JP2001122209A - Vertical filling and packaging machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vertical filling and packaging machine not disturbing the film transfer and not entrapping air when a product is filled even in the case of filling a product of high viscosity. SOLUTION: A vertical filling and packaging machine is provided with an introduction pipe 11 for introducing a product, a bag making and folding-in mechanism 20 for making a sheet-shaped film 1 into the cylindrical shape in the state of encircling the outer periphery of the introduction pipe 11, a top sealing mechanism 40 for heat sealing both side ends of the film 1 passed through the bag making and folding-in mechanism 20 along the longitudinal direction of the film 1, and a side sealing mechanism 60 disposed on the lower end of the introduction pipe 11 and hot sealing the hot sealed film 1 further in the horizontal direction by the top sealing mechanism 40 and cutting a heat sealed section. The vertical filling and packaging machine is so provided with a filling shutter mechanism 50 encircling the outer periphery of the lower end of the introduction pipe 11 from the outside of the film 1 encircling the outer periphery of the introduction pipe 11 when a product is introduced from the introduction pipe 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a packaged product by filling a liquid or paste-like filler into a resinous tubular film and heat-sealing the filled tubular film. The present invention relates to a vertical filling and packaging machine.

[0002]

2. Description of the Related Art Heretofore, as a filling and packaging machine for filling a liquid or paste-like filler (product) into a tubular film while sealing the bag into a tubular shape while making the sheet-like film into a tubular shape, there is a sheet packing machine. Guide for forming a tubular film into a tubular shape, a top seal mechanism to heat seal the edges of the tubularly formed film to form a tubular film, and to put products into the tubular film In addition to heat-sealing the filling pipe formed in the tubular film and the empty filling part formed in the tubular film by the rotation of the stiffener roller by dividing the product put in the tubular film and feeding the tubular film downward, 2. Description of the Related Art A vertical filling and packaging machine having a horizontal sealing mechanism for cutting is known.

On the other hand, as one of the packaging forms, there is a self-standing bag (standing pouch) having a bottom folded portion and capable of standing free. Since self-standing bag-shaped packaged products can be displayed in stores in an upright state, they are widely used in recent years as packaging alternatives to plastic or glass bottles or cans. Therefore, for example, Japanese Patent No. 295963 by the present applicant.
As disclosed in No. 1, a vertical filling and packaging machine capable of performing self-standing bag making and product filling in a series of steps has been proposed.

[0004] In addition to the configuration of the vertical filling and packaging machine described above, a vertical filling and packaging machine for making a self-standing bag and filling a product is arranged on the opposite side of the top seal mechanism with a tubular film interposed therebetween.
A folding mechanism for folding a part of the tubular film inward,
A bottom seal mechanism for thermally sealing the tips of the two peaks formed on the tubular film by the folding mechanism along the longitudinal direction of the tubular film.

[0005] In the vertical filling and packaging machine thus constructed, a portion corresponding to the upper end of the self-standing bag is heat-sealed by the top sealing mechanism while the film is being fed downward.
On the other hand, a part of the tubular film is folded inward by the folding mechanism, and a portion corresponding to the bottom of the self-standing bag is heat-sealed by the bottom sealing mechanism. The product is fed from the feeding pipe into the film heat-sealed by the top seal mechanism and the bottom seal mechanism, the product is divided by sandwiching the fed portion with a squeegee roller, and this portion is heated horizontally by the horizontal seal mechanism. By sealing, a portion corresponding to the side of the self-standing bag is heat-sealed. In other words, the self-standing bag is filled and the product is filled with the self-standing bag lying down. Therefore, in a vertical filling and packaging machine for self-standing bags, the width of the bags is larger than the film feed pitch.

[0006]

However, when a highly viscous material such as miso is intermittently packaged in a horizontally long bag such as a laid free-standing bag, the filling material is charged into a cylindrical film from a charging nozzle. However, the cylindrical film whose inner surface is in close contact with the squeeze roller is not pushed open. For this reason, the filler is likely to accumulate around the charging pipe, and the filler is charged between the charging nozzle and the cylindrical film even if the shape of the cylindrical film into which the filler is charged is to be adjusted using a molding plate. It only rises along the nozzle and cannot feed the filling to the lower end of the bag.

[0007] In the vertical filling and packaging machine as described above,
When intermittently packaging a highly viscous material, a large-diameter charging pipe is used to reduce the pipeline resistance due to its viscosity.
Therefore, the amount of deformation between the portion where the input pipe of the cylindrical film is inserted and the portion that is flattened by the squeeze roller becomes large, and the feeding pitch of the film becomes unstable. There is a problem that the space between the film and the cylindrical film becomes large. In particular, when the space between the charging pipe and the cylindrical film becomes large, air may be involved in filling the product and air may be sealed in the packaging bag.

