JP4282318B2 - Heat sealing equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a heat seal device for heat-welding a portion to be closed such as a bag mouth portion of a packaging bag capable of accommodating a package such as a product.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as a packaging machine for packaging a product that is a package using a packaging film, a bag making and filling machine that sequentially conveys or fills a cylindrical packaging film and heat-seals the packaging film at positions before and after the product. Is widely used. FIG. 5 is a perspective view schematically showing an example of a horizontal pillow packaging machine as this type of bag making and filling machine. In the horizontal pillow packaging machine 40 shown in FIG. 5, the web-shaped packaging film Fw is guided from the film roll 41 by the guide roller 42, and is fed out by the feeding mechanism 43 including the driving roller 43a and the pressing roller 43b. The web-shaped packaging film Fw is sent to the former 44, formed into a cylindrical packaging film Ft in the former 44, and the product G as a package is fed into the cylindrical packaging film Ft by the supply conveyor 45. In association with the former 44, a paper drawing roller 46 for feeding the packaging film and a heat seal roller 47 for thermally welding both side edges of the packaging film are provided. An end sealer 48 in which heat seal bars 48 a and 48 b are arranged on the upper and lower sides is arranged on the downstream side of the former 44, and the end sealer 48 places the end seal at a position between the products G on the cylindrical packaging film Ft. 49 is applied. The operation of the end sealer 48 is shown as an example of reciprocating up and down, but is not limited to this, and operations such as rotation and box motion are possible. Moreover, the packaging film is cut within the formation range of the end seal 49 by a cutter incorporated in the end sealer 48 or a cutter disposed on the downstream side separately from the end sealer 48 to form individual bag packages P. It is also possible to separate them.
[0003]
By the way, in the case of recent bags and packages, not only when the products are different, the same products can be stored on the shelves and boxes according to the space available at the store and the way of appealing to consumers. The manner of display in stores is diversified, such as display in a manner such as arranging or stacking them in a store, or displaying in a state of being suspended on a hanging rod. When the packaging bags are arranged or stacked, as shown in FIG. 6 (a), the normal seal width dimensions W1 and W3 are provided as the heat seal portions 51 and 53 formed on the bag 50 of the bag package P1. Thus, the sealing is not impaired during the display. On the other hand, as shown in FIG. 6B, when the bag package P2 is suspended from the suspension rod 55, the suspension hole 54 is formed by drilling the upper heat seal portion 52. It is necessary to reinforce the seal by ensuring that the seal width dimension W2 of the heat seal part 52 is sufficiently wider than the normal seal width dimension W1 so that 54 does not weaken or break the seal of the heat seal part 52. It is. In this case, it is necessary to maintain the seal width dimension W3 for the lower heat seal portion 53.
[0004]
  On the other hand, from the viewpoint of a packaging machine, in order to obtain the heat seal portion 52 in which such a hanging hole 54 is formed, it is necessary to prepare a heat sealer having a wide seal surface with a seal width dimension W2. In the case of a dedicated machine for manufacturing a bag package in which the suspension hole 54 is formed, no replacement work is required by providing a heat sealer having such a wide sealing surface. However, when manufacturing a bag package of the same product, in order to manufacture the bag package P2 having the hanging hole 54 and the normal bag package P1 having no hanging hole 54 with different packaging machines, the respective packages are used. The machine must be prepared as equipment. On the other hand, when the bag packaging bodies P1 and P2 are to be manufactured by the same packaging machine, the heat seal device has a normal heat sealer whose sealing surface forms a normal seal width dimension W1 and a wide heat sealer which forms a seal width dimension W2. A structure that can be switched between the heat sealerButDesired.
