JPS6212085B2 - - Google Patents

Description

Sealing devices 84, 60 for sealing Vacuum packaging equipment for packaging bags consisting of.

[Detailed description of the invention]

INDUSTRIAL APPLICATION FIELD This invention relates to a vacuum packaging device for packaging bags that can quickly and reliably perform degassing from a packaging bag containing an object to be packaged and sealing the bag.

Prior Art Fresh foods and other articles (hereinafter referred to as "packaged items") are packed into packaging bags made of film packaging material with excellent airtightness, and the remaining air inside the bags is degassed under vacuum. Vacuum packaging, which produces vacuum-packed items by sealing them with heat welding, is extremely effective in preventing deterioration and long-term storage of packaged items, as it can isolate contact with oxygen and bacteria in the air. In recent years, it has come to be widely used in various industrial fields.

As a specific means for applying vacuum packaging to the packaging bags, for example, "Packaging Machines and Mechanisms" (1976)
Published by Japan Packaging Machinery Association (November 2nd)
As described on pages 204 to 212 of A method is known in which a packaging bag is placed in a vacuum chamber and the vacuum chamber is degassed to indirectly seal the packaging bag. has also been proposed. In general, the latter degassing method using a vacuum chamber is widely used in view of the fact that a relatively large number of packaging bags can be subjected to vacuum processing at the same time.

Problems to be Solved by the Invention However, in this vacuum chamber degassing method, as described in the above-mentioned "Packaging Machinery and Mechanism" magazine, by directly depressurizing the inside of the vacuum chamber, Since this method indirectly deaerates the packaging bags placed in the tank, the deaeration process inevitably takes time and the processing capacity is low (even with large machines, the processing capacity is 70% per minute).
There was also a problem in terms of the degree to which vacuum could be achieved. Furthermore, before performing vacuum suction on the packaging bag, preparations are made in which the packaging bag in the open state is placed on a tray in the vacuum chamber, and the vicinity of the opening edge is set so that it can be compressed by a heat-sealing heater bar. In addition, shrinkage of the packaging bag during degassing causes misalignment of the opening edge of the bag and the heater bar, resulting in disadvantages such as misalignment of the seal line. In addition, since it is necessary to vacuum the entire vacuum chamber, a large-capacity vacuum pump is required, which is uneconomical.

Further, as the above-mentioned vacuum packaging method in which a nozzle is inserted into the opening of a packaging bag and internal air is directly sucked, there is, for example, the invention described in Japanese Patent Application Laid-open No. 59189/1989. Invention related to this prior art "packaging device"
As shown in FIGS. 1 and 2 attached to the publication, a side seal mechanism 8 is arranged on either the left or right sides of the feed conveyor 3, and the side seal mechanisms 8 are arranged on the left and right sides of the feed conveyor 3, so that the left and right sides of the product S sent by the feed conveyor 3 are sealed. The present invention relates to a packaging device in which the product S is side-sealed and packaged by the side sealing mechanism 8 with a film F extending in a cylindrical shape on one or both sides of the product S. Chains 19, 20, etc. are stretched between a plurality of sprockets 18, etc. on either the right and left sides of the conveyor 3, and the chains 19, 20, etc. are stretched between a plurality of sprockets 18, etc.
9, 20, etc., and by rotating the chains 19, 20, etc. between the sprockets 18, etc., the tip opening of the suction pipe 21 is opened to the cylindrical projecting film F. The content is that the film F is inserted into the inside and the inside of the film F is side-sealed while being depressurized.

