JPH10297616A - Film fusing/cutting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cut a film by the full use of the entire blade faces of a pointed- knife type cutter and extend the life of the cutter, by cutting the film in such a way that a cutter means is reciprocated in a direction perpendicular to the surface of the film by a cutter-moving means and, at the same time, moved in the direction of the width of the film. SOLUTION: When a stack item M moved on a front conveyor 1 strikes against a film F stretched downstream, a film feeder B is actuated and the film F is drawn out by a proper amount, and consequently the stack item M moves onto a rear conveyor 2 while wrapped in the film F into the shape of horizontally-turned letter U. Then, a stack-item-compressing device D is actuated and the stack item M is compressed, thereafter film fusing/cutting device C is actuated, so that the upper film (f) and lower film (f') are fused and cut by sealing bases 8 and 9 on the side of the rear end of the stack item M. At the time, while reciprocating in a direction perpendicular to the surface of the film by the action of a groove cam 41, a cutter means 42 in the sealing base 8 moves in the direction of the width of the film, thereby cutting the film F.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film wrapping and wrapping apparatus for wrapping a laminate with a film, and wrapping and severing the ends of the wrapped film when wrapping the laminate. .

[0002]

2. Description of the Related Art Film welding / cutting devices are described below.
Japanese Patent Publication No. Sho 61-43686, "Film Sealing and Cutting Apparatus for Packaging Machine", Japanese Utility Model Publication No. 63-3923, "Film Sealing and Cutting Apparatus for Packaging Machine" and Japanese Utility Model Publication No. Sho 61-19502, What is shown in "Safety mechanism in welding / cutting device of packaging machine" is known.

The construction disclosed in Japanese Utility Model Publication No. Sho 61-43686, entitled "Film Sealing and Cutting Apparatus for Wrapping Machines" is such that an upper sealer and a lower sealer are provided so as to face each other, and are provided on an upper body of the upper sealer. A seal body is attached to the guide body, and a seal body corresponding to the seal body is provided on the lower body of the lower sealer. In the guide body of the upper sealer, the knife holder divided into two at the center is outwardly arranged at the center of the width. The knife holder is provided so as to be slidable, a plurality of knives having an oblique cutting blade on the outside are hung down, and adjacent knives are united at the center so that the tips thereof coincide with each other. It has become. When the upper and lower films are cut with a knife during welding, the upper and lower films are sandwiched and sealed by the sealing members of the upper sealer and the lower sealer. Pierce the film. At this time, the knives whose tips coincide with each other at the center of the knife holder are also directly in contact with the film, and then the holder is simultaneously moved to both outer sides, whereby the film is cut.

[0004] Japanese Unexamined Utility Model Publication No. Sho 63-3923 discloses a "sealing and cutting device for a film of a packaging machine", which has an upper sealer and a lower sealer opposed to each other.
A seal is provided on the guide body provided on the upper body of the upper sealer so as to be vertically movable via a spring, and a projecting plate is provided on the upper surface of the seal body provided on the lower body of the lower sealer to guide the upper sealer. A knife holder is provided in the body so as to be slidable in the width direction thereof, and a knife hanging on the knife holder can be inserted between the projecting plates of the lower sealer, and the tip of the knife does not project from the sealing surfaces of the upper and lower sealers. It is configured as described above. Then, both the upper and lower films are sealed, and when cutting the films, the central portion of the film is lifted up with a projecting plate provided on the lower sealer, and a knife provided on the upper sealer for the film of the raised portion. When the knife holder holding the knife moves in the width direction, the film is cut.

[0005] Japanese Unexamined Utility Model Publication No. Sho 61-19502 discloses a "safety mechanism for a welding / cutting device of a packaging machine", which has a configuration in which a plurality of films are formed by a pair of seal bars arranged opposite to each other. In a packaging machine that sandwiches and welds and cuts, a configuration in which detectors are respectively provided near the seal bars themselves on both sides of the seal bar or near a contact position thereof so as to be operable by engagement with one or both of the seal bars. It has become. An operating signal is transmitted to the cutting means only when the two seal bars are in full contact with each other to activate the cutting means to operate the cutting means. In other words, if an individual similar object such as a finger is mistakenly pinched during the collision operation of both seal bars, further operation of the seal bar becomes impossible, at least one of the detectors will not operate, and the operation of the cutting means will not be possible. Becomes

