JPH1179112A - Notch forming device for packaging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cope with the change of the notch-forming interval to be performed correspondingly to the change of horizontal seal forming interval by using a roll body for forming a single notch, to dispense with the change of parts associated with the notch-forming intervals, to reduce the cost, and to improve the productivity. SOLUTION: The rotational peripheral speed of a roll body 12 for notch forming is made to substantially coincide with the rotational peripheral speed of a longitudinal seal roll 5 by the speed signal from a speed setting device 14 when a blade body 13 of the roll body 12 for notch forming is brought into contact with at least a strip-like packaged body B based on an output signal to be outputted from a rotational position detecting means 18 according to the rotation of the roll body 12 for notch forming, and after the blade body 13 of the roll body 12 for notch forming is detached from the strip-like packaged body B, its peripheral speed is set to a value specified for a transmission gear 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film drawn from a raw film and continuously sealed by a vertical seal roll in a film feeding direction to form a tubular shape, and the film is transferred by a horizontal seal roll. The present invention relates to a notch forming device of a packaging device that forms a notch for opening, that is, an opening notch in a vertical seal portion of a band-shaped package body that is horizontally sealed at predetermined intervals in a direction crossing the direction.

[0002]

2. Description of the Related Art Conventionally, as disclosed in Japanese Utility Model Publication No. 50-10284, Japanese Patent Publication No. 5-36285 or Japanese Patent Publication No. 6-62134, this type of packing apparatus has been used. The film that is pulled out and continuously transferred is folded back, and the both edges are overlapped and vertically sealed along the film transfer direction, and the vertically sealed film is used to form a liquid, powder or viscous substance in a cylindrically formed film. The film is horizontally sealed at predetermined intervals in a direction intersecting with the direction of transport of the film to form a band-shaped package, and a cutting mechanism cuts the center of the horizontal seal to cut the packaging bag. There is known one that is separately discharged.

In such a packaging apparatus, there is provided a notch forming apparatus for forming a notch for opening, that is, a notch for opening, at an edge of a vertical seal portion of a belt-shaped package continuously transferred. is there.

According to this notch forming apparatus, the following two types are generally known.

One is to rotate a rotary blade body having a cutting blade at the tip on the side of the band-shaped package, and use the cutting blade of the rotary blade body to rotate the band-shaped package in a direction perpendicular to the conveying direction of the band-shaped package. This is a method of forming a notch by cutting the vertical seal portion from the edge by a predetermined length.

The other is to provide a pair of opposing rolls, and to project a protruding blade having a predetermined shape at a predetermined interval on an outer peripheral surface of at least one of the rolls. The notch is formed by sandwiching the vertical seal portion of the band-shaped package body between the roll bodies and pushing it off by the blade body.

However, the former notch forming apparatus using a rotary blade body has a structure in which the rotational speed is synchronized with the feed speed of the band-shaped package body for structural design or for setting and controlling the notch forming pitch. When the feed speed is low, the rotation speed of the rotary blade is also low, and the rotary blade cannot smoothly cut the vertical seal portion of the band-shaped packaging bag. And the notch shape is limited to a simple I-shaped cut shape according to this structure,
The latter notch forming device using a pair of roll bodies may be adopted as a device having a high degree of freedom with respect to a change in a notch shape or a change in production speed.

[0008]

However, in the above-mentioned notch forming apparatus using a pair of rolls, the protruding blades are generally provided at a constant interval (pitch) with respect to the outer peripheral surface of the roll. When the body is formed, the roll is driven to rotate at a constant speed that matches the speed of the belt-shaped package to be transferred, that is, the rotational peripheral speed of the horizontal seal roll. Is determined by the distance between the blades to be performed, that is, the arc length between the adjacent blades. For example, when the horizontal seal distance of the band-shaped package changes, a roll having a blade distance corresponding to the horizontal seal distance. It is necessary to prepare a plurality of types of expensive rolls corresponding to a plurality of types of packaging pitches, that is, intervals of the horizontal seal portions.

Further, in this case, a man-hour for selecting a notch forming roll having a blade body interval corresponding to the interval between the horizontal seal portions and attaching and detaching it to the machine is required, which hinders an improvement in productivity. Was.