However, the invention described in this publication seems to have various drawbacks from the standpoint of efficiently degassing and welding and sealing a large number of packaging bags one after another by vacuum suction. That is, while the film F filled with the product S is conveyed on the conveyors 2 and 3, the suction pipe 21 is inserted inside the cylindrical projecting portion of the film F to deaerate the film. In this case, if the weight of product S is not equivalent,
There is a risk that the film F may be displaced on the conveyor due to contact when the pipe is inserted, resulting in misalignment.
In addition, in order to smoothly insert the suction pipe 21 into the film F, the volume (height dimension) of the supplied product S is set to be sufficiently large so that the opening of the film F formed in a cylindrical shape is must be made to open naturally depending on the height of product S,
This limits the form and type of products to be packaged. Moreover, the vacuum degassing of the film F filled with the product S by the suction pipe 21 is carried out by the conveyor 3 equipped with a side seal mechanism.
Since the process starts when the vacuum packaging reaches the starting point of the vacuum packaging, combined with the above-mentioned drawbacks, it is considered difficult to apply vacuum packaging to a large number of packaging bags one after another at high speed.

The above-mentioned drawbacks pointed out in this prior art invention are generally common to other commercially available nozzle degassing type vacuum packaging devices.
This seems to be due to the fact that the problems listed below have not been solved individually or comprehensively.

(a) In order to perform vacuum packaging using nozzle degassing at high speed and in large quantities, packaging bags filled with items to be packaged are sequentially fed onto a conveyor line, and a vacuum suction nozzle is inserted into the opening of the packaging bags that arrive one after another. It is necessary to stably position the packaging bag so that it can be inserted accurately. However, in the conventional mechanism, the packaging bag becomes misaligned during transportation, making it difficult to insert the nozzle, and therefore cannot be adapted to high-speed processing.
In addition, misalignment of the bag results in "misalignment" of the sealed area around the bag opening after degassing, resulting in a decrease in product value due to poor sealing and the like.

(b) In order to smoothly insert the vacuum suction nozzle into the opening of the packaging bag, the opening must be sufficiently open. However, in conventional mechanisms, no effective means has yet been proposed for reliably opening the opening prior to the degassing step.

(c) Insert the vacuum suction nozzle into the opening of the packaging bags that arrive one after another with accurate timing, and with the nozzle inserted, apply vacuum suction and seal welding (sealing) by tightly sealing the opening, and then remove the nozzle. Highly efficient vacuum packaging processing is achieved by extracting the material from the opening, but a mechanism that satisfies this comprehensively has not been developed.

Purpose of the Invention The present invention has been devised in view of the above-mentioned study results, and solves the above-mentioned drawbacks inherent in the conventional vacuum packaging method using nozzle degassing. An object of the present invention is to provide a vacuum packaging device capable of performing vacuum packaging processing. More specifically, when a packaging bag filled with the object to be packaged is placed on a conveyance line and conveyed sequentially downstream, the packaging bag is placed on a conveyance means such as a conveyor,
To hold the packaging bag stably so that it will not easily shift, and to open the opening of the packaging bag so that it can be held in a sequential manner, regardless of the shape or bulk of the packaged item. , To quickly and reliably insert a vacuum suction nozzle into the opening of a packaging bag, and with the vacuum suction nozzle inserted into the opening of the packaging bag, perform vacuum suction to perform deaeration while being conveyed by a conveying means; At this time, the nozzle and the packaging bag should be stably held and no positional shift would occur; While stably holding the nozzle, weld and seal the opening inward from the nozzle tip,
Achieving a high degree of vacuum attainment, etc. are the problems to be solved by the present invention. Thereby, smooth vacuum packaging processing of a large amount of packaging bags can be achieved at high speed.

