JPH10101007A - Transversely sealing device of filling and packaging machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a melted part of an inside plastic layer at an end part of a tubular packaging material from being curled toward a part to be cut by arranging one straight part of an inductor to perform the transverse sealing by the dielectric heating on a working surface side of seal jaws. SOLUTION: A copper inductor 27 where two straight parts 27a, 27b which are parallel to each other and of rectangular section are provided and connected at a return part 27c is provided on one of a pair of seal jaws 21, and arranged so that one surface of the straight part 27a is aligned to a working surface 26 of the seal jaw 21. Two seal jaws hold a tubular packaging material web, the inductor 27 is connected to a high frequency power source, and a polyethylene layer is melted. A melted end part 60 is expanded in the direction away from a part 61 to be cut in a round manner, and the melting range 62 is expanded. The melted end part is cooled with cooling water in a cooling water passage 29 and solidified, and webs of the packaging material are sealed in the transverse direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal sealing device in a filling and packaging machine for manufacturing a packaging container having a rectangular cross section or the like filled with a fluid content such as juice, and the horizontal sealing device and the lower sealing device. A filling and packaging machine having a cutting device.

[0002]

2. Description of the Related Art Conventionally, a rewinder supporting a packaging material web having an aluminum foil layer in a roll form, a rewinding device for sequentially rewinding the packaging material web from the rewinder, and a disinfecting device for sterilizing the unwound packaging material web. A tube forming device for forming a tubular shape, a liquid supply tube for filling a tubular material with a flowable content in a web of packaging material, and a content filling tube downward by a length substantially corresponding to one container. Filling and packaging consisting of a container forming device that continuously forms a pillow-shaped container by sealing and cutting in the horizontal direction while feeding, and a container shaping device that bends the end of the pillow-shaped container and shapes it into a rectangular parallelepiped container that is the final form The machine is known (JP-A-58-193).
206, JP-A-61-93010).

[0003] The container forming apparatus in the above-mentioned conventional filling and packaging machine has two pairs of horizontal sealing jaws which move up and down alternately, and the horizontal sealing jaws are used for sealing and cutting the tubular packaging material web in the horizontal direction. As shown in FIG. 1, the pressing mechanism includes a heating mechanism called an inductor 2 for melting the resin of the packaging material web 1 and a cooling medium for rapidly cooling the molten resin. It comprises a cooling mechanism such as a pipe 3 and a cutting mechanism having a cutter blade 4 for accurately cutting the seal portion between the horizontally sealed packaging containers and separating the containers one by one. When a container is formed using such a horizontal sealing jaw, various steps of heating, cooling and cutting can be performed continuously and integrally, and it is extremely difficult to adjust and control the timing between the respective steps of heating, cooling and cutting. It was a simple and excellent molding method.

However, the production capacity per unit time of this type of filling and packaging machine depends on the speed of the pressurizing step in a horizontal sealing jaw provided with a heating, cooling and cutting mechanism.
In the pressing step using the horizontal sealing jaws corresponding to the individual pieces, 0.
It took six seconds. That is, the maximum production capacity per hour conventionally achieved is quotient of 1 hour (3600 seconds) divided by 0.6 seconds / piece, which is 6000 pieces. It was conventionally known as a high-speed filling and packaging machine.

[0005] The breakdown in the pressurization step is roughly 0.28 seconds for heating, 0.15 to 0.17 seconds for cooling,
The time required for cutting is 0.15 to 0.17 seconds (total of 0.6 seconds), and the time required for heating, cooling and cutting are each required at a minimum. For example, if the heating time is shorter than 0.28 seconds, the packaging time is reduced. The resin, which is the laminated material of the material web, does not melt sufficiently and the sealing is incomplete.
If the time is shorter than 0.17 seconds, the molten resin is cut without being solidified, so that the sealing is incomplete and the molten resin adheres to the cutter blade, causing inconvenience in the subsequent cutting process. I understood. Also,
0.15-0.1 minimum for mechanical cutting with a cutter blade
It took seven seconds and could not be reduced any longer.

[0006] From such circumstances, 600 per hour
Production capacity well over 0, ie 8 per hour
It has been considered impossible to develop an ultra-high-speed filling and packaging machine having a production capacity of 000 pieces or more.

