JP2020066453A - Seal method and seal device - Google Patents

Abstract

To provide a seal method and a seal device that can seal a seal-planned part while suppressing occurrence of wrinkles on the seal-planned part of a bag with a chuck part.SOLUTION: A seal method includes: a process of bringing a pressing part 42 into contact with a part of a bag 90, which has a seal-planned part 91 and a chuck part 92, between the seal-planned part 91 and the chuck part 92; and a process which, in a state where the pressing part 42 is in contact with the part between the seal-planned part 91 and the chuck part 92, seals the seal-planned part 91 by having the seal-planned part 91 interposed between a first sealing body 44 and a second sealing body 45.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a sealing method and a sealing device for sealing a bag having a chuck portion.

  Patent Document 1 discloses a zipper fastening and sealing device for a packaging bag with a zipper. According to this apparatus, after the chuck of the zipper packaging bag is forcibly tightened by the chuck tightening bar, the bag mouth is pressed and heated by the fusion sealing bar to be sealed.

Japanese Utility Model Publication No. 63-13135

  In the device of Patent Document 1, the fusing bar is provided to seal the mouth of the upper end of the bag, whereas the chuck fastening bar applies a force to the chuck provided at a position away from the upper end of the bag. It is provided for adding. Therefore, the chucking bar is arranged at a position separated downward from the fusion sealing bar, and there is no member that contacts the bag between the chucking bar and the fusion sealing bar. In this device, when the fusible bar presses and heats the bag, unintended wrinkles occur in the part of the bag against which the fusible bar is pressed. It is considered that one of the causes of such wrinkles is that the portion to be sealed (mouth portion) of the bag is compressed and heated without having a desired flat shape.

  Generally, in the case of a bag having no chuck portion, both sides of the bag are pulled by the grippers in opposite directions to each other in the width direction, so that the portion to be sealed of the bag is tense and can have a desired flat shape. By subjecting the pre-sealing portion to the sealing treatment while maintaining such a flat shape, it can be neatly sealed without wrinkling.

  On the other hand, in the case of a bag having a chuck portion, the sealing process is usually performed in a state where both side portions of the bag below the chuck portion are gripped by the grippers. That is, there is a chuck portion between the gripper and the portion to be sealed. In this case, even if both sides of the bag are pulled by the gripper, due to the existence of the chuck part, the planned sealing part (mouth) of the bag cannot be properly tensioned, and the planned sealing part has a desired flat shape. I can't. When the sealing process is performed in a state where the planned sealing portion has a non-flat shape, unintended wrinkles occur in the planned sealing portion.

  Such wrinkles occurring in the planned sealing portion during the sealing process may not only impair the aesthetic appearance of the bag but also the reliability of the sealing performance of the bag. In particular, even if there is no problem in the actual sealing performance, the presence of unintended wrinkles in the seal portion makes the user of the bag feel uneasy and tends to avoid the bag having such wrinkles. .

  The present invention has been made in view of the above circumstances, and provides a technique capable of sealing a predetermined sealing portion while suppressing the occurrence of wrinkles in the predetermined sealing portion of a bag having a chuck portion.

  One aspect of the present invention includes a step of bringing a pressing portion into contact with a portion of a bag having a planned sealing portion and a chuck portion between the planned sealing portion and the chuck portion, and a portion between the planned sealing portion and the chuck portion. And a step of sealing the planned sealing part by sandwiching the planned sealing part with the first seal body and the second seal body while the pressing part is in contact with the sealing part.

  In the step of bringing the pressing portion into contact with the portion between the sealing target portion and the chuck portion, the portion between the sealing target portion and the chuck portion is sandwiched by the first pressing body and the second pressing body included in the pressing portion. Good.

  In the step of sealing the planned sealing portion, at least one of the first sealing body and the second sealing body is configured to seal the planned sealing portion while the first sealing body and the second sealing body are in contact with the planned sealing portion. The method may include a step of heating and a step of cooling the scheduled seal portion by bringing the cooling portion into contact with the scheduled seal portion after the scheduled seal portion is heated by at least one of the first seal body and the second seal body. .

  The method may further include the step of closing the chuck portion.

  Another aspect of the present invention is a sealing device that seals a planned sealing portion of a bag having a chuck portion, the first sealing body and the second sealing body sealing the planned sealing portion in a state of being in contact with the planned sealing portion. And a first seal body and a second seal body that can be arranged at a seal retreat position away from the planned seal part and a seal contact position in contact with the planned seal part, and a planned seal part and a chuck part of the bag. A pressing retreat position arranged at a position distant from the intervening part, a pressing contact position arranged at a position contacting the part between the pre-sealing part and the chuck part, and a pressing part disposable at the position. The first sealing body and the second sealing body relate to a sealing device that sandwiches a planned sealing portion and seals the planned sealing portion in a state where the pressing portion is in contact with a portion between the planned sealing portion and the chuck portion.

  The pressing portion has a first pressing body and a second pressing body, and when the pressing portion is arranged at the pressing contact position, the portion between the planned seal portion and the chuck portion is formed by the first pressing body and the second pressing body. May be sandwiched.

  The sealing device further includes a cooling unit that cools the planned sealing portion, and at least one of the first seal body and the second sealing body heats the planned sealing portion to seal the planned sealing portion, and the cooling unit. May heat the scheduled sealing portion by at least one of the first sealing body and the second sealing body, and then contact the scheduled sealing portion to cool the scheduled sealing portion.

  The sealing device may further include a chuck closing portion that sandwiches the chuck portion and closes the chuck portion.

  The pressing portion has an elastic body, and when the pressing portion is arranged at the pressing contact position, the elastic body may contact the portion between the pre-sealing portion and the chuck portion.

  The chuck portion extends in the width direction, the pre-sealing portion extends in the width direction, and the portion between the pre-sealing portion and the chuck portion that comes into contact with the holding portion arranged at the holding contact position has the width. It may be narrower in direction than the chuck portion.

  According to the present invention, the planned sealing portion can be sealed while suppressing the occurrence of wrinkles in the planned sealing portion of the bag having the chuck portion.

FIG. 1 is a plan view showing an example of a packaging system. FIG. 2 is a schematic view of a bag having no gusset portion. FIG. 3A is a schematic view of a bag having a gusset portion. FIG. 3B is a sectional view taken along a section line IIIB-IIIB shown in FIG. 3A. FIG. 4 is a schematic view of a lateral cross-sectional configuration of the heating seal portion, showing a state in which the seal portion is arranged at the seal retreat position and the holding portion is arranged at the holding retreat position. FIG. 5 is a schematic plan view of the heat seal unit shown in FIG. FIG. 6 is a schematic view of a lateral cross-sectional structure of the heating seal portion, showing a state in which the seal portion is arranged at the seal retreat position and the pressing portion is arranged at the pressing contact position. FIG. 7 is a schematic view of a lateral cross-sectional structure of the heating seal portion, showing a state in which the seal portion is arranged at the seal contact position and the pressing portion is arranged at the pressing contact position. FIG. 8 is a diagram showing an outline of a side sectional configuration of the cooling seal portion.

