JPH068906A - Filling device for substance to be packed for heat-sealing apparatus - Google Patents

Abstract

PURPOSE:To increase the speed of packing in a packing method in which a film is folded double and vertical sealing is applied to an overlapping part on both side ends of the folded film by a method wherein an opening on the front end of a nozzle for filling substances to be packed into the vertically sealed film is reduced down while a number of holes are provided to the side of the nozzle. CONSTITUTION:A belt-like film F is folded double and is conveyed with its side F1 for vertical sealing held by rollers 37, and both ends of the folded film F are stuck together by heat sealing with a pair of vertical heat seal rolls 10. Then, the film F formed in a bottomed cylindrical shape by horizontal sealing F2 applied with a pair of horizontal heat seal rolls 11 is filled with substances W to be packed by operation of a nozzle 22. In a filling device as mentioned above, the nozzle 22 is formed with a reduced-down opening 38 provided on its lower end while a plurality of holes 39 provided at equal intervals to the entire circumference on its side. Thereby, substances to be packed that are conveyed by the filling device to the nozzle 22 can be scattered to the inside of the film F through the reduced-down opening 38 and the holes 39, and the film can be filled uniformly with such substances.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for filling an object to be packaged in a heat sealing device used in a film packaging machine or the like.

[0002]

2. Description of the Related Art As a conventional device of this type, as shown in, for example, Japanese Utility Model Laid-Open No. 1-170601, a continuously transferred film is folded back, and the folded back end edges of the film are overlapped and vertically sealed. It is known that the longitudinally sealed film is filled with an object to be packaged and the film is laterally sealed. An example of this is described with reference to FIG. 12, in which FIG. Holding frame 2
A film roll R formed by winding the film F is detachably attached to the holding frame 2, and a film guide portion 3 and a film folding portion 4 are arranged on the upper part of the machine base 1 to provide the machine base 1 A vertical seal portion 5, first and second horizontal seal portions 6 and 7, and a cutter portion 8 are provided from the upper side on the front surface of the film, and the film F is pulled out from one of the film rolls R and is passed through the film guide portion 3. The film F is folded in two in the longitudinal direction by the folding guide 9 which is led out to the film folding portion 4 and has a U-shaped tip provided at the film folding portion 4, and the pair of vertical heat seal rolls of the vertical sealing portion 5 are opposed to each other. At 10, the folded ends of the film F are heat-sealed and sent out.
The film F is formed into a cylindrical shape by the first horizontal seal portion 6
Film F with a pair of horizontal heat seal rolls 11 facing each other
Is laterally heat-sealed, and the bottom is formed by this horizontal seal F2, whereby the film F formed in the shape of a cylinder with a bottom is filled with an object W to be packaged such as food from the lower end opening of the nozzle 12. Then, the film F is further fed and again the horizontal heat-sealing roll 11 of the second horizontal sheet portion 7 is used to package the article W to be packaged.
Is sealed, and then the lateral seal F2 is cut by the cutter unit 8, thereby film packaging is performed, and the film is taken out and conveyed by a conveyor or the like (not shown).

[0003]

In the heat seal device of the above-mentioned prior art, each heat seal roll 10, 11,
By increasing the rotation speed of 11, it is possible to speed up the sealing and packaging work of the film F, but it is necessary to increase the filling speed of the packaged object W into the film F after the longitudinal sealing with the increase of these speeds. There is. When the article W to be packaged is a liquid article, the article W to be packaged is introduced from the lower end opening of the nozzle 12.
When the liquid is filled at a high speed, the liquid surface H vibrates violently as shown in FIG. 13 and air bubbles are entrained in the article W to be packaged.
There is a problem that air is left in the film F because it is sealed by the horizontal seal portion of (1), and the filling amount of the article W to be packaged varies.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a filling device for a package in a heat-sealing device, which is capable of accelerating the packaging work and stably filling the film in the film.

[0005]

According to the present invention, a continuously conveyed film is sent to a film folding section, the film is folded back by a folding guide of the film folding section, and both ends of the folding back of the film are overlapped by a vertical heat seal roll. In a heat-sealing device in which a vertically sealed film is filled with an object to be packaged in the vertically sealed film, and the vertically sealed film is horizontally sealed by a horizontal heat seal roll to continuously wrap the film, the tip opening of the nozzle is narrowed. Alternatively, the nozzle is closed and a large number of holes are provided on the side of the nozzle.

[0006]

With the above structure, the object to be packaged is dispersed through the plurality of holes and uniformly filled in the film.