In the above-mentioned conventional transverse seal jaw, as shown in FIG. 1, one of the seal jaws has a housing 6 for the cutter blade 4 between rubber seal pressure receivers 5, and the other has a cut-off portion. Receiving portions 7 of the cutter blades are provided between straight portions parallel to each other of the inductor 2 provided flush with the working surface of the seal jaw, and are positioned between the heat sealing portions during heat sealing. In addition, it is impossible to avoid the generation of a residual portion 8 (liquid pool) of a fluid content such as juice in a groove formed by the storage portion 6 and the receiving portion 7 of the cutter blade. The liquid adheres to the cutter, and the cutter is easily rusted by an acidic liquid such as juice, and the rust causes blade spillage, which often results in insufficient cutting. In addition, problems such as contamination of the machine due to the outflow of the liquid from the cut surface, rust of the machine part due to the acidity of the filling liquid, and the like,
As a result, there were problems such as restrictions on the material used for the mechanical part.

[0008] In addition, when cut, the liquid in the liquid pool adheres to the cut portion of the container as it is, mold is generated from the adhered portion, and consumers often make complaints. In addition, when a colored material is filled, if liquid permeates from the cut surface, the product image is extremely poor. Therefore, the cut surface is printed in the same color as the filler to make it inconspicuous.

As described above, in this type of filling and packaging machine, the liquid pool at the cut section is a major problem affecting the quality of the packaged product. Conventionally, in order to prevent this, in a transverse seal jaw in which a cutter and a groove for accommodating the tip of the cutter which are provided to be able to move forward and backward are formed, the cutter cuts the packaging material at the forward position, and the tip of the cutter at the retreat position. Residual product removing device that remains at the position where the packaging material is pressed so that no residue is formed (Japanese Patent Laid-Open No. 7-249).
No. 38) and, in addition to the upper and lower heating mechanisms in the horizontal sealing jaw, a third heating mechanism is provided at the upper and lower edges of the groove for accommodating the tip of the cutter, and the residue generated during sealing is removed by the previous heating unit. A sealing device (JP-A-7-164524) that can be sealed by a third heating unit is known. However, in these apparatuses, the formation of the liquid pool could not be completely prevented because the groove formed by the storage portion and the receiving portion of the cutter still existed.

Further, in the above-mentioned conventional transverse seal jaw, since the receiving portion of the cutter blade at the time of cutting exists as described above, it is necessary to seal both sides of the portion to be cut, and the inductors are parallel to each other. The two extending straight portions are both arranged flush with the working surface of the sealing jaw,
The two straight portions have a structure having a vertical turn at the end of the seal jaw.

[0011] By using the horizontal sealing jaw having such an inductor, the tubular packaging material comprising a laminate mainly composed of heat-sealable paper having an aluminum foil layer is placed on both sides of the section to be cut, that is, the area along the section to be cut. In the case of heat sealing, the induction heating at the end of the pressurized and flattened tubular packaging material becomes insufficient, the width of the melting range of the inner plastic layer becomes narrow at the packaging material end,
It has also been known that poor sealing occurs at the end of the packaging material.

Then, in order to prevent the width of the melting range from being narrowed at the end of the packaging material, a material having high magnetic permeability is locally inserted between the inductors corresponding to the ends of the tubular packaging material. It has also been known that induction heating at the end of a tubular packaging material is sufficient (JP-A-62-52025). However, a material having high magnetic permeability is extremely brittle, so that it is necessary to pay attention to handling, and there is a problem that a locally inserted material having high magnetic permeability increases the manufacturing cost.

[0013]

SUMMARY OF THE INVENTION The present inventors have developed an ultra-high-speed and high-performance device having a production capacity of 8,000 packs per hour, which greatly exceeds the production capacity of 6000 packs per hour, which has heretofore been impossible. With the aim of developing a filling and packaging machine, various improvements were made to the conventional horizontal seal jaws, and trial production and examination were not successful. Therefore, discarding the fixed concept of the conventional horizontal seal mechanism of this type of device, earnestly researching all possibilities, and separating the heating / cooling mechanism and the cutting mechanism in the pressurizing mechanism of the conventional horizontal seal device, The time required for the cutting step in the pressing step can be reduced from 0.15 to 0.17 seconds, and the pressing step including the heating / cooling step is performed in the range of 0.43 to 0.45 seconds (8000 in terms of one hour). It is noted that the heating / cooling mechanism and the cutting mechanism are separated, and the sealing portion of the container to be cut is in a suspended state, that is,
It was in a hanging state, and it seemed impossible to achieve accurate cutting at high speed. Nevertheless, in order to find a solution, we prototyped and examined various types of filling and packaging machines that had a cutting mechanism separate from the heating and cooling mechanisms in the pressurizing mechanism of the horizontal sealing device. The sealing portion of the container was cut accurately at high speed, and the cutting device was able to be cut off one by one. The effect was confirmed, and a high-speed filling and packaging machine was completed (Japanese Patent Application No. Hei 8 (1996)). -244707).