  Hereinafter, a case where the sealing method and the sealing device according to the embodiment of the present invention are applied to a packaging system will be described. However, the application target of the sealing method and the sealing device according to the embodiment of the present invention is not limited, and the sealing method and the sealing device according to the embodiment of the present invention can be applied to other methods and devices.

  In the following description, "height direction" means a direction parallel to the vertical direction in which gravity acts, "horizontal direction" means a direction perpendicular to the height direction, and "upstream" unless otherwise specified. And "downstream" are based on the bag conveyance direction.

[Packaging system]
FIG. 1 is a plan view showing an example of the packaging system 10.

  The packaging system 10 includes a rotary table 12 installed on a pedestal 13, and a plurality of bag holding portions 11 attached to the outer peripheral portion of the rotary table 12 at equal intervals. Each bag holding unit 11 circulates through a plurality of stations (first station S1 to tenth station S10 in the illustrated packaging system 10) in response to intermittent or continuous rotation of the turntable 12 while holding the bag. . The number and the specific configuration of the bag holding units 11 are not limited, and in the illustrated packaging system 10, a plurality of bag holding units 11 are configured by the same number of grippers as the number of stations (that is, 10 grippers).

  The bag holding unit 11 arranged at the first station S1 receives the bag from the conveyor magazine 14 via a repeater (not shown) such as a suction cup, and holds both sides of the bag.

  The illustrated bag holding portion 11 having the form of a gripper grips the lower portion of the chuck portion of the corresponding bag (that is, the portion between the chuck portion and the bottom portion of the corresponding bag). Therefore, a chuck portion exists between the portion gripped by the bag holding portion 11 and the planned sealing portion (that is, the mouth portion). Each bag holding unit 11 shown in the figure holds the corresponding bag in a suspended state, but may hold the corresponding bag in other forms. For example, in a state in which one side wall surface of the corresponding bag is placed on the placing surface (for example, an inclined surface) of the placing portion (not shown) provided on the rotary table 12, the bag holds the corresponding bag. It may be held by the part 11.

  A large number of bags are stored in the conveyor magazine 14. The bag storage form in the conveyor magazine 14 is not limited. For example, in the conveyor magazine 14, a plurality of bags can be stacked in a horizontal direction and stored while each bag is in an upright posture or an inclined posture. The upright posture here is a posture in which the side wall surfaces (that is, the front side surface and the back side surface) of each bag are oriented in the horizontal direction. The tilted posture is a posture in which the side wall surface of each bag is oriented in a direction inclined with respect to each of the horizontal direction and the height direction.

  The second station S2 is provided with the printing device 15, and the third station S3 is provided with the printing inspection device 16. The printing device 15 prints various information (for example, the date when the packaging process is performed) on the bag. The print inspection device 16 inspects whether or not the print state is proper, and includes, for example, an image sensor.

  The fourth station S4 is provided with an opening device 17, and the fifth station S5 is provided with a content feeding device 18.

  The opening device 17 opens the mouth of the bag. For example, the opening device 17 has two suction cups that can reciprocate in the horizontal direction, and these two suction cups are moved in a direction away from each other in a state of being sucked on the front side surface and the back side surface of the bag, respectively. By doing so, the mouth of the bag can be opened. At this time, if necessary, the two grippers for holding the both side portions of the bag (that is, the bag holding portion 11) move horizontally so as to approach each other, and the front side surface and the back side surface of the bag are bent.

  The content loading device 18 loads the content inside the bag through the opened mouth portion. For example, the content loading device 18 has a hopper (funnel), and can load the content into the bag from the hopper through the opened mouth. The content is not limited, and may be solid, liquid and / or gas, and may be food or daily necessities.

  A defect detection device 19 is provided at the sixth station S6, and a defective bag discharge device 20 is provided at the seventh station S7. The defect detection device 19 detects a defective state of the bag. The defect detection device 19 has an arbitrary configuration, and the target of the bag state defect detected by the defect detection device 19 is not limited. For example, the defect detection device 19 can detect whether or not the bag holding unit 11 holds the bag in an appropriate posture. The defective bag discharging device 20 discharges the bag determined by the print inspection device 16 to have a printing defect and the bag determined to have a defective condition by the defect detection device 19 to the outside of the packaging system 10. That is, the bag determined to have the defective printing and / or the defective state is released from the bag holding unit 11 at the seventh station S7, is received by the defective bag discharging device 20, and is sent to the outside by the defective bag discharging device 20. .

  The eighth station S8 is provided with a heating seal portion 21, and the ninth station S9 is provided with a cooling seal portion 22. Specific configuration examples of the heating seal portion 21 and the cooling seal portion 22 will be described later.

  A product bag discharging conveyor 23 is provided at the tenth station S10. The bags processed in the first station S1 to the ninth station S9 are released from the bag holding unit 11 in the tenth station S10, received by the product bag discharging conveyor 23, and sent to the subsequent stage by the product bag discharging conveyor 23.

[bag]
FIG. 2 is a schematic view of the bag 90 having no gusset portion. FIG. 3A is a schematic view of the bag 90 having the gusset portion 98. FIG. 3B is a sectional view taken along a section line IIIB-IIIB shown in FIG. 3A. 2 and 3A, a seal portion 41, a cooling portion 64, a holding portion 42, and a chuck closing portion 65, which will be described later, are virtually shown for reference. In the packaging system 10 shown in FIG. 1, the sealing unit 41, the cooling unit 64, the pressing unit 42, and the chuck closing unit 65 are not all arranged in the same station. In FIGS. 2 and 3A, these members are virtually shown only for the purpose of showing the positional relationship between the seal portion 41, the cooling portion 64, the chuck closing portion 65, and the chuck closing portion 65. .

  The illustrated bag 90 has a mouth portion 93 and a bottom portion 94 that face each other in the longitudinal direction, and both side portions 95 that face each other in the width direction that is perpendicular to the longitudinal direction. The mouth portion 93 is formed by the upper end portion of the bag 90, the bottom portion 94 is formed by the lower end portion of the bag 90, and the both side portions 95 are formed by the side end portions of the bag 90. The bag 90 has a front side wall portion 96 and a back side wall portion 97 that face each other in the thickness direction (that is, the direction perpendicular to the paper surface of FIGS. 2 and 3A). The contents (not shown) loaded in the fifth station S5 are accommodated in the inner space of the bag 90 formed between the front side wall part 96 and the back side wall part 97 (in particular, the inner space on the bottom part 94 side). ing. The front side wall portion 96 and the rear side wall portion 97 forming the mouth portion 93 of the bag 90 are fixed (welded) to each other to seal the mouth portion 93.

  The bag 90 used in this embodiment has a planned sealing portion 91 and a chuck portion 92.

