JP2017030788A - Seal device for packaging bag, seal inspection method of packaging bag, and manufacturing method of packaging product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seal device for a packaging bag which can incorporate a seal inspection function in a simple mode saving labor, and can accurately perform seal inspection.SOLUTION: A seal device 1 for a packaging bag comprises: a seal mechanism part 10 which comprises a pair of seal bars 11 and a drive part 14 for bringing the pair of seal bars 11 closer to each other or away from each other, and sandwiches and seals an opening part 100A of a packaging bag 100 by the pair of seal bars 11 so as to close the opening part; a laser displacement meter 21 for seal inspection for measuring displacement of the pair of seal bars 11; and a determination device 30 for determining sealing failure, based on a detection value of the laser displacement meter 21 for seal inspection when the pair of seal bars 11 sandwiches the opening part 100A of the packaging bag 100 so as to close the opening part.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a packaging bag sealing device, a packaging bag seal 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 thermally welded and sealed by heating or the like. The

  In this type of automatic filling and packaging machine, the content may adhere to the opening of the packaging bag if the amount of the content is large at the time of filling or if the content is not smoothly supplied to the packaging bag. In this state, when the packaging bag is sealed, the sealed state becomes insufficient and a sealing failure occurs.

  Generation | occurrence | production of the sealing failure may cause discharge | release from the packaging bag of a content, or when the content is a foodstuff etc., it may cause the content to rot. Therefore, a product in which a seal failure has occurred is treated as a defective product. Therefore, at the production 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 defective products are not shipped.

  For example, the seal inspection may be performed manually 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 seal failure is determined in accordance with detection of the sensor.

  Packaged products tend to require mass production in the short term in recent years. In this case, manual seal inspection results in excessive load on workers, resulting in many inspection errors such as oversight. There is a fear. For this reason, in order to efficiently and accurately perform the seal inspection, many of the 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 a configuration for performing a seal inspection (hereinafter referred to as a seal inspection function) is not provided in existing equipment for manufacturing a packaged product, it may be desired to add the function. In this case, 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 that does not require time and effort. Needless to say, the addition of the seal inspection function in such a simple and trouble-free manner is desired not only in the existing equipment but also in the equipment or apparatus at the stage prior to installation at the manufacturing site. Further, it is a matter of course that it is desirable to perform a seal inspection with a high degree of accuracy so as not to cause a missed seal or an erroneous detection, no matter how simple it is.

  The present invention has been made in consideration of the above circumstances, and incorporates a seal inspection function in a simple and labor-saving manner and can accurately perform a seal inspection of a packaging bag, and a packaging 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 toward and away from each other. A seal mechanism that sandwiches and seals the opening of the packaging bag with a seal bar; 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; And a determination device for determining a seal failure based on a 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. Device.

  In the packaging bag sealing device 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 includes a moving member that moves in a uniaxial direction when the pair of seal bars approach and separate from each other, and the laser inspection meter for seal inspection includes the uniaxial The moving member may be irradiated with laser light along a direction so as to measure the displacement of the moving member.

  The packaging bag sealing device according to the present invention is a pair of pressing bars provided in the sealing mechanism portion, extending along each of the pair of sealing bars and configured to be able to approach and separate from each other. At the same time as or before or after the insertion of the opening of the packaging bag by the seal bar, the chuck is closed by sandwiching the chuck of the packaging bag provided at a position different from the opening. And a chuck inspection laser displacement meter for measuring the displacement of the pair of press bars, wherein the determination device is configured such that the pair of press bars sandwich the chuck portion of the packaging bag. A chuck failure may be determined based on a 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 seals. The pair of pressing bars may be configured to sandwich the chuck portion simultaneously with the opening of the packaging bag by the pair of seal bars.

