WO2007129407A1

WO2007129407A1 - Vertical filling-packaging machine

Info

Publication number: WO2007129407A1
Application number: PCT/JP2006/309370
Authority: WO
Inventors: Orihiro Tsuruta; Katsumi Nagai
Original assignee: Orihiro Engineering Co., Ltd.
Priority date: 2006-05-10
Filing date: 2006-05-10
Publication date: 2007-11-15
Also published as: AU2006343121A1; JPWO2007129407A1; EP2039608A1; US20090199519A1; CA2650650A1; CN101437722A; EP2039608A4

Abstract

A vertical filling-packaging machine that in the feeding of fluid contents in tubular films, realizes not only feeding of contents with high quantity fixing accuracy but also suppressing of bubble mixing in the contents. There is provided a packaging machine structured so as to perform the motion of feeding contents through injection nozzle (15) into bottomed tubular film (1'), the motion of carrying the tubular film downward and the motion of causing lateral seal means (60) to carry out hot sealing of the tubular film, thereby attaining hermetic sealing of the contents. Structuring is made so that inferior end (15a) of the injection nozzle is immersed in the contents throughout the sequence of packaging motions, and so that the feeding of the contents is started from the state that an emission orifice of the injection nozzle is immersed in the contents.

Description

Specification

Vertical filling and packaging machine

Technical field

TECHNICAL FIELD [0001] The present invention relates to a vertical filling and packaging machine that manufactures a packaging bag (bag-packed product) by forming a long film drawn out of an original roll force into a cylindrical shape and supplying the contents therein. In particular, the present invention relates to a vertical filling and packaging machine for supplying the above contents into a cylindrical film having a bottomed shape through a charging nozzle.

Background art

Conventionally, a packaging machine that continuously manufactures a packaging bag filled with a content such as a liquid is known (see, for example, JP-A-2005-112359). This packaging machine folds a long sheet-like film drawn from the raw fabric roll into a cylindrical shape, and puts contents into the cylindrical film or forms a predetermined seal portion. To manufacture packaging bags. A typical packaging operation is described below with reference to FIG.

[0003] FIG. 1A shows an initial state of the wrapping operation. At the lower end portion of the tubular film 1 ', the horizontal seal portion F2 formed in the previous step is formed, whereby the tubular film 1' is present. It is bottoming. The pair of squeeze rollers 45 is for squeezing the contents put into the cylindrical film, and the horizontal seal 60 is for sealing the upper opening of the cylindrical film.

From the initial state of FIG. 1A, first, as shown in FIG. 1B, a pair of squeeze rollers 45 are driven to sandwich the tubular film 1. As a result, the contents in the tubular film 1 ′ are divided vertically. In this way, the squeeze roller 45 sandwiches the portion where the contents are present, so that the amount of air mixed into the final packaging bag 91 can be minimized. .

[0005] Next, as shown in FIG. 1C, by rotating the squeeze roller 45, the tubular film 1 is sent downward while forming an empty filling portion 2 in which no content is present. Then, after the empty filling portion 2 is sent to a position where it is sandwiched by the horizontal seal mechanism 60, the horizontal seal mechanism 60 The empty filling part 2 is inserted.

Next, as shown in FIG. 1D, the horizontal seal mechanism 60 is moved downward with the tubular film being sandwiched, thereby forming the horizontal seal portion F2. In this process, the contents from the input nozzle 15 are supplied, and the supplied contents are stored in a region above the squeeze roller 45.

[0007] Next, as shown in FIG. 1E, by completing the heat sealing and cutting by the lateral sealing mechanism 60, one packaging bag 91 filled with the contents is obtained. On the other hand, the pair of squeeze rollers 45 is opened, whereby the contents stored on the squeeze rollers 45 drop downward. Thereafter, the horizontal seal mechanism 60 is moved to the original position to return to the initial state of FIG. 1A.

[0008] As another technique related to the packaging machine of the present invention, when the film of one original roll is finished, the end portion of the film and the starting end of the film from the next original roll are used. A mechanism for joining parts is known (see Japanese Patent Laid-Open No. 9-58616 (1997)). By having such a mechanism, the complicated work of resetting the film every time one sheet roll is used up becomes unnecessary.

