JP6720482B2 - Sealing device for packaging bag, sealing inspection method for packaging bag, and manufacturing method for packaging product - Google Patents

Description

The present invention relates to a packaging bag sealing device, a packaging bag sealing inspection method, and a packaging product manufacturing method.

When manufacturing a packaged product in which a packaging bag is filled with contents, an automatic filling and packaging machine that continuously fills the packaging bag with the contents and seals the packaging bag may be used. In such an automatic filling and packaging machine, for example, the contents are filled into the packaging bag through the opening of the packaging bag with one end opened, and then the opening of the packaging bag is heat-welded and sealed by heating or the like. It

In this type of automatic filling and packaging machine, if the content is filled in a large amount during filling or the content is not smoothly supplied to the packaging bag, the content may adhere to the opening of the packaging bag. When the packaging bag is sealed in this state, the hermetically sealed state becomes insufficient, resulting in poor sealing.

Occurrence of poor sealing may cause the contents to be released from the packaging bag or cause the contents to rot when the contents are food or the like. Therefore, a product with a defective seal is treated as a defective product. Therefore, at the manufacturing site of this type of packaged product, a seal inspection for inspecting the quality of the seal of the packaging bag is usually performed at an appropriate timing so that a defective product is not shipped.

The seal inspection may be performed manually, for example, after the manufacturing is completed, or may be performed during the manufacturing process by using a sensor. For example, Patent Document 1 discloses an inspection device in which an eddy current sensor is provided in a sealing device in an automatic filling and packaging machine and a sealing failure is determined according to the detection of the sensor.

Recently, packaged products tend to be required to be mass-produced in a short period of time. In this case, manual inspection of the seal causes an excessive load on workers, resulting in many inspection errors such as oversight. There is a risk. Therefore, in order to perform the seal inspection efficiently and accurately, many recent automatic filling and packaging machines are already provided with a configuration for performing the seal inspection at the stage of installation at the manufacturing site.

JP, 2003-112714, A

By the way, even if the existing facility for manufacturing a packaged product is not provided with a seal inspection configuration (hereinafter, a seal inspection function), it may be desired to add the function. At this time, in order to cope with a situation where mass production is required in a short period of time, it is desired that the addition be made in a simple manner without any trouble. Needless to say, the addition of the seal inspection function in such a simple and time-saving manner is desired not only in existing equipment but also in equipment or devices at a stage before installation at the manufacturing site. In addition, it is of course desirable to carry out a highly accurate seal inspection so as not to miss a seal defect or to erroneously detect a seal defect, however simple it may be.

The present invention has been made in consideration of the above circumstances, and is a packaging bag sealing device that incorporates a sealing inspection function in a simple and time-saving manner and that can perform a sealing inspection of a packaging bag with high accuracy, and a packaging bag. It is an object of the present invention to provide a bag seal inspection method and a packaged product manufacturing method.

The present invention is a packaging bag sealing device for sealing an opening of a packaging bag, comprising a pair of seal bars, and a drive unit for moving the pair of seal bars close to and away from each other, and the pair of seal bars. A seal mechanism unit that sandwiches and seals the opening of the packaging bag with a seal bar so as to close the seal bag, and a laser displacement meter for seal inspection that measures the displacement of at least one of the pair of seal bars and the drive unit. A packaging bag seal, which comprises a determination device for determining a sealing failure based on a detection value of the laser displacement meter for seal inspection when the pair of seal bars sandwiches the opening of the packaging bag so as to close the opening. Device.

In the packaging bag sealing apparatus according to the present invention, the seal inspection laser displacement meter is provided in at least one pair corresponding to each of the pair of seal bars, and measures the displacement of each of the pair of seal bars. It may be configured as follows.

In the packaging bag sealing device according to the present invention, the drive unit has a moving member that moves in a uniaxial direction when the pair of seal bars are approached and separated from each other, and the laser displacement meter for seal inspection is the uniaxial The moving member may be irradiated with laser light along a direction to measure the displacement of the moving member.

The packaging bag sealing device according to the present invention is a pair of pressing bars that are provided in the sealing mechanism section and that extend along each of the pair of sealing bars and that can approach and separate from each other. Simultaneously with the sandwiching of the opening of the packaging bag by the seal bar, or before or after the sandwiching, the chuck of the packaging bag provided at a position different from the opening is sandwiched to close the chuck. Further comprising a pair of pressing bars and a laser displacement meter for chuck inspection for measuring the displacement of the pair of pressing bars, wherein the determination device is configured such that when the pair of pressing bars sandwich the chuck portion of the packaging bag. The chuck failure may be determined based on the detection value of the chuck inspection laser displacement meter.