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

  The present invention also includes a pair of seal bars and a drive unit that moves the pair of seal bars toward and away from each other, and seals the pair of seal bars so that the opening of the packaging bag is closed by the pair of seal bars. A seal inspection method for a packaging bag in which an opening is sealed by a mechanism, wherein the displacement of at least one of the pair of seal bars and the drive unit is measured by a laser displacement meter for seal inspection. A step of determining a seal failure based on a 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 inspection method.

  In the seal inspection method according to the present invention, the seal mechanism portion includes a pair of pressing bars that extend along each of the pair of seal bars and can be moved toward and away from each other. A pair of pins configured to close the chuck portion by sandwiching the chuck portion of the packaging bag provided at a position different from the opening portion at the same time or before or after the sandwiching of the opening portion of the packaging bag by A pressing bar is further provided, and the seal inspection method includes a step of measuring displacement of the pair of pressing bars with a laser displacement meter for chuck inspection, and the pair of pressing bars is the chuck portion of the packaging bag. And a step of determining a chuck failure based on a detected value of the chuck inspection laser displacement meter when the chuck is inserted.

  The present invention also includes a step of filling the packaging bag with the contents through the opening of the packaging bag with one end open, a pair of seal bars, and a drive unit that causes the pair of seal bars to approach and separate from each other. The opening of the packaging bag is sealed by the pair of seal bars so as to close the opening of the packaging bag so as to be closed, and the opening of the packaging bag is sealed. A step of measuring a 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 failure based on the detected value.

  In the method of manufacturing a packaged product according to the present invention, the seal mechanism portion includes a pair of pressing bars that extend along each of the pair of seal bars and that can be approached and separated from each other. The chuck part is configured to be closed by sandwiching the chuck part of the packaging bag provided at a position different from the opening part at the same time as or before or after the sandwiching of the opening part of the packaging bag by the seal bar. A pair of pressing bars is further provided, and the packaging product manufacturing method includes sandwiching the chuck portion of the packaging bag between the pair of pressing bars, and detecting the displacement of the pair of pressing bars with a laser for chuck inspection. The step of measuring with a displacement meter, and the laser displacement for chuck inspection when the pair of pressing bars sandwich the chuck part of the packaging bag The basis of the detection value, may have further comprise a step of determining chuck failure, the.

  According to the present invention, a packaging bag sealing apparatus, a packaging bag seal inspection method, and a packaging product manufacturing method that can incorporate a seal inspection function in a simple and time-saving manner and can accurately perform a packaging bag seal inspection. Can be provided.

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

  Embodiments of the present invention will be described below 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 according to the present embodiment (hereinafter referred to as sealing device 1) seals by sandwiching and sealing the opening portion 100A of the packaging bag 100 after filling the contents C with one end opened, In the packaging bag 100, it is comprised as an apparatus for pressing and closing the chuck | zipper part 100B provided adjacent to the opening part 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, a side portion located at one end where the opening 100A opens is provided. The remaining three sides are sealed. The opening 100A described above is an area set on one end side that is the opening side of the packaging bag 100 as shown in FIG.

  The chuck portion 100B is provided as a member for closing the packaging bag 100 so that it can be opened and closed 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 opposite side of the opening 100A. As an example, the chuck portion 100B includes a male member provided on one of a pair of inner surfaces facing each other of the packaging bag 100 and a female member provided on the other, and presses the male member toward the female member. Thus, the packaging bag 100 can be closed so that it can be opened and closed.

  In FIG. 1, the packaging bag 100 is supported by a transport robot 110. The transfer robot 110 includes, as an example, an arm portion 111 that can rotate around a rotation axis C <b> 1 that extends in the vertical direction, and a pair of hand portions 112 provided at the tip of the arm portion 111. The packaging bag 100 is supported by sandwiching both side edges of the packaging bag 100 by 112. The transfer robot 110 rotates about the rotation axis C1 to position the packaging bag 100 at the seal preparation position of the sealing device 1 shown in FIG. 100 (packaged product) is removed. Further, after the sealed packaging bag 100 is detached, the transfer robot 110 supports the new packaging bag 100 and positions it at the seal preparation position.