Disclosure of the invention

Problems to be solved by the invention

However, in the packaging operation as shown in FIG. 1A to FIG. 1E, when the contents are supplied toward the inside of the cylindrical nozzle film, the amount of the supplied contents varies depending on the following reasons. In some cases, sticking may occur or bubbles may be mixed in the contents.

That is, in the packaging operation of FIG. 1, as shown in FIG. 2, the contents are dropped when the squeeze roller 45 is opened. At the same time when the contents are dropped, the lower end 15a of the charging nozzle It is supposed to be exposed. In the state of Fig. 2A, the force in the charging nozzle 15 is filled with the contents. When the lower end of the nozzle is exposed and opened to the atmosphere as shown in Fig. 2B, it is present in the nozzle. Will also fall inside the cylindrical film.

This means that the inside of the injection nozzle becomes empty. When trying to supply the contents through the emptied nozzle in this way, the contents will flow while gradually moving through the emptied injection nozzle. It becomes difficult to supply was there.

In addition, as shown in FIG. 2B, when the contents are supplied from the state in which the nozzle lower end 15a is exposed, the lower end 15a is above the liquid level, and therefore the contents are charged. Contents There is also a problem that air bubbles are easily mixed into the object. The inclusion of air bubbles means that air remains in the final bag product. If the contents are food, for example, the presence of such air will cause the quality of the contents to deteriorate.

[0013] The present invention has been made in view of the above-described problems, and an object of the present invention is to supply contents with high quantitativeness when supplying contents with fluidity into a cylindrical film. Another object of the present invention is to provide a vertical filling and packaging machine that can prevent bubbles from being mixed into the contents. Means for solving the problem

[0014] In order to achieve the above object, the vertical filling and packaging machine of the present invention includes a charging nozzle for supplying a fluid content into a bottomed cylindrical film, and the content being supplied Transporting means for transporting the tubular film in a downward state, and a horizontal sealing mechanism for sealing the tubular film by heat-sealing a part of the tubular film,

A series of operations including at least an operation of supplying the contents through the charging nozzle, an operation of conveying the tubular film in a state where the contents are supplied downward, and a heat sealing operation by the lateral sealing mechanism. In a vertical filling and packaging machine that manufactures bagging products by packaging operation,

The discharge nozzle outlet is immersed in the contents throughout the series of packaging operations, and the supply of the contents is immersed in the discharge nozzle outlets in the contents. It is characterized by starting from a state.

[0015] In the packaging machine of the present invention, since the supply of the contents is started from the state where the discharge port of the charging nozzle is immersed in the contents, the conventional machine as shown in FIG. Compared to the supply method, bubbles are less likely to be mixed into the contents.

[0016] In addition, the nozzle discharge port is always immersed in the contents during a series of packaging operations (in other words, the discharge nozzle discharge port is not open to the atmosphere). The entrance nozzle is kept empty. Therefore, compared with the conventional supply method as shown in FIG. 2, the quantitativeness of the supplied contents is improved. [0017] The vertical filling and packaging machine sandwiches a portion of the tubular film where the supplied contents are present and rotates in this state, thereby flattening the tubular film. The cylindrical film further includes a pair of squeeze rollers for transporting the cylindrical film downward while forming an empty filling portion, and in the operation of supplying the contents, the cylindrical film above the portion sandwiched between the pair of squeeze rollers The contents may be supplied inside. In this case, the contents stored above the squeeze roller are configured to drop into the cylindrical film below the squeeze roller at the same time as the pair of squeeze rollers is opened. In this case, the liquid level of the content may be higher than the discharge port of the charging nozzle.

[0018] The packaging machine of the present invention includes a storage tank for storing the contents, a supply passage for transferring the contents in the storage tank to the charging nozzle, and the contents from the storage tank. Pump means as a drive source for transferring to the charging nozzle side, a return path for returning the contents from the charging nozzle side to the storage tank, and the contents transferred through the supply flow path A content supply mechanism further comprising valve means capable of switching whether to supply an object into the cylindrical film through the charging nozzle or to return to the storage tank through the return passage. Well! /

