JP2011230457A - Sealing device for bag making machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the deterioration and deformation of a resin film comprising a part etc. of an intermediate material of a container positioned above a heat sealing part during the standby of a bag making machine.SOLUTION: A spout joint 32 of a spout attaching unit 18 includes: a heat shielding member 42 for shielding hot air rising from the heat sealing part side by moving between the intermediate material 28 of the container where a spout 110 is inserted in a spout attaching hole and the heat sealing part 36 during the standby state of the unit 18; and a blower 62 for generating a descending current toward the heat shielding member 42 into space 70 between the bottom surface of an upper support member 34 and the heat shielding member 42 during the standby state of the unit 18.

Description

  The present invention relates to a sealing device for a bag making machine, and in particular, a bag making machine for heat-sealing a spout with a flange to a container intermediate material in a bag making machine for producing a plurality of pouch containers using a sheet-like resin film packaging material. The present invention relates to a sealing device.

  To create a bag-like container, etc., from a sheet-like resin film packaging material, the sheet-like resin film packaging material is folded in an appropriate order, and necessary portions are joined by heat sealing or the like. In order to attach a member or the like and to obtain an appropriate external shape, the corners are cut and then cut into individual containers. A machine that manufactures a bag-like container by performing these steps in order is called a bag-making machine or the like.

  For example, in Patent Document 1, as a method for manufacturing a pouch container with a spout, when a resin film packaging material is delivered from a packaging material delivery unit, a plurality of crease lines are formed in the crease line formation unit, Along the crease line, a part corresponding to the body part of the pouch (hereinafter referred to as a part corresponding to the body part), a part corresponding to the top gusset part (hereinafter referred to as a part corresponding to the top gusset part), and a part corresponding to the bottom gusset part (hereinafter referred to as part) , Referred to as a bottom gusset equivalent portion). Then, a spout is attached to the top gusset equivalent part, and in that state, the peripheral parts of the body equivalent part, the top gusset equivalent part and the bottom gusset equivalent part are heat-sealed, and then placed in individual pouch containers. It is described to separate and cut.

International Publication WO2008 / 096392A1

  In manufacturing the pouch container with a spout, when a spout is attached to the top gusset equivalent part, a spout with a flange is inserted into a spout attachment hole formed in advance in the top gusset equivalent part before reaching the folding part, and The end portion of the heated cylindrical heat seal member is pressed against the flange portion of the spout through the peripheral portion of the spout mounting hole, so that the spout is heat sealed and attached to the portion corresponding to the top gusset portion. .

  Thus, in the spout mounting unit that mounts the spout on the top gusset equivalent part of the pouch container, the heat seal member is moved up from below while supporting the spout from above and brought into contact with the peripheral edge of the spout mounting hole There is. In such a configuration, when the bag making machine including the spout mounting unit is in a standby state after the production is temporarily stopped, for example, at the lunch break time of the operator, the bag making machine is positioned above the heat seal member that is heated to a predetermined temperature. The part of the pouch container will continue to be exposed to the rising hot air heated by the heat seal member. Then, although depending on the duration of the standby time, there is a problem that the resin film constituting the portion corresponding to the top gusset that is stopped above the heat seal member is altered or deformed and becomes a useless portion that cannot be used as a product. there were.

  In order to deal with the above problems, when the bag making machine is in a standby state, it is conceivable that the heat seal member is retreated to a lower position further away from the resin film constituting the top gusset equivalent part or the like. However, in this case, there arises a problem that the vertical movement stroke of the heat seal member becomes longer and the apparatus becomes larger.

  On the other hand, it is conceivable as another countermeasure to temporarily reduce the temperature of the heat seal member when the bag making machine enters a standby state. However, in this case, since it takes time for the heat seal member to rise to a predetermined temperature when the operation is resumed, the bag making machine cannot be operated until then, leading to a reduction in production efficiency.

  Therefore, the object of the present invention is to change the quality of the resin film constituting the top gusset equivalent part located above the heat seal member even during standby of the bag making machine without causing an increase in the size of the apparatus or a decrease in production efficiency. An object of the present invention is to provide a sealing device for a bag making machine that can prevent the above.