In the packaging bag sealing device according to the present invention, one of the pair of pressing bars is fixed to one of the pair of sealing bars, and the other of the pair of pressing bars is the pair of sealing bars. The pair of pressing bars may be fixed to the other of the bars, and the pair of pressing bars may be configured to sandwich the chuck portion at the same time when the opening portion of the packaging bag is sandwiched by the pair of seal bars.

In the packaging bag sealing device according to the present invention, one of the pair of pressing bars is urged toward the other pressing bar so that the pressing bar can be pushed in a direction away from the other pressing bar. It may have a piece.

Further, the present invention has a pair of seal bars, and a drive unit for moving the pair of seal bars close to and away from each other, and a seal for sandwiching and sealing the opening of the packaging bag by the pair of seal bars so as to close the opening. A seal inspection method for a packaging bag in which an opening is sealed by a mechanism section, wherein a displacement of at least one of the pair of seal bars and the drive section is measured by a laser displacement meter for seal inspection. A step of determining a seal defect based on the detection value of the laser displacement meter for seal inspection when the pair of seal bars sandwiches the opening of the packaging bag so as to close the opening. A seal inspection method.

In the seal inspection method according to the present invention, the seal mechanism portion includes a pair of pressing bars extending along each of the pair of seal bars and configured to be able to approach and separate from each other. At the same time as or before or after the sandwiching of the opening of the packaging bag by the, a pair of chucks configured to close the chuck by sandwiching the chuck of the packaging bag provided at a position different from the opening. A pressure bar is further provided, and the seal inspection method includes a step of measuring displacement of the pair of pressure bars with a laser displacement meter for chuck inspection, and the pair of pressure bars is the chuck portion of the packaging bag. And a step of determining a chuck failure based on a detection value of the chuck inspection laser displacement meter when the chuck is sandwiched.

Further, the present invention, a step of filling the contents into the packaging bag through the opening of the packaging bag with one end open, a pair of seal bars, and a drive unit for moving the pair of seal bars closer to and away from each other. With a sealing mechanism portion that sandwiches and seals the opening of the packaging bag by the pair of seal bars so as to close the opening of the packaging bag, and seals the opening of the packaging bag and the pair of seal bars and the drive unit. A step of measuring the displacement of at least one of them with a laser displacement meter for seal inspection, and the laser displacement meter for seal inspection when the pair of seal bars are sandwiched so as to close the opening of the packaging bag. And a step of determining a seal defect based on the detection value of 1.

In the method for manufacturing a packaged product according to the present invention, the sealing mechanism portion is a pair of pressing bars that extend along each of the pair of sealing bars and are configured to be able to approach and separate from each other, Simultaneously with the sandwiching of the opening of the packaging bag by the seal bar, or before or after the sandwiching, the chuck of the packaging bag provided at a position different from the opening is sandwiched to close the chuck. A pair of pressing bars is further provided, and the manufacturing method of the packaged product is such that the chuck portion of the packaging bag is sandwiched by the pair of pressing bars, and the displacement of the pair of pressing bars is determined by a chuck inspection laser. Further comprising a step of measuring with a displacement meter, and a step of judging a chuck failure based on a detection value of the laser displacement meter for chuck inspection when the pair of pressing bars sandwich the chuck portion of the packaging bag. You may stay.

ADVANTAGE OF THE INVENTION According to this invention, the sealing apparatus for a packaging bag which can incorporate the sealing inspection function in a simple mode which does not require much labor, and can perform the sealing inspection of a packaging bag accurately, the sealing inspection method of a packaging bag, and the manufacturing method of a packaging product. Can be provided.

It is a schematic diagram before a sealing operation of a packaging bag sealing device concerning a 1st embodiment of the present invention. It is the schematic at the time of the sealing operation of the packaging bag sealing device shown in FIG. It is a top view of the principal part of the sealing device for packaging bags shown in FIG. It is the schematic of the packaging bag sealing apparatus which concerns on the 2nd Embodiment of this invention. It is a schematic diagram of the packaging bag sealing device concerning a 3rd embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 shows a schematic view of a packaging bag sealing device 1 according to a first embodiment of the present invention. The packaging bag sealing device 1 (hereinafter, sealing device 1) according to the present embodiment sandwiches and seals the opening 100A of the packaging bag 100 after filling the content C with one end opened so as to be closed, The packaging bag 100 is configured as a device for pressing and closing the chuck portion 100B provided adjacent to the opening 100A.