[0019] Further, the packaging machine of the present invention holds two original fabric rolls, the end of the first film drawn out from one original fabric roll, and the first drawn out from the other original fabric roll. A film supply device for joining the two film ends to each other and supplying the joined two films as a long film; and side edges of the long film are vertically aligned along the longitudinal direction thereof. A longitudinal sealing mechanism that uses the long film as the cylindrical film, and the vertical sealing mechanism is configured to stop the conveyance of the long film while the first and second films are stopped. The valve means of the content supply mechanism performs the vertical sealing on the joint between the films, and the valve means of the content supply mechanism moves the content to the storage tank side while the vertical seal operation is being performed on the joint. Switch to the return position It may be configured. In this case, the vertical seal for the joint may be performed for a longer time than the normal vertical seal operation so that the content does not leak from the vertical seal formed by the vertical seal. The invention's effect

[0020] As described above, according to the vertical filling and packaging machine of the present invention, since the supply of the content is started from the state in which the discharge port of the charging nozzle is in the content, the quantitative property is improved. A good supply of content is realized, and it is possible to minimize the mixing of bubbles into the content.

Brief Description of Drawings

FIG. 1A is a diagram showing an example of a conventional packaging operation.

FIG. 1B is a diagram showing an example of a conventional packaging operation.

FIG. 1C is a diagram showing an example of a conventional packaging operation.

FIG. 1D is a diagram showing an example of a conventional packaging operation.

FIG. 1E is a diagram showing an example of a conventional packaging operation.

FIG. 2A is a diagram for explaining problems in the conventional packaging operation.

FIG. 2B is a diagram for explaining problems in the conventional packaging operation.

FIG. 3 is a diagram schematically showing an example of a vertical filling and packaging machine of the present invention.

FIG. 4 is a perspective view for explaining a joint portion between films.

FIG. 5 is a diagram showing a configuration of a content supply mechanism that is one of the features of the present invention.

6 is a view showing a pillow type packaging bag that can be manufactured by the packaging machine of FIG. 3. FIG.

FIG. 7A is a process diagram for explaining the packaging operation of the packaging machine of FIG. 3.

FIG. 7B is a process diagram for explaining the packaging operation of the packaging machine in FIG. 3.

FIG. 7C is a process diagram for explaining the packaging operation of the packaging machine of FIG. 3.

7D is a process diagram for explaining the packaging operation of the packaging machine in FIG. 3. FIG.

7E is a process diagram for explaining the packaging operation of the packaging machine in FIG. 3. FIG.

8 is a timing chart showing the operation timing of each structural part of the packaging machine of FIG.

FIG. 9 is a view showing a packaging bag including a joint portion between films.

FIG. 10A is a diagram showing a configuration of a charging nozzle of the packaging machine of FIG.

FIG. 10B is a diagram showing another configuration example of the charging nozzle.

Explanation of symbols

[0022] 1A, IB film 1 '' tubular film

2 Empty filling section

5 Joint

10 Vertical filling and packaging machine

10A film supply mechanism

10C packaging mechanism

14 Folding guide

15 Input nozzle

15a Bottom edge

17 Release port

20 Content supply mechanism

30 Vertical seal mechanism

41 Conveyor roller

45 Shigoki Roller

60 Lateral seal mechanism

61 Heater bar

62 Heater bar holder

71 Bonded sealer

83 sensors

91, 92 Packaging bags

F1 vertical seal

F2 horizontal seal

Ra, Rb Raw roll

BEST MODE FOR CARRYING OUT THE INVENTION

As shown in FIG. 3, the packaging machine 10 of the present embodiment pulls out the film from the raw rolls Ra and Rb, and if necessary, joins the film 1A and the film 1B with the film supply mechanism 10A and the film. Packaging that continuously manufactures packaging bags by forming the film drawn from the supply mechanism 10A into a cylindrical shape and forming the vertical seal and horizontal seal on the film as appropriate. It has mechanism IOC.

[0024] As the film supply mechanism 10A, it is possible to use a conventional general configuration used in this type of packaging machine. In the film supply mechanism 10A shown in FIG. 3, two original rolls Ra and Rb are prepared. For example, when the film 1 A of one original roll Ra is used up, the film of the next original roll Rb is used. 1B is drawn out continuously! FIG. 3 shows a state in which the film 1A is pulled out to the packaging mechanism 10C side as a use side film, and the other film 1B is held near the joining sealer 71 as a standby side film.