  A sealing device for a bag making machine according to the present invention is a sealing device for a bag making machine that heat seals a spout with a flange to a container intermediate material in a bag making machine that manufactures a plurality of pouch containers using a sheet-like resin film packaging material. The upper part is disposed above the container intermediate member in which the spout is inserted into the spout mounting hole, and supports the spout on the lower surface when heat-sealing the peripheral part of the spout mounting hole to the flange part of the spout. A support member and a spout mounting hole provided in a flange portion of the spout when the support member is disposed below the upper support member so as to be movable up and down relative to the upper support member and heated by a heater. A heat seal part for heat-sealing the peripheral part of the spout, and when the seal device is in a standby state, a spout is inserted into the spout mounting hole. A heat shielding member that moves between the intermediate material and the heat seal portion and shields hot air rising from the heat seal portion side; and a lower surface of the upper support member when the seal device is on standby. And a descending airflow generating means for generating a descending airflow toward the heat shielding member in a space between the shielding members.

  According to this configuration, since the hot air rising from the heat seal portion side is blocked by the heat shielding member when the sealing device is on standby, the container intermediate material stopped above the heat seal portion is exposed to the hot air. Therefore, the container intermediate material in the sealing device can be prevented from being altered or deformed. In addition, when the sealing device is in a standby state, a downward air flow toward the heat shielding member is generated by the downward air flow generating means in the space between the lower surface of the upper support member and the shielding member. The effect of preventing the above can be made more effective.

  In the sealing device of the bag making machine according to the present invention, the descending airflow generating means is provided on both sides along the container intermediate material that is continuously conveyed, and both side partition walls that partition the space as a chamber, and an upper portion of the chamber And a blower that blows air into the room.

  According to this configuration, the air is blown into the room partitioned by the both side partition walls by the blower, so that the room becomes positive pressure and the air escapes from the lower gaps of the both side partition walls, so that the heat shielding is performed during the standby of the sealing device. A downflow toward the upper surface of the member, that is, a downward airflow can be effectively generated.

  Moreover, in the sealing device of the bag making machine according to the present invention, the descending airflow generating means is provided on both sides along the container intermediate material that is continuously conveyed, and both side partition walls that partition the space as a chamber, and the chamber By applying a negative pressure to the chamber from below, air taken in from the upper opening of the chamber can effectively generate a downward air flow toward the upper surface of the heat shielding member during standby of the sealing device. .

  According to this configuration, the heat shielding is performed during standby of the sealing device by applying a negative pressure from below to the chamber partitioned by the both side partition walls and taking in air from the upper opening of the chamber. A descending airflow toward the upper surface of the member can be effectively generated.

  Furthermore, in the sealing device of the bag making machine according to the present invention, when the sealing device is in a standby state, the heat shielding member is provided from the heat seal portion with respect to a portion of the container intermediate material that becomes a trunk portion of the pouch container. It is preferable to shield the radiant heat.

  According to this configuration, when the sealing device is on standby, it is possible to effectively prevent the portion that becomes the body portion of the pouch container from being deteriorated by radiant heat from the heat seal portion.

  According to the sealing device of the bag making machine according to the present invention, the container intermediate material portion located above the heat seal part during the standby of the bag making machine, etc. without causing an increase in the size of the device or a decrease in production efficiency. Alteration and deformation of the resin film to be formed can be prevented.

It is a figure which shows schematic structure of the bag making machine with which the spout mounting | wearing unit of one embodiment (henceforth this embodiment) of this invention is applied. It is a three-plane figure which shows the example of the pouch container manufactured with the bag making machine of FIG. It is a perspective view of the pouch container of FIG. It is a front view which shows the spout mounting unit of this embodiment in the state which excluded the front partition wall and the air blower. It is the side view which looked at the spout mounting unit of Drawing 4 from the direction of arrow A, (a) shows signs that the spout mounting unit is in operation and is in a non-seal state, and (b) is a seal in which the spout mounting unit is in operation. Shows the state. It is a figure which shows a mode that the spout mounting unit is waiting and the heat-shielding member is pulled out above the heat seal part. FIG. 7 is an enlarged top view of FIG. 6.

  Embodiments according to the present invention will be described below in detail with reference to the accompanying drawings. In this description, specific shapes, materials, numerical values, directions, and the like are examples for facilitating the understanding of the present invention, and can be appropriately changed according to the application, purpose, specification, and the like.