[0006]

Each of the above prior arts has several problems to be solved. That is, Japanese Utility Model Publication No. Sho 61-43686 discloses a "sealing and cutting device for a film of a packaging machine" in which two knives are provided adjacent to the center division of a knife holder so that the tips thereof coincide with each other. On the outside of each of the knives, a plurality of knives each having an oblique cutting blade on the outside are hung down on the knife holder, and the knife holder is provided with a slidable outward slidable in the width direction. A sealing and cutting device is shown. Since the knife that cuts the film moves the same level outward by the air cylinder to cut the film, the part used to cut the film in the knife cutting always uses a fixed part. For this reason, only a part of the cutting blade of the knife wears quickly, and the other cutting blade part may be cut well, but the film may not be cut, resulting in a short knife life. The task remained, and the knives had to be changed frequently. In addition, the knife holder and the knife holder moving part are divided into two parts at the center of the film, and the symmetrical construction and operation are performed, so that the number of parts increases and the mechanism becomes complicated. Also, no safety measures have been considered when a finger or the like is mistakenly pinched between the upper sealer and the lower sealer.

[0007] Japanese Utility Model Publication No. 63-3923 discloses an apparatus for sealing and cutting a film of a packaging machine. In cutting a film, a knife is always positioned above a sealing surface. There is shown a film sealing and cutting device of a packaging machine devised so that it can be lifted to apply tension to a cutting portion and cut it sharply.

However, no matter how the tension is applied to the cutting portion, the knife moves the same level in the width direction together with the knife holder to cut the film, so that the knife is used for cutting the film with the cutting blade of the knife. The parts always use certain places. For this reason, only a part of the cutting blade of the knife wears out quickly, and the other cutting blade part may be cut sufficiently but the film may not be cut, resulting in a short knife life. However, the knife had to be changed frequently. Also, in terms of safety, the knife is always above the sealing surface, so if a finger or the like is mistakenly pinched between the upper and lower sealers, the finger will not be damaged by the knife, but strong force will be applied between the upper and lower sealers. No matter how much the finger was pinched, no matter how much the finger was pinched, no matter how much it went through the spring.

Japanese Unexamined Utility Model Publication No. Sho 61-19502 discloses a "safety mechanism in a welding / cutting device of a packaging machine", which discloses a packaging machine in which a plurality of films are welded / cut by a pair of seal bars arranged opposite to each other. A safety device is shown in which detectors are provided at both ends of the seal bar and the cutting means does not operate unless the detectors on both sides are activated. That is, when a finger or the like is mistakenly pinched by a pair of seal bars arranged to face each other, at least one of the detectors is actuated, and the cutting means does not operate, so that the finger or the like is not damaged. However, the fingers and the like are still sandwiched between the pair of seal bars, and the pair of the seal bars are pressed with a strong force, so that the damage of the fingers and the like was not prevented.

[0010] The present invention is to solve the problems of the prior art at once, by cutting the film using the entire blade surface of the cutter evenly.
It is an object of the present invention to provide a device that extends the life of the cutter and thus reduces the frequency of changing the cutter. In addition to the above, even when a foreign substance such as a finger is caught between the first and second seal bases, an abnormality is quickly detected, the cutter moving means is disabled, and the first and second seal bases are quickly opened. An object is to provide a device with excellent safety. Furthermore, in addition to the above, a plurality of cut-out cutters are arranged so that the leading ends of the cutters face the film surface at appropriate intervals, and the inclined blades are attached so as to be substantially parallel and move in the same direction. Accordingly, it is an object of the present invention to provide a device in which the number of parts is reduced and maintenance is easy.

[0011]

In order to achieve the above object, according to the first aspect of the present invention, a first seal base and a second seal base are provided to face each other, and both seal bases are moved relative to each other by moving means. In a film packaging machine that moves in the direction in which a plurality of continuous films are overlapped and sandwiched at a predetermined position, and is welded and cut in the width direction of the film, the film is provided on the first seal table so as to be spaced apart and opposed in the feeding direction of the film packaging machine. A pair of first seal holders, a pair of second seal holders provided on the second seal base in opposition to each of the pair of first seal holders, and a cutter provided between the pair of first seal holders. And a cutter moving means provided so that the cutter means can be moved in the width direction of the film while being reciprocated in a direction perpendicular to the film surface.