[0005]
A bag supported in a suspended state by a grip moves intermittently at every station, and after filling the contents at the filling station, the bag mouth is sealed by a heat seal device or a rotary type or circulating movement type In this packaging machine, by replacing only the heat seal teeth, the replacement of the heater blocks 61 and 62, which is complicated to replace, is omitted, and a packaging machine provided with a heat seal device 60 that enables the seal width dimension W to be changed is proposed. (See Patent Document 1). That is, according to the packaging machine described in Patent Document 1, as shown in FIG. 7 (a), the heat seal device 60 includes a pair of heat seal teeth 63 (see FIG. 7 (b) is provided with a structure that can be attached to and detached from the heater blocks 61 and 62. The heat seal tooth 63 has a tooth surface 64 which is a seal surface having a seal width dimension W. Without replacing the heater blocks 61 and 62, the heat seal teeth 63 should be applied to the packaging material by replacing the heat seal teeth 63 with heat seal teeth 65 and 66 as shown in FIG. 7C or FIG. It is intended to make the seal width dimension changeable.
[0006]
In addition, as shown in FIG. 8, the heat seal device 70 of the packaging machine includes separate seal block units 71 and 75 having different seal widths as an integrated structure, and can be rotated around rotation fulcrums 73 and 76, respectively. Further, it has been proposed that the seal width dimension can be changed by rotating and switching a seal block that actually performs heat sealing by rotation. That is, with respect to the upper seal block unit 71, the seal block 72a having the seal width dimension W1 and the seal block 72b having the seal width dimension W2 extend in directions different from each other by 90 degrees from the viewpoint of space restriction and the like. As for the lower seal block unit 75, the two seal blocks 72a and 72b extend in directions different from each other by 180 degrees in the diametrical direction in order to avoid interference with a conveyor for conveying products. In order to change the seal width dimension, the upper and lower seal block units 71 and the seal block unit 75 may be rotated 90 degrees or 180 degrees around the rotation fulcrums 73 and 76 by hand.
[0007]
According to the packaging machine provided with the heat seal device shown in FIGS. 7 and 8, it is possible to easily change the seal width dimension as compared with the type in which the heater block is removed and replaced. However, in these packaging machines, it is not necessary to remove the heater block, but since the heat sealer is naturally cooled, it takes several hours to sufficiently cool until the replacement work is possible. It is. Even after cooling, the replacement work still takes a considerable amount of time, and during that time, the packaging machine must be stopped, which may reduce the operating efficiency of the packaging machine. Also, while the heat sealer is hot, there is a risk of burns if the replacement is performed manually. Furthermore, sufficient work experience is required to resume the operation of the heat seal device in a state of functioning normally after replacement and to obtain a clean seal finish of the packaging bag.
[0008]
Produces a packaging bag that is sealed from a cylindrical packaging material and encloses the product, and at the same time as the end seal molding of the packaged packaging bag, supplies it to a predetermined position on the sealing edge of the packaging bag. There has been proposed a bag making method and apparatus for a bag with a hanging device to which a hanging hanging device that is held in a standby state is stuck (see Patent Document 2).
[0009]
[Patent Document 1]
JP-A-11-91732 (2nd to 3rd pages, FIGS. 5 to 6)
[Patent Document 2]
JP-A-56-161144 (pages 3 to 4, FIG. 1 and FIG. 10)
[0010]
[Problems to be solved by the invention]
  Therefore,It is applied to seal the bag mouth of the packaging bag in a packaging machine that heats the packaging material and wraps the packaged product such as a product in a packaging bag,The packaging material is cut at an intermediate position in the seal width direction of the main seal.Heat sealEnables safe and reliable switching of seal width dimensions without the need for direct manual work on the heat sealerAt the same time, when the packaging bag is hung on the rod, a hole for hanging is formed on the sealing surface near the outside of the packaging bag.There is a problem to be solved in terms of points.
[0011]
  The object of the present invention is to enable the seal width to be changed without fear of being burned even if the heat sealer is not cooled and the heat sealer is still hot, and it is possible to switch the seal width without waiting for the heater block to cool. The time required for the work is shortened to prevent a reduction in the operating efficiency of the packaging machine. In addition, the heat sealer can be operated normally after changing the seal width dimension, or both sides of the cutting by the cutter mechanism even when only the main seal is used. Enables a clean sealing finish for packaging bags that are entirely heat-sealed with simple operation without requiring skill in replacement work.At the same time, when the packaging bag is hung on the rod and displayed, it is possible to form a hole for hanging on the sealing surface near the outside of the packaging bag.It is to provide a heat seal device applicable to a packaging machine or a bag making machine.
