JP6212297B2 - Heat sealing device - Google Patents

Description

  The present invention relates to a heat sealing device that is used in a vacuum packaging machine or the like and seals a heat-sealable packaging bag.

  The following Patent Document 1 discloses a vacuum packaging machine provided with a heat sealing device that heat seals and seals a packaging bag. This vacuum packaging machine includes a chamber composed of a chamber base and a chamber cover, a vacuum pump for reducing the pressure inside the chamber, and a heat sealing device for sealing the outer periphery of the opening of the packaging bag housed in the chamber by heat welding. I have. The heat sealing device of the vacuum packaging machine includes a lower narrow pressure block provided on the chamber base so as to be movable up and down and having a heater on the upper portion, and an upper narrow pressure block provided on the lower surface of the chamber cover. Yes. In addition, the peripheral edge of the lower opening of the packaging bag is located at the peripheral edge of the lower opening of the packaging bag without the peripheral edge of the opening opening of the packaging bag placed on the chamber base standing up at the peripheral edge of the lower narrow pressure block. Is provided on the upper side of the lower narrow pressure block. The guide base is composed of an upright portion that rises vertically from the close edge of the lower narrow pressure block, and an inclined portion that is inclined downward in a direction away from the lower narrow pressure block from the upper end of the upright portion. A portion of the packaging bag placed on the upper side of the block is guided from the peripheral edge of the front end opening to the bottom surface of the base end so as to form a predetermined angle from the top surface of the bottom wall of the chamber base.

JP 2001-010608 A

  In the vacuum packaging machine described above, the inclination angle of the inclined portion of the guide table provided on the chamber base is about 20 °, and the inclination angle of the inclined portion of the guide table is reduced to 20 °. The peripheral edge of the distal end opening is guided to the upper side of the lower narrow pressure block without standing up near the lower narrow pressure block. When liquid food such as soup is stored in the packaging bag, if the amount of liquid food is small, the liquid food leaks from the opening of the front end of the packaging bag even if the inclination angle of the inclined portion of the guide base is small. Without any problem, the peripheral edge of the opening of the packaging bag can be guided to the upper side of the lower narrow pressure block. However, when a large amount of food is stored in the packaging bag, the food may leak out from the periphery of the opening of the packaging bag if the inclination angle of the inclined portion of the guide table is small. In order to prevent the food material from leaking out from the periphery of the opening of the packaging bag, it is necessary to increase the inclination angle of the inclined portion of the guide table. The inclination angle of the inclined portion could not be changed according to the amount of food in the bag. It is an object of the present invention to provide a heat sealing device that can appropriately guide the peripheral edge of the front end opening of the packaging bag to the upper side of the lower narrow pressure block even if the amount of the packaged articles accommodated in the packaging bag changes. To do.

In order to solve the above-mentioned problems, the present invention provides a lower narrow pressure block provided on a base, and a heat which is provided on the upper side of the lower narrow pressure block and contains an object to be packaged together with the lower narrow pressure block. Provided in at least one of the upper narrow pressure block and the lower and upper narrow pressure blocks that hold the peripheral edge of the opening of the packaging bag that can be welded with a narrow pressure, and is held by being narrowed by the lower and upper narrow pressure blocks. A heater that heats and heat-bonds the periphery of the front opening of the packaging bag, and a detachable device provided near the lower narrow pressure block of the base, and tilts downward in a direction away from the lower narrow pressure block. And a guide base that guides a part of the base end side of the packaging bag from the periphery of the front end opening to the top surface of the base at a predetermined angle, the guide base being the packaging bag. A part of the base end bottom side from the periphery of the tip opening There is provided a heating sealing device being characterized in that set to be possible to change the inclination angle of the guide surface for guiding.

  In the heat sealing device configured as described above, the guide table can change the angle of the guide surface that guides a part of the base end bottom side from the peripheral edge of the front end opening of the packaging bag. When the amount of the guide is small, it is possible to guide the peripheral edge of the opening end of the packaging bag to the upper side of the lower narrow pressure block by reducing the inclination angle of the guide surface of the guide table. When there is a large amount of objects, the angle of inclination of the guide surface of the guide table is increased to guide the periphery of the tip opening to the upper side of the lower narrow pressure block without leakage of the packaged object from the tip opening of the packaging bag. I can do it now.

