JP6267050B2 - Ultrasonic packaging machine - Google Patents

Description

  The present invention relates to an ultrasonic packaging machine, and more particularly, to an ultrasonic packaging machine that sandwiches a packaging film between an ultrasonic sealing horn and an anvil and performs ultrasonic sealing.

  2. Description of the Related Art Conventionally, an ultrasonic packaging machine that seals a packaging film by sandwiching a sealing portion of a packaging film between an ultrasonic sealing horn and an anvil and applying vibration energy from a vibrator to the horn is known (for example, a patent) Document 1 (Japanese Patent Laid-Open No. 2012-250766).

  In such an ultrasonic packaging machine, a vibrator is oscillated at a frequency determined for each horn, and a packaging film is welded.

  On the other hand, when the inventor oscillates the vibrator at a predetermined frequency, the operating frequency of the vibrator may be out of the optimum range for welding depending on the packaging conditions. I found.

  An object of the present invention is to provide a highly reliable ultrasonic packaging machine that makes it easy to operate a vibrator at an optimum operating frequency regardless of packaging conditions.

The ultrasonic packaging machine according to the present invention includes an anvil, a horn, an ultrasonic transducer, and a control unit. The horn sandwiches the packaging film with the anvil and seals the packaging film. The ultrasonic transducer is connected to a horn. Control unit, upon sealing the packaging film, is vibrated with the ultrasonic transducer. Control unit has based on the frequency-related information relating to the operating frequency of the ultrasonic transducers in place at the sealing of the packaging film in advance performed, the calculator for calculating the oscillation frequency corresponding to the difference in packaging conditions. The controller vibrates the ultrasonic vibrator at the calculated oscillation frequency when sealing the packaging film in actual operation.

  Here, since the suitable oscillation frequency is calculated for each packaging condition based on the frequency-related information acquired when the packaging film is sealed in advance, the ultrasonic vibrator is operated at the optimum operating frequency regardless of the packaging conditions. A reliable ultrasonic packaging machine that is easy to operate can be realized.

In the ultrasonic packaging machine according to the present invention, the arithmetic unit calculates a correction value for the basic frequency is an initial setting value, it is preferable to calculate the oscillation frequency which is the sum of the correction value and the fundamental frequency.

  Here, the calculation unit calculates a correction value for each packaging condition with respect to the fundamental frequency, so that a suitable oscillation frequency is calculated. Therefore, the ultrasonic vibrator operates at the optimum operating frequency regardless of the packaging conditions. It is possible to realize an ultrasonic packaging machine that is easy to make and highly reliable.

  Further, in the ultrasonic packaging machine according to the present invention, the calculation unit performs the packaging based on the frequency related information acquired at the time of sealing the packaging film performed in advance without supplying an object to be packaged to the ultrasonic packaging machine. It is preferable to calculate a suitable oscillation frequency according to the difference in conditions.

  Here, since a suitable oscillation frequency is calculated based on frequency-related information acquired at the time of sealing performed without supplying an object to be packaged, it is obtained at the time of an abnormal sealing operation such as biting of an object to be packaged. The oscillation frequency is not calculated based on the inappropriate frequency-related information. Therefore, a highly reliable ultrasonic packaging machine can be realized.

  Further, in the ultrasonic packaging machine according to the present invention, the calculation unit performs packaging based on frequency-related information acquired at the time of sealing of the packaging film performed in the past by supplying an object to be packaged to the ultrasonic packaging machine. It is preferable to calculate a suitable oscillation frequency according to the difference in conditions.

  Here, since a suitable oscillation frequency is calculated based on information obtained during past actual operation, it is possible to update the suitable oscillation frequency according to changes in packaging conditions while performing actual operation. It is always easy to obtain a suitable oscillation frequency.

Further, in the ultrasonic packaging machine according to the present invention, computation unit, as the oscillation frequency corresponding to the difference in packaging condition, it is preferable to calculate the oscillation frequency corresponding to the difference between the type of packaging film.

  Here, since a suitable oscillation frequency is calculated according to the difference in the type of packaging film, it is easy to operate the ultrasonic vibrator at the optimum operating frequency regardless of the type of packaging film.

Moreover, it is preferable that the ultrasonic packaging machine according to the present invention further includes a storage unit. The storage unit, information about the oscillation frequency calculated by the calculating unit is preferably stored in different packaging conditions.

  Here, since information on suitable oscillation frequencies is stored for each packaging condition, when the packaging conditions change, it is easy to quickly change the ultrasonic oscillator to a suitable oscillation frequency and operate accordingly. It is.

  In the ultrasonic packaging machine of the present invention, since a suitable oscillation frequency is calculated for each packaging condition based on the frequency-related information acquired at the time of sealing the packaging film, which has been performed in advance, the ultrasonic vibration is performed regardless of the packaging conditions. A highly reliable ultrasonic packaging machine that can easily operate the child at the optimum operating frequency can be realized.

It is a perspective view of a measurement packaging apparatus including the bag making packaging machine which concerns on one Embodiment of the ultrasonic packaging machine of this invention. It is a perspective view which shows schematic structure of the bag making packaging unit of the bag making packaging machine which concerns on FIG. It is a block diagram of the bag making packaging machine which concerns on FIG. It is a perspective view of the vertical seal mechanism of the bag making packaging unit which concerns on FIG. It is the schematic side view which looked at the horizontal sealing mechanism of the bag making packaging unit concerning FIG. 2 from the left side in FIG. It is the schematic side view which looked at the locus | trajectory of the horn and anvil of the horizontal seal mechanism which concerns on FIG. 5 from the left side in FIG. FIG. 6 is a perspective view of a first rotating body and a second rotating body of the lateral seal mechanism according to FIG. It is a flowchart for demonstrating the calculation process of the oscillation frequency of the controller of the bag making packaging machine which concerns on FIG.

  An embodiment of an ultrasonic packaging machine according to the present invention will be described with reference to the drawings.

  The following embodiments are specific examples of the present invention and do not limit the technical scope of the present invention.

(1) Overall Configuration FIG. 1 is a perspective view of a weighing and packaging apparatus 1 including a bag making and packaging machine 3 as an embodiment of an ultrasonic packaging machine according to the present invention. FIG. 2 is a perspective view showing a schematic configuration of the bag making and packaging unit 3 a included in the bag making and packaging machine 3. FIG. 3 is a block diagram of the bag making and packaging machine 3.

  The weighing and packaging apparatus 1 includes a combination weighing machine 2 and a bag making and packaging machine 3 (see FIG. 1). The bag making and packaging machine 3 includes a bag making and packaging unit 3a (see FIG. 1), a film supply unit 3b (see FIG. 1), and a controller 90 (see FIG. 3).