According to a second aspect of the present invention, a first seal base and a second seal base are provided so as to face each other, and both seal bases are moved in opposite directions by a moving means. And a pair of first seal holders provided on the first seal base so as to be spaced apart from each other in the feed direction of the film packaging machine, and the pair of first seal holders. A pair of first film retainers provided outside each of the one seal retainer, a pair of second seal retainers provided on the second seal base in opposition to each of the pair of first seal retainers, and a pair of first films A pair of second
A pair of second film retainers provided outside each of the seal retainers, cutter means provided between the pair of first seal retainers, and a width of the film while reciprocating the cutter means in a direction perpendicular to the film surface. And a cutter moving means provided so as to be able to move in the direction.

According to a third aspect of the present invention, a first seal base and a second seal base are provided so as to face each other, and both seal bases are moved in opposite directions by a moving means. And a pair of first seal holders provided on the first seal base so as to be spaced apart from each other in the feed direction of the film packaging machine, and a pair of first seal holders. A pair of first film presses, each of which has a distal end protruding from the distal end of the first seal press to form a step outside each of the seal presses, and are displaceably provided with respect to the first seal press so as to eliminate the step. And a pair of second seal holders provided on the second seal base in opposition to each of the pair of first seal holders, and a pair of second seal holders in opposition to each of the pair of first film holders. A pair of second film retainers provided outside each of the seal retainers, cutter means provided between the pair of first seal retainers, and a width of the film while reciprocating the cutter means in a direction perpendicular to the film surface. Cutter moving means provided so as to be able to move in a direction, a first position detector for detecting that the pair of first film presses has reached the predetermined position, and a first seal for the first film press. A second position detector for detecting that a predetermined state of displacement has been reached with respect to the presser, when a detection signal of the second position detector is output without outputting a detection signal of the first position detector In addition, the cutter moving means is deactivated, and control is performed so as to open between the first seal base and the second seal base.

According to a fourth aspect of the present invention, in any one of the first to third aspects of the present invention, the cutter means comprises a plurality of cut-out cutters, each of which has a tip facing a film surface and a blade. Are provided substantially parallel to each other and provided at appropriate intervals in the width direction of the film, and the cutter moving means is provided so that the cutter means can be moved in the width direction of the film by at least the same distance as the largest of the appropriate intervals. It has a configuration.

[0015]

According to the first aspect of the present invention, since the first seal base and the second seal base are moved in opposite directions by the moving means, the first seal base and the second seal base are positioned between the two seal bases. The plurality of films are pressed and welded by the first seal holder provided on the first seal base and the second seal holder provided on the second seal base. Thereafter, the film is cut by moving the cutter means by the moving means. At this time, the cutter means moves in the width direction of the film while reciprocating in the direction perpendicular to the film surface.

According to the second aspect of the present invention, by moving the first seal base and the second seal base in opposite directions,
The plurality of films located between the seal bases are pressed by the first seal holder and the first film holder provided on the first seal base and the second seal holder and the second film holder provided on the second seal base. Welded. Thereafter, the film is cut by moving the cutter means by the moving means. At this time, the cutter means moves in the width direction of the film while reciprocating in the direction perpendicular to the surface of the film.

According to the third aspect of the present invention, the first seal base and the second seal base are moved in opposite directions.
The plurality of films located between the seal bases are pressed by the first seal holder and the first film holder provided on the first seal base and the second seal holder and the second film holder provided on the second seal base. Welded. At this time, the first film retainer abuts on the second film retainer earlier than the first seal retainer by the step difference protruding from the tip end of the first seal retainer, and sandwiches the film earlier than the first and second seal retainers. Then, by the movement of the first seal holder, the first film holder is displaced so that the step is eliminated. Thereafter, the film is cut by moving the cutter means by the moving means. At this time, the cutter means moves in the width direction of the film while reciprocating in the direction perpendicular to the surface of the film. At this time, a normal state when the first and second seal bases contact each other is detected by the first and second position detectors, and a foreign object such as a finger is caught between the first and second seal bases. Sometimes, the detection signal of the first position detector is not output, and an abnormality is detected. As a result, the cutter means is deactivated, and the first and second seal bases are opened.

