JP7151997B2 - Vertical filling and packaging machine - Google Patents

Description

The present invention includes a weighing machine that weighs the amount of product filled in a packaging bag and drops the weighed product at a timing based on a drop command, and a packaging material feeding device that feeds cylindrical packaging material in the vertical direction. , and a lateral sealing device for laterally sealing the tubular packaging material to form a bag package in which the product is filled in the packaging bag formed prior to the tip side of the tubular packaging material. , relates to a vertical filling and packaging machine having a function of determining filling timing at which a packaging bag at the tip of a cylindrical packaging material is filled with a product dropped from a weighing machine.

Conventional filling and packaging machines, especially vertical filling and packaging machines in which the product is dropped and filled, do not have an indicator for the timing setting value when setting the supply timing of a new product, such as when changing a product. There is no choice but to set while watching the product actually falling. The present applicant has proposed a vertical bag-making and packaging system that controls the timing of discharging a product from a product supply device with respect to the timing of operation of a horizontal sealing portion that horizontally seals a cylindrical packaging material, as described in Patent Document 1, for example. and its timing control method.

This vertical bag-making, filling and packaging system generally includes a weighing machine as a product supply device that weighs articles to a predetermined weight (or quantity), and a cylindrical packaging material that receives the product discharged and dropped from the weighing machine. It consists of a vertical form-fill-seal machine for packaging. A vertical form-fill-seal machine is a device that packs products into bags. Usually, a former (cylinder-making machine) bends a web-like packaging material into a substantially cylindrical shape, and Cylindrical packaging by heat-sealing both side edge portions of a filling tube, which is guided by a surface and into which the product to be packaged is thrown and dropped into an internal space, and which is curved and formed outside the filling tube. A vertical sealing device that forms a material into a material, and a cylindrical packaging material containing products dropped into a filling cylinder is heat-sealed in the horizontal direction to seal the top of the previously manufactured packaging bag and the next packaging bag. a lateral sealing device forming a bottom seal of the A cutter device for cutting off the packaging bag can be incorporated in the lateral sealing device. The vertical form-fill-sealing machine also serves as a belt-shaped package in which the strip-shaped packaging material fed out from a roll formed by winding the strip-shaped packaging material is arranged outside the filling tube and is sandwiched between the filling tube and the packing material. Equipped with material feeding device.

The operation of each device (vertical sealing device, horizontal sealing device, and packaging material feeding device) of the weighing machine and the vertical form-fill-sealing machine is controlled by command signals from the control device (including the weighing control device and packaging control device). is controlled to perform the wrapping operation smoothly and continuously. That is, the packaging control device outputs a drop request signal requesting product drop to the weighing control device that controls the operation of the weighing machine, and in response to the product drop, the vertical sealing device of the vertical form-fill-seal packaging machine. , the operation timing and operation amount of the horizontal sealing device and packaging material feeding device are controlled so that the falling product can be correctly filled and packaged in the packaging bag. Regarding the operation timing, specifically, the operation timing of each device is controlled so that the horizontal sealing by the horizontal sealing device is started after a certain period of time after detecting the discharge of the product from the weighing machine. .

Above the fill tube, i.e., in association with the product collection discharge and the fill tube extending from the weigher into the former, a photo-electric sensor of the emitter-receiver type is positioned to detect product falling from the weigher. . In order to arrange the sensor, a window is opened in the product collective discharge part of the weighing machine or the part above the former of the filling cylinder so that the light of the sensor can pass through, or the product collective discharge part of the weighing machine is provided. A gap is provided between the container and the filling cylinder to allow light to pass therethrough. During the operation of the packaging machine, the photoelectric sensor constantly outputs a signal indicating whether or not the sensor light is blocked by the product falling into the filling cylinder through the connection cylinder from the collection discharge section of the weighing machine. sent to the device. Various timing adjustments in the vertical form-fill-seal packaging machine are based on the data provided by each device and control device of the packaging machine, the product biting status due to horizontal sealing, or the bag bottom including the horizontal sealing part of the packaging bag. This is done by adjusting the amount of adjustment based on the visual observation of the falling product and the sound of the falling product.

In the vertical form-fill-seal machine, the product is discharged based on the product drop command received by the weighing machine. The period from the time when the product drop detection signal) is issued to the time when the product drops and fills the packaging bag formed on the tip side of the cylindrical packaging material (that is, the filling timing) ("product drop detection signal"). Time") is not always constant, but fluctuates due to the environment around the packaging machine and the properties and conditions of product items. In other words, depending on the temperature and humidity of the environment, or the surface condition of the product (size, distortedness, hardness, roughness), the time it takes for each product to drop into the packaging bag due to the drop path or collision with other products The resistance received is also slightly different. Therefore, in the vertical form-fill-seal machine, the timing of product discharge and drop from the weighing machine and the operation timing of each device such as the packaging material feeding device and the horizontal sealing device are manually adjusted to match each other with high accuracy. It is the actual situation that we are adjusting the delay.

By the way, when the product item, that is, the product to be packaged is changed to a product different from the previous product, when the packaging material is aluminum vapor-deposited film, it is formed on the tip side of the cylindrical packaging material. Since the inside of the packaging bag cannot be seen through, visual observation through the packaging material or optical sensors cannot determine when the product has fallen or landed in the packaging bag. A sensor that penetrates the aluminum vapor deposition film is sometimes used, but it is unstable to detect when the product has landed in the packaging bag. Therefore, when the packaging material is an aluminum vapor-deposited film, it is particularly difficult to determine the filling timing by detecting the dropping and landing of the product into the packaging bag with a sensor.

Japanese Patent No. 5235459

Therefore, as in the case of a change in the product item, after the discharge completion signal indicating that the product has been discharged from the weighing machine (hereinafter referred to as "product discharge completion signal") is issued, the product is put into the packaging bag. When there is a possibility that the period until the product drops or lands on the packaging bag (product drop time) may change, instead of relying on visual inspection to confirm the timing at which the product drops and lands on the packaging bag, that is, the filling timing, the packaging bag is placed on the tip side. There is a problem to be solved in that it is possible to determine the filling timing of the product by paying attention to the behavior of the cylindrical packaging material in which the is formed and using that behavior.

An object of the present invention is to solve the above problems, and the product drops and lands in the packaging bag after the product discharge completion signal is issued from the weighing machine, just like when the product item is changed. If there is a possibility that the product falling time until the filling timing will change, focus on the behavior of the cylindrical packaging material with the packaging bag formed on the tip side, and determine the product filling timing based on that behavior. To provide a vertical filling and packaging machine capable of simplifying and facilitating complicated timing setting work for operation control of a weighing machine and a packaging machine.