  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 and 12. A seal mechanism unit 10 having a driving unit 14 to be driven, a seal inspection laser displacement meter 21 for measuring the displacement of the pair of seal bars 11, and a chuck inspection laser displacement meter 22 for measuring the displacement of the pair of pressing bars 12; And a determination device 30 electrically connected to each of the laser displacement meters 21 and 22.

  In the seal mechanism section 10, each of the pair of seal bars 11 is formed in an elongated shape, extends along the longitudinal direction in the first direction on the horizontal plane (the direction perpendicular to the paper surface of FIG. 1), and the horizontal plane. Are configured to be able to approach and separate from each other in a second direction orthogonal to the first direction. Each of the seal bars 11 has a main body 11A and a heat seal portion 11B, and is arranged in a state in which the heat seal portions 11B face each other. Such a pair of seal bars 11 heats the opening 100A by the heel seal portion 11B when the opening 100A of the packaging bag 100 is sandwiched. Thereby, the opening 100A is thermally welded 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 “first seal bar 11L”, and the other seal bar is referred to as “second seal bar”. May be referred to as “11R”. In addition, the first direction described above is referred to as “width direction”, and the second direction described above is referred to as “separation direction”.

  Each of the pair of pressing bars 12 is formed in a long shape like 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 contact / separation direction similar to the seal bar 11. It is configured to be able to approach and separate. Hereinafter, of the pair of pressing bars 12, the pressing bar arranged on the left side in FIG. 1 may be referred to as “first pressing bar 12L”, and the other pressing bar is referred to as “second pressing bar 12R”. There is a case.

  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. Accordingly, the pair of seal bars 11 and the pair of pressing bars 12 are moved together. Thereby, in this Embodiment, a pair of press bar 12 pinches the chuck | zipper part 100B simultaneously with pinching of the opening part 100A of the packaging bag 100 by a pair of seal bar 11. FIG.

  Further, in the present embodiment, the second pressing bar 12R of the pair of pressing bars 12 is accommodated in the main body 12B having the concave portion 12A that opens toward the first pressing bar 12L and the concave portion 12A of the main body 12B. A contact piece 12C, and an elastic member 12D provided between the contact piece 12C and the bottom surface of the recess 12A. The contact piece 12C is urged toward the first pressing bar 12L by the elastic member 12D so as to be able to be pressed in a direction away from the first pressing bar 12L. Thus, when the pair of pressing bars 12 sandwich the chuck portion 100B, the contact piece 12C moves backward against the elastic force of the elastic member 12D, thereby effectively pressing the chuck portion 100B. It 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, thereby the pair of seal bars. 11 and the pair of pressing bars 12 are configured to be interlocked and separated from each other.

  The drive source 15 is an air cylinder as an example, and has a plunger 15 </ b> A that can move forward and backward. In the illustrated example, the drive source 15 is disposed with the plunger 15A facing upward on the outer side of the first seal bar 11L in the direction of separation. The drive source 15 may be configured to drive the plunger 15A with an electric motor or the like. The link mechanism unit 16 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, the illustrated link mechanism 16 has an end that is rotatably connected to the tip of the plunger 15 </ b> A and an intermediate portion between the one end and the other end extends in the width direction of the seal bar 11. A main link 161 that is rotatably supported by the portion 161A and whose other end portion is disposed at a position farther from the seal bar 11L than one end portion thereof, and one end connected to the tip end portion of the plunger 15A in the main link 161 One end portion of the first sub link 162 is rotatably connected to a portion between the shaft portion and the shaft portion 161 </ b> A and extends in a direction away from the seal bar 11, and the other end portion of the first sub link 162 is rotatably connected. And the first slide member 163 that is held so as to be reciprocally movable in the direction of separation of the seal bar 11 is connected to the first slide member 163 and the first seal bar 11L. A first arm 164, a second sublink 165 that is rotatably connected to the other end of the main link 161 and extends away from the seal bar 11, and a second sublink 165 that is connected to the other end of the second sublink 165. A second slide member 166 that is rotatably connected and is held so as to be able to reciprocate in the separating direction of the seal bar 11, and a second arm 167 that connects the second slide member 166 and the second seal bar 11R. Have. In the illustrated example, the distal end portion of the plunger 15 </ b> A is connected to the main link 161 by inserting a shaft portion (not shown) into a long hole formed in one end portion of the main link 161.

