JP2009280257A - Vertical seal mechanism of bag manufacturing and packaging machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vertical seal mechanism which can enhance quality of sealing and can perform a vertical seal at a high speed in a bag manufacturing and packaging machine performing continuously the vertical seal. <P>SOLUTION: The vertical seal mechanism 2 is equipped with a vertical seal member 21 and a conveying apparatus 22. In this case, the vertical seal member 21 is arranged at a seal position separated from the conveying apparatus 22, performs heating and pressing to an overlapping part F2 of a cylindrical film and forms a line seal. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vertical seal mechanism of a bag making and packaging machine having a function of sealing an overlapping portion (vertical seal portion) of a packaging material along a conveyance direction.

  The bag making and packaging machine fills the inside of the bag with an article to be packaged such as snack confectionery while manufacturing the bag with a sheet-like packaging material, and makes the bag. Among them, in a vertical bag making and packaging machine called a pillow packaging machine, a sheet-like film material is formed into a cylindrical shape by a former and a tube, and the vertical edge of the cylindrical packaging material is continuously formed by a vertical sealing mechanism. Then, a cylindrical packaging material is formed by heat sealing (thermal welding). And after filling the inside of the cylindrical packaging material from the tube with the article to be packaged and heat-sealing across the upper end portion of the bag and the lower end portion of the succeeding bag by the horizontal sealing mechanism below the tube, the heat-sealed portion Cut the center of the (horizontal seal part) with a cutter.

  In such a vertical sealing mechanism provided in a bag making and packaging machine, a sheet-like packaging material is wound around a tube, formed into a cylindrical shape, and then vertically sealed against the packaging material that is continuously conveyed by a conveying device. The vertical heater of the mechanism is brought into contact, and the edges of the packaging material are joined to form a vertical seal portion. In order to increase the speed of bag-making packaging, a continuous vertical seal mechanism has been proposed in which a packaging material is continuously conveyed and bag-making packaging is continuously performed (Patent Document 1).

  In the continuous vertical seal mechanism disclosed in Patent Document 1, a film spring band spring is provided at a position facing a vertical heater on a tube that forms a cylindrical shape. The film is sandwiched between a vertical heater and a film-bonding strip spring, and is heated and crimped while being continuously sealed.

  In addition, a vertical seal mechanism has been proposed that forms lines in the vertical seal portion by intermittently closing and opening the vertical heater with the intermittent operation of the bag making and packaging machine (Patent Document 2).

Further, a mechanism for continuously forming a streak seal is generally used frequently in a horizontal pillow machine. As an example, as shown in FIG. 8, the film is conveyed by driving a feed roller pair 61 and a pressure roller pair 63. Here, zigzag-shaped grooves are formed in the feed roller pair 61 and the pressure roller pair 63 in order to make a line in the seal portion. A pair of heating blocks 62 in a non-contact state are installed between the feed roller pair 61 and the pressure roller pair 63. The film conveyed by driving the feed roller pair 61 and the pressure roller pair 63 is preheated by the heating block 62 and continuously sealed by the pressure bonding of the pressure roller pair 63.
Japanese Patent Laid-Open No. 5-4608 JP2008-18997

  However, in the continuous vertical seal mechanism disclosed in Patent Document 1, the shape of the seal portion formed on the packaging material is a flat lap seal shown in FIG. On the other hand, in the markets of Asian countries including Japan, vertical streak seals having vertical streaks in the vertical seal part, that is, pinch seals shown in FIGS. 11 (a) and 11 (b) are preferred.

  Further, the continuous vertical sealing mechanism disclosed in Patent Document 2 requires a drive mechanism that intermittently closes and opens the vertical heater, which increases the size of the entire bag making and packaging machine. Moreover, since the vertical seal is intermittently formed, it cannot be applied to a bag making and packaging machine that continuously performs bag making and packaging.

  Furthermore, if the streak seal forming mechanism used in the conventional horizontal pillow machine is applied to the vertical pillow machine as it is, the distance from the former part to the seal part in the vertical pillow machine is shorter than that in the horizontal pillow machine. The film is easy to meander. Also, when the horizontal pillow machine is repeatedly started and stopped, in the case of a film with poor thermal conductivity, the length H portion in FIG. 8 is cooled because the film is cooled at the time of stopping, and overheating is insufficient at the time of restart. Defects occur.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a vertical sealing mechanism capable of performing vertical sealing at high speed while achieving high quality of sealing in a bag making and packaging machine that performs vertical sealing continuously.