  As one embodiment of the heat sealing device configured as described above, the guide table includes a first guide plate having an upright portion that rises upward at the vicinity of the lower narrow pressure block of the base, and a first guide plate. A second guide plate having a guide surface that is removably attached to the standing portion of the guide plate and guides a part of the base end bottom side from the peripheral edge of the front end opening of the packaging bag. An engaging portion for detachably attaching to the standing portion of the guide plate and a plurality of engaged portions that can be engaged with the engaging portion at different positions in the vertical direction are provided on the standing portion of the first guide plate. Is preferred. Further, in the heat sealing apparatus configured as described above, the lower narrow pressure block is detachably supported by a support shaft protruding from the upper surface of the base, and the support shaft is moved up and down on the upper surface of the base. A nut for fixing the elevating cylinder is provided, and the first guide plate extends from the lower portion of the upright portion so as to contact the upper surface of the base on the lower side of the lower narrow pressure block, and the first guide plate is in a state where the upright portion is raised. A horizontal plate portion on which the guide plate is placed on the upper surface of the base, and the horizontal plate portion engages with an outer peripheral portion of the nut, and engages with the lower surface of the lower narrow pressure block protruding upward. It is preferable to provide a locking projection that can be stopped. In this case, when the horizontal plate portion of the first guide plate of the guide base is placed on the upper surface of the base, the engagement hole portion of the horizontal plate portion The peripheral edge of the nut engages with the outer periphery of the nut so that it does not shift horizontally. , The locking projection is prevented lifted upward engaged with the lower surface of the lower Sema圧 blocks, it was possible to prevent the guide block being displaced.

  In the heat sealing apparatus configured as described above, the inclination angle of the guide surface of the guide table can be changed in the range of 25 ° to 70 °, and more preferably the inclination angle is in the range of 30 ° to 60 °. It is preferable to make it changeable.

It is a perspective view which shows one Embodiment of the vacuum packaging machine using the heat sealing apparatus of this invention, and is a perspective sectional view which fractured | ruptured partially in order to show the inside of a chamber and a housing. It is a partially expanded perspective sectional view of the state where the lower narrow pressure block of FIG. 1 is removed. It is the perspective view which looked at the 1st guide plate from (a) diagonally forward, and (b) is the perspective view seen from diagonally back. It is the perspective view which fractured | ruptured the front part of the chamber base in order to show a 1st guide plate and a lower narrow pressure block. It is the perspective view which looked at the 2nd guide plate from back. (A) It is sectional drawing which engaged the hook of the 2nd guide plate with the upper mounting hole of the standing part of the 1st guide plate when many liquid foodstuffs were stored in the packaging bag, (b) The packaging bag FIG. 5 is a cross-sectional view in which the hook of the second guide plate is engaged with the lower mounting hole of the first guide plate when a small amount of liquid food material is accommodated.

  Hereinafter, an embodiment of a vacuum packaging machine using the heat sealing apparatus of the present invention will be described with reference to the accompanying drawings. As shown in FIG. 1, the vacuum packaging machine 10 includes a chamber 12 that houses a packaging bag in an upper part of a housing 11, and a vacuum pump 15 that decompresses the inside of the chamber 12 in a lower part of the housing 11. The chamber 12 is a pressure-resistant container composed of a shallow dish-shaped chamber base 13 having an upper surface opened and a chamber cover 14 made of a pressure-resistant acrylic plate that opens and closes the upper surface opening of the chamber base 13. The front portion and the left and right side portions of the chamber base 13 are shallow bottom portions 13a which are shallower than other portions, and the other portions are bottom deep portions 13b. The bottom deep portion 13b of the chamber base 13 is curved so that the central portion in the left-right direction is lowered, and the food is easily collected at the central portion even if the food leaks into the bottom deep portion 13b. The chamber cover 14 is supported around the horizontal axis at the rear end of the housing 11 so that the front end can move up and down. The chamber cover 14 shown in FIG. 1 is in an open state without closing the upper surface opening of the chamber base 13.