  The planned sealing portion 91 is a portion of the bag 90 that is subjected to the sealing process, and is a portion of the bag 90 including the mouth portion 93 in the illustrated example. The planned sealing portion 91 extends in the width direction, and in particular, exists in the entire region of the bag 90 in the width direction.

  The chuck portion 92 can locally open and close the inner space of the bag 90, and can also be referred to as a zip portion or a fastener portion. The illustrated chuck portion 92 extends in the width direction and is arranged between the contents accommodated in the bag 90 and the planned sealing portion 91 (that is, between the bottom portion 94 and the planned sealing portion 91). There is. The chuck portion 92 has a first chuck body 92a (see FIG. 4 etc.) attached to the front side wall portion 96 and a second chuck body 92b (see FIG. 4 etc.) attached to the back side wall portion 97. The configurations of the first chuck body 92a and the second chuck body 92b are not limited as long as the first chuck body 92a and the second chuck body 92b can be fixed to and separated from each other. For example, one of the first chuck body 92a and the second chuck body 92b is a male chuck body, and the other is a female chuck body, and the convex portion of the male chuck body is the concave portion of the female chuck body. The chuck portion 92 can be closed by fitting the two into engagement with each other.

  The packaging system 10 and the sealing device 40 of the present embodiment process not only the bag 90 without the gusset portion 98 (see FIG. 2) but also the bag 90 with the gusset portion 98 (see FIGS. 3A and 3B). Is possible.

  The bag 90 shown in FIG. 2 does not have the gusset portion 98 and has a two-layer structure constituted by the front side wall portion 96 and the back side wall portion 97 over the entire width direction. The bag holding unit 11 shown in FIG. 2 grips only both side portions of the bag 90. Further, the entire width direction of the bag 90 is sandwiched by the seal portion 41, the cooling portion 64, and the chuck closing portion 65. Therefore, the sealing target portion 91 exists over the entire width direction of the bag 90. Further, the chuck portion 92 exists over the entire width direction of the bag 90, and the entire chuck portion 92 is provided so that it can be pressed by the chuck closing portion 65.

  The pressing portion 42 shown in FIG. 2 has a size corresponding to a part of the bag 90 (particularly the central portion in the width direction) in the width direction. However, the pressing portion 42 may have a size that covers the entire bag 90 in the width direction (see the reference numeral "42 '" shown in FIG. 2). From the viewpoint of appropriately correcting the posture of the planned sealing portion 91, it is preferable that the range of the bag 90 pressed by the pressing portion 42 (particularly the width direction range) is large, but the pressing portion 42 is not necessarily the width direction of the bag 90. Does not need to be pressed.

  On the other hand, the bag 90 shown in FIGS. 3A and 3B is also called a gusset bag and has gusset portions 98 (fold portions) on both side portions 95. The illustrated gusset portion 98 has a folded shape that projects toward the inner space of the bag 90, and a protruding tip portion 98 a (that is, a fold) of the gusset portion 98 extends in the longitudinal direction of the bag 90.

  Each of the planned sealing portion 91 and the chuck portion 92 is provided over both the gusset portion 98 and a portion other than the gusset portion 98. The form of the chuck portion 92 in the gusset portion 98 is not limited, and only one set of the first chuck body 92a and the second chuck body 92b (see FIG. 4) may be provided, or the first chuck body 92a and the second chuck body 92a. A plurality of chuck bodies 92b may be provided. The two wall portions forming the gusset portion 98 and facing each other, and not including the chuck portion 92, may be fixed to each other in advance.

  The bag holding portion 11 shown in FIGS. 3A and 3B holds only the gusset portion 98 of the bag 90. Further, the entire width direction of the bag 90 is sandwiched by the seal portion 41, the cooling portion 64, and the chuck closing portion 65. Therefore, the sealing target portion 91 exists over the entire width direction of the bag 90. Further, the chuck portion 92 exists over the entire width direction of the bag 90, and the entire chuck portion 92 is provided so that it can be pressed by the chuck closing portion 65. The pressing portion 42 shown in FIG. 3A has a size in the width direction that corresponds to a part of the bag 90 (particularly the center portion in the width direction). However, the pressing portion 42 may have a size that covers the entire bag 90 in the width direction (see the reference numeral “42 ′” shown in FIG. 3A).

  The portion of the bag 90 shown in FIG. 3A other than the gusset portion 98 (that is, the first component portion of the bag 90) is a two-layer structure in which a front side wall portion 96 and a back side wall portion 97 are stacked in the thickness direction as shown in FIG. 3B. Have a structure. On the other hand, the gusset portion 98 (that is, the second constituent portion of the bag 90) is composed of a larger number of layers than the portion other than the gusset portion 98, and the gusset portion 98 shown in FIGS. 3A and 3B has four layers in the thickness direction. Have a structure. In the bag 90 shown in FIGS. 3A and 3B, since the gusset portions 98 are formed on both side portions 95, the two-layer structure portion is sandwiched between the four-layer structure portions in the width direction. Therefore, in the bag 90 shown in FIGS. 3A and 3B, a relatively large gap is likely to be formed particularly in the two-layer structure portion (see FIG. 3B). It is considered that the sealing process tends to cause more noticeable wrinkles in the portion of the bag 90 where such a large gap is formed.

  The inventor of the present application actually performed the sealing process on the planned sealing portions 91 of the plurality of bags 90 having the structure shown in FIGS. 3A and 3B using a sealing device that does not include the pressing portion 42. As a result, in the planned sealing portion 91, in the two-layer structure portion (that is, the portion between the both side portions 95 (that is, the portion other than the gusset portion 98)) rather than the four-layer structure portion (that is, the both side portions 95 (that is, the gusset portion 98)). , Noticeable wrinkles were likely to occur. Therefore, from the viewpoint of effectively preventing the generation of wrinkles, the two-layer structure portion of the bag 90 shown in FIG. 3A and FIG. 3B is pressed by the pressing portion 42 to correct the posture of the two-layer structure portion and seal. Treatment is preferred.

[Seal device]
Next, a configuration example of the sealing device 40 will be described. Below, the case where the bag 90 (see FIG. 2) that does not have the gusset portion 98 is mainly used is described, but the sealing device 40 similarly applies to the bag 90 (see FIGS. 3A and 3B) that has the gusset portion 98. It is possible to process.

  The sealing device 40 of the present embodiment includes a heating sealing section 21 arranged at the eighth station S8 and a cooling sealing section 22 arranged at the ninth station S9.