Such a high-speed filling and packaging machine fills a tubular-shaped packaging material web with a fluid content and places the tubular packaging material web filled with the fluid content at an interval corresponding to one container. It has a horizontal sealing device that seals in the horizontal direction, and a cutting device that cuts a seal portion of a container suspended under the horizontal sealing device and separates the containers one by one. In addition, the number of cutting devices in such a filling and packaging machine is one set. Compared to providing a plurality of cutting devices in a conventional filling and packaging machine, the structure is simple, there is no interference between the cutting devices, and the space is minimized. Cutting can be done,
The filling and packaging machine can be miniaturized, and the tapered or sealed part of the pillow-shaped container is used as a guide to improve the positional accuracy when cutting, so that the center of the sealed part of the container can be cut accurately. have.

An object of the present invention is to solve all the problems of the sealing jaws in the above-mentioned conventional horizontal sealing device, which is suitable for such an ultra-high-speed filling and packaging machine having a production capacity of 8000 or more per hour. It is to provide a sealing device.

[0016]

SUMMARY OF THE INVENTION The present inventors have surprisingly arranged that one straight portion of the inductor is located on the working surface side of the sealing jaw, that is, on the working surface and in the vicinity thereof. At the end of the tubular packaging material,
The present inventors have found that the width of the molten portion of the inner plastic layer is increased, and have completed the present invention.

That is, the present invention provides a method for sealing at least one region of a tubular wrapping material comprising a wrapping material web having an aluminum foil layer, the region including a portion to be cut transversely.
What is claimed is: 1. A transverse sealing device comprising a sealing jaw having an inductor having two straight parts, wherein a straight part of an inductor for transverse sealing by induction heating is arranged on the working surface side of the sealing jaw. Related to the device.

Further, according to the present invention, the inductor has two straight portions extending parallel to each other, one of the straight portions is embedded in the seal jaw main body, and the other surface is flush with the working surface of the seal jaw. Or the inductor has one straight part, and one surface of the straight part is flush with the working surface of the sealing jaw, and one straight part of the inductor disposed on the working surface side of the sealing jaw. The present invention relates to a horizontal sealing device in which a cooling water passage having a reinforcing portion is provided.

Further, the present invention relates to a horizontal sealing device in which the sealing jaw is not provided with a cutting mechanism, and a filling and packaging machine having the horizontal sealing device and a cutting device provided thereunder.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the sealing device according to the present invention will be described with reference to the drawings, but the present invention is not limited to those described in these drawings.

The outline of a high-speed filling and packaging machine in which the use of the horizontal sealing device according to the present invention is particularly suitable is as shown in FIG. 2, in which a packaging material web 1 having an aluminum foil layer is supported in a roll form. A rewinder, a rewinding device for sequentially rewinding the packaging material web from the rewinder, a tube forming device for sterilizing the unwound packaging material web and forming it into a tube, and a flowable content in the tubular packaging material web. A liquid supply pipe 9 for filling an article and a sealing jaw for continuously forming a pillow-shaped container 10 by sealing in a lateral direction while feeding the content-filling tube downward by a length substantially corresponding to one container. A cutting device 30 for cutting the sealing portion of the suspended pillow-shaped container provided below the horizontal sealing device and separating the containers one by one; Folding the ends of the isolated pillow-like container 10, and a container shaping apparatus for shaping into a rectangular-shaped container 11 which is the final form.

As shown in FIG. 3, for example, the packaging material web 1 of the present invention comprises an outer polyethylene layer 15, a paper layer 16, an adhesive layer 17, an aluminum foil layer 18, and an inner It has a heat-sealing paper-based laminate structure composed of a polyethylene layer 19.

The horizontal sealing device 20 of the present invention is similar to that of the Japanese Patent Application Laid-Open No.
As long as it has the mechanism and structure described in JP-A-193206 and JP-A-61-93010, as shown in FIG. (Note that only one pair is shown in FIG. 2).