  In the seal mechanism 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 around the shaft 161A as shown in FIG. The first sub link 162 is pulled to the seal bar 11 side, and the second sub link 165 is pushed to the side opposite 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 between the first seal bar 11L and the second seal bar 11R, and the chuck portion 100B can be sandwiched between the first press bar 12L and the second press bar 12R.

  In the present embodiment, as shown in FIG. 1, the seal inspection laser displacement meter 21 includes a first seal inspection laser displacement meter 21L disposed outside the first seal bar 11L, and a second displacement sensor 21L. This is a combination with the second seal inspection laser displacement meter 21R arranged outside the seal bar 11R in the direction of separation. The first seal inspection laser displacement meter 21L irradiates the outer surface of the first seal bar 11L with laser light and measures the displacement of the first seal bar 11L in the contact / separation direction. The inspection laser displacement meter 21R irradiates the outer surface of the second seal bar 11R with laser light and measures the displacement of the second seal bar 11R in the contact / separation direction.

  FIG. 3 is a view of the seal bar 11 as viewed from above. In this embodiment, as shown in FIG. 3, there are two combinations of laser displacement meters 21L and 21R for seal inspection in the width direction (two pairs). Is provided). Specifically, one of the combinations of the two seal inspection laser displacement meters 21L and 21R is provided on one side in the width direction, and the other of the combination of the two seal inspection laser displacement meters 21L and 21R is: It is provided on the other side in the width direction. FIG. 3 shows a cross section of a part of a bracket 17 described later on which each laser displacement meter is provided. In this embodiment, two combinations of the laser displacement meters 21L and 21R are provided on one side and the other side in the width direction. As the number of such combinations is increased, the inspection accuracy is improved. Therefore, it is preferable to provide a plurality of them so as not to become complicated.

  On the other hand, similarly, the chuck inspection laser displacement meter 22 also has a first chuck inspection laser displacement meter 22L disposed outside the first pressing bar 12L and a second pressing bar 12R in the separation direction. This is a combination with the second chuck inspection laser displacement meter 22R arranged outside. As shown in FIG. 3, two combinations (two pairs) of chuck inspection laser displacement meters 22L and 22R are provided in the width direction. Of the combinations of the two chuck inspection laser displacement meters 22L and 22R, Is provided on one side in the width direction, and the other of the combinations of the two chuck displacement 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 in the same manner as the above-described seal inspection laser displacement meters 21L and 21R.

  In the present embodiment, as shown in FIG. 1, the upper wall portion and a bracket 17 having a side wall portion extending downward from both ends of the upper wall portion are arranged in a suspended state. The pressing bar 12 is surrounded from above and from one side and the other side in the separation / contact direction. As shown in FIGS. 1 and 3, a first seal inspection laser displacement meter 21L and a first chuck inspection laser displacement meter 22L are provided on one of the side walls of the bracket 17, and the second seal inspection is performed on the other side. A laser displacement meter 21R and a 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 can be easily installed.

  The determination device 30 outputs detection values of the seal inspection laser displacement meter 21 (21L, 21R) and the chuck inspection laser displacement meter 22 (22L, 22R), and based on the detection value of each displacement meter, the seal A sealing failure and a chuck failure of the packaging bag 100 sealed and pressed by the mechanism unit 10 are determined.