[0007]

Embodiments of the present invention will be described below with reference to the accompanying drawings. Incidentally, the same parts as those in FIG. 1 to 7 show a first embodiment of the present invention, in which a holding frame 2 is provided on the side of a machine base 1 of a heat seal device, and a film rewinding film F wound on the holding frame 2. The R is detachably attached.
A film slack preventing mechanism 14 is provided on the machine base 1, and the film F passing through the film slack preventing mechanism 14 is provided.
A guide roll 15 for guiding the
An adjusting mechanism for moving the folding guide 9 in the folding section 4.
16 are provided. The adjusting mechanism 16 is provided with a nut body 17 on the upper part of the machine base 1 so as to be capable of advancing and retreating in a rotation stop state in a direction transverse to the transport direction of the film F, and a screw shaft 18 is screwed onto the nut body 17. Then, the motor 19 for rotating the screw shaft 18 in the forward and reverse directions is attached to the upper part of the machine base 1, and the folding guide 9 having the tip formed in a U-shaped surface is attached to the nut body 17 and located on both sides of the folding guide 9. A bar-shaped transfer guide 20 is provided, and a guide rod 21 extending to an upper position of the lateral seal portion 6 is hung on the folding guide 9. This guide rod
Nozzle 22 attached to 21 and extending to the upper position of the horizontal seal portion 6
This nozzle 22 fills the film F with an object W to be packed such as a liquid or a viscous substance by a filling device (not shown). Vertical seal portion 5 sandwiching the guide rod 21 and the nozzle 22.
A pair of vertical heat seal rolls 10 and 10 are arranged, a bearing stand 23 is attached to the front surface of the machine stand 1, and the vertical heat seal rolls 10 and 10 are rotatably supported between the bearing stand 23. At the same time, gears 24, 24 meshing with the vertical heat seal roll 10 on one side and the vertical heat seal roll 10 on the other side are fixed, and a driven gear 25 is integrally provided on one gear 24, and the driven gear 25 is a machine base. A drive gear 27 driven by a drive device 26 provided in the gear 1 is meshed to form a seal member 10A on one side of both longitudinal heat seal rolls 10 and this sheet member
The outer peripheral surface of 10A is knurled, and a heater (not shown) is incorporated inside both vertical heat seal rolls 10. Further, the first horizontal seal portion 6 arranged below the vertical seal portion 5 and the second horizontal seal portion 7 arranged below the first horizontal seal portion 6 respectively have bearings. Both lateral heat seal rolls 11, 11 are rotatably supported between the bases 28, and gears 29 meshing with the one lateral heat seal roll 11 and the other lateral heat seal roll 11 are fixed,
The driven gear 30 is integrally provided on one gear 29.
A drive gear 31 driven by the drive device 26 is meshed with the drive device 30, a seal member 11A is attached to the outer periphery of both lateral heat seal rolls 11 at equal angular intervals, and a heater (not shown) for heating the seal member 11A therein. Internal organs. Also, the first
The gear 33 of the rotary encoder 32 is meshed with the gear 29 of the second one of the horizontal heat seal rolls 11 to detect the rotation of the horizontal heat seal roll 11, and this rotation is used as an electric signal in the control unit (see FIG. (Not shown). Further, in this example, the drive device 26 is configured to rotate and drive the drive gears 27 and 31 by a cam mechanism or the like (not shown) so as to rotate at a periodic circular speed.

Reference numeral 34 is a film pressing mechanism provided between the vertical seal portion 5 and the first horizontal seal portion 6, and this pressing mechanism 34 is a shaft portion 36 which makes a pair obliquely downward from the mount 35.
The shaft portion 36 forming this pair is provided so as to sandwich the vertical seal F1 side of the film F, and the roller 37 is rotatably provided on the tip end side of the shaft portion 36 to form the pair. Laura 3
The film F is transported with the vertical sheet F1 side of the film F being sandwiched between 7 and 37. In addition, in this example, a pair of rollers 37, 37 is provided in each of the upper and lower sides, and a pair of small rollers 37A smaller than the rollers 37 is rotatably provided on the shaft portion 36A below these rollers 37. The film F is transported while the vertical seal F1 portion of the film F is sandwiched between the small rollers 37A, 37A. Then, the pair of vertical heat seal rolls 10 heat-seal the folded-back end portions of the film F and send them out.
The film F, which is formed into a tubular shape by 1, is attached to the lateral seal portion 6
Film F formed in a cylindrical shape with a bottom by heat-sealing in a lateral direction by a pair of horizontal heat-sealing rolls 11 facing each other.
The article W is filled from the nozzle 22 inside, the film F is further fed, and the article W is sealed again by the transverse heat seal roll 12 of the second transverse sheet portion 7, and then the transverse seal portion is cut by a cutter. The film is cut at the section 8 and the film W of the article W is packaged. In this case, the film F, which has been filled with the object to be packaged W and is not yet horizontally sealed, is pressed by the roller 37 of the pressing mechanism 34 on the side of the vertical seal F1 and is sent to the first horizontal seal portion 6 in a substantially flat state, and then the horizontal seal The horizontal heat-sealing roll 11 of the sealing portion 6 ensures stable horizontal sealing.