Means for Solving the Problems In order to overcome the above-mentioned problems and achieve the initial objective, the vacuum packaging apparatus according to the present invention forms a negative pressure zone on the surface of the conveyor belt and transfers the packaging bag to the surface of the belt. A suction belt transports the packaging bag in a predetermined direction in a fixed state, and a suction belt is arranged on the side of the suction belt and blows air toward the opening of the packaging bag supported by the suction belt. An air supply nozzle for sufficiently opening this opening, a conveyor belt arranged adjacent to the adsorption belt in an aligned manner downstream in a predetermined conveyance direction to convey the packaging bag, and a conveyor belt above the conveyor belt. a presser belt that is arranged in parallel with adjustable intervals and runs in synchronization with the belt, and conveys the packaging bag in a predetermined direction while holding the packaging bag between it and the conveyor belt; and a presser belt that is adjacent to the sides of both belts. A large number of packaging bags are disposed at predetermined intervals on an endless support body that is arranged and circulates synchronously with the belt, and the openings of the packaging bags, which are pinched by the conveyor belt and the presser belt, are fully opened. A vacuum suction nozzle that is automatically inserted into the opening and automatically pulled out from the opening when degassing and welding and sealing are completed, and the vicinity of the opening of the packaging bag in which the vacuum suction nozzle is inserted, a pair of elastic belts that are closely pressed together by opposing belt surfaces and run in synchronization with the nozzle; and the package into which the vacuum suction nozzle is inserted and tightly pinched and pressed by the pair of elastic belts. It consists of a sealing device that performs sealing welding around the opening of the bag.

Embodiments Next, the vacuum packaging apparatus according to the present invention will be described below with reference to preferred embodiments and with reference to the accompanying drawings.

FIG. 1 shows a schematic configuration of a series of vacuum packaging lines to which an embodiment of the apparatus of the present invention is preferably applied. This vacuum packaging line includes a bag making and filling section 12, a packaging bag opening section 14, and a vacuum packaging section 1 along the conveyance path of the packaged items 10.
It is roughly divided into three blocks of 6. Of these, the bag making and filling section 12 itself is well known, and includes:
In addition to this, various other variations exist, as will be explained in connection with FIGS. 2 and 3. Therefore, the vacuum packaging apparatus according to the present invention can be understood as an organic combination of the open section 14 and the vacuum packaging section 16 of the packaging bag. In the embodiment shown in FIG. 1, the packaging bag 36 is transported horizontally with its opening sideways, and the vacuum suction nozzle 66 is inserted horizontally into the opening.
Place the packaging bag vertically with the opening facing upwards.
Of course, a configuration in which the vacuum suction nozzle is inserted in a hanging manner is also fully practical.

(About the bag-making-filling section) Prior to explaining the configuration of the vacuum packaging apparatus according to the present invention, the bag-making-filling section 12 will be briefly explained. Packaging that is rolled into an airtight seal and can be heat-sealed by heat welding, etc. The film 18 is fed out by a pair of tension rollers 20, the running direction is changed by a turning bar 22, and the film is folded by a former (bag-making device) 24 to form a continuous film having a horizontal U-shape in cross-section. .

Pushers 30 having the shape shown in the figure are arranged at predetermined intervals on an endless chain 28 that is wound around a sprocket 26 and circulates, and the pushers 30 move the packaged object 10 into the film 18 formed into the horizontal U-shape.
Send it in between. The film 18 holding the packaged object 10 is conveyed on the conveyor 32, and
The conveyor 32 is heated and fused and cut in the lateral direction at predetermined intervals by heating cutting blades 34 (the main body operating part is not shown) disposed vertically facing each other at predetermined positions on the conveyor 32, leaving one end open. There is 1 packaged item inside.
Individual packaging bags 36 filled with 0 are obtained.

The conveyor 32 has space portions 38 at regular intervals as shown in the figure, and the space portions 38 support the continuous film 18 and the pair of heated cutting blades 34.
When the film passes through the film, the heated cutting blades 34, 34 perform a so-called box motion in synchronization with this, thereby fusing and cutting the film. The box motion here means that the heating cutting blades 34, 34 are moved in a circular manner relative to each other, with the heating welding (and cutting) surfaces always facing each other, and repeating the bonding position and the separation position. means continuous motion. As a result, a pair of heated cutting blades 3
4 and 34 are moved in the transport direction of the packaging bag 36 with a predetermined time margin while remaining joined to each other, so that sufficient fusion time can be obtained.