  Specifically, for example, the determination device 30 according to the present embodiment predetermines a detection value of the seal inspection laser displacement meter 21 when the pair of seal bars 11 are sandwiched so as to close the opening 100A of the packaging bag 100. When the difference between the detected value and the threshold value exceeds a predetermined range, it is determined that a seal failure has occurred in the opening 100. In particular, 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, so that comparison is made when the laser displacement meter is one on one side. As a result, it is possible to make a highly accurate determination. 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 detected value of each combination. Defects can be determined, and inspection accuracy can be improved.

  Further, the determination device 30 compares, for example, 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. When the difference between the threshold value and the threshold value exceeds a predetermined range, it is determined that a chuck failure has occurred in the chuck portion 100B. As in 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 manufacturing method of a packaged product using the sealing device 1 according to the present embodiment and a seal inspection method performed in the middle thereof will be described with reference to FIGS. 1 and 2.

  First, the contents C are filled into the packaging bag 100 through the opening 100A of the packaging bag 100 with one end opened. Thereafter, in the present embodiment, the packaging bag 100 is positioned at the seal preparation position shown in FIG.

  Next, as shown in FIG. 2, the drive unit 14 is driven, and the opening 100 </ b> A of the packaging bag 100 is sandwiched and sealed 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 part 11B in a state where the pair of seal bars 11 sandwich the opening 100A. 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, simultaneously with the sandwiching 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 seal failure based on the detected value of the laser displacement meter 21 for seal inspection when the pair of seal bars 11 are sandwiched so as to close the opening 100 </ b> A of the packaging bag 100. At the same time, the determination device 30 determines 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 (packaging product) containing the contents C determined to have a sealing failure and / or a chucking failure is separated from the transport robot 110 at a location different from the normal packaging product. As a result, it becomes possible to manufacture a packaged product while selecting a product in which a seal failure and / or a chuck failure has occurred and a normal product.

  In the present embodiment described above, the displacement of the pair of seal bars 11 is measured by the laser inspection meter 21 for seal inspection, and the pair of seal bars 11 is sandwiched so as to close the opening 100A of the packaging bag 100. Based on the detection value of the laser displacement meter 21, a seal failure is determined. In this configuration, it is possible to measure the displacement of the seal bar 11 by irradiating the laser beam to the seal bar 11 with the laser displacement meter 21 and perform a seal inspection based on the measurement of the displacement. Further, since the laser displacement meter 21 can measure displacement with high resolution (eg, micron order, nano order) even if it is relatively inexpensive, it is possible to perform a seal inspection with high accuracy. Further, since the laser displacement meter 21 can measure the displacement of the seal bar 11 at a position away from the seal bar 11 that can be at a high temperature, particularly in the normal temperature region, it is suppressed that heat and electricity adversely affect the inspection accuracy, In addition, the occurrence of damage is also suppressed.

  Therefore, the seal inspection function can be incorporated in a simple and labor-saving manner, and the seal inspection of the packaging bag 100 can be accurately performed. Further, according to the configuration in which the laser displacement meter 21 measures the displacement of the seal bar 11 at a position away from the seal bar 11, the thermal or electrical influence by the laser displacement meter 21 is suppressed from reaching the seal bar 11. Therefore, the effect that it can suppress that the quality of a seal falls is also acquired. In particular, in the present embodiment, since the laser displacement meter 21 directly measures the displacement of the seal bar 11, the displacement can be measured with high accuracy.

  Further, at least one pair (21L, 21R), specifically two pairs, is provided for the seal inspection laser displacement meter 21 corresponding to each of the pair of seal bars 11 (11L, 11R). Measure the displacement of each. As a result, the displacement of the seal bar 11 when the seal bar 11 sandwiches the opening 100A is strictly measured, so that the determination device 30 can determine the seal failure with high accuracy.