[0012]
[Means for Solving the Problems]
  In order to solve the above-mentioned problems, a heat seal device according to the present invention is a main seal surface capable of heat-sealing packaging materials that can be heat-weldedAnd a cutter mechanism having a cutter for cutting the packaging material that passes through a cutter groove opened at an intermediate position in the seal width direction on the main seal surface;A main heat sealer portion, at least one sub heat seal portion provided with a sub seal surface capable of heat sealing the packaging material, and the main heat seal portion, and the sub seal surface cooperates with the main seal surface An operating mechanism for switching the position of the sub heat sealer between a forward position where the packaging material can be heat sealed and a retracted position which is not in cooperation with the main seal surface.The actuating mechanism is an air actuated actuator, and the auxiliary heat sealer portion is positioned by an abutting portion that abuts against the main heat sealer portion in the advance position.It consists of that.
[0013]
  According to this heat seal device, the sub heat sealer can be switched between the forward position and the reverse position by the operating mechanism, and when the sub heat sealer occupies the forward position, the sub seal surface cooperates with the main seal surface. Since the packaging material can be heat sealed, the packaging material can be heat sealed over a wide range. Further, when the sub heat sealer occupies the retracted position, the sub seal surface does not cooperate with the main seal surface, so that the packaging material is heat sealed by the main seal surface. Therefore, in the same heat seal apparatus, the shape and form of the heat seal for the packaging material can be changed according to needs simply by switching the operation position of the sub heat sealer by the operation mechanism.In addition, since the cutter groove through which the cutter passes is opened on the main seal surface, the main seal is sealed with the packaging material cut by the cutter mechanism even when only the main seal is used. It is possible to obtain a package that has been fully sealed.
[0014]
  In this heat sealing apparatus, the operating mechanism is an air-actuated actuator.It is said. By using an air-operated actuator as the operation mechanism, the operation of the actuator can be switched through the air conduit only by the switch operation even from a position away from the heat seal device.Also, even if the heat sealer is not cooled and the heat sealer is still hot, it is possible to change the seal width without risk of burns, shortening the time required for the seal width switching work without waiting for the heater block to cool. Thus, it is possible to prevent a reduction in the operating efficiency of the packaging machine.
[0015]
  In this heat sealing apparatus, the sub heat sealer portion is positioned by an abutting portion that abuts against the main heat sealer portion in the advance position.Be done. When the sub seal surface of the sub heat sealer part cooperates with the main seal surface of the main heat sealer part, the position of the main seal surface is set so that the heat seal to the packaging material is a predetermined seal.AgainstPositioning is required.ViceThe heat sealer part is regulated by abutting the main heat sealer part by the abutting part in the forward movement position, and is positioned with respect to the main heat sealer part.Can meet these demands. When the sub heat sealer is in the forward movement position, the sub seal position can be flush with the main seal surface of the main heat sealer, for example.
[0016]
  This heat seal deviceIsIn a packaging machine that heat-seals the packaging material and wraps products such as products in a packaging bag, it is used as a seal to seal the bag mouth of the packaging bagHas been. A packaging bag is the most common container that can be formed from a packaging material and can contain a package. In a packaging machine that wraps a package in a packaging bag, the heat sealing device is used as a device for performing heat sealing to seal the bag mouth portion of the packaging bag containing the package.ButApplyIsThus, a seal that is switched to at least two modes can be obtained at the bag mouth.
[0017]
In the heat sealing apparatus applied to the packaging machine, the packaging machine continuously packs the bag package containing the package in the packaging bag by heat-sealing while storing the package in a cylindrical packaging film. It can be set as the bag making filling machine to manufacture. In a bag making and filling machine that continuously manufactures a bag package containing a package in a packaging bag, by applying this heat seal device to a heat seal device that heat seals while containing the package in a packaging film, The same bag making and filling machine can be used for manufacturing a bag package having different seal forms, and the manufacturing cost of the bag package can be reduced.