  The combination weighing machine 2 is disposed above the bag making and packaging unit 3a (see FIG. 1). In the combination weighing machine 2, the weight of the article C (package) is weighed by a plurality of weighing hoppers, and these weights are combined so as to have a predetermined total weight. Is discharged downward.

  The bag making and packaging unit 3 a of the bag making and packaging machine 3 packs the articles C in accordance with the timing at which the articles C are supplied from the combination weighing machine 2. The film supply unit 3b supplies the film F for packaging used as the bag B to the bag making packaging unit 3a. The controller 90 of the bag making and packaging machine 3 controls the operations of the bag making and packaging unit 3a and the film supply unit 3b.

  The weighing packaging device 1 is provided with an operation switch 4 for operating the weighing packaging device 1 (see FIG. 1). In addition, the weighing and packaging apparatus 1 is provided with a touch panel type display 5 that displays an operation state of the weighing and packaging apparatus 1 and receives input of various settings to the weighing and packaging apparatus 1 (see FIG. 1). The operation switch 4 and the touch panel display 5 function as an input unit that receives instructions for the combination weighing machine 2 and the bag making and packaging machine 3, settings related to the combination weighing machine 2 and the bag making and packaging machine 3, and the like. The touch panel display 5 functions as an output unit that displays various types of information related to the combination weighing machine 2 and the bag making and packaging machine 3. In the present embodiment, the operation switch 4 and the touch panel display 5 are shared by the combination weighing machine 2 and the bag making and packaging machine 3, but are not limited to this, and the operation switch and the touch panel display are classified by device. May be provided.

  The operation switch 4 and the touch panel display 5 are electrically connected to a controller 2a that controls the operation of the combination weighing machine 2 and a controller 90 that controls the operation of the bag making and packaging machine 3 (see FIG. 3). . The controller 2 a and the controller 90 control the combination weighing machine 2 and the bag making and packaging machine 3 based on inputs to the operation switch 4 and the touch panel display 5, respectively. The controller 2a and the controller 90 take in necessary information from various sensors (not shown) installed in the combination weighing machine 2 and the bag making and packaging machine 3, and use the information to use the combination weighing machine 2 and the manufacturing machine. Each of the bag packaging machines 3 is controlled. In the present embodiment, the combination weighing machine 2 and the bag making and packaging machine 3 include the controller 2a and the controller 90, respectively, but are not limited thereto. Instead of the individual controllers 2 a and 90, a controller that controls both the combination weighing machine 2 and the bag making and packaging machine 3 may be provided.

(2) Detailed configuration of bag making and packaging machine The details of the bag making and packaging machine 3 will be described.

  In the following description, expressions such as “front (front)”, “rear (back)”, “up”, “down”, “left”, “right”, etc. may be used to indicate the direction. Here, “front (front)”, “rear (back)”, “up”, “down”, “left”, and “right” are defined as shown in FIG. Unless otherwise specified, expressions such as “front (front)”, “rear (back)”, “up”, “down”, “left”, and “right” are used according to the definition of FIG. In addition, the expressions “upstream” and “downstream” may be used, but unless otherwise specified, “upstream” and “downstream” are based on the transport direction of the film F.

(2-1) Bag making and packaging unit The bag making and packaging unit 3a will be described below.

  The bag making and packaging unit 3a mainly includes a forming mechanism 13, a pull-down belt mechanism 14, a vertical sealing mechanism 20, and a horizontal sealing mechanism 30 (see FIG. 2).

  The forming mechanism 13 forms the sheet-like film F conveyed from the film supply unit 3b into a cylindrical shape. The pull-down belt mechanism 14 conveys a tubular film F (hereinafter referred to as a tubular film Fc) downward. The vertical sealing mechanism 20 seals the overlapping portion (joint) of the tubular film Fc in the vertical direction. The horizontal sealing mechanism 30 seals the tubular film Fc transported downward in the lateral direction, in other words, along the direction intersecting the transport direction with the tubular film Fc transported downward. By sealing, the upper and lower ends of the bag B are sealed.

(2-1-1) Forming Mechanism The forming mechanism 13 includes a tube 13b and a former 13a.

  The tube 13b is a cylindrical member, and the upper and lower ends are open. The article C weighed by the combination weighing machine 2 is put into the opening at the upper end of the tube 13b.

  The former 13a is disposed so as to surround the tube 13b. The sheet-like film F fed out from the film roll of the film supply unit 3b is formed into a cylindrical shape when passing between the former 13a and the tube 13b. The tube 13b and the former 13a of the forming mechanism 13 can be replaced according to the size of the bag B to be manufactured.

(2-1-2) Pull-down belt mechanism The pull-down belt mechanism 14 adsorbs the cylindrical film Fc wound around the tube 13b and continuously conveys it downward. As shown in FIG. 2, the pull-down belt mechanism 14 has a pair of belts 14 c arranged so as to sandwich the tube 13 b on the left and right sides of the tube 13 b. In the pull-down belt mechanism 14, the belt 14c having an adsorption function is rotated by the driving roller 14a and the driven roller 14b, so that the tubular film Fc is conveyed downward. In FIG. 2, a roller drive motor that rotates the drive roller 14a and the like is not shown.

(2-1-3) Vertical Sealing Mechanism The vertical sealing mechanism 20 is configured so that the overlapping portion (joint) of the tubular film Fc of the tubular film Fc conveyed downward by the pull-down belt mechanism 14 is in the longitudinal direction (see FIG. In FIG. 2, ultrasonic sealing is performed in the vertical direction.

  The vertical seal mechanism 20 mainly includes a horn 21, an anvil 22, an ultrasonic transducer 23, an ultrasonic oscillator 24, and an air cylinder 25 (see FIGS. 3 and 4).

  The horn 21 is disposed on the front side of the tube 13b (see FIG. 4). The horn 21 is connected to the ultrasonic transducer 23 (see FIG. 4). The horn 21 is ultrasonically vibrated by transmitting the ultrasonic wave generated by the ultrasonic vibrator 23. The ultrasonic oscillator 24 converts a relatively low frequency (for example, 50 Hz or 60 Hz) electrical signal supplied from a power source into a high frequency (for example, 20 kHz) electrical signal and outputs the electrical signal. When a high-frequency electric signal output from the ultrasonic oscillator 24 is applied, the ultrasonic vibrator 23 converts the applied electric signal into mechanical vibration energy and generates ultrasonic waves.