  A vertical sealing mechanism of a bag making and packaging machine according to a first aspect of the present invention is a vertical sealing mechanism of a bag making and packaging machine that continuously seals a portion of a cylindrically formed packaging material that overlaps in the vertical direction. And a vertical seal member. The vertical seal member heats and presses the packaging material to form a streak seal. A conveyance apparatus is arrange | positioned in the position spaced apart from the vertical seal member, and conveys a packaging material continuously below.

  In this vertical seal mechanism, the vertical seal member is not only a heating unit but also a pressurizing unit and a line forming unit. The packaging material that has been continuously conveyed from the conveying device is heated and pressurized by the vertical seal member at a sealing position away from the conveying device, and a streak seal is continuously formed.

  In the conventional vertical seal mechanism, since the streak seal is continuously formed, the heating means and the pressurizing means are separated from each other, and both the heating and pressurizing conditions are not satisfied when the film transport is interrupted and re-transported. There is a possibility that a seal portion is generated and waste packaging material is generated.

  In the present invention, the vertical seal member is not only a heating unit but also a pressurizing unit and a streak forming unit. Therefore, the streak seal can be formed continuously. Further, since there is no seal location where both the heating and pressurizing conditions are not satisfied at the same time, no waste packaging material is generated even when the film transport is interrupted and transported again.

  The vertical seal mechanism of the bag making and packaging machine according to the second invention is the vertical seal mechanism of the first invention, wherein the vertical seal members are arranged so as to face each other with a minute gap. It is constituted by a heating block. Moreover, it has an opposing surface provided with the injection hole in the edge part of a pair of opposing heating block. Furthermore, the opposing surface is provided with serrations of vertical stripes in which irregularities are alternately arranged.

  Here, the sealing portion of the packaging material is heated by the first and second heating blocks arranged to face each other with a minute gap. Since there is a minute gap between the two heating blocks, the packaging material can be continuously sent to the gap, and bag making and packaging can be performed continuously.

  Moreover, heating and pressurization are performed by spraying toward the packaging material from the spray holes on the opposing surfaces provided at the ends of the pair of opposed heating blocks. Furthermore, because the opposing surface is provided with serrations of vertical stripes in which irregularities are alternately arranged, streaks are formed in the seal portion of the packaging material due to the flow of high-temperature and high-pressure air injected toward the packaging material. The

  Thereby, one vertical seal member can serve as a heating unit, a pressurizing unit, and a streak forming unit.

  The longitudinal seal mechanism of the bag making and packaging machine according to the third aspect of the present invention is the longitudinal seal mechanism of the second aspect of the present invention, and a passage for allowing high-temperature and high-pressure air to pass through is provided inside the heating block. Here, high-temperature and high-pressure air is sent into a passage provided inside the heating block, and heated by being injected toward the packaging material from the injection holes on the opposing surfaces provided at the ends of the opposed pair of heating blocks. Pressure can be performed.

  The vertical sealing mechanism of the bag-making packaging machine according to the fourth invention is the vertical sealing mechanism of either the second or third invention, wherein the length of the first heating block in the packaging material conveyance direction is the second heating block. It is shorter than the length. In addition, an elastic rotating roller is provided immediately below the first heating block, and the rotating roller is disposed at a position in contact with the opposing surface of the second heating block.

  Here, two heating blocks having different lengths are arranged at opposing positions, and an elastic rotating roller is arranged under the heating block having a short length. During the sealing operation, first, a streak seal is formed by the first and second heating blocks. Thereafter, the rotating roller of the elastic body comes into contact with the opposing surface of the second heating block, so that the pressing force is strengthened, and for example, even in the case of a packaging material having a particularly large thickness or a film having poor thermal conductivity, it is surely sealed be able to.

A vertical sealing mechanism of a bag making and packaging machine according to a fifth aspect of the present invention is the vertical sealing mechanism according to any of the second and third aspects of the present invention, and further includes a compressor. During the sealing operation of the vertical seal member, high-temperature and high-pressure air is sent from the compressor to the passages provided in the first and second heating blocks, and the high-temperature and high-pressure air is injected from the injection holes provided in the opposing surface.
Here, pressurization can be performed by a simple method by injecting high-temperature and high-pressure air from the injection holes provided in the facing surface.