[0018]
  In the heat seal device applied to the packaging machine, the sub-seal surface is a seal surface that heat-seals the bag mouth portion closer to the outside of the packaging bag than the main seal surface, and the sub-heat sealer includes the Drilling mechanism that forms a hole for suspension in the heat seal part formed by the secondary seal surfaceButArrangementHas been. As a form of display at a bag packaging store, there is a case where a suspension hole is formed in the heat seal portion and the suspension rod is displayed in a suspended state through the suspension hole. In this case, in order to prevent the deterioration and damage of the bag package due to heat sealing in advance, it is required to form a hanging hole in the seal portion having a wide seal width and closer to the outside of the bag package. Perforation mechanism in the secondary heat sealer where the main sealing surface is located near the outside of the packaging bagButArrangementBecauseThus, it is possible to form a suspension hole in the heat seal portion formed by the sub seal surface.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the heat sealing apparatus according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a front view of an embodiment of a heat seal device according to the present invention as viewed from the side of a sub heat seal portion, where (a) is a view showing a state when a wide seal is formed, and (b) is a view when forming a standard seal. It is a figure which shows the state of. 2A is a back view of the heat sealing apparatus shown in FIG. 1 as viewed from the main heat seal portion side, and FIG. 2B is a side view mainly showing the main heat seal portion. FIG. 3 is a side view showing the main part of the heat sealing apparatus shown in FIG. 1, wherein (a) is a diagram showing a state when a wide seal is formed, and (b) is a diagram showing a state when a standard seal is formed. Further, FIG. 4 is a central sectional view showing a main part of the heat sealing apparatus shown in FIG. The heat sealing apparatus shown in FIGS. 1 to 4 can be applied to a horizontal pillow packaging machine as a bag making and filling machine already described as the prior art as shown in FIG. A description of each mechanism of the machine will be omitted.
[0020]
The heat sealer 1 shown in FIGS. 1 to 4 is configured by an upper sealer unit 2 and a lower sealer unit 3 being arranged to face each other, and a heat sealer portion is configured by a pair of upper and lower sides. Both sealer units 2 and 3 approach and separate from the cylindrical packaging film F in a state where the posture is maintained by a pair of guide rods 4 and 4 extending in the vertical direction at positions where the packaging film F is sandwiched between the left and right sides. It is guided in the direction to do. When both the sealer units 2 and 3 are pressed while sandwiching the packaging film F, the inner surfaces of the packaging film F are welded together to perform heat sealing. The approach / separation operations of the sealers 2 and 3 are not shown in detail here, but the rotation output of the motor is converted into a reciprocating motion in the vertical direction by a mechanical motion conversion mechanism such as an appropriate cam link. Can be obtained.
[0021]
The upper sealer unit 2 is disposed across the pair of guide rods 4, 4 and is slidably engaged with the guide rods 4, 4 via a bearing 5 a, and is fixed to the drive block 5. The main heat sealer unit 6 is provided, and a sub heat sealer unit 8 that is relatively displaceable in the vertical direction with respect to the main heat sealer unit 6 via a pair of operating mechanisms 7 attached to the drive block 5. The main heat sealer 6 is a main heater block 9 directly attached to the drive block 5, as shown in FIGS. 2 to 4, and includes a built-in heater 9a and a seal surface 9b for heat sealing the packaging film. Have. The main heat sealer 6 includes a cutter mechanism 10 that is actuated by an air-actuated actuator 10a in order to separate the package P from the cylindrical packaging film Ft, and the cutter 11 passes through the main heater block 9. The cutter groove 12 is formed so as to open to the seal surface 9b.