  FIG. 1 shows a schematic configuration of a bag making machine 10 according to an embodiment of the present invention. The bag making machine 10 includes a reel unit 12 around which a resin film packaging material (hereinafter, simply referred to as a packaging material) that is a heat-sensitive adhesive sheet of a raw material is wound, and a buffer mechanism for feeding the packaging material An accumulator unit 14, a folding device 16 for folding the packaging material, a spout mounting unit (seal device) 18 for supplying and attaching the spout to the folded packaging material, a portion corresponding to the top gusset of the packaging material with spout, and a trunk portion A joining unit 20 for joining a portion and a portion corresponding to the bottom gusset, a corner cutting device 21 for cutting the top gusset portion, a boundary between the portion corresponding to the top gusset and the portion corresponding to the body, and the bottom corresponding to the set corresponding portion and the body portion Separation and cutting unit for separating point joint 22 for joining the boundary with the part and individual pouch container with spout Configured to include a 4.

  In the following drawings, the X, Y, and Z directions orthogonal to each other are shown in order to indicate from which direction the illustrated content is viewed. Here, the X direction is the packaging material conveyance direction, and the Z direction is the vertical direction of the bag making machine 10, that is, the direction perpendicular to the installation floor. This installation floor is a plane parallel to the XY plane. The Y direction is the direction from the near side to the far side of the page in the case of FIG.

  Before describing the spout mounting unit 18, the pouch container 100 with a spout manufactured by the bag making machine 10 will be described with reference to FIGS. 2 and 3. The pouch container 100 with a spout is a bag-like container provided with a pouch 102 that is a container main body and a spout 110 that is an inlet / outlet of container contents.

  The pouch 102 is formed by folding a single sheet-like packaging material a plurality of times by a folding device 16 to form a body portion 104, a top gusset portion 106, and a bottom gusset portion 108 below the body portion 104. The As shown in FIG. 2, the bottom gusset portion 108 is a folding portion that can ensure the swelling of the container. These peripheral portions are joined by heat sealing or the like so that the joining unit 20 forms one bag-like container.

  The spout 110 includes a spout main body portion 112 that is a cylinder, and a flange portion 114 that is provided at a lower portion of the spout main body portion 112. After the spout body portion 112 is inserted into the spout mounting hole formed in the top gusset portion 106, the flange portion 114 and the peripheral portion of the spout mounting hole are joined by heat sealing, and the spout 110 is integrated with the pouch 102. Attached to. In FIG. 2 and FIG. 3, a portion joined by heat sealing or the like is shown as a joint 120 as a dotted line. Next, the spout mounting unit 18 for mounting the spout 110 on the top gusset portion 106 will be described in detail with reference to FIGS. 4 and 5.

  FIG. 4 is a front view showing the spout mounting unit 18 of the present embodiment. In FIG. 4, the container intermediate member 28 made of a continuous resin film bent body is intermittently conveyed in the direction of the arrow X. FIG. 5 is a side view of the spout mounting unit 18 of FIG. 4 as viewed from the direction of arrow A. FIG. 5A shows the spout mounting unit 18 in operation and in an unsealed state, and FIG. The state where the spout mounting unit 18 is in operation and is in a sealed state is shown. In addition, in FIG. 4, illustration of the air blower fixed to the upper support member 34 and a partition wall is abbreviate | omitted.

  As shown in FIG. 4, the spout mounting unit 18 includes a spout insertion part 30 and a spout joint part 32. In the spout insertion part 30, the spout body part 112 of the spout 110 is inserted from above into the spout mounting hole 26 formed in the top gusset equivalent part 29 of the container intermediate member 28. Accordingly, the spout 110 is held by the top gusset equivalent portion 29 in a state where the flange portion 114 is engaged with the peripheral edge portion of the spout mounting hole 26. Thereafter, the container intermediate member 28 is conveyed in the X direction by a predetermined length and transferred to the spout joint 32.

  The spout joint portion 32 includes an upper support member 34 and a heat seal portion 36 disposed so as to face the lower support member 34. The upper support member 34 is supported by a support column (not shown) provided upright on the spout mounting unit main body 19. The upper support member 34 has a flat lower surface 35, and the flange portion 114 of the spout 110 is supported by the lower surface 35 when the flange portion 114 is heat sealed to the top gusset equivalent portion 29 by the heat seal portion 36. Is to do.