In order to solve the above problems, the vertical filling and packaging machine according to the present invention is a weighing machine that weighs the filling amount of the product per packaging bag and drops the weighed product at a timing based on a drop command. a packaging material feeding device capable of contacting and separating from a tubular packaging material extending in a vertical direction, and performing a feeding operation of feeding the tubular packaging material in a vertical direction while being in contact with the tubular packaging material; and the tubular packaging. The product can be opened and closed with respect to the material, and by laterally sealing the cylindrical packaging material in the closed state, the product is filled in the packaging bag formed ahead of the tip side of the cylindrical packaging material. and a horizontal sealing device for forming the bag package and for forming the succeeding packaging bag, wherein the packaging material feeding device includes a servo motor and a drive of the servo motor while being in contact with the tubular packaging material. When the product is dropped, the feeding belt of the packaging material feeding device is set in contact with the cylindrical packaging material, and the weighing machine In order to measure the product drop time from when the product discharge completion signal is issued when the product is discharged from the weighing machine to when the product falls and lands in the packaging bag, the cylindrical packaging material is dropped from the weighing machine. The filling timing at which the product is filled into the packaging bag is determined based on the behavior of the cylindrical packaging material caused by the product put into the packaging bag colliding with the bottom of the packaging bag, and The behavior of the tubular packaging material caused by the collision of the packaging bag against the bottom is detected as a change in the load acting on the servomotor of the packaging feeding device .

According to this vertical filling and packaging machine, in order to measure the product falling time as in the case where the product item is changed, the weighing machine first weighs the filling amount of the product per packaging bag, The weighed product is dropped into the cylindrical packaging material at the timing (discharge timing) based on the drop command. Products put into the cylindrical packaging material from the weighing machine collide with the bottom of the packaging bag formed on the tip side of the cylindrical packaging material, and the impact at this time acts to lower the packaging bag. . Since the packaging bag is formed on the front end side of the tubular packaging material and suspended from the tubular packaging material, this action appears as a downward movement of the tubular packaging material. Since the filling timing at which the product is filled into the packaging bag is determined based on the behavior of the tubular packaging material, the landing of the product in the packaging bag, i.e., filling, is determined without relying on visual observation or optical sensors. You can specify the timing . The correct filling timing is measured when the product has dropped the actual drop distance in the packaging machine, and the correct product drop time can be obtained.

In this vertical filling and packaging machine, the packaging material feeding device includes a servomotor and a feed belt that is driven to run by the drive of the servomotor while being in contact with the cylindrical packaging material. In some cases, the feeding belt of the packaging material feeding device is set in the contact state with the tubular packaging material, and the behavior of the tubular packaging material resulting from the collision of the product with the packaging bag is It is detected as a change in the load acting on the servomotor of the packaging material feeder.
That is, the downward movement of the tubular packaging material due to the collision of the product is detected as a change in the load of the servomotor of the packaging material feeding device via the feed belt in contact with the tubular packaging material. be. Specifically, changes in the load acting on the servomotor include physical quantities related to the rotation of the servomotor, such as changes in the number of rotations of the rotation shaft of the servomotor, changes in the current that drives the motor, and changes in the current that drives the motor. It appears as fluctuations in torque, and by detecting these, the filling timing can be determined. A packaging material feeding device that includes a servomotor is conventionally installed in a vertical filling and packaging machine. It can detect dropping and landing on the packaging bag.

In order to solve the above problems, the vertical filling and packaging machine according to the present invention is a weighing machine that weighs the filling amount of the product per packaging bag and drops the weighed product at a timing based on a drop command. a packaging material feeding device capable of contacting and separating from a tubular packaging material extending in a vertical direction, and performing a feeding operation of feeding the tubular packaging material in a vertical direction while being in contact with the tubular packaging material; and the tubular packaging. The product can be opened and closed with respect to the material, and by laterally sealing the cylindrical packaging material in the closed state, the product is filled in the packaging bag formed ahead of the tip side of the cylindrical packaging material. and a horizontal sealing device for forming a sealed bag package and for forming the subsequent packaging bag, and for controlling the feeding amount of the tubular packaging material by the packaging material feeding device, the tubular packaging material is An encoder is provided for measuring the amount of movement in the feeding direction, and when the product is dropped, the feeding belt of the packaging material feeding device is set in a separated state away from the tubular packaging material, and In order to measure the product drop time from when the weighing machine issues a product discharge completion signal that the product has been discharged to when the product drops and lands in the packaging bag, the tubular shape is dropped from the weighing machine. The filling timing at which the product is filled into the packaging bag is determined based on the behavior of the cylindrical packaging material caused by the product put into the packaging material colliding with the bottom of the packaging bag, The behavior of the cylindrical packaging material caused by the collision of the product against the bottom of the packaging bag is detected as a change in the amount of movement of the cylindrical packaging material by the encoder .

According to this vertical filling and packaging machine, the downward movement of the tubular packaging material due to the collision of the product is controlled by the servo of the packaging material feeding device via the feed belt in contact with the tubular packaging material. The weigher weighs the amount of product filling per packaging bag to measure the product fall time, such as when the product item is changed, as is the case with vertical fill packaging machines, which detect it as a variation in the motor load. At the same time, the weighed product is dropped into the cylindrical packaging material at the timing (discharge timing) based on the drop command. The product put into the cylindrical packaging material collides with the bottom of the packaging bag formed on the tip side of the cylindrical packaging material, and the impact at this time appears as a behavior that the cylindrical packaging material moves downward. . Since the filling timing at which the product is filled into the packaging bag is determined based on the behavior of the tubular packaging material, the landing of the product in the packaging bag, i.e., filling, is determined without relying on visual observation or optical sensors. You can specify the timing. The correct filling timing is measured when the product has dropped the actual drop distance in the packaging machine, and the correct product drop time can be obtained.
In this case, furthermore, when the product is dropped, the feeding belt of the packaging material feeding device is set in a separated state away from the tubular packaging material . When the feed belt of the packaging material feeder is in contact with the tubular packaging material, the downward movement appearing on the tubular packaging material is consumed to operate the packaging material feeder and the encoder is activated. There is a possibility that the amount of movement of the cylindrical packaging material to be measured may not be large enough. Therefore, when the product is dropped, the feed belt of the packaging material feeding device is set in a separated state away from the tubular packaging material, so that the downward direction appearing on the tubular packaging material due to the collision with the packaging bag of the product is reduced. movement is measured directly by the encoder without being absorbed by the packaging feeder .