  Note that the ultrasonic oscillator 24 is configured to output a high-frequency electrical signal that causes the ultrasonic transducer 23 to oscillate at a fundamental frequency described later when there is no input of a correction value from the outside as described later. Yes. The ultrasonic oscillator 24 oscillates at an oscillation frequency obtained by adding the correction value to the basic frequency when the correction value is input from the outside (specifically, from the controller 90). It is configured to output a high-frequency electrical signal. The correction value will be described later. Note that the oscillation frequency of the ultrasonic vibrator 23 when the cylindrical film Fc is sealed is controlled by the controller 90. Control of the oscillation frequency of the ultrasonic transducer 23 by the controller 90 will be described later.

  The ultrasonic oscillator 24 is configured to be able to output an operation frequency equivalent signal corresponding to the actual vibration frequency (operation frequency) of the ultrasonic transducer 23.

  The anvil 22 is attached to the front side of the outer peripheral surface of the tube 13b (see FIG. 4). The anvil 22 is disposed to face the front end surface of the horn 21 (see FIG. 4).

  The air cylinder 25 is disposed above the ultrasonic transducer 23 (see FIG. 4). The air cylinder 25 reciprocates in the horizontal direction so that the horn 21 approaches the anvil 22 or moves away from the anvil 22. In other words, the air cylinder 25 reciprocates the horn 21 in the front-rear direction. When the air cylinder 25 moves the horn 21 toward the anvil 22, the overlapping portion (joint) of the tubular film Fc is sandwiched between the horn 21 and the anvil 22 and pressurized. When the horn 21 is ultrasonically vibrated with the tubular film Fc sandwiched between the horn 21 and the anvil 22, the tubular film Fc is heated and melted by the ultrasonic vibration, and the tubular film Fc The overlapping portion is ultrasonically sealed.

(2-1-4) Horizontal Seal Mechanism The horizontal seal mechanism 30 horizontally seals the tubular film Fc conveyed downward along a direction intersecting the conveyance direction of the tubular film Fc.

  The horizontal seal mechanism 30 mainly includes a first rotating body 50a (see FIG. 5), a second rotating body 50b (see FIG. 5), a horizontal driving mechanism 55 (see FIG. 5), and ultrasonic oscillators 40a and 40b (see FIG. 5). 3). The first rotating body 50a is disposed on the back side of the tubular film Fc (left side in FIG. 5). The 2nd rotary body 50b is arrange | positioned at the front side of the cylindrical film Fc (right side in FIG. 5). The horizontal direction driving mechanism 55 moves the first rotating body 50a and the second rotating body 50b horizontally in the front-rear direction (left-right direction in FIG. 5) so as to approach each other or away from each other.

  The first rotating body 50a includes a first horn 51a and a second anvil 52b for ultrasonic sealing (see FIG. 5). Moreover, the 1st rotary body 50a has the 1st ultrasonic transducer | vibrator 41 connected with the 1st horn 51a (refer FIG. 7). The second anvil 52b is disposed at a position 180 degrees away from the first horn 51a and the rotation axis A1 of the first rotating body 50a (see FIG. 5). The 2nd rotary body 50b has the 1st anvil 51b for ultrasonic sealing, and the 2nd horn 52a (refer FIG. 5). Moreover, the 2nd rotary body 50b has the 2nd ultrasonic transducer | vibrator 42 connected with the 2nd horn 52a (refer FIG. 7). The second horn 52a is disposed at a position 180 degrees away from the first anvil 51b and the rotation axis A2 of the second rotating body 50b (see FIG. 5).

  As will be described later, the first rotator 50a and the second rotator 50b are rotated about the rotation axes A1 and A2, respectively, so that the first horn 51a and the first anvil 51b or the second horn 52a and The tubular film Fc is sandwiched between the second anvil 52b and the tubular film Fc is laterally sealed.

  The first rotating body 50a and the second rotating body 50b will be described in more detail.

  As shown in FIG. 7, the first rotating body 50 a is rotatably supported by the turning shaft 64 and the turning shaft 65, the lever 61 d and the lever 62 d that are rotatably supported by the turning shaft 64, and the turning shaft 65. Lever 61e and lever 62e. The turning shaft 64 is fixed to a first horizontal moving plate 71a (see FIG. 5), which will be described later, disposed on the left side of the first rotating body 50a. The turning shaft 65 is fixed to a first horizontal moving plate 71a, which will be described later, disposed on the right side of the first rotating body 50a. The left end portion of the first horn 51a is fixed to the end portion of the lever 61d supported by the turning shaft 64 (see FIG. 7). The right end of the first horn 51a is fixed to the end of a lever 61e supported by the turning shaft 65 (see FIG. 7). Further, the left end portion of the second anvil 52b is fixed to the end portion of the lever 62d supported by the turning shaft 64 (see FIG. 7). The right end portion of the second anvil 52b is fixed to the end portion of the lever 62e supported by the turning shaft 65 (see FIG. 7).

  As shown in FIG. 7, the second rotating body 50 b is rotatably supported by the turning shaft 66 and the turning shaft 67, the lever 61 f and the lever 62 f that are rotatably supported by the turning shaft 66, and the turning shaft 67. A lever 61g and a lever 62g. The turning shaft 66 is fixed to a second horizontal moving plate 71b (see FIG. 5), which will be described later, disposed on the left side of the second rotating body 50b. The turning shaft 67 is fixed to a second horizontal moving plate 71b, which will be described later, disposed on the right side of the second rotating body 50b. The left end portion of the first anvil 51b is fixed to the end portion of the lever 61f supported by the turning shaft 66 (see FIG. 7). The right end portion of the first anvil 51b is fixed to the end portion of the lever 61g supported by the turning shaft 67 (see FIG. 7). The left end of the second horn 52a is fixed to the end of the lever 62f supported by the turning shaft 66 (see FIG. 7). The right end portion of the second horn 52a is fixed to the end portion of the lever 62g supported by the turning shaft 67 (see FIG. 7).

  The first rotating body 50a and the second rotating body 50b have drive motors 54a and 54b, respectively (see FIG. 3). The first rotator 50a and the second rotator 50b are driven by drive motors 54a and 54b, and rotate about rotation axes A1 and A2 extending in the horizontal sealing direction (left-right direction), respectively (see FIG. 7). Thus, the first horn 51a and the second anvil 52b rotate around the rotation axis A1, and the first anvil 51b and the second horn 52a rotate around the rotation axis A2 (see FIG. 6). As shown in FIG. 6, the first rotating body 50a rotates around the rotation axis A1 in the clockwise direction when viewed from the left side. On the other hand, the second rotating body 50b rotates counterclockwise around the rotation axis A2 when viewed from the left side as shown in FIG.