According to the fourth aspect of the present invention, the film is cut by moving the cutter moving means in one direction by the same distance as the largest distance between the cutters arranged at appropriate intervals in the width direction of the film.

[0019]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view of the film welding / cutting apparatus according to the present invention, and FIG. 2 is a perspective view showing details of mounting the first and second position detectors. 3 to 6 show:
FIG. 1 is a cross-sectional view as viewed in the direction of the arrow X in FIG. 1 and FIG. 7 is a cross-sectional view as viewed in the direction of the arrow Y in FIG. 8 to 10 are front views showing the operation of the cutter in the film welding / cutting device of the present invention. FIG. 11 is an overall view of a film packaging machine provided with the film welding / cutting device according to the present invention. FIG.
5 is a time chart showing the operation of a film packaging machine including a film welding / cutting device.

As shown in FIG. 11, the film packaging machine comprises a laminate feeder A, a film feeder B, a film welding / cutting device C, and a laminate compressing device D. The laminate feeder A includes a front conveyor 1 provided on the upstream side in the feed direction of the film packaging machine, a rear conveyor 2 provided on the downstream side, and a position detector 50 mounted therebetween.
And a front conveyor 1 and a rear conveyor 2
To move the laminate M such as newspaper, and the position detector 50
Thus, a passing position of the laminate M at a predetermined position is detected.

The film feeder B comprises an upper film roll 3, a lower film roll 4, film roll driving rollers 60, 60, guide rollers 5,..., Dancer rollers 6, 6, and film feed rollers 7, 7. The film is supplied by film feed rollers 7, 7 for film packaging of the laminate M on the rear conveyor 2, and the film drive rollers 60, 60
The film is drawn from the upper film roll 3 and the lower film roll 4 to replenish the film consumed in the film packaging so that the dancer rollers 6, 6 are always at the lower end.

Film welding / cutting device C according to the present invention
The first seal base (hereinafter referred to as an upper seal base in the description of the embodiment) 8, the second seal base (hereinafter referred to as a lower seal base) 9, and the movement of the upper seal base 8 Means (hereinafter referred to as an upper hydraulic cylinder in the description of the embodiment) 11 and means for moving the lower seal base 9 (hereinafter referred to as a lower hydraulic cylinder in the description of the embodiment) 12
, Cutter means 42, cutter moving means 45, and first and second position detectors 51, 52, 52 for detecting whether the upper seal base 8 is operating in a normal state. The upper and lower films f and f 'surrounding the laminate M are welded and cut.

The laminate compressing device D includes a pressing means 13,
The fluid pressure cylinder 14 which is a moving means of the pressing means 13
The stack M is compressed by the lowering of the holding means 13 to adjust the packing form.

The details of the film welding / cutting device C according to the present invention are shown in FIG. 1 by the cylinder rod 16 of the upper fluid pressure cylinder 11 fixed to the upper center of a frame 15 framed vertically and horizontally. The leading end of the upper main body 17 is arranged at the leading end so as to be substantially parallel to the width direction of the film and substantially parallel to the axial direction of the upper and lower film rolls 3 and 4.
However, at the tip of the cylinder rod 18 of the lower fluid pressure cylinder 12 fixed to the lower center of the frame 15,
Similarly, the lower main body 19 is connected so as to be substantially parallel to the width direction of the film and substantially parallel to the upper main body 17. Guide grooves 22, 22, 23, and 23 are provided on both end surfaces of the upper body 17 and the lower body 19, respectively, and the guide grooves 22, 22, 23, and 23 are fixed to both side surfaces of the frame 15. The guide plates 20, 20 are movably engaged with convex portions 21, 21 provided on the guide plates 20, 20, respectively.