  As shown in FIG. 1, a heat sealing device 20 is provided at the front of the chamber 12. The heat sealing device 20 seals the peripheral edge portion of the front opening of the packaging bag that can be thermally welded and accommodated in the chamber 12. Note that the packaging bag uses a thermoplastic resin film having a two-layer structure that employs a material having a low melting point on the inside. The heat sealing device 20 includes lower and upper narrow pressure blocks 21 and 22 that hold the peripheral edge of the opening of the packaging bag in a narrow pressure. The lower narrow pressure block 21 is made of an aluminum square pipe member, and is detachably mounted on the front bottom shallow portion 13a of the chamber base (base) 13 so as to be movable up and down. The upper narrow pressure block 22 is made of an elastically deformable silicon block body, and is provided at the front of the lower surface of the chamber cover 14 at a position facing the upper side of the lower narrow pressure block 21.

  On the upper surface of the lower narrow pressure block 21, a heater 23 in the form of a strip made of a nichrome material is provided via a Teflon (registered trademark) tape adhered for electrical insulation. A Teflon (registered trademark) tape is attached to the upper surface of the pressure block 21 so as to cover the upper surface of the heater 23.

  As shown in FIG. 1, a pair of left and right lifting mechanisms 24 (only the right side is shown in FIG. 1) are provided at the front of the chamber base 13 to raise and lower the lower narrow pressure block 21 up and down. As shown in FIG. 2, the elevating mechanism 24 includes a pair of left and right support shafts 25 that penetrate the bottom wall of the front portion of the chamber base 13. These support shafts 25 support the lower narrow pressure block 21 at the front portion of the chamber base 13 so as to be movable up and down. These support shafts 25 are inserted at the lower end of the lower narrow pressure block 21, and the support shaft 25 is vertically moved by a pair of left and right lifting cylinders 26 whose upper and lower intermediate portions are provided in front of the lower surface of the chamber base 13. Is supported so as to be movable. These elevating cylinders 26 are fixed by a fixing nut 27 provided on the upper surface of the bottom wall of the front portion of the chamber base 13.

  As shown in FIG. 1, a guide base 30 is provided on the rear side (near edge) of the lower narrow pressure block 21 on the lower side of the chamber base 13. The guide table 30 is inclined downward in a direction away from the lower narrow pressure block 21 so that a part of the packaging bag from the peripheral edge of the front end opening to the upper surface of the bottom deep portion 13b of the base base 13 has a predetermined angle. It guides you to become. The guide table 30 includes a first guide plate 31 that is detachably provided on the chamber base 13 and a second guide plate 34 that is detachably provided on the first guide plate 31.

  As shown in FIGS. 1 and 3, the first guide plate 31 includes a horizontal plate portion 32 extending below the lower narrow pressure block 21 so as to contact the upper surface of the chamber base 13, and the horizontal plate portion 32. And a standing portion 33 that rises upward from the rear end. As shown in FIGS. 3 and 4, the horizontal plate portion 32 is provided with a pair of locking hole portions 32a made of through holes on both sides in the left-right direction, and the pair of locking hole portions 32a is moved up and down. The cylinder 26 is locked to the outer periphery of a fixing nut 27 to which the cylinder 26 is attached. Also, a pair of locking projections 32b bent so as to protrude upward are provided at the left and right ends of the horizontal plate portion 32, and these locking projections 32b are provided on the lower narrow pressure block 21 at the lowered position. Locked to the bottom surface.

  The standing portion 33 has a vertical portion 33a extending vertically to the height of the lower portion of the lower narrow pressure block 21 on the rear side of the lower narrow pressure block 21, and the height of the upper surface of the lower narrow pressure block 21 from the upper end of the vertical portion 33a. It consists of an inclined portion 33b which is inclined to the lower narrow pressure block 21 side (front side) to the vertical position. In the inclined portion 33b, two pairs of left and right attachment holes (engaged portions) 33c for attaching the second guide plate 34 are formed in the vertical direction (upper side is 33c-1, lower side is 33c-2). .