Accordingly, the present invention can cope with a change in the notch forming interval performed in response to a change in the horizontal seal forming interval by using a single notch forming roll body, and can also provide a component associated with the change in the notch forming interval. It is an object of the present invention to provide a notch forming device for a packaging device which can reduce the cost and improve the productivity without requiring replacement.

[0011]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention is to form a cylindrical film by vertically transporting a film drawn from an original film and vertically sealing the film by a vertical seal roll in the transport direction of the film. A packaging device that forms a band-shaped package by laterally sealing at predetermined intervals in a direction intersecting the film transport direction with a horizontal seal roll, and a pair of rolls facing each other, and at least one of the rolls has an outer peripheral surface. A notch forming device for forming a notch in a vertical seal portion by providing a protruding blade body at a predetermined interval and nipping and conveying a band-shaped package body between the roll bodies, the vertical seal roll and the notch Separate drive motors respectively connected to the roll body of the forming apparatus, a common speed setting device connected to a motor controller for driving each of these drive motors, A rotational position detecting means for detecting a rotational position of the roll for forming a hitch, a transmission for inputting an output signal from the rotational position detecting means, and a motor controller for driving the transmission to drive the roll for forming the notch The notch forming roll body blade body contacts at least the band-shaped packaging body based on an output signal output from the rotation position detecting means in accordance with the rotation of the notch forming roll body. In this case, the rotational peripheral speed of the notch forming roll is substantially matched with the rotational peripheral speed of the vertical seal roll by the speed signal from the speed setting device, and the blade of the notch forming roll is in the form of a belt. After separating from the package, the peripheral speed is set to a predetermined value set in the transmission.

[0012]

According to the notch forming apparatus of the present invention, separate drive motors are provided for the vertical seal roll and the notch forming roll, respectively, and these drive motors are provided via respective motor controllers. The action of the blade body of the roll body for forming a notch can be achieved by setting the required speeds independently of each other for a common speed setting device and a transmission for a drive motor that rotates the roll body for forming a notch. At the time, that is, when the blade body of the notch forming roll comes into contact with the strip-shaped package, at the speed set in the speed setting device, the peripheral speed substantially equal to the rotational peripheral speed of the vertical seal roll is used. While the roll body can be rotated, when the blade body of the roll body for notch formation does not act,
In other words, when the blade of the notch forming roll is separated from the band-shaped package, the speed signal set in the transmission of the notch forming roll is changed to the notch forming based on the output signal of the rotational position detecting means. The rotation speed of the drive motor for the notch forming roll body is controlled to the speed set in the speed setting device by inputting it to the drive motor through the motor controller for the roll body for constant rotation. The drive motor for the vertical seal roll can be advanced or delayed according to the speed set in the transmission of the roll body for forming the notch.

With this arrangement, even if the notch forming roll is of one type and the blade body interval is fixed (constant), the notch forming roll is related to the speed set in the speed setting device. By selecting the set speed of the roll body to the transmission, it is possible to cope with the change of the notch forming interval performed in accordance with the changed interval of the horizontal sealing position of the band-shaped package, and to change the notch forming interval. This eliminates the necessity of replacing parts.

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a notch forming apparatus for a packaging apparatus according to the present invention.

In this embodiment, the overall outline will be described by taking as an example a filling and packaging machine shown in FIGS. 1 and 2 for filling a film with a liquid, powder or viscous substance.

A holding frame 2 is provided on the side of the machine base 1, and a material web R around which a shape F is wound is provided on the holding frame 2 so as to be detachable and replaceable.

The film F guided out of the film web R is given a predetermined tension via a film guide mechanism 3 and is guided upward once, and a film folding mechanism provided in the upper portion of the machine base 1 is provided. 4, the film F is folded in two along the longitudinal direction of the film F, and is guided downward.

In this embodiment, the folded edge portion, the intermediate portion, and the folded end portions of the folded film F conveyed downward are conveyed vertically by the vertical seal rolls 5 composed of a pair of heat seal rolls. A vertical seal portion S1 is formed by vertically sealing (both right and left edge portions and an intermediate portion), and then a first horizontal seal roll 6 composed of a pair of heat seal rolls respectively disposed below the vertical seal roll.
And the second horizontal seal roll 7 horizontally seals the horizontal seal portions S2 at predetermined intervals in the horizontal direction.