  The horizontal direction drive mechanism 55 drives the 1st rotary body 50a and the 2nd rotary body 50b in the front-back direction as follows.

  Both ends of the first rotating body 50a are supported by a first horizontal moving plate 71a (see FIG. 5) in the left-right direction. More specifically, the turning shafts 64 and 65 of the first rotating body 50a are supported by the first horizontal moving plate 71a. Further, the second rotating body 50b is supported at both ends thereof in the left-right direction by a second horizontal moving plate 71b (see FIG. 5). More specifically, the turning shafts 66 and 67 of the second rotating body 50b are supported by the second horizontal moving plate 71b. The horizontal driving mechanism 55 drives the first horizontal moving plate 71a and the second horizontal moving plate 71b so as to approach or separate from each other in a side view (see arrows in FIG. 5).

  The horizontal driving mechanism 55 will be described in detail.

  The horizontal driving mechanism 55 includes a servo motor 80, a ball screw 80a, a first nut 81, a second nut 82, a first connecting rod 85, and a second connecting rod 86 (see FIG. 5).

  The ball screw 80a is driven to rotate by a servo motor 80 (see FIG. 5). The first nut 81 and the second nut 82 are screwed into the ball screw 80a. A portion where the ball screw 80a is screwed with the first nut 81 and a portion where the ball screw 80a is screwed with the second nut 82 are reverse screws. The first connecting rod 85 connects the first nut 81 and the second horizontal movement plate 71b. In FIG. 5, only a side view seen from the left side is shown, but the second horizontal moving plate 71 b arranged on the right side (not shown) is also connected to the first nut 81 by the first connecting rod 85. The first connecting rod 85 is not connected to the first horizontal movement plate 71a, and extends through the first horizontal movement plate 71a so as to be slidable. The first connecting rod 85 is provided so as to extend along the moving direction of the first horizontal moving plate 71a and the second horizontal moving plate 71b (in the front-rear direction in FIG. 2). The second connecting rod 86 connects the second nut 82 and the first horizontal movement plate 71a. In FIG. 6, only a side view seen from the left side is shown, but the first horizontal moving plate 71 a arranged on the right side (not shown) is also connected to the second nut 82 by the second connecting rod 86. Similarly to the first connecting rod 85, the second connecting rod 86 is also provided to extend along the moving direction of the first horizontal moving plate 71a and the second horizontal moving plate 71b (in the front-rear direction in FIG. 2). .

  When the ball screw 80a is rotated by the servo motor 80, the first horizontal moving plate 71a and the second horizontal moving plate 71b move horizontally so as to approach or separate from each other in the side view (the arrow in FIG. 5). reference).

  The horizontal movement of the first rotating body 50a and the second rotating body 50b by the horizontal direction driving mechanism 55 and the rotation operation of the first rotating body 50a and the second rotating body 50b are combined, and the first horn 51a and the second anvil are combined. 52b, the first anvil 51b and the second horn 52a are swiveled in a D shape in a side view (refer to the trajectory of the horn and anvil shown in FIG. 6 by a two-dot chain line. (See the arrow in the part.) The paired horn and anvil, that is, the first horn 51a and the first anvil 51b, or the second horn 52a and the second anvil 52b, sandwich the tubular film Fc from the front side and the back side with a predetermined pressure. Ultrasonic sealing is performed while moving linearly in the vertical direction.

  The ultrasonic sealing by the 1st horn 51a and the 1st anvil 51b or the 2nd horn 52a and the 2nd anvil 52b is further demonstrated.

  As described above, the first horn 51a and the second horn 52a are connected to the first ultrasonic transducer 41 and the second ultrasonic transducer 42, respectively. The first ultrasonic transducer 41 and the second ultrasonic transducer 42 are electrically connected to the ultrasonic oscillators 40a and 40b, respectively. The ultrasonic oscillators 40a and 40b convert a relatively low frequency (for example, 50 Hz or 60 Hz) electrical signal supplied from a power source into a high frequency (for example, 20 kHz) electrical signal and output the electrical signal. The first and second ultrasonic transducers 41 and 42, when a high-frequency electric signal output from the ultrasonic oscillators 40a and 40b is applied, converts the applied electric signal into mechanical vibration energy, and generates ultrasonic waves. Is generated.

  Note that the ultrasonic oscillators 40a and 40b are high-frequency electric waves that cause the first and second ultrasonic transducers 41 and 42 to vibrate at a fundamental frequency described later when there is no input of a correction value from the outside as described later. It is configured to output a signal. Further, when there is an input of a correction value from the outside (specifically, from the controller 90), the ultrasonic oscillators 40a and 40b allow the first and second ultrasonic transducers 41 and 42 to set the correction value to the fundamental frequency. It is configured to output a high-frequency electrical signal that oscillates at the added oscillation frequency. The correction value will be described later.

  Further, the ultrasonic oscillators 40a and 40b are configured to be able to output an operation frequency equivalent signal corresponding to the actual vibration frequency (operation frequency) of the first ultrasonic transducer 41 and the second ultrasonic transducer 42. .

  The first horn 51a transmits the ultrasonic waves generated by the first ultrasonic transducer 41, and the second horn 52a transmits the ultrasonic waves generated by the second ultrasonic transducer 42. Then, it vibrates ultrasonically. Note that the oscillation frequency of the first and second ultrasonic transducers 41 and 42 when the cylindrical film Fc is sealed is controlled by the controller 90. Control of the oscillation frequency of the first and second ultrasonic transducers 41 and 42 by the controller 90 will be described later.

  When the first horn 51a is ultrasonically vibrated while the first horn 51a and the first anvil 51b move linearly in the vertical direction while sandwiching the tubular film Fc with a predetermined pressure, the tubular film Fc Is heated and melted by ultrasonic vibration, and the cylindrical film Fc is ultrasonically sealed in the lateral direction. When the second horn 52a is ultrasonically vibrated while the second horn 52a and the second anvil 52b linearly move in the vertical direction while sandwiching the tubular film Fc with a predetermined pressure, the tubular film Fc Is heated and melted by ultrasonic vibration, and the cylindrical film Fc is ultrasonically sealed in the lateral direction.

  After the tubular film Fc is laterally sealed between the first horn 51a and the first anvil 51b, or between the second horn 52a and the second anvil 52b, the first anvil 51b and the second anvil. The packaged bags B are cut off from the tubular film Fc by the knives 53 (see FIG. 7) respectively provided on the 52b, and the bags B are discharged from below the bag making and packaging machine 3.

  In the bag making and packaging machine 3, immediately before the tubular film Fc is sandwiched between the first horn 51a and the first anvil 51b and between the second horn 52a and the second anvil 52b, The squeezing operation is performed by squeezing the tubular film Fc between the first horn 51a and the first anvil 51b and between the second horn 52a and the second anvil 52b.