[Heating seal part]
FIG. 4 is a schematic view of a lateral cross-sectional configuration of the heating seal portion 21, showing a state in which the seal portion 41 is arranged at the seal retreat position and the holding portion 42 is arranged at the holding retreat position. FIG. 5 is a schematic plan view of the heat seal portion 21 shown in FIG. FIG. 6 is a schematic diagram of a lateral cross-sectional configuration of the heating seal portion 21, showing a state in which the seal portion 41 is arranged at the seal retreat position and the pressing portion 42 is arranged at the pressing contact position. FIG. 7 is a schematic view of a lateral cross-sectional configuration of the heating seal portion 21, showing a state in which the seal portion 41 is arranged at the seal contact position and the pressing portion 42 is arranged at the pressing contact position.

  The illustrated heat seal portion 21 has a seal portion 41 and a pressing portion 42.

[Seal part]
The seal portion 41 is provided so as to be capable of reciprocating in the horizontal direction (particularly in the thickness direction of the bag 90; hereinafter also simply referred to as “thickness direction”), and the seal retreat position away from the seal intended portion 91 and the seal intended portion 91. Can be arranged at a seal contact position in contact with.

  The seal part 41 arranged at the seal contact position heats the planned seal part 91 while contacting the planned seal part 91 of the bag 90 to seal the planned seal part 91. In particular, the seal portion 41 of the present embodiment is in contact with the planned seal portion 91 in a state where the pressing portion 42 is in contact with the portion of the bag 90 between the predetermined seal portion 91 and the chuck portion 92. Seal 91.

  The illustrated seal portion 41 has a first seal body 44 and a second seal body 45. Each of the first seal body 44 and the second seal body 45 is formed of a plate member having excellent heat conductivity, and the heater wire 46 is provided inside.

  A heater heat source 47 (see FIG. 5) is connected to the heater wire 46. The heater heat source 47 generates heat under the control of a controller (not shown), and the heater wire 46 is heated by the heater heat source 47 to heat the first seal body 44 and the second seal body 45. In the illustrated example, the heater wire 46 continuously heats the first seal body 44 and the second seal body 45 while the heat seal portion 21 is operating. The first seal body 44 and the second seal body 45 heated by the heater wire 46 have a temperature at which the planned seal portion 91 can be sealed by coming into contact with the planned seal portion 91. Therefore, at the same time when the first seal body 44 and the second seal body 45 contact the planned sealing portion 91 of the bag 90, the substantial sealing process is started.

  The first seal body 44 is fixedly attached to the first heating advancing / retreating shaft 53 via the first seal body holding block 51. The second seal body 45 is fixedly attached to the second heating advance / retreat shaft 54 via the second seal body holding block 52. The first seal body 44 is attached to the first seal body holding block 51 via a heat insulating member (not shown), and the second seal body 45 is attached to the second seal body holding block 52 via a heat insulating member (not shown). Is attached to.

  The first heating advancing / retreating shaft 53 and the second heating advancing / retreating shaft 54 are reciprocally moved in the horizontal direction (particularly the thickness direction) by a driving unit (not shown). Specifically, with reference to the position of the bag holding unit 11 arranged at the eighth station S8 (that is, the portion of the bag 90 sandwiched by the bag holding units 11), the first seal body holding block 51 and the second seal body holding block 51 The seal body holding block 52 is reciprocally moved symmetrically in the horizontal direction. The drive unit that drives the first heating advancing / retreating shaft 53 and the second heating advancing / retreating shaft 54 may be controlled by a control unit (not shown).

  The first seal body 44 and the second seal body 45 are provided so as to face each other in the horizontal direction (particularly the thickness direction). Along with the horizontal movement of the first heating advancing / retreating shaft 53 and the second heating advancing / retreating shaft 54 (that is, the horizontal movement of the first sealing body holding block 51 and the second sealing body holding block 52), the first sealing body 44 and the second sealing body 44 The two seal bodies 45 are moved symmetrically in the horizontal direction so as to approach each other and move away from each other, and are disposed at the seal contact position and the seal retreat position.

  When the seal portion 41 is arranged at the seal contact position, the expected seal portion 91 is sandwiched by the first seal body 44 and the second seal body 45, and pressure is applied by the first seal body 44 and the second seal body 45. The planned seal portion 91 sandwiched by the first seal body 44 and the second seal body 45 arranged at the seal contact position and the bag 90 sandwiched by the bag holding portion 11 arranged at the eighth station S8. The part is located on the same plane extending parallel to the height direction (see FIG. 7).

  On the other hand, when the seal portion 41 is arranged at the seal retreat position (see FIG. 4), the first seal body 44 and the second seal body 45 are not in contact with the scheduled seal portion 91, and the scheduled seal portion 91 is the first seal body 91. No force is applied from the first seal body 44 and the second seal body 45.

[Holding part]
The pressing portion 42 is provided so as to be capable of reciprocating in the horizontal direction (particularly in the thickness direction), and can be arranged at the pressing retreat position and the pressing contact position. The holding portion 42 arranged at the holding retracted position is separated from the portion of the bag 90 between the planned sealing portion 91 and the chuck portion 92. The holding portion 42 arranged at the holding contact position comes into contact with the portion between the planned sealing portion 91 and the chuck portion 92.

  In the heat sealing portion 21 of the sealing device 40 shown in FIGS. 4 to 7, the portion of the bag 90 that comes into contact with the pressing portion 42 arranged at the pressing contact position (that is, the portion between the planned sealing portion 91 and the chuck portion 92). ) Is narrower than the chuck portion 92 in the width direction. In particular, when processing the bag 90 having the gusset portion 98, the size of the holding portion 42 in the width direction is set to a distance between the gusset portions 98 (that is, a portion of the bag 90 other than the gusset portion 98) as shown in FIG. 3A. It may be the same as the width size) or smaller than the distance. In this case, the holding portion 42 arranged at the holding contact position comes into contact with the portion of the bag 90 between the gusset portions 98 and supports the portion of the bag 90 having the two-layer structure (that is, the first constituent portion).

  The pressing portion 42 of this example has a first pressing body 55 and a second pressing body 56, as shown in FIGS. 4 to 7.

  When the pressing portion 42 is arranged at the pressing retracted position, the first pressing body 55 and the second pressing body 56 are arranged at positions apart from the front side wall portion 96 and the back side wall portion 97 of the bag 90, respectively.

  When the pressing portion 42 is arranged at the pressing contact position, the first pressing body 55 and the second pressing body 56 contact the front side wall portion 96 and the back side wall portion 97 of the bag 90, respectively. That is, the portion of the bag 90 between the planned sealing portion 91 and the chuck portion 92 is sandwiched and pressed by the first pressing body 55 and the second pressing body 56 arranged at the pressing contact position. Thereby, the front side wall portion 96 and the back side wall portion 97 between the first pressing body 55 and the second pressing body 56 are in close contact with each other, and the bag 90 of the bag 90 is interposed between the first pressing body 55 and the second pressing body 56. The size of the inner space is basically zero (0) or close to zero. Further, the size of the inner space in the planned sealing portion 91 is also reduced, and the front side wall portion 96 and the back side wall portion 97 forming the planned sealing portion 91 are restrained from bending and take an upright posture or a posture close to the upright posture.