In this vertical filling and packaging machine, the vertical filling and packaging machine includes a cylinder making device that bends the belt-shaped packaging material into a substantially cylindrical shape, and the belt-shaped packaging material that has been bent into a substantially cylindrical shape on both side edges. A vertical form-fill-fill-seal machine comprising a vertical sealing device for forming a tubular packaging material by vertical sealing, wherein the packaging material feeding device is configured to suspend the tubular packaging material from the tubular packaging machine. Prior to the dropping of the product, the packaging material can be moved slightly back in the direction opposite to its feeding direction.
A cylinder-making device generally includes a sailor portion and a slit-equipped tubular portion connected to the sailer portion by a ridge line serving as an edge. Since it bends, it becomes a large running resistance. Therefore, if the tubular packaging material suspended from the cylinder making machine is slightly returned in the direction opposite to the feeding direction prior to the dropping of the product, the tubular packaging material is slightly lifted from the cylinder making machine. state. After that, when the tubular packaging material tries to move downward due to the collision of the product with the packaging bag, when the belt-shaped packaging material connected to the tubular packaging material moves through the cylinder making device, Since it moves to eliminate the floating state and does not pass through the ridge line of the cylinder making device, the running resistance of the packaging material does not increase.

In this case, when the product is dropped for measuring the product drop time, such as when the product item is changed, the opening in which the sandwiching of the tubular packaging material by the horizontal sealing device is released. It is preferable that the belt-shaped packaging material is in an open state in which the side edge portion of the strip-shaped packaging material is released from being pinched by the vertical sealing device.
When the product collides with the packaging bag, in order for the impact to directly concentrate only on the packaging bag, the horizontal sealing device should be in an open state and the impact force should not reach the horizontal sealing device. It is preferable that the material is converted into a downward movement without waste. In addition, in order to cause the downward movement that appears in the cylindrical packaging material due to the collision of the product with the packaging bag, in a state where the running resistance of the belt-shaped packaging material and the cylindrical packaging material is small, the vertical sealing device also: It is preferable that the side edge portions of the belt-shaped packaging material are released from being pinched in the open state.

In this vertical filling and packaging machine, the behavior of the cylindrical packaging material caused by the collision of the product caused by the product being thrown into the cylindrical packaging material suspended from the cylinder making machine is the behavior of the bag. A vibration sensor is placed in contact with the lower part of the bag and can detect vibrations when the product reaches the lower part of the bag, and the sound inside or around the bag is monitored to change the sound when the product falls. can be detected by a sound sensor capable of detecting , or an image sensor capable of detecting a change in the image such as swelling of the packaging bag when the product falls.
In this vertical filling and packaging machine, a separate sensor is required to detect images such as vibration, sound, and swelling of the tubular packaging material (packaging bag). can be seen as a change in

In this vertical filling and packaging machine, a product discharge completion signal indicating that the product has been discharged from the weighing machine at least based on the timing of the horizontal sealing of the cylindrical packaging material by the horizontal sealing device. The timing of the drop command of the product to the weighing machine can be adjusted based on back calculation of the product drop time from the timing when the is issued to the measured filling timing.
When the filling timing is measured, the operation timing of the packaging material feeding device, the vertical sealing device, the horizontal sealing device, etc. is set, and the product discharge completion signal is output at least for the operation timing of the horizontal sealing device. It is preferable to adjust and set the timing for issuing a product drop command to the weighing machine by counting back the product drop period from the timing of filling to the time of the filling timing. By doing so, the product can be accommodated and packaged at the correct timing without failing in the subsequent dropping and packaging of the product in the packaging bag.

Further, in this vertical filling and packaging machine, as a method of setting the timing, contrary to the above, the product drop time is set based on the product discharge completion signal indicating that the product has been discharged from the weighing machine. Based on the addition, it is possible to adjust at least the operation timing for applying the horizontal seal to the cylindrical packaging material by the horizontal sealing device, and further to adjust and set the operation timing of each of the other devices.

In this vertical filling and packaging machine, data related to the product drop time from the drop of the product from the weighing machine to the drop and landing on the packaging bag, and the operation timing of at least the packaging material feeding device and the horizontal sealing device. and as a chart.
The operator can check the time on the display device by displaying the data on the product falling time and the operation timing of at least the packaging material feeding device and the horizontal sealing device provided in the vertical filling and packaging machine in a chart form. However, it is possible to set the timing for the weighing machine to drop the product and the timing for instructing the weighing machine to drop the product at the timing that matches the operation timing of each device that constitutes the packaging machine.

Since the vertical filling and packaging machine according to the present invention is configured as described above, the vertical filling and packaging machine includes a packaging material feeding device capable of contacting and separating from the cylindrical packaging material extending in the vertical direction. A horizontal sealing device that is capable of opening and closing the cylindrical packaging material that is conveyed in the vertical direction while being in contact with the cylindrical packaging material is in a closed state. Forming a bag package in which the dropped product is filled in a packaging bag formed prior to the tip side of the tubular packaging material by laterally sealing the tubular packaging material when it is in the A subsequent packaging bag is formed in the tubular packaging material.
The weighing machine, which measures the amount of product filling per packaging bag, discharges the weighed product based on the received drop command. When it collides with the bottom, the cylindrical packaging material behaves due to the collision of the product, and based on the behavior, it is possible to determine the filling timing at which the product is filled into the packaging bag.
The packaging material feeding device includes a servomotor and a feed belt that is driven to run by the drive of the servomotor, and the feeding belt of the packaging material feeding device is set in contact with the tubular packaging material when the product drops. In this case, the downward movement of the tubular packaging caused by the impact of the product on the bottom of the packaging bag is controlled by the servo of the packaging feeder via the feed belt in contact with the tubular packaging. It is detected as a change in the motor load. In addition, in order to control the feeding amount of the cylindrical packaging material by the packaging material feeding device, an encoder is provided to (directly) measure the amount of movement of the cylindrical packaging material in the feeding direction. When the feed belt of the feeding device is set in a spaced state away from the tubular packaging material, the downward movement of the tubular packaging material caused by the impact of the product on the bottom of the packaging bag is measured by the encoder. It is detected as a change in the amount of movement of the cylindrical packaging material.
Therefore, according to this vertical filling and packaging machine, for example, when the product item is changed, the product is dropped into the packaging bag after the product discharge completion signal is issued from the weighing machine.・When it is necessary to measure the product drop time until it lands, it is necessary to rely on uncertain measurements such as visual observation, and the complexity and cost of the structure such as installing an optical sensor to detect the drop of the product separately. The filling timing at which the product actually falls and lands in the packaging bag can be reliably and accurately detected with a simple structural configuration without causing an increase in . The time elapsed from when the weighing machine issues a product discharge completion signal to when the product drops and lands on the packaging bag is known as the product drop time. The timing of the product discharge completion signal and the operation timing of various devices that constitute the packaging machine can be adjusted and set to match each other with high accuracy based on the product falling time.

