JPH0699914A - Filling-packaging machine - Google Patents

Abstract

PURPOSE:To keep a good sealing condition for a longitudinal sealing part when a film is continuously fed from a roll of the film and formed into a tubular shape, by providing a detecting circuit which is activated to stop the feeding of the film when a detecting element electrically connects to a conductive element. CONSTITUTION:A film edge slippage detector 36 is provided with a pair of conductive detecting elements 40 which face each other and include plate springs 40A which gently press a doubled film from outside the faces along both edges, and a conductive element 38 which is arranged between the plate springs 40A and inside the edges of the doubled film. When a slippage occurs between the edges of the doubled film and one of the edges slips out of place between the plate spring 40A and the conductive element 38, the plate spring 40A comes in contact with the conductive element 38, that causes the detecting circuit to be activated to halt the feeding of the film of a filling-packaging machine at once. Thereby, a slippage between the edges of the doubled film is prevented and the good sealing condition of the longitudinal sealing part to be sealed by a longitudinal heat-seal roll in the following step can be maintained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filling and packaging machine for making a film wound into a roll and filling the contents of liquid, powder or viscous substance in the pouch. .

[0002]

2. Description of the Related Art As a conventional filling and packaging machine for automatically filling and packaging contents such as liquid, powder or viscous substance,
For example, JP-A-2-46265 and JP-A-2-3292
As disclosed in Japanese Patent Publication No. 29, etc., the film that is continuously transferred is folded back, and the folded back edges are overlapped to vertically seal, and the vertically sealed film is filled with the contents, and the film is horizontally traversed. Sealing is known. An example of this is described with reference to FIGS. 10 to 12. In FIG. 10, reference numeral 1 is a machine base, and a holding frame 2 is provided on a side portion of the machine frame. A film roll R formed by winding the film F in a roll shape is provided so as to be detachable and replaceable, and a film guide section 3 and a film folding section 4 are provided on the upper portion of the machine base 1, and a front portion of the machine base 1 is arranged from above. The vertical seal portion 5, the first and second horizontal seal portions 6, 7 and the cutter portion 8 are provided,
The film F is pulled out from one roll-shaped film roll R and led out to the film folding section 4 via the film guiding section 3, and the film F is guided by the folding guide 9 having a U-shaped tip provided at the film folding section 4. Is folded in two along the longitudinal direction, and the pair of vertical heat seal rolls 10 of the vertical seal portion 5 facing each other heat-seal the folded-back end portions of the film F, and the film F is tubularly formed by the vertical seal portion F1. The film F is laterally heat-sealed by a pair of the horizontal heat-sealing rolls 11, 11 facing each other of the first horizontal sealing portion 6, and the horizontal sealing portion F2 forms a bottom portion to be a packaging bag. Film F formed in a cylindrical shape with a bottom
The filling mechanism 12 fills the inside with a content W made of a liquid such as a source, and the film F is further sent to the bag and the bag is opened again by the horizontal heat-sealing rolls 11 and 11 of the first horizontal sealing unit 6. The side is laterally sealed to seal the contents W, and the laterally sealed portion F2 is further sealed by the lateral heat seal rolls 11 and 11 of the second laterally sealed portion 7, and then the intermediate portion of the laterally sealed portion F2 is sealed. It is configured such that it is cut by the cutter unit 8, the film is wrapped by this, and is taken out and conveyed by a conveyor (not shown).

[0003]

In the conventional filling and packaging machine described above, the film F is fed while being sealed by the vertical heat seal roll 10 and the horizontal heat seal rolls 11, 11. Roll 1
By increasing the rotation speed of 0, 11, and 11, it is possible to increase the speed of the sealing and packaging work of the film F, but on the other hand, the meandering of the film F due to the tension fluctuation of the film winding R wound in a roll shape, etc. The film F may be fed by one side due to this, and therefore, the folding position H by the folding guide 9 of the film folding section 4 is pulled out with one side offset, and the two side edges F3 and F4 of the folding side of the film F are not aligned and are vertically heat sealed. When sandwiched between the rolls 10 and heat-sealed, the area of the overlapping portions of the vertically-sealed portions F1 of the folded back edges F3 and F4 of the film F becomes narrow,
There has been a problem that the sealing strength of the vertical sealing portion F1 is lowered, and eventually a sealing failure occurs, and the content W in the film F leaks from the sealing failure portion.

Therefore, in the present invention, in the packaging operation process, when the folded edges of the film folded in half by the film folding portion are displaced more than a predetermined amount, the operation in the packaging process is stopped and the vertical seal is performed. It is an object of the present invention to provide a filling and packaging machine that can maintain a good sealed condition at a location.