  The first pressing body 55 and the second pressing body 56 have elastic bodies. The first pressing body 55 and the second pressing body 56 shown in the figure are entirely made of elastic bodies, but they may be partially made of elastic bodies. When the first pressing body 55 and the second pressing body 56 are partially made of an elastic body, the first pressing body 55 and the second pressing body 55 and the second pressing body 56 are arranged from the viewpoint of appropriately adhering the front side wall portion 96 and the back side wall portion 97 to each other. It is preferable that each facing surface of the body 56 (that is, the end surface of the first pressing body 55 on the second pressing body 56 side and the end surface of the second pressing body 56 on the first pressing body 55 side) is formed of an elastic body. According to this configuration, when the first pressing body 55 and the second pressing body 56 are arranged at the pressing contact position, the portion between the pre-sealing portion 91 and the chuck portion 92 (that is, the front side wall portion 96 and the back side wall portion). An elastic body contacts 97).

  The first pressing body 55 is held by the first pressing holding portion 57, and is fitted into the concave portion of the first pressing holding portion 57. The second pressing body 56 is held by the second pressing holding portion 58, and is fitted into the concave portion of the second pressing holding portion 58. The first presser holding portion 57 is attached to the first seal body holding block 51 via the first presser attaching portion 59, and the second presser holding portion 58 is attached to the second sealer holding block 52 via the second presser attaching portion 60. Is attached to.

  Therefore, the first pressing body 55 is fixedly attached to the first heating advancing / retreating shaft 53 via the first pressing holding portion 57, the first pressing attachment portion 59, and the first seal body holding block 51. (1) Moves horizontally along with the heating advance / retreat shaft 53. The second pressing body 56 is fixedly attached to the second heating advancing / retreating shaft 54 via the second pressing holding portion 58, the second pressing attachment portion 60, and the second seal body holding block 52, and It moves in the horizontal direction together with the heating advance / retreat shaft 54. Therefore, the first pressing body 55 and the second pressing body 56 are arranged at the pressing retreat position and the pressing contact position according to the horizontal movement of the first heating advancing / retreating shaft 53 and the second heating advancing / retreating shaft 54.

  When the first pressing body 55 is arranged in the pressing retreat position, the first pressing body 55 projects toward the bag 90 side (that is, the second pressing body 56 side) with respect to the first sealing body 44, and the first pressing body 55 is located. Is disposed closer to the front side wall portion 96 of the bag 90 than the end surface of the first seal body 44. Further, when the second pressing body 56 is arranged at the pressing retreat position, the second pressing body 56 projects toward the bag 90 side (that is, the first pressing body 55 side) with respect to the second seal body 45, and The end surface of 56 is arranged closer to the back side wall portion 97 of the bag 90 than the end surface of the second seal body 45.

  Therefore, when the first seal body holding block 51 and the second seal body holding block 52 move toward each other, the first pressing body 55 comes into contact with the front side wall portion 96 before the first seal body 44, Prior to the second seal body 45, the second pressing body 56 contacts the back side wall portion 97 (see FIG. 6).

  Then, in a state where the first pressing body 55 and the second pressing body 56 are in contact with the front side wall portion 96 and the back side wall portion 97, the first seal body holding block 51 and the second seal body holding block 52 further approach each other. Thus, the first seal body 44 comes into contact with the front side wall portion 96, and the second seal body 45 comes into contact with the back side wall portion 97. That is, the first pressing body 55 and the second pressing body 56 apply force to each other via the bag 90 and are elastically crushed in the horizontal direction, while the first sealing body 44 and the second sealing body 45 approach each other. (See Figure 7). In the process of the first seal body holding block 51 and the second seal body holding block 52 moving toward each other in this way, the first pressing body 55 and the second pressing body of the front side wall portion 96 and the back side wall portion 97 are The portions between and 56 are in close contact with each other, and then the sealing target portion 91 is sandwiched and sealed by the first seal body 44 and the second seal body 45.

  As described above, in the state where the bag 90 is pressed and held by the first pressing body 55 and the second pressing body 56, the first sealing body 44 and the second sealing body 45 come into contact with the bag 90 and the planned sealing portion. Seal 91 (see FIGS. 6 and 7). Therefore, the seal portion 41 (that is, the first seal body 44 and the second seal body 45) has a posture to be corrected by the holding portion 42 (that is, the first holding body 55 and the second holding body 56), and is a planned sealing portion. The seal treatment is performed by contacting 91. As a result, it is possible to seal the planned sealing portion 91 while effectively preventing unintended wrinkles from occurring in the planned sealing portion 91.

[Cooling seal part]
FIG. 8 is a diagram showing an outline of a lateral sectional configuration of the cooling seal portion 22.

  The illustrated cooling seal portion 22 has a structure similar to that of the heating seal portion 21 described above, but does not include a heat generating means (that is, the heater wire 46 and the heater heat source 47 (see FIG. 5)).

  The cooling seal portion 22 includes a cooling portion 64 that cools at least a part of the planned sealing portion 91 and a chuck closing portion 65 that closes the chuck portion 92.

[Cooling part]
The cooling unit 64 is provided at the ninth station S9 on the downstream side of the eighth station S8 where the seal unit 41 is provided. After the planned sealing portion 91 is heated by the sealing portion 41, at least a part of the planned sealing portion 91 is cooled by the cooling portion 64, whereby the sealing strength of the planned sealing portion 91 is secured.

  The cooling unit 64 is provided so as to be capable of reciprocating in the horizontal direction (particularly in the thickness direction), and can be arranged at the cooling retreat position and the cooling contact position. The cooling part 64 arranged at the cooling retreat position is separated from the planned sealing part 91 of the bag 90. The cooling unit 64 arranged at the cooling contact position comes into contact with the planned sealing portion 91.

  The illustrated cooling unit 64 has a first cooling plate 66 and a second cooling plate 67. Each of the first cooling plate 66 and the second cooling plate 67 extends in the horizontal direction (particularly in the width direction) and has a size equal to or larger than the portion to be sealed 91 of the bag 90 in the width direction. Each of the illustrated first cooling plate 66 and second cooling plate 67 cools the entire planned sealing portion 91 heated by the sealing portion 41.

  Each of the 1st cooling plate 66 and the 2nd cooling plate 67 is comprised by the plate member excellent in heat conductivity. The illustrated first cooling plate 66 and second cooling plate 67 have substantially the same temperature as the ambient temperature, and by contacting the planned sealing portion 91 having a temperature higher than the environmental temperature, heat is absorbed and the planned sealing portion 91 is reached. To cool. The first cooling plate 66 and the second cooling plate 67 may be actively cooled by a cooling device (not shown) and have a temperature lower than the ambient temperature.