  The ironing operation means that the first horn 51a and the first horn 51a and the first anvil 51b and the second horn 52a and the second anvil 52b are maintained with a small gap (for example, 1 mm). In this operation, the first anvil 51b or the second horn 52a and the second anvil 52b are linearly moved downward. By performing the squeezing operation before the horizontal seal, the article C can be prevented from being caught in the horizontal seal portion of the tubular film Fc.

(2-2) Film supply unit The film supply unit 3b is a unit which supplies the sheet-like film F with respect to the shaping | molding mechanism 13 of the bag making packaging unit 3a. The film supply unit 3b is provided adjacent to the bag making and packaging unit 3a. A roll (not shown) around which the film F is wound is set in the film supply unit 3b, and the film F is fed out from this roll.

(2-3) Controller The controller 90 controls the operation of each part of the bag making and packaging machine 3.

  The controller 90 includes a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), a flash memory, and the like. The controller 90 controls the operation of each part of the bag making and packaging machine 3 by reading and executing the program in the flash memory. In addition, the structure of the controller 90 is an illustration and is not limited to this. The controller 90 should just be what can control the operation | movement of each part of the bag making packaging machine 3 as follows.

  The controller 90 is electrically connected to the bag making and packaging unit 3a. Specifically, the controller 90 includes the pull-down belt mechanism 14, the air cylinder 25 and the ultrasonic oscillator 24 of the vertical seal mechanism 20, the servo motor 80 of the horizontal seal mechanism 30, and the drive motor 54a that the bag making and packaging unit 3a has. , 54b and the ultrasonic oscillators 40a, 40b (see FIG. 3). The controller 90 is electrically connected to the film supply unit 3b (see FIG. 3). The controller 90 controls the operation of these electrically connected configurations.

  The controller 90 is connected to the operation switch 4 and the touch panel display 5 (see FIG. 3), receives various signals and various information from the operation switch 4 and the touch panel display 5, and receives the bag making and packaging machine 3 on the touch panel display 5. Outputs various information such as the operating state. The controller 90 is also electrically connected to the controller 2a of the combination weighing machine 2 (see FIG. 3), receives various information transmitted by the controller 2a, and transmits various information to the controller 2a.

  The controller 90 functions as one of the functions of the ultrasonic vibrator 23 of the vertical seal mechanism 20 and the first and second ultrasonic vibrators 41 of the horizontal seal mechanism 30 when the cylindrical film Fc is vertically sealed and horizontally sealed. , 42 are respectively oscillated at a predetermined oscillation frequency (a suitable oscillation frequency calculated by a calculation unit 92 described later). The control executed by the controller 90 for vibrating the ultrasonic transducer 23 and the first and second ultrasonic transducers 41 and 42 at a predetermined oscillation frequency will be described later.

  The controller 90 includes a setting storage unit 91 and a calculation unit as functional units used to vibrate the ultrasonic transducer 23 and the first and second ultrasonic transducers 41 and 42 at predetermined oscillation frequencies, respectively. 92.

(2-3-1) Setting storage unit In the setting storage unit 91, the ultrasonic transducer 23 calculated by the calculation unit 92 for the packaging conditions of the bag making and packaging machine 3 and the packaging conditions, Information on the oscillation frequency with the second ultrasonic transducers 41 and 42 is stored. Information on the oscillation frequencies of the ultrasonic transducer 23 and the first and second ultrasonic transducers 41 and 42 will be described later. The packaging conditions of the bag making and packaging machine 3 include, for example, the following items. However, the following packaging conditions are examples, and it is not necessary to include all these items. Further, the packaging conditions need not be limited to the contents of the following items.
1) Size of bag B to be made (for example, length and width)
2) Type of packaging film (film F) (for example, material and thickness)
3) Bag making capacity (the number of bags B made per minute by the bag making and packaging machine 3)
4) Sealing time of each of the vertical seal and the horizontal seal 5) Ironing length and ironing width of the ironing operation of the horizontal sealing mechanism 30 6) Seal pressure of the vertical sealing mechanism 20 and the horizontal sealing mechanism 30 (a pair of horn and anvil) Pressure to sandwich the tubular film Fc between the two)
7) Amplitude of each of the ultrasonic transducer 23 and the first and second ultrasonic transducers 41 and 42 8) Between the ultrasonic transducer 23 and the first and second ultrasonic transducers 41 and 42 , Each vibration time

(2-3-2) Calculation Unit The calculation unit 92 is executed in advance during the trial operation (before actual operation) of the bag making and packaging machine 3, and based on the frequency-related information acquired when the cylindrical film Fc is sealed. A suitable oscillation frequency corresponding to the difference in packaging conditions is calculated. More specifically, the calculation unit 92 calculates a correction value for the fundamental frequency based on frequency-related information acquired at the time of sealing the tubular film Fc performed in advance during the trial operation of the bag making and packaging machine 3. A suitable oscillation frequency corresponding to the difference in packaging conditions is calculated. The oscillation frequency is represented by the sum of the fundamental frequency and the correction value.

  The fundamental frequency is initially set by the shape of the horn 21 used for the ultrasonic seal, and the first and second horns 51a and 52a, respectively. This is the oscillation frequency of the first and second ultrasonic transducers 41 and 42. A suitable oscillation frequency is an oscillation frequency that is desirably used during actual operation of the bag making and packaging machine 3.

  The calculation unit 92 calculates a suitable oscillation frequency for each of the ultrasonic transducer 23 and the first and second ultrasonic transducers 41 and 42, and the controller 90 performs the actual operation of the bag making and packaging machine 3. The reason why it is desirable to cause the ultrasonic transducer 23 and the first and second ultrasonic transducers 41 and 42 to oscillate at suitable calculated oscillation frequencies will be described below.

