JP2016120932A - Defective article detection device in horizontal bag making filling machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To take countermeasures by detecting the defect of an article and the defect of a longitudinal sealing part before a cylindrical film is horizontally sealed to complete packaging.SOLUTION: An X-ray inspection unit 40 is installed in a film conveyance section through which a cylindrical film 12a is conveyed in the downward extended state of a longitudinal sealing part 26 from a cylindrical part 25 in an erect attitude. The X-ray inspection unit 40 includes an X-ray generator 42 and an X-ray detector 44 respectively arranged on a front side and a deep side sandwiching a film conveyance path. The X-ray generator 42 radiates X rays to expand within the predetermined range of a vertical direction. The X-ray detector 44 detects X rays transmitted through the cylindrical film 12a. The X-ray detector 44 outputs a detection signal based on the transmitted quantity of detected X ray, and control means 27 determines a defect based on the detection signal from the X-ray detector 44.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a defective product detection apparatus capable of detecting a defect before lateral packaging and packaging is completed in a horizontal bag making and filling machine.

  In the horizontal bag making and filling machine, a belt-like film drawn from a raw fabric roll is formed into a cylindrical shape by bag making means, and articles are sequentially supplied into the obtained cylindrical film via the article supplying means, and the articles are supplied. A vertical seal is applied to the overlapping portion in the longitudinal direction of the cylindrical film, and a so-called pillow package is continuously formed by applying a horizontal seal and cutting before and after sandwiching the cylindrical film article. It is configured to manufacture automatically.

  For pillow packaging products packaged with aluminum wrapping material (aluminum vapor deposition film, aluminum laminate film, etc.) in the horizontal bag making and filling machine, to the seal part of the article by an X-ray inspection device connected to the downstream side of the horizontal bag making and filling machine There is known an apparatus for detecting defective packaged products having defects such as sealing defects caused by pinching, sealing defects, or foreign matter contamination (see, for example, Patent Documents 1 and 2). In the defective product detection apparatus disclosed in Patent Documents 1 and 2, an X-ray generator and an X-ray detector are arranged facing each other on the upper and lower sides of the conveyance path of the pillow package product, and the pillow package is irradiated from the X-ray generator. A defect is detected by detecting an X-ray transmitted through the product with an X-ray detector.

Japanese Patent No. 4170366 JP 2010-107456 A

  As disclosed in Patent Documents 1 and 2, in a configuration in which an X-ray generator and an X-ray detector are arranged opposite to each other on the upper and lower sides of the conveyance path to detect a defective pillow package product, the pillow is conveyed in a lying position. In the packaged product, since the article in the bag and the vertical seal part formed in the middle part of the bag overlap in the vertical direction, detection of defective seals due to the article or other foreign matter being caught in the vertical seal part or seal flaws, etc. It is difficult. In addition, since the pillow package after packaging by the horizontal bag making and filling machine is inspected, it can be discharged out of the system as a packaged defective package, but before the horizontal sealing by the horizontal bag making and filling machine, It is pointed out that problems such as the inevitable packaging due to the foreign matter sandwiched in the seal part and the seal defect such as the seal flaw cannot be avoided.

  That is, the present invention has been proposed in order to solve this problem in view of the above-mentioned problems inherent in the above-mentioned defective product detection apparatus according to the prior art, and is intended for the articles and other foreign matters on the vertical seal portion. Defective product detection in a horizontal bag making and filling machine that can detect and discriminate defects such as pinching and occurrence of seal flaws or misalignment of articles supplied in a cylindrical film before completing the packaging. An object is to provide an apparatus.

In order to overcome the above-mentioned problems and achieve an intended object, a defective product detection apparatus in a horizontal bag making and filling machine according to the invention of claim 1 is provided:
A vertical seal is applied to a superposed part that extends from a cylindrical part in which articles are accommodated at predetermined intervals inside the cylindrical film conveyed by the film conveying means and superposes in a palm-like shape, and the superposed part is said cylindrical part. In the horizontal bag making and filling machine that performs horizontal sealing by sandwiching the cylindrical film with the horizontal sealing means at the front and rear positions of the article supplied to the cylindrical film,
The tubular film being conveyed so that the overlapping portion extends in a vertical position from the tubular portion and traverses the film conveyance path in the film conveyance section where the tubular film is conveyed to the lateral sealing means. An X-ray inspection unit that continuously irradiates X-rays laterally with respect to
The X-ray inspection unit sandwiches the film conveyance path so as to detect the amount of X-ray transmission irradiated to each of the cylindrical portion in the cylindrical film and the formation range of the vertical seal portion in the overlapping portion. An X-ray generator and an X-ray detector are placed facing each other on the left and right,
In the detected X-ray transmission amount, the positional deviation of the article supplied to the cylindrical film is detected from the X-ray transmission amount of the cylindrical portion, and from the X-ray transmission amount of the vertical seal portion, When a defective seal is detected and determined to be defective based on the detection result, a defective signal can be output for each packaging unit obtained from the film conveyance amount of the length of one package conveyed by the film conveying means. It is characterized by that.
According to the first aspect of the present invention, since the defective portion can be detected before the lateral seal is applied, it is possible to take measures before the defective package product is produced, and to prevent the occurrence of the defective package product. obtain. In addition, inspection is performed with the overlapping part extending in a posture standing up from the cylindrical part in which the article is accommodated, so it is possible to accurately detect foreign matter mixing in the vertical seal part, generation of seal flaws, or misalignment of the overlapping part. Can be inspected. Further, it is possible to prevent the article from being bitten by the lateral sealing means by detecting the positional deviation of the article supplied into the cylindrical film.

In the invention which concerns on Claim 2, the said X-ray generator has arrange | positioned the output part so that X-rays may be irradiated toward the back | inner side from the near side of the said film conveyance path, It is characterized by the above-mentioned.
According to the invention which concerns on Claim 2, X-ray is not accidentally irradiated toward the operator who operates on the near side of a packaging machine.