Accordingly, the present invention provides a vertical filling and packaging machine which does not hinder film feeding even when filling highly viscous products and does not involve air when filling the products. Aim.

[0009]

In order to achieve the above object, a vertical filling and packaging machine according to the present invention comprises a vertical filling and packaging machine for feeding a long sheet-like film downward to form a cylindrical bag and filling a product. A filling and packaging machine for producing a charging pipe arranged in a vertical direction for charging a product and a long sheet-like film into a cylindrical shape while surrounding the outer circumference of the charging pipe. A bag mechanism, a vertical sealing mechanism for heat-sealing both side ends of the film surrounding the outer periphery of the charging pipe through the bag making mechanism along the longitudinal direction of the film, and charging the product from at least the charging pipe. At this time, a shutter mechanism surrounding the outer periphery of the lower end of the input pipe from the outside of the film surrounding the outer circumference of the input pipe, and a filter disposed below the input pipe and heat-sealed by the vertical sealing mechanism. With further heat seal the beam in the horizontal direction, and a side sealing mechanism for cutting the heat-sealed portion.

According to the vertical filling and packaging machine configured as described above, when the product is filled into the film from the charging pipe, the outer peripheral surface of the leading end of the charging pipe is entirely covered from outside the film by the shutter mechanism. As it is pressed over the circumference, the film adheres closely to the outer peripheral surface of the tip of the input pipe,
Since the filler is prevented from being accumulated between the side surface of the charging pipe and the inner surface of the film, the film feeding is prevented from being hindered. Furthermore, since the inside of the bag-shaped film is sealed when the product is filled, the filling pressure does not escape to the outside, and the product is filled to the lower end of the bag by pushing open between the films in which the inner surfaces are in close contact with each other. It becomes possible. Further, since the inside of the film is sealed when the product is filled, it is possible to prevent air from being involved in the packaging bag when the air is involved during the filling.

Further, the shutter mechanism has two shutter members which are arranged to face each other and each have a contact surface which comes into contact with a periphery of a lower end of the charging pipe,
The charging pipe has a cross section formed in an elliptical shape, and the long axis direction of the elliptical cross section is arranged along the division surface between the two shutter members, so that the cross sectional area of the pipeline is set. While reducing the pipeline resistance,
It is possible to suppress the amount of deformation between the portion surrounding the input pipe of the tubular film and the portion where the inner surfaces are in close contact and flattened. As a result, it is possible to stabilize the feed pitch of the film and to reduce the space generated between the outer periphery of the charging pipe and the inner surface of the cylindrical film.

Further, at both ends of the lower end of the charging pipe in the longitudinal direction of the oval cross section, there is substantially a space that can be formed between the outer periphery of the lower end of the charging pipe and the inner surface of the cylindrical film. By adopting a configuration in which the space filling portion having the same shape is formed, the adhesion between the outer peripheral surface of the charging pipe and the inner surface of the film is further increased, and air entrapment during filling is further prevented.

The bag making mechanism may form the long sheet-like film into a cylindrical shape while surrounding the outer periphery of the input pipe, and may further include a central portion in the width direction of the film. Folded inward along the direction to form two ridges on the film, and the two ridges formed on the film by the bag making mechanism are heat-sealed along the longitudinal direction of the film, respectively. A configuration in which a bottom seal mechanism is further provided may be adopted.

Thus, the portion corresponding to the top of the bagged product is heat-sealed by the vertical sealing mechanism, the portion corresponding to the bottom of the bagged product is formed by the bag making mechanism, and the bottom of the bagged product is formed by the bottom sealing mechanism. Are heat sealed. Then, after filling the product into the tubular film, the film is horizontally heat-sealed and cut by the side sealing mechanism, so that a portion corresponding to the side portion of the bagged product is heat-sealed and cut, and one self-standing Molded bagged products are manufactured.

[0015]

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a front view of one embodiment of a vertical filling and packaging machine of the present invention.

This vertical filling and packaging machine forms a self-standing bag 100 having a top seal portion 101, a side seal portion 102 and a bottom seal portion 103 as shown in FIG. This is to fill the liquid or pasty product to be charged. First, the overall configuration of the vertical filling and packaging machine will be schematically described.

A sheet-like film 1 supplied from a film supply roller (not shown) via a guide roller 12 is placed above the input pipe 11 so that both ends of the film 1 coincide with each other. A bag making / folding mechanism 20 for folding a portion serving as a bottom surface inward is provided.

