JP2016002737A - Bag making machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To immediately detect, in the event of an abnormality in which heat seal cannot be performed normally even when the temperatures of heat seal parts for temporarily heating body materials are normal, the abnormality.SOLUTION: A bag making machine 100 heats the same portions of first and second body materials 61, 62, placed one above the other, more than one time, thereby heat-sealing the first and second body materials 61, 62, and forming a bag. The bag making machine 100 comprises: an intermittent mechanism 22 that intermittently feeds the first and second body materials 61, 62 in a predetermined direction; a plurality of heat seal parts 30 that heat seals the first and second body materials 61, 62 by heating at least one of the first and second body materials 61, 62 placed one above the other; and a heat dissipation measurement part 50 that measures the temperature of the surface of a portion of the first or second body material 61, 62, which is heated by the heat seal parts 30, without touching the surface.

Description

  In the present invention, the first body and the second body are heat-pressed a plurality of times in the first body and the second body in a state where the first body and the second body are overlaid. The present invention relates to a bag making machine for manufacturing bags by heat-sealing materials.

  Conventionally, a feeding mechanism in which a body made of a film or the like is stacked in two layers and sent in the length direction thereof, and a heat seal part that heat-seals the body sent by the feeding mechanism in this way by heat pressing; Is known (see, for example, Patent Documents 1 and 2). In such a bag making machine, the heat plate of the heat seal part is heated to a constant temperature, and the heat sealant heats the fuselage to melt the sealant of the fuselage. The torso will be heat sealed.

  Moreover, when manufacturing what is called a stand bag using a bottom material, after the bottom material is pinched | interposed between the trunk materials, the quadruple trunk material is heat-sealed. When manufacturing such a stand bag, so-called point sealing is also performed, and the boundary portion of the overlap between the two-layer body material and the bottom material is heat-sealed, that is, the film is doubled with the doubled film. The boundary portion of the film is heat sealed.

JP 2009-083396 A JP 2008-036922 A

  Conventionally, even when the temperature of the heat plate of the heat seal part is a normal temperature, an abnormality in which the heat seal cannot be normally performed may occur. Possible reasons for such an abnormality are that foreign matter such as these fragments enter between the body and the bottom material, resulting in an increase in the heat capacity of the portion to be heated, It can be mentioned that the heat plate of the heat seal part contacts the body while inclining by entering between the material and the bottom material, and as a result, the pressure at the time of pressing is released.

  The present invention has been made in view of such a point, and even when an abnormality has occurred in which heat sealing cannot be performed normally (even if the temperature of the heat seal part that heats the body is normal) Provided is a bag making machine capable of quickly detecting the abnormality.

The bag making machine according to the present invention is:
In the state where the first body and the second body are overlapped, the same portion of the first body and the second body is heated and pressed a plurality of times, thereby the first body and the second body. A bag making machine that heat seals the material to produce a bag,
An intermittent feed mechanism for intermittently feeding the first body and the second body along a predetermined direction;
In a state where the first body and the second body are overlapped, at least one of the first body and the second body is heated and pressed, so that the first body and the second body are heated. A plurality of heat seal portions for heat sealing the material;
Of the first body or the second body, a heat dissipation measurement unit that measures the surface temperature of the portion heated and pressed by the heat seal unit in a non-contact manner,
Is provided.

In the bag making machine according to the present invention,
At least one of the plurality of heat seal portions has a pair of hot plates,
Each of the hot plates constituting the pair of hot plates may be made of a metal material.

In the bag making machine according to the present invention,
The intermittent feed mechanism is sandwiched between the first body and the second body and intermittently feeds the bottom material constituting the bottom of the bag to be manufactured,
The plurality of heat seal portions include a portion where the bottom material overlaps the first body material and the second body material, and a portion where the bottom material does not overlap the first body material and the second body material. A point seal portion for heat-pressing and heat-sealing a portion on the boundary line may be included.

In the bag making machine according to the present invention,
The heat dissipation measurement unit may include a first heat dissipation measurement unit that measures a surface temperature of a portion heated and pressed by the point seal unit in a non-contact manner.

In the bag making machine according to the present invention,
The plurality of heat seal portions may include a bottom seal portion for heat-pressing and heat-sealing a portion corresponding to the bottom of the manufactured bag.

In the bag making machine according to the present invention,
The heat dissipation measurement unit may include a second heat dissipation measurement unit that measures the surface temperature of the portion heated and pressed by the bottom seal portion in a non-contact manner.

In the bag making machine according to the present invention,
The bottom seal portion heat-presses the portion corresponding to the bottom of the manufactured bag so that the height of the portion heated and pressed by the bottom seal portion decreases from the edge in the width direction of the manufactured bag toward the center. And
The second heat radiation measurement unit may measure the surface temperatures of at least two locations where the heights of the portions heated by the bottom seal portion are different from each other in a non-contact manner.