FIG. 1 is a block diagram showing an example of a control device provided in a vertical filling and packaging machine according to the present invention. FIG. 2 is a schematic diagram showing an example of the structure of the vertical filling and packaging machine according to the present invention. FIG. 3 is a flow chart showing the control contents of an embodiment of the vertical filling and packaging machine according to the present invention. FIG. 4 is a flow chart showing the control contents of another embodiment of the vertical filling and packaging machine according to the present invention. FIG. 5 is a diagram showing a mode in which the filling timing can be detected more easily in the vertical filling and packaging machine according to the present invention. FIG. 6 is a diagram showing an example of a display image of a display device for assisting measurement of product drop time in the vertical filling and packaging machine according to the present invention. FIG. 7 is a diagram showing an example of a display screen displaying the proper product drop times obtained by the vertical filling and packaging machine according to the present invention, side by side with the operation chart of the packaging machine. FIG. 8 is a diagram showing an example of a display screen displaying the product drop time obtained by the vertical filling and packaging machine according to the present invention, but not proper, side by side with the operation chart of the packaging machine. FIG. 9 is a perspective view showing an example of a conventional vertical filling and packaging machine. FIG. 10 is a perspective view showing an example of a conventional vertical filling and packaging machine including peripheral devices such as a weighing machine.

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a vertical filling and packaging machine according to the present invention will be described below with reference to the attached drawings. FIG. 1 is a block diagram showing an example of a control device provided in a vertical filling and packaging machine according to the present invention, and FIG. 2 is a schematic diagram showing an example of the structure of the vertical filling and packaging machine according to the present invention.

Before explaining the embodiment of the vertical form filling packaging machine according to the present invention, a conventionally known vertical form filling packaging machine, one example of which is schematically shown in a perspective view in FIG. 9, will be explained. In the vertical bag-making and filling machine 50, the band-shaped packaging material Fw is bent into a substantially cylindrical shape by a former 51, which is a cylinder-making device, and traveled in the vertical direction (the feeding direction of the packaging material) while the vertical sealing device is applied. A vertical seal (vertical seal portion Sc) is applied by 52 to form a cylindrical packaging material Ft. Products S, which are packages, are introduced and filled through a filling cylinder (filling cylinder) 53 into the cylindrical packaging material Ft. The lateral sealing device 54 laterally seals the tubular packaging material Ft (in a direction intersecting the feeding direction of the packaging material), so that the front end side of the tubular packaging material Ft is formed in advance. At the same time that the bag package Bp in which the product S is accommodated and packaged in the packaging bag B is manufactured, the packaging bag B into which the product S is put next is formed. A pair of belt-type packaging material feeding devices 55a and 55b (generically referred to as 55) for sandwiching and feeding the tubular packaging material Ft are arranged on both left and right sides of the outer circumference of the filling cylinder 53. As shown in FIG. By repeating the formation of the cylindrical packaging material Ft by vertical sealing, the filling of the product S, the formation of the packaging bag B, and the sealing of the packaging bag B by horizontal sealing, the bag packages Bp are continuously manufactured.

The band-shaped packaging material Fw is bent by the former 51 so that both side edge portions fe, fe are overlapped in a palm-to-palm shape, and the bar-shaped vertical seal blocks 52a, 52b of the vertical sealing device 52 overlap both side edge portions fe, fe. The cylindrical packaging material Ft is formed by sandwiching the fe and applying the vertical seal portion Sc. The bar-shaped horizontal seal blocks 54a and 54b that constitute the horizontal sealing device 54 are members that move toward and away from the tubular packaging material Ft. An upper horizontal sealer portion that forms a bottom side horizontal seal portion (part of the horizontal seal portion Se) for the packaging bag B, and a top side horizontal seal portion of the bag package Bp (horizontal seal portion and a lower lateral sealer portion forming the rest of Se). A bag packaging body Bp is manufactured by laterally sealing the packaging bag B in which the product S is introduced through the cylindrical packaging material Ft by the lateral sealing device 54 in the transverse direction.

The horizontal sealing device 54 can incorporate a cutter device 56 for cutting the tubular packaging material Ft (in that case, the horizontal sealing device is also called a horizontal sealing/cutting device). The cutter device 56 has a cutter blade 56a attached between the upper and lower horizontal sealer portions in one horizontal seal block 54a, and the horizontal seal blocks 54a and 54b are mutually attached to the other horizontal seal block 54b. A groove 56b into which the cutter blade 56a enters when approaching is formed. Both lateral seal blocks 54a and 54b approach each other to sandwich and weld the cylindrical packaging material to form lateral seal portions Se and Se, and at the same time, the cutter blade 56a cuts the cylindrical packaging material Ft between the lateral seal portions Se and Se. break through and cut. At the lower end of the filling cylinder 53, a pair of tension guides 59, 59 for tensioning the cylindrical packaging material 61 diametrically outward are provided so as to extend obliquely downward.

In this type of vertical form-fill-seal packaging machine, the packaging material is fed continuously or intermittently in accordance with the packaging operation. That is, while the belt-shaped packaging material Fw and the curved packaging material with its both side edge portions fe, fe approaching each other are continuously fed, or while the intermittent feeding is stopped, the vertical sealing is performed. A device 52 sandwiches both side edge portions fe, fe to form a vertical seal portion Sc in the portion, and a horizontal sealing device 54 forms a horizontal seal portion Se. The vertical and horizontal sealing portions Sc and Se are heat-sealed by pressurizing and heating the packaging material to weld the sealing agent. A packaging machine of the type that continuously feeds packaging materials needs to be provided with a mechanism (a well-known mechanism, not shown here) for making the vertical sealing device 52 and the horizontal sealing device 54 operate, for example, in a box motion. It has a complex structure, but is suitable for high-speed packaging. In addition, the packaging machine of the intermittent feeding type has a limitation in packaging speed because it is necessary to temporarily stop the feeding of the packaging material when performing heat sealing, but the structure of the vertical and horizontal sealing devices 52 and 54 is simple. and stable and reliable operation, there is a strong demand.