In the invention according to claim 3, when the defect is determined based on the detection result, the film transporting unit until the defective film having a length corresponding to one package including the defective part is subjected to the horizontal sealing by the horizontal sealing unit. The sealing body in the horizontal sealing means is stopped at a position separated from the cylindrical film before the cylindrical film is sandwiched by the sealing body, and is stopped until the defective film passes. Control is performed by either the state control, the operation control of the seal body, or the operation control for stopping the packaging operation for stopping all the operation mechanisms of the packaging machine.
According to the invention of claim 3, when a defect is determined, the horizontal sealing operation by the sealing body is suspended before the defective film reaches the position where the defective film is laterally sealed, or the packaging operation is emergency stopped. Therefore, it is possible to prevent the article from being bitten into the seal body and being damaged, and the lateral sealing means from being damaged by the biting of the article.

In the invention which concerns on Claim 4, the said X-ray inspection unit has arrange | positioned until it reaches the arrangement | positioning position of the bending member which folds the said superimposition part downstream from the said vertical sealing means along a cylindrical part. It is characterized by.
According to the fourth aspect of the present invention, since the vertical seal portion in a state of being sandwiched between the vertical seal means and extending in the vertical direction is inspected, a defect can be accurately detected.

In the invention according to claim 5, the defect detection by the X-ray inspection unit can detect the amount of X-ray transmission by different judgment values in different judgment areas in the cylindrical part and the vertical seal part. It is characterized by that.
According to the invention of claim 5, since the determination area is divided into the cylindrical part and the vertical seal part, it is possible to set an appropriate determination value for each part to increase the detection accuracy of the defect and to make an erroneous determination. Can prevent.

The invention according to claim 6 is characterized in that the film transport section is provided with a partition that allows passage of the overlapping portion and partitions the vertical seal portion and the cylindrical portion up and down.
According to the invention which concerns on Claim 6, since the vertical seal part and the cylindrical part were divided up and down by the partition body, each part can be divided and a defect can be detected favorably.

The invention according to claim 7 is characterized in that the X-ray generator and the X-ray detector are configured such that their positions can be adjusted up and down and to the left and right of the film transport path.
According to the seventh aspect of the present invention, the X-ray generator and the X-ray detector can be appropriately adjusted according to the product type, so that it is possible to deal with packaging of various products.

In the invention according to claim 8, the X-ray covers the upper space from the position where the overlapped portion is vertically sealed to the folding formation position where the overlapped portion is folded along the cylindrical portion. A protective cover made of a transparent resin that can be opened and closed at a closed position for accommodating the inspection unit and an open position at which the upper part is opened, and a detecting means for detecting opening and closing of the protective cover,
X-ray irradiation from the X-ray generator is performed when the closing of the protective cover is detected by the detecting means and the cylindrical film is transported by the film transporting means.
According to the eighth aspect of the invention, since the X-ray generator is covered with the protective cover in the situation where X-rays are irradiated from the X-ray generator, the leakage of X-rays to the outside of the machine is effectively prevented. can do.

  According to the defective product detection apparatus in the horizontal bag making and filling machine according to the present invention, it is possible to take a countermeasure by detecting defects before performing horizontal sealing and packaging.

It is a schematic side view of the horizontal bag making and filling machine according to the example. It is a principal part schematic plan view of the horizontal bag-making filling machine which concerns on an Example. It is a schematic longitudinal cross-sectional view of the horizontal bag-making filling machine which concerns on an Example. It is explanatory drawing which shows the relationship between the X-ray irradiated from the X-ray generator of the inferior goods detection apparatus which concerns on an Example, an article | item, and a cylindrical film. It is explanatory drawing which shows the relationship between the X-ray irradiated from the X-ray generator of the inferior goods detection apparatus which concerns on another Example, an article | item, and a cylindrical film.

  Next, an example of the defective product detection apparatus in the horizontal bag making and filling machine according to the present invention will be described below with reference to the accompanying drawings.

  1 and 2 show a schematic configuration of a defective product detection apparatus in a horizontal bag making and filling machine as a packaging machine according to an embodiment. The packaging machine removes a belt-like film 12 drawn from a film roll 10. , Bag-making means 14 for polymerizing both ends in the longitudinal direction into a palm shape to form a tubular film 12a, a supply conveyor 18 for supplying articles 16 at predetermined intervals toward the tubular film 12a, and the palm The vertical sealing means 24 for forming the vertical seal portion 26 in the overlapping portion 12b of the cylindrical film 12a superposed in a shape, and the cylindrical film 12a toward the vertical sealing means 24 while sandwiching the overlapping portion 12b of the cylindrical film 12a The film conveying means 22 for conveying the film and the cylindrical film 12a sandwiched between the front and rear positions of the article 16 supplied in the cylindrical film 12a and intersecting the conveying direction of the cylindrical film 12a And a horizontal seal means 32 for applying a horizontal seal in the direction, and the film transport path between the vertical seal means 24 and the horizontal seal means 32 is irradiated with X-rays in a direction crossing the film transport path. An X-ray inspection unit 40 arranged as described above is provided. Then, this X-ray inspection unit 40 is formed by the presence or absence of misalignment of the article 16 supplied to the cylindrical portion 25 in the cylindrical film 12a before the horizontal sealing at predetermined intervals, and the vertical sealing means 24. In addition, the vertical seal portion 26 can be inspected for defective seals. Specifically, in the packaging machine, the belt-like film 12 drawn from the film roll 10 is guided to the bag making means 14 through a plurality of guide rollers, and is formed into a cylindrical shape by the bag making means 14. A supply conveyor 18 for supplying articles 16 at regular intervals is disposed in the tubular film 12a formed by the bag making means 14. In the embodiment, when the belt-like film 12 guided from above the bag making means 14 is formed into a cylindrical shape by the bag making means 14, both ends in the width direction are below the conveyance path of the article 16 (under the article 16. It is configured to polymerize in the shape of a palm. In addition, as the film used for packaging, an aluminum packaging material in which the inside of the packaged product cannot be visually recognized, such as an aluminum vapor deposition film or an aluminum laminate film, is used.