In the illustrated example, the packaging bag 100 is formed in a rectangular shape when viewed from the front, and in a state before the opening 100A is sealed by the sealing device 1, the side portion located at one end where the opening 100A opens is formed. The remaining three sides except for are in a sealed state. The opening 100A described above is an area set on the one end side that is the open side of the packaging bag 100 as shown in FIG. 1, and means an area sealed by the sealing device 1.

The chuck portion 100B is provided as a member for opening and closing the packaging bag 100 when the opening portion 100A is opened after sealing. In the illustrated example, the chuck portion 100B is provided on the inner surface of the packaging bag 100 on the side opposite to the opening 100A. As an example, the chuck portion 100B includes a male member provided on one of a pair of inner surfaces of the packaging bag 100 facing each other and a female member provided on the other, and the male member is pressed toward the female member. Then, the packaging bag 100 can be opened and closed by being locked.

Further, in FIG. 1, the packaging bag 100 is supported by the transfer robot 110. The transfer robot 110 has, for example, an arm portion 111 rotatable about a rotation axis C1 extending in the vertical direction, and a pair of hand portions 112 provided at the tip of the arm portion 111, and a pair of hand portions. The packaging bag 100 is supported by sandwiching both side edges of the packaging bag 100 with 112. The transport robot 110 rotates about a rotation axis C1 to position the packaging bag 100 at the seal preparation position of the sealing device 1 shown in FIG. 1, and after sealing, separates the packaging bag 100 from the seal preparation position and seals the packaging bag. Remove 100 (packaged product). Further, the transport robot 110 supports the new packaging bag 100 and positions it at the sealing preparation position after the sealed packaging bag 100 is removed.

The sealing device 1 according to the present embodiment includes a pair of seal bars 11 for sealing the opening 100A of the packaging bag 100, a pair of pressing bars 12 for pressing the chuck portion 100B, and each of these bars 11, 12. A seal mechanism unit 10 having a driving unit 14 for driving, a laser displacement meter 21 for seal inspection for measuring displacement of a pair of seal bars 11, and a laser displacement meter 22 for chuck inspection for measuring displacement of a pair of pressing bars 12. , A determination device 30 electrically connected to each of the laser displacement meters 21 and 22.

In the seal mechanism unit 10, each of the pair of seal bars 11 is formed in an elongated shape, extends along the longitudinal direction in the first direction (direction orthogonal to the paper surface of FIG. 1) in the horizontal plane, and In, the second direction orthogonal to the first direction can be moved toward and away from each other. Each of the seal bars 11 has a main body 11A and a heat seal portion 11B, and is arranged so that the heat seal portions 11B face each other. The pair of seal bars 11 heat the opening 100A by the heel seal portion 11B when the opening 100A of the packaging bag 100 is sandwiched. As a result, the opening 100A is heat-sealed and sealed.

In the following description, the seal bar disposed on the left side in FIG. 1 of the pair of seal bars 11 may be referred to as a “first seal bar 11L”, and the other seal bar may be referred to as a “second seal bar”. 11R" in some cases. In addition, the above-described first direction is referred to as a “width direction”, and the above-described second direction is referred to as a “separation/contact direction”.

Each of the pair of pressing bars 12 is formed in an elongated shape similarly to the pair of seal bars 11, extends in the width direction along each of the pair of seal bars 11, and is separated from each other in the separation/contact direction similar to the seal bar 11. It is configured to be able to approach and separate. In the following, the pressing bar arranged on the left side in FIG. 1 of the pair of pressing bars 12 may be referred to as “first pressing bar 12L”, and the other pressing bar may be referred to as “second pressing bar 12R”. There are cases.

As shown in FIG. 1, in the present embodiment, the first pressing bar 12L is fixed to the first seal bar 11L and the second pressing bar 12R is fixed to the second seal bar 11R. Therefore, the pair of seal bars 11 and the pair of pressing bars 12 move together. As a result, in the present embodiment, the pair of pressing bars 12 sandwiches the chuck portion 100B at the same time that the opening portion 100A of the packaging bag 100 is sandwiched by the pair of seal bars 11.