In the bag making machine according to the present invention,
The second heat radiation measuring unit may measure at least the surface temperature of the portion where the height of the portion heated and pressed by the bottom seal portion is maximized and the portion where the height is minimized in a non-contact manner.

In the bag making machine according to the present invention,
The plurality of heat seal portions may include a side seal portion for heat-pressing and heat-sealing a portion corresponding to an edge in the width direction of the manufactured bag.

In the bag making machine according to the present invention,
The heat dissipation measurement unit may include a third heat dissipation measurement unit that measures a surface temperature of a portion heated and pressed by the side seal portion in a non-contact manner.

In the bag making machine according to the present invention,
The third heat dissipation measurement unit may measure the surface temperature in a non-contact manner at a plurality of locations in the portion heated by the side seal portion.

  According to the present invention, the heat dissipation measurement unit measures the surface temperature of the portion of the first body or the second body that has been hot-pressed by the heat seal unit in a non-contact manner. For this reason, the part heat-pressed by the heat seal part can be detected at any time, and the heat seal is normal (even if the temperature of the heat seal part heating the first body or the second body is normal). When an abnormality that cannot be performed in a short time occurs, the abnormality can be detected immediately.

FIG. 1 is a schematic side view showing a configuration of a bag making machine according to an embodiment of the present invention. FIG. 2 is a schematic plan view showing a part of the bag making machine shown in FIG. FIG. 3 is a functional block diagram for explaining a control mode of the bag making machine according to the embodiment of the present invention. FIG. 4 is a view for explaining an aspect of heat-pressing at the bottom seal portion of the bag making machine according to the embodiment of the present invention, and is a schematic plane showing only one bag in the height direction of the bag to be manufactured. FIG. FIG. 5 is a diagram for explaining a mode in which heat pressing is performed at the side seal portion and the point seal portion of the bag making machine according to the embodiment of the present invention, and only one bag in the height direction of the manufactured bag. It is the shown schematic plan view. FIG. 6 is a graph for explaining the relationship between the temperature of the hot plate of the point seal portion of the bag making machine according to the embodiment of the present invention and the surface temperature of the heated and pressed portion. FIG. 7A is a schematic longitudinal sectional view showing a case in which a foreign object is sandwiched between measurement points of the second heat radiation measurement unit, and FIG. 7B is a measurement point of the second heat radiation measurement unit. It is the schematic longitudinal cross-sectional view which showed the case where the case where a foreign material was pinched | interposed in places other than is shown. FIG. 8 is a graph for explaining the relationship between the position of the foreign matter and the surface temperature of the portion heated and pressed by the bottom seal portion. FIG. 9 is a schematic plan view for explaining the shape of the bottom material used in the embodiment of the present invention and the hot press location by the point seal portion. FIG. 10 is a view for explaining a mode in which heat pressing is performed at the side seal portion and the point seal portion of the bag making machine according to the modification of the embodiment of the present invention, and one bag in the height direction of the manufactured bag. It is the schematic plan view which showed only the part.

Embodiment << Configuration >>
Embodiments of a bag making machine according to the present invention will be described below with reference to the drawings. Here, FIG. 1 to FIG. 10 are diagrams for explaining an embodiment of the present invention.

  The bag making machine of the present embodiment heats the same part of the first body 61 and the second body 62 a plurality of times in a state where the first body 61 and the second body 62 made of film are overlapped. By pressing, the first body 61 and the second body 62 are heat-sealed to produce a bag such as a three-sided bag or a stand bag (that is, a bag having a bottom material 63 that can stand on its own). Is for. In the present embodiment, in FIG. 1, the upper body material conveyed in the upper part is referred to as a first body material 61, and the lower material material conveyed in the lower part is referred to as a second body material 62.

  As shown in FIG. 1, the bag making machine 100 according to the present embodiment supports an original fabric 60 in a rotatable manner, and continuously feeds the original fabric 60 from the original fabric supply unit 10. A plurality of guide rolls 11 that appropriately guide the raw fabric 60 that has been fed out, a leather blade 25 that cuts the raw fabric 60 substantially at the center to generate a first body 61 and a second body 62, and a leather blade 25. And a plurality of guide rolls 12 for guiding each of the first body 61 and the second body 62 generated by cutting the raw fabric 60. In addition, one reason for cutting the original fabric 60 at substantially the center is that the design is printed only on one side of the original fabric 60, and the design is arranged on the front and rear surfaces of the bag to be manufactured. This is because the original fabric 60 needs to be cut and pasted up and down. In addition, the guide rolls 11 and 12 shown by FIG.1 and FIG.2 are some, and actually more guide rolls 11 and 12 are arrange | positioned.

  The bag making machine 100 of the present embodiment includes a feed mechanism 20 that feeds the raw fabric 60, the first body 61, and the second body 62 along a predetermined direction (see FIG. 3). As shown in FIG. 3, the feed mechanism 20 includes a continuous feed mechanism 21 that continuously feeds the original fabric 60, an original fabric 60, and a first body 61 and a second body generated from the original fabric 60. It has an intermittent feed mechanism 22 that sends each of 62 by intermittent feed. The intermittent feed mechanism 22 includes an accumulator 22a (see FIG. 1). The raw fabric 60 is continuously fed to the accumulator 22a by the continuous feed mechanism 21, and the intermittent feed mechanism 22 including the accumulator 22a is provided after the accumulator 22a. Accordingly, the raw fabric 60, the first body 61, and the second body 62 are intermittently fed.