A description will be given of such a horizontal sealing device 20 described in, for example, the above-mentioned JP-A-61-93010. As shown in FIG. 5, as shown in FIG. And an elevating frame 23 which moves up and down together with the vertical rod 22 and is attached to the vertical rod 22, and an elevating frame 23 which swings about a pair of mutually parallel horizontal axes at the lower part.
And a pair of front and rear seal jaws 21 respectively fixed to the upper portions of the respective swing arms 24 so as to face each other, and a closed position where the two seal jaws 21 approach each other. And an arm opening / closing device 25 for swinging the swing arms 24 between the open positions separated from each other, and generating the seal pressure between the seal jaws 21 by attracting the swing arms 24 to each other in the closed position. And a press device.

The two lifting frames 23 are alternately moved in different directions at predetermined strokes in synchronization. That is, when one elevating frame 23 moves up, the other elevating frame 23 moves down. When the lifting frame 23 is at the upper limit position of the lifting stroke,
Are closed with each other, whereby the tube 14 is pressed transversely with a predetermined width and sealed. When the two sealing jaws 21 are lowered together with the lifting frame 23 while pressing the tube 14, the tube 14 is fed by a length corresponding to one container. When the lifting frame 23 reaches the lower limit position, the sealing jaws 21 open to release the tube 14.

As described above, the horizontal sealing jaws 21 are opened and closed and raised and lowered in a certain cycle in opposite directions by, for example, rotation of a plurality of sets of cams provided in the filling and packaging machine. Being driven. That is, 1
The pair of lateral seal jaws 21 are separated from each other when ascending, and ascend so as to straddle another pair of lateral seal jaws 21 descending while holding and pressing the tubular container,
At the time of lowering, the tube-shaped container is held and pressurized to seal in the horizontal direction. Such an operation of the horizontal sealing jaw 21 is repeated, and the connected pillow-shaped container 10 is continuously formed.

Next, the seal jaws in the horizontal sealing device of the present invention will be described. A pair of horizontal sealing jaws 21
As shown in FIGS. 6 and 7, the seal jaw 21 has a working surface 26 for sealing the seal portion of the container, and one of the seal jaws 21 is made of rubber made to be substantially equal to the width of the inductor 27 for receiving the sealing pressure. Is provided, but the cutter blade housing is not provided unlike the conventional seal jaw shown in FIG.

The other seal jaw 21 is substantially entirely formed of an electrically insulating material such as epoxy resin.
As shown in FIG. 7 and FIG. 7, two straight portions 27a and 27b extending in parallel to each other and having a rectangular section are provided.
A copper inductor 27 connected at 7c is provided. The one straight portion 27a is arranged so that one surface thereof is flush with the working surface 26 of the seal jaw 21, and the other straight portion 27b is embedded in an electrically insulating material.

The length of at least the straight portion 27a of the inductor on the working surface side of the seal jaw 21 in the longitudinal direction is larger than the width of the tube to be clamped. A cooling water passage 29 is provided inside the straight portion 27a of the inductor on the working surface side of the seal jaw 21. Further, when the sealing jaw 21 clamps the packaging material web, the cooling water passage 29 is pressed by the sealing pressure. There are several reinforcing portions 29a provided in the cooling water passage 29 so that the cooling water is not crushed.

Cooling water flow pipes 29b are connected to both ends of the straight portion 27a of the inductor on the working surface side of the seal jaw 21 so that cooling water always flows through the cooling water passage 29. On the other hand, a cooling water passage may be provided in the straight portion 27b of the inductor farther from the working surface side of the seal jaw 21 in order to prevent heat generation of the copper inductor itself, but a solid cooling water passage is not provided. It may be formed as.

As another embodiment, although not shown, the inductor has one straight portion, and one surface of the straight portion is disposed so as to be flush with the working surface of the seal jaw. An example is a seal jaw provided with wiring for connecting a high-frequency power supply from both ends of a straight portion of the inductor. In the case of this embodiment, the wiring may be provided inside the seal jaw 21 or may be taken out from one direction, and this wiring may be a flexible wiring, provided outside the seal jaw and connected to the swing arm 24. It may be connected.

The process of transversely sealing the tubular packaging material web is as follows. Two sealing jaws 21
Starts to clamp the tubular packaging material web 14 and reaches the predetermined sealing pressure, the inductor 27 is connected to the high-frequency power supply, thereby substantially corresponding to one surface of the straight portion 27a located on the working surface 26 side. An eddy current is generated in the aluminum foil layer 18 in the region where the eddy current flows, and Joule heat is generated by the eddy current and the electric resistance of the aluminum foil layer 154.