  On the downstream side of the bag making means 14, there is disposed a transport bed 20 on which the article 16 supplied in the tubular film 12a is placed and transported via the film. As shown in FIG. 2, the transfer bed 20 includes mounting portions 20a, 20a, 20b, and 20b disposed on the left and right sides, and a gap S defined between the mounting portions 20a, 20a, 20b, and 20b. From both ends of the film, the film is guided so as to extend downward and is polymerized in the form of a palm. In the present embodiment, the transfer bed 20 is provided with a position adjustment space S3 corresponding to an installation position of an X-ray inspection unit 40 which will be described later, and the first placement is placed upstream from the position adjustment space S3. The parts 20a, 20a are arranged on the left and right, and the second placement parts 20b, 20b are arranged on the left and right sides, and the left and right placement parts 20a, 20a, 20b, 20b are in the tubular film 12a. It is comprised so that the superposition | polymerization part 12b may pass. A film conveying means 22 comprising a pair of feed rollers 22a and 22a rotating while sandwiching the overlapping portion 12b of the film superposed in the shape of a palm under the conveying bed 20 is disposed, and the film conveying means 22 On the downstream side, a vertical sealing means 24 including a pair of seal rollers 24a and 24a for vertically sealing the overlapping portion 12b is disposed. The overlapping portion 12b obtained by performing the vertical sealing by the vertical sealing means 24 to obtain the vertical sealing portion 26 is a standing protruding downward (vertical direction) from the cylindrical portion 25 in which the article 16 of the cylindrical film 12a is accommodated. The cylindrical film 12a is conveyed toward the downstream side with the overlapping portion 12b (vertical seal portion 26) extending downward from the gap S1 of the conveyance bed 20. The film transport means 22 is provided with an encoder attached to a servo motor that rotationally drives the feed rollers 22a, 22a, and a pulse signal output from the encoder is input to the control means 27. And the control means 27 can know the conveyance amount of the cylindrical film 12a based on the pulse signal output from an encoder. Note that one side in the width direction (left-right direction) intersecting the film transport path of the tubular film 12a sent by the film transport means 22 is set as the operation side of the packaging machine, The opposite side is referred to as the back.

  A bending member 30 extending in an oblique direction is disposed at the downstream end of the transfer bed 20, and the overlapping portion 12b (vertical seal portion 26) extending downward from the transfer bed 20 is formed by the cylindrical film 12a. As the sheet is conveyed, the bending member 30 is bent so as to be gradually tilted and guided so as to be tilted along the lower surface of the tubular portion 25.

  As shown in FIG. 1, a horizontal seal provided with a pair of upper and lower sealing bodies 32a and 32a for cutting and cutting the cylindrical film 12a in a direction crossing the conveying direction on the downstream side of the conveying bed 20. Means 32 are provided. The pair of seal bodies 32a, 32a are controlled by a servo motor so that the cylindrical film 12a is sandwiched between the front and back positions of the article 16 and a lateral seal is applied each time the film is conveyed by the length of one package. It has become so. In this way, the tubular film 12a in which the overlapping portion 12b is folded on the lower surface by the bending member 30 is laterally sealed and cut. A carry-in conveyor 34 is disposed on the upstream side of the sandwiching position of the tubular film 12a between the seal bodies 32a and 32a, and a carry-out conveyor 36 is disposed on the downstream side. The opposite end portions of the carry-in conveyor 34 and the carry-out conveyor 36 move away from each other when the pair of seal bodies 32a and 32a approach each other, and allow the lower seal body 32a to pass when it rises. When the pair of seal bodies 32a and 32a are separated from each other, they move so as to be close to each other so that the articles 16 in the tubular film 12a can be smoothly delivered between the conveyors. The package product that has been laterally sealed and cut by the lateral sealing means 32 and separated from the tubular film 12 a is configured to be carried out by the carry-out conveyor 36. The transport upstream end of the carry-in conveyor 34 extends to a position close to the downstream end of the transport bed 20.

  A presser conveyor 38 is disposed above the film conveyance path from the downstream side of the bag making means 14 to the position where the vertical seal means 24 is disposed. The presser conveyor 38 presses the upper surface of the article 16 that is brought into contact with the upper surface of the cylindrical film 12a conveyed on the transfer bed 20 and supplied into the cylindrical film 12a at predetermined intervals in a light contact state. A plurality of sponge-like or brush-like pressing members that run at the same speed as the film conveying speed are provided. As a result, the articles 16 supplied into the tubular film 12a at predetermined intervals can be auxiliary fed without being displaced. The presser conveyor 38 can select whether or not the property of the article 16 and other necessity are required.

  The packaging machine is driven and controlled by the control means 27 by a synchronous drive control signal so as to operate each of the servo motors that rotationally drive various operation mechanisms such as the supply conveyor 18, the film transport means 22, and the lateral seal means 32. The control means 27 is connected to an input / display means comprising a touch panel capable of inputting and displaying data such as operation parameters of various operating mechanisms, operation conditions, various setting conditions, and the like. The control means 27 is connected to an X-ray inspection unit 40 and a control unit for the X-ray inspection unit, which will be described later, and a detection signal from the X-ray inspection unit 40 is input to the control means 27. .

  Between the downstream end of the vertical sealing means 24 and the bending member 30 on the upstream side of the horizontal sealing means 32 (the folding that overlaps the overlapping portion 12b along the cylindrical portion 25 downstream of the vertical sealing means 24) Film conveyance in which the tubular film 12a is conveyed in a state in which the overlapping portion 12b (vertical seal portion 26) extends from the tubular portion 25 in a posture in which the overlapping portion 12b (vertical seal portion 26) stands. X-ray inspection units 40 that irradiate X-rays so as to cross the film conveyance path at right and left sides of the film conveyance path in the section so as to inspect the positional deviation of the article 16 and the defect of the vertical seal portion 26. Has been placed. As shown in FIGS. 2 and 3, the X-ray inspection unit 40 is arranged so that the X-ray generator 42 emits X-rays toward the back side on the front side of the film conveyance path. An X-ray detector 44 is disposed on the back side of the film conveyance path so as to face the surface. An X-ray output unit 42a in the X-ray generator 42 and an X-ray detection unit 44a in the X-ray detector 44 are divided into the first mounting units 20a and 20a and the second mounting units 20b and 20b. Furthermore, they face each other across the gap S2 of the partition body composed of the transport bed 20. Thus, in this embodiment, the X-rays emitted from the X-ray generator 42 are not blocked by the transfer bed 20 until reaching the X-ray detector 44, and the vertical seal is formed from the upper part of the tubular film 12a. The entire height range up to the unit 26 can be detected with high accuracy by the X-ray detector 44.