[0022]
The operation mechanisms 7 and 7 attached to the drive block 5 are provided at symmetrical positions adjacent to the guide rods 4 and 4, respectively. Each actuating mechanism 7 is an air actuated actuator having an output rod 7a that operates in the vertical direction. In the illustrated example, the output rod 7a is attached to the drive block 5 via its bracket 5b. A sub heat sealer portion 8 is attached to the cylinder 7 b of each operating mechanism 7. As shown in FIG. 1 and FIG. 3, the sub heat sealer portion 8 is fixed to the cylinders 7 b and 7 b of the operating mechanisms 7 and 7 and extends parallel to the drive block 5, and an intermediate portion attached to the support block 13. A bracket 14 and a sub heater block 15 attached to the intermediate bracket 14 are provided. Since the support block 13 is slidably smoothly guided by the guide rods 4 and 4 via the slide bearings 13a and 13a, the parallel movement of the sub heat sealer portion 8 with respect to the main heat sealer portion 6 is always ensured. Similar to the main heater block 9, the sub heater block 15 has a built-in heater 15a and a sealing surface 15b for heat-sealing the packaging film.
[0023]
The auxiliary heat sealer 8 can be moved up and down via the cylinder 7b with respect to the output rod 7a attached to the drive block 5 by the operation of the operation mechanisms 7 and 7, and FIG. 1 (a) and FIG. 3 (a). As shown in FIG. 1, the sub heater block 15 is in contact with the packaging film F and can be heat-sealed (the A position for the seal surface 15b), and in FIGS. 1 (b) and 3 (b). The position shown can be switched between a retracted position where the packaging film F cannot be heat sealed (the B position for the sealing surface 15b). The intermediate bracket 14 is formed with an alignment step 14 a that can be engaged with the corner 5 c of the drive block 5. When the sub heater block 15 occupies the operating position, the stepped portion 14a of the intermediate bracket 14 is engaged with the corner portion 5c of the drive block 5 so that the seal surface 15b is in contact with the seal surface 9b of the main heater block 9. An alignment position that is flush with each other can be secured. The sub heat sealer 8 is provided with a punching mechanism 16 (FIG. 1) for punching a suspension hole. The punching mechanism 16 includes an air-actuated actuator 16a, a punching punch 17, and a sealing surface 9b for that purpose. A passage hole 18 is formed in the opening.
[0024]
The lower sealer unit 3 is also disposed across the pair of guide rods 4, 4 and slidably engaged with the guide rods 4, 4, and the drive block 20. A main heat sealer portion 26 and a sub heat sealer portion 28 that can be displaced relative to the main heat sealer portion 26 in the vertical direction via a pair of operating mechanisms 27 attached to the drive block 20 are provided. As shown in FIGS. 2 to 4, the drive block 20 is slidably engaged with the guide rods 4, 4, and the drive block 20 stands in a direction away from the upper sealer unit 2. It has a pair of support | pillar parts 20b and 20b provided, and the connection part 20c which connects the support | pillar parts 20b and 20b. A support block 25 for the main heat sealer 26 is disposed in parallel with and spaced from the connecting portion 20c. The support block 25 has upper and lower support block portions 25a and 25b with the slide block portion 20a interposed therebetween, and both the support block portions 25a and 25b are inserted into the slide block portion 20a as shown in FIG. The left and right connecting rods 25c and 25c are connected to each other.
[0025]
A pair of buffer mechanisms 21 and 21 are interposed between the drive block 20 and the support block 25. Each buffer mechanism 21 is fixed to the support block 25 and extends through the connecting portion 20c, and can be brought into contact with the connecting portion 20c by being screwed into a screw portion on the distal end side of the rod 21a. A nut 21b and a coil spring 21d surrounding the rod 21a and disposed between the flange portion 21c and the connecting portion 20c are provided. When the drive block 20 is driven upward, the main heat sealer portion 26 is pressed from the drive block 20 toward the main heat sealer portion 6 via the buffer mechanism 21, and the packaging film is sandwiched between the main heat sealer portion 6. The main heat sealer portion 26 is a main heater block 29 directly attached to the upper support block portion 25b, and has a built-in heater 29a and a seal surface 29b for heat-sealing the packaging film. A cutter groove 32 through which the cutter 11 provided in the cutter mechanism 10 passes is formed in the main heater block 29 so as to open to the seal surface 29b.