FIG. 2 shows another example of a bag-forming-filling section for producing a packaging bag with one end open by fusing and cutting the bag after it is filled with the object to be packaged 10 in this manner.
This is a film packaging material 18 that has been folded in half lengthwise in advance.
is expanded by the expansion member 40, and the packaged object 10 is filled during this time, and the heated cutting blades 34, 34 are
A packaging bag 36 with one end open is obtained by fusion cutting. Further, as shown in FIG. 3, the film 18 is folded in half in the longitudinal direction by the former 24 so as to open at the top, vertically sealed by the heat-sealing device 42, and after being filled with the article 10 to be packaged, the cutting blade 44 The packaging bag 36 may be cut with one end open, and this can also be suitably used as a pre-process of the vacuum packaging apparatus according to the present invention.

(Regarding the open-opening section) The open-opening section 14 of the packaging bag is arranged adjacent to the bag-making section 12 in an aligned manner downstream of the conveyor 32 in the transport direction. The opening section 14 of the packaging bag sufficiently opens the opening of the packaging bag 36, which has at least one end open (in the embodiment, only one end is open), so that a vacuum suction nozzle can be inserted in a subsequent process. Provided for ease of use. A suction belt 46 suction-fixes the packaging bag 36 to the surface of the conveyor belt, and an air supply nozzle 48 disposed on the side of the suction belt 46 to sufficiently open the opening of the packaging bag 36 by supplying air.
It basically consists of. That is, the suction belt 46 is an endless belt conveyor wound around rollers 50, 50 arranged horizontally and in parallel with a predetermined distance apart. A vacuum box 54 connected to a vacuum source (not shown) is interposed between the upper and lower belts, and the upper opening of the vacuum box 54 faces close to the back side of the upper conveyor belt surface. Therefore, if the vacuum box 54 is connected to a vacuum source, the suction belt 46
A negative pressure zone is formed on the surface of the upper conveyance belt, and the packaging bag 36 placed in this negative pressure zone is conveyed while being reliably suctioned and fixed to the suction belt 46.

The air supply nozzle 48 is connected to a compressor (not shown), and the tip of the nozzle is positioned so as to be directed close to the opening of the packaging bag 36 conveyed by the suction belt 46. The air supply nozzle 48 is energized at the timing when the packaging bag 36 arrives and passes in front of the nozzle tip, and the opening of the packaging bag 36 is energized by the air blown out from the nozzle 48. fully opened. Note that in the case of a packaging bag with both ends open, the air supply nozzles 48 are of course arranged oppositely so as to correspond to each opening.

(Regarding the Vacuum Packaging Section) A vacuum packaging section 16 is arranged in line with the open section 14 of the packaging bag. This vacuum packaging section 16 stably holds and transports a packaging bag with at least one end open at predetermined intervals so as not to shift, and automatically inserts a vacuum suction nozzle into the opening of the packaging bag at a predetermined timing. It is provided to perform deaeration, then to automatically pull out the opening from the opening at a predetermined timing, and to suitably seal and weld the opening while keeping it in close contact with each other.

That is, a conveyor belt 56 is disposed horizontally in front of the suction belt 46 provided in the open section 14 in the conveyance direction and in alignment with and adjacent to the suction belt 46 . This conveyor belt 56 runs in synchronization with the conveyance speed of the suction belt 46, and conveys the packaging bags 36 with their openings sufficiently open in the direction of the arrow at predetermined intervals. In this case, the first
As shown in the figure, the periphery of the opening of the packaging bag 36 is positioned so as to slightly protrude from the longitudinal side surface of the conveyor belt 56. This is so that after inserting a vacuum suction nozzle into the opening, the area around the opening can be clamped with an elastic belt and then sealed and fused).

Above the conveyor belt 56, a presser belt 58 is disposed parallel to the conveyor belt 56 and can freely circulate in a vertically adjustable interval. This presser belt 58 is disposed correspondingly to the conveyor belt 56 over a straight line distance from the inlet end to a position where a second sealing and fusing device 60, which will be described later, is disposed. It runs in the same direction in synchronization with the transport speed of 56. and conveyor belt 5
6 and the presser belt 58, the packaging bag 36 is held under clamping pressure. In this case, the presser belt 58 is made of a block-like material such as urethane or sponge that is flexible and highly elastic so that it conforms well to the formation of the objects 10 filled in the packaging bag 36 and has a reliable grip. It is preferable to fix a large number of elastic segments 62 adjacently to the belt with an adhesive (see FIG. 4). Further, when the packaging bag 36 is transported wet with water, as shown in FIG. 5, the outer surface of the elastic segment 62 is covered with a cover 64 made of synthetic rubber, vinyl, etc. to improve water resistance. is desirable.