  As the X-ray generator 42, an X-ray generator that emits soft X-rays that have a low transmission power and can be sufficiently shielded by a resin cover is preferably used. The X-ray generator 42 emits X-rays from the output unit 42a in a direction intersecting the film conveyance path, and the X-rays are irradiated while spreading in a predetermined range in the vertical direction. As shown in FIG. 4, the X-ray irradiation range of the X-ray generator 42 is determined from the passage position of the tubular portion 25 of the tubular film 12 a that is placed and transported on the transport bed 20 and the gap S <b> 1 of the transport bed 20. It is set so as to cover the passage region of the vertical seal portion 26 in the overlapping portion 12b extending downward. In addition, the X-ray generator 42 is applied to the overlapping portion 12b from the boundary position between the cylindrical portion 25 and the overlapping portion 12b in the cylindrical film 12a that is mounted on the mounting surface of the transfer bed 20 and transferred. The output portion 42a is disposed on the extending side of the vertical seal portion 26, and the X-rays irradiated in the horizontal direction from the output portion 42a are overlapped with the article 16 and blocked by the X-ray detector 44. Instead, the entire length of the extended length of the vertical seal portion 26 in a vertically standing state is irradiated.

  In the X-ray detector 44, the detection unit 44a is a line sensor in which a plurality of X-ray detection elements are continuously arranged in a straight line in the vertical direction, and the cylindrical film 12a being conveyed by the film conveying means 22 is used. The amount of X-ray transmitted through the cylindrical portion 25 and the vertical seal portion 26 (overlapping portion 12b) to the detection portion 44a can be detected within a predetermined length range in the vertical direction. As shown in FIG. 4, the amount of X-ray transmitted through the cylindrical part 25 that moves the passing position of the cylindrical part 25 is detected within the range of the X-ray effective detection region L by the X-ray detector 44. A first determination area N1 and a second determination area N2 for detecting the amount of X-rays transmitted through the vertical seal portion 26 that moves through the passing position of the vertical seal portion 26 are provided separately. Specifically, the first determination area N1 is above the placement surface of the transfer bed 20 (the boundary position between the cylindrical portion 25 and the overlapping portion 12b) as a reference position and up to the upper edge of the article 16 The second determination area N2 is set as a detectable range corresponding to the lower edge of the vertical seal portion 26 corresponding to the irradiated X-ray below the reference position. Is set. That is, the X-ray detector 44 is configured to detect the amount of X-ray transmission irradiated to each of the cylindrical portion 25 in the cylindrical film 12a and the formation range of the vertical seal portion 26 in the overlapping portion 12b. Yes.

  The X-ray detector 44 detects the X-ray transmission amount for each detection element of the line sensors arranged in a line. Based on the detection value obtained for each line by the X-ray detector 44, the detected transmission amount in each of the first determination area N1 and the second determination area N2 is allowed in each area. When the threshold value (determination value) preset as the minimum transmission amount falls below, the detection signal is output from the X-ray inspection unit 40 to the control means 27. That is, the control unit of the X-ray inspection unit 40 compares the detection value (detected transmission amount) of the X-ray detector 44 with a threshold value to determine whether or not a detection signal is output. When the determination result in the first determination area N1 is a transmission amount smaller than the threshold, a detection signal is output assuming that the article 16 is present in the tubular film 12a. Further, when the determination result in the second determination area N2 is a permeation amount smaller than the threshold value, a seal failure such as foreign matter mixing into the vertical seal portion 26 or misalignment of the seal fistula or the overlapping portion 12b is recognized. As a result, a detection signal is output. And the control means 27 is the conveyance position of the cylindrical film 12a in which the articles | goods 16 currently supplied to the said cylindrical film 12a are the timings when the detection signal (determination detection signal) in the said 1st determination area N1 was output. It is determined whether the accommodation position is within a predetermined range with respect to the position of the cylindrical film 12a having a length corresponding to one package obtained in the relationship. That is, as the tubular film 12a is conveyed, the article 16 accommodated in the tubular film 12a moves forward, and when the front end of the article 16 crosses the X-ray irradiation position, the X-ray is detected by the X-ray detector 44. The amount of detected transmission decreases. Since the detected transmission amount is smaller than the threshold value, the detection signal indicating the presence of the article 16 is transmitted as a determination result in the first determination area N1, and the rear end of the article 16 is The signal output indicating the detection state continues until it passes through the irradiation region in the X-ray inspection unit 40.

  Here, the transport position of the cylindrical film 12a is determined based on the film transport amount obtained from the pulse signal output from the encoder attached to the servo motor that drives the feed rollers 22a and 22a in the film transport means 22. You can know the position. Thereby, the accommodation position of the article 16 is allowed depending on the position of the cylindrical film 12a from the start end to the end of the film having a length of one package being conveyed and the input timing of the detection signal from the first determination area N1. Whether or not the value exceeds the value, that is, whether the position where the article 16 is accommodated with respect to the cylindrical film 12a having a predetermined length for one package can be determined. When the determination result exceeds the allowable range, a position defect signal (defective signal) of the article 16 is output. Specifically, when the front end of the article 16 is detected (when the detection signal from the first determination area N1 changes from the non-output state to the output state), the relationship with the transport position of the tubular film 12a. Thus, it is determined whether or not the distance from the beginning of the film having a length of one package in the transported state to the front end of the article 16 is within an allowable range. An article signal (defect signal) is transmitted assuming that the article 16 is bitten by interfering with the seal bodies 32a and 32a of the sealing means 32, and if the article 16 is longer than the allowable value, the rear of the article 16 is placed on the seal. An abnormal signal (defective signal) is transmitted on the assumption that the article 16 is bitten by interfering with the bodies 32a and 32a. And this determination is repeatedly implemented whenever the film of the length for one package is conveyed. That is, the control means 27 is obtained from the film conveyance amount of the length of one package conveyed by the film conveyance means 22 when a failure is determined based on the detection result (detection signal) of the X-ray inspection unit 40. It is comprised so that a defect signal can be output for every packaging unit. In addition, you may make it obtain a film conveyance amount from the pulse signal transmitted from the pulse transmission means which transmits a pulse signal, when the cylindrical film 12a is conveyed.