  When the cylindrical film Fc is sandwiched between the horn 21 and the anvil 22 and the ultrasonic vibrator 23 is oscillated at the fundamental frequency for the ultrasonic vibrator 23 to perform the ultrasonic sealing, the ultrasonic oscillator 24 uses the ultrasonic wave. Even if the frequency of the electric signal applied to the vibrator 23 is not changed, the vibration frequency (operating frequency) of the ultrasonic vibrator 23 fluctuates with respect to the fundamental frequency during the ultrasonic sealing. Further, the tubular film Fc is sandwiched between the first horn 51a and the first anvil 51b or between the second horn 52a and the second anvil 52b, and the first or second ultrasonic transducers 41 and 42 are inserted. Is oscillated at the fundamental frequency for the first and second ultrasonic transducers 41 and 42, and ultrasonic sealing is performed, the ultrasonic oscillators 40a and 40b apply to the first or second ultrasonic transducers 41 and 42. Even if the electrical signal is not changed, the vibration frequency (operating frequency) of the first or second ultrasonic transducer 41 or 42 varies with respect to the fundamental frequency during the ultrasonic sealing. Depending on the packaging conditions (see (2-3-1)), the operating frequency of the ultrasonic transducer 23 or the first and second ultrasonic transducers 41 and 42 may be out of the proper range. Therefore, in order to avoid that the operating frequency of the ultrasonic transducer 23 or the first and second ultrasonic transducers 41 and 42 is out of the appropriate range, the basic frequency is corrected according to the difference in packaging conditions, It is desirable to adjust to a suitable oscillation frequency.

  Note that fluctuations in the operating frequency of the ultrasonic transducer 23 include, for example, the size of the bag B, the type of film F, the sealing time of the vertical seal, the seal pressure of the vertical seal mechanism 20, the amplitude and vibration of the ultrasonic transducer 23. Packaging conditions such as time have an effect. Variations in the operating frequency of the first and second ultrasonic transducers 41 and 42 include, for example, the size of the bag B, the type of the film F, the sealing time of the horizontal seal, the ironing length and ironing of the ironing operation of the horizontal seal mechanism 30. Packaging conditions such as width, seal pressure of the lateral seal mechanism 30, amplitude and vibration time of the first and second ultrasonic transducers 41 and 42 are affected.

  In the following, a preferable oscillation frequency calculation process by the calculation unit 92 will be described with reference to the flowchart of FIG. Here, the calculation of the suitable oscillation frequency f2 (basic frequency f0 + correction value f1) of the first and second ultrasonic transducers 41 and 42 by the calculation unit 92 will be described as an example. The calculation process of the suitable oscillation frequency of the ultrasonic transducer 23 by the calculation unit 92 is the same as the calculation process of the suitable oscillation frequency f2 of the first and second ultrasonic transducers 41 and 42, and thus description thereof is omitted. To do.

  First, in step S <b> 1, a target packaging condition for calculating a suitable oscillation frequency is input from the touch panel display 5. The input packaging conditions are stored in the setting storage unit 91. Thereafter, the process proceeds to step S2.

  In step S2, the calculation unit 92 performs frequency-related information acquisition processing used for calculation of the oscillation frequency f2.

  The frequency-related information acquisition process in step S <b> 1 is started when a command (frequency-related information acquisition command) for performing the frequency-related information acquisition process is input to the touch panel display 5. When the frequency related information acquisition command is input to the touch panel display 5, the combination weighing machine 2 is not operated, and only the bag making and packaging machine 3 is operated. That is, the bag making and packaging machine 3 performs only the operation of forming the tubular film Fc from the film F and making the bag B without receiving the supply of the article C from the combination weighing machine 2. The bag making and packaging machine 3 executes the operation of making the bag B only once. Here, when performing ultrasonic sealing by sandwiching the tubular film Fc between the first horn 51a and the first anvil 51b or between the second horn 52a and the second anvil 52b, an ultrasonic oscillator is used. 40a and 40b apply an electrical signal to the first or second ultrasonic transducer 41 or 42 so that the first or second ultrasonic transducer 41 or 42 oscillates at the fundamental frequency f0. While the ultrasonic sealing is performed between the first horn 51a and the first anvil 51b or between the second horn 52a and the second anvil 52b, the calculation unit 92 outputs the ultrasonic oscillators 40a and 40b. The vibration frequency equivalent signal (the signal corresponding to the actual operating frequency of the first ultrasonic transducer 41 and the second ultrasonic transducer 42) is continuously acquired as frequency related information.

  In step S3, the calculation unit 92 grasps the change in the operating frequency of the first or second ultrasonic transducer 41, 42 based on the frequency related information (vibration frequency equivalent signal) acquired in step S2, and calculates this. Based on the fundamental frequency f0, the operating frequency of the first or second ultrasonic transducer 41, 42 is not deviated from the appropriate range (predetermined value) of the first and second ultrasonic transducers 41, 42. A correction value f1 is calculated. Since the preferable oscillation frequency f2 is the sum of the basic frequency f0 and the correction value f1, and the basic frequency f0 is an initial setting value, the calculation unit 92 calculates the correction value f1 with respect to the basic frequency f0. A simple oscillation frequency f2 is calculated. The correction value f1 may be a positive value or a negative value.

  In step S4, the correction value f1 calculated by the calculation unit 92 in step S3 is stored in the setting storage unit 91 as information regarding the oscillation frequency f2 for the packaging condition input in step S1.

(3) Operation at the time of actual operation of the bag making and packaging machine Actual operation of the bag making and packaging machine 3 (actually, supply of the article C from the combination weighing machine 2 and making the bag B containing the article C therein) (Operation) will be described.

  When an actual operation start command of the bag making and packaging machine 3 (operation start command of the weighing and packaging apparatus 1) is input to the operation switch 4 or the touch panel display 5, the controller 90 controls the pull-down belt mechanism 14 and the film supply unit 3b. To drive. As a result, the sheet-like film F is fed out from the film roll of the film supply unit 3b. The sheet-like film F fed out from the film roll reaches the forming mechanism 13. The forming mechanism 13 forms the sheet-like film F into a cylindrical film Fc. At this time, the left and right edges of the sheet-like film F are overlapped in the vertical direction.

  The cylindrical film Fc having the overlapping part in the vertical direction is conveyed to the vertical sealing mechanism 20 along the tube 13b. The vertical sealing mechanism 20 performs vertical sealing by ultrasonically sealing overlapping portions (joints) extending in the vertical direction of the tubular film Fc. When the tubular film Fc is sandwiched between the horn 21 and the anvil 22 and ultrasonic sealing is performed, the controller 90 sets the correction value of the ultrasonic transducer 23 stored in the setting storage unit 91 to the super value. Output to the sound wave oscillator 24. As a result, the ultrasonic transducer 23 has a predetermined oscillation frequency (the oscillation frequency for the ultrasonic transducer 23 calculated by the calculation unit 92, in other words, the sum of the basic frequency and the correction value for the ultrasonic transducer 23). ) Vibrate.

  The vertically sealed tubular film Fc is transported to the lateral seal mechanism 30 located below the tube 13b, that is, downstream of the tube 13b in the transport direction of the tubular film Fc. At this timing, the article C falls into the tubular film Fc from the combination weighing machine 2 through the inside of the tube 13b. The controller 90 requests the controller 2a of the combination weighing machine 2 to insert the article C at an appropriate timing.