  A vertical sealing mechanism of a bag making and packaging machine according to a sixth aspect of the present invention is the vertical sealing mechanism of the first aspect, wherein the conveying device is provided under the vertical sealing member and is a vacuum belt.

  Here, the tension | tensile_strength of the packaging material in a sealing position can be maintained by arrange | positioning a conveying apparatus under a vertical seal member. Moreover, since a vacuum belt is employed and the entire belt surface is in surface contact with the packaging material, a stable film feed speed and feed direction can be maintained.

  A vertical sealing method for a bag making and packaging machine according to a seventh aspect of the invention is a vertical sealing method for a bag making and packaging machine that continuously seals a portion of a cylindrically formed packaging material that overlaps in the vertical direction. A conveying step for continuously conveying, and a vertical sealing step for injecting high-temperature and high-pressure air into a portion overlapping the longitudinal direction of the packaging material.

  Here, heating and pressurization can be simultaneously performed by injecting high-temperature and high-pressure air onto a portion overlapping the longitudinal direction of the packaging material while continuously conveying the packaging material. Further, by adjusting the injection position of the high-temperature and high-pressure air or adjusting the injection pressure at each injection position, it is possible to form a streak in the sealing portion of the packaging material.

  A vertical sealing mechanism of a bag making and packaging machine according to an eighth aspect of the present invention is a vertical sealing mechanism of a bag making and packaging machine that continuously seals a portion of a cylindrically formed packaging material that overlaps in the vertical direction. 1st and 2nd block arranged in the position which opposes both sides of the part which overlaps in the lengthwise direction with a minute gap is formed in the 1st block, the injection hole for injecting the high temperature high pressure air is formed Has been.

  Here, there is no separate packaging material conveying member as the vertical seal mechanism, and the packaging material is continuously conveyed by a conveying member unique to the bag making packaging machine such as a pull-down belt. Moreover, high-temperature high-pressure air is injected into a portion overlapping the longitudinal direction of the packaging material from the injection hole for injecting high-temperature high-pressure air provided in the first block which is one of the first and second blocks. Spraying can be performed simultaneously with heating and pressurization.

  Further, by adjusting the injection position of the high-temperature and high-pressure air or adjusting the injection pressure at each injection position, it is possible to form a streak in the sealing portion of the packaging material.

  According to the vertical sealing mechanism of the present invention, in a bag making and packaging machine that continuously performs vertical sealing, it is possible to form a streak on the vertical sealing surface of the packaging bag, to improve the quality of the seal, and to perform vertical sealing at high speed. It can be carried out.

  A bag making and packaging machine according to an embodiment of the present invention will be described with reference to the drawings.

[Overall configuration of bag making and packaging machine]
The bag making and packaging machine 100 is a machine that manufactures a bag by covering food such as potato chips to be packaged with a film and sealing the tubular film F vertically and horizontally. As shown in FIG. 1, the bag making and packaging machine 100 mainly includes a film supply portion (not shown) for supplying a film F as a packaging material, and a film F sent in a sheet form from the film supply portion. A forming mechanism 1 that forms the film, a pull-down belt mechanism that conveys the tubular film F (hereinafter referred to as a tubular film) downward, and a vertical sealing mechanism 2 that vertically seals the overlapping portion of the tubular film. And a horizontal sealing mechanism 3 that seals the upper and lower ends of the bag B by horizontally sealing the tubular film.

  The articles to be packaged fall into the tube 11 by a predetermined amount from a weighing machine (not shown) provided above the bag making and packaging machine 100. On the other hand, the packaging material film F is fed in a sheet form from the film supply unit, is formed into a cylindrical shape by the forming mechanism 1, is vertically sealed to the tubular film by the vertical sealing mechanism 2, and is horizontally sealed by the horizontal sealing mechanism 3. The upper and lower ends of the bag B are sealed.

<Molding mechanism 1>
The forming mechanism 1 includes a tube 11 and a former 12. The tube 11 is a cylindrical member and has upper and lower ends opened. Potato chips C weighed with a weighing machine are put into the opening at the upper end of the tube 11. The former 12 is disposed so as to surround the tube 11. The shape of the former 12 is such that the sheet-like film F fed out from the film roll is formed into a cylindrical shape when passing between the former 12 and the tube 11. Further, the tube 11 and the former 12 of the forming mechanism 1 can be replaced according to the size of the bag to be manufactured.