Furthermore, as shown in FIG. 6a, peaks and troughs are continuously and alternately formed on one longitudinal side of a flexible elastic member 63 such as urethane or sponge, and the other side is attached to the presser belt 58. It may be attached by adhesive or other suitable means. In this case, it is more suitable from the viewpoint of water resistance if the outer surface of the elastic member 63 is covered with a waterproof cover 65 as in FIG. 5 (see FIG. 6b).

(Regarding the mechanism of the vacuum suction nozzle) Next, the conveyor belt 56 and the presser belt 5
The packaging bags 36 are automatically inserted one after another into the openings of the packaging bags 36, which are conveyed under pressure to the packaging bag 8, and run for a predetermined distance in the inserted state, during which time the packaging bags are degassed, and then automatically taken out. The vacuum suction nozzle 66 will be explained. Proximate to both the belts 56, 58,
An endless support (for example, an endless chain 68) is disposed so as to be wound around a plurality of sprockets 70, and is driven by an appropriate drive source to drive both belts 56, 58.
It is designed to circulate in the same direction in synchronization with the transport speed of the robot.

This endless chain 68 is positioned in advance so that at least a portion of its circulation route is a running route extending parallel to the sections where both the belts 56 and 58 are disposed. A large number of vacuum suction nozzles 66 are arranged and fixed horizontally one by one at predetermined intervals. The arrangement interval of each nozzle 66 is set to be the same as the adjacent interval (from center line A to center line A) of the packaging bags 36 that are conveyed while being held under clamping pressure by the conveyor belt 56 and the presser belt 58. . Note that in the embodiment shown in FIG.
Since the installation level of each sprocket 70 is the same and its rotation axis is set vertically, the series of vacuum suction nozzles 66 circulate while maintaining a horizontal level (in contrast, the sprockets 70 It is also possible to arrange the vacuum suction nozzle 66 with its rotation axis horizontally and with different heights.In this case, a separate mechanism is required to move the vacuum suction nozzle 66 forward and backward relative to the opening of the packaging bag. ).

In addition to the above-mentioned endless chain, the endless support 68 may be an endless wire, as long as it can support and circulate a plurality of vacuum suction nozzles 66.
An endless belt or other appropriate member can be used.

The plurality of vacuum suction nozzles 66 preferably have flat nozzle tips, as shown in FIG. 1, and are each communicatively connected to a rotary valve 74 via a flexible intake conduit 72. The rotary valve 74 is connected to a vacuum pump 76. Note that reference numeral 78 indicates a gas cylinder as an option for replacing and filling an inert gas such as nitrogen gas or carbon dioxide gas after the packaging bag is vacuum degassed.

(Regarding Elastic Belts) Furthermore, as shown in the figure, a pair of elastic belts 82 are provided, one above the other, stretched around pulleys 80, 80 so as to be rotatable and movable. That is, a pair of elastic belts 8
The opposing belt surfaces of 2 and 82 are in contact with each other,
and a pulley 80 supporting each elastic belt 82
By rotating in opposite directions, the opposing belt surfaces run in the same direction in synchronization with the running speed of the vacuum suction nozzle 66. As will be described later, these pair of elastic belts 82, 82 closely clamp around the opening of the packaging bag 36 with the vacuum suction nozzle still inserted, and run together with the nozzle 66 for a predetermined distance. It is something.