In this case, a horizontal seal portion S2 is formed by horizontal heat sealing at a predetermined interval in the horizontal direction by the first horizontal seal roll 6, and the horizontal seal portion S2 is first placed in the left and right juxtaposed state. A bottomed cylindrical bottom that forms one packaging bag P is formed, and thereby the content is filled from the filling nozzle portion 8A of the filling mechanism 8 into the film F formed into the bottomed cylindrical shape. After being fed, the first horizontal seal roll 6 horizontally seals the portion to be the bag opening of the film F, and the horizontal seal S2 formed by the horizontal seal seals the contents. By horizontally sealing again with the second horizontal sealing roll 7, the packaging bag P is formed by sealing the four sides of the film F, and the band-shaped packaging body B containing the contents formed by continuously forming the packaging bag P is continuously transported one after another. It is configured to be.

In this embodiment, a first horizontal seal roll 6 and a second horizontal seal roll 7 are provided below the vertical seal roll 5 in two stages.
Notch forming devices 9 to be described later are respectively arranged below and on the left and right of
Further, a perforated slitting device 10 for separation is disposed at the central vertical seal portion S1 of the packaging bags P arranged side by side on the lower side, and further below the horizontal sealing portion S2 between the upper and lower packaging bags P. A cutting device 11 for separating at the center is provided.

Therefore, in the present embodiment, the notch forming devices 9 on the left and right sides of the continuously formed band-shaped package B correspond to the notches corresponding to the respective packaging bags P on the vertical seal portions S1 on both outer sides of the band-shaped package B. N, forming the perforated slitter device 1
0, a perforation (not shown) is formed in the central vertical seal portion S1 and then cut by the cutting device 11 to form a packaging bag P in which packaging bags P having perforations for vertical separation are juxtaposed. It has become.

The notch forming device 9 according to the gist of the present invention will be described below with reference to FIGS. The notch forming device 9 of the present invention includes a pair of roll bodies 12 facing each other, and at least one of the roll bodies 12 is
A is provided, and a protruding blade body 13 is provided at regular intervals on a circumferential surface thereof. In the present embodiment, notch forming blades 13 are abutted at equal intervals at four locations on the circumference of the blade roll 12A.

The protruding blade body 13 has, for example, a rhombic protruding shape, and its tip end protrudes sharply in the outer peripheral direction, so that the band-shaped packaging body B is sandwiched between the protruding blade body 13 and the other flat receiving roll 12B. By nipping and transporting, the projecting blade 13 abuts against the receiving roll 12B, and the band-shaped package B
To form a notch N.

At this time, one of the triangular portions of the diamond-shaped blade body 13 is wrapped around the vertical seal portion S1 of the band-shaped package B, so that the V-shaped notch is formed at the edge of the vertical seal portion S1 of the band-shaped package B. N can be formed.

Hereinafter, a control method of the notch forming apparatus 9 of the present invention will be described in detail.

FIG. 5 is a block diagram showing a control method of the notch forming apparatus of the present invention. In FIG.
Reference numeral 12 denotes a notch forming roll body, and reference numeral 13 denotes its blade body.

Reference numeral 14 denotes a common speed setting device connected to a power supply (not shown). The speed setting device 14 is provided with two motor controllers 15 and 16 connected thereto. For each of the 16
Functions to output a speed signal corresponding to the set speed.

Here, one motor controller 15
Works to always rotate the drive motor 17 for the vertical seal roll at the set speed input to the speed setter 14, and the operation result of the drive motor 17 is transmitted to the motor controller 15 via, for example, a tachogenerator (not shown).
Will be fed back. Thus, based on the feedback signal, if the actual rotation speed of the drive motor 17 does not match the set speed, the motor controller 15 changes the motor rotation speed to correct the error.

Further, the other motor controller 16
In addition to the speed signal from the speed setting unit 14, the synchronizing signal from the motor controller 15 is received, and based on the output signal output from the rotational position detecting means 18 provided coaxially with the notch forming roll body 12, the blade When at least 13 is in contact with the strip-shaped package B, the drive motor 19 for rotating the roll body 12 for forming the notch is synchronized with the drive motor 17 for rotating the vertical seal roll 5 and rotated at a constant speed. Works.