  In this way, it is possible to simultaneously detect a position defect of the article 16 that occurs in the tubular portion 25 in the tubular film 12a and a defect that occurs in the vertical seal portion 26 in the tubular film 12a. In the first determination area N1 and the second determination area N2, the type of defect that occurs (position displacement of the article 16, contamination of foreign matter in the vertical seal portion 26, seal wrinkles, overlapping displacement of the overlapping portion 12b). Since it is different, it is most preferable to individually set a threshold value for each determination area N1, N2 according to an appropriate determination type in order to improve the determination accuracy. In the embodiment, an appropriate threshold value is individually set for each determination area N1, N2. It is stipulated in. Note that the same threshold value can be used in each of the determination areas N1 and N2 as long as a defect occurring in each of the determination areas N1 and N2 can be appropriately detected.

  The X-ray generator 42 and the X-ray detector 44 are configured such that the height position (vertical position) can be adjusted by adjusting means. Further, the X-ray generator 42 and the X-ray detector 44 are configured such that their positions can be adjusted left and right (in the approach and separation directions with respect to the film transport path) by adjusting means. As shown in FIG. 2, the X-ray generator 42 and the X-ray detector 44 are positioned in the adjustment space S <b> 3 provided in the transfer bed 20 and can be adjusted in position without interfering with the transfer bed 20. It has become.

  In the control means 27, the defective portion of the cylindrical film 12a determined as having the positional deviation of the article 16 in the first determination area N1 by the amount of film transport obtained from the encoder reaches the horizontal sealing means 32. Timing can be obtained. And the control means 27 outputs the said defect signal according to the time when the defect location of the cylindrical film 12a is conveyed to the horizontal sealing means 32, when it determines defect by the detection result of the said X-ray inspection unit 40, The operation of the horizontal sealing means 32 is temporarily stopped at the open position before the sealing bodies 32a and 32a come into contact with the cylindrical film 12a by the closing operation, and one package of the cylindrical film 12a including the defective portion is the horizontal sealing means 32. The control means 27 controls the operation of the lateral seal means 32 so that the seal operation by the seal bodies 32a, 32a is suspended (stopped) until it passes. Note that the suspension of the lateral sealing operation of the lateral sealing means 32 is an operation in which the sealing bodies 32a and 32a are closed and the tubular film 12a is clamped corresponding to the end portion of the article 16 that is expected to be caught in the detection result. This is the previous timing, and by this pause, a package that is continuous for two or more package lengths without being horizontally sealed and cut is obtained. And the defective packaging product which became the packaging length more than twice including the defective location is discharged | emitted out of the system in the conveyance process downstream. The suspension of the lateral sealing operation by the seal bodies 32a, 32a is caused by a failure point determined as a seal failure in the determination result in the second determination area N2 (a seal failure is detected by comparing the detected value with a threshold value). May be carried out corresponding to By doing so, it is preferable that the defective package is discharged longer than the non-defective product and can be distinguished from the good product at a glance when it is excluded as a defective product.

  When the defect is determined, the control means 27 determines when the tubular film 12a having a length corresponding to one package where the defect exists similarly reaches the sealing position by the horizontal sealing means 32 (the seal bodies 32a and 32a are The operation of all the operating mechanisms of the packaging machine may be stopped and the packaging operation may be stopped in accordance with the timing before contacting the tubular film 12a. In addition, when the control unit 27 determines a failure, it may be possible to select and set in advance which operation control is to be performed, that is, whether the horizontal sealing operation by the horizontal sealing unit 32 is stopped or the packaging operation is stopped. Also, when a failure is determined, it is possible to notify the operator of the occurrence of a failure by sounding an alarm buzzer, turning on an alarm lamp, or displaying the type of failure on the operation screen of the input / display means.

  Here, the control means 27 stores the detection value obtained from the X-ray detection unit 40 according to the defect determination, and based on the detection value and the film conveyance amount obtained from the encoder in the film conveyance means 22, The cylindrical film 12a having a length corresponding to one package is subjected to image processing so as to be expressed in light and shade (shading) according to the magnitude of the detected value, and displayed as an X-ray transmission image on the input / display unit for each length corresponding to one package. You may make it do. Thereby, it is preferable because the operator can visually know the defective portion from the image. Then, by configuring the control unit 27 to store the image for each film having the weight of one package determined to be defective in association with the production number of the package, It can be used to eliminate defects or used as a production record. Further, the stored X-ray transmission image may be displayed on the input / display means or a separately installed monitor for defective screen display during the packaging operation, or as a defective package product at the time of defect determination. You may make it display on an input and a display means, a monitor for defective screen displays, etc. at the time of discharging out of the system after packaging.

  From the position upstream of the position where the presser conveyor 38 is disposed to the position downstream of the position where the bending member 30 is disposed (folding formation position of the overlapping portion 12b) (from the position where a vertical seal is applied to the overlapping portion 12b) A protective cover 46 made of a transparent resin is provided so as to be openable and closable so as to close the upper space between the overlapping portion 12b and the folding formation position. The protective cover 46 is a lower side that closes the upper space by being supported on the front side of the back wall 48 disposed on the back side of the film transport path so that the front side can swing up and down with the end on the back side as a fulcrum. Between the closed position and the upper open position that opens the upper space. As shown in FIG. 3, the protective cover 46 has a ceiling wall 46a extending from the rear wall 48 to the front side above the transfer bed 20 in the closed position, and extends from the front end of the ceiling wall 46a to the front side of the transfer bed 20. The X-ray inspection unit 40 is housed inside the protective cover 46 in the closed position of the protective cover 46, and the X-rays emitted from the X-ray generator 42 are external to the protective cover 46. To prevent leakage. Further, the back side of the X-ray inspection unit 40 is configured to be shielded by the back wall 48 regardless of whether the protective cover 46 is in the closed position or the open position. Further, a front wall that covers the front side of the space below the transfer bed 20 is provided on the front side of the transfer bed 20, and the lower end of the front wall 46b is on the front side of the front wall when the protective cover 46 is closed. It is supposed to overlap.