(Regarding the Sealing Welding Device) A first sealing welding device, indicated by reference numeral 84 in FIG. (and the elastic belts 82, 82
The sealing and fusing device 84 applies a seal around the opening of the packaging bag 36 (which is being pinched and pressed). The first sealed welding device 84 and the second sealed welding device 60 are also configured to perform box motion in the conveyance direction of both belts 56 and 58, and the purpose of providing them in duplicate in this way is This is to ensure the integrity of the seal.
Therefore, when used under normal operating conditions, it is sufficient to provide the first sealing and fusing device 84.
Further, the elastic belt 82 is required to be elastically deformable in order to sandwich the vacuum suction nozzle 66 between both belts. Therefore, it is sufficient that at least one of the pair of belts is made of a highly elastic material.

Functions and Effects of the Invention The functions and effects of the vacuum packaging apparatus according to the present invention configured as described above will be explained. An individual (discontinuous) packaging bag 3 filled with the object to be packaged 10 in the bag making and filling section 12 (for example, any one of FIGS. 1 to 3) and having at least one end opened.
6 is the opening section 14 of the packaging bag in the next process.
will be transferred to. Then, the packaging bag 36 is reliably suctioned and fixed to the conveying belt surface of the suction belt 46, in which a negative pressure zone is formed by applying a vacuum force to the vacuum box 54, and conveyed in the direction of the arrow (see FIG. 7). ).

When the packaging bag 36 suction-supported by the suction belt 46 passes in front of the air supply nozzle 48, compressed air from a compressor (not shown) is delivered to the bag in accordance with the timing of the passage (or by constant operation). Air is supplied from the nozzle 48 toward the opening of the packaging bag, thereby sufficiently opening the opening (see FIG. 7). In this case, since the packaging bag 36 is reliably and stably adsorbed to the belt 46, it will not be blown away by the air supplied from the nozzle 48 or will not be displaced.

The packaging bag 36 with its opening fully opened is transported to the vacuum packaging section 16, and is shown in FIGS. 1 and 7.
As shown in the figure, it is held under pressure by a conveyor belt 56 and a presser belt 58 disposed above and parallel to the conveyor belt. This prevents the packaging bag 36 from being misaligned with respect to the conveyor belt 56 during its conveyance. Like this, both belts 5
6 and 58, a series of nozzles 66, which are synchronously running around as shown in FIG. inserted (Figure 7),
While being transported with the nozzle inserted, the periphery of the opening of the packaging bag 36 is tightly clamped by the pair of elastic belts 82, 82 (see FIG. 7). At the same time, the vacuum suction nozzle 66 inserted into the packaging bag 36 communicates with the vacuum pump 76 under valve action to perform vacuum suction.
The packaging bag 36 is evacuated (FIGS. 7 and 7). In this way, the packaging bag 3 is
Even if vacuum suction is performed in step 6, the packaging bag 36
Since the conveyor belt 56, the presser belt 58, and the pair of elastic belts 82, 82 hold the clamping pressure, an unexpected situation such as being attracted by the negative pressure suction of the nozzle 66 does not occur.

The packaging bag 36 is then passed through the vacuum suction nozzle 66.
is inserted into the opening and is conveyed while being closely pressed around the opening by the pair of elastic belts 82, 82, while the first sealing and fusing device 84 seals the opening. A peripheral seal is applied (see Figure 7). Thereafter, the vacuum suction nozzle 66 is automatically pulled out from the opening of the packaging bag to enter the orbit as shown in FIG. Vacuum packaged products can be obtained.

It should be noted that after the vacuum suction nozzle is extracted, it is possible to complete the process by applying the seal again using the second sealing and fusing device 60 as shown in FIG. 1, but as mentioned above, this is not necessarily a requirement. . In addition, there are other forms of the sealing and fusing devices 60 and 84, such as a roller type and a steel belt type, and the fusing principle is a thermal conduction method such as a bar seal or an impulse seal, a high frequency sealing method, an ultra high frequency sealing method, etc. There are sonic sealing methods, etc., and any of them can be selectively adopted as appropriate based on specific conditions and specifications.