Further, in this example, the rotational position detecting means 18 of the notch forming roll 12 is provided at four positions at equal intervals in the circumferential direction in relation to the notch forming roll 12. The proximity switch 21 is a sensor which is operated by detecting the presence of the projection 20 and detecting the presence of the projection 20. The output signal from the proximity switch 21 is separated from the band-shaped package B. A certain blade 13
Is output to the motor controller 16 via the transmission 22 previously input.

According to such a configuration, for example, the proximity switch 21 is operated by the detection projection 20 from immediately before the blade body 13 comes into contact with the band-shaped package B, and the speed change is performed during the operation of the proximity switch 21. By selecting a speed signal input from the speed setting device 14 to the motor controller 16 without selecting an input value to the machine 22, the notch forming roll body 12 and the vertical seal roll 5 , Resulting in synchronized constant speed rotation. On the other hand, when the detecting projection 20 is separated from the proximity switch 21 and is in the inactive state, in other words, when the blade 13 is separated from the band-shaped package B, the input value set by the transmission 22 is set. Is selected, the notch forming roll body 12 is rotationally driven at the required speed input by the transmission 22.

In practice, the speed setting device 14 and the transmission 22 described above are generally included in one control computer C.

According to this example, specifically, referring to FIG. 6, four blades arranged at equal intervals on the circumferential surface of a blade roll 12A which is one of the rolls 12 for forming the notch. The positions a1, a2, a3, and a4 of the two blades 13 that make a predetermined angle α toward the near side in the rotation direction are at predetermined positions, for example, two opposing roll bodies 12A and 12A.
When the position of the notch forming roll 12 and the vertical seal roll 5 is synchronized, the proximity switch 21 is set to operate when the position reaches the plane XX connecting the axis of B. The synchronous constant-speed rotation is performed by rotating the blades 13 at positions b1, b2, b at a predetermined angle β toward the rear side in the rotation direction.
3 and b4 are continued until they reach, for example, the plane XX, and thereafter, the notch forming roll body 12 until the next position a2, a3, a4 or a1 reaches the plane XX. At the required peripheral speed set in the transmission 22.

Here, the peripheral speed set for the transmission 22 is smaller or larger than the peripheral speed of the vertical seal roll 5 rotating at a constant speed, for example, as shown in FIGS. 7 (a) and 7 (b). The notch forming roll body 1
2, the notch N can be formed in the band-shaped package B at an interval longer than the arc length between the adjacent blades 13, and conversely, the notch forming roll 12
When the peripheral speed is increased, notches N can be formed in the band-shaped package B at intervals shorter than the arc length between the adjacent blades 13. It is needless to say that the set peripheral speed here can be the same as the peripheral speed of the vertical seal roll 5.

By doing so, in the apparatus of the present invention, the interval of notch N formation can be freely changed, so that it corresponds to the pitch of the packaging bag P to be changed, that is, the interval of the horizontal sealing portion S2 of the band-shaped package B to be changed. Then, it is possible to form a notch N formed at an edge of a predetermined position of the vertical seal portion S1 with reference to the horizontal seal portion S2 by adjusting the notch N by one kind of roll body 12 for forming a notch. become.

At this time, when the notch forming blade body 13 is in contact with at least the band-shaped package B, that is, during the notch forming operation, the rotational peripheral speed of the vertical seal roll 5, that is, the band-shaped package B Since the setting is made to match the transfer speed of B, it is possible to form a notch satisfactorily without wrinkling the belt-shaped package B or pulling it forcibly.

The present invention has been described with reference to the drawings.
When it is desired to form the notch N with a particularly large interval, a timer is provided in place of the transmission 22, and based on a signal from the rotational position detection means that is activated only immediately after the cutting by the blade 13 is performed, While the timer is in operation, the notch forming roll body 12 is stopped for a predetermined time, and after the elapse of the time, the notch forming roll body 12 is stopped.
Is rotated synchronously with the vertical seal roll 5 at the same peripheral speed until the cutting operation is completed. Also, after the notch forming roll body 12 has completed the notch formation by one of the blade bodies 13, It is also possible to rapidly rotate the blade body 13 to a position immediately before the start of notch formation, and wait for the next notch formation operation for a required time there.