Below the bag making and folding mechanism 20, a bottom seal mechanism 30 and a top sealing mechanism (vertical sealing mechanism) for thermally sealing the film 1 folded into a predetermined shape by the bag making and folding mechanism 20 in its longitudinal direction. ) 40 are arranged. The bottom seal mechanism 30 and the top seal mechanism 40
Bottom seal mechanism 30 forms bottom seal portion 103 (see FIG. 15) of self-standing bag 100, while top seal mechanism 40 is formed of self-standing bag. 100 ceiling seals 10
1 (see FIG. 15).

Below the bottom seal mechanism 30, a film 1
There are provided two pairs of feed rollers 13 that rotate while sandwiching both sides of the feed roller 1 and feed the film 1 downward. Feed roller 1
A filling shutter mechanism 50 is provided below the feed pipe 3 for pressing around the lower end of the feed pipe 11 when filling the tubular film 1 with the product from the feed pipe 11, and further below the feed shutter mechanism 50. A pair of squeeze rollers 14 that are arranged opposite to each other and that are rotated in synchronization with the rotation of the feed roller 13 are provided. Sigoki Roller 14
Is to divide the product put into the film 1 by sandwiching the film 1 over the entire width. Further, the squeeze roller 14 feeds the film 1 together with the feed roller 13 by rotating while sandwiching the film 1.

Further, below the squeeze roller 14, a side for heat-sealing the film 1 loaded with the product in a horizontal direction (horizontal direction) to form a side seal portion 102 (see FIG. 15) of the self-standing bag 100. A seal mechanism 60 is provided.

Next, the bag making and folding mechanism 20, the bottom seal mechanism 30, the top seal mechanism 40, the filling shutter mechanism 50, the squeeze roller 14, and the side seal mechanism 60 will be described in detail.

(1) Bag Making and Folding Mechanism FIG. 2 is a perspective view of the bag making and folding mechanism of the vertical filling and packaging machine shown in FIG.

As shown in FIG. 2, below the guide roller 12, a trapezoidal plate 21 whose upper side is longer than the length of the lower side and the width of the film 1 and whose two oblique sides are equal in angle to each other. , Are arranged obliquely to the vertical direction. Near the lower side of the trapezoidal plate 21, a rectangular width defining plate 23 having a width equal to the length of the lower side of the trapezoidal plate 21 is arranged in the vertical direction. ,
2 extending in a direction perpendicular to the width direction of the width defining plate 23;
A book guide arm 22 is provided.

Film 1 via guide roller 12
Is driven by a feed roller 13 (see FIG. 1).
The film 1 is fed downward while being in close contact with the upper surface of the film 1 and the outer surface of the width defining plate 23. As a result, two ridges 1a are formed on the film 1 as shown in FIG. 3, and a region between the ridges 1a serves as a bottom surface of the self-standing bag.

Below the width defining plate 23, one pressing plate 25 and two pressing plates 2 for folding the region between the two ridges 1a formed on the film 1 further inward.
4 are arranged. The pushing plate 25 is an inverted triangular member, and is arranged so as to be inclined so as to push a region between the two ridges 1a of the film 1 shown in FIG. Each holding plate 24 supports two ridges 1a from the inside of the film 1, and the film 1
5, the ridges 1a are restricted so as not to be pushed in when they are pushed in. The ridges 1a are opposed to each other at an interval inside the film 1. As a result, the film 1 that has passed through the pressing plate 25 and each pressing plate 24 is folded into a W-shape on the side opposite to the open end, as shown in FIG. Valleys are formed.

Each pressing plate 24 is inclined so that the interval between the pressing plates 25 becomes gradually smaller in accordance with the inclination of the oblique side of the pressing plate 25. The film 1 passing through the pressing plate 25 and each pressing plate 24 is Both sides are sandwiched between the pressing rollers 26 and fed downward.

As described above, the film 1 passing through the upper surface of the trapezoidal plate 21 is bent at the two oblique sides of the trapezoidal plate 21 and the lower side therebetween, and is sent downward. At this time, 2
Since the two hypotenuses are equiangular with respect to the center line of the trapezoidal plate 21,
The position of the film 1 is self-adjusted so that the load on each oblique side becomes equal, and the film 1 is fed, thereby preventing the film 1 from shifting in the width direction. Further, the bottom seal portion 103
When forming the crest 1b (see FIG. 15), the ridge 1a which is the tip of the crest 1b is formed by the trapezoidal plate 21 and the width regulating plate 23, so that the position of the crest 1b is shifted. There is no. That is, the position of the two peaks 1b and the distance from each peak 1b to the edge in the width direction of the film match.