A lower end of the nozzle 22 is narrowed to form a throttle opening 38 smaller than an inner diameter cross section of the nozzle 22, and a plurality of holes 39 are formed at substantially equal intervals all around the side of the nozzle 22. is doing. Then, the article to be packaged sent to the nozzle by a filling device (not shown) is dispersed from the squeeze opening 38 and the plurality of holes 39 and uniformly filled in the film F.

As described above, in this embodiment, the film F that is continuously transferred is sent to the film folding section 4, and the film F is folded back by the folding guide 9 of the film folding section 4.
The both ends of the folded film F are overlapped and vertically sealed by a vertical heat seal roll 10, and the vertically sealed film F is formed.
In a heat-sealing device in which an object W to be packaged is filled and a vertically sealed film F is horizontally sealed by a horizontal heat-sealing roll 11 to continuously wrap the film, a front end opening of a nozzle 22 is narrowed to form a throttle opening 38. At the same time, since a large number of holes 39 are provided on the side of the nozzle 22, the articles W to be packed sent by the filling device are dispersed from the squeeze opening 38 and the plurality of holes 39 and filled in the film F. Unlike the conventional one in which the articles to be packaged are concentrated and flow out from the opening of the tip of the nozzle, it is possible to uniformly fill the liquid level of the articles to be packaged W without waviness. As a result, it is possible to perform stable filling with a constant filling amount without leaving bubbles in the film F, and it is possible to solve the problem of high-speed filling from the nozzle 22. Further, since the outflow pressure of the article W to be packaged is dispersed in the plurality of holes 39, the outflow pressure is prevented from being locally applied to the film F, and there is no fear of damaging the film F, particularly the seal portion F1. Furthermore, as an effect of the embodiment, by forming the flat tip by crushing the lower end of the nozzle 22 from both sides thereof, the tip of the nozzle 22 can be arranged close to the lateral seal portion 6. A nozzle tip structure that does not interfere with the lateral seal can be obtained.

FIG. 8 shows a second embodiment of the present invention. The same parts as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted. A nozzle 22A having a diameter smaller than that of the nozzle shown, for example, about 1/2, is used, and the nozzle 22A forms a closed portion 40 by crushing the lower end opening from both sides and forms a side portion of the nozzle 22A. A plurality of vertically elongated holes 39A are formed on the entire circumference.

As described above, in this embodiment, the film F that is continuously transferred is sent to the film folding section 4, the film F is folded back by the folding guide 9 of the film folding section 4, and the folded both edges of the film F are overlapped. A heat seal for longitudinally sealing with a vertical heat seal roll 10, a vertically sealed film F is filled with an object W to be packaged, and the longitudinally sealed film F is horizontally sealed with a horizontal heat seal roll 11 for continuous packaging. In the apparatus, the closed portion 40 is formed at the tip of the nozzle 22A, and a large number of elongated holes 39A are provided on the side of the nozzle 22A. Therefore, the object W to be packaged sent to the nozzle 22A has a plurality of long lengths. It is dispersed from the holes 39A and uniformly filled in the film F, which enables uniform filling without the liquid surface of the object W to be undulated.
Have an effect. Further, as an effect of this embodiment, even if the nozzle 22A has a relatively small diameter as in the present embodiment, by providing the elongated hole 39A, the outflow area of the article W to be packaged becomes large, which is suitable for high-speed mass filling. A nozzle structure is obtained.

FIG. 9 shows a third embodiment of the present invention, in which the same parts as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted. In this example, the nozzle 22B is A female screw portion 41 is formed on the upper end, and this female screw portion 41 is supplied to the supply pipe.
The nozzle 22B is detachably provided by being screwed into the male screw portion 41A of 42, and a narrowing opening 38 is formed by narrowing the lower end of the nozzle 22B, and a plurality of holes 39 are formed around the entire side of the nozzle 22B. There is. In this way, the front end opening of the nozzle 22B is narrowed to form the diaphragm opening 38, and a large number of holes are formed on the side of the nozzle 22B.
By providing 39, the object W to be packaged is dispersed from the plurality of holes 39 and filled in the film F, and uniform filling can be performed without the liquid surface of the object W to be rippled, as in the first embodiment. Has various functions and effects. Also, as an effect of the embodiment,
By providing the nozzle 22B detachably by screwing, it is possible to replace and use a nozzle suitable for the type of the article W to be packaged, the filling speed of the article W to be packaged, and the like. 22B can be washed.