[0025] It can be detected, for example, by the sensor 83 that the film 1A on the use side has remained, and the joining sealer 71 is driven based on the detection result. As a result, the end portion of the use side film 1A and the front end portion of the standby side film 1B are heat-sealed, and the two films are bonded to each other. Specifically, as shown in FIG. 4, the two films 1A and IB are partially overlapped to form the seal portion 3, whereby the two films are joined. The region where the two films are overlapped to form the seal portion 3 is referred to as “joint portion 5”.

[0026] Since the film supply mechanism 10A as described above is provided, in the packaging machine 10 of the present embodiment, the film is continuously supplied to the packaging mechanism 10C. Since continuous supply of film is possible, it is very advantageous in that the production of packaging bags is never interrupted.

[0027] Referring again to FIG. 3, the packaging mechanism 10C will be described next. This packaging mechanism 1

The OC is similar to the vertical filling and packaging machine disclosed in Japanese Patent Application Laid-Open No. 2004-276930 previously filed by the applicant.

[0028] The packaging mechanism 10C forms a vertical seal F1 (see FIG. 6) by vertically sealing the folding guide 14 for folding the film into a cylindrical shape and the side edges of the film folded by the folding guide 14 It has a vertical sealing mechanism 30 that is a cylindrical film 1, and a pair of transport rollers 41, a pair of squeeze rollers 45, and a horizontal sealing mechanism 60 that are arranged downstream of the vertical seal mechanism 30 in the film transport direction. And

[0029] The vertical seal mechanism 30 includes a heater bar 31 in which a heating means such as a heater is incorporated. . The heater bar 31 is configured to move back and forth (in the horizontal direction in the figure) with respect to the film and to reciprocate in the up and down direction in the figure.

A box-type operation like 30 can be realized.

[0030] The sealing operation by the vertical sealing mechanism 30 is performed as follows. First, with the heater bar 31 in the raised end position, the heater bar 31 moves in the direction closer to the film, and thereby the film is sandwiched between the heater bar 31 and the main pipe (not shown). The Next, in this sandwiched state, the heater bar 31 moves downward in the drawing as the film is conveyed. Films are heat-sealed by receiving heat from the heater bar 31, and both side edges of the film are joined. After reaching the lower end position, the heater bar 31 leaves the film and returns to its original height.

[0031] By repeating the vertical sealing operation as described above, a continuous vertical sealing portion is formed at the overlapping portion between the side edges of the film. According to the vertical seal mechanism that performs such a box-type operation, there is an advantage that the vertical seal portion can be formed without stopping the conveyance of the film.

[0032] It should be noted that the tubular film 1 'is transported in a state where the cross section is substantially circular until it passes through the vertical seal mechanism 30, in other words, with a space inside. . Further downstream, the tubular film 1 ′ is changed into a flattened state by a guide plate (not shown) disposed between the vertical sealing mechanism 30 and the conveying roller 41. .

The transport roller 41 is arranged so as to sandwich both ends in the width direction of the cylindrical film 1 ′ crushed in this way. The transport roller 41 is one of the film transport means in the packaging mechanism 10C, and transports the tubular film 1 ′ downward by rotating.

[0034] The pair of squeeze rollers 45 sandwiches the cylindrical film so as to divide the filler charged in the cylindrical film, and rotates in this state so that no filler is present in the cylindrical film. The cylindrical film is conveyed downward while forming an empty filling portion. As an advantage of forming such a flat empty filling portion, it is possible to suppress occurrence of seal failure in the following horizontal sealing operation.

[0035] The horizontal seal mechanism 60 includes a heater bar 61 in which a heating means such as a heater is built in, and a heater bar receiver 62 arranged to face the heater bar 61. A horizontal seal F2 (see Fig. 6) is formed on the film by sandwiching the film 1 and heating the film.

[0036] The heater bar 61 and the heater bar receiver 62 are also configured to perform box motion, similar to the vertical seal mechanism 30. That is, as shown by arrow A in FIG.

60

The heater bar receiver 62 moves downward as the film is transported with the tubular film 1 ′ sandwiched therebetween, releases the film force at the lowered end position, and returns to the original position again.