In addition, in the present embodiment, the second pressing bar 12R of the pair of pressing bars 12 is housed in the main body 12B having the concave portion 12A that opens toward the first pressing bar 12L side and the concave portion 12A of the main body 12B. The contact piece 12C and the elastic member 12D provided between the contact piece 12C and the bottom surface of the recess 12A are included. The contact piece 12C is biased toward the first pressing bar 12L by the elastic member 12D so as to be able to be pushed in a direction in which the contact piece 12C is separated from the first pressing bar 12L. Thus, when the pair of pressing bars 12 sandwich the chuck portion 100B, the contact piece 12C retracts against the elastic force of the elastic member 12D, so that the chuck portion 100B can be effectively pressed. Has become.

The drive unit 14 includes a drive source 15 and a link mechanism unit 16, and transmits the driving force of the drive source 15 to the pair of seal bars 11 via the link mechanism unit 16, and thereby the pair of seal bar units. 11 and the pair of pressing bars 12 are interlocked with each other so as to approach and separate from each other.

The drive source 15 is, for example, an air cylinder, and has a plunger 15A that can move back and forth. In the illustrated example, the drive source 15 is arranged outside the first seal bar 11L in the separation/contact direction with the plunger 15A facing upward. The drive source 15 may be configured to drive the plunger 15A by an electric motor or the like. The link mechanism unit 16 distributes and transmits the driving force generated by the forward/backward movement of the plunger 15A to the first seal bar 11L and the second seal bar 11R.

Specifically, in the illustrated link mechanism 16, one end portion is rotatably connected to the tip end portion of the plunger 15A and an intermediate portion between the one end portion and the other end portion extends in the width direction of the seal bar 11. A main link 161 rotatably supported by the portion 161A and the other end of which is arranged at a position more distant from the seal bar 11L than one end thereof, and one end of the main link 161 which is connected to the tip of the plunger 15A. Part and a shaft part 161A, one end of which is rotatably connected to the first sub-link 162 that extends in a direction away from the seal bar 11, and the other end of the first sub-link 162 is rotatably connected. The first slide member 163, which is held so as to reciprocate in the separating/contacting direction of the seal bar 11, the first arm 164 connecting the first slide member 163 and the first seal bar 11L, and the main link 161 A second sub-link 165 having one end rotatably connected to the end and extending in a direction away from the seal bar 11, and a second sub-link 165 rotatably connected to the other end of the second sub-link 165 and separating the seal bar 11 from each other. It has the 2nd slide member 166 hold|maintained so that reciprocating movement is possible in a contact direction, and the 2nd arm 167 which connects the 2nd slide member 166 and the 2nd seal bar 11R. In the illustrated example, the tip of the plunger 15A is connected to the main link 161 by inserting a shaft (not shown) into an elongated hole formed in one end of the main link 161.

In the seal mechanism portion 10 having the above-described configuration, when the plunger 15A of the drive source 15 advances from the state shown in FIG. 1, the main link 161 rotates about the shaft portion 161A as shown in FIG. The 1st sublink 162 is pulled to the seal bar 11 side, and the 2nd sublink 165 is pushed to the opposite side to the seal bar 11 side. As a result, the first slide member 163 moves to the seal bar 11 side, and the second slide member 166 moves to the side opposite to the seal bar 11 side. As a result, the opening 100A can be sandwiched by the first seal bar 11L and the second seal bar 11R, and the chuck portion 100B can be sandwiched by the first pressing bar 12L and the second pressing bar 12R.

In the present embodiment, the seal inspection laser displacement meter 21 includes a first seal inspection laser displacement meter 21L and a second seal inspection laser displacement meter 21L, which are arranged outside the first seal bar 11L in the separation/contact direction, as shown in FIG. It is a combination with the second seal inspection laser displacement meter 21R arranged outside the seal bar 11R in the separation/contact direction. The first seal inspection laser displacement meter 21L irradiates the outer surface of the first seal bar 11L with laser light to measure the displacement of the first seal bar 11L in the separation/contact direction, and the second seal. The inspection laser displacement meter 21R irradiates the outer surface of the second seal bar 11R with laser light to measure the displacement of the second seal bar 11R in the contact/separation direction.

FIG. 3 is a view of the seal bar 11 seen from above. In the present embodiment, as shown in FIG. 3, two seal displacement laser displacement gauges 21L and 21R are combined in the width direction (two pairs). Is provided). Specifically, one of the combinations of the two laser displacement meters for seal inspection 21L and 21R is provided on one side in the width direction, and the other of the combinations of the two laser displacement meters for seal inspection 21L and 21R is It is provided on the other side in the width direction. In addition, in FIG. 3, a partial cross section of a bracket 17, which will be described later, in which each laser displacement meter is provided is shown. Further, in the present embodiment, two combinations of the laser displacement meters 21L and 21R are provided on one side and the other side in the width direction, but the greater the number of such combinations installed, the higher the inspection accuracy. Since it can be achieved, it is preferable to provide a plurality thereof so as not to be complicated.