As described above, the vacuum packaging apparatus according to the present invention solves the above-mentioned drawbacks inherent in the conventional vacuum packaging form using nozzle degassing, and makes it possible to vacuum package a large amount of packaging bags smoothly and at high speed. can. In other words, when a packaging bag filled with an object to be packaged is placed on a conveyance line and conveyed sequentially downstream, the packaging bag is placed on a conveyance means such as a conveyor,
It is held stably and does not easily shift.

The opening of the packaging bag is wide open, regardless of the shape or bulk of the packaged item.
The vacuum suction nozzle can be inserted quickly and reliably.

With a vacuum suction nozzle inserted into the opening of the packaging bag, degassing can be performed by performing vacuum suction while the bag is being conveyed by a conveying means. At this time, the nozzle and the packaging bag are stably held and do not shift in position.

During transportation while applying vacuum suction to the packaging bag into which the vacuum suction nozzle is inserted, the opening of the packaging bag is stably held, and furthermore, the opening of the packaging bag is welded and sealed inward from the nozzle tip, A high degree of vacuum attainment is achieved.

Therefore, the problems (a) to (c) mentioned at the beginning of the specification are all solved, and therefore a large number of packaging bags can be vacuum-packed smoothly and at high speed, and work efficiency is significantly improved. Also, since the degree of vacuum attainment is high,
In the case of foods, etc., it becomes possible to preserve them for a longer period of time. Furthermore, compared to indirect deaeration using a vacuum chamber, the capacity of the vacuum pump is required to be smaller, and the manufacturing cost and running cost can be reduced, so that it can fully meet the demand for energy saving.

In the embodiments of the present invention, the vacuum packaging process was explained using a packaging bag with one end open. However, by providing two opposing members such as nozzles, it is possible to create a packaging bag with both ends open. It can also be applied to vacuum packaging.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a schematic configuration of an embodiment of a vacuum packaging apparatus according to the present invention, FIGS. 2 and 3 are schematic explanatory diagrams of different embodiments of a bag making and filling section, and FIG. 5 is an explanatory cross-sectional view of a main part of a presser belt used in the device of the present invention, FIG. 5 is a cross-sectional view of a main part of a modification of the presser belt shown in FIG. 4, and FIGS. FIG. 7 is a sectional view of a main part of a modified example, and is an explanatory diagram sequentially showing the vacuum packaging process of a packaging bag when the vacuum packaging apparatus according to the present invention is operated. 46...Adsorption belt, 48...Air supply nozzle, 5
6... Conveyor belt, 58... Presser belt, 66...
...Vacuum suction nozzle, 68...Endless chain, 82...
...Elastic belt, 84... Sealing fusion device.

Claims (1)

[Claims] 1. A negative pressure zone is formed on the surface of the conveyor belt, and the packaging bag 3
The suction belt 4 transports the packaging bag 36 in a predetermined direction while the bag 6 is suctioned and fixed to the belt surface.
6, and an air supply nozzle 48 disposed on the side of the suction belt 46, which supplies air toward the opening of the packaging bag 36 carried by the suction belt 46 to sufficiently open the opening. a conveyor belt 56 which is arranged adjacent to the suction belt 46 in an aligned manner downstream in a predetermined conveyance direction and conveys the packaging bag 36; a presser belt 58 that runs in synchronization with the belt 56 and conveys the packaging bag 36 in a predetermined direction with the packaging bag 36 sandwiched between it and the conveyor belt 56; The openings of the packaging bags 36, which are arranged in large numbers at predetermined intervals on the endless supports 68 that circulate in synchronization with the belts 56, 58 and are pinched by the conveyor belt 56 and the presser belt 58, are fully opened. A vacuum suction nozzle 66 that is automatically inserted into the opening at a certain timing and automatically extracted from the opening when deaeration and welding and sealing are completed; and a packaging bag into which the vacuum suction nozzle 66 is inserted. A pair of elastic belts 82, 82 run in synchronization with the nozzle 66 by closely pinching the periphery of the opening of the nozzle 36 with opposing belt surfaces; A hermetically sealed weld is placed around the opening of the packaging bag 36, which is tightly clamped by the belts 82, 82.