[0005]

SUMMARY OF THE INVENTION According to the present invention, a film which is continuously transferred is fed to a film folding section, the film is folded into a tubular shape by a folding guide of the film folding section, and the folded both edges of the folded film are overlapped. Vertically sealed with a vertical heat-sealing roll to form a film into a tubular shape, and laterally sealed with a horizontal heat-sealing roll to form a bottom portion that becomes a packaging bag. Filling packaging in which the side of the film on the bag mouth side is horizontally sealed by a horizontal heat-sealing roll and continuously wrapped while the film is fed, and the middle part of this horizontal sealed portion is cut by the cutter part. In the machine, located between the folding guide of the film folding portion and the vertical heat seal roll, of the folding both end edges of the folded film A conductive detecting member that softly presses from the surface side is provided, and a conductive member is provided on the inner surface side of both folded edges of the film so as to face each detecting member, and between the detecting member and the conductive member. Therefore, at least one of the folded back edges of the film is disengaged so that the detection member and the conductive member are electrically connected to each other, thereby providing a detection circuit for energizing and stopping the feeding of the film.

[0006]

When the folded edge of the film is disengaged from between the conductive detecting member and the conductive member, the detecting member and the conductive member are electrically connected to each other to be energized, and the detection circuit is operated to operate the film. Feeding stops.

[0007]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 10 and 12 will be described by assigning the same reference numerals to the same or equivalent portions.

1 to 9 show an embodiment of the present invention,
Two holding frames 2 and 2 are provided on the side of the machine base 1 of the filling and packaging machine. A film roll R formed by winding the film F in a roll shape is detachably attached to the holding frames 2 and 2. The end of the film roll R loaded in one holding frame 2 is detected, and the start end side of the film roll R loaded in the other holding frame 2 is on standby, for example, bonded. A continuous film connecting mechanism 13 is provided by the above means.

A film slack preventive mechanism 14 is provided on the machine base 1, and a guide roll 15 for guiding the film F passing through the film slack preventive mechanism 14 is provided on the upper part of the film folding section 4, and the fold back is provided. Folding guide 9 for part 4
An adjusting mechanism 16 for moving the is provided.

The adjusting mechanism 16 has a nut body 17 arranged 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. Is attached to the upper part of the machine base 1, and a motor 19 for rotating the screw shaft 18 in the forward and reverse directions is attached to the nut body 17.
Attaching the folding guide 9 formed on the curved surface,
A bar-shaped guide rod 20 extending to a position above the lateral seal portion 6 is hung on the folding guide 9.

A nozzle 21 extending to a position above the horizontal seal portion 6 is provided adjacent to the guide rod 20.
Is filled with the contents W such as liquid, powder or viscous substance in the film F by a filling device (not shown). Further, a pair of vertical heat seal rolls 10 of the vertical seal portion 5 are arranged with the guide rod 20 and the nozzle 21 sandwiched therebetween, and a bearing stand 22 is attached to the front surface of the machine stand 1 and the bearing stand 22 is provided between the bearing stands 22. Both vertical heat seal rolls 10, 10 are rotatably supported, and gears 23, 23 meshing with one vertical heat seal roll 10 and the other vertical heat seal roll 10 are fixed, and one gear 23 is fixed. And a drive gear 25 driven by a drive device (not shown) provided in the machine base 1 meshes with the driven gear 24 integrally with the seal member 10A on one side of both vertical heat seal rolls 10, 10. In addition, the outer peripheral surface of the seal member 10A is knurled, and a heater (not shown) is built in both the vertical heat seal rolls 10.

Further, the first horizontal seal portion 6 disposed below the vertical seal portion 5 and the second horizontal seal portion 7 disposed below the first horizontal seal portion 6 are , Two lateral heat seal rolls 11, 11 are rotatably supported between the bearing bases 26, respectively, and a gear 27 that meshes with one lateral heat seal roll 11 and the other lateral heat seal roll 11 respectively.
, A driven gear 28 is integrally provided on one gear 27, a drive gear 29 driven by a drive device (not shown) is meshed with the driven gear 28, and a seal member 11A is provided on the outer periphery of both lateral heat seal rolls 11. The heaters are mounted at angular intervals, and a heater (not shown) for heating the seal member 11A is built therein.

The first and second lateral heat seal rolls 1
The gears 31 of the rotary encoder 30 mesh with the respective gears 27 of 1 and 11 to detect the rotation of each lateral heat seal roll 11, and the rotation is used as an electric signal to drive each by a control unit (not shown). The gears 25 and 29 are rotationally driven to rotate at a periodic peripheral speed.