On the other hand, in the chuck inspection laser displacement meter 22, similarly, the first chuck inspection laser displacement meter 22L arranged outside the first pressing bar 12L and the second pressing bar 12R in the separating direction. It is a combination with the second chuck inspection laser displacement meter 22R arranged outside. As shown in FIG. 3, two chuck inspection laser displacement meters 22L and 22R are also provided in the width direction (two pairs), and two chuck inspection laser displacement meters 22L and 22R are combined. One is provided on one side in the width direction, and the other of the combinations of the two chuck inspection laser displacement meters 22L and 22R is provided on the other side in the width direction. The chuck inspection laser displacement meters 22L and 22R measure the displacement of the corresponding pressing bar by the same method as the above-described seal inspection laser displacement meters 21L and 21R.

In the present embodiment, as shown in FIG. 1, a bracket 17 having an upper wall portion and side wall portions extending downward from both ends of the upper wall portion is arranged in a suspended state. The pressing bar 12 is surrounded from above and from one side and the other side in the contact and separation direction. As shown in FIGS. 1 and 3, one side wall portion of the bracket 17 is provided with a first seal inspection laser displacement meter 21L and a first chuck inspection laser displacement meter 22L, and the other is provided with a second seal inspection laser displacement meter 22L. Laser displacement meter 21R and second chuck inspection laser displacement meter 22R are provided. Since each laser displacement meter is provided by such a simple bracket 17, each laser displacement meter is easily installed.

In addition, the determination device 30 outputs the detection values of the laser displacement meter for seal inspection 21 (21L, 21R) and the laser displacement meter for chuck inspection 22 (22L, 22R), and based on the detection values of these displacement meters, the seal is detected. It is designed to determine whether the packaging bag 100 sealed and pressed by the mechanism unit 10 has a defective seal or a defective chuck.

Specifically, for example, the determination device 30 according to the present embodiment has a predetermined detection value of the laser displacement meter for seal inspection 21 when the pair of seal bars 11 sandwiches the opening 100A of the packaging bag 100 so as to close the opening 100A. When the difference between the detected value and the threshold value exceeds a predetermined range, it is determined that the opening 100 has a defective seal. In particular, when the determination device 30 compares the total value of the first seal inspection laser displacement meter 21L and the second seal inspection laser displacement meter 21R with a predetermined threshold value, comparison is made when there is one laser displacement meter on one side. Thus, it is possible to make a highly accurate determination. Further, in the present embodiment, since two combinations of the first seal inspection laser displacement meter 21L and the second seal inspection laser displacement meter 21R are provided, the determination device 30 determines the seal based on the detection value of each combination. A defect can be determined and the inspection accuracy can be improved.

In addition, the determination device 30 compares the detection value of the chuck inspection laser displacement meter 22 when the pair of pressing bars 12 are sandwiched so as to close the chuck portion 100B of the packaging bag 100 with a predetermined threshold value, and the detection value is detected. When the difference between the threshold value and the threshold value exceeds a predetermined range, it is determined that the chuck portion 100B has a chuck failure. Similar to the case of the opening 100A, in the determination, the total value of the first chuck inspection laser displacement meter 22L and the second chuck inspection laser displacement meter 22R may be compared with a predetermined threshold value.

Next, a method for manufacturing a packaged product using the sealing device 1 according to the present embodiment and a seal inspection method performed during the process will be described with reference to FIGS. 1 and 2.

First, the content C is filled in the packaging bag 100 through the opening 100A of the packaging bag 100 with one end opened. Then, in the present embodiment, the packaging bag 100 is positioned at the seal preparation position shown in FIG. 1 by the transfer robot 110.

Next, as shown in FIG. 2, the drive unit 14 is driven to sandwich and seal the opening 100A of the packaging bag 100 by the pair of seal bars 11. In the present embodiment, the opening 100A is sealed by heat welding by heating the opening 100A with the heat seal portion 11B with the pair of seal bars 11 sandwiching the opening 100A. In addition, at this time, in the present embodiment, the seal inspection laser displacement meter 21 measures the displacement of the pair of seal bars 11 and outputs the displacement to the determination device 30.