Below the upper body 17, the above-mentioned upper seal base 8 is provided. In detail, as shown in FIGS. 1 and 3, through shafts 24, 24 are formed on both sides of the upper main body 17, which are closer to the outside than the center in the width direction of the film, along the holes passing through the upper main body 17. It is slidably mounted in the direction. The lower ends of the through shafts 24, 24 are provided to be longer than the film width in the width direction of the film in a state in which they are substantially parallel to each other with a space therebetween, and are separated from each other in the feed direction of the film packaging machine. Seal holder (hereinafter referred to as an upper seal holder in the description of the embodiment) 25,
25 are connected together with appropriate ones of a plurality of brackets 26. The compression springs 27, 24 are provided on through shafts 24, 24 between the brackets 26 and the upper body 17.
27 are provided. Further, the upper body 1 of the through shafts 24, 24
Nuts 35, 35 serving as stoppers are provided on the upper protruding side of 7 to prevent the upper seal retainers 25, 25 from being separated from the upper main body 17. Upper seal holder 25, 25
On the outside of the upper seal retainers 25, a pair of plate-like first film retainers 28, 28 having substantially the same length as the upper seal retainers 25 (hereinafter referred to as an upper film retainer in the description of the embodiment) are provided. The upper seal retainers 25, 25 are formed substantially parallel to the upper end of the upper seal retainers 25, 25 to protrude beyond the ends of the upper seal retainers 25, 25 to form a predetermined step.
Is provided so as to be displaceable so as to eliminate this step. That is, downward pins 29 are attached to both sides of each of the plurality of brackets 26 to which the upper seal retainers 25 are attached, and the compression springs 30 are attached to the plurality of pins 29, respectively. , And the tips of the pins 29...
The upper film retainers 28, 28 are displaceably inserted into holes that are opened at the upper portions of the upper seal retainers 25, 2.
5 so as to be movable up and down. As shown in FIGS. 1 and 7, the upper film retainers 28, 28 are provided with an oval stepped groove 28a at a plurality of locations in the film width direction. The upper film retainers 28, 28 are pressed so as to be able to be displaced up and down by holding metal fittings 31 attached to the outer surface of the upper seal holders 25, 25.
To prevent it from separating from the outside. The holding metal member 31 regulates the upper film holding members 28, 28 so as not to be displaced in the film width direction.

As shown in FIGS. 1 and 2, a second bracket is provided on either one of the inner sides of the upper seal retainers 25, 25 in the film width direction.
Position detectors (hereinafter sometimes referred to as limit switches in the embodiments) 52, 52 are mounted with their detection units facing upward. On both sides of the pair of upper seal retainers 25, 25 in the film width direction, fulcrum brackets 56, 56 are attached over the upper portions thereof.
A lever 53 supported so as to be angularly displaceable at 8 is provided. One end of the lever 53 is
Is reached so that it can come into contact with the detection section of the limit switch 52 by the angular displacement of. The other end of the lever 53 is formed in a T-shape, and both ends of the horizontal bar portion are suspended so as to straddle a pair of upper seal holders 25, 25. 28 is provided so as to be able to come into contact with the upper surface. Further, the other end of the lever 53 has the center of the horizontal bar portion connected to an appropriate position, for example, the other end of a tension spring 57 having one end connected to the bracket 26 located closest thereto. Lever 53 by force
Is pulled down. Therefore, the other ends of the levers 53, 53 are pushed up by the upward displacement of the upper film retainers 28, 28, and one end contacts the limit switches 52, 52, so that the limit switches 52, 52 operate. It has become.

Limit switches 52, 52 and lever 5
As shown in FIG. 5, the lower surfaces of the upper and lower film retainers 28 and 28 and the upper surfaces of second film retainers 34 and 34 (hereinafter referred to as lower film retainers in the description of the embodiments) are shown in FIG. Are sandwiched between the films f and f ', the lower surface of the upper seal retainers 25, 25 and the nichrome on the upper portions of the second seal retainers 32, 32 described below (hereinafter referred to as lower seal retainers) 32, 32. Line 3
When the films 3 and 33 sandwich the films f and f ', the limit switches 52 and 52 are adjusted to operate. That is, the step between the lower surfaces of the upper film retainers 28, 28 and the lower surfaces of the upper seal retainers 25, 25
Limit switch 5 at a position equal to the thickness of 3, 33
2, 52 operate. The nichrome wires 33, 33 are
Touching the film f 'when the lower seal base 9 is raised from the standby position so that the melted film is well separated when the film is welded, which will be described later, and damages the film f' by heat. It is covered with a Teflon sheet so that there is no.