The structure of the packaging machine itself in the embodiment of the vertical filling and packaging machine according to the present invention may be the same as the vertical bag making, filling and packaging machine 50 shown in FIG. 9 and described based thereon. That is, the vertical form-fill-seal packaging machine 50 includes, for example, a product S supply/input device (weighing machine 60. It is a well-known device and is omitted in FIG. 9. See FIG. 10 and its description), a cylinder from a belt-shaped packaging material A vertical sealing device 52 for forming the shaped packaging material, a packaging material feeding device (paper feeding device) 55 for feeding the belt-shaped packaging material or cylindrical packaging material in the vertical direction of the packaging machine, and a horizontal sealing portion on the cylindrical packaging material in the transverse direction. A horizontal sealing device 54 for applying the sealing, a cutter device 56 for cutting the tubular packaging material at the horizontal sealing portion to separate the bag package from the tubular packaging material, and the like are provided. The packaging operation of the vertical form-fill-seal packaging machine 50 is an integration of the operations performed by these various devices constituting the vertical form-fill-seal packaging machine 50 .

Vertical form-fill-seal packaging machine 50, as shown in FIG. 63, transport conveyor 64, and boxing device 65) in combination with the production line. The weighing machine 60 has a plurality of weighing units 61 (details are omitted, only some of which are denoted by reference numerals) consisting of pool hoppers with weighing sensors, weighing hoppers, memory hoppers, etc., arranged three-dimensionally around a distributed table. It is a combination weighing machine that is arranged in an orderly fashion. Below the weighing unit 61, a collecting hopper is provided as a collecting discharge section for collecting the products S dropped as a combination from several weighing units 61. The products S discharged and dropped from the collecting hopper are vertical. It is put into the bag making, filling and packaging machine 50 . Products are discharged from the collecting hopper of the weighing machine 60 based on a drop command issued from the control device to the weighing machine 60 . The belt-shaped packaging material Fw is unwound from the film roll Fr and supplied to the vertical form-fill-seal packaging machine 50 .

The block diagram shown in FIG. 1 shows the basic relationship between each device constituting the vertical filling and packaging machine 10 and the control device 20 . Various setting items such as bag length and packing speed required for the packaging operation are input to the calculating section 21 of the control device 20 by the setting section 19 , and the necessary items are stored in the memory 22 . The control device 20 includes a product supply control section 23, a packaging material feed control section 24, a vertical sealing control section 25, a horizontal sealing control section 26, and a cutter control section 27, to which commands are output from the computing section 21, respectively.

The product supply control unit 23 outputs a control signal to a product supply device (a weighing machine in a broad sense) including the weighing machine 60 to control the timing and amount of supply of the product S into the packaging machine. The packaging material feed control unit 24 outputs a control signal to a packaging material feeding device 55 using, for example, an endless timing belt having a suction function, and causes the packaging material feeding device 55 to feed the packaging material (cylindrical packaging material Ft). to control the timing and amount of feeding. The vertical sealing control unit 25 outputs a control signal to the vertical sealing device 52 that forms the tubular packaging material Ft by pasting together the side edge portions fe, fe of the band-shaped packaging material Fw, and controls the operation timing of the vertical sealing device 52, etc. to control. The horizontal sealing control unit 26 outputs a control signal to the horizontal sealing device 54 that seals the tubular packaging material Ft in the horizontal direction to form the horizontal sealing portion Se, and controls the operation timing of the horizontal sealing device 54 and the like. The cutter control unit 27 outputs a control signal to, for example, a cutter device 56 (including a driving device therefor) incorporated in the horizontal sealing device 54 to cut the packaging material to cut the bag package Bp into a cylindrical packaging material. It controls the operating timing and the like of the cutter device 56 that separates and cuts from Ft.

In order to match the operation timings of the weighing machine 60 and the vertical form-fill-seal packaging machine 50, timing signals (ON/OFF signals) are exchanged between the controllers of the controller 20 that controls both devices. There are several methods for exchanging timing signals. In the block diagram shown in FIG. 1, a packaging machine master/weighing machine subordinate system sends a product request signal (dropping command signal) 70 from a vertical bag-making, filling, and packaging machine 50 to a weighing machine 60. The machine 60 weighs the products S and, at the same time as discharging the products S for which the weighing has been completed, sends a product discharge completion signal 71 to the packaging machine side. Upon receiving the product discharge completion signal 71, the vertical form-fill-seal packaging machine 50 sends an operation control signal to each of the controllers 24-27 to carry out the subsequent form-filling operation. By the bag-making and filling operation, a series of operations from vertical sealing to product filling, horizontal sealing, and cutting to manufacture the bag package Bp are executed.

When the dropped product S is thrown into the filling cylinder 53 or the cylindrical packaging material Ft and collides with the bottom of the packaging bag B formed on the front end side of the cylindrical packaging material Ft, the impact causes the cylindrical packaging. The material Ft and the belt-shaped packaging material Fw connected thereto move slightly in the feeding direction. By monitoring the feeding of the packaging material and detecting the feeding of the packaging material even if it is a slight amount of movement, the time is grasped as the filling timing when the product S drops and lands on the packaging bag B. be able to.

FIG. 2 is a diagram showing an example of the structure (device configuration) of the vertical filling and packaging machine according to the present invention. As shown in FIG. 2, the basic configuration of the vertical filling and packaging machine 10 is the same as that of the vertical bag making, filling and packaging machine 50 shown in FIG. By assigning the same reference numerals as those used in the mold-fill-sealing machine 50, detailed description will be omitted. In FIG. 2, the packaging material feeding device 55 for feeding the tubular packaging material Ft in the vertical direction is arranged so as to sandwich (or suck) the tubular packaging material Ft on both lateral outer surfaces of the filling tube 53. It is equipped with packaging material feed belts 11, 11 (only one of which is shown in the drawing) consisting of endless timing belts, and a packaging material feed servomotor 14 for synchronously driving both packaging material feed belts 11, 11. FIG. Each packaging material feed belt 11 is wound around driving-side and driven-side timing pulleys 12 and 13 arranged respectively above and below, and the driving-side timing pulley 12 arranged below It is rotationally driven by the feed servomotor 14 .

In the vertical filling and packaging machine 10, a length measuring encoder 15 for measuring the length of the packaging material to be fed is arranged above the arrangement position of the packaging material feeding belt 11 (below the former). The length measuring encoder 15 is used to control the feeding of the packaging material. For example, if the length measuring encoder 15 is of an optical incremental type, a slit disk having a window on the outer periphery and a photoelectric detection device can be used. can be adopted. A signal is generated depending on whether the light passing through the window is turned on or off by rotating the slit disk in contact with the packaging material as the packaging material travels. By counting the number of pulses of the signal, the feeding length of the packaging material can be detected with high precision and high resolution without contact.