  As shown in FIGS. 1 and 5, the second guide plate 34 has a part on the base bottom side from the peripheral edge of the front opening portion of the packaging bag placed on the upper surface of the lower narrow pressure block 21 by the upper guide surface 34a. It is guided to the upper surface of the bottom deep portion 13b of the chamber base 13. A pair of left and right hooks (engagement portions) 34 b formed by bending rearward are provided at the upper end of the second guide plate 34, and these hooks 34 b are attached to upper and lower mounting holes of the standing portion 33 of the first guide plate 31. 33c-1, 33c-2 can be selectively engaged. As shown in FIG. 6A, when the hook 34 b of the second guide plate 34 is engaged with the mounting hole 33 c-1 on the upright portion 33 of the first guide plate 31, The guide surface 34 a is inclined with respect to the upper surface of the chamber base 13 at an angle of 60 °. As shown in FIG. 6B, when the hook 34 b of the second guide plate 34 is engaged with the lower mounting hole 33 c-2 of the upright portion 33 of the first guide plate 31, the second guide plate 34. The guide surface 34 a is inclined at an angle of 30 ° with respect to the upper surface of the chamber base 13. When the guide surface 34a of the second guide plate 34 is inclined at 60 ° (larger angle), it is suitable for guiding the base end side from the peripheral edge of the front end opening of the packaging bag containing a large amount of liquid food such as soup. ing. On the other hand, when the guide surface 34a of the second guide plate 34 is inclined by 30 ° (small angle), the base end side is guided from the peripheral edge of the front opening of the packaging bag containing a small amount of liquid food such as soup. Suitable for doing.

  In the vacuum packaging machine 10 configured as described above, the base end bottom side of the packaging bag is placed on the bottom deep portion 13b of the chamber base 13, and the leading end opening of the packaging bag is placed on the lower narrow pressure block 21 in the lowered position. Place the periphery. At this time, a part of the bottom end side of the base end of the packaging bag from the periphery of the front end opening is guided to the upper surface of the bottom deep portion 13b of the chamber base 13 by the guide table 30, and liquid food materials such as soup leak from the front end opening. Without doing so, the peripheral edge of the opening end of the packaging bag is guided to the upper surface of the lower narrow pressure block 21. After the inside of the chamber 12 is depressurized by the vacuum pump 15 and the inside of the chamber 12 reaches a predetermined degree of vacuum, the left and right support shafts 25 are raised by the left and right lifting cylinders 26, and the lower narrow pressure block 21 is raised to the raised position. The upper narrow pressure block 22 is pressed. At this time, the peripheral edge of the opening of the packaging bag placed on the lower narrow pressure block 21 is held by being compressed by the lower narrow pressure block 21 and the upper narrow pressure block 22. In this state, when the heater 23 is energized from a power source (not shown) to generate heat, the peripheral edge of the opening of the packaging bag held by the upper and lower narrow pressure blocks 21 and 22 is thermally welded. Sealed. Thereafter, the atmosphere is introduced into the chamber 12 to return to the atmospheric pressure, and when the support shaft 25 is lowered by the elevating cylinder 26, the lower narrow pressure block 21 returns to the lowered position.

  When the peripheral edge of the opening end of the packaging bag is narrowed by the lower and upper narrow pressure blocks 21, 22, the peripheral edge of the opening end of the packaging bag is placed on the upper surface of the lower narrow pressure block 21. It is necessary to lay the bag on the upper surface of the chamber base 13. When a small amount of liquid food is put in the packaging bag, the risk of leakage of the food from the front opening of the packaging bag is small, so the inclination angle of the guide surface 34a of the guide table 30 is reduced, and the lower narrow pressure block 21 is placed. It is preferable to guide a part of the base end side from the periphery of the opening of the packaging bag placed on the upper surface of the packaging bag to the upper surface of the chamber base 13. On the other hand, when a large amount of liquid food material is put in the packaging bag, the food material may leak out from the front end opening of the packaging bag. It is preferable to guide a part of the base bottom side from the periphery of the opening of the packaging bag placed on the upper surface of the narrow pressure block 21 to the upper surface of the chamber base 13.

  In the heat sealing device 20 of the vacuum packaging machine 10 of this embodiment, the guide table 30 can change the inclination angle of the guide surface 34a that guides a part of the base end bottom side from the peripheral edge of the front end opening of the packaging bag. did. As shown in FIG. 6B, when the amount of liquid food (packaged material) S such as soup contained in the packaging bag B is small, the inclination angle of the guide surface 34a of the guide table 30 is small (this implementation). By setting the angle to 30 ° in the form, the peripheral edge of the tip opening can be guided to the upper side of the lower narrow pressure block 21 without leakage of the liquid food S from the tip opening of the packaging bag B. In addition, as shown in FIG. 6A, when the amount of liquid food (packaged material) S such as soup in the packaging bag B is large, the inclination angle of the guide surface 34a of the guide table 30 is increased (this (In the embodiment, the angle is set to 60 °). Even if the amount of the food S in the packaging bag B is large, the liquid food S does not leak from the front opening of the packaging bag B, and the periphery of the tip opening is narrowed down. Guided to the upper side of the block 21.