  As shown in FIG. 1, the bag making machine 100 according to the present embodiment supplies a bottom material 63 that is sandwiched between a first body 61 and a second body 62 and constitutes the bottom of a manufactured bag. A pair of bottom tape rolls 15 is provided. The bottom material 63 intermittently fed from the bottom tape roll 15 by the intermittent feeding mechanism 22 is folded in half by the triangular plate 16 and further intermittently fed to the downstream side. In the present embodiment, the bottom material 63 is also made of a film. This bottom material 63 will be used when producing a stand bag. Incidentally, the bottom material 63 has a notch as shown in FIG. Further, as shown in FIG. 9, a portion where the bottom material 63 overlaps the first body 61 and the second body 62, and a portion where the bottom material 63 does not overlap the first body 61 and the second body 62, Will be heated and pressed by the point seal portion 33 described later on the boundary line.

  In FIG. 1, only the bottom tape roll 15 on the near side of the paper is shown, but actually, in addition to the bottom tape roll 15 shown in FIG. 1, it is positioned in the depth direction of the paper of FIG. A bottom tape roll is provided.

  As shown in FIG. 3, the bag making machine 100 of the present embodiment has at least one of the first body 61 and the second body 62 in a state where the first body 61 and the second body 62 are overlapped. Among the heat seal portions 30 that heat-seal the first body 61 and the second body 62 by heating one side, and the heat seal portion among the first body 61 and / or the second body 62. And a heat radiation measuring unit 50 that measures the surface temperature of the part heated at 30 in a non-contact manner. Although various things can be employ | adopted as this thermal radiation measurement part 50, a radiation thermometer can also be employ | adopted and a thermo viewer can also be employ | adopted. When using a radiation thermometer, the introduction cost can be reduced compared to the case where a thermoviewer is introduced, and information processing is facilitated because extra information is not acquired compared to the thermoviewer. Can do. On the other hand, when the thermo viewer is employed, detailed information can be acquired. Even if a thermoviewer is adopted, information necessary for detection (for example, position information) is acquired in advance so that extra information is acquired and information processing becomes complicated. Can be prevented.

  As shown in FIGS. 1 and 2, the plurality of heat seal portions 30 extend along the conveying direction of the first body 61 and the second body 62 and correspond to the bottom of the manufactured bag. A bottom seal portion 31 for heat-sealing and extending in a horizontal direction perpendicular to the conveying direction of the first body 61 and the second body 62 in the width direction of the bag to be manufactured Side seal portion 32 for heating and heat-sealing a portion corresponding to the edge, and a portion corresponding to an edge in the width direction of the bag to be manufactured, including bottom material 63, first body 61, and second body A point seal portion 33 is included for heating and heat-sealing a portion on the boundary line between the portion where the material 62 overlaps and the bottom material 63 and the portion where the first body 61 and the second body 62 do not overlap. ing. In the present embodiment, as shown in FIG. 3, each of the bottom seal portion 31, the side seal portion 32, and the point seal portion 33 includes a hot plate 31a, 32a, 33a and the hot plate 31a, 32a, 33a. Temperature detectors 36, 37, and 38 for detecting the temperature of the. The hot plates 31a, 32a, 33a and the temperature detectors 36, 37, 38 receive the detection results from the temperature detectors 36, 37, 38 and adjust the temperature of the hot plates 31a, 32a, 33a. 80 is connected.

  Incidentally, as an example of the size of the bag manufactured by the bag making machine 100 of the present embodiment, there can be mentioned one having a width of about 100 mm to 250 mm and a height of about 150 mm to 250 mm. Moreover, according to the bag making machine 100 of the present embodiment, for example, about 60 to 100 bags can be manufactured per minute, and the heat sealing by the heat sealing unit 30 is performed about 60 to 100 per minute. Become.

  When the first body 61 and the second body 62, or the first body 61, the second body 62, and the bottom material 63 are intermittently fed, the first body 61 and the second body 62 are supplied. Alternatively, the first body member 61, the second body member 62, and the bottom member 63 do not come out of the bottom seal part 31 by one movement, and these are pressed by the bottom seal part 31 a plurality of times (for example, a maximum of three times). It will be heated and pressed (see FIG. 4). On the other hand, with respect to the side seal portion 32 and the point seal portion 33, the first body 61 and the second body 62, or the first body 61, the second body 62, and the bottom material 63 are moved by one movement. The side seal portion 32 and the point seal portion 33 are removed (see FIG. 5). In addition, regarding the edge in the width direction of the bag, as described above, when heat sealing is performed at a speed of 60 to 100 per minute and processed at a high speed, the side seal portion 32 is pressed once and heated. Since it is not possible to sufficiently heat only, a plurality of (three in the present embodiment) side seal portions 32 are provided. And the edge of the width direction of a bag will be heat-sealed because the same location is heat-pressed by each side seal part 32. FIG. Incidentally, the first body 61 and the second body 62 in one intermittent feed, or the movement distance of the first body 61, the second body 62 and the bottom material 63 is the length of the width of the bag to be manufactured. Will correspond. 4 and 5 show only the first body 61 and the second body 62 for one bag in the height direction of the bag to be manufactured.