The generated Joule heat is transmitted to the inner polyethylene layer 19 located between the opposing aluminum foil layers 18, and the polyethylene layer is melted. FIG. 8 shows the molten state at this time. At the end portion 60, the end portion 60 is rounded and widened in a direction away from the scheduled cutting portion 61, and the melting range 62 is expanded. Thereafter, the inductor acting as the heating coil is disconnected from the high-frequency power supply, so that no Joule heat is generated.

As described above, during operation of the horizontal sealing device, the cooling water always flows from the cooling water passage 29b through the cooling water passage 29, and the molten polyethylene layer is cooled and solidified by the cooling water. The packaging material webs are sealed laterally. Since the sealing jaw does not have a cutting mechanism, there is no pool of contents in the melted and fixed polyethylene layer. Next, the melted and solidified seal portion is sent to a cutting portion of a cutting device described below,
Cut into individual containers.

In the case of the embodiment as shown in FIG. 6, one straight portion 27a of the inductor 27 is disposed so that one surface thereof is flush with the working surface 26 of the seal jaw 21. The plane formed by the two straight portions 27a and 27b extending parallel to each other of the inductor 27 is disposed so as to be orthogonal to the working surface 26 of the sealing jaw. One straight portion 27a of the inductor 27 in a range where the width of the molten portion of the inner plastic layer in the portion does not become narrower than the width of the molten portion of the central portion of the tubular packaging material.
May be arranged so that one surface thereof is not flush with the working surface 26 of the seal jaw 21, but slightly protrudes or slightly retracts from the working surface side, that is, the working surface,
Similarly, the plane formed by the two parallel straight portions 27a and 27b of the inductor 27 may be arranged so as to have a certain angle with respect to the working surface 26 of the sealing jaw.

Also, the cross-sectional shape of the inductor 27 is not limited to a rectangular cross-section, and the width of the melted portion of the inner plastic layer at the end of the tube-shaped packaging material is limited to the width of the central portion of the tube-shaped packaging material during heat sealing. An appropriate shape such as a round shape or an elliptical shape can be used as long as the width does not become smaller than the width of the portion. Further, as described above, in the case of the inductor having one straight portion and one surface of the straight portion being flush with the working surface of the seal jaw, a portion other than the straight portion is formed by flexible wiring. be able to.

Furthermore, if a straight portion 27a for lateral sealing by induction heating is formed on the working surface side of the seal jaw 21, the inductor farther from the working surface 26 of the seal jaw is straightened separately. The straight portions 27a and 27b of the inductor need not always be provided in parallel with each other, and may not have the same size and shape.

Next, based on FIG. 4 and FIGS. 9 to 17, the sealing portion of the pillow-shaped container provided below the horizontal sealing device in a suspended / moving state is cut, and the containers are cut off one by one.
The cutting device in the high-speed filling machine will be described.

Although not shown, a cutter elevating cam provided on the main shaft and a cutter opening / closing cam are coaxially supported at the base of the cutting device 30, and are provided above the cutter elevating cam and the cutter opening / closing cam. Are provided with swinging levers, and the driving force of the cutter lifting / lowering cam and the cutter opening / closing cam is transmitted to each lever by a cam follower. As shown in FIG. 9, a cutter elevating vertical rod 31 and a cutter opening / closing vertical rod 32 are attached to one end of each lever so as to be movable up and down, and when the cutter elevating cam and the cutter opening / closing cam rotate, the lever swings. The vertical rod 31 for raising and lowering the cutter and the vertical rod 32 for opening and closing the cutter move up and down in the vertical direction while having a certain timing.

Further, as described above, the mechanism for utilizing the fluid pressure such as a hydraulic cylinder, instead of the cam mechanism, vertically moves the cutter lifting / lowering vertical rod 31 and the cutter opening / closing vertical rod 32 while maintaining a constant timing. May be.

The other end of the vertical rod 31 is attached to the lower end of an oscillating frame 34 that oscillates around a shaft 33, and a cutting unit 40 is attached to the tip of the oscillating frame 34. I have. The vertical movement of the vertical rod 31 raises and lowers the swing frame 3.
4 and cutting unit 4 attached to it
0 swings about the shaft 33 as a fulcrum.