As described above, the film 1 is stably fed without meandering, and the formation positions of the two crests 1b are also stabilized, so that the top seal mechanism 40 and the bottom seal mechanism 3
0 can stabilize the heat sealing position. In addition, since the film 1 is prevented from being displaced in the width direction, the film 1 does not wrinkle even when the squeezing roller 14 performs a handling operation.
The heat sealing with 0 can be performed well.

Further, the film 1 is
After forming the two ridges 1a, the middle of each ridge 1a is folded inward, so that the feed amount of the film 1 required for folding the sheet-like film 1 into the shape shown in FIG. 4 is reduced. Therefore, the height of the vertical filling and packaging machine can be reduced accordingly.

(2) Bottom Seal Mechanism FIG. 5 is a view showing a bottom seal mechanism of the vertical filling and packaging machine shown in FIG. 1, wherein FIG. 5 (a) is a top view thereof, and FIG. It is a front view. FIG. 6 is a view of the pressing surface of the bottom seal bar of the bottom seal mechanism shown in FIG.

As shown in FIG. 5, the bottom seal mechanism 30
The two cylinders 33 attached to the frame 10a of the vertical filling and packaging machine and fixed to the frame 10a with the rods 33a facing each other, and the support members 32 fixed to the rods 33a of the cylinders 33, respectively. Two bottom seal bars 31 supported with the pressing surfaces facing each other
And a receiving plate 34 which is supported by the frame 10a and has a distal end portion inserted between the bottom seal bars.
The distance between each bottom seal bar 31 and the receiving plate 34 is set such that the bottom seal bar 31 is pressed against the receiving plate 34 by advancing the rod 33 a of the cylinder 33.

The bag making and folding mechanism 20 described above (see FIG. 2).
Is fed in a state where the receiving plate 34 is inserted between the two peaks 1b. Each bottom seal bar 31 has a built-in heating means (not shown) such as an electric heater. While heating each bottom seal bar 31 by these heating means, simultaneously driving each cylinder 33 and moving each bottom seal bar 31 forward, the film 1
A portion sandwiched between the receiving plate 34 and the bottom seal bar 31,
That is, the two peaks 1b are heat-sealed at the same time.

Here, the pressing surface of each bottom seal bar 31 is
As shown in FIG. 6, the hatched region has a raised portion 31 a that is higher than the surroundings, and when the pressing surface of the bottom seal bar 31 is pressed against the film 1, actually, Part 31
a is pressed against the film 1.

Depending on the shape of the projection 31a, the self-standing bag 1
The shape of the bottom seal portion 103 (see FIG. 15) of the “00”, that is, the shape of the rib for enabling the stand to stand as a self-standing bag is determined. In the present embodiment, the bottom seal portion 103
Has a shape in which the boundary between the region to be heat-sealed and the region to be filled with the product forms a concave curve, and the boundary between the region to be heat-sealed by the side sealing mechanism 60 is connected by a curve. The length L in the vertical direction of the projection 31a is:
It is larger than the feed pitch P of the film 1, and at the upper and lower ends of the convex portion 31 a, the bottom seal portion 103 is
The length of the convex portion 31a in the horizontal direction is the largest so as to overlap at both ends of the side seal portion 102 (see FIG. 15) of No. 00.

The convex portion 31a of each bottom seal bar 31 is provided at a position where pressure is not applied to the tip region 1c (see FIG. 4) of the folded portion on the inner surface of the film 1 forming the crest 1b formed on the film 1. Have been. In addition, each bottom seal bar 31
Is formed with a concave portion 31b surrounded by a convex portion 31a, which does not press the film when the film 1 is heat-sealed.

With the above configuration, when the film 1 is heat-sealed by the bottom seal mechanism 30, the film 1 has a region corresponding to the concave portion 31b of the bottom seal bar 31 and a region at the tip of the peak portion 1b (see FIG. 4). Is not heat sealed. Therefore, these areas serve as escapes (air pools) of air bubbles generated when heat sealing is performed, and no air bubbles remain in the heat sealed areas, so that a good and beautiful heat seal can be performed.

(3) Top Seal Mechanism FIG. 7 is a view showing a top seal mechanism of the vertical filling and packaging machine shown in FIG. 1, wherein FIG. 7 (a) is a top view thereof, and FIG. It is a front view. FIG. 8 is a view of the pressing surface of the top seal bar of the top seal mechanism shown in FIG.