FIG. 3 is a flow chart showing the contents of control in one embodiment of the vertical filling and packaging machine according to the invention, and FIG. 4 is a flow chart showing the contents of control in another embodiment of the vertical filling and packaging machine according to the invention.
The embodiment of the vertical filling and packaging machine of the present invention shown in FIG. This is a vertical filling and packaging machine that detects filling timing. In the filling timing measurement operation flow, when the product item to be packaged is changed, for example, the setting unit 19 of the control device 20 is provided with a product item change button or a timing initial setting button, By pressing or touching the button (step 1; abbreviated as "S1"; hereinafter the same), the operation of measuring the filling timing of the product S into the packaging bag B is started. It is assumed that the product S has already been collected in the collecting/discharging section of the weighing machine 60 and is ready for discharge.

First, as a preparation stage for measuring the filling timing of the packaging bag B when changing the product item, the vertical sealing device 52 of the vertical filling and packaging machine 10 is opened (if it is already open, it is kept open). ). That is, the vertical sealing blocks 52a, 52b of the vertical sealing device 52 occupy the retracted position without sandwiching the side edge portions ft, ft of the band-shaped packaging material Fw (S2). Similarly, the lateral sealing device 54 is opened (if it is already open, it is maintained). That is, the horizontal seal blocks 54a and 54b occupy a non-contact retracted position away from the tubular packaging material Ft (S3). Not only the vertical sealing device 52 but also the horizontal sealing device 54 is opened after forming the packaging bag by sealing, so that even if the falling product collides with the bottom part of the packaging bag, the impact is transferred to the horizontal sealing device. It is possible to directly convert the behavior of the cylindrical packaging material into the behavior of the cylindrical packaging material without wasting it, and it is possible to avoid affecting the measurement of the filling timing. In addition, in the packaging material feeding device 55, the belt feeding function of the packaging material is turned on (S4). That is, the packaging material feed belts 11, 11 occupy a position close to the tubular packaging material Ft, and the paper feeding of the tubular packaging material Ft and the running of the packaging material feed belts 11, 11 are associated with each other. There is .

When the preparation for the above measurement is completed, the control device 20 issues a drop command signal for dropping the product S to the weighing machine 60 (S5). The weighing machine 60 discharges the products S collected and stored in the collecting and discharging portion of the weighing machine 60 based on the drop command signal, and outputs a product discharge completion signal from the weighing machine 60 (S6). The product discharge completion signal can be an operation signal of the collective discharge section, but it may also be a signal from which a sensor provided directly below the collective discharge section of the weighing machine 60 detects the fall of the product S. . The product S dropped from the weighing machine 60 is put into the filling tube 53 and drops and lands on the bottom of the packaging bag B formed on the tip side of the tubular packaging material Ft. Due to the impact of the product S on the packaging bag B when the product S lands on the bottom of the packaging bag B, the tubular packaging material Ft suspended by the former 51 moves in the feeding direction, That is, the impact causes the cylindrical packaging material Ft to move downward.

Since the packaging material feed belts 11, 11 are in contact with the tubular packaging material Ft, such behavior of the tubular packaging material Ft appears as a state change such as a load on the packaging material feeding servomotor 14. FIG. That is, the rotation output shaft of the packaging material feed servomotor 14 is slightly rotated, and the motor drive current and motor torque are also affected by the reaction to the rotation. By monitoring the behavior of the servomotor 14, it is possible to detect and specify the filling timing as the time when the fluctuation appears (S7). Furthermore, by calculating the time difference between the timing at which the product discharge completion signal is issued in S6 and the filling timing, the time from the completion of discharge of the product S to the weighing machine 60 to the actual drop/landing of the product S in the packaging bag B can be calculated. The product drop time is automatically calculated.

Another embodiment of the vertical filling and packaging machine of the present invention shown in FIG. This is a vertical filling and packaging machine. The difference from the embodiment shown in FIG. 3 is the step of turning off the belt feeding function of the packaging material in the packaging material feeding device 55 (S14), and the monitoring of the state change of the length measuring encoder 15, i.e., the measuring of the length. This is a step (S17) of detecting the filling timing of the product S based on the movement of the packaging material being detected by monitoring the output of the encoder 15. FIG. There is no change in the contents of the other steps, and S1 to S3, S5, and S6 shown in FIG. 3 correspond to S11 to S13, S15, and S16 in FIG. 4, respectively. .

Since the packaging material feeding device 55 is in contact with the tubular packaging material Ft, the packaging material feeding device 55 acts as a resistance to the movement of the tubular packaging material Ft, and the detection of the behavior of the packaging material by the length measurement encoder 15 is affected. Get out. Therefore, in S14, the belt feeding function of the packaging material by the packaging material feeding device 55 is turned off, and the packaging material feeding belts 11, 11 take a position away from the tubular packaging material Ft. In S17, when the product S collides with the bottom of the packaging bag B and a shock is generated, the cylindrical packaging material Ft is pushed downward, and although the output of the length measuring encoder 15 is slight, the packaging material moves in the paper feeding direction. Fluctuations occur in measurements supposedly sent to By detecting the time when the change occurs, the timing at which the product S falls and lands in the packaging bag B can be automatically known.

With respect to the weighing machine 60, if the product drop time from the timing at which the product discharge completion signal is issued to the timing at which the product drops and lands on the packaging bag B formed on the front end side of the tubular packaging material Ft is obtained, the packaging machine is operated. By calculating back from the operation timing of the packaging machine so as to match the timing, the timing at which the product discharge completion signal to the weighing machine 60 should be issued is determined, and the product S dropping command to the weighing machine 60 is issued according to the timing. A signal is issued (determination of the timing of the packaging machine master and the weighing machine slave). Alternatively, the operation timing of the packaging machine can be determined based on the time obtained by adding the product drop time to the timing at which the product discharge completion signal is output to the weighing machine 60 (weighing machine main/packaging machine subordinate). timing decisions). Therefore, the operation timing for dropping and landing the product S in the packaging bag B formed on the front end side of the tubular packaging material Ft and the timing for the vertical sealing device 52, the horizontal sealing device 54, the cutter (knife) device 56, etc. can be associated with the operation timing of the form-fill-sealing machine to which is set so as not to cause defective packaging of the product, and in particular, it is possible to prevent the product S from being caught by the lateral sealing device 54 . Also, by minimizing wasted time, it is possible to adapt to high-speed packaging.