Further, in the present embodiment, at the same time as being sandwiched by the seal bar 11, the chuck portion 100B of the packaging bag 100 is sandwiched by the pair of pressing bars 12 and the chuck portion 100B is closed. At this time, the chuck inspection laser displacement meter 22 measures the displacement of the pair of pressing bars 12 and outputs the displacement to the determination device 30.

Next, the determination device 30 determines a sealing failure based on the detection value of the laser displacement meter for seal inspection 21 when the pair of seal bars 11 sandwiches the opening 100A of the packaging bag 100 so as to close the opening 100A. At the same time, the determination device 30 determines the chuck failure based on the detection value of the chuck inspection laser displacement meter 22 when the pair of pressing bars 12 sandwich the chuck portion 100B of the packaging bag 100. After that, for example, the packaging bag 100 (packaged product) containing the content C, which is determined to have a defective seal and/or a defective chuck, is detached from the transport robot 110 at a position different from a normal packaged product. As a result, it is possible to manufacture a packaged product while selecting a product having a seal defect and/or a chuck defect and a normal product.

In the present embodiment described above, the displacement of the pair of seal bars 11 is measured by the seal inspection laser displacement meter 21, and the pair of seal bars 11 sandwiches the opening 100A of the packaging bag 100 so as to close the opening 100A. A seal defect is determined based on the detection value of the laser displacement meter 21. In this configuration, the displacement of the seal bar 11 can be measured by irradiating the seal bar 11 with laser light by the laser displacement meter 21, and the seal inspection can be performed based on the measurement of this displacement. Further, the laser displacement meter 21 can measure the displacement with high resolution (for example, micron order or nano order) even if it is relatively inexpensive, so that the seal inspection can be performed with high accuracy. Further, since the laser displacement meter 21 can measure the displacement of the seal bar 11 at a position distant from the seal bar 11 which can reach a high temperature, particularly at a normal temperature region, it is possible to prevent heat or electricity from adversely affecting the inspection accuracy. In addition, the occurrence of damage is suppressed.

Therefore, the seal inspection function can be incorporated in a simple and time-saving manner and the seal inspection of the packaging bag 100 can be performed accurately. Further, according to the configuration in which the laser displacement meter 21 measures the displacement of the seal bar 11 at a position apart from the seal bar 11, it is possible to suppress the thermal or electrical influence of the laser displacement meter 21 on the seal bar 11. Therefore, it is possible to obtain an effect that the deterioration of the quality of the seal can be suppressed. Further, in particular, in the present embodiment, the laser displacement meter 21 directly measures the displacement of the seal bar 11, so that the displacement can be measured with high accuracy.

Furthermore, at least one pair (21L, 21R), specifically, two pairs of the seal inspection laser displacement gauges 21 are provided corresponding to each of the pair of seal bars 11 (11L, 11R). Each displacement of is measured. As a result, the displacement of the seal bar 11 when the seal bar 11 sandwiches the opening 100A is precisely measured, so that the determination device 30 can determine the seal defect with high accuracy.

Further, the seal mechanism section 10 has a pair of pressing bars 12 for pressing the chuck section 100B. Then, in the present embodiment, the displacement of the pair of pressing bars 12 is measured by the chuck inspection laser displacement meter 22, and the laser when the pair of pressing bars 12 sandwiches the chuck portion 100B of the packaging bag 100 so as to be closed. A chuck failure is determined based on the detection value of the displacement meter 22. This makes it possible to efficiently determine whether the seal is defective or the chuck is defective.

Particularly, in the present embodiment, the first pressing bar 12L of the pair of pressing bars 12 is fixed to the first seal bar 11L of the pair of sealing bars 11, and the second pressing of the pair of pressing bars 12 is performed. The bar 12R is fixed to the second seal bar 11R of the pair of seal bars 11. Then, the pair of pressing bars 12 sandwiches the chuck portion 100B at the same time when the opening portion 100A of the packaging bag 100 is sandwiched by the pair of seal bars 11. As a result, it is possible to determine the seal failure and the chuck failure in parallel, and it is possible to effectively improve the inspection efficiency.