[0037] Although not shown, the heater bar 61 has a built-in cutter that cuts the packaging bag by cutting the tubular film 1 'by cutting the horizontal seal portion F2. Correspondingly, a clearance groove is formed in the heater bar receiver 62 so that the protruding cutter and the heater bar receiver 62 do not interfere with each other.

[0038] Next, a content supply mechanism that has one characteristic part of the packaging machine of the present embodiment will be described with reference to FIG. Note that in FIG. 5, the vertical seal mechanism 30 is not shown. This is not an essential matter.

[0039] As shown in FIG. 5, the content supply mechanism 20 includes a storage tank 22 for storing the content, a supply passage 21a for transferring the stored content to the input nozzle 15, and a drive source for transfer. And a pump 23. Furthermore, in this embodiment, a return passage 21b is provided for returning the contents sent to the input nozzle 15 side to the storage tank 22 side. The contents sent to the input nozzle side are supplied into the tubular film (this mode is referred to as “first mode”) or returned to the storage tank 22 through the return passage 21b (“ The “second mode” can be switched by a three-way valve 25.

[0040] By setting the three-way valve 25 to the "first mode" while the pump 23 is being driven, the contents are supplied into the tubular film 1 'via the injection nozzle 15. On the other hand, by setting the three-way valve 25 to the “second mode” while the pump is still driven, the supply into the tubular film is stopped, and the contents are returned to the storage tank 22 side via the return passage 21b. Will return

[0041] According to such a configuration, it is advantageous in that the supply of contents into the tubular film can be controlled simply by switching the three-way valve 25 while the pump 23 is driven. In general Since a certain amount of time is required until the flow rate of the pump 23 is stabilized, if the intermittent supply is attempted by ONZOFF of the pump 23, the amount of the supplied content may vary. It becomes.

On the other hand, according to the configuration of the present embodiment, it is not necessary to stop the driving of the pump. Since the flow rate of the pump is stable, such a problem hardly occurs. From another point of view, the fact that the pump does not need to be started or stopped means that the burden on the pump is reduced, and therefore pump failure can be minimized. It becomes.

[0043] The type of the packaging bag produced by the vertical filling and packaging machine of the present invention is not particularly limited, but may be, for example, as shown in FIG. The packaging bag 91 is a so-called pillow type packaging in which two horizontal seal portions F2a and F2b (hereinafter simply referred to as “F2” without distinction) and a vertical seal portion F1 which is a backrest are formed. It is a bag. The packaging bag 91 is filled with a fluid content (for example, liquid). The vertical seal portion F1 is a heat seal portion formed by the vertical seal mechanism 30, and the horizontal seal portion F2 is a heat seal portion formed by the horizontal seal mechanism 60.

Next, an example of the packaging operation by the packaging machine 10 of the present embodiment configured as described above will be described with reference to FIGS. FIG. 7 is a process diagram for explaining the packaging operation of the packaging machine 10, and FIG. 8 is a timing chart showing the operation timing of each structural part.

[0045] [Basic packaging operation]

First, the basic operation for manufacturing one package bag 91 will be described.

[0046] FIG. 7A shows an initial state of a series of packaging operations, and at the time “t” in FIG.

A

It shows the state to open. As shown in FIG. 7A, the bottom seal portion of the tubular film 1 ′ is formed with the transverse seal portion F2 formed in the previous step, so that the tubular film 1 has a bottomed shape. Yes. The pair of squeeze rollers 45 and the lateral seal mechanism 60 are both open.

[0047] The contents have already been charged into the tubular film 1 ', and the liquid level is higher (height) than the lower end 15a of the charging nozzle. In other words, under the dosing nozzle The end 15a is immersed in the contents. When the lower end 15a is open to the atmosphere, the content in the nozzle falls into the cylindrical film due to its own weight, and the nozzle is empty. On the other hand, in the configuration of the present embodiment, the lower end 15a of the nozzle is immersed in the contents, so that the inside of the nozzle where the contents do not fall is filled with the contents. The

[0048] Next, as shown in FIG. 7B (at time “t” in FIG. 8), a pair of squeeze rollers 45 are used to form a cylindrical film.

B

Insert the part of contents 1 'that contains the contents. This divides the internal contents vertically. In this way, air is prevented from remaining in the packaging bag 91 by sandwiching the portion where the contents exist with the squeeze roller 45. The supply of contents into the tubular film has already started as shown in Fig. 7A. In the process of Fig. 7B, the liquid level is slightly higher than hi.