On the other hand, the other end of the cutter opening / closing vertical rod 32 is attached to one end of an L-shaped lever 35, and the vertical movement of the cutter opening / closing vertical rod 32 causes the L-shaped lever 35 to move.
The other end of the rod 3 rotates about a shaft 36, and the other end of the L-shaped lever 35 has one end connected to the cutter opening / closing rod 3.
7 moves back and forth. The other end of the cutter opening / closing rod 37 is connected to one right-angled portion of a substantially right-angled triangular link plate 41 provided in the cutting unit 40.

As shown in FIGS. 10 and 11, the cutting unit 40 includes a cutter holder member 43 having a cutter blade 42, a cutter housing member 44, a cutter receiving member 45, A link plate 41, a link plate support member 46, a block member 47, and two rods 48 communicating these members.
Having.

The two rods 48 have a small-diameter portion communicating the cutter holder member 43 and the cutter housing member 44, a cutter receiving member 45 and a link plate supporting member 4.
6 and a large-diameter portion communicating the block member 47. The cutter housing member 44 penetrated by the rod small-diameter portion cannot slide toward the large-diameter portion, but is slidable toward the cutter holder member 43. It is urged toward the member 45 and is locked at the large diameter portion. The end of the small-diameter portion of the rod is fixed to the cutter holder member 43 when penetrating the cutter holder member 43. Also,
At the large diameter portion of the rod, the cutter receiving member 45 and the link plate supporting member 46 are slidable.
It is stuck to.

On the upper surface of the link plate support member 46,
A link plate 41 is rotatably mounted.
As described above, the other end of the cutter opening / closing rod 37 is connected to one right-angled portion of the substantially right-angled triangular link plate 41. Links 50 and 51 are rotatably attached to two corners of the link plate 41 other than the right-angled corners. The other end of the link 50 is attached to the block member 47, and the other end of the link 51 is attached to the cutter receiving member. 45 respectively. In addition, the rotation axis 52 of the link plate 41 is the same
The cutter opening / closing rod 37
Is moved back and forth, the link plate 41 turns on the link plate support member 46 about the turning shaft 52.

When the cutter opening / closing rod 37 is retracted (from right to left in FIG. 9), the link plate 41 rotates counterclockwise, and as the link plate 41 rotates,
The link 50 pushes the block member 47, and the link 51 pushes the cutter receiving member 45. When the link 50 pushes the block member 47, the link plate support member 46 is fixedly fixed to the swing frame 34.
Reference numeral 7 moves to the left (the direction in FIG. 9, the same applies hereinafter). With the movement of the block member 47, the block member 47
The rod 48 fixed to the rod also slides through the communication hole provided in the link plate support member 46 and moves to the left, and as a result, the cutter holder member fixed to the end of the small diameter portion of the rod. 43 and a cutter housing member 44 urged leftward by a spring and locked at the large-diameter portion.
Also moves to the left.

When the link 51 pushes the cutter receiving member 45, the cutter receiving member 45 moves while sliding to the right, and acts as a cutting jaw in cooperation with the cutter housing member 44 moving to the left. And a seal portion formed between the containers.

When the link plate 41 further rotates counterclockwise, the link 50 causes the block member 4 to rotate.
7 is pushed to the left, and the cutter receiving member 45 is pushed to the right by the link 51. As a result, the cutter receiving member 45 is pushed.
And the cutter housing member 44 are pressed against each other, and the cutter housing member 44 slides rightward on the small-diameter portion of the rod against the elastic force of the spring 49 so that the cutter housing member 44 is pressed.
The cutter blade 42 fixed to the cutter holder member 43 protrudes from the through hole provided in the cutter holder member 43 and advances to the groove for receiving the tip of the cutter provided in the cutter receiving member 45, thereby cutting the seal portion between the containers. Is done.

When the cutter opening / closing rod 37 changes direction and starts moving forward, the link plate 41 rotates clockwise, and as the link plate 41 rotates, the link 5
The block member 47 and the cutter receiving member 45 are attracted to each other by the 0 and the link 51, follow the reverse course of the above-described cutting process, the cutter receiving member 45 and the cutter housing member 44 are separated from each other, and the cutter blade 42 retreats. Then, as the cutter opening / closing rod 37 alternately moves forward and backward, the seal portions of the suspended containers are cut one after another.