As shown in FIG. 7, the top seal mechanism 40
The two cylinders 43 fixed to the frame 10b with the rods 43a facing each other and the supporting members 42 fixed to the rods 43a of the respective cylinders 43 are supported with their pressing surfaces facing each other so as to be pressurizable. And two top seal bars 41 so that the open end of the film 1 folded by the bag making and folding mechanism 20 (see FIG. 2) can pass between the top seal bars 41.

Each ceiling seal bar 41 has a built-in heating means (not shown) such as an electric heater. While heating the top seal bar 41 with these heating means, simultaneously driving each cylinder 43 to advance each top seal bar 41, the open end of the film 1 is heat-sealed along the longitudinal direction of the film 1. The film 1 has a cylindrical shape.

Here, the pressing surface of each ceiling seal bar 41 is
As shown in FIG. 8, the hatched area has a raised portion 41 a that is higher than the surrounding area. When the pressing surface of the top seal bar 41 a is pressed against the film 1, the raised portion is actually Part 4
1 a is pressed against the film 1. The shape of the top seal portion 101 (see FIG. 15) of the self-standing bag 100 is determined by the shape of the convex portion 41a. In the present embodiment, the shape is such that the boundary with the part to be heat-sealed with the side seal mechanism 60 is connected by a curve.

As in the case of the projection 31a of the bottom seal bar 31 of the bottom seal mechanism 30, the length of the projection 41a of the top seal bar 41 in the vertical direction is larger than the feed pitch P of the film 1. At the upper and lower ends of the convex portion 41a, the convex portion 41a has a horizontal length such that the top seal portion 101 overlaps both ends of the side seal portion 102 (see FIG. 15) of the self-standing bag 100. It is the largest.

(4) Filling Shutter Mechanism FIG. 9 is a view showing a filling shutter mechanism of the vertical filling and packaging machine shown in FIG. 1, and FIG. 9A is a bottom view showing a state where the shutter bar is opened. FIG. 2B is a front view of the state where the rod is omitted. FIG. 10 is a bottom view showing a state where the shutter bar is closed.

As shown in FIG. 9, the charging shutter mechanism 5
Reference numeral 0 denotes a frame 51 fixed to both ends of two rods 57 so as to face each other, a cylinder 52 and a slide bearing 53 fixed to each frame 51, and a cylinder 5
2 and support member 54 fixed to slide bearing 53
And two shutter bars 55 supported by the support members 54 so as to be pressurized with each other. A cushion member 56 made of silicon sponge or the like is provided on the pressing surface of each shutter bar 55, and a concave portion 55a surrounding the outer peripheral surface of the leading end of the input pipe 11 when pressed against each other is formed.

As shown in FIG. 11, the input pipe 11 has an elliptical cross-sectional shape. At the lower end of the input pipe 11, the input pipe 11 A fillet 11a is provided as a space filling portion having substantially the same shape as a space that can be generated between the outer periphery of the lower end portion and the inner surface of the film 11. Each fillet 11a has a substantially triangular shape. The input pipe 11 is disposed in the film 1 such that the major axis direction of the oval cross section is oriented in the direction of the width of the tubular film 1 and the major axis direction of the oval cross section is set between the two shutter bars 55. Are arranged along the dividing plane of

When the respective cylinders 52 are simultaneously driven to advance the respective shutter bars 55, the periphery of the leading end of the charging pipe 11 is surrounded by both shutter bars 55 from the outside of the film 1 as shown in FIG. . At this time, the outer peripheral surface of the distal end portion of the charging pipe 11 is pressed by the cushion member 56 provided on the pressing surface of each shutter bar 55 with substantially uniform pressure without any gap. Further, a space that can be generated between the outer periphery of the input pipe 11 and the inner surface of the film 11 is filled with the fillet 11a.

(5) Sigaki Roller FIG. 12 is a view showing an opening / closing mechanism of the stiffener roller of the vertical filling and packaging machine shown in FIG.

As shown in FIG.
Are provided at one end of the arm 14a rotatable around the arm shaft 14b. Each arm 14a
The other end is provided with a gear portion 14c in a state of meshing with each other. According to such a configuration, when one arm 14a is rotated by a driving unit (not shown), the other arm 14a is interlocked by the gear portion 14c.
a also rotates. By rotating each arm 14a in this manner, the opening and closing operation of the squeeze roller 14 is performed.

(6) Side Seal Mechanism FIG. 13 is a front view of the side seal mechanism of the vertical filling and packaging machine shown in FIG.

In FIG. 13, the side seal mechanism 60 is disposed to face the film 1 so as to support the film 1 with the film 1 interposed therebetween, and the direction perpendicular to the feeding direction of the film 1 (the horizontal direction in the drawing). And a pair of film support members 69 that can be moved to the other side. Each film support member 69
Are made of silicone rubber or the like so as not to damage the film 1, and are respectively attached to the tips of the rods 69a.