The cutter portion 8 disposed below the horizontal seal portion 7 is provided with a rotary blade 8A on a rotary shaft 32 which is rotated by a driving device such as a servo motor (not shown). Correspondingly, a fixed blade 8B is provided on a support base 33 provided on the machine base 1, and a sachet unloading portion 34 for guiding the sachet FW cut by the operation of the cutter portion 8 is provided below the cutter portion 8. Is provided.

On the side of the machine base 1 and on the side of the film F of the film connection mechanism 13 where the film F is drawn out, for example, the end side of one film roll R and the other film roll R waiting on the other side. A film joint detecting section 35 is provided for detecting a joint portion J of the film F with the start end side or a joint portion J1 of the film F in the film winding R wound in a roll shape.

Further, between the folding guide 9 of the film folding section 4 and the vertical heat seal roll 10, the widthwise displacement of the folding end edges F3, F4 of the film F folded in half by the film folding section 4 is caused. A film edge shift detection unit 36 for detecting the is provided.

In this embodiment, the film edge deviation detecting section 36 is a mounting plate provided on the machine base 1 as shown in FIGS.
A conductive member 38 made of a metal material is attached to 37,
The conductive member 38 is disposed on the inner surface side of the folding end edges F3, F4 of the film F folded in two by the folding guide 9 of the film folding section 4, and on both sides of the conductive member 38. Are folded back edges F3, F of the folded film F through the insulating members 39, 39, respectively.
4 is attached with a conductive detecting member 40 which is softly pressed from the outer surface side, and this detecting member 40 is formed by a leaf spring 40A having flexibility, and the tip end of the leaf spring 40A is folded back at both edges of the film F. It is provided by softly pressing from the outer surface side of F3 and F4 toward the conductive member 38.

Although not shown, the conductive member 38 is electrically connected to the ground side of the filling and packaging machine, each leaf spring 40A is connected by an electric cord 41, and at least one side of the leaf spring 40A is connected. Is connected to a detection circuit 42 serving as a switching means by an electric cord 41, and is electrically connected to the positive side of the power source of the filling and packaging machine (not shown) through the detection circuit 42 to detect the film edge deviation.
Make up 36.

Further, by the film connection mechanism 13, a conductive foil sheet 43 is provided at the joint portion J of the film F between the end side of one film roll R and the start side of the other film roll R waiting. The film F is transferred by the conductive foil sheet 43 provided at the joint portion J of the film F, and the film joint detection section 35 is attached to the film F at the same time.
By contacting the conductive foil sheet 43 at the seam portion J, the ordinary film F portion and the seam portion J are discriminated from each other.

In this case, the film seam detection unit 35
Is provided with a mounting seat 44 made of an insulating material on the side of the machine base 1, and a handle portion 45B obtained by bundling the bases of a large number of conductive fibers 45A on the mounting seat 44. Provided in a pair, the one brush 45 side is electrically connected to the plus side of the power supply side of the filling and packaging machine, the other brush 45 side is electrically connected to the minus side of the filling and packaging machine via the electric cord 46, respectively.
The conductive fiber 45A of the brush 45 is provided so as to come into contact with the film F drawn out and guided from the film roll R wound in the roll shape.

As described above, the pair of brushes 45, 45, which are the movable contact members of the film joint detection unit 35, come into contact with the conductive foil sheet 43 provided at the joint portion J of the film F, so that the respective brushes 45, 45. The conductive foil sheet 43 and the conductive foil sheet 43 form a closed loop and are electrically connected to each other, whereby the joint portion J of the film F is determined.

After the film seam J is detected, the film F is sequentially sent to the vertical heat seal roll 10, the lateral heat seal rolls 11 and 11, and the cutter unit 8 side. Packaging film F
The front and rear positions are not cut by the cutter unit 8 and only the continuously connected packaging bag FE is treated as a defective product in distinction from the normally filled and packed pouch FW, and is switched out by the pouch carry-out unit 34 in the next step. Then, the small bag FW which is a good product and the packaging bag FE which is continuously packaged as the defective product are sorted.

In this case, the pouch F, which is a good cut product, is located in the pouch carry-out section 34 below the cutter section 8.
A shooter 47 that slides down W is installed.
It is conveyed via 47 to a carry-out belt (not shown). Also, regarding the continuous packaging bag FE that has received a signal as a defective product corresponding to the film joint portion J, the shooter
The cylinder 49 connected to the sorting receiving plate 48 provided above 47 tilts and the falling packaging bag FE slides down onto the sorting receiving plate 48, and the sorting receiving plate 48 has the same tilt angle. The pouch carry-out section 34 is configured so as to be carried out along the set slide plate 50 and housed in the defective product housing box 51.