<Pull-down belt mechanism 13>
The pull-down belt mechanism 13 is a mechanism that adsorbs and transports the cylindrical film wound around the tube 11 and is provided behind the tube 11 when viewed from the front of the bag making and packaging machine 100 as shown in FIG. ing. In the pull-down belt mechanism 13, a belt having an adsorption function is rotated by a driving roller and a driven roller (not shown) to carry the cylindrical film downward.

<Vertical seal mechanism 2>
As shown in FIG. 1, the vertical sealing mechanism 2 applies heat and pressure to the overlapping portion (F2 in FIG. 2) of the tubular film F wound around the tube 11, and seals along the vertical direction (conveying direction). This is a mechanism for forming a portion (shaded portion F1 in FIG. 1). Further, the seal portion F1 of the packaging material formed by the vertical seal mechanism 2 has vertical stripes, and has the shape of the pinch seal of FIG.

  As shown in FIGS. 2 and 3, the vertical sealing mechanism 2 includes a vertical sealing member 21 and a conveying device 22. In FIG. 3, the vertical seal member 21 is constituted by a pair of metal rectangular parallelepiped heating blocks 21 </ b> A and 21 </ b> B, and has a heating source (not shown) inside. The heating blocks 21A and 21B are disposed on both sides of the overlapping portion F2 of the tubular film F. The conveying device 22 is a pair of vacuum belts 22 </ b> A and 22 </ b> B, and is disposed under the vertical seal member 21.

  4 is a perspective view of the vertical seal member 21, and FIG. 5 is a plan view. As shown in FIGS. 4 and 5, the heating blocks 21A and 21B are arranged at positions facing each other with a minute gap, and the first and second serrations 213A are provided on the first and second facing surfaces 211A and 211B. 213B is formed. FIG. 6 is a perspective view of the heating block 21B. Since the heating block 21A and the heating block 21B have the same structure, only the heating block 21B will be described here.

  A passage 214B is provided inside the heating block 21B, and an injection hole 215B is provided in the serration 213B provided on the facing surface 211B.

<Horizontal seal mechanism 3>
The horizontal sealing mechanism (horizontal sealing portion) 3 is disposed under the forming mechanism 1, the pull-down belt mechanism 13, and the vertical sealing mechanism 2. The horizontal sealing mechanism 3 has a pair of sealing jaws 31 incorporating a heater. The pair of sealing jaws 31 are positioned on the front side and the rear side of the tubular film, respectively, and turn to draw a substantially D-shaped trajectory T that is symmetrical in the longitudinal direction. In the middle of turning, the tubular film is sandwiched in a state where the pair of sealing jaws 31 are pressed against each other, and pressure and heat are applied to the portions of the tubular film that are the upper and lower ends of the bag to seal.

  A cutter (not shown) is built in one of the sealing jaws 31. This cutter plays a role of separating the bag B and the subsequent tubular film Fm at the center position in the height direction of the horizontal seal portion by the seal jaw 31.

[Operation of bag making and packaging machine]
When the bag making and packaging machine 1 is operated, the packaging material film F is sent in sheet form from the film supply unit. In the forming mechanism 1, the cylindrical film wound around the tube 11 by the former 12 is conveyed to the vertical sealing mechanism 2 by the pull-down belt mechanism 13. In the vertical sealing mechanism 2, the overlapping portion F2 of the tubular film F is sent to a minute gap between the first and second opposing surfaces 211A and 211B of the heating blocks 21A and 21B. At the same time, pressurized air of 0.5 MPa sent from the outside or by a compressor passes through the first and second passages 214A and 214B provided in the heating blocks 21A and 21B, and the first and second opposing surfaces. It is injected from the first and second injection holes 215A and 215B provided in 211A and 211B. Since the heating blocks 21A and 21B are heated to 150 to 200 ° C. by a heating source (not shown), pressure is injected from the first and second injection holes 215A and 215B via the first and second passages 214A and 214B. Air also becomes high-temperature and high-pressure air heated to 150 to 200 ° C. The seal portion F1 is formed by blowing high-temperature and high-pressure air having a temperature of 150 to 200 ° C. and a pressure of 0.5 MPa from both sides of the overlapping portion F2 of the tubular film F.
Further, since the first and second opposing surfaces 211A and 211B are formed with the first and second serrations 213A and 213B, the high-temperature and high-pressure air blown toward the overlapping portion F2 of the tubular film F A streak is formed in the seal portion F1 by the flow.