(Second embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG. The same components in the present embodiment as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

In the first embodiment, the first seal inspection laser displacement meter 21L and the first chuck inspection laser displacement meter 22L are provided outside the first seal bar 11L and the first pressing bar 12L in the separation/contact direction. A second seal inspection laser displacement meter 21R and a second chuck inspection laser displacement meter 22R are provided outside the two seal bars 11R and the first pressing bar 12R in the separation/contact direction. Instead of this, in the present embodiment, as shown in FIG. 4, the displacement of the first seal bar 11L and the first pressure bar 12L to the outside in the separation/contact direction of the first seal bar 11L and the first pressure bar 12L. A common laser displacement meter 23L for simultaneously measuring

When the first seal bar 11L and the first pressing bar 12L move integrally, the displacement of the first seal bar 11L and the first pressing bar 12L can be simultaneously measured by the single common laser displacement meter 23L. .. According to such an embodiment, the sealing device 1 can be simplified. As a modified example, a single laser displacement meter that simultaneously measures the displacements of the second seal bar 11R and the first pressure bar 12R even on the outer side in the separation/contact direction of the second seal bar 11R and the first pressure bar 12R is provided. You may be asked.

(Third Embodiment)
Subsequently, a third embodiment of the present invention will be described with reference to FIG. The same components as those in the first and second embodiments of the present embodiment are designated by the same reference numerals, and the description thereof will be omitted.

In the first embodiment, the displacement of the pair of seal bars 11 is directly measured by the laser displacement meter for seal inspection 21. Instead of this, in the present embodiment, the displacement of the drive unit 14 is measured by the seal inspection laser displacement meters 24L and 24R. Specifically, as shown in FIG. 5, the seal inspection laser displacement meter 24L is adapted to measure the displacement of the first slide member 163 of the link mechanism portion 16 of the drive unit 14, and the seal inspection The laser displacement meter 24R for use measures the displacement of the second slide member 166 of the link mechanism section 16.

Specifically, the seal inspection laser displacement meter 24L emits a laser beam along the separating/contacting direction on the end surface of the first slide member 163 opposite to the seal bar 11 side that moves in the separating/contacting direction corresponding to the uniaxial direction. Irradiation is performed and the displacement of the first slide member 163 is measured. Thereby, the laser displacement meter for seal inspection 24L can indirectly measure the displacement of the first seal bar 11L of the pair of seal bars 11. In addition, in this example, the displacement of the first pressing bar 12L can also be measured.

On the other hand, the seal inspection laser displacement meter 24R measures the displacement of the second slide member 166 by irradiating the end surface of the second slide member 166 on the side opposite to the seal bar 11 side with a laser beam along the separating direction. To do. Thus, the laser displacement meter for seal inspection 24R can indirectly measure the displacement of the second seal bar 11R of the pair of seal bars 11. In addition, in this example, the displacement of the second pressing bar 12R can also be measured.

In such an embodiment, since the laser displacement gauges 24L and 24R are provided at positions separated from the periphery of the seal bar 11 where a plurality of members are integrated, the degree of freedom in installation of these laser displacement gauges increases, so The displacement meters 24L and 24R can be easily installed. As a modification, for example, the displacement of the plunger 15A or the like of the drive unit 14 may be measured by a laser displacement meter. Further, the displacement of the seal bar 11 may be measured by the laser displacement meter, and the displacement of any member in the drive unit 14 may be measured by the laser displacement meter.

Although the respective embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be added. For example, in each of the above-described embodiments, the seal bar 11 seals the opening 100A of the packaging bag 100 with the heat seal part 11B, but instead of the heat seal part 11B, an ultrasonic seal part or a current impulse type seal part is used. A seal part may be adopted.

Further, in each of the above-described embodiments, the pressing bar 12 is fixed to the seal bar 11, but these may be separated. In this case, the sandwiching of the opening portion 100A of the seal bar 11 and the sandwiching of the chuck portion 100B of the pressing bar 12 may be at the same timing, or the pressing bar 12 is located before the sandwiching of the opening portion 100A of the sealing bar 11. Alternatively, the chuck portion 100B may be sandwiched later.