  As shown in FIG. 4, the height of the portion heated by the bottom seal portion 31 (that is, the length in the direction perpendicular to the conveying direction of the first body 61 and the second body 62 in the horizontal direction) is manufactured. The bottom seal portion 31 is a so-called “ship bottom type” which heat-presses and heat-seals a portion corresponding to the bottom of the bag.

  Incidentally, in the present embodiment, the “transport direction of the first body 61 and the second body 62” is the same direction as the “transport direction of the bottom material 63”, and is a direction from right to left in FIGS. 1 and 2. However, in the description of the present embodiment, it is not referred to as “the conveyance direction of the first body 61, the second body 62, and the bottom material 63”, but simply “the first body 61 and the second body 62. It will be referred to as the “transport direction”.

  In the present embodiment, at least one heat seal portion 30 of the plurality of heat seal portions 30 has a pair of hot plates, and each of the hot plates constituting the pair of hot plates is made of a metal material. Yes. As shown in FIG. 1, in this embodiment, the bottom seal portion 31 has a pair of hot plates 31a and 31a, and the point seal portion 33 has a pair of hot plates 33a and 33a. Each of 31a, 31a, 33a, 33a is made of a metal material. Each of the pair of heat plates 31a and 31a is disposed so as to face each other. Similarly, each of the pair of heat plates 33a and 33a is disposed so as to face each other. And the part heated by the pair of hot plates 31a and 31a or the pair of hot plates 33a and 33a is sandwiched, so that the heat-sealed portion is heated and pressed.

  The side seal portion 32 of the present embodiment includes a heat plate 32a and an elastic portion 32c made of silicon rubber or the like disposed so as to face the heat plate 32a. And when the part heated by these hot plates 32a and the elastic part 32c is pinched | interposed, the part heat-sealed will be hot-pressed.

  When a plurality of side seal portions 32 are provided as in the present embodiment, the positional relationship between the hot plate 32a and the elastic portion 32c may be alternately changed, specifically as shown in FIG. Further, in the side seal portion 32 located on the most upstream side in the conveying direction of the first body 61 and the second body 62, the heat plate 32a is located above the elastic portion 32c, and in the next side seal portion 32, the heat plate 32a may be located below the elastic part 32c, and the heat plate 32a may be located above the elastic part 32c in the side seal part 32 located most downstream.

  In the present embodiment, three side seal portions 32 and one point seal portion 33 are provided. And the side seal part 32 located in the most upstream side in the conveyance direction of the 1st trunk | drum 61 and the 2nd trunk | drum 62 is provided, the point seal | sticker part 33 is provided immediately after that, and another one side is provided immediately after that. A seal portion 32 is provided, and immediately after that, a side seal portion 32 located on the most downstream side is provided. In the present embodiment, “immediately after” means that the first body 61 and the second body 62, or the first body 61, between the member and the member disposed “immediately after that”, This means that there is no member that performs any processing on the second body member 62 and the bottom member 63.

  By the way, the mode shown in FIGS. 1 and 2 is an example, and the number and arrangement of the bottom seal part 31, the side seal part 32, and the point seal part 33 are not limited to the modes shown in FIGS. It is important to note that there is no such thing.

  As shown in FIGS. 1 and 2, the heat dissipation measurement unit 50 of the present embodiment includes a first heat dissipation measurement unit 51 that measures the surface temperature of the portion heated and pressed by the point seal unit 33 in a non-contact manner, and a bottom seal. And a second heat radiation measurement unit 52 that measures the surface temperature of the portion heated and pressed by the unit 31 in a non-contact manner.

  More specifically, the second heat radiation measurement unit 52 is disposed immediately after the bottom seal portion 31 in the conveyance direction of the first body 61 and the second body 62. And in the conveyance direction of the 1st body 61 and the 2nd body 62, immediately after this 2nd heat radiation measurement part 52, the 1st body 61 and the 2nd body 62 which were heat-pressed by the bottom seal part 31 are carried out. A bottom cooling unit 41 for cooling is provided. As shown in FIG. 4, the second heat radiation measurement unit 52 of the present embodiment measures the surface temperatures of two locations where the heights of the portions heated and pressed by the bottom seal portion 31 are different from each other in a non-contact manner. ing. In other words, the second heat radiation measurement unit 52 measures two locations, a narrow seal width portion and a wide seal portion, in accordance with the shape of the hot plate 31 a used in the bottom seal portion 31. More specifically, as shown in FIG. 4, the second heat radiation measurement unit 52 is a portion where the height of the portion heated and pressed by the bottom seal portion 31 is maximized (the end in the width direction of the manufactured bag). : The surface temperature of the “temperature measurement location” on the left side in FIG. 4) and the minimum location (the center in the width direction of the bag to be manufactured: the “temperature measurement location” on the right side in FIG. 4) are measured without contact. It has become.