  Further, when the vertical seal member 21 performs sealing by driving the pair of vacuum belts 22A and 22B disposed below the vertical seal member 21, the tension of the tubular film at the seal position can be maintained. Further, since the vacuum belts 22A and 22B are in surface contact with the packaging material film, a stable film feed speed and feed direction can be maintained.

[Features of this bag making and packaging machine]
(1)
In the continuous vertical seal mechanism disclosed in Patent Document 1, a film spring band spring is provided at a position facing a vertical heater on a tube that forms a cylindrical shape. The film is sandwiched between a vertical heater and a film-bonding strip spring, and is heated and crimped while being continuously sealed. Under the present circumstances, the shape of the seal part formed in a packaging material is a flat lap seal shown in FIG. Further, as a vertical heater, the steel belt can change the speed according to the film feed speed, and the seal pressure can be manually adjusted by an air pressure regulator. Further, the steel belt can be loaded with a stable temperature and pressure by surface contact with the entire belt surface, and a high-quality seal can be obtained. Furthermore, by making the speed of the steel belt slightly faster than the film, a very flat seal can be obtained as well as the effect of stretching the iron.

  However, among the flat seals, the lap seal shown in FIGS. 10A and 10B has a low tear strength on the vertical sealing surface of the packaging bag, and there remains anxiety about the sealing performance. Further, in the fin seal shown in FIGS. 10C and 10D, the tear strength and the sealing performance can be improved, but the thickness of the sealing surface increases, so that the time for heat sealing becomes longer, and consequently the packaging. The time for manufacturing the bag also becomes longer.

  In the continuous vertical seal mechanism disclosed in Patent Document 2, the vertical heater is intermittently closed and opened along with the intermittent operation of the bag making and packaging machine, thereby forming a line in the vertical seal portion. However, here, a drive mechanism for intermittently closing and opening the vertical heater is required, which increases the size of the entire bag making and packaging machine. Moreover, since the vertical seal is intermittently formed, it cannot be applied to a bag making and packaging machine that continuously performs bag making and packaging.

  Furthermore, in order to apply the streak seal forming mechanism used in the conventional horizontal pillow machine to the vertical pillow machine as it is, it has the following problems.

  First, in the horizontal pillow machine, the film is conveyed linearly from the film roll to the seal portion, there is little fluctuation of disturbance factors such as frictional resistance, and the film is easy to go straight without meandering. However, in the vertical pillow machine, the film path is bent at the former part and is not a linear mechanism, and meandering is likely to occur due to a change in sliding force due to the elasticity of the film, the finish of the former, and the like. In addition, when forming a cylindrical film from a flat film with a vertical pillow machine, the longer the distance from the former part to the seal part, the easier it is to form stably from the bag forming side. An increase in the distance to the section leads to an increase in the falling distance of the article, which is a harmful effect of high-speed operation. Therefore, in the vertical pillow machine, the distance from the former part to the seal part is shorter than in the horizontal pillow machine, and the film is easy to meander.

  Next, as shown in FIG. 9, the film is conveyed by the collaborative action of the four rollers of the pull-down belt 65, the feed roller pair 61, and the pressure roller pair 63, and these rollers 61 and 63 are parallel to each other. High-precision adjustment is required to synchronize the degree and feed speed and the speed of the pull-down belt 65. Further, since the former and the tube of the vertical pillow packaging machine are made of sheet metal and have errors, it is difficult to ensure the roundness of the tube itself, the film flutters, and the meandering occurs.

  Furthermore, when starting and stopping are repeated, in the case of a film with poor thermal conductivity, the portion of length H in FIG. 8 is cooled when stopped, and overheating is insufficient during restart, resulting in poor sealing. .

  On the other hand, in the above embodiment, as shown in FIGS. 1 and 2, the vertical sealing mechanism 2 of the bag making and packaging machine 100 includes the vertical sealing member 21 and the transport device 22. Here, the vertical seal member 21 is disposed at a seal position away from the conveying device 22, and applies heat and pressure to the overlapping portion F <b> 2 of the tubular film F and forms a streak seal. In the vertical sealing mechanism 2, the vertical sealing member 21 is a heating unit, a pressure unit, and a streak forming unit. The packaging material continuously conveyed from the pull-down belt 13 is heated and pressurized by the vertical seal member 21 at a sealing position away from the conveying device, and a streak seal is continuously formed.