  The horizontal sealing mechanism 30 ultrasonically seals a predetermined position of the cylindrical film Fc in the left-right direction in a state where the article C is filled in the cylindrical film Fc. When the cylindrical film Fc is sandwiched between the first horn 51a and the first anvil 51b or between the second horn 52a and the second anvil 52b and ultrasonic sealing is performed, the controller 90 is The correction values f1 for the first and second ultrasonic transducers 41 and 42 stored in the setting storage unit 91 are output to the ultrasonic oscillators 40a and 40b. As a result, the first and second ultrasonic transducers 41 and 42 have a predetermined oscillation frequency f2 (the oscillation frequency f2 for the first and second ultrasonic transducers 41 and 42 calculated by the calculation unit 92, in other words, And the fundamental frequency f0 and the correction value f1 for the first and second ultrasonic transducers 41 and 42).

  Further, in the lateral sealing mechanism 30, a part of the laterally sealed portion of the tubular film Fc is cut by the knife 53 in the left-right direction. As a result, the bag B is separated from the tubular film Fc.

(4) Features Features of the bag making and packaging machine 3 according to the present embodiment will be described below.

(4-1)
The bag making and packaging machine 3 according to the present embodiment includes an anvil (anvil 22, first anvil 51b, and second anvil 52b), a horn (horn 21, first horn 51a, and second horn 52a), and an ultrasonic wave. A vibrator (the ultrasonic vibrator 23, the first ultrasonic vibrator 41, and the second ultrasonic vibrator 42) and a controller 90 as a control unit are provided. The horn 21 sandwiches a tubular film Fc as an example of a packaging film between the anvil 22 and performs vertical sealing of the tubular film Fc. The first horn 51a sandwiches a cylindrical film Fc as an example of a packaging film between the first anvil 51b and performs horizontal sealing of the cylindrical film Fc. The second horn 52a sandwiches the tubular film Fc between the second anvil 52b and performs horizontal sealing of the tubular film Fc. The ultrasonic transducer 23 is connected to the horn 21. The first and second ultrasonic transducers 41 and 42 are connected to the first horn 51a and the second horn 52a, respectively. The controller 90 vibrates the ultrasonic transducer 23 and the first and second ultrasonic transducers 41 and 42 at a predetermined oscillation frequency when sealing the tubular film Fc. The controller 90 includes a calculation unit 92 that calculates a suitable oscillation frequency corresponding to a difference in packaging conditions based on frequency-related information (vibration frequency equivalent signal) acquired at the time of sealing the cylindrical film Fc performed in advance. .

  Here, since a suitable oscillation frequency is calculated for each packaging condition based on the frequency-related information (vibration frequency equivalent signal) acquired at the time of sealing the cylindrical film Fc performed in advance, the ultrasonic wave is used regardless of the packaging conditions. A highly reliable bag making and packaging machine 3 that can easily operate the vibrator 23 and the first and second ultrasonic vibrators 41 and 42 at an optimum operating frequency can be realized.

(4-2)
In the bag making and packaging machine 3 according to the present embodiment, the calculation unit 92 calculates a suitable oscillation frequency by calculating a correction value for the fundamental frequency.

  Here, since the calculation unit 92 calculates a correction value for each packaging condition with respect to the fundamental frequency to calculate a suitable oscillation frequency, the ultrasonic vibrator 23 and the first frequency are calculated regardless of the packaging conditions. In addition, it is possible to realize a highly reliable bag making and packaging machine 3 in which the second ultrasonic transducers 41 and 42 can be easily operated at an optimum operating frequency.

(4-3)
In the bag making and packaging machine 3 according to the present embodiment, the calculation unit 92 is acquired at the time of sealing the tubular film Fc performed in advance without supplying the article C as the packaged article to the bag making and packaging machine 3. Based on the frequency-related information (vibration frequency equivalent signal), a suitable oscillation frequency corresponding to the difference in packaging conditions is calculated.

  Here, since a suitable oscillation frequency is calculated based on frequency-related information (vibration frequency equivalent signal) acquired at the time of sealing performed in a state where the article C is not supplied, normally, such as biting of the article C, is not normal. The oscillation frequency is not calculated based on inappropriate frequency-related information obtained during the non-sealing operation. Therefore, a highly reliable bag making and packaging machine 3 can be realized. Such a configuration is particularly effective in calculating a suitable oscillation frequency of the first and second ultrasonic transducers 41 and 42.

(4-4)
In the bag making and packaging machine 3 according to the present embodiment, the calculation unit 92 uses a difference in the type of the tubular film Fc (film F), for example, the material of the film F as a suitable oscillation frequency according to the difference in packaging conditions. A suitable oscillation frequency corresponding to the thickness is calculated.

  Here, since a suitable oscillation frequency is calculated according to the difference in the type of the film F, the ultrasonic vibrator 23 and the first and second ultrasonic vibrators 41 and 42 Can be operated at an optimum operating frequency.

(5) Modifications Modifications of the present embodiment are shown below. The following modifications may be combined as appropriate with one or a plurality of other modifications as long as they are consistent with each other.

(5-1) Modification A
The bag making and packaging machine 3 of the above embodiment ultrasonically seals the tubular film Fc in the vertical direction and the horizontal direction, but the ultrasonic packaging machine according to the present invention is limited to the bag making and packaging machine 3 according to the above embodiment. Is not to be done. For example, in the above embodiment, ultrasonic sealing is performed in both the vertical sealing mechanism 20 and the horizontal sealing mechanism 30, but the present invention is not limited to this, and only one of them performs ultrasonic sealing. Good.

(5-2) Modification B
In the bag making and packaging machine 3 of the above embodiment, the calculation unit 92 of the controller 90 calculates a suitable oscillation frequency for the ultrasonic transducer 23 and the first and second ultrasonic transducers 41 and 42. However, the present invention is not limited to this, and a suitable oscillation frequency may be calculated only for one of the ultrasonic transducer 23 and the first and second ultrasonic transducers 41 and 42. Good. However, it is desirable that a suitable oscillation frequency is calculated for both the ultrasonic transducer 23 and the first and second ultrasonic transducers 41 and 42.

(5-3) Modification C
In the bag making and packaging machine 3 of the above embodiment, the calculation unit 92 of the controller 90 calculates a correction value for the fundamental frequency to calculate a suitable oscillation frequency, but is not limited to this. The calculation unit 92 may calculate a suitable oscillation frequency itself instead of the correction value. The controller 90 is configured to transmit the value of the oscillation frequency to the ultrasonic oscillator 24 and the ultrasonic oscillators 40a and 40b instead of transmitting the correction value to the ultrasonic oscillator 24 and the ultrasonic oscillators 40a and 40b. Also good. In this case, if the ultrasonic oscillator 24 and the ultrasonic oscillators 40a and 40b vibrate the ultrasonic transducer 23 and the first and second ultrasonic transducers 41 and 42 at the received oscillation frequency, Good.