Further, in the seam portion J1 of the film F in the film winding R wound in the roll shape, the conductive foil sheet 43A is attached in the same manner as the seam portion J by the switching of the film F described above. It is determined by the film seam detection unit 35, and the front and rear positions of the packaging film F at the seam location J1 are sent out in a continuous package without being cut by the cutter unit 8, and the package bag FE in the continuous package state is a defective product. And is conveyed into the defective product storage box 51 as the sorting support plate 48 tilts.

Further, after the packaging bags FE treated as defective products are sorted by the sorting receiving plate 48, the sorting receiving plate 48 retracts and returns to the original position with the upper end side as the base point by the operation of the cylinder 49, and is a good product. The small bag FW is carried out to the shooter 47 side.

As described above, in this embodiment, the film F which is continuously transferred is sent to the film folding section 4, and the folding guide 9 of the film folding section 4 folds the film F into two along the longitudinal direction of the film F. The folded film F is folded back, and the folded end edges F3 and F4 of the folded film F are overlapped and vertically sealed in the vertical direction by a vertical heat seal roll 10, and the film F is formed into a tubular shape by the vertical sealing portion F1. The film F is laterally and laterally sealed by the heat-sealing roll 11, and the laterally sealed portion F2 forms a bottom that serves as a bottom for a packaging bag. The contents W are filled, and while the film F is further fed, the bag side of the film F is laterally sealed by the lateral heat seal roll 11 of the first lateral sealing portion 6 to seal the contents W, Horizontal heat seal roll of the transverse seal portion F2 of the sealed film F second transverse seal portion 7
Double sealing by 11 and then the lateral sealing point F2
Is cut by a cutter portion 8 composed of a rotary blade 8A and a fixed blade 8B, and the pouch FW filled with the separated contents W falls on the shooter 47 of the pouch carry-out portion 34 and slides down, which is not shown. It is stored in a storage box that holds good products, or sent on a carry-out belt.

In this embodiment, between the folding guide 9 of the film folding portion 4 and the vertical heat seal roll 10, the folding end edges F3, F4 of the film F folded in half by the film folding portion 4 are arranged in the width direction. A film edge deviation detection unit 36 for detecting deviation is provided. The film edge deviation detection unit 36 is provided with a conductive detection member 40 composed of a leaf spring 40A which is softly pressed from the outer surface sides of the folded back edges F3 and F4. At the same time, a conductive member 38 is disposed on the inner surface side of the folded end edges F3, F4 of the film F so as to face the leaf springs 40A which are the detection members 40. At least one of the folded end edges F3, F4 of the film F is disengaged from between the conductive member 38 and the leaf spring.
40A and the conductive member 38 are electrically connected to each other, and a detection circuit 42 that serves as a switching means is operated.
For example, when the folded back edges F3 and F4 are misaligned and one of the folded edges F3 and F4 is pulled out from between the leaf spring 40A and the conductive member 38, the leaf spring 40A and the conductive member on the pulled out side. When electrically connected to 38, the detection circuit 42 serving as a switching means is actuated, the feeding of the film F of the filling and packaging machine is immediately stopped, and thereby the folded back edges F3 and F4 of the film F are displaced from each other. This prevents the vertical heat seal roll 10 in the next step from keeping the vertical seal portion F1 in a good sealed state.

Then, as in the prior art, the operator visually confirms the state of misalignment of the folded back edges F3 and F4 of the film F folded back in half and the visual inspection of the sealing state of the vertical sealing portion F1 by the vertical heat sealing roll 10. It is not necessary to check and manually adjust the device of the filling and packaging machine each time, and the workability of the seal packaging of the film F can be improved.

The present invention is not limited to the above-mentioned embodiments, and various modifications can be made within the scope of the present invention. For example, in the above-mentioned embodiments, the film folded back by the film folding section 4 is used. Although the conductive detection member 40 which is softly pressed and brought into contact with the outer surface sides of the folded back end edges F3, F4 of F is formed by the leaf spring 40A, the detection member 40 may be formed by a coiled spring material. The detection member 40 may be formed of a brush in which conductive fibers are bundled.

Further, in the above-described embodiment, the detecting members 40, 40 are attached to both sides of the conductive member 38 forming a part of the film edge deviation detecting unit 36 via the insulating member 39, respectively. Conductive member 38 and each detection member on the machine base 1 side of
40, 40 may be attached independently.