[0026]
As shown in FIGS. 1 and 3, operating mechanisms 27 and 27 for switching the operating position of the sub heat sealer 28 are attached to the support block 25, as in the case of the upper sealer unit 2. A cylinder 27b of each operating mechanism 27 is attached to the lower support block portion 25a, and a sub heat sealer portion 28 is attached to the tip of the output rod 27a. The sub heat sealer 28 includes a support block 33 extending in parallel with the support block 25 and a sub heater block 35 attached to the support block 33, and a pair of left and right connecting rods 34 provided on the support block 25. Therefore, the parallel movement of the sub heat sealer portion 28 with respect to the main heat sealer portion 26 is always ensured when the operation mechanisms 27 and 27 are operated. Similar to the sub heater block 15, the sub heater block 35 has a built-in heater 35a and a sealing surface 35b for heat-sealing the packaging film. As shown in FIG. 4, the auxiliary heater block 35 is formed with a receiving hole 38 in a position corresponding to the passage hole 18 so that the receiving hole 38 into which the punching punch 17 is fitted when the punching mechanism 16 is operated opens in the seal surface 35 b. Has been.
[0027]
Similar to the sub heat sealer unit 8, the sub heat sealer unit 28 causes the sub heater block 35 to come into contact with the packaging film F as shown in FIGS. 1 (a) and 3 (a) by the operation of the operation mechanisms 27, 27. As shown in FIG. 1 (b) and FIG. 3 (b), the operation position where the heat sealing can be performed (the advance position A ′ with respect to the sealing surface 35b) and the position where the packaging film F cannot be heat sealed ( The sealing surface 35b can be switched between the retracted position B ′). The support block 33 is formed with an alignment step 33 a that can be engaged with the corner 25 d of the support block 25. When the sub heater block 35 occupies the operating position, the step portion 33a of the support block 33 is engaged with the corner portion 25d of the support block 25 so that the seal surface 35b and the seal surface 29b of the main heater block 29 are in contact with each other. An alignment position that is flush with each other can be secured.
[0028]
The main heat sealer part 6 of the upper sealer unit 2 and the main heat sealer part 26 of the lower sealer unit 3 are arranged to face each other, constitute the main heat sealer part in the heat seal device 1, and are sandwiched between the packaging films F Can be heat-welded. Similarly, the auxiliary heat sealer portion 8 of the upper sealer unit 2 and the auxiliary heat sealer portion 28 of the lower sealer unit 3 are arranged to face each other to form the auxiliary heat sealer portion in the heat seal device 1 and sandwiched therebetween. The film F can be thermally welded as a sub heat seal portion following the main heat seal portion.
[0029]
An outline of the operation of the heat sealing apparatus 1 configured as described above will be described below. When it is necessary to form the heat seal portion 52 having the wide dimension W2 in the opening portion of the packaging bag as shown in FIG. 3), the output rod 7a of the operating mechanism 7, 7 of the upper sealer unit 2 is retracted, and the output rod 27b of the operating mechanism 27, 27 of the lower sealer unit 3 is advanced. In the upper sealer unit 2, the stepped portion 14 a of the intermediate bracket 14 and in the lower sealer unit 3, the alignment stepped portion 33 a formed on the support block 33 is the corner portion 5 c of the drive block 5, or The drive block 25 is positioned by hitting the corner 25d. As a result, the sealing surfaces 15b, 35b of the auxiliary heater blocks 15, 35 of the auxiliary heat sealers 8, 28 in the upper and lower sealer units 2, 3 are the sealing surfaces of the main heater blocks 9, 29 of the main heat sealers 6, 26. 9b, 29b, and a wide sealing width can be given to the packaging film F.