  The first cooling plate 66 is fixedly attached to the first cooling advancing / retreating shaft 71 via the first cooling plate holding block 68. The second cooling plate 67 is fixedly attached to the second cooling advancing / retreating shaft 72 via the second cooling plate holding block 69. The first cooling plate 66 is attached to the first cooling plate holding block 68 via a heat insulating member (not shown), and the second cooling plate 67 is connected to the second cooling plate holding block via a heat insulating member (not shown). It is attached to 69.

  The first cooling advancing / retreating shaft 71 and the second cooling advancing / retreating shaft 72 are reciprocally moved in the horizontal direction (particularly the thickness direction) by a driving unit (not shown). Specifically, the first cooling plate holding block 68 and the second cooling plate 68 are arranged on the basis of the position of the bag holding portion 11 arranged at the ninth station S9 (that is, the portion of the bag 90 sandwiched by the bag holding portions 11). The plate holding block 69 is symmetrically reciprocated in the horizontal direction. The drive unit that drives the first cooling advancing / retreating shaft 71 and the second cooling advancing / retreating shaft 72 may be controlled by a control unit (not shown).

  The first cooling plate 66 and the second cooling plate 67 are provided so as to face each other in the horizontal direction (particularly the thickness direction). With the horizontal movement of the first cooling advancing / retreating shaft 71 and the second cooling advancing / retreating shaft 72 (that is, the horizontal movement of the first cooling plate holding block 68 and the second cooling plate holding block 69), the first cooling plate 66 and the first cooling plate 66 The two cooling plates 67 are horizontally moved symmetrically so as to approach each other and move away from each other, and are arranged at the cooling contact position and the cooling retreat position.

  When the cooling unit 64 is arranged at the cooling contact position, the pre-sealing portion 91 is sandwiched by the first cooling plate 66 and the second cooling plate 67 and pressure is applied.

  On the other hand, when the cooling unit 64 is arranged at the cooling retreat position (see FIG. 8), the first cooling plate 66 and the second cooling plate 67 are not in contact with the planned sealing portion 91, and the planned sealing portion 91 is the first No force is received from the cooling plate 66 and the second cooling plate 67.

[Chuck closure part]
The chuck closing part 65 closes the chuck part 92 with the chuck part 92 interposed therebetween.

  The illustrated chuck closing portion 65 has a first chuck closing body 75 and a second chuck closing body 76.

  The first chuck closing body 75 is a plate-shaped member extending in the width direction (direction perpendicular to the paper surface of FIG. 8). The first chuck closing body 75 is made of, for example, stainless steel, and basically does not expand or contract even when a force is applied.

  The second chuck closing body 76 is a member extending in the width direction, and is provided so as to be capable of expanding and contracting in the thickness direction (left and right direction in FIG. 8). The illustrated second chuck closing body 76 has a closing advancing / retreating portion 76a, a closing support portion 76b, and a closing urging portion 76c.

  The closing advancing / retreating portion 76a is provided so as to be movable in the thickness direction, and particularly moves according to the force applied toward the closing supporting portion 76b. The closing support portion 76b is fixed to the second chuck attaching portion 74, and holds the closing advancing / retreating portion 76a movably in the thickness direction. The closing urging portion 76c is configured by a compression elastic body (for example, a compression spring) arranged between the closing advancing / retreating portion 76a and the closing supporting portion 76b, and is configured to be close to each other with respect to the closing advancing / retreating portion 76a and the closing supporting portion 76b. Apply elastic force in the direction away from. By applying a force to the closing advancing / retreating portion 76a to bring the closing advancing / retreating portion 76a closer to the closing support portion 76b so as to resist the elastic force of the closing biasing portion 76c, the second chuck closing body 76 contracts in the thickness direction as a whole.

  The first chuck closing body 75 is fixed to the first cooling plate holding block 68 via the first chuck mounting portion 73. The second chuck closing body 76 (particularly the closing support portion 76 b) is fixed to the second cooling plate holding block 69 via the second chuck attachment portion 74. Therefore, the first chuck closing body 75 is fixedly attached to the first cooling advancing / retreating shaft 71 via the first chuck mounting portion 73 and the first cooling plate holding block 68, and the first cooling advancing / retreating shaft 71. Together with this, it moves horizontally (especially in the thickness direction). The second chuck closing body 76 is fixedly attached to the second cooling advancing / retreating shaft 72 via the second chuck mounting portion 74 and the second cooling plate holding block 69, and is horizontal with the second cooling advancing / retreating shaft 72. Direction (especially thickness direction).

  The first chuck closing body 75 and the second chuck closing body 76 (particularly the closing advancing / retracting portion 76a) are provided so as to face each other in the horizontal direction (particularly the thickness direction). Along with the horizontal movement of the first cooling advancing / retreating shaft 71 and the second cooling advancing / retreating shaft 72 (that is, the horizontal movement of the first cooling plate holding block 68 and the second cooling plate holding block 69), the first chuck closing body 75 and The second chuck closing bodies 76 are symmetrically moved in the horizontal direction so as to approach each other and move away from each other, and are disposed at the chuck contact position and the chuck retreat position.

  When the first chuck closing body 75 is arranged at the chuck retracted position, the illustrated first chuck closing body 75 is slightly retracted from the first cooling plate 66, and the first cooling plate 66 is the first chuck closing body 75. It protrudes toward the bag 90 side (that is, the second cooling plate 67 side).

  When the second chuck closing body 76 is arranged at the chuck retreat position, the second chuck closing body 76 projects toward the bag 90 side (that is, the first chuck closing body 75 side) from the second cooling plate 67, and The cooling plate 67 is retracted more than the second chuck closing body 76.

  In the eighth station S8, the planned sealing portion 91 has already been heat-sealed. Therefore, in the ninth station S9, the overall size of the chuck portion 92 in the thickness direction (the horizontal direction in FIG. 8) is larger than that of the scheduled sealing portion 91. Therefore, in the process of the first cooling plate holding block 68 and the second cooling plate holding block 69 moving toward each other, the first chuck closing body 75 is moved to the front side wall portion 96 (particularly the first cooling plate holding body 75) prior to the first cooling plate 66. The second chuck closing body 76 contacts the back side wall portion 97 (particularly the portion corresponding to the second chuck body 92b) prior to the second cooling plate 67.

  Then, with the first chuck closing body 75 and the second chuck closing body 76 in contact with the front side wall portion 96 and the back side wall portion 97, the first cooling plate holding block 68 and the second cooling plate holding block 69 are further separated from each other. The first cooling plate 66 comes into contact with the front side wall portion 96, and the second cooling plate 67 comes into contact with the back side wall portion 97 by moving so as to approach. At this time, the first chuck closing body 75 and the second chuck closing body 76 apply forces to each other via the bag 90 (particularly the chuck portion 92), so that the first chuck body 92a and the second chuck body 92b are engaged. To be done. Further, the closing urging portion 76c is compressed, the closing advancing / retracting portion 76a approaches the closing supporting portion 76b, and the planned sealing portion 91 is sandwiched by the first cooling plate 66 and the second cooling plate 67 and pressure is applied.