Further, the rotational position detecting means is constituted by the proximity sensor 21 and the detecting projection 20. However, the present invention is not limited to this. For example, limit switches, optical sensors, magnetic sensors, pulse encoders, etc. Can also be configured by a combination of

In the embodiment, a V-shaped so-called V notch is formed so that the notch forming position is easy to understand and easy to open. However, other notch shapes such as a square shape and a semicircle shape are adopted. Good.

In this embodiment, as the roll body 12 for forming the notch, one of the blade rolls 12 having the blade body 13 is provided.
A, and the other is configured as a flat receiving roll 12B without the blade body 12, but the notch forming roll body 12B is used.
The protruding blades 13 may be provided on both sides of the belt, and when the blades 13 coincide with each other, the notch N may be formed by transporting the band-shaped package B between the blades.

In this embodiment, when the blade body 13 of the notch forming roll 12 is in contact with at least the strip-shaped package B, the rotational peripheral speed of the notch forming roll 12 is set to the length of the vertical seal. The rotation speed of the rolls, that is, the transfer speed of the band-shaped package B was almost matched, but the rotation speed of the notch forming roll body 12 was adjusted to be slightly higher than the transfer speed of the band-shaped package B. By doing so, it may be set so as to improve the cuttability for forming the notch.

[0042]

As described above, according to the present invention, it is possible to cope with the change of the notch forming interval which is performed in response to the change of the horizontal seal forming interval by using a single notch forming roll body. It is possible to provide a notch forming device of a packaging device which can reduce the cost and improve the productivity by eliminating the necessity of replacement of parts due to the change.

[Brief description of the drawings]

FIG. 1 is a front view showing an outline of a filling and packaging machine to which the present invention is applied.

FIG. 2 is a perspective view showing an outline of a filling and packaging machine to which the present invention is applied.

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

FIG. 4 is a perspective view showing a main part of one embodiment of the present invention.

FIG. 5 is a block diagram showing one embodiment of the present invention.

FIG. 6 is an explanatory view showing a relationship between a rotational angle position and a peripheral speed of a roll body for forming a notch according to the present invention.

FIG. 7 is a diagram showing a relationship between a peripheral speed of a notch forming roll body and a peripheral speed of a vertical seal roll according to the present invention.

[Explanation of symbols]

 Reference Signs List 5 vertical seal roll 6 first horizontal seal roll 7 first horizontal seal roll 9 notch forming device 12 roll body 13 blade body 14 speed setting device 15 motor controller 16 motor controller 17 drive motor 18 rotation position detecting means 19 drive motor 22 Transmission F Film R Film raw material B Band-shaped package N Notch P Packaging bag

Claims (1)

[Claims] 1. A film drawn from an original film is vertically sealed in a film transfer direction by a vertical seal roll while being continuously transferred, and is formed into a tubular shape. The film is drawn in a direction intersecting the film transfer direction by a horizontal seal roll. A packaging device that forms a band-shaped package by horizontally sealing at a predetermined interval, and a pair of rolls facing each other, at least one of the rolls is provided with a protruding blade at a predetermined interval on the outer peripheral surface thereof, A notch forming device that forms a cut in a vertical seal portion by sandwiching and conveying the band-shaped package between the rolls; and individual drives connected to the vertical seal roll and the roll body of the notch forming device, respectively. A motor, a common speed setting device connected to a motor controller for driving each of these drive motors, and detecting a rotational position of the notch forming roll body A shift position detecting means, a transmission for inputting an output signal from the rotational position detecting means, and the transmission connected to the motor controller for driving the roll for forming the notch. Based on an output signal output from the rotation position detecting means in accordance with the rotation of the roll, the notch forming roll is provided when the blade of the notch forming roll is in contact with at least the band-shaped package. The rotational peripheral speed of the body is substantially matched with the rotational peripheral speed of the vertical seal roll by a speed signal from the speed setting device, and after the blade body of the notch forming roll body is separated from the band-shaped packaging body. Is a notch forming device for a packaging device, wherein the peripheral speed is set to a predetermined value set in the transmission.