  The heat seal part 36 has a cylindrical heat seal member 38 and is heated to a temperature suitable for heat seal by a built-in heater (not shown). In the spout joint portion 32 of the present embodiment, three heat seal portions 36 are arranged along the X direction at equal intervals corresponding to the formation pitch of the spout mounting holes 26. However, in the present invention, the number of heat seal portions is not limited to three, but may be one or two, or four or more heat seal portions may be arranged in a plurality of rows. Good.

  Each heat seal part 36 is integrally installed on the gantry 40, and is configured to move up and down in the + Z direction or the −Z direction with respect to the upper support member 34 together with the gantry 40. 4 and 5, the mechanism for driving the gantry 40 up and down is not shown.

  Further, when the bag making machine 10 including the spout attachment unit 18 is in a standby state, the spout joint portion 32 moves between the container intermediate member 28 in which the spout 110 is inserted into the spout attachment hole 26 and the heat seal portion 36. And the heat shielding member 42 which shields the hot air rising from the heat seal part 36 side is further provided. The heat shielding member 42 can be suitably configured by a material having flexibility and heat resistance. Further, the heat shield member 42 has a width in the X direction that can cover the top of the three heat seal portions 36.

  One end or lower end of the heat shielding member 42 is connected to the upper end of an elastic member 44 such as a coil spring. A lower end portion of the elastic member 44 is connected to a fixing member 46 fixed to the spout mounting unit main body portion 19. On the other hand, a plurality of (four in this embodiment) strip-like or string-like narrow members 48 are connected to the other end or upper end of the heat shielding member 42. The narrow member 48 can be suitably configured by a material having flexibility and heat resistance, like the heat shielding member 42.

  It should be noted that the elastic member 44 may be another elastic member such as a torsion spring, a leaf spring, or rubber instead of the coil spring.

  Two support bars 50 and 52 are installed obliquely above the heat seal portion 36. The support bars 50 and 52 are arranged along the X direction in parallel to each other at intervals that do not interfere with the heat seal portion 36 that moves up and down, and are fixed to the spout mounting unit main body 19 via a support member (not shown). ing.

  The narrow member 48 having one end connected to the heat shielding member 42 is stretched over the support bars 50 and 52, and the other end is connected to the drive rod 56 of the air cylinder 54 which is a drive actuator. The drive bars 58 are respectively connected. The two narrow members 48 located in the middle of the four narrow members 48 are formed at positions that do not interfere with the heat seal portion 36 that moves up and down, that is, between the three heat seal portions 36. They are arranged at positions corresponding to two gaps.

  The air cylinder 54 is fixed to the spout mounting unit main body 19 and is connected to a compressed air supply pipe 60. When compressed air is supplied via the compressed air supply pipe 60, the drive rod 56 is drawn and the drive bar 58 moves downward while maintaining a horizontal state.

  As shown in FIG. 5A, a blower (downward air flow generating means) 62 is fixed to one side surface of the upper support member 34 via a bracket (not shown). A front partition wall (both side partition walls) 64 is attached to the blower 62. The front partition wall 64 is formed so as to hang down from the blower 62 and bend outward (that is, in the −Y direction) on the lower end side thereof. Thereby, an opening 66 is formed between the lower end portion of the front partition wall 64 and the support bar 50.

  On the other hand, a rear partition wall (both side partition walls) 68 is located in the middle of the container at a position facing the front partition wall 64 with a portion 29 corresponding to the top gusset of the container intermediate material 28 continuously conveyed below the upper support member 34 interposed therebetween. It is installed along the longitudinal direction of the material 28, that is, the X direction. The rear partition wall 68 is fixed by a support member (not shown) standing on the spout mounting unit main body 19 so as not to interfere with the container intermediate material 28 that is continuously conveyed. An opening 72 is formed between the lower end of the rear partition wall 68 and the support bar 52.