(5-4) Modification D
In the bag making and packaging machine 3 of the above embodiment, the calculation unit 92 of the controller 90 calculates a suitable oscillation frequency, but is not limited to this. For example, a suitable oscillation frequency may be calculated by a control unit (not shown) included in each of the ultrasonic oscillator 24 and the ultrasonic oscillators 40a and 40b. That is, the control unit (not shown) of the ultrasonic oscillator 24 functions as a control unit that vibrates the ultrasonic transducer 23 at a predetermined oscillation frequency, and calculates a suitable oscillation frequency of the ultrasonic transducer 23. You may have. The control units (not shown) of the ultrasonic oscillators 40a and 40b function as control units that vibrate the first and second ultrasonic transducers 41 and 42 at a predetermined oscillation frequency. You may have the calculating part which calculates the suitable oscillation frequency of the sound wave vibrators 41 and 42. FIG.

(5-5) Modification E
In the above-described embodiment, the calculation unit 92 performs a suitable oscillation based on the frequency related information (vibration frequency equivalent signal) obtained when the cylindrical film Fc is sealed in advance without supplying the article C during the trial operation. The frequency is calculated, but is not limited to this.

  For example, the calculation unit 92 is based on frequency-related information (vibration frequency equivalent signal) acquired when sealing the cylindrical film Fc performed by supplying the article C to the bag making and packaging machine 3 during the past actual operation. A suitable oscillation frequency corresponding to the difference in packaging conditions may be calculated.

  When configured in this way, a suitable oscillation frequency is calculated based on frequency-related information (vibration frequency equivalent signal) acquired during past actual operation. Thus, a suitable oscillation frequency can be updated. Therefore, for example, even when the temperature, humidity, and the like are packaging conditions that have a relatively large influence on the operating frequency of the ultrasonic transducer, it is always easy to obtain a suitable oscillation frequency.

(5-6) Modification F
In the setting storage unit 91 according to the embodiment described above, suitable oscillation frequencies calculated by the calculation unit 92 for a plurality of packaging conditions may be stored for each packaging condition. Then, for example, the controller 90 calls the oscillation frequency corresponding to the packaging condition based on the information specifying the packaging condition input from the touch panel display 5, and the ultrasonic transducer 23 and the first and second ultrasonic waves The vibrators 41 and 42 may be operated at the oscillating frequency called.

  Here, since information on suitable oscillation frequencies is stored in advance for each packaging condition, the film F changes when the packaging conditions change (for example, when packaging different articles C or making bags B of different sizes). It is easy to quickly change the ultrasonic oscillator to a suitable oscillation frequency without performing a trial run every time.

(5-7) Modification G
In the above embodiment, the calculation unit 92 calculates a suitable oscillation frequency based on the frequency related information (vibration frequency equivalent signal) acquired during one sealing operation, but is not limited to this.

  For example, the calculation unit 92 repeatedly executes the calculation of the correction value based on the frequency related information (vibration frequency equivalent signal) for a plurality of bag making operations, and based on the calculated correction values (for example, By calculating an average value or median value of a plurality of correction values), a suitable oscillation frequency corresponding to the difference in packaging conditions may be calculated.

(5-8) Modification H
In the above embodiment, the calculation unit 92 calculates one correction value based on the frequency related information (vibration frequency equivalent signal) acquired during one sealing operation, but is not limited thereto. . For example, the calculation unit 92 may calculate the correction value for each timing based on the frequency related information (vibration frequency equivalent signal) acquired during one sealing operation. In this case, the controller 90 does not always transmit the same correction value to the ultrasonic oscillator 24 and the ultrasonic oscillators 40a and 40b during one sealing operation, but transmits different correction values for each timing.

  The ultrasonic packaging machine according to the present invention is useful as a highly reliable ultrasonic packaging machine that makes it easy to operate a vibrator at an optimum operating frequency regardless of packaging conditions.

3 Bag making and packaging machine 21 Horn 22 Anvil 23 Ultrasonic vibrator 41 First ultrasonic vibrator (ultrasonic vibrator)
42 Second ultrasonic transducer (ultrasonic transducer)
51a 1st horn (horn)
51b 1st anvil (anvil)
52a Second horn (horn)
52b Second anvil (anvil)
90 Controller (control unit)
91 Setting storage unit (storage unit)
92 Calculation unit Fc Cylindrical film (wrapping film)

JP 2012-250766 A

Claims (6)

With anvil,
A horn that sandwiches the packaging film between the anvil and seals the packaging film;
An ultrasonic transducer coupled to the horn;
During sealing of the packaging film, and a control unit for vibrated with the ultrasonic transducer,
With
Wherein the control unit has been acquired during the sealing of the packaging film which has been previously performed, on the basis of the frequency-related information relating to the operating frequency of the ultrasonic vibrator, calculator for calculating the oscillation frequency corresponding to the difference of the packaging conditions have a, when the seal of the packaging film in actual operation, to vibrate the ultrasonic vibrator with the calculated the oscillation frequency,
Ultrasonic packaging machine. The arithmetic unit calculates a correction value for the basic frequency is an initial setting value, calculates the oscillation frequency is the sum of said correction value and said fundamental frequency,
The ultrasonic packaging machine according to claim 1. The arithmetic unit, the based on the frequency-related information acquired at the time of sealing the previously performed said packaging film without supplying objects to be packaged to the ultrasonic packaging machine, before according to the difference of the packaging conditions Symbol Calculate the oscillation frequency,
The ultrasonic packaging machine according to claim 1 or 2. The arithmetic unit, based on the frequency-related information acquired at the time of sealing of said performed by supplying objects to be packaged in the ultrasonic packaging machine in the past packaging film, before according to the difference of the packaging conditions Symbol Calculate the oscillation frequency,
The ultrasonic packaging machine according to claim 1 or 2. The arithmetic unit, a pre-Symbol oscillation frequency corresponding to the difference of the packaging conditions, calculates the pre Symbol oscillation frequency corresponding to a difference in the kind of the packaging film,
The ultrasonic packaging machine according to any one of claims 1 to 4. A storage unit;
Wherein the storage unit, information about the previous SL oscillation frequency calculated by the calculation unit is stored by said packaging conditions,
The ultrasonic packaging machine according to any one of claims 1 to 5.

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