As described above, the link plate supporting member 46 is fixed to the swing frame 34 to which the vertical lifting rod 31 is connected. The vertical movement of the vertical lifting rod 31 causes the link plate supporting member 46 to move together with the swing frame 34. The cutting unit 40 itself also swings. The vertical swing of the cutting unit 40 is synchronized with the vertical movement near the bottom dead center of the horizontal seal jaw 21. Further, the cutting by the cutting unit 40 and the vertical swing of the cutting unit 40 are adjusted so as to be synchronized with each other. When the cutting unit 40 reaches the vicinity of the intended cutting point by the swing, the sealing unit is closed. Has been adjusted to make the cut.

Next, one mode of the drive timing of cutting and swinging in the horizontal seal jaw 21 and the cutting unit 40 will be described with reference to FIG. According to this embodiment, when the horizontal seal jaw 21 and the cutting unit 40 are both lowered, the vertical distance between the horizontal seal jaw 21 and the cutting unit 40 is set to be equal at a certain time t1, and the time t2 By temporarily delaying the lowering of only the cutting unit 40, that is, by moving the cutting unit 40 downward slightly after the lowering operation to reach the bottom dead center of the horizontal seal jaw 21,
The distance between the horizontal seal jaw 21 and the cutting unit 40 in the vertical direction is slightly reduced, and the cutting is performed after the time point t2. After the cutting, the distance reaches the bottom dead center t0 at the reduced distance.

In the case of this embodiment, as shown in FIG. 13, the cutter receiving member 4 constituting the cutting jaw
When the cutter 5 and the cutter housing member 44 are close to each other, the lowering speed of the cutting jaw is adjusted to be slightly slower than the lowering speed of the horizontal seal jaw, so that the cutting jaw serves as a guide for the seal portion. , Relatively rising while guiding the seal part,
As a result of contact at the boundary between the seal portion of the container and the tapered portion 12, the cutting portion is positioned, and cutting can be accurately performed at the intended cutting point. According to this embodiment, even when the angle θ formed by the tapered portions 12 of the pillow-shaped container is slightly large, and the tapered portion 12 of the container is unlikely to serve as a guide, cutting is performed accurately at the intended cutting point. be able to.

Another mode of the drive timing of cutting and swinging in the horizontal seal jaw 21 and the cutting unit 40 will be described with reference to FIG. According to this embodiment, when the horizontal sealing jaw 21 and the cutting unit 40 are lowered together, the cutting unit is arranged such that the vertical distance between the horizontal sealing jaw 21 and the cutting unit 40 is equal at a certain time t1. Is moved downward in synchronization with the lowering operation of the horizontal seal jaw to reach the bottom dead center, and then reaches the bottom dead center t0 while maintaining this distance,
It is arranged so that the cut is made at the intended time between time t1 and time t0.

In this embodiment, the positional accuracy of the cutting is slightly inferior to that of the embodiment shown in FIG. 12, but as shown in FIG. Since the taper portion 12 of the container serves as a guide for the cutting jaw, the cut portion is positioned by being formed into a slightly smaller size in the container forming device, so that the cut portion can be accurately positioned and cut at the intended cutting point of the seal portion. . Further, the container in a suspended state may slightly swing back and forth and right and left due to vibrations or the like due to high-speed molding. Even in such a case, as shown in FIG. By acting as a guide, the cutting portion is positioned, and can be cut accurately at the intended cutting point of the seal portion. Furthermore, even if the container itself is slightly vertically deformed due to the weight of the filling when the filling amount is as large as 1 liter, the deformation is corrected by the tapered portion 12 of the container serving as a guide for the cutting jaw. It is possible to cut accurately at the intended cutting point of the seal portion.

As shown in FIG. 17, a guide roller mounting plate 53 is integrally provided at both ends of the link plate support member 46, and a pair of container guide rollers 54 is provided at the upper end of the guide roller mounting plate 53. Can also. By providing such a guide roller 54, it is possible to substantially vertically hold the container located between the horizontal seal jaw 21 and the cutting unit 40 at the time of cutting, and the sealing portion in the suspended state And the cutting accuracy is improved.

In the above-described embodiment, the method of vertically moving the cutting unit 40 by swinging has been described. However, a method of moving the cutting unit 40 up and down in a horizontal state by a cam mechanism or a mechanism using fluid pressure. Can also be employed.

As described above, the filling and packaging machine according to the present invention is characterized by a horizontal sealing device and a cutting device. Other mechanisms of this type of filling and packaging machine, for example, a transport mechanism for a packaging web, The sterilizing mechanism for the packaging material web, the vertical sealing mechanism for forming the plate-shaped packaging material web into a tube, the unloading mechanism for the molded package, and the like are not particularly limited. Although it is also possible to use the one, it is desirable that the horizontal sealing device of the present invention can sufficiently exhibit the performance.