FIG. 5 shows a mode in which the packaging material feed servomotor 14 and the length measuring encoder 15 make it easier to detect the filling timing. The cylinder forming device (former 51) bends the passing band-shaped packaging material Fw into a substantially cylindrical shape. It is deformed so as to be bent at the ridge line E while being in sliding contact with E. Therefore, running resistance is generated when the strip-shaped packaging material Fw passes through the former 51 . Even if the cylindrical packaging material Ft is slightly fed in the feeding direction due to the impact of the product S dropping, the portion of the former 51 that passes through the ridgeline E is bent and deformed as it passes through. , which is disadvantageous for detecting the behavior of the cylindrical packaging material Ft. Therefore, when measuring the filling timing, the packaging material feeding device 55 is slightly driven in the reverse direction before the product S is dropped, and the belt-shaped packaging material Fw or the cylindrical packaging material Ft is slightly reversed in advance. It is preferable to return to FIG. 5 shows the returned packaging material being bent from the former 51 and lifted by the packaging material lifting amount ΔH. By doing so, when the product S collides with the packaging bag B and the packaging material is pushed down by the impact, the packaging material does not pass the edge line E and can easily move in the opposite direction by the amount returned. This makes it easier for the packaging material feeding servomotor 14 and the length measuring encoder 15 to detect the behavior of the packaging material.

From the viewpoint of the behavior of the packaging material, vibration or sound generated by the packaging material may be detected. Therefore, a vibration sensor is placed in contact with the lower part of the packaging bag and can detect vibrations when the product reaches the lower part of the bag. A sound sensor that can detect changes in the sound when the product is dropped, or an image sensor that monitors the lower part of the bag with an image and can detect changes in the image such as the swelling of the packaging bag when the product is dropped. By detecting the phenomenon, it is possible to automatically detect the filling timing of the product.

FIG. 6 is a diagram showing an example of a display image of a display device for assisting measurement of product drop time in the vertical filling and packaging machine according to the present invention. The display device 28 is a display device such as a liquid crystal monitor provided in the vertical filling and packaging machine 10 to serve as an interface with the operator in relation to the control device 20. , that is, the operating state of each device including the weighing machine 60 of the vertical filling and packaging machine 10 can be displayed in real time, the items stored in the memory 22 can be displayed, or the vertical filling and packaging machine 10 input for setting the operation of each device as desired. By looking at the display screen of the display device 28, the operator can set the operation items of the vertical filling and packaging machine 10 and grasp the operating state.

FIG. 6(a) is an example of a display screen when measuring the product drop time using the signal from the weighing machine 60. FIG. When the weighing machine 60 receives the product request signal 70 (the time is displayed as t0) output from the control device 20 and completes the discharge of the products S from the product collective discharge section, the weighing machine 60 outputs the product discharge completion signal 71. is output (signal transmission time t1 is displayed). The ejected product S falls and lands on the packaging bag B formed on the tip side of the tubular packaging material Ft, and the product S lands on the packaging bag B based on the behavior of the tubular packaging material Ft. is detected (detection time t2 is displayed). The time interval from the output time of the product ejection completion signal 71 to the detection of the product landing (filling timing) is displayed as the product falling time ΔT. The operator who grasps the product falling time ΔT can set the necessary operation timing of the weighing machine 60 corresponding to the operation of the vertical filling and packaging machine 10 .

FIG. 6B is an example of a display screen when measuring product drop time using product drop detection by an optical sensor. The optical sensor is a sensor provided at the top of the filling tube 53 that protrudes upward through the product collective discharge section at the bottom of the weighing machine 60 and the former 51 and is connected to the product collective discharge section. , the fall of the product is detected by blocking the light from the product falling into the vertical filling and packaging machine. A product drop detection signal is output from the optical sensor (signal transmission time t10 is displayed). The ejected product S falls and lands on the packaging bag B formed on the tip side of the tubular packaging material Ft, and the product S lands on the packaging bag B based on the behavior of the tubular packaging material Ft. is detected (detection time t11 is displayed). The time interval from the output time of the product ejection completion signal 71 to the detection of the product landing (filling timing) is displayed as the product falling time ΔT. The operator who grasps the product falling time ΔT can set the necessary operation timing of the weighing machine 60 corresponding to the operation of the vertical filling and packaging machine 10 .
The operator can easily grasp the product falling time ΔT with the assistance of the display on the display device 28, and furthermore, based on the product falling time ΔT, the operation of each device of the vertical filling and packaging machine 10 can be controlled. The operation timing of the matching weighing machine 60 can be set.

FIG. 7 is a diagram showing an example of a display screen displaying the proper product drop times obtained by the vertical filling and packaging machine according to the present invention, side by side with the operation chart of the packaging machine. The display screen shown in FIG. 7(a) is an operation chart of each device for the normal packaging operation of the vertical filling and packaging machine in which the horizontal sealing device starts the closing operation when the feeding of the packaging material (film) is about to end. is shown. When the closing operation of the lateral sealing device is completed, a period of lateral sealing (lateral sealing section) starts, and the lateral sealing section continues until the opening operation is started. A product request signal 70 is issued to the weighing machine, and in response to the product request signal 70, the weighing machine issues a product discharge completion signal 71 to discharge the product. Based on the measured filling timing, the product falling time ΔT after the product discharge completion signal 71 is issued and the filling timing are displayed on the display screen. In normal packaging operation, the product is dropped and filled into the packaging bag during the horizontal sealing section where the horizontal sealing device is closed. There is no problem with the product discharge timing and the packaging operation timing of the packaging machine.

The display screen shown in FIG. 7(b) shows the operation chart of each device for the normal packaging operation of the vertical filling and packaging machine in which the closing operation of the horizontal sealing device is completed at the same time as the feeding of the packaging material (film) is completed. showing. In this example as well, in normal packaging operation, the product is dropped and filled into the packaging bag during the horizontal sealing section in which the horizontal sealing device is closed, so the product is not caught in the horizontal sealing device. There is no problem with the timing of product discharge from the weighing machine and the timing of the packaging operation of the packaging machine. By displaying the current timings on the display device in this way, the operator can check the timings while looking at the display device.

FIG. 8 is a diagram showing an example of a display screen displaying the product drop time obtained by the vertical filling and packaging machine according to the present invention, but not proper, side by side with the operation chart of the packaging machine. Assuming that there is a product request signal 70 indicated by the solid line in FIG. 8(a), after the product ejection completion signal (solid line) 71 is output, the product drops and fills the packaging bag after the product drop time ΔT has elapsed. The filling timing (solid line) is the timing before the horizontal sealing device is completely closed, and there is a risk that the horizontal sealing device will bite the product. Therefore, the display device indicates that it is possible to delay the operation of the weighing machine without changing the operation of the packaging machine. That is, by delaying the product request signal 70, it is indicated that the filling timing is after the lateral sealing device is completely closed, and as a result, it is possible to avoid product biting.