1 Packaging Bag Sealing Device 10 Sealing Mechanism Part 11 Sealing Bar 11L First Sealing Bar 11R Second Sealing Bar 12 Pressing Bar 12C Abutting Piece 12L First Pressing Bar 12R Second Pressing Bar 14 Driving Part 15 Driving Source 16 Linking Mechanism Part 163 First slide member 166 Second slide member 21 Laser displacement meter for seal inspection 21L Laser displacement meter for first seal inspection 21R Laser displacement meter for second seal inspection 22 Laser displacement meter for chuck inspection 22L First chuck inspection laser displacement Total 22R Laser displacement meter for second chuck inspection 23L Common laser displacement meter 30 Judgment device 100 Packaging bag 100A Opening 100B Chuck part

Claims (5)

A packaging bag sealing device for sealing an opening of a packaging bag, comprising:
A pair of seal bars, and a drive unit that causes the pair of seal bars to approach and separate from each other, and a seal mechanism unit that sandwiches and seals the opening of the packaging bag by the pair of seal bars so as to close the opening,
A laser displacement meter for seal inspection, which measures the displacement of at least one of the pair of seal bars and the drive unit,
A pair of pressing bars that are provided in the seal mechanism section and that extend along each of the pair of seal bars and that can approach and separate from each other, the opening portion of the packaging bag formed by the pair of seal bars. Simultaneously with the sandwiching or before or after the sandwiching, a pair of pressing bars configured to close the chuck by sandwiching the chuck of the packaging bag provided at a position different from the opening,
A laser displacement meter for chuck inspection that measures the displacement of the pair of pressing bars,
Based on the detection value of the laser displacement meter for seal inspection when the pair of seal bars are sandwiched so as to close the opening of the packaging bag, a seal defect is determined, and the pair of pressing bars is the packaging bag. Based on a detection value of the laser displacement meter for chuck inspection when the chuck part is sandwiched, a determination device for determining a chuck failure,
A packaging bag sealing device comprising: One of the pair of pressing bars is fixed to one of the pair of seal bars, the other of the pair of pressing bars is fixed to the other of the pair of seal bars,
The pair of pressing bars sandwiches the chuck portion at the same time when the opening portion of the packaging bag is sandwiched by the pair of seal bars.
The packaging bag sealing device according to claim 1. One of the pair of pressing bars has an abutment piece that is urged toward the other pressing bar so that it can be pushed in a direction away from the other pressing bar.
The packaging bag sealing device according to claim 2. A pair of seal bars and a drive unit for moving the pair of seal bars close to and away from each other, and the pair of seal bars sandwiches and seals the opening of the packaging bag so as to seal the opening. A method for inspecting the seal of a packaging bag in which
The sealing mechanism portion includes a pair of pressing bars extending along each of the pair of sealing bars and capable of approaching and separating from each other, and sandwiching the opening of the packaging bag by the pair of sealing bars. Simultaneously with, or before or after the sandwiching, a pair of pressing bars configured to close the chucking portion of the packaging bag provided at a position different from the opening by closing the chucking portion is further provided. ,
A step of measuring the displacement of at least one of the pair of seal bars and the drive section with a laser displacement meter for seal inspection,
Based on the detection value of the laser displacement meter for seal inspection when sandwiching the pair of seal bars so as to close the opening of the packaging bag, a step of determining a seal defect,
Measuring the displacement of the pair of pressing bars with a chuck inspection laser displacement meter;
Based on the detection value of the laser displacement meter for chuck inspection when the pair of pressing bars sandwiches the chuck portion of the packaging bag, a step of determining a chuck failure,
A method for inspecting the seal of a packaging bag, comprising: Filling the contents into the packaging bag through the opening of the packaging bag with one end open,
A pair of seal bars, and a drive unit for moving the pair of seal bars close to and away from each other, and the pair of seal bars sandwiches the opening of the packaging bag so as to close and seal the package by a seal mechanism unit. Along with sealing the opening of the bag, measuring the displacement of at least one of the pair of seal bars and the drive unit with a laser displacement meter for seal inspection,
Based on the detection value of the laser displacement meter for seal inspection when sandwiching the pair of seal bars so as to close the opening of the packaging bag, a step of determining a seal defect,
A method of manufacturing a packaged product comprising:
The sealing mechanism portion includes a pair of pressing bars extending along each of the pair of sealing bars and capable of approaching and separating from each other, and sandwiching the opening of the packaging bag by the pair of sealing bars. Simultaneously with, or before or after the sandwiching, a pair of pressing bars configured to close the chucking portion of the packaging bag provided at a position different from the opening by closing the chucking portion is further provided. ,
The manufacturing method of the packaged product is
A step of sandwiching the chuck part of the packaging bag by the pair of pressing bars, and measuring the displacement of the pair of pressing bars with a laser displacement meter for chuck inspection,
A method of manufacturing a packaged product, further comprising: determining a chuck failure based on a detection value of the chuck inspection laser displacement meter when the pair of pressing bars sandwiches the chuck portion of the packaging bag.

Images