaging machine 100 may execute the film feeding operation in the second mode based on the above input or automatically.

(4-3) Modification C
The shapes and structures of the horn 52 and the anvil 54 described in the above embodiment are examples, and the shapes and structures are not limited.

  For example, the horn 52 may have another shape different from the shape exemplified in the above embodiment. The shape of the horn 52 may be appropriately designed so that the film F can be appropriately ultrasonically sealed.

  The anvil 54 is preferably a driven roller that rotates in accordance with the conveyance of the film F, but may be a non-moving member.

(4-4) Modification D
In the above embodiment, in the second mode, the film F is normally transported at a lower speed than the transport speed of the film F in the first mode. However, the present invention is not limited to this, and the transport speed of the film F in the second mode. And the conveyance speed of the film F in the normal first mode may be the same.

  However, the second mode is a control mode executed mainly for adjustment of the film conveyance state. Therefore, it is preferable that the transport speed of the film F in the second mode is generally lower than the transport speed of the film F in the first mode.

(4-5) Modification E
In the above embodiment, the horn 52 is moved away from the film F (away from the anvil 54) by the horn position moving mechanism 58, which is an example of the separation mechanism. However, the present invention is not limited to this, and the separation mechanism may be a mechanism that moves the anvil 54 away from the film F (away from the horn 52). The separation mechanism may be a mechanism that moves both the horn 52 and the anvil 54 so as to separate from the film F (so that the horn 52 and the anvil 54 move away from each other).

(4-6) Modification F
In the above-described embodiment, the bag making and packaging machine 100 performs the first operation after executing the film feeding operation and before executing the bag making operation. However, it is not limited to this.

  For example, after completing the execution of the film feeding operation, the control unit 80 replaces the first operation with the bag making operation (the operation of the bag making and packaging machine 100 in the first mode) in a state in which an article to be packaged is not supplied. ) May be performed a predetermined number of times. Even when the bag making and packaging machine 100 performs such an operation instead of the first operation, the portion where the vertical seal of the film F is not completed (or the portion where the vertical seal of the film F is insufficient) is discharged. Is possible.

  INDUSTRIAL APPLICABILITY The present invention can be widely applied to a bag making and packaging machine that ultrasonically seals both side edges of a film that is conveyed in a state where both side edges are combined and formed into a cylindrical shape.

12 Film roll 40 Conveying mechanism
50 Vertical seal mechanism (seal part)
52 Horn 54 Anvil (driven roller)
58 Horn position moving mechanism (separation mechanism)
80 Control unit (control unit)
100 Bag making and packaging machine F Film Fa First side edge (one of the side edges of the film)
Fai inner surface Fb of the first side edge part second side edge part (the other side edge part of the film)
Fbi inner surface of the second side edge Fbo outer surface of the second side edge

JP 2016-222261 A

Claims (7)

Rolled out from a film roll, the inner surface of one side edge and the outer surface of the other side edge are combined, or the inner surfaces of both side edges are combined to convey a film formed into a cylindrical shape A transport section;
A seal portion for ultrasonically sealing the both side edges of the film, having a horn and an anvil that hits the film against the both side edges of the film transported by the transport unit;
A control unit for controlling operations of the transport unit and the seal unit;
With
The control unit includes a normal first mode in which the sealing unit performs ultrasonic sealing while transporting the film, and an amplitude smaller than the amplitude of the horn in the normal first mode while transporting the film. Having a second mode for vibrating the control mode,
Bag making and packaging machine. In the second mode, the control unit causes the transport unit to transport the film at a lower speed than the transport speed of the film in the normal first mode.
The bag making and packaging machine according to claim 1. The second mode is executed when the film roll is replaced.
The bag making and packaging machine according to claim 1 or 2. The control unit vibrates the horn at the same frequency in the normal first mode and the second mode.
The bag making and packaging machine according to any one of claims 1 to 3. In the second mode, the control unit vibrates the horn with an amplitude equal to or less than half of the amplitude of the horn in the normal first mode.
The bag making and packaging machine according to any one of claims 1 to 4. The anvil is a driven roller that rotates according to the conveyance of the film.
The bag making and packaging machine according to any one of claims 1 to 5. The seal portion further includes a manual separation mechanism that moves at least one of the horn and the anvil so as to separate from the film.
The bag making and packaging machine according to any one of claims 1 to 6.

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