[0049] Next, as shown in Fig. 7C (at time "t" in Fig. 8), the supply of contents is continued without stopping.

C

While continuing, each squeeze roller 45 is rotated in the direction indicated by the arrow in the figure. Thereby, the cylindrical film 1 ′ is conveyed downward while forming a flat empty filling portion 2 in which no contents are present. Note that the force not shown in FIG. 7 is also driven in accordance with the rotation of the squeeze roller 45, so that the transport roller 41 (see FIG. 3) is also rotated to support the film transport. Become! /

[0050] After the empty filling portion 2 is sent to a position where it is sandwiched by the horizontal sealing mechanism 60, the horizontal sealing mechanism 60 sandwiches this empty filling portion 2 and the horizontal sealing operation is started.

[0051] Next, as shown in Fig. 7D (at time "t" in Fig. 8), the tubular film is removed by the lateral seal mechanism 60.

D

With the pinched state, the horizontal seal mechanism 60 is moved downward as the squeeze roller 45 rotates. The tubular film 1 ′ is heated while being sandwiched between the transverse seal mechanisms 60, thereby forming a transverse seal portion F 2. Although detailed illustration of the operation is omitted, after the horizontal seal mechanism 60 moves to the lower end position, the cutter built in the heater bar is projected to cut the packaging bag. Also in this process, the supply of the contents is continued, and the supplied contents are stored on the squeeze roller 45. The liquid level height h2 in this process is the highest position in the series of packaging operations, and corresponds to the liquid level height “high” in FIG. [0052] Next, as shown in FIG. 7E (at time “t” in FIG. 8), the film is sandwiched by the lateral seal mechanism 60.

E

Both the holding and the holding of the film by the pair of squeeze rollers 45 are released. As a result, one packaging bag 91 filled with the contents is obtained, and the contents stored on the squeeze roller 45 fall downward in the tubular film 1 ′.

[0053] What is important in the process of FIG. 7E is that the liquid level of the content is higher than the lower end 15a of the nozzle even after the content has dropped in this way (specifically, the same liquid as in the initial state). It is in the point that it is configured to become surface hi). With such a configuration, the lower end 15a of the nozzle is immersed in the contents throughout the series of packaging operations. Therefore, the contents in the nozzle will not drop and the nozzle will not be emptied. In this way, the nozzle is filled with the contents, and the contents are supplied from that state, so that the quantitativeness of the supplied contents becomes very good. In addition, if the contents are thrown from the state where the nozzle lower end is exposed and the inside of the nozzle is empty, bubbles and the like will be mixed in the liquid when the contents fall, but the configuration as described above is used. Therefore, the occurrence of such problems is also prevented.

[0054] As shown in FIG. 7E, the lateral seal mechanism 60 is finally moved to the original position, and the packaging machine returns to the initial state of FIG. 7A. By repeating the series of packaging operations as described above, the packaging bag 91 can be continuously manufactured.

[0055] More specifically, in the above-described packaging operation, the time per cycle shown in Fig. 8 may be, for example, 1.0 second. Based on the operation of squeeze roller 45, the time when squeeze roller 45 is open is 0.4 seconds (corresponding to the process of Fig. 7A and Fig. 7E), and the time when squeeze roller 45 is closed is 0.6 seconds (Fig. 7B). To (corresponding to the process of FIG. 7E).

[Packaging Operation for Film Joint]

By the way, if the contents to be filled are liquid, etc., if any seal part Fl, F2 or joint 5 of the packaging bag 10 has a poor seal, the contents may leak from that part. There is. Therefore, in this type of packaging bag, it is necessary to ensure that each seal is heat sealed!

[0057] This will be described with reference to FIG. As shown in the figure, when the joint part 5 between the films is located on the abdomen of the packaging bag 92, for example, if a seal failure has occurred in the vertical seal part F1 ′ including the joint part 5, the force at that location is also Will leak. In particular, joint 5 is Since it is a part where two films are stacked, the heat sealing in the vertical sealing operation is insufficient, and the sealing strength may be insufficient. Therefore, it is desirable that the longitudinal seal portion F1 'including the joint is particularly sufficiently heat-sealed! /.