  Specifically, the guide base 30 of the heat sealing device 20 includes a first guide plate 31 having an upright portion 33 that rises upward at the rear side of the lower narrow pressure block 21 of the chamber base 13, and a first guide plate 31. And a second guide plate 34 having a guide surface 34a that is detachably attached to the standing portion 33 of the guide plate 31 and guides a part of the proximal end bottom side from the peripheral edge of the front opening of the packaging bag. A pair of left and right hooks (engagement portions) 34b for detachably attaching to the inclined portion 33b of the standing portion 33 of the first guide plate 31 and the inclined portion of the standing portion 33 of the first guide plate 31 are attached to the second guide plate 34. The portion 33b is provided with two sets (a plurality) of a pair of left and right mounting holes (engaged portions) 33c that can be engaged with the hook 34b at different positions in the vertical direction.

  When the amount of liquid food (packaged material) in the packaging bag is small, the hook 34b of the second guide plate 34 is engaged with the lower mounting hole 33c-2 of the first guide plate 31, and the second guide plate 34 is engaged. The inclination angle of the guide surface 34 a is set to 30 ° with respect to the upper surface of the chamber base 13. Since the amount of food in the packaging bag is small, even if the guide surface 34a of the second guide plate 34 is reduced to 30 °, the food bag does not leak from the front opening of the packaging bag, and the peripheral edge of the opening of the packaging bag It can be guided to the upper surface of the lower narrow pressure block 21.

  On the other hand, when the amount of liquid food in the packaging bag is large, the hook 34b of the second guide plate 34 is engaged with the mounting hole 33c-1 on the upper side of the first guide plate 31 to guide the second guide plate 34. The inclination angle of the surface 34 a is set to 60 ° with respect to the upper surface of the chamber base 13. Since the amount of food in the packaging bag is large, the guide surface 34a of the second guide plate 34 is increased to 60 ° so that the food does not leak from the front opening of the packaging bag, and the peripheral edge of the front opening of the packaging bag Can be guided to the upper surface of the lower narrow pressure block 21.

  Further, in the heat sealing device 20 configured as described above, the first guide plate 31 of the guide base 30 is detachably attached to the chamber base 13 in order to facilitate the cleaning of the inside of the chamber 12. The first guide plate 31 extends from the lower portion of the standing portion 33 so as to come into contact with the upper surface of the bottom shallow portion 13a at the front portion of the chamber base 13 below the lower narrow pressure block 21, and the standing portion 33 is raised. In this state, the first guide plate 31 is provided with a horizontal plate portion 32 for placing the first guide plate 31 on the upper surface of the bottom shallow portion 13a of the front portion of the chamber base 13. The horizontal plate portion 32 of the first guide plate 31 includes a locking hole portion 32a that engages with an outer peripheral portion of a fixing nut 27 that fixes the elevating cylinder 26, and a lower narrow pressure block 21 that protrudes upward and is in a lowered position. A locking projection 32b that locks to the lower surface is provided. Accordingly, when the horizontal plate portion 32 of the first guide plate 31 of the guide base 30 is placed on the upper surface of the bottom shallow portion 13a of the front portion of the chamber base 13, the peripheral edge portion of the locking hole portion 32a of the horizontal plate portion 32. Is locked to the outer periphery of the fixing nut 27 so that it does not shift in the horizontal direction, and the locking projection 32b is locked to the lower surface of the lower narrow pressure block 21 and does not lift upward. Even if the packaging bag is guided by the guide surface 34a of the guide table 30, the guide table 30 can be prevented from being displaced.

  Although the heat sealing device 20 of the above embodiment is used for the vacuum packaging machine 10, the present invention is not limited to this, and is not used for the vacuum packaging machine 10, but simply for sealing the packaging bag. The heat sealing device 20 may be used.