[0030]
When the drive blocks 5 and 20 are driven by the drive mechanism and approach the packaging film F, the seal surfaces 9b and 15b of the main and sub heater blocks 9 and 15 of the upper sealer unit 2 come into contact with the upper surface of the packaging film F. The seal surfaces 29b and 35b of the main and sub heater blocks 29 and 35 of the lower sealer unit 3 are in contact with the lower surface of the packaging film F and sandwich the packaging film F. At this time, the shock absorbing mechanism 21 disposed between the drive block 20 and the support block 25 absorbs an excessive pinching force of the packaging film F by the spring 21d compressing, so that the packaging film F is heat sealed. Damage due to excessive pinching pressure at the time and poor sealing can be avoided. When the suspension hole 54 is formed in the heat seal portion 52 of the bag package (see P2 shown in FIG. 6B), the perforation mechanism 16 is activated and the perforation punch 17 is suspended in the packaging film F. Open. Although the seal width is changed, the punching mechanism 16 can be prevented from being operated when the suspension hole 54 is not formed. Further, when the suspending hole 54 is not formed at all, the punching mechanism 16, the punching punch 17, the passing hole 18 and the receiving hole 38 may not be provided.
[0031]
When the heat seal at the bag mouth portion of the packaging bag may be a normal seal width dimension W1 as in the bag package P1 shown in FIG. 6A, it is shown in FIG. 1B and FIG. 3B. As described above, the output rod 7a of the operating mechanism 7, 7 of the upper sealer unit 2 is advanced, and the output rod 27b of the operating mechanism 27, 27 of the lower sealer unit 3 is retracted. In the upper and lower sealer units 2 and 3, the sealing surfaces 15b and 35b of the auxiliary heater blocks 15 and 35 of the auxiliary heat sealers 8 and 28 are the sealing surfaces 9b and 29b of the main heater blocks 9 and 29 of the main heat sealers 6 and 26, respectively. Therefore, only the seal surfaces 9b and 29b can seal the packaging film F, and can provide a normal width seal width W1.
[0032]
As described above, as an embodiment of the heat sealing apparatus according to the present invention, horizontal pillow packaging in which products are sequentially supplied to a cylindrical packaging film continuously supplied in the horizontal direction, and the packaging film is heat-sealed at positions before and after the product. However, the present invention is not limited to this, but the product is sequentially filled in a cylindrical packaging film that is continuously supplied in the vertical direction, and the packaging film is heat-sealed at positions before and after the product. It is clear that it can be applied to any type of packaging machine that heat-seals a bag using heat sealing, such as a mold-filling packaging machine, or a rotary-type packaging machine in which a gripped bag rotates horizontally and revolving around the turret. It is. Further, the place to be heat-sealed is not limited to the top seal in which the hole for suspending is formed, but can be applied anywhere as long as it is a seal portion for changing the seal width. In addition, when changing the seal width dimension and position according to design requirements, not only the seal width but also various shapes of the seal including the extraction port are formed with split sealers, or not only the packaging machine The heat sealing apparatus according to the present invention can also be applied to a bag making machine that manufactures bags.
[0033]
【The invention's effect】
  In order to solve the above-described problems, a heat seal device according to the present invention has a cutter mechanism having a main seal surface and a cutter for cutting packaging material that passes through a cutter groove that opens at an intermediate position in the seal width direction of the main seal surface. It is mounted on the main heat sealer part with at least one sub heat sealer part with the sub seal surface and the main heat sealer part, and the sub heat sealer part is positioned by the abutting part that abuts the main heat sealer part, and the sub seal An operating mechanism is provided that switches the position of the sub heat sealer between a forward position where the surface can heat-seal the packaging material in cooperation with the main seal surface and a retracted position where the surface does not cooperate with the main seal surface. Therefore, the auxiliary heat sealer is configured to be switchable between the forward position and the backward position by the operating mechanism. Therefore, when the secondary heat sealer occupies the forward position, the secondary seal surface can cooperate with the main seal surface to heat-seal the packaging material over a wide range, and when the secondary heat sealer occupies the retracted position. The sub-seal surface is not in cooperation with the main seal surface, and the packaging material is only heat-sealed by the main seal surface. Further, it is possible to obtain a package in which the main seal is entirely sealed with the packaging material cut on both sides cut by the cutter mechanism, not only when the sub seal is applied, but also when only the main seal is provided.. MaAlso, in the same heat seal device, the sub heat sealer operates until it hits the main heat sealer against the main heat sealer with a simple operation of switching the operation position of the sub heat sealer with the operating mechanism that is an air-actuated actuator. By doing so, it is positioned at the forward movement position.Furthermore, a sub-sealing surface for heat-sealing the bag mouth portion is provided closer to the outside of the packaging bag than the main sealing surface, and a suspension hole is formed in the heat-sealing portion formed by the sub-sealing surface in the sub-heat sealer portion. By arranging the drilling mechanism, a hole for hanging can be formed in the heat seal part formed by the secondary seal surface, and when displaying in a suspended state through the hanging hole on the rod for hanging In addition, it is possible to prevent deterioration and damage of the bag package due to heat sealing.Thus, according to this heat sealing apparatus, the shape and form of the heat seal for the packaging material can be changed according to needs, and even if the heat sealer is not cooled and the heat sealer is still hot, it can cause burns. It is possible to change the seal width dimension without fear, reduce the time required for the seal width switching work without waiting for the cooling of the heater block, and prevent a reduction in the operating efficiency of the packaging machine. Therefore, the normal operation of the heat seal device after the seal width is changed and a clean seal finish of the packaging bag can be obtained.