  As shown in FIG. 1 and FIG. 2, in the present embodiment, the first heat radiation measurement unit 51 includes the side seal portion 32 located on the most downstream side in the transport direction of the first body 61 and the second body 62. It is placed immediately after. Then, in the conveying direction of the first body 61 and the second body 62, the first body 61 and the first body 61 that are heated and pressed by the side seal part 32 and the point seal part 33 immediately after the first heat radiation measurement part 51. The side point cooling part 42 for cooling the 2 body 62 or the 1st body 61, the 2nd body 62, and the bottom material 63 is provided.

  As shown in FIG. 5, the first heat radiation measurement unit 51 of the present embodiment is configured to measure the location hot-pressed by the point seal unit 33 at a pinpoint. In addition, as shown in FIG. 5, the 1st heat radiation measurement part 51 of this Embodiment measures temperature on the boundary line of two bags manufactured, and is manufactured by one measurement. The temperature of the part which becomes the edge of the width direction of two bags which can be measured can be measured now.

  Incidentally, the heat radiation measuring part 50 such as the first heat radiation measuring part 51 and the second heat radiation measuring part 52 is not located at the same position as the bottom seal part 31 and the point seal part 33, but is arranged immediately after these. This is because the target location is not exposed and the temperature cannot be measured while the target location is heat sealed by 31 or the point seal portion 33.

  As one modification, the heat radiation measuring unit 50 may include a third heat radiation measuring unit 53 that measures the surface temperature of the portion heated and pressed by the side seal part 32 in a non-contact manner (see FIG. 3). In this case, for example, as shown in FIG. 10, the third heat radiation measurement unit 53 is provided at the same position as the first heat radiation measurement unit 51 in the transport direction of the first body 61 and the second body 62. Also good. The third heat radiation measuring unit 53 may be configured to measure the surface temperature in a non-contact manner at a plurality of locations among the portions heated by the side seal portion 32, and is manufactured, for example, as shown in FIG. You may measure the both ends and center part in the height direction of a bag.

  Incidentally, as an example of the scene where the above-described third heat radiation measurement unit 53 is adopted, the side seal portion 32 is not an embodiment having the hot plate 32a and the elastic portion 32c as in the present embodiment. A case where a pair of hot plates 32a and 32a are provided and a portion to be heated is sandwiched between the pair of hot plates 32a and 32a is heated. When the pair of hot plates 32a and 32a are used in this way, fragments of the first body 61, the second body 62, or the bottom material 63 (hereinafter also simply referred to as “film”) are a pair of hot plates. As a result of being sandwiched between 32a and 32a, the heat plates 32a and 32a are in contact with the first body 61 and the second body 62 while being inclined, and the pressure at the time of pressing is released, so that the heat seal is not normally performed. This is because there is a possibility.

  Further, as shown in FIGS. 1 and 2, the bag making machine 100 of the present embodiment has a first downstream side of the side point cooling unit 42 in the conveying direction of the first body 61 and the second body 62. A cutter unit 70 is provided that cuts the first body 61 and the second body 62 at appropriate locations to generate a bag. Further, on the downstream side of the cutter unit 70, a conveyor 75 that conveys the manufactured bag further downstream is provided.

  In addition, when producing a stand bag with the bag making machine 100 of this Embodiment, the 1st trunk | drum 61, the 2nd trunk | drum 62, and the bottom material 63 which consist of a film are intermittently sent, and the 1st trunk | drum 61, When the conveyance of the second body 62 and the bottom material 63 is stopped, a portion corresponding to the bottom of the bag manufactured by the bottom seal portion 31 is heated and pressed in the width direction of the bag manufactured by the point seal portion 33. A portion corresponding to the edge, a portion where the bottom material 63 overlaps the first body 61 and the second body 62, and a portion where the bottom material 63 does not overlap the first body 61 and the second body 62. A portion on the boundary line is heated and pressed, and a portion corresponding to the edge in the width direction of the bag manufactured by the side seal portion 32 is heated and pressed.

  By the way, when producing a stand bag, when the part corresponding to the bottom of the bag manufactured by the bottom seal portion 31 is heated and pressed, the first body 61, the second body 62, and the bottom 63 are The overlapped film is heat sealed. When the portion corresponding to the edge in the width direction of the bag manufactured by the side seal portion 32 is hot-pressed, the film and the bottom material 63 in which the first body 61 and the second body 62 overlap and overlap each other. And the film in which the first body 61 and the second body 62 overlap and form a quadruple are heat-sealed. When point sealing is performed by the point seal portion 33, a portion where the bottom material 63 overlaps the first body 61 and the second body 62, and the bottom material 63, the first body 61 and the second body 62 are formed. The part on the boundary line with the non-overlapping part is heated and pressed, that is, the boundary part between the doubled film and the four-layered film is heat-sealed (see FIG. 9). Incidentally, such heat sealing by the point seal portion 33 is performed in order to close a gap formed between the first body 61 and the second body 62 and the bottom material 63.