[0058] However, since the packaging bag 92 is a defective product in the first place as long as it includes the joint 5, it is considered that it is not necessary to supply the contents to such a packaging bag. However, if the contents are not supplied, the following problems may occur.

That is, as shown in FIG. 9, there is no problem when the packaging bag 91 hangs under the packaging bag 92, but when the lower packaging bag 91 is already carved. The empty packaging bag 92 is hung from the bottom of the tubular film. Since the packaging bag 92 is empty, the tensile force due to the weight of the contents is not applied to the tubular film. Therefore, the empty packaging bag 92 swings and the heater bar 61 (see FIG. 6). There is also a risk of touching. If the packaging bag 92 contacts the heater bar 61, the film may melt and adhere to the heater bar, and as a result, the conveyance of the film will be hindered. In order to prevent such problems, it is preferable that the contents are supplied to the packaging bag 92 in the same manner as other packaging bags.

[0060] The vertical sealing operation for the region including the joint 5 is performed for a longer time than the normal vertical sealing operation. The “normal vertical seal operation” is intended for a vertical seal operation for an area that does not include the joint 5. For example, the normal vertical sealing operation is 1 second, for example, and the vertical sealing operation for the region including the joint 5 (hereinafter referred to as “vertical sealing operation for the film joint”) is 4 seconds, for example. May be.

[0061] The vertical sealing operation for the film bonding portion will be described with reference to the timing chart of Fig. 8 again.

This vertical sealing operation is started when the joining portion 5 between the films is sent to a position where it is sandwiched by the vertical sealing mechanism 30. For example, a sensor (not shown) for detecting the joint 5 may be used to determine whether or not the force has been transported to a position where the joint 5 is sandwiched by the vertical seal mechanism. Alternatively, the normal vertical sealing operation was performed a predetermined number of times by calculating backward from the relationship between the distance between the joining sealer 71 (see FIG. 3) and the vertical sealing mechanism 30 and the length of the film sent per cycle. After that, the vertical sealing operation for the film joint is started. It ’s okay.

[0063] When starting the vertical sealing operation for the film bonding portion, it is shown at time "t" in FIG.

H

Thus, the film transport is stopped, the squeeze roller 45 is opened, and the liquid level is set to “high” (see the state in FIG. 7D). In this vertical sealing operation, the film holding time by the vertical sealing mechanism 30 is set to 2.0 to 3.0 seconds as an example. Since the holding time for normal vertical sealing operation is 0.4 seconds, the holding time for the vertical sealing operation is about 5 times longer than usual.

[0064] The three-way solenoid 25 (see Fig. 4) is switched at time t, so that the storage tank 22

H

The content force that has been sent is returned to the storage tank 22 through the return passage 21b. Here, since the pump 23 continues to be driven, the contents circulate in the supply passage 21a, the three-way valve, the return passage 21b, and the storage tank 22.

[0065] In this way, during the vertical sealing operation for film bonding, the contents are circulated, so that it is possible to prevent the contents from being supplied more than necessary in the cylindrical film. In order to control the supply of the contents, for example, the drive of the pump 23 can be stopped and stopped. However, as described above, when the supply of contents is controlled by ONZOFF of the pump, the amount of contents supplied tends to vary. On the other hand, if the configuration is such that the supply of contents is controlled by switching only the three-way valve 25 while the pump 23 is driven as in this embodiment, the flow rate of the pump 23 is stable. Therefore, the problem of such a decrease in quantitativeness is less likely to occur.

[0066] Another advantage of switching the content supply by the three-way valve 25 is that it prevents the quality of the content from changing. When the film-to-film joint 5 is longitudinally sealed, the packaging operation only needs to be stopped for a few seconds, but for some reason, the operation may have to be stopped for a longer time. If the contents remain in the piping while such operation is stopped, the viscosity of the contents may change due to temperature changes. Changes in viscosity can cause variations in the amount of content supplied. Therefore, it is preferable to circulate the contents while the operation is stopped as in the present embodiment, whereby the temperature of the contents is made uniform and the occurrence of the above problems is suppressed. [0067] After the vertical sealing operation as described above is performed for a predetermined time, the normal packaging operation is resumed as shown in FIG. 8 (see FIG. 8). That is, the squeeze roller 45 is opened, the contents are dropped (see FIG. 7D), the three-way valve 25 is switched, and the supply of the contents into the cylindrical film is resumed. After that, continuous packaging bags can be manufactured by repeating the normal packaging operation described above.