[Brief description of the drawings]
FIG. 1 is a front view of an embodiment of a heat seal device according to the present invention as viewed from the side of a sub heat seal portion, where FIG. 1 (a) is a view showing a state when a wide seal is formed, and FIG. It is a figure which shows the state of time.
2A is a back view of the heat sealing apparatus shown in FIG. 1 as viewed from the main heat seal portion side, and FIG. 2B is a side view mainly showing the main heat seal portion.
3 is a side view showing the main part of the heat sealing apparatus shown in FIG. 1, (a) is a diagram showing a state when a wide seal is formed, and (b) is a diagram showing a state when a standard seal is formed. FIG. .
4 is a central cross-sectional view showing a main part of the heat sealing apparatus shown in FIG. 1. FIG.
FIG. 5 is a perspective view schematically showing an example of a conventional horizontal pillow packaging machine.
6A is a perspective view showing an example of a packaging bag in which the heat seal portion has a normal seal width dimension W1, and FIG. 6B is an example of a packaging bag in which the heat seal portion has a wide seal width dimension W2. It is a perspective view shown.
FIG. 7 is a diagram showing a conventional example of a heat seal device that enables a seal width dimension to be changed by exchanging heat seal teeth.
FIG. 8 is a diagram showing an example of a heat seal device that can change a seal width dimension by switching a seal block by rotation.
[Explanation of symbols]
1 Heat seal device
6,26 Main heat sealer 9b, 29b Main seal surface
8, 28 Sub heat sealer 15b, 35b Sub seal surface
10 Cutter mechanism 16 Drilling mechanism
27 Actuating mechanism 5c, 25d Corner 14a, 33a Step
50 Packaging bag 50a Bag mouth part 51, 52 Heat seal part
54 Hole for hanging
A, A 'forward position B, B' backward position F Packaging material (wrapping film)
G Package Ft Cylindrical packaging film P1, P2 Bag packaging

Claims (1)

A main seal surface capable of heat-sealing a heat-weldable packaging material, and a cutter mechanism having a cutter for cutting the packaging material that passes through a cutter groove opened at an intermediate position in the seal width direction on the main seal surface. A heat sealer, at least one subheat sealer provided with a subseal surface capable of heat sealing the packaging material, and the main heat sealer; and the subseal surface cooperates with the main seal surface to form the packaging An operation mechanism for switching the position of the sub heat sealer between a forward position enabling heat sealing of the material and a retracted position not cooperating with the main seal surface;
In a heat sealing apparatus that is applied to seal a bag mouth portion of the packaging bag in a packaging machine that performs heat sealing on the packaging material and wraps a package such as a product in a packaging bag,
The actuating mechanism is an air-actuated actuator, and the sub heat sealer portion is positioned by an abutting portion that abuts the main heat sealer portion at the advance position ,
The secondary seal surface is a seal surface that heat-seals the bag mouth portion closer to the outer side of the packaging bag than the main seal surface, and the secondary heat sealer portion includes a heat seal portion formed by the secondary seal surface. heat sealer drilling mechanism for forming a hole for hanging is made of Rukoto been arranged.

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