  Detection means 50 for detecting the open / close state (open / close) of the protective cover 46 is provided. The detection signal of the detection means 50 is input to the control means 27. The control means 27 detects the X-ray from the X-ray generator 42 when the operation signal for the packaging operation is operated and the operation signal is ON with the protective cover 46 closed in the detection result of the detection means 50. The signal output to the X-ray inspection unit 40 is controlled so as to be irradiated. That is, the X-ray irradiation from the X-ray generator 42 is performed during a packaging operation in which the closing of the protective cover 46 is detected by the detecting means 50 and the cylindrical film 12a is transported by the film transporting means 22. The X-ray generator 42 continuously emits X-rays during the operation of the packaging machine. Further, when the operation of the packaging machine is stopped and the protective cover 46 is opened and the detection by the detection means 50 does not detect the closure of the protective cover 46, X-rays from the X-ray generator 42 are irradiated. Never happen.

  Next, the operation of the embodiment will be described. When the operation signal of the packaging operation is turned ON with the protective cover 46 in the closed position and the operation signal is turned ON, various operation mechanisms are driven to perform the packaging operation (conveying the cylindrical film 12a by the film conveying means 22). Is started. Further, since the detecting means 50 detects the closing of the protective cover 46, the X-ray generator 42 irradiates X-rays toward the back side with the start of the packaging operation. X-rays irradiated onto the tubular film 12a being conveyed through the film conveyance path are detected by the X-ray detector 44, and when the transmission amount of the X-rays is less than a threshold value, the control means 27 A detection signal is output. And the control means 27 is the timing when the detection signal in the said 1st determination area N1 was output, and the accommodation position of the articles | goods 16 is in the predetermined range with respect to the position of the cylindrical film 12a of the length for one package. It is determined whether or not a failure is detected, and if a failure is determined, a position failure signal (failure signal) is output. Further, when the detection signal in the second determination area N2 is output (when it is determined that the seal is defective based on the detection result obtained by comparing the detection value with the threshold value), the control unit 27 detects foreign matter on the vertical seal portion 26. A seal failure signal (failure signal) is output on the assumption that a seal failure such as mixing, seal flaws, or overlapping of the overlapping portion 12b is recognized. Then, the control means 27 performs the lateral sealing operation of the lateral sealing means 32 in accordance with the time when the defective film 12a having a length corresponding to one package including the defective portion reaches the position where the lateral sealing means 32 is laterally sealed. The horizontal sealing operation is paused until the defective film 12a passes through the horizontal sealing means 32. After the defective film 12a passes through the horizontal sealing means 32, the control means 27 restarts the sealing operation of the horizontal sealing means 32. Due to the suspension of the lateral sealing operation, a continuous package of two or more packaging lengths is obtained without being laterally sealed or cut, and defective packaging products having a packaging length more than twice including the defective part are transported downstream. Is discharged outside the system. A defective package including a defective portion is different in length from a non-defective product, so that the distinction from the non-defective product can be distinguished at a glance.

  Since the X-ray inspection unit 40 is arranged on the upstream side of the horizontal sealing means 32, it is possible to determine a defect before the tubular film 12a reaches the position where the cylindrical film 12a is horizontally sealed (during packaging), and the defective part is a packaged product. Measures can be taken before Further, since the position shift of the article 16 can be detected before the lateral seal, the lateral seal operation can be stopped, so that the article 16 displaced in the seal bodies 32a and 32a can be caught and damaged. Can be prevented. Further, since the misaligned article 16 is not sandwiched between the seal bodies 32a and 32a, mechanical damage to the seal bodies 32a and 32a and others can be prevented.

  The overlapping part 12b (vertical seal part 26) extends from the gap S1 between the left and right mounting parts 20a, 20a, 20b, 20b in a posture in which the overlapping part 12b stands downward from the cylindrical part 25 and is guided to the cylindrical film 12a. Since the X-ray inspection unit 40 is arranged in the film transport section, various seal failures of the vertical seal portion 26 can be detected stably and accurately. In particular, by arranging the X-ray inspection unit 40 between the vertical seal means 24 and the bending member 30, the vertical seal portion 26 which is sealed by the vertical seal means 24 and guided in a substantially straight posture is orthogonal. Further, since the inspection is performed by the irradiation of the crossing X-ray, the detection accuracy of the seal failure can be further increased. As shown in FIG. 4, the output portion 42a of the X-ray generator 42 is superposed from the boundary position between the cylindrical portion 25 and the overlapping portion 12b of the cylindrical film 12a that is placed on the transfer bed 20 and transferred. Since it is located on the extending side of the vertical seal portion 26 applied to the portion 12b, it is irradiated from the output portion 42a across the conveyance path of the tubular film 12a for detection in the second determination area N2. The entire vertical seal portion 26 can be inspected by the amount of transmission that reaches the X-ray detector 44 without being blocked by the article 16 accommodated in the cylindrical portion 25. Furthermore, the control means 27 detects a seal defect corresponding to the first determination area N1 for detecting the displacement of the article 16 corresponding to the passage position of the cylindrical portion 25 and the passage position of the vertical seal portion 26. Since the determination is made in comparison with different threshold values (determination values) separately for the second determination area N2, the determination accuracy in each of the determination areas N1 and N2 can be improved and erroneous determination can be prevented. Moreover, since the cylindrical part 25 and the vertical seal part 26 in the cylindrical film 12a inspected by the X-ray inspection unit 40 are partitioned vertically by the transport bed 20, the cylindrical part 25 is detected by the vertical seal part 26. The vertical seal portion 26 does not enter the area defined as the area, and the vertical seal portion 26 does not enter the area defined as the detection area of the cylindrical portion 25. It is possible to satisfactorily detect 26 seal failures.

  Since the X-ray is emitted from the X-ray generator 42 only when the protective cover 46 is covered with the protective cover 46 in the closed position, the X-ray is exposed to the outside of the machine during operation of the packaging machine. There is no leakage. Moreover, since the output part 42a of the X-ray generator 42 is arranged so that X-rays are emitted from the front toward the back, the operation is performed on the front side of the packaging machine even when the protective cover 46 is opened. X-rays are not accidentally irradiated toward the worker. In the embodiment, the rear wall 48 on the back side of the X-ray inspection unit 40 (on the side irradiated with X-rays from the X-ray generator 42) regardless of whether the protective cover 46 is in the closed position or the open position. Therefore, X-rays will not leak out to the outside. In the embodiment, the space on the near side of the X-ray inspection unit 40 below the transfer bed 20 is shielded by the front wall, so that the operator's body does not enter the space by mistake.