FIG. 10 shows a fourth embodiment of the present invention, in which the same parts as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted. A female screw portion 41 is formed at the upper end, and the female screw portion 41 is detachably provided by being screwed into the male screw portion 41A of the supply pipe 42. The nozzle 22C is closed by crushing the lower end opening from both sides. In addition to forming the blocking portion 40, a plurality of angular holes 39B are formed on the entire circumference of the side surface of the nozzle 22C, and the angular holes 39B are formed so as to become smaller from the upper side to the lower side of the nozzle 22C. . In this way, the closed portion at the tip of the nozzle 22C
Since 40 is formed and a large number of angular holes 39B are provided on the side of the nozzle 22C, the article W to be packaged has a plurality of holes.
39B is dispersed from 39B and filled in the film F to be packaged W
It is possible to uniformly fill the liquid surface without waviness, and to obtain the same operation and effect as the first embodiment.

FIG. 11 shows a fifth embodiment of the present invention, in which the same parts as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted. The film F is formed by gradually changing the angle from the upper side to the lower side of the nozzle 22 from the oblique downward direction to the oblique upward direction. By setting the angle of the hole 39 in this way, the film F below the filling nozzle 22 is filled. Therefore, the liquid pressure of the article W to be packaged is less likely to be applied, and uniform filling is possible.

The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the present invention. For example, the size, shape, number and arrangement of holes are appropriately selected. It is possible, and if the nozzle shape is such that the diameter is reduced in advance toward the tip, it is not necessary to narrow the tip of the nozzle. In this case, the tip opening of the nozzle constitutes the diaphragm opening. It

[0017]

EFFECTS OF THE INVENTION The present invention sends a continuously transferred film to a film folding section, folds the film by a folding guide of the film folding section, vertically folds both end edges of the film and vertically seals with a vertical heat seal roll, In the heat-sealing device in which the object to be packed is filled in the vertically-sealed film and the vertically-sealed film is horizontally sealed by the horizontal heat-sealing roll to continuously wrap, the tip opening of the nozzle is squeezed or closed. A device for filling an object to be packaged in a heat-sealing device, which has a large number of holes on the side of the nozzle, can speed up the packaging work, and can stably fill the object to be packaged into the film. Can be provided.

[Brief description of drawings]

FIG. 1 is an enlarged perspective view of essential parts showing a first embodiment of the present invention.

FIG. 2 is an enlarged sectional view of the nozzle showing the first embodiment of the present invention.

FIG. 3 is a front view of the main part showing the first embodiment of the present invention.

FIG. 4 is a plan sectional view of a main part showing a first embodiment of the present invention.

FIG. 5 is a front view of the heat seal device showing the first embodiment of the present invention.

FIG. 6 is a perspective view of a main part showing a first embodiment of the present invention.

FIG. 7 is a schematic explanatory diagram of a main part showing the first embodiment of the present invention.

FIG. 8 is a sectional view of a nozzle showing a second embodiment of the present invention.

FIG. 9 is a perspective view of a nozzle showing a third embodiment of the present invention.

FIG. 10 is a perspective view of a nozzle showing a fourth embodiment of the present invention.

FIG. 11 is an explanatory cross-sectional view of the nozzle according to the fifth embodiment of the present invention.

FIG. 12 is a front view of a conventional heat seal device.

FIG. 13 is an explanatory view of a packed state of a packaged article showing a conventional example.

[Explanation of symbols]

 4 Folding part 9 Folding guide 10 Vertical heat seal roll 11 Horizontal heat seal roll F Film F1 Horizontal seal F2 Vertical seal 22, 22A, 22B, 22C Nozzle 39 hole 39A Long hole (hole) 39B Square hole (hole)

Claims (1)

[Claims] 1. A film which is continuously transferred is sent to a film folding section, the film is folded back by a folding guide of the film folding section, both ends of the folding back of the film are overlapped and vertically sealed by a vertical heat seal roll, and this vertical sealing is performed. In a heat-sealing device in which a packaged object is filled in a film formed through a nozzle and a vertically-sealed film is horizontally sealed by a horizontal heat-sealing roll for continuous packaging, the tip opening of the nozzle is narrowed or closed. At the same time, a large number of holes are provided on the side of the nozzle to fill the packaged object in the heat seal device.