  As shown in FIG. 3, the control unit 80 of the present embodiment is connected to the heat radiation measurement unit 50, the feed mechanism 20, the cutter unit 70, the conveyor 75, the heat seal unit 30 and the like, and gives operation commands to them. Or get information from them.

[Detection of insufficient seal strength by the point seal 33]
Next, detection of insufficient seal strength in heat sealing by the point seal portion 33 will be described. The first heat radiation measuring unit 51 including a radiation thermometer is the surface temperature of the portion heated and pressed by the point seal unit 33 at the timing when the movement of the first body 61, the second body 62, and the bottom material 63 is stopped. Is measured without contact. If the measured temperature is within a separately set range, the control unit 80 determines that the heat sealing by the point seal unit 33 is normal.

The temperature range in which heat sealing by the point seal portion 33 is determined to be normal differs depending on the film material (layer configuration, thickness), sealing time, hot plate temperature, etc., but as an example, the relationship between the surface temperature and the sealing strength Will be described with reference to the following table 1 and the graph shown in FIG. Incidentally, the melting point of the sealant provided on the first body 61, the second body 62, and the bottom member 63 is, for example, about 110 ° C. to 120 ° C., and the temperature of the hot plates 31a, 32a, 33a is, for example, 170 ° C. to 200 ° C. It is about ℃.

  According to Table 1, when the temperature of the hot plate 33a is 170 ° C., the seal strength is 73.50 N / 15 mm and the seal strength is normal (OK), whereas when the temperature of the hot plate 33a is 130 ° C., the seal strength is high. It can be understood that the seal strength becomes abnormal (NG) because of 36.13 N / 15 mm. Further, as understood from the graph shown in FIG. 6, when the temperature of the hot plate 33a changes by 40 ° C. (at 170 ° C. and 130 ° C.), the surface temperature of the heated and pressed portion changes by about 30 ° C. I understand that. From the above, it can be understood that the seal strength can be indirectly determined by measuring the surface temperature of the portion heated and pressed by the hot plates 31a, 32a and 33a.

[Detection of defect due to foreign object pinching by bottom seal portion 31]
Next, detection of a defect due to a foreign object (“cellophane tape” in the present embodiment) sandwiched by the bottom seal 63 by the bottom seal portion 31 will be described. As a mode in which the foreign matter is sandwiched, there are a case where the foreign matter is sandwiched at the measurement location of the second heat radiation measurement unit 52 such as a radiation thermometer and a case where the foreign matter is sandwiched at a place other than the measurement location of the second heat radiation measurement unit 52. Conceivable.

  First, as shown in FIG. 7A, a case where a foreign object is caught between measurement points of the second heat radiation measurement unit 52 will be described with reference to the graph shown in FIG. Since the heat capacity increases due to the presence of the foreign matter, the temperature measured by the second heat radiation measurement unit 52 is lower than the case where there is no foreign matter, as can be understood from the graph shown in FIG.

  Next, the case where there is no foreign substance at the measurement point of the second heat radiation measurement unit 52 as shown in FIG. When the foreign material enters, the pair of hot plates 31a, 31a made of a metal material is in contact with the first body member 61 and the second body member 62 while being inclined, so that the pressure at the time of pressing is released. For this reason, insufficient heating occurs for the first body 61 and the second body 62, or the first body 61, the second body 62, and the bottom material 63. As a result, the graph shown in FIG. As described above, a temperature drop occurs before and after a portion with foreign matter.

  As can be understood from the above description, the heat radiation measuring units 51, 52, and 53 are heated and pressed by the heat seal unit 30 (particularly heated by the pair of hot plates 31a, 31a, 32a, 32a, 33a, and 33a). The presence or absence of foreign matter can be determined by measuring the temperature of the pressed portion).

Incidentally, the relationship between the thickness of the foreign matter and the seal strength is as shown in Table 2 below, and it can be understood that the seal strength decreases as the thickness of the foreign matter increases.

"effect"
Next, effects achieved by the present embodiment having the above-described configuration, which have not yet been described, or particularly important effects will be described.