  Since the X-ray generator 42 and the X-ray detector 44 are configured to be vertically adjustable (up and down), the X-ray generator 42 and the X-ray detector 44 cross the conveyance path of the tubular film 12a from the output portion 42a of the X-ray generator 42. Thus, the X-rays irradiated can be adjusted to a height position where the entire amount of the vertical seal portion 26 can be detected and detected without being blocked by the article 16. Further, the X-ray generator 42 and the X-ray detector 44 are configured to be adjustable in position in the left and right direction (left and right) of the conveyance path of the tubular film 12a. The spread X-rays can be adjusted to a position where the entire amount of transmitted light can be detected by irradiating the entire article 16 and the vertical seal portion 26. That is, the height of the X-ray generator 42 and the X-ray detector 44 and the distance from the tubular film 12a are set in accordance with the articles 16 having different heights and shapes and the types having different extension lengths of the vertical seal portion 26. Can be adjusted flexibly to a wide variety of packaging.

(About another example)
FIG. 5 shows a configuration in which, when the belt-like film 12 is formed into a cylindrical shape by the bag making means 14, both end portions in the width direction are superposed in the shape of a palm above the conveyance path of the article 16 (upper side surface of the article 16) Another embodiment in which a defective product detection device is adopted in the horizontal bag making and filling machine is shown. In this alternative embodiment, only the parts different from the above-described embodiment will be described, and the same members and parts as those described above will be denoted by the same reference numerals and detailed description thereof will be omitted.

  In another embodiment, the cylindrical film 12 a in which the overlapping portion 12 b (vertical seal portion 26) extends in a posture standing upward (vertical direction) from the cylindrical portion 25, the cylindrical portion 25 is provided on the transport conveyor 52. It is conveyed downstream in the state of being placed. A partition plate 54 is provided as a partition body that is spaced above the transport conveyor 52 to allow passage of the overlapping portion 12b and to partition the vertical seal portion 26 and the cylindrical portion 25 up and down. The partition plate 54 functions to prevent heat from the vertical sealing means 24 that performs vertical sealing on the overlapping portion 12b from being transmitted to the cylindrical portion 25 and to prevent dust and the like from falling downward. The partition plate 54 is divided into an upstream side and a downstream side between the X-ray generator 42 and the X-ray detection unit 44, and a gap is defined in the same manner as the transfer bed 20. The X-ray output unit 42a of the X-ray generator 42 and the X-ray detection unit 44a of the X-ray detector 44 face each other, and the X-rays emitted from the X-ray generator 42 detect X-rays. It is not obstructed by the partition plate 54 before reaching the container 44.

  In another embodiment, the X-ray generator 42 is applied to the overlapping portion 12b from the boundary position between the cylindrical portion 25 and the overlapping portion 12b in the cylindrical film 12a that is placed on the transfer conveyor 52 and transferred. The lower side that detects the amount of X-rays transmitted through the cylindrical part 25 that is installed so that the output part 42a is positioned on the extending side of the vertical seal part 26 and moves through the passing position of the cylindrical part 25 The first determination area N1 and the upper second determination area N2 for detecting the transmission amount of X-rays transmitted through the vertical seal portion 26 that moves through the passing position of the vertical seal portion 26 are provided separately. Yes. That is, in another embodiment, the same effect as the above embodiment is obtained. In another embodiment, a transfer bed can be used instead of the transfer conveyor 52.

(Change example)
The present invention is not limited to the configuration of each example illustrated above, and various embodiments can be adopted within the scope of the gist of the present invention. For example, the following modifications are also possible. It can be implemented.
(1) As shown in the embodiment, the partition body is not limited to the one that is separately formed and installed upstream and downstream of the X-ray inspection unit 40, and is integrally formed. Also good. That is, the extension part (overlapping part 12b) extending from the cylindrical part 25 obtains a seal part by heating the part extending beyond the partition, so that the seal failure of the vertical seal part 26 is poor. The determination area may be obtained by determining a range excluding the partitioning position as the second determination area N2 and obtaining a detection result. Further, the transport bed may be constituted by a support plate or the like laid under the transport belt.
(2) The vertical sealing means 24 is not limited to the sealing method using a rotary roll sealer as shown in the embodiment. For example, at least other overlapping portions such as a sealing direction in which the overlapping portion 12b heated by passing the overlapping portion 12b through a gap between a pair of seal bars is sandwiched by a pressure roller, or a sealing method in which the overlapping portion 12b is sandwiched by a heating belt. Various sealing methods that can make 12b a palm shape can be employed.
(3) As the horizontal sealing means 32, a box motion type, a rotary type, or various sealing methods that can be sealed by opposing movement of the sealing body can be selectively employed.
(4) In the horizontal sealing means 32, the conveyors 34, 36 are illustrated as being installed before and after the conveying direction across the horizontal sealing position. However, the conveyors 34, 36 are installed in accordance with the adoption of the box motion sealer. What is necessary is just to be a thing, and the necessity of installation can be selected as needed, such as the property of the article 16.
(5) The defect determination based on the detection result in the X-ray inspection unit 40 can be performed by the control unit of the X-ray inspection unit 40. For example, based on the detection result in the first determination area N1 and the film conveyance amount obtained from the encoder, the control unit of the X-ray inspection unit 40 stores the article 16 in the tubular film 12a having a length corresponding to one package. It is possible to adopt a configuration in which the control means 27 controls the operation of the horizontal sealing means 32 and the packaging machine on the basis of a failure signal output from the X-ray inspection unit 40.
(6) Based on the result of comparing and determining the X-ray transmission amount detected in the second determination area N2 and the threshold value, the control unit 27 of the packaging machine can determine whether there is a seal failure in the vertical seal portion 26.
(7) The X-ray transmission amount (detection value) detected in each determination area N1, N2 is compared with a threshold value (determination value) by the control means 27 of the packaging machine, and the positional deviation of the article 16 and the vertical seal portion 26 A configuration for detecting a sealing failure may be employed. That is, based on the detection value in the X-ray inspection unit 40, the control means 27 can determine whether the article 16 is misaligned and the seal failure of the vertical seal portion 26 is defective.