  Thus, the front and rear partition walls 64 and 68 installed on both sides of the top gusset equivalent portion 29 of the container intermediate member 28 are when the heat shield member 42 is pulled out above the heat seal portion 36 by the air cylinder 54. A chamber 70 formed of a space between the lower surface 35 of the upper support member 34 and the heat shielding member 42 is defined. The chamber 70 opens at both ends in the X direction and opens downward at the openings 66 and 72. Moreover, when the blower 62 provided in the upper part of the chamber 70 is driven, it blows into the chamber 70 obliquely from above, thereby generating a downdraft toward the upper surface of the heat shielding member 42 that has moved to the closed position. It is possible. Further, if shutters (not shown) are provided at both ends of the chamber 70 in the X direction and the opening of the chamber 70 is only the openings 66 and 68, the inside of the chamber 70 is made positive by a blower or the like to the heat shielding member 42. It is possible to generate the downflow toward the head more effectively.

  In the present embodiment, the partition walls 64 and 68 that partition the space between the lower surface 35 of the upper support member 34 and the heat shielding member 42 as the chamber 70 are provided. However, these partition walls are omitted and only the blower is provided. It is good also as a structure to provide.

  Next, the operation of the spout mounting unit 18 having the above configuration will be described. During operation in which the bag making machine 10 manufactures the pouch container 100, the cylindrical heat seal member 38 of the heat seal portion 36 is heated to a predetermined temperature by a heater.

  Then, when the container intermediate member 28 in which the spout 110 is inserted into the spout mounting hole 26 in the spout insertion portion 30 is transferred to the spout joint portion 32 and temporarily stopped, as shown in FIG. The part 36 moves up together with the gantry 40. Then, the upper end surface of the heat seal member 38 abuts or presses against the peripheral edge portion of the spout mounting hole 26 in a state where the spout body portion 112 of the spout 110 is accommodated in the heat seal member 38.

  At this time, the spout 110 is restricted and supported by the lower surface 35 of the upper support member 34 so that it cannot move upward. As a result, the peripheral portion of the spout mounting hole 26 is heat-sealed on the flange portion 114, and the spout 110 is mounted on the top gusset equivalent portion 29. When the heat seal part 36 moves up to the position shown in FIG. 5B, the narrow member 48 enters the gap between the heat seal parts 36, so that it does not interfere with the heat seal part 36.

  After heat sealing the spout 110 as described above, the heat sealing portion 36 moves downward to the original position shown in FIG. 5A to prepare for the next heat sealing of the spout 110.

  On the other hand, the operator of the bag making machine 10 may temporarily stop the operation of the bag making machine 10 and enter a standby state for a lunch break or the like. Thus, when the bag making machine 10 including the spout mounting unit 18 is in a standby state, compressed air is supplied to the air cylinder 54. As a result, the drive rod 56 is pulled in by the air cylinder 54, and the drive bar 58 moves downward by a predetermined distance.

  Then, the heat shielding member 42 is pulled out against the tensile force of the elastic member 44 through the narrow member 48 connected to the drive bar 58, and as shown in FIGS. 6 and 7, between the support bars 50 and 52. Is moved to a closed position covering the upper portion of the heat seal portion 36. Thereby, since the hot air heated by the heat seal part 36 is blocked by the heat shielding member 42, the top gusset equivalent portion 29 of the container intermediate material 28 is not exposed to the hot air. As a result, it is possible to reliably prevent the container intermediate material 28 from being altered or deformed by hot air in the spout mounting unit 18 during the standby of the bag making machine 10.

  In addition, when the bag making machine 10 enters a standby state, the blower 62 is driven. Then, a downward air flow is generated toward the upper surface of the heat shielding member 42 by being blown into the chamber 70 obliquely from above. Thereby, it can prevent more reliably that the hot air heated by the heat seal part 36 rises through the heat shielding member 42, and the effect of preventing the above-described alteration or the like of the container intermediate material 28 is further enhanced. Can be effective. Note that the air sent by the blower 62 is discharged out of the chamber 70 through openings 66 and 72 at the lower portion of the chamber 70 as shown by arrows in FIG.

  Furthermore, the heat shielding member 42 moved to the closed position can shield the radiant heat from the heat seal portion 36 with respect to the trunk-corresponding portion 28 a of the container intermediate material 28. Thereby, it can prevent effectively that the trunk | drum equivalent part 28a changes in quality by the radiant heat from the heat seal part 36, etc.