  In the conventional vertical seal mechanism, since the streak seal is continuously formed, the heating means and the pressurizing means are separated from each other, and both the heating and pressurizing conditions are not satisfied when the film transport is interrupted and re-transported. There is a possibility that a seal portion is generated and waste packaging material is generated. In the vertical seal mechanism 2 of the present embodiment, there is no seal location where both the heating and pressurization conditions are not satisfied at the same time, so no waste packaging material is generated even when the film transport is interrupted and transported again.

(2)
In the vertical sealing mechanism 2 of the bag making and packaging machine 100 of the present embodiment, the vertical sealing member 21 includes a first heating block 21B and a second heating block 21A having a heating source therein. Further, as shown in FIGS. 4 and 5, the heating blocks 21A and 21B are arranged at positions facing each other with a minute gap, and the first and second opposing surfaces 211A and 211B have first and second opposing surfaces. Serrations 213A and 213B are formed. Moreover, the injection hole 215B is provided in the serration 213B provided in the opposing surface 211B.

  Here, the overlapping portion F2 of the tubular film F is continuously sent to the gap between the heating blocks 21A and 21B arranged to face each other. At the same time, for example, high-temperature and high-pressure air is fed into the first and second passages 214A and 214B provided in the heating blocks 21A and 21B. The high-temperature and high-pressure air heated via the first and second passages 214A and 214B is jetted from the first and second injection holes 215A and 215B toward the packaging material, and the sealing portion is heated and heated by hot air. F1 is formed. Furthermore, since the first and second opposing surfaces 211A and 211B are formed with the first and second serrations 213A and 213B, the high-temperature and high-pressure air blown toward the overlapping portion F2 of the tubular film F A streak is formed in the seal portion F1 by the flow.

(3)
In the vertical sealing mechanism 2 of the bag making and packaging machine 100 of the present embodiment, a pair of vacuum belts 22 </ b> A and 22 </ b> B are disposed under the vertical sealing member 21. When the vertical sealing member 21 performs sealing, the tension of the tubular film at the sealing position can be maintained by the pair of vacuum belts 22A and 22B. Further, since the vacuum belts 22A and 22B are in surface contact with the packaging material film, a stable film feed speed and feed direction can be maintained.

[Other Embodiments]
As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of invention.

(A)
In the said embodiment, although the vertical seal member 2 gave and demonstrated the example comprised by the 1st heating block 21A and the 2nd heating block 21B of a metal rectangular parallelepiped shape which have the same structure, this book The invention is not limited to this.

  For example, as shown in FIG. 7, the length of the first heating block 21A in the packaging material conveying direction is shorter than the length of the second heating block 21B, and an elastic rotating roller is provided directly below the first heating block 21A. The structure which arrange | positions 213 and arrange | positions in the position where the rotating roller 213 contacts the opposing surface of the 2nd heating block 21B may be sufficient.

  Here, during the sealing operation, first, a streak seal is formed by the first heating block 21A and the second heating block 21B. After that, the elastic rotating roller 213 comes into contact with the opposing surface of the second heating block 21B, so that the pressing force is strengthened. For example, even in the case of a packaging material having a particularly large thickness or a film having poor thermal conductivity, it is ensured. Can be sealed.

(B)
In the above-described embodiment, the pair of vacuum belts 22A and 22B are provided as the conveying device, but a pair of rotating rollers may be provided instead of the vacuum belt.

(C)
In the above embodiment, an example in which high-temperature and high-pressure air is sent by a compressor has been described. However, the present invention is not limited to this. For example, even if high-temperature and high-pressure air is introduced from the outside by a pipe, the same effect as described above can be obtained.

(D)
In the above embodiment, a passage through which high-temperature and high-pressure air passes is formed inside both the first heating block 21A and the second heating block 21B, but either the first heating block 21A or the second heating block 21B. A passage may be formed only in the case.

  Further, no passage is formed in the first heating block 21A and the second heating block 21B, only the injection holes for injecting the high-temperature and high-pressure air are formed, and the high-temperature and high-pressure air sent from the outside is packaged from the injection holes. By spraying onto the overlapping portion (seal portion) of the material, the same effect as described above can be obtained.