Further, two cylinders 61 and 66 are arranged with the film 1 therebetween, with the rods facing each other. Each of the cylinders 61 and 66 is fixed to a slider (not shown) which moves in the horizontal direction.

A cutter holding bar 62 holding a cutter 63 so as to be able to move forward and backward is fixed to the rod of one cylinder 61. The cylinder 61 has a heater bar receiver 64 which is a member for receiving a heater bar 67 described later.
Are provided so as to be rotatable around the support shaft 61a in the direction of arrow A in the figure. The heater bar receiver 64 is urged clockwise in the figure by a spring (not shown), but the position of the distal end of the heater bar receiver 64 is turned to a height equal to or higher than a position of a heater bar 67 described later. It is regulated not to move. Silicone rubber is affixed to the distal end surface of the cutter holding bar 62 and the distal end surface of the heater bar receiver 64.

Further, a cam (not shown) is provided on the rod of the cylinder 61, and the heater bar receiver 64 is provided with a cam (not shown).
A cam receiving roller 64a is provided which comes into contact with the upper surface of the cam when the rod of the cylinder 61 is advanced. Thus, when the rod of the cylinder 61 advances and the cam receiving roller 64a rides on the cam, the heater bar receiving 64
Is rotated counterclockwise against the urging force of the spring.

The rod of the other cylinder 66 has a heater bar 6 having a built-in heating means (not shown) such as an electric heater.
7 is fixed. A cooling bar 68, which is a member for receiving the cutter holding bar 62, is provided in the cylinder 66.
It is provided so as to be rotatable about the support shaft 66a in the direction of arrow B in the figure. Although the cooling bar 68 is urged counterclockwise in the figure by a spring (not shown), the position of the tip of the cooling bar 68 does not rotate beyond a height substantially equal to the position of the cutter holding bar 62. Is regulated as follows. At the tip of the cooling bar 68, a groove is formed in which the cutter 63 can enter when the cutter 63 held by the cutter holding bar 62 is advanced.

The rod of the cylinder 66 is provided with a cam (not shown), and the cooling bar 68 is provided with a cam receiving roller 68a which comes into contact with the upper surface of the cam when the rod of the cylinder 66 is advanced. ing. This allows
The rod of the cylinder 66 moves forward to move the cam receiving roller 68a.
When the vehicle rides on the cam 67a, the cooling bar 68 is rotated clockwise against the urging force of the spring.

In the present embodiment, the side seal mechanism 60
Has shown an electric heater provided only on the heater bar 67, but an electric heater may also be provided on the heater bar receiver 64 in order to further ensure the heat sealing.

Next, the filling and packaging operation by the above-described vertical filling and packaging machine will be described with reference to FIGS.

First, as shown in FIG. 14A, with the squeeze roller 14 open, the bag making and folding mechanism 20
The product is supplied from the supply pipe 11 into the film 1 in which a fold is formed and a predetermined portion is heat-sealed by the bottom seal mechanism 30 and the top seal mechanism 40. At this time, the shutter bar 55 is closed, and the film 1 is brought into close contact with the periphery of the leading end of the charging pipe 11.

When a predetermined amount of the product is filled in the film 1, the shutter bar 55 is opened and the squeeze roller 14 is closed to divide the product in the film 1 as shown in FIG.

In this state, when the feed roller 13 and the squeeze roller 14 are further rotated to feed the film 1 downward, as shown in FIG. 14C, an empty filling portion 1d in which no product is present is formed in the film 1. You.

When the empty filling portion 1d has been fed to a position between the side seal mechanisms 60, that is, when the film 1 has been fed by one bag of the feeding pitch P from the previous operation, the feeding of the film 1 is stopped, and the slider (non- By driving each cylinder 6
1 and 66 (see FIG. 13), and the film support members 69 are moved closer to each other. At this time, the heater bar 67 has been advanced, and the heater bar 67 and the heater bar receiver 64 face each other. When the cylinders 61 and 66 approach each other, FIG.
As shown in the figure, the heater bar 67 and the heater bar receiver 6
4 is closed, and the empty filling portion 1d is pressurized. When the heater bar 67 and the heater bar receiver 64 are closed, the heating means incorporated in the heater bar 67 is driven to heat seal the empty filling portion 1d.