The lower seal base 9 is provided above the lower main body 19. More specifically, as shown in FIG. 3, a pair of lower seal retainers 32, 32 are provided substantially in parallel with the upper seal base 8 and longer than the width of the film, and are spaced apart and opposed in the feeding direction of the film packaging machine. Is attached to the upper part of the lower body 19. Lower seal holder 3
Nichrome wires 33, 33 which are longer than the film width are provided in two rows on the upper surfaces of the grooves 2, 32 with a groove-shaped space interposed therebetween.
After the Nichrome wires 33, 33 are energized and heated to a high temperature, the current is turned off, and the films f, f 'are welded according to the residual temperature of the Nichrome wires 33, 33. Lower seal holder 32,3
A pair of plate-like lower film holders 34, 34 each having substantially the same length as the lower seal holders 32, 32 are sandwiched between the lower seal holders 32, 32 so as to sandwich the lower seal holders 32, 32 on the outer side of the lower seal holders 32, 32. It is provided. This lower seal base 9
The lower seal holders 32, 32 and the lower film holders 34, 34 respectively have upper seal holders 25, 25 and upper film of the upper seal base 8 when the upper and lower seal bases 8, 9 move by a predetermined amount in the facing direction. Hold down 2
8 and 28, and are provided so as to oppose each other so as to pressurize.

The predetermined movement of the upper and lower seal bases 8 and 9 in the vertical direction, in particular, the movement of the upper film holders 28 and 28 to the predetermined position by this movement, that is, the lower film holders 34 and In order to detect that the upper surface 34 and the lower surface of the upper film holders 28 of the upper seal stand 8 are in contact with each other, a first position is detected via a bracket on the side surface of the frame 15 in order to detect that the predetermined position shown in FIG. (Hereinafter referred to as a proximity switch in the description of the embodiment) 51 is provided. When the upper film retainers 28, 28 reach the predetermined position, the proximity switch 51 operates the upper film retainers 28, 28.
And the brackets 54, 54 attached to the upper seal retainers 25, 25 provided with a predetermined step.
Is detected.

As shown in FIGS. 7 and 8, a cutter means 42 is provided in a space between the upper seal retainers 25, 25 facing and separated from each other in the feeding direction of the film packaging machine. In detail, a plurality of cut-out cutters 36 are arranged in a plate-like shape longer than the film width at appropriate intervals, with the tips facing downward, that is, facing the film surface, and the inclined blades being substantially parallel. It is mounted on a cutter mounting plate 37. A plurality of plate-like support plates 38 are provided on the cutter mounting plate 37 in the film width direction, and each of the support plates 38 is mounted so as to penetrate the plate and protrude to both sides. 39, the support plate 3 of the support shaft 39
The bearings 40, 40 are respectively attached to the shaft portions on both side ends protruding from the upper end of the shaft. The bearings 40, 40 are mounted on the groove seals 4 so as to be substantially parallel to and opposed to each other via a space in which a support plate 38 is disposed above the upper seal retainers 25, 25.
Into the 1, 41 wavy grooves 46, they are movably incorporated along the wavy grooves 46. Therefore, the cutter mounting plate 37 and the cutters 36.
Each bearing 4 is provided with 1, 41 wavy grooves 46.
By being supported, 0 and 40 are supported in a form floating in the space between the opposing upper seal retainers 25 and 25.

A cutter moving means 45 is provided above the cutter means 42. Cutter moving means 45
Are connected to the upper seal holder 25, 2 via the bracket 55.
5, and a cylinder rod 44 thereof is connected to one end of at least one of the plurality of support plates 38 as shown in FIGS. 7 and 8 to 10. .

The cutters 36 are mounted so that their inclined blades are substantially parallel, and the cutter mounting plate 37 is moved in one direction, so that only one hydraulic cylinder 43 of the cutter moving means 45 is required, and the number of parts is small. At the same time, the mechanism is simple.

When the lower surfaces of the upper seal retainers 25, 25 are covered with a Teflon sheet, the melted film can be separated more easily when the film is welded as described later, and the melted film adheres. Can be prevented.