[0031]

Industrial Applicability According to the present invention, a film which is continuously transferred is sent to a film folding section, the film is folded into a tubular shape by a folding guide of the film folding section, and the folded back end edges of the folded film are overlapped to perform longitudinal heating. The film is formed into a tubular shape by vertically sealing with a seal roll, and the bottom portion that becomes a packaging bag is formed by horizontally sealing with a horizontal heat seal roll, and the contents are filled into the bottomed tubular film. , In a filling and packaging machine configured to be laterally sealed by a horizontal heat-sealing roll at a portion on the bag mouth side of the film while further feeding the film, and the middle part of the laterally sealed part is cut by a cutter part, It is located between the folding guide of the film folding section and the vertical heat-sealing roll, and the film is folded from the outer surface side of both folding edges. A conductive detecting member that softly presses each is provided, and a conductive member is provided on the inner surface side of the folded both end edges of the film so as to face each of the detecting members, and between the detecting member and the conductive member, At least one of the folded edges of the film is disengaged so that the detection member and the electrically conductive member are electrically connected to each other to provide a detection circuit that energizes to stop the feeding of the film. When the edges are deviated by more than a predetermined amount, the film feeding of the filling and packaging machine is immediately stopped, and it becomes possible to satisfactorily perform the next step of the sealing state of the vertical sealing portion by the vertical heat sealing roll without any trouble.

[Brief description of drawings]

FIG. 1 is a perspective view of a film edge shift detection unit showing an embodiment of the present invention.

FIG. 2 is a bottom view of the film edge shift detection unit showing the embodiment of the present invention.

FIG. 3 is a front view of a filling and packaging machine showing an embodiment of the present invention.

FIG. 4 is a schematic explanatory view of a side surface of a main part of a filling and packaging machine showing an embodiment of the present invention.

FIG. 5 is a front view of a main part of a seal part showing an embodiment of the present invention.

FIG. 6 is a plan view of a main part of a seal part showing an embodiment of the present invention.

FIG. 7 is a perspective view of a joint portion of a film connection mechanism or a joint portion of a film in a film rewinding according to an embodiment of the present invention.

FIG. 8 is a perspective view of a film seam detection unit showing an embodiment of the present invention.

FIG. 9 is a front view of a film seam detection unit showing an embodiment of the present invention.

FIG. 10 is a front view of a filling and packaging machine showing a conventional example.

FIG. 11 is a perspective view showing a state in which a conventional film is folded in two.

FIG. 12 is a perspective view of a main part of a conventional film in a sealed state.

[Explanation of symbols]

 1 Machine stand 2 Holding frame 4 Film folding section 8 Cutter section 9 Folding guide 10 Vertical heat seal roll 11 Horizontal heat seal roll 20 Guide rod 21 Nozzle 34 Pouch carry-out section 36 Film edge deviation detection section 37 Mounting plate 38 Conductive member 39 Insulation Member 40 Detecting member 40A Leaf spring 41 Electric code 42 Detecting circuit F Film R Film rewinding F1 Vertical sealing location F2 Horizontal sealing location F3 Folding both edges F4 Folding both edges W Contents H Folding position

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshio Tada 2-32-34 Higashi Zao, Nagaoka City, Niigata Japan Seiki Co., Ltd. (72) Yasuto Miyazawa 2-32 Higashi Zao, Nagaoka City, Niigata Japan Within Seiki Co., Ltd.

Claims (1)

[Claims] 1. A continuously conveyed film is fed to a film folding section, the film is folded back into a tubular shape by a folding guide of the film folding section, and the folded back end edges of the folded film are overlapped to form a vertical heat seal roll. Along with sealing and forming the film into a tubular shape, a horizontal heat-sealing roll is used to laterally seal to form a bottom that becomes a packaging bag, and the contents are filled into the tubular film with a bottom, and the film is further In a filling and packaging machine in which a portion to be the bag mouth side of the film is horizontally sealed by a horizontal heat seal roll and continuously wrapped, and a middle portion of the horizontal sealed portion is cut by a cutter portion, the film folding portion Located between the folding guide and the vertical heat-sealing roll, and softly pressed from the outer surface side of the folded both end edges of the folded film. A conductive detection member is provided, and a conductive member is provided on the inner surface side of the folded end edges of the film so as to face each detection member, and the film is folded back between the detection member and the conductive member. A filling and packaging machine provided with a detection circuit for stopping feeding of a film by energizing by electrically connecting the detection member and the conductive member by detaching at least one of both end edges.