Here, as described above, the bottom seal mechanism 3
In the horizontal direction of the bottom seal mechanism 30 and the top seal mechanism 40, the part heat-sealed at 0 and the part heat-sealed at the top seal mechanism 40 are connected to the part heat-sealed at the side seal mechanism 60 in a curved line. Is maximized in a portion that is heat-sealed by the side seal mechanism 60. In other words, the part to be heat-sealed by the side seal mechanism 60 has a large area that is heat-sealed in advance. Thereby, when the film 1 is sandwiched between the heater bar 67 and the heater bar receiver 64 of the side sealing mechanism 60, it is difficult for the film 1 to wrinkle, so that the sealing failure due to the wrinkling of the film 1 is prevented.

When this heat sealing is completed, FIG.
As shown in (2), the cutter holding bar 62 is advanced at the same time as the heater bar 67 is retracted. Thereby, the cooling bar 68 and the heater bar receiver 64 rotate counterclockwise, respectively, and the cooling bar 68 is moved to a position facing the cutter holding bar 62, while the heater bar receiver 64 is retracted downward. As a result, the empty filling portion 1d is pressurized by the cooling bar 68 and the cutter holding bar 62. At this time, the shutter bar 55 is closed again to bring the film 1 into close contact with the periphery of the tip of the charging pipe 11, and the squeeze roller 14 is opened. In this state, the heat-sealed portion is cooled, and the cutter 63 (FIG. 13)
) To cut the heat-sealed portion of the film 1.

When the heat-sealed portion is cut, the cylinders 61 and 66 are retracted and the film support member 69 is retracted, and the obtained package is dropped as shown in FIG. At this time, the cutter holding bar 62
Is retracted, and the heater bar receiver 64 is returned to the original position.

The package obtained as described above is a self-standing bag 1 that can be erected as shown in FIG. 15 with the part heat-sealed by the bottom seal mechanism 30 (see FIG. 1) as the bottom.
00. Further, the self-standing bag 100 can be stably stood because the portion heat-sealed by the bottom sealing device 40 becomes the rib 101. In addition, since the packaging machine performs bag making and filling at the same time, the self-standing bag 100 can be efficiently produced.

According to the vertical filling and packaging machine of the present embodiment configured as described above, when the product is filled into the film 1 from the charging pipe 11, the charging shutter mechanism 50 causes the leading end of the charging pipe 11 to be filled. Is pressed over the entire circumference from the outside of the film 1. As a result, the film 1 comes into close contact with the outer peripheral surface of the distal end portion of the input pipe 11, and the accumulation of the filler between the side surface of the input pipe 11 and the inner surface of the film 1 is prevented. Can be prevented. Furthermore, since the inside of the bag-shaped film 1 is sealed when the product is filled, the filling pressure does not escape to the outside, and the space between the inner surfaces of the film 1 is pushed open to open the product to the lower end of the bag. Can be filled. Furthermore, since the inside of the film 1 is sealed when the product is filled, it is possible to prevent the air from being involved in the packing bag when the filling is performed.

The input pipe 11 is formed in the film 1 such that the cross-sectional shape of the input pipe 11 is an ellipse and the major axis of the ellipse is oriented in the width direction of the cylindrical film 1. While securing the cross-sectional area of the road to reduce the pipe resistance, the portion between the portion of the tubular film 1 where the input pipe 11 is inserted and the portion which is sandwiched between the squeeze rollers 14 and becomes flat. The amount of deformation can be suppressed.
As a result, the feed pitch of the film 1 can be stabilized, and the outer circumference of the input pipe 11 and the cylindrical film 1
The space generated between the inner surface and the inner surface can be reduced.

Further, by providing a fillet 11a at the end of the input pipe 11 to fill a space that can be created between the outer periphery of the input pipe 11 and the inner surface of the film 11, the outer peripheral surface of the input pipe 11 and the film 1 can be connected. Adhesion can be further improved, and air entrapment during filling is further prevented.

[0069]

As described above, in the vertical filling and packaging machine of the present invention, at least at the time of charging a product from the charging pipe, the lower end of the charging pipe is formed from the outside of the film surrounding the outer circumference of the charging pipe. Since the shutter mechanism surrounding the outer periphery is provided, it is possible to prevent the filler from being accumulated between the side surface of the charging pipe and the inner surface of the film, and to prevent the film feeding from being hindered. Furthermore, since the inside of the bag-shaped film is sealed when the product is filled,
Since the filling pressure does not escape to the outside, the product can be filled up to the lower end of the bag, and at the time of filling, it is possible to prevent air from being entrained and being mixed into the packaging bag.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment of a vertical filling and packaging machine of the present invention.

FIG. 2 is a perspective view of a bag making and folding mechanism of the vertical filling and packaging machine shown in FIG.