  In the heat sealing device 20 of the above embodiment, the angle of inclination of the guide surface 34a of the guide table 30 can be changed in two stages of 30 ° and 60 °, but the present invention is limited to this. Instead, the angle may be changed in two or more steps within an angle range of 30 ° to 60 °. Furthermore, the angle range of 30 ° to 60 ° is optimal, but the angle may be changed in two or more steps in the range of 25 ° to 70 °.

  In the heat sealing device 20 of the above-described embodiment, two sets of left and right mounting holes 33 c are provided in the upright portion 33 of the first guide plate 31 as the engaged portions in the vertical direction, and are formed above the second guide plate 34. The pair of left and right hooks 34b are provided as engaging portions that can be engaged with the mounting holes 33c. However, the present invention is not limited to this, and the upright portion 33 of the first guide plate 31 is raised as an engaged portion. A plurality of sets of protrusions may be provided in the vertical direction protruding from 33, and a hole portion may be provided on the upper portion of the second guide plate 34 as an engaged portion to selectively engage with the protrusions.

  In the vacuum packaging machine 10 of the above embodiment, the chamber base 13 is provided with a detachable bottom plate that closes the bottom deep portion 13b between the bottom shallow portions 13a, 13a on both the left and right sides, and the packaging bag accommodated in the chamber base 13 is provided. You may make it change the height with respect to a lower side narrow pressure block.

 DESCRIPTION OF SYMBOLS 13 ... Base (chamber base), 20 ... Heat sealing apparatus, 21 ... Lower side narrow pressure block, 22 ... Upper side narrow pressure block, 23 ... Heater, 30 ... Guide stand, 31 ... 1st guide plate, 32 ... Horizontal Part 32a ... locking hole part 32b ... locking projection part 33 ... standing part 33c (33c-1, 33c-2) ... engaged part (mounting hole) 34 ... second guide plate 34a ... guide Surface, 34b ... engaging portion (hook).

Claims (4)

A lower narrow pressure block provided on the base;
An upper narrow pressure block which is provided on the upper side of the lower narrow pressure block and holds the peripheral edge of the opening opening of a heat-weldable packaging bag containing the packaged object together with the lower narrow pressure block;
A heater that is provided on at least one of the lower and upper narrow pressure blocks, heats and heat-welds the peripheral edge of the opening of the packaging bag held tightly by the lower and upper narrow pressure blocks; and
The base is provided detachably near the lower narrow pressure block of the base and is inclined downward in a direction away from the lower narrow pressure block, from the peripheral edge of the front end opening of the packaging bag to the base bottom side A heat sealing device provided with a guide base that guides a part of the base to a predetermined angle to the upper surface of the base,
The heating and sealing device according to claim 1, wherein the guide table is capable of changing an inclination angle of a guide surface that guides a part of a base end bottom side from a peripheral edge of a front end opening of the packaging bag to an upper surface of the base. In the heat sealing apparatus according to claim 1,
The guide table includes a first guide plate having an upright portion that rises upward near the lower narrow pressure block of the base, and a detachable attachment to the upright portion of the first guide plate, and the packaging A second guide plate having a guide surface for guiding a part of the base end bottom side from the peripheral edge of the front end opening of the bag;
An engaging portion for detachably attaching to the standing portion of the first guide plate on the second guide plate,
The heat sealing device, wherein a plurality of engaged portions that can be engaged with the engaging portion at different positions in the vertical direction are provided on the standing portion of the first guide plate. In the heat sealing apparatus according to claim 2,
The lower narrow pressure block is detachably supported by a support shaft protruding from the upper surface of the base,
A fixing nut is provided on the upper surface of the base to fix an elevating cylinder that elevates and lowers the support shaft in the vertical direction.
The first guide plate extends from a lower portion of the standing portion so as to come into contact with the upper surface of the base on the lower side of the lower narrow pressure block, and the first guide plate is moved in a state where the standing portion is raised. A horizontal plate portion placed on the upper surface of the base is provided. The horizontal plate portion has an engagement hole portion that engages with the outer peripheral portion of the fixing nut, and protrudes upward to engage with the lower surface of the lower narrow pressure block. A heat sealing device provided with a locking projection to be provided. In the heat sealing apparatus according to any one of claims 1 to 3,
The heat sealing device characterized in that the inclination angle of the guide surface of the guide table can be changed in the range of 25 ° to 70, more preferably the inclination angle can be changed in the range of 30 ° to 60 °. .

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