(E)
In the above embodiment, the pair of vacuum belts 22A and 22B are provided as the conveying member of the vertical seal mechanism. However, instead of the pair of vacuum belts, only one vacuum belt may be provided.

  Further, the vertical sealing mechanism itself does not have a separate packaging material conveying member, and the packaging material can be continuously conveyed by a conveying member unique to the bag making and packaging machine such as a pull-down belt.

  The longitudinal sealing mechanism of the bag making and packaging machine of the present invention has a function of continuously longitudinally sealing the overlapping portions of the packaging material along the conveying direction and forming a line on the sealing surface of the packaging material. Therefore, it can be widely applied to the vertical sealing mechanism of the bag making and packaging machine.

Schematic which shows the structure of the bag making packaging machine which concerns on one Embodiment of this invention. The side view of the vertical seal | sticker mechanism of FIG. The front view of the vertical seal | sticker mechanism of FIG. The perspective view of a vertical seal member. The front view of a vertical seal member. The perspective view of a heating block. The front view of the vertical seal | sticker mechanism which concerns on other embodiment of this invention. The front view of the conventional vertical seal mechanism. The side view of the conventional vertical seal mechanism. Schematic of a seal formed by a conventional vertical seal mechanism. Schematic of a seal formed by a vertical seal mechanism according to an embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Forming mechanism 11 Tube 12 Former 13 Pull-down belt mechanism 2 Vertical sealing mechanism 21 Vertical sealing member 21A 1st heating block 21B 2nd heating block 211A 1st opposing surface 211B 2nd opposing surface 213A 1st serration 213B 2nd serration 214A 1st Passage 214B Second Passage 215A First Injection Hole 215B Second Injection Hole 22 Vacuum Belt 31 Sealing Jaw F Packaging Material Film F1 Heat Sealing Part F2 Overlapping Part B Bag

Claims (8)

In the vertical sealing mechanism of the bag making and packaging machine that continuously seals the overlapping portion of the packaging material formed in a cylindrical shape in the vertical direction,
A vertical seal member that forms a streak seal by applying heat and pressure to the packaging material;
A conveying device that is disposed at a position spaced apart from the vertical seal member, and conveys the packaging material continuously downstream;
A vertical sealing mechanism for a bag making and packaging machine. The vertical seal member includes a first heating block and a second heating block disposed at positions facing each other with a minute gap therebetween,
The opposing surfaces of the first and second heating blocks are provided with serrations of vertical stripes in which irregularities are alternately arranged,
An injection hole for injecting high-temperature and high-pressure air is formed on the facing surface of the first heating block.
The vertical sealing mechanism of the bag making and packaging machine according to claim 1. Inside the first heating block, a passage for passing high-temperature and high-pressure air is provided,
The vertical sealing mechanism of the bag making and packaging machine according to claim 2. The length of the first heating block in the packaging material conveyance direction is shorter than the length of the second heating block,
An elastic rotating roller is provided under the first heating block, and is arranged at a position in contact with the facing surface of the second heating block.
A vertical sealing mechanism for a bag making and packaging machine according to claim 2 or 3. A compressor,
During the sealing operation of the vertical seal member, high-temperature and high-pressure air is sent from the compressor to a passage provided inside the first heating block, and high-temperature and high-pressure air is injected from the injection holes provided in the facing surface. To
The longitudinal seal mechanism of the bag making and packaging machine according to claim 3 or 4. The transport device is a vacuum belt provided under the vertical seal member.
The vertical sealing mechanism of the bag making and packaging machine according to claim 1. In the vertical sealing method of the bag making and packaging machine that continuously seals the overlapping portion of the packaging material formed in a cylindrical shape in the vertical direction,
A transporting step for continuously transporting the packaging material;
A vertical sealing step of injecting high-temperature and high-pressure air into a portion overlapping the longitudinal direction of the packaging material;
With
Vertical sealing method for bag making and packaging machines. In the vertical sealing mechanism of the bag making and packaging machine that continuously seals the overlapping portion of the packaging material formed in a cylindrical shape in the vertical direction,
Comprising first and second blocks disposed at opposite positions with a minute gap on both sides of a portion of the packaging material overlapping in the vertical direction;
The first block is formed with an injection hole for injecting high-temperature and high-pressure air.
Vertical seal mechanism for bag making and packaging machines.

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