  Further, the seal mechanism portion 10 has a pair of pressing bars 12 for pressing the chuck portion 100B. And this Embodiment measures the displacement of a pair of press bar 12 with the laser displacement meter 22 for chuck | zipper inspection, and the said laser when a pair of press bar 12 is inserted so that the chuck | zipper part 100B of the packaging bag 100 may be closed. Based on the detection value of the displacement meter 22, a chuck failure is determined. Thereby, it is possible to efficiently determine a seal failure and a chuck failure.

  In particular, in the present embodiment, the first pressing bar 12L of the pair of pressing bars 12 is fixed to the first sealing 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. The pair of pressing bars 12 sandwich the chuck portion 100 </ b> B simultaneously with the sandwiching of the opening portion 100 </ b> A of the packaging bag 100 by the pair of seal bars 11. Thereby, since a seal failure and a chuck failure can be determined in parallel, the inspection efficiency can be effectively improved.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG. Components similar to those of the first embodiment in the present embodiment are denoted by the same reference numerals, and description thereof is 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 separating 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 direction of separation. Instead, in the present embodiment, as shown in FIG. 4, the displacement of the first seal bar 11L and the first press bar 12L on the outer side of the first seal bar 11L and the first press bar 12L in the separation / contact direction. A common laser displacement meter 23L is provided for simultaneously measuring.

  When the first seal bar 11L and the first press bar 12L move together, the displacement of the first seal bar 11L and the first press bar 12L can be simultaneously measured by a single common laser displacement meter 23L. . According to such an embodiment, simplification of the sealing device 1 can be achieved. As a modification, a single laser displacement meter that simultaneously measures the displacement of the second seal bar 11R and the first press bar 12R is provided outside the second seal bar 11R and the first press bar 12R. May be.

(Third embodiment)
Subsequently, a third embodiment of the present invention will be described with reference to FIG. Components similar to those in the first and second embodiments in the present embodiment are denoted by the same reference numerals and description thereof is omitted.

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

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

  On the other hand, the laser displacement meter 24R for seal inspection irradiates the end surface of the second slide member 166 opposite to the seal bar 11 side with laser light along the direction of separation, and measures the displacement of the second slide member 166. To do. As a result, the seal inspection laser displacement meter 24 </ b> R can indirectly measure the displacement of the second seal bar 11 </ b> R of the pair of seal bars 11. In this example, the displacement of the second pressing bar 12R can also be measured.

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

  As mentioned above, although each embodiment of this invention was described, this invention can add a various change, without being limited to the above-mentioned embodiment. 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 portion 11B, but instead of the heat seal portion 11B, an ultrasonic seal portion or a current impulse type is used. A seal part may be employed.

  Moreover, in each above-mentioned embodiment, although the press bar 12 is being fixed to the seal bar 11, these may be isolate | 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 performed at the same timing, or the pressing bar 12 is inserted before the opening portion 100A of the sealing bar 11 is sandwiched. Alternatively, the chuck unit 100B may be sandwiched later.

DESCRIPTION OF SYMBOLS 1 Sealing apparatus 10 for packaging bags Seal mechanism part 11 Seal bar 11L 1st seal bar 11R 2nd seal bar 12 Press bar 12C Contact piece 12L 1st press bar 12R 2nd press bar 14 Drive part 15 Drive source 16 Link mechanism part 163 First slide member 166 Second slide member 21 Laser displacement meter 21L for seal inspection Laser displacement meter 21R for first seal inspection Laser displacement meter 22 for second seal inspection Laser displacement meter 22L for chuck inspection Laser displacement for first chuck inspection Total 22R Laser displacement meter 23L for second chuck inspection Common laser displacement meter 30 Determination device 100 Packaging bag 100A Opening portion 100B Chuck portion

Claims (10)