  As described above, in the process in which the first cooling plate holding block 68 and the second cooling plate holding block 69 move toward each other, the first chuck body 92a and the second chuck body 92b are engaged with each other, and the sealing target portion is formed. 91 is sandwiched between the first cooling plate 66 and the second cooling plate 67 and cooled.

[Seal method]
Next, an example of a sealing method performed by the above-described sealing device 40 (heating sealing section 21 and cooling sealing section 22) will be described.

  In the packaging system 10 (see FIG. 1), the bag 90 held by the bag holding unit 11 circulates from the first station S1 to the seventh station S7, and undergoes corresponding processing at each station. After that, the bag 90 is placed in the eighth station S8 together with the corresponding bag holder 11. The bag 90 arranged in the eighth station S8 contains the contents, but the mouth portion 93 is not sealed.

  In the eighth station S8, the heat sealing process is performed by the heat sealing unit 21 to seal the mouth portion 93. Specifically, the bag 90 arranged at the eighth station S8 is pulled in the width direction by the bag holding portion 11 and is made tense. This tensioning step may be omitted if the bag 90 has already been properly tensioned when it is placed in the eighth station S8. Then, the pressing portion 42 is brought into contact with the portion of the bag 90 between the planned sealing portion 91 and the chuck portion 92. That is, the first heating advancing / retreating shaft 53 and the second heating advancing / retreating shaft 54 are driven so that the portion of the bag 90 between the planned sealing portion 91 and the chuck portion 92 has the first pressing body 55 and the first pressing body 55 included in the pressing portion 42. 2 It is sandwiched by the pressing body 56.

  Then, in the state where the pressing portion 42 is in contact with the portion between the planned sealing portion 91 and the chuck portion 92, the sealing portion 41 is brought into contact with the planned sealing portion 91, and the sealing portion 41 closes the planned sealing portion 91. By heating, the planned sealing portion 91 is sealed. That is, the first heating advancing / retreating shaft 53 and the second heating advancing / retreating shaft 54 are driven, and the scheduled seal portion 91 is sandwiched by the first seal body 44 and the second seal body 45 of the seal portion 41, and pressure is applied. Be heated.

  At this time, as shown in FIGS. 6 and 7, since the first pressing body 55 and the second pressing body 56 having the elastic body are elastically deformed, the movement of the seal portion 41 is not hindered by the pressing portion 42, The seal portion 41 can appropriately sandwich the seal portion 91.

  Thus, before the seal portion 41 is pressed against the planned seal portion 91, the pressing portion 42 contacts the portion of the bag 90 between the planned seal portion 91 and the chuck portion 92. Therefore, before the bag 90 is brought into contact with the seal portion 41 (that is, before the seal target portion 91 of the bag 90 is heat-sealed by the seal portion 41), the bag 90 between the seal target portion 91 and the chuck portion 92. Is held by the pressing portion 42. As a result, the gap between the front side wall portion 96 and the back side wall portion 97 above the portion of the bag 90 sandwiched by the holding portions 42 is reduced, and the posture of the sealing target portion 91 is the standing posture or the standing posture. Is corrected to a posture close to. Therefore, the planned sealing portion 91 seals the planned sealing portion 91 whose posture is corrected. As a result, it is possible to effectively prevent the generation of wrinkles due to the sealing process.

  After the heat sealing of the scheduled sealing portion 91 is completed, the first heating advancing / retreating shaft 53 and the second heating advancing / retreating shaft 54 are driven so that the first seal body holding block 51 and the second seal body holding block 52 move away from each other, and The part 41 and the pressing part 42 are separated from the bag 90.

  After that, the bag 90 is moved together with the bag holding unit 11 from the eighth station S8 to the ninth station S9.

  As described above, after the scheduled seal portion 91 is heat-sealed by the seal portion 41 in the eighth station S8, the scheduled seal portion 91 is heated by the first cooling plate 66 and the second cooling plate 67 of the cooling unit 64 in the ninth station S9. It is sandwiched and at least a part of the planned sealing portion 91 is cooled. Further, at the ninth station S9, the chuck portion 92 is closed by the chuck closing portion 65.

  After that, the bag 90 is moved together with the bag holding unit 11 from the ninth station S9 to the tenth station S10, and is sent to the subsequent stage by the product bag discharging conveyor 23.

  As described above, according to the sealing device 40 and the sealing method shown in the drawings, the bag portion 90 is melted by the pressing portion 42 having a temperature substantially equal to the ambient temperature coming into contact with the portion of the bag 90 in the vicinity of the planned sealing portion 91. Instead, the gap between the front side wall portion 96 and the back side wall portion 97 can be reduced. As a result, the planned sealing portion 91 can be sealed while suppressing the occurrence of wrinkles in the planned sealing portion 91 of the bag 90 having the chuck portion 92.

  The inventor of the present invention actually manufactured the sealing device 40 of this embodiment, and sealed the planned sealing portions 91 of the plurality of bags 90 according to the above-described sealing method. As a result, almost no wrinkles were visually observed in the sealing target portion 91 of the bag 90 sealed by the sealing device 40 and the sealing method of the present embodiment.

  Further, by using the pressing portion 42 including the elastic body, the bag 90 can be properly sandwiched by the pressing portion 42 without damaging the bag 90. In particular, even when the thickness of the bag 90 changes like a gusset bag, the pressing portion 42 can appropriately and reliably sandwich the bag 90 by utilizing the elastic deformation of the elastic body.

  Further, the portion that comes into contact with the holding portion 42 arranged at the holding contact position (that is, the portion between the planned sealing portion 91 and the chuck portion 92) is narrower than the chuck portion 92 and the chuck closing portion 65 in the width direction. Therefore, the gap between the front side wall portion 96 and the back side wall portion 97 can be efficiently reduced by the relatively small presser portion 42, and the posture of the sealing target portion 91 can be corrected.

[Modification]
The present invention is not limited to the above-mentioned embodiments and modifications. For example, various modifications may be added to each element of the above-described embodiments and modifications, and the constituent elements of one embodiment and the constituent elements of other embodiments may be appropriately combined.

  Although the pressing portion 42 of the above-described embodiment contacts only a part of the bag 90 in the width direction, the pressing portion 42 may contact the entire bag 90 in the width direction. The bag 90 may be sandwiched by the pressing portions 42 (the first pressing body 55 and the second pressing body 56) having a size larger than the bag 90 in the width direction (see the reference numeral "42 '" in FIGS. 2 and 3).