  According to the present embodiment, the heat dissipation measurement unit 50 measures the surface temperature of the portion of the first body 61 or the second body 62 that is heated and pressed by the heat seal unit 30 in a non-contact manner. For this reason, the part heat-pressed by the heat seal part 30 can be detected at any time, and even if the temperature of the heat seal part 30 that heat-presses the first body 61 or the second body 62 is normal, heat is generated. When an abnormality that cannot be performed normally occurs, the abnormality can be detected immediately. In addition, as a cause of such an abnormality, as described above, a portion to be heated due to foreign matters such as these pieces (film pieces) entering between the body members 61 and 62 and the bottom material 63. A pair of heat plates 31a, 31a, 32a, 32a, 33a, 33a made of a metal material due to the increase in the heat capacity or the entry of foreign matter between the body members 61, 62 and the bottom member 63. It is conceivable that the pressure when pressing by coming into contact with the first body 61 and / or the second body 62 while inclining is released.

  More specifically, in the present embodiment, since the second heat radiation measurement unit 52 measures the surface temperature of the portion heated and pressed by the bottom seal portion 31 in a non-contact manner, it is heated and pressed by the bottom seal portion 31. In the case where an abnormality occurs in which the portion is not normally heated, the abnormality can be detected immediately.

  Moreover, in this Embodiment, as shown in FIG.1 and FIG.2, the 2nd thermal radiation measurement part 52 is arrange | positioned immediately after the bottom seal part 31 in the conveyance direction of the 1st trunk | drum 61 and the 2nd trunk | drum 62. Therefore, immediately after being heated and pressed at the bottom seal portion 31, the surface temperature of the portion heated and pressed at the bottom seal portion 31 can be measured, and the presence or absence of the abnormality is detected using a more accurate temperature. can do.

  Moreover, in this Embodiment, as shown in FIG. 4, the 2nd thermal radiation measurement part 52 measures the surface temperature of at least 2 places from which the height of the part heat-pressed by the bottom seal part 31 mutually differs in non-contact. To do. For this reason, it is possible to measure the surface temperature of at least two portions of the portion heated and pressed by the bottom seal portion 31, and whether or not the abnormality is present when the bottom seal portion 31 is heated and pressed. It can be detected with high accuracy.

  In particular, as shown in FIG. 4, the second heat radiation measurement unit 52 of the present embodiment has a portion where the height of the portion heated and pressed by the bottom seal portion 31 is maximized (the end portion in the width direction of the manufactured bag). : The surface temperature of the “temperature measurement location” on the left side in FIG. 4) and the minimum location (the center in the width direction of the bag to be manufactured: the “temperature measurement location” on the right side in FIG. 4) are measured without contact. It has become. For this reason, based on the surface temperature of the part (the center part in the width direction of the bag to be manufactured) where the height of the part heat-pressed by the bottom seal part 31 where the strength is weakest is minimized. Presence or absence can be detected, and the distance (manufacturing) is the farthest from the position (the center in the width direction of the bag to be manufactured) where the height of the heat-pressed portion is minimized within the range of the bag to be manufactured The presence or absence of the abnormality can also be detected based on the surface temperature of the bag in the width direction. Accordingly, the surface temperature of the portion heated and pressed by the bottom seal portion 31 can be detected in a well-balanced manner, and the presence or absence of the abnormality when heated and pressed by the bottom seal portion 31 can be detected with higher accuracy.

  Moreover, in this Embodiment, since the 1st heat dissipation measurement part 51 measures the surface temperature of the part heat-pressed by the point seal | sticker part 33, the part heat-pressed by the point seal | sticker part 33 is normal. When an abnormality that is not heated is generated, the abnormality can be detected immediately.

  Further, in the present embodiment, as shown in FIGS. 1 and 2, the side seal portion 32 that is located on the most upstream side in the conveying direction of the first body 61 and the second body 62 is provided, and immediately after that. The point seal portion 33 is provided, another one side seal portion 32 is provided immediately thereafter, and the side seal portion 32 positioned on the most downstream side is provided immediately thereafter. And the 1st heat dissipation measurement part 51 is arrange | positioned immediately after the side seal part 32 located in the most downstream side in the conveyance direction of the 1st trunk | drum 61 and the 2nd trunk | drum 62. FIG. For this reason, immediately after the completion of all the heat presses for the point-sealed portion, the portion subjected to the heat press at the point seal portion 33 (more precisely, the heat press is performed by all of the point seal portion 33 and the three side seal portions 32). The surface temperature of the portion) can be measured, and the presence or absence of the abnormality can be detected using an accurate temperature. In addition, it is not such an aspect, and the 1st heat radiation measurement part 51 may be arrange | positioned immediately after the point seal | sticker part 33, and in this case, whether the heat press by the point seal | sticker part 33 is correctly performed normally. Can be detected.

  In addition, the material to be filled in the manufactured bag is not particularly limited. For example, when the bag is filled with a surfactant, the portion to be heated and pressed by the point seal portion 33 is not firmly heat-sealed. Since the surfactant is particularly easily leaked, the abnormality can be detected immediately when an abnormality that cannot be normally performed by the point seal portion 33 as in the present embodiment occurs. Is very beneficial.

  Incidentally, when the third heat radiation measuring unit 53 is adopted, the third heat radiation measuring unit 53 measures the surface temperature of the portion heated and pressed by the side seal portion 32 in a non-contact manner, and therefore the side seal portion 32. When an abnormality occurs in which the heated and pressed portion is not normally heated, the abnormality can be detected immediately.