FIG. 3 is a cross-sectional view of the film passing through a width defining plate of the bag making and folding mechanism.

FIG. 4 is a cross-sectional view of the film passing through a bag making and folding mechanism.

FIG. 5 is a view showing a bottom seal mechanism of the vertical filling and packaging machine shown in FIG. 1;

6 is a view of a pressing surface of a bottom seal bar of the bottom seal mechanism shown in FIG. 5;

FIG. 7 is a view showing a top seal mechanism of the vertical filling and packaging machine shown in FIG. 1;

8 is a view of a pressing surface of a top seal bar of the top seal mechanism shown in FIG. 7;

FIG. 9 is a view showing a filling shutter mechanism of the vertical filling and packaging machine shown in FIG.

FIG. 10 is a bottom view showing a state where a shutter bar of a filling shutter mechanism of the vertical filling and packaging machine shown in FIG. 1 is closed.

FIG. 11 is a view showing a charging pipe of the vertical filling and packaging machine shown in FIG. 1;

FIG. 12 is a view showing an opening / closing mechanism of a squeeze roller of the vertical filling and packaging machine shown in FIG. 1;

FIG. 13 is a front view of a side sealing mechanism of the vertical filling and packaging machine shown in FIG.

FIG. 14 is a diagram illustrating a filling / packaging operation by a side sealing mechanism.

FIG. 15 is a perspective view showing a self-standing bag manufactured by the vertical filling and packaging machine shown in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Film 1a Ridge part 1b Crest part 1c Crest part 10a, 10b, 51 Frame 11 Input pipe 11a Filler 12 Guide roller 13 Feed roller 14 Stiffening roller 14a Arm 14b Arm axis 14c Gear part 20 Bag folding mechanism 21 Trapezoidal plate 22 Guide arm 23 Width regulating plate 24 press plate 25 press plate 26 press roller 30 bottom seal mechanism 31 bottom seal bar 31a, 41a convex portion 31b, 55a concave portion 32, 42, 54 support members 33, 43, 52, 61, 66 cylinders 33a, 43a, 57, 69a Rod 34 Receiving plate 40 Top sealing mechanism 41 Top sealing bar 50 Filling shutter mechanism 53 Slide bearing 55 Shutter bar 56 Cushion member 60 Side sealing mechanism 62 Cutter holding bar 62a, 67a Cam 63 Cutter 64 H Tarver receiving 64a, 68a cam receiving roller 67 heater bar 68 cooling bar 69 film support member 100 self-standing bag 101 top seal portion 102 sealing section 103 bottom seal portion

Claims (4)

[Claims] 1. A vertical filling and packaging machine for forming a cylindrical bag while feeding a long sheet-like film downward and filling a product, wherein the loading device is disposed in a vertical direction for loading the product. A pipe, a bag-making mechanism for forming a long sheet-shaped film into a cylindrical shape while surrounding the outer periphery of the input pipe, and a film passing through the bag-making mechanism and surrounding the outer circumference of the input pipe. A vertical sealing mechanism for heat-sealing both side ends of the film along the longitudinal direction of the film, and at least, at the time of charging a product from the charging pipe, a lower end of the charging pipe from outside the film surrounding the outer periphery of the charging pipe And a shutter mechanism surrounding the outer periphery of the film, and further heat-sealing the film, which is disposed below the charging pipe and heat-sealed by the vertical sealing mechanism, in the horizontal direction, and further heat-sealed. Vertical filling packaging machine and a side sealing mechanism for cutting the minute. 2. The shutter mechanism has two shutter members that are arranged to face each other and each have a contact surface that is in contact with a periphery of a lower end of the charging pipe. The vertical filling and packaging machine according to claim 1, wherein each of the shutter members is formed in an elliptical shape, and the major axis direction of the elliptical cross section is arranged along a division surface between the two shutter members. 3. At both ends in the major axis direction of an oval cross section at the lower end of the charging pipe, substantially the same space as the space that can be created between the outer periphery of the lower end of the charging pipe and the inner surface of the cylindrical film. The vertical filling and packaging machine according to claim 2, wherein a space filling portion having a shape is formed. 4. The bag-making mechanism, in addition to forming a long sheet-like film into a cylindrical shape while surrounding the outer periphery of the input pipe, and centering the width direction of the film in the longitudinal direction of the film. Folded inward along the direction to form two ridges on the film, and the two ridges formed on the film by the bag making mechanism are heat-sealed along the longitudinal direction of the film, respectively. The vertical filling and packaging machine according to any one of claims 1 to 3, further comprising a bottom sealing mechanism.