  When the standby state of the bag making machine 10 is released by the operation of the operator and the container manufacturing is resumed, the tension of the heat shielding member 42 by the air cylinder 54 is released. Thereby, the heat shielding member 42 returns to the position shown in FIG. 5A by the restoring force of the elastic member 44. At the same time, the driving of the blower 62 is stopped.

  The sealing device according to the present invention is not limited to the configuration of the spout joint portion 32 of the spout mounting unit 18 described above, and various changes and improvements can be made.

  For example, in the above description, the downdraft is generated by blowing air into the chamber 70 by the blower 62. However, instead of this, for example, a negative pressure operating means may be provided in the lower opening 72 of the chamber 70. Specifically, a fan as an air suction means is provided in the lower opening 72 and an upper opening is formed at the position of the blower 62 so that air is sucked from the chamber 70 to apply a negative pressure to the chamber 70. As a result, the descending airflow as described above may be generated by the air taken into the chamber 70 from the upper opening. In this case, in order to generate a negative pressure in the chamber 70, the effect is further increased by providing shutters at both ends of the chamber 70 in the X direction as described above.

  In the above description, the air cylinder 54 is used as an actuator for moving the heat shielding member 42 to the closed position when the bag making machine 10 enters the standby state. Instead, a pulley connected to the motor is used. The heat shielding member 42 may be moved by rotating and winding the narrow member 48.

  10 bag making machine, 12 reel unit, 14 accumulator unit, 16 folding device, 18 spout mounting unit (sealing device), 19 spout mounting unit main body, 20 joint unit, 21 corner cutting device, 22 point joint, 24 separation Cutting unit, 26 Spout mounting hole, 28 Container intermediate material, 28a Body equivalent part, 29 Top gusset equivalent part, 30 Spout insertion part, 32 Spout joint part, 34 Upper support member, 35 Lower surface, 36 Heat seal part, 38 Heat Seal member, 40 frame, 42 heat shielding member, 44 elastic member, 46 fixing member, 48 narrow member, 50, 52 support bar, 54 air cylinder, 56 drive rod, 58 drive bar, 60 compressed air supply pipe, 62 blower (Down airflow generating means), 64 forward finish Cut wall (both side partition walls), 66, 72 opening, 68 Rear partition wall (both side partition walls), 70 chambers, 100 pouch container, 102 pouch, 104 trunk, 106 top gusset part, 108 bottom gusset part, 110 spout 112 spout body, 114 flange, 120 joint.

Claims (4)

In a bag making machine for manufacturing a plurality of pouch containers using a sheet-like resin film packaging material, a sealing device for a bag making machine for heat-sealing a spout with a flange to a container intermediate material,
An upper support member that is disposed above a container intermediate member in which a spout is inserted into a spout mounting hole, and supports the spout on a lower surface when heat-sealing a peripheral portion of the spout mounting hole to a flange portion of the spout;
The container intermediate member is disposed so as to face the upper support member so as to be movable up and down with respect to the upper support member. A heat seal part for heat-sealing the peripheral edge of the spout mounting hole;
When the sealing device is in a standby state, the heat that moves between the heat seal part and the container intermediate material in which a spout is inserted into the spout mounting hole and shields the hot air rising from the heat seal part side A shielding member;
A downward air flow generating means for generating a downward air flow toward the heat shielding member in a space between the lower surface of the upper support member and the heat shielding member when the sealing device is in a standby state;
A sealing device for a bag making machine. The sealing device for a bag making machine according to claim 1,
The descending airflow generating means includes both side partition walls that are provided on both sides along the container intermediate material that is continuously conveyed to partition the space as a chamber, and a blower that is provided on the upper portion of the chamber and blows air into the chamber. A sealing device for a bag making machine, comprising: The sealing device for a bag making machine according to claim 1,
The descending airflow generating means is provided on both sides along the container intermediate material that is continuously conveyed, and both side partition walls that partition the space as a chamber, and by applying a negative pressure to the chamber from below the chamber. And a negative pressure acting means for generating the descending airflow by the air taken in from the upper opening of the chamber. In the sealing device of the bag making machine according to any one of claims 1 to 3,
When the sealing device is in a standby state, the heat shielding member shields radiant heat from the heat seal portion with respect to a portion of the container intermediate material that becomes a trunk portion of the pouch container. Sealing device.

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