  And as shown in FIG. 10, when providing the 3rd heat radiation measurement part 53 in the same position as the 1st heat radiation measurement part 51 in the conveyance direction of the 1st body material 61 and the 2nd body material 62, it is a side seal. Immediately after all the heating presses are finished with respect to the place to be performed, the surface temperature of the parts heated and pressed by all the three side seal portions 32 can be measured, and the presence or absence of the abnormality is detected using the accurate temperature. can do.

  As shown in FIG. 10, the third heat radiation measurement unit 53 may be configured to measure the surface temperature in a non-contact manner at a plurality of locations in the portion heated and pressed by the side seal portion 32. For example, as shown in FIG. 10, when measuring both end portions and the central portion in the height direction of the manufactured bag, the surface temperature of the portion heated and pressed by the side seal portion 32 can be detected in a well-balanced manner. The presence / absence of the abnormality when the first body and / or the second body is heated by the side seal portion 32 can be detected with higher accuracy.

  Further, a plurality of third heat radiation measuring units 53 may be provided, and each third heat radiation measuring unit 53 may be provided immediately after each side seal portion 32. In this case, it is beneficial in that it is possible to detect whether the heating press by each side seal portion 32 is normally performed.

  Lastly, the description of the above-described embodiment and the disclosure of the drawings are merely examples for explaining the invention described in the claims, and are based on the description of the above-described embodiment or the disclosure of the drawings. The invention described in the claims is not limited.

20 Feed mechanism 21 Continuous feed mechanism 22 Intermittent feed mechanism 30 Heat seal part 31 Bottom seal part 31a Heat plate 32 Side seal part 32a Heat plate 33 Point seal part 33a Heat plate 50 Heat radiation measurement part 51 First heat radiation measurement part 52 Second heat radiation Measurement unit 53 Third heat radiation measurement unit 61 First body 62 Second body 63 Bottom material 80 Control unit 100 Bag making machine

Claims (11)

The first body and the second body are heated by heating the same part of the first body and the second body a plurality of times in a state where the first body and the second body are overlapped. In a bag making machine that manufactures bags by heat sealing
An intermittent feed mechanism for intermittently feeding the first body and the second body along a predetermined direction;
The first body and the second body are heated by heating at least one of the first body and the second body in a state where the first body and the second body are overlapped with each other. A plurality of heat seal portions for heat sealing,
Of the first body or the second body, a heat dissipation measurement unit that measures the surface temperature of the portion heated by the heat seal unit in a non-contact manner,
A bag making machine comprising: At least one of the plurality of heat seal portions has a pair of hot plates,
The bag making machine according to claim 1, wherein each of the hot plates constituting the pair of hot plates is made of a metal material. The intermittent feed mechanism is sandwiched between the first body and the second body and intermittently feeds the bottom material constituting the bottom of the bag to be manufactured,
The plurality of heat seal portions include a portion where the bottom material overlaps the first body material and the second body material, and a portion where the bottom material does not overlap the first body material and the second body material. The bag making machine according to claim 1, further comprising a point seal portion for heating and heat-sealing a portion on the boundary line.   The bag making machine according to claim 3, wherein the heat radiation measuring unit includes a first heat radiation measuring unit that measures a surface temperature of a portion heated by the point seal part in a non-contact manner.   The bottom seal part for heating and heat-sealing the part corresponding to the bottom of the bag manufactured in the plurality of heat seal parts is given in any 1 paragraph of Claims 1 thru / or 4 characterized by things. The bag making machine described.   The said heat dissipation measurement part has a 2nd heat dissipation measurement part which measures the surface temperature of the part heated by the said bottom seal part non-contactingly, The bag making machine of Claim 5 characterized by the above-mentioned. The bottom seal portion heats the portion corresponding to the bottom of the manufactured bag so that the height of the portion heated by the bottom seal portion decreases from the edge in the width direction of the manufactured bag toward the center.
The said 2nd heat radiation measurement part measures the surface temperature of at least 2 places from which the height of the part heated by the said bottom seal part mutually differs non-contactingly, either of Claim 5 or 6 characterized by the above-mentioned. Bag making machine.   The second heat radiation measurement unit measures at least the surface temperature of the portion where the height of the portion heated by the bottom seal portion is maximized and the portion where the height is minimized in a non-contact manner. The bag making machine described.   9. The side seal part for heating and heat-sealing a part corresponding to the edge of the width direction of the bag to be manufactured in the plurality of heat seal parts. Item 1. A bag making machine according to item 1.   The bag making machine according to claim 9, wherein the heat radiation measuring unit includes a third heat radiation measuring unit that measures a surface temperature of a portion heated by the side seal portion in a non-contact manner.   11. The bag making machine according to claim 10, wherein the third heat radiation measuring unit measures the surface temperature in a non-contact manner at a plurality of locations among the portions heated by the side seal portion.

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