In the example shown in FIG. 8(b), when there is a product request signal 70 indicated by a solid line, after the product ejection completion signal (solid line) 71 is output, the product falls into the packaging bag after the product drop time ΔT has passed. The filling timing (solid line) for dropping and filling is the timing before the horizontal sealing device is completely closed, and the horizontal sealing device may bite the product, which is the same as in FIG. 8(a). Therefore, the display device indicates that the problem can be dealt with by advancing the operation of the packaging machine without changing the operation of the weighing machine. That is, by moving forward the packaging material feeding, vertical sealing, and horizontal sealing operations of the packaging machine, the filling timing is set after the horizontal sealing device is completely closed, thereby avoiding product biting. It turns out that it is possible. In this way, by displaying the current timing and the corrected timing on the display device, the operator can adjust and set each timing while checking the display device, which helps the adjustment and setting work. error can be eliminated.

REFERENCE SIGNS LIST 10 vertical filling and packaging machine 11 , 11 packaging material feed belt 12 , 13 driving side and driven side timing pulley 14 packaging material feeding servomotor 15 length measuring encoder 19 setting section 20 control device 21 calculation section 22 memory 23 product supply control section 24 Packaging material feeding control unit 25 Vertical sealing control unit 26 Horizontal sealing control unit 27 Cutter control unit 28 Display device 50 Vertical bag making, filling and packaging machine 51 Former 52 Vertical sealing device 52a, 52b Vertical sealing block 53 Filling tube 54 Horizontal sealing device 54a , 54b Horizontal seal blocks 55, 55a, 55b Packaging material feeding device (paper feeding device)
56 Cutter device 56a Cutter blade 56b Grooves 59, 59 Tension guide 60 Weighing machine 61 Hopper 62 Product supply conveyor for weighing machine 63 Weight inspection device 64 Transfer conveyor 65 Cartoning device 70 Product request signal (drop command signal) 71 Product discharge completion signal Fr Film roll Ft Cylindrical packaging material Fw Band-shaped packaging material fe, fe Both side edge portions Sc Vertical seal portion Se Horizontal seal portion S Product E Edge line B Bag Bp Bag packaging body ΔH Lifting amount of packaging material ΔT Product drop time

Claims (7)

A weighing machine that weighs the filling amount of the product per packaging bag and drops the weighed product at a timing based on a drop command;
A packaging material feeding device capable of moving toward and away from a cylindrical packaging material extending in a vertical direction, and performing a feeding operation to feed the cylindrical packaging material in the vertical direction while being in contact with the cylindrical packaging material, and the cylinder. The product can be opened and closed with respect to the cylindrical packaging material, and by applying a lateral seal to the cylindrical packaging material in the closed state, the product is placed in the packaging bag formed prior to the tip side of the cylindrical packaging material. is provided with a lateral sealing device for forming a bag package filled with and forming the subsequent packaging bag,
The packaging material feeding device includes a servomotor and a feed belt that is driven to run by the drive of the servomotor while being in contact with the tubular packaging material,
When the product is dropped, the feeding belt of the packaging material feeding device is set in contact with the tubular packaging material,
In order to measure the product drop time from when the weighing machine issues a product discharge completion signal indicating that the product has been discharged to when the product drops and lands in the packaging bag, The filling timing at which the product is filled into the packaging bag is determined based on the behavior of the cylindrical packaging material caused by the collision of the product put into the packaging bag with the bottom of the packaging bag . ,
A vertical filling and packaging machine , wherein the behavior of the cylindrical packaging material caused by the collision of the product against the bottom of the packaging bag is detected as a change in the load acting on the servomotor of the packaging material feeding device. . A weighing machine that weighs the filling amount of the product per packaging bag and drops the weighed product at a timing based on a drop command;
A packaging material feeding device capable of contacting and separating from a cylindrical packaging material extending in the vertical direction, and performing a feeding operation of feeding the cylindrical packaging material in the vertical direction while being in contact with the cylindrical packaging material;
The packaging bag is openable and closable with respect to the tubular packaging material, and is formed prior to the leading end side of the tubular packaging material by laterally sealing the tubular packaging material in the closed state. a horizontal sealing device for forming a bag package filled with the product and forming the subsequent packaging bag;
In order to control the feeding amount of the tubular packaging material by the packaging material feeding device, an encoder is provided for measuring the amount of movement of the tubular packaging material in the feeding direction,
When the product is dropped, the feeding belt of the packaging material feeding device is set in a separated state away from the tubular packaging material,
In order to measure the product drop time from when the weighing machine issues a product discharge completion signal indicating that the product has been discharged to when the product drops and lands in the packaging bag, The filling timing at which the product is filled into the packaging bag is determined based on the behavior of the cylindrical packaging material caused by the collision of the product put into the packaging bag with the bottom of the packaging bag. ,
A vertical filling and packaging machine, wherein the behavior of the cylindrical packaging material caused by the collision of the product against the bottom of the packaging bag is detected by the encoder as a change in the amount of movement of the cylindrical packaging material. The vertical filling and packaging machine includes a cylinder making device that bends a belt-shaped packaging material into a substantially cylindrical shape, and a cylinder-shaped packaging material that is bent into a substantially cylindrical shape by applying vertical seals to both side edges of the belt-shaped packaging material. A vertical form-fill-seal machine equipped with a vertical sealing device for forming packaging materials,
The packaging material feeding device slightly returns the tubular packaging material suspended from the cylinder making device in a direction opposite to the feeding direction before the product is dropped;
The vertical filling and packaging machine according to claim 1 or 2 , comprising: When the product is dropped, it is in an open state in which the pinching of the cylindrical packaging material by the horizontal sealing device is released, and the pinching of the side edge portion of the belt-shaped packaging material by the vertical sealing device is released. 4. The vertical filling and packaging machine according to claim 3 , comprising: It is measured from the timing at which the weighing machine issues a product discharge completion signal indicating that the product has been discharged, based on the horizontal sealing operation timing for laterally sealing the cylindrical packaging material by the horizontal sealing device. The vertical filling according to any one of claims 1 to 4 , comprising adjusting the timing of the drop command of the product to the weighing machine based on backward calculation of the period until the filling timing. packing machine. Based on the product discharge completion signal indicating that the product has been discharged from the weighing machine as a reference, the product falling time is added, and the horizontal sealing is performed on the cylindrical packaging material by the horizontal sealing device. 5. The vertical filling and packaging machine according to any one of claims 1 to 4 , wherein the operation timing of applying is adjusted. A display that displays, in the form of a chart, data relating to the product drop time from when the product is dropped from the weighing machine to when the product drops and lands on the packaging bag, and at least the operation timings of the packaging material feeding device and the horizontal sealing device. The vertical filling and packaging machine according to any one of claims 1 to 6 , comprising a device.

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