A packaging bag sealing device for sealing an opening of a packaging bag,
A seal mechanism having a pair of seal bars and a drive unit for moving the pair of seal bars toward and away from each other, and sandwiching and sealing the opening of the packaging bag with the pair of seal bars;
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 determination device for determining a seal failure based on a detected 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 packaging bag sealing device. 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.
The sealing device for packaging bags according to claim 1. The drive unit includes a moving member that moves in a uniaxial direction when the pair of seal bars are moved closer to and away from each other.
The seal inspection laser displacement meter measures the displacement of the moving member by irradiating the moving member with laser light along the uniaxial direction.
The sealing device for packaging bags according to claim 1. A pair of pressing bars provided in the sealing mechanism and extending along each of the pair of seal bars and configured to be able to approach and separate from each other, wherein the opening of the packaging bag by the pair of seal bars A pair of pressing bars configured to close the chuck portion by sandwiching the chuck portion of the packaging bag provided at a position different from the opening portion at the same time or before or after the sandwiching;
A chuck inspection laser displacement meter for measuring the displacement of the pair of pressing bars, and
The determination device determines a chuck failure based on a detection value of the chuck inspection laser displacement meter when the pair of pressing bars sandwich the chuck portion of the packaging bag.
The sealing device for packaging bags according to any one of claims 1 to 3. One of the pair of press bars is fixed to one of the pair of seal bars, the other of the pair of press bars is fixed to the other of the pair of seal bars,
The pair of pressing bars sandwich the chuck portion simultaneously with the opening of the packaging bag by the pair of seal bars,
The sealing device for packaging bags according to claim 4. One of the pair of pressing bars has a contact piece that is urged toward the other pressing bar so that the pressing bar can be pushed in a direction away from the other pressing bar.
The sealing device for packaging bags according to claim 5. A seal mechanism having a pair of seal bars and a drive unit for moving the pair of seal bars toward and away from each other, and sealing the seal bag by sandwiching and sealing the opening of the packaging bag with the pair of seal bars. Is a seal inspection method for a packaging bag to be sealed,
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;
A step of determining a seal failure based on a 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 packaging bag seal inspection method comprising: The seal mechanism portion includes a pair of pressing bars extending along each of the pair of seal bars and configured to be close to and away from each other, and sandwiching the opening of the packaging bag by the pair of seal bars A pair of pressing bars configured to close the chuck portion by sandwiching the chuck portion of the packaging bag provided at a position different from the opening portion at the same time as or before or after sandwiching. ,
The seal inspection method is
Measuring the displacement of the pair of pressing bars with a laser displacement meter for chuck inspection;
A step of determining a chuck failure based on a detection value of the chuck inspection laser displacement meter when the pair of pressing bars sandwich the chuck portion of the packaging bag.
The packaging bag seal inspection method according to claim 7. Filling the packaging bag with the contents through the opening of the packaging bag with one end open;
Packaged by a seal mechanism having a pair of seal bars and a drive unit for moving the pair of seal bars toward and away from each other, and sandwiching and sealing the opening of the packaging bag with the pair of seal bars Sealing the opening of the bag, and measuring a displacement of at least one of the pair of seal bars and the driving unit with a laser displacement meter for seal inspection;
A step of determining a seal failure based on a 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 method for manufacturing a packaged product. The seal mechanism portion includes a pair of pressing bars extending along each of the pair of seal bars and configured to be close to and away from each other, and sandwiching the opening of the packaging bag by the pair of seal bars A pair of pressing bars configured to close the chuck portion by sandwiching the chuck portion of the packaging bag provided at a position different from the opening portion at the same time as or before or after sandwiching. ,
The manufacturing method of the packaged product is as follows:
The step of sandwiching the chuck portion of the packaging bag by the pair of pressing bars, and measuring the displacement of the pair of pressing bars with a chuck displacement laser displacement meter,
A step of determining a chuck failure based on a detection value of the chuck inspection laser displacement meter when the pair of pressing bars sandwich the chuck portion of the packaging bag.
A method for manufacturing a packaged product according to claim 9.

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