[0058]

That is, the present invention is to change the molten form of the inner plastic layer without using a material having high magnetic permeability and to prevent the molten portion of the inner plastic layer from becoming round toward the portion to be cut. The present invention relates to a sealing device that can be used.

Further, the horizontal sealing device of the present invention is particularly suitable for a high-speed filling and packaging machine capable of producing a filling and packaging container of 8,000 or more packs per hour, which has been considered impossible in the past, as well as a container. Since no liquid pool is formed in the seal portion between them, juice and the like do not adhere to the cut surface.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a conventional horizontal sealing jaw.

FIG. 2 is a schematic perspective view of the filling and packaging machine of the present invention.

FIG. 3 is a cross-sectional view of the packaging material web of the present invention.

FIG. 4 is an operation explanatory view of the horizontal seal jaw and the cutting device of the present invention.

FIG. 5 is a perspective view of the horizontal sealing device of the present invention.

FIG. 6 is a partially sectional perspective view of a seal jaw in the horizontal sealing device of the present invention.

FIG. 7 is a longitudinal sectional view of a seal jaw in the horizontal sealing device of the present invention.

FIG. 8 is a longitudinal sectional view of a seal portion sealed by the horizontal seal device of the present invention.

FIG. 9 is a longitudinal sectional view of the cutting device of the present invention.

FIG. 10 is a plan view of the cutting device of the present invention.

FIG. 11 is a perspective view of the cutting unit of the present invention.

FIG. 12 is an explanatory diagram of one mode of driving timing of the horizontal sealing jaws and the cutting unit in the present invention.

FIG. 13 is an explanatory diagram of a cutting operation in the case of the driving timing of FIG. 12 in the present invention.

FIG. 14 is an explanatory diagram of another aspect of the drive timing of the horizontal seal jaws and the cutting unit according to the present invention.

15 is an explanatory diagram of a cutting operation in the case of the drive timing of FIG. 14 in the present invention.

FIG. 16 is an explanatory view of a cutting operation when the container is shaking in the present invention.

FIG. 17 is a schematic perspective view of a container guide roller provided in the cutting device of the present invention.

[Explanation of symbols]

 Reference Signs List 10 Pillow container 21 Lateral seal jaw 26 Working surface of seal jaw 27 Inductor 29 Cooling water passage 34 Swing frame 37 Cutter open / close rod 40 Cutting unit 41 Link plate 43 Cutter holder member 44 Cutter storage member 45 Cutter receiving member 46 Link plate support Member 47 Block member 54 Guide roller

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yuji Katayama 1-10, Nishikawa, Taro, Yasu, Kitajima-cho, Itano-gun, Tokushima Prefecture Inside Shikoku Kakoki Co., Ltd. (72) Inventor Fumiyuki Iwano Kitajima-cho, Itano-gun, Tokushima Prefecture (72) Inventor Michio Ueda, No. 10 Nishikawa, Taro Yasushi, Kitajima-cho, Itano-gun, Tokushima Pref. 1 Shikoku Kakoki Co., Ltd.

Claims (7)

[Claims] 1. A transverse sealing device comprising a sealing jaw having an inductor having at least one straight portion for sealing an area including a cut portion of a tubular packaging material comprising a packaging material web having an aluminum foil layer. A straight sealing device, wherein one straight portion of an inductor for horizontally sealing by induction heating is disposed on the working surface side of the sealing jaw. 2. An inductor comprising two inductors extending parallel to each other.
2. The transverse sealing device according to claim 1, comprising two straight portions, one of the straight portions being embedded in the sealing jaw body. 3. The horizontal sealing device according to claim 1, wherein the inductor has one straight portion. 4. The horizontal seal according to claim 1, wherein one surface of one straight portion of the inductor disposed on the operation surface side of the seal jaw is flush with the operation surface of the seal jaw. apparatus. 5. The horizontal seal according to claim 1, wherein a cooling water passage having a reinforcing portion is provided inside one straight portion of the inductor disposed on the working surface side of the seal jaw. apparatus. 6. The horizontal sealing device according to claim 1, wherein the sealing jaw has no cutting mechanism. 7. A filling and packaging machine comprising the horizontal sealing device according to claim 1 and a cutting device provided below the horizontal sealing device.