  Further, although the sealing device 40 of the above-described embodiment adopts a sealing system that combines heating and cooling, the sealing device 40 may employ another sealing system. For example, the sealing device 40 may employ a sealing method in which only heating is performed, the cooling portion 64 may not be provided, and the heat-sealed sealing target portion 91 may be naturally cooled. Further, the sealing device 40 may adopt a sealing method using ultrasonic waves. Further, in the above-described embodiment, the seal portion 41 is always kept in the heated state during the operation of the seal device 40, but an impulse seal system in which the seal portion 41 is instantaneously heated may be adopted. When the impulse sealing method is adopted, the timing at which the sealing portion 41 contacts the bag 90 and the timing at which the bag 90 is heated and sealed may not match. Even in such a case, it is preferable that the pressing portion 42 contact the bag 90 before the seal portion 41 contacts the bag 90. The sealing portion 41 comes into contact with the sealing target portion 91 to perform the sealing process in a state where the portion of the bag 90 near the sealing target portion 91 is supported by the pressing portion 42, and thus the sealing target portion 91 accompanying the sealing process is performed. It is possible to effectively prevent wrinkles from being generated.

  Further, the step of closing the chuck portion 92 is performed at the same time as the cooling and sealing step in the ninth station S9 in the above-described embodiment, but if the contents are stored in the bag 90, the chuck is performed at any timing. The part 92 may be closed. Before closing the planned sealing portion 91 of the bag 90, while sealing the planned sealing portion 91 of the bag 90, or after sealing the planned sealing portion 91 of the bag 90, a step of closing the chuck portion 92 is performed. You can In the packaging system 10 of FIG. 1, the step of closing the chuck portion 92 may be performed at any timing while the bag 90 is being transported through the sixth station S6 to the tenth station S10. Further, the step of closing the chuck portion 92 may not be performed, and the chuck portion 92 may be sent to the subsequent stage from the packaging system 10 in the opened state.

  Further, in the above-described embodiment, the flat bag (see FIG. 2) and the gusset bag (see FIGS. 3A and 3B) are illustrated as the bag 90, but the bag 90 may have other forms. For example, the bag 90 may have a structural portion other than the gusset portion 98, and the thickness of the bag 90 may be different between the location where the structural portion is provided and the location where the structural portion is not provided.

  Further, the conveyance of the bag 90 by the rotary table 12 and the operation of the devices (including the sealing device 40) included in the packaging system 10 may be correlated with each other under the control of a controller (not shown).

  Further, the effects produced by the present invention are not limited to the above-described effects, and unique effects according to the specific configurations of the respective embodiments can be exhibited. As described above, various additions, changes and partial deletions can be made to each element described in the claims, the description, the abstract and the drawings without departing from the technical idea and gist of the present invention. Is.

10 packaging system, 11 bag holding unit, 12 rotary table, 13 rack, 14 conveyor magazine, 15 printing device, 16 printing inspection device, 17 opening device, 18 content loading device, 19 defect detection device, 20 defective bag discharging device, 21 heating seal part, 22 cooling seal part, 23 product bag discharging conveyor, 40 sealing device, 41 sealing part, 42 pressing part, 44 first sealing body, 45 second sealing body, 46 heater wire, 47 heater heat source, 51st DESCRIPTION OF SYMBOLS 1 seal body holding block, 52 2nd seal body holding block, 53 1st heating advancing / retreating shaft, 54 2nd heating advancing / retreating shaft, 55 1st pressing body, 56 2nd pressing body, 57 1st pressing holding part, 58 2nd Press-holding part, 59 First press-fitting part, 60 Second press-fitting part, 64 Cooling part, 65 Chuck closing part, 66 1 cooling plate, 67 2nd cooling plate, 68 1st cooling plate holding block, 69 2nd cooling plate holding block, 71 1st cooling advancing / retreating shaft, 72 2nd cooling advancing / retreating shaft, 73 1st chuck attachment part, 74 2nd Chuck mounting part, 75 1st chuck closing body, 76 2nd chuck closing body, 91 Sealing part, 92 Chuck part, 93 mouth part, 94 bottom part, 95 side part, 96 front side wall part, 97 back side wall part, 98 gusset Part, S1 1st station, S2 2nd station, S3 3rd station, S4 4th station, S5 5th station, S6 6th station, S7 7th station, S8 8th station, S9 9th station, S10 10th station

Claims (10)

A step of bringing a pressing portion into contact with a portion of the bag having a planned sealing portion and a chuck portion between the planned sealing portion and the chuck portion;
In the state where the pressing portion is in contact with the portion between the planned sealing portion and the chuck portion, the planned sealing portion is sandwiched by the first seal body and the second seal body to seal the planned sealing portion. And a sealing method including a step.   In the step of bringing the pressing part into contact with the part between the planned sealing part and the chuck part, the part between the planned sealing part and the chuck part is a first pressing body included in the pressing part. The sealing method according to claim 1, wherein the sealing member is sandwiched by the second pressing body. The step of sealing the planned sealing portion includes
A step of heating at least one of the first seal body and the second seal body in a state where the first seal body and the second seal body are in contact with the planned seal portion When,
The step of contacting a cooling portion with the planned sealing portion to cool the planned sealing portion after heating the planned sealing portion by at least one of the first seal body and the second seal body. Or the sealing method according to 2.   The sealing method according to claim 1, further comprising closing the chuck portion. A sealing device for sealing a planned sealing portion of a bag having a chuck portion,
A first seal body and a second seal body that seal the planned sealing portion in a state of contacting the planned sealing portion, and a seal retreat position separated from the planned sealing portion and a seal contact position contacting the planned sealing portion. A first seal body and a second seal body that can be arranged in
A holding and retracting position arranged at a position apart from a portion between the planned sealing portion and the chuck portion of the bag, and a position in contact with the portion between the planned sealing portion and the chuck portion. A pressing contact position to be arranged and a pressing part that can be arranged at,
In the first seal body and the second seal body, the planned seal part is sandwiched between the planned seal part and the chuck part with the pressing part in contact with the part. Sealing device for sealing.   The pressing part has a first pressing body and a second pressing body, and when the pressing part is arranged at the pressing contact position, the part between the pre-sealing part and the chuck part is the first pressing part. The sealing device according to claim 5, which is sandwiched between a body and the second pressing body. Further comprising a cooling unit for cooling the planned seal portion,
At least one of the first seal body and the second seal body heats the planned sealing portion to seal the planned sealing portion,
The cooling unit contacts the scheduled seal portion and cools the scheduled seal portion after the scheduled seal portion is heated by at least one of the first seal body and the second seal body. Item 5. The sealing device according to item 5 or 6.   The sealing device according to any one of claims 5 to 7, further comprising a chuck closing portion that sandwiches the chuck portion and closes the chuck portion. The pressing portion has an elastic body,
The seal according to any one of claims 5 to 8, wherein when the pressing portion is arranged at the pressing contact position, the elastic body comes into contact with the portion between the planned sealing portion and the chuck portion. apparatus. The chuck portion extends in the width direction,
The portion to be sealed extends in the width direction,
10. The portion between the pre-sealing portion and the chuck portion, which comes into contact with the holding portion arranged at the holding contact position, is narrower in width direction than the chuck portion. Sealing device according to.