[0068] The power described in the embodiment of the present invention has been described above. The present invention is not limited to the above-described configuration and can be variously modified. For example, the packaging bag is not limited to the pillow type, and may be a three-side seal type or a four-side seal type packaging bag. In the case of the pillow type, the form of the vertical seal portion F1 (see FIG. 6) is not particularly limited, and may be so-called “gap-pasting” or envelope-pasting.

[0069] The vertical sealing mechanism 30 and the horizontal sealing mechanism 60 of the packaging machine shown in FIG. 3 are not limited to forces that have been operated in a box motion type, and heat seals are performed on the spot without moving up and down. A general vertical seal mechanism and a horizontal seal mechanism may be used. The packaging machine 10 in FIG. 3 includes a pair of squeeze rollers 45, but the present invention is not limited to this, and the squeeze rollers can also be configured as a wrapping machine.

[0070] As shown in FIG. 10A, the discharge nozzle 15 may be formed at the lower end 15a of the discharge nozzle, or the discharge port 17 is provided on the outer peripheral surface of the nozzle as shown in FIG. 10B. May be. In the case of the configuration of FIG. 10B, it is only necessary that the liquid level height hi be higher than the discharge port 17 even after the squeeze roller 45 is opened as shown in FIG. 7E. As a result, the discharge port 17 is not exposed to the atmosphere, and the contents in the nozzle remain held in the nozzle without falling into the cylindrical film. As a result, the effects of the present invention can be obtained as described above.

Claims

The scope of the claims

[1] A charging nozzle that supplies a fluid content into a bottomed cylindrical film, a conveying means that conveys the cylindrical film in a state where the content is supplied downward, A horizontal sealing mechanism for sealing the cylindrical film by heat-sealing a part of the cylindrical film;

The discharge nozzle outlet is immersed in the contents throughout the series of packaging operations, and the supply of the contents is immersed in the discharge nozzle outlets in the contents. State force A vertical filling and packaging machine characterized by being started.

[2] A flat empty filling portion is formed in the tubular film by rotating a portion of the tubular film where the supplied contents are present together with pinching. While further having a pair of squeeze rollers that convey the cylindrical film downward,

2. The vertical filling and packaging machine according to claim 1, wherein in the operation of supplying the contents, the contents are supplied into the cylindrical film above a portion sandwiched between the pair of squeeze rollers.

[3] The contents stored above the squeeze roller are configured to drop into the cylindrical film below the squeeze roller at the same time as opening the pair of squeeze rollers.

3. The vertical filling and packaging machine according to claim 2, wherein the liquid level of the content is higher than the discharge port of the charging nozzle even after the content has dropped.

[4] A storage tank for storing the contents, a supply passage for transferring the contents in the storage tank to the charging nozzle, and for transferring the contents from the storage tank to the charging nozzle side. A pump means serving as a driving source of the fuel, a return passage for returning the contents from the charging nozzle side to the storage tank, and before being transferred through the supply passage A content supply mechanism having a valve means capable of switching whether the content is supplied into the cylindrical film through the charging nozzle or returned to the storage tank through the return passage. The vertical filling and packaging machine according to any one of claims 1 to 3.

[5] Hold two rolls, and join the end of the first film drawn from one roll and the end of the second film drawn from the other roll. A film supply device for supplying the two bonded films as a long film;

By further vertically sealing the side edges of the long film along the longitudinal direction thereof, it further has a vertical sealing mechanism that uses the long film as the cylindrical film,

The vertical seal mechanism performs the vertical seal on the joint between the first and second films in a state where the transport of the long film is stopped,

The valve means of the content supply mechanism is switched to a position on the side where the content is returned to the storage tank side while a vertical sealing operation is performed on the joint! 4. The vertical filling and packaging machine according to 4.

[6] The vertical seal for the joint portion is performed for a longer time than a normal vertical seal operation so that the content does not leak from the vertical seal portion formed by the vertical seal. Vertical filling and packaging machine.