12a Cylindrical film (defective film), 12b Superposition part, 16 Article 20 Transport bed (partition body), 22 Film transport means, 24 Vertical seal means 25 Cylindrical part, 26 Vertical seal part, 30 Bending member, 32 Horizontal seal Means 40 X-ray inspection unit, 42 X-ray generator, 42a output part, 44 X-ray detector 46 Protective cover, 50 detection means, 54 Partition plate (partition body)
N1 first judgment area, N2 second judgment area

In the invention according to claim 5, wherein the detection failure due to the X-ray inspection unit, the amount of transmitted X-rays at different determination area between the tubular portion and the vertical sealing portion, and the kite as can be detected by different determination value It is characterized by.
According to the invention of claim 5, since the determination area is divided into the cylindrical part and the vertical seal part, it is possible to set an appropriate determination value for each part to increase the detection accuracy of the defect and to make an erroneous determination. Can prevent.

As the X-ray generator 42, an X-ray generator that emits soft X-rays that have a low transmission power and can be sufficiently shielded by a resin cover is preferably used. The X-ray generator 42 emits X-rays from the output unit 42a in a direction intersecting the film conveyance path, and the X-rays are irradiated while spreading in a predetermined range in the vertical direction. As shown in FIG. 4, the X-ray irradiation range of the X-ray generator 42 is determined from the passage position of the tubular portion 25 of the tubular film 12 a that is placed and transported on the transport bed 20 and the gap S <b> 1 of the transport bed 20. It is set so as to cover the passage area of the vertical seal portion 26 in the overlapping portion 12b extending downward. In addition, the X-ray generator 42 is applied to the overlapping portion 12b from the boundary position between the cylindrical portion 25 and the overlapping portion 12b in the cylindrical film 12a that is mounted on the mounting surface of the transfer bed 20 and transferred. The output portion 42a is disposed on the extending side of the vertical seal portion 26, and the X-rays irradiated in the horizontal direction from the output portion 42a are overlapped with the article 16 and blocked by the X-ray detector 44. Instead, the entire length of the extended length of the vertical seal portion 26 in a vertically standing state is irradiated.

Claims (8)

A polymerization section (12b) that extends from a cylindrical section (25) in which articles (16) are accommodated at predetermined intervals inside a cylindrical film (12a) transported by a film transport means (22) and superposes in a palm-like manner. )), And the overlapping portion (12b) is folded along the tubular portion (25), and the tubular film (12) is provided at the front and back positions of the article (16) supplied to the tubular film (12a). In a horizontal bag making and filling machine that performs horizontal sealing by sandwiching 12a) with horizontal sealing means (32),
Film transport in a film transport section in which the overlapping portion (12b) extends from the tubular portion (25) in a vertical position and the tubular film (12a) is transported to the lateral seal means (32). An X-ray inspection unit (40) for continuously irradiating X-rays laterally to the cylindrical film (12a) being conveyed is provided so as to cross the road,
The X-ray inspection unit (40) irradiates each of the cylindrical part (25) in the cylindrical film (12a) and the formation range of the vertical seal part (26) in the overlapping part (12b). An X-ray generator (42) and an X-ray detector (44) are arranged oppositely on the left and right sides of the film conveyance path so that the amount of ray transmission can be detected,
In the detected X-ray transmission amount, the positional deviation of the article (16) supplied to the cylindrical film (12a) is detected from the X-ray transmission amount of the cylindrical portion (25), and the vertical seal portion (26 ) Is detected from the X-ray transmission amount of the vertical seal portion (26), and when the failure is determined by the detection result, the length of one package transported by the film transport means (22) A defective product detection apparatus for a horizontal bag making and filling machine, wherein a defective signal can be output for each packaging unit obtained from a film transport amount.   The said X-ray generator (42) has arrange | positioned the output part (42a) so that X-ray | X_line may be irradiated toward the back | inner side from the near side of the said film conveyance path, The horizontal type manufacturing of Claim 1 characterized by the above-mentioned. Defective product detection device for bag filling machine.   When a defect is determined based on the detection result, the film transport means (22) until the defective film (12a) having a length corresponding to one package including the defective portion is subjected to a horizontal seal by the horizontal seal means (32). ), The cylindrical body (12a) before the cylindrical film (12a) is sandwiched between the sealing bodies (32a, 32a) in the lateral sealing means (32). Stop at a position separated from the film (12a), and stop until the defective film (12a) passes, or control the operation of the sealing body (32a, 32a), or each of the operating mechanisms of the packaging machine 3. The defective product detection apparatus for a horizontal bag making and filling machine according to claim 1, wherein the operation is controlled by either operation control for stopping the packaging operation for stopping all operations.   The X-ray inspection unit (40) reaches the arrangement position of the bending member (30) that folds the overlapping portion (12b) along the cylindrical portion (25) downstream from the vertical sealing means (24). The defective product detection apparatus in the horizontal bag making and filling machine according to any one of claims 1 to 3, wherein the defective product detection apparatus is disposed between the first and second processes.   The defect detection by the X-ray inspection unit (40) detects the X-ray transmission amount in different judgment areas (N1, N2) in the cylindrical part (25) and the vertical seal part (26) by different judgment values. The defective product detection apparatus in the horizontal bag making and filling machine according to any one of claims 1 to 4, wherein the defective product detection apparatus is configured to be able to do so.   The film transport section includes a partition body (20, 54) that allows passage of the overlapping portion (12b) and partitions the vertical seal portion (26) and the cylindrical portion (25) vertically. The defective product detection apparatus in the horizontal bag making and filling machine according to any one of claims 1 to 5.   7. The X-ray generator (42) and the X-ray detector (44) are configured to be position-adjustable up and down and to the left and right of the film transport path, according to claim 1. Defective product detection device for horizontal bag making and filling machine. Covering the upper space from the position where the overlapping part (12b) is vertically sealed to the folding formation position where the overlapping part (12b) is folded along the cylindrical part (25) is closable, X A protective cover (46) made of a transparent resin that can be opened and closed between a closed position that accommodates the line inspection unit (40) and an open position that opens upward, and detection means (50) that detects opening and closing of the protective cover (46) And
When the closing of the protective cover (46) is detected by the detection means (50) and the cylindrical film (12a) is transported by the film transport means (22), the X-ray generator (42) The defective product detection apparatus in the horizontal bag making and filling machine according to any one of claims 1 to 7, wherein X-ray irradiation is performed.

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