Next, the operation of the embodiment will be described.
As shown in FIGS. 11 and 12, in the overall operation of the film packaging machine, the laminate M which has been moved on the front conveyor 1 by the laminate feeder A is stretched downstream of the front conveyor 1. It collides with the film curtain F and enters. At this time, the position detector 50 detects the laminate M, and the film feeder B operates according to this detection signal, that is, the time corresponding to the time that the leading end of the laminate M reaches the film curtain F from the output of the detection signal of the position detector 50. After an appropriate timer set time (T ₁ in FIG. 12), the upper and lower film feed rollers 7 are rotated, and the dancer roller 6 is moved upward by drawing a suitable amount of film and feeding the film. The laminate M moves on the rear conveyor 2 while being wrapped in a film in a horizontal U-shape, and from the detection signal output of the position detector 50, the rear end of the laminate M passes through the installation position of the film welding / cutting device and is determined. After an appropriate timer set time (T ₂ in FIG. 12) sufficient to reach the position, the front conveyor 1 and the rear conveyor 2 temporarily stop. Next, similarly, after an appropriate timer set time (T ₃ in FIG. 12) slightly longer than the timer set time T ₂ from the detection signal output of the position detector 50, the laminate compressing device D operates, that is, the fluid pressure cylinder 14 The holding device 13 descends due to the extension of the cylinder rod 10, and compresses the laminate M.

Further, after an appropriate timer set time (T ₅ in FIG. 12) slightly longer than the operation of the laminate compressing device D from the detection signal output of the position detector 50, the film welding / cutting device C according to the present invention is used. Operates. In operation, the upper seal base 8 and the lower seal base 9 are operated by extension of the cylinder rods 16 and 18 of the upper and lower fluid pressure cylinders 11 and 12. However, after an appropriate timer set time (T ₄ in FIG. 12) from the detection signal output of the position detector 50, that is, the upper film holders 28 of the upper seal base 8 and the lower film holder 3 of the lower seal base 9.
Shortly before contact with the fluid feed cylinders 4, 34, the pressing rollers of the upper and lower film feed rollers 7, 7 of the film feeder B are opened, and the fluid pressure cylinder 14 of the laminate compressing apparatus D is opened.
The cylinder rod 10 slightly,
3 is slightly separated from the upper surface of the laminate M. Then, the dancer rollers 6, 6 which have been moved upward move downward by their own weight, and the films f, f 'are pulled toward the film feed rollers 7, 7 to remove the slack. Then, it is detected by a detector (not shown) provided at the lowermost end that the dancer rollers 6, 6 have not descended to the lowermost end, which is the initial position, so that the dancer rollers 6, 6 move to the lowermost end. The film is pulled out from the upper and lower film rollers 3, 4 by the film roll driving rollers 60, 60.
Thereafter, after the limit switches 52, 52 and the proximity switch 51 detect that the upper seal base 8 is in an appropriate state, as will be described later, the film f on which the laminate M is wrapped in a horizontal U-shape. And the lower film f 'is welded and cut.

Thereafter, as shown in FIG. 12, an appropriate timer setting time (T ₈ in FIG. 12) sufficient for film welding / cutting is satisfied based on the satisfaction of the AND condition of the detection signals of the limit switches 52 and 52 and the proximity switch 51. ,
T ₇ ) After that, the pressing means 13 of the laminate compressing device D and the upper and lower seal stands 8, 9 of the film welding / cutting device C are mounted on the cylinder rods 10, 16, 18 of the respective fluid pressure cylinders 11, 12, 14. Return to standby position by shortening,
After the AND conditions are satisfied, the laminated material M is packed by the start of the operation of the rear conveyor 2 after an appropriate timer set time (T ₁₀ in FIG. 12) slightly longer than the timer set times T ₇ and T ₈ . Discharged from the machine to complete the packaging cycle.

Next, the operation of the film welding / cutting device C according to the present invention will be described. As a general rule, as described above, the film f is moved relative to the upper and lower films f and f 'in a state where the laminate M moves from the front conveyor 1 to the rear conveyor 2 and is wrapped in a horizontal U shape by a film. ,
Activated to weld and cut f '.

More specifically, as shown in FIG.
5, the upper and lower fluid pressure cylinders 11, 12 are extended by the cylinder rods 16, 18, so that the upper body 1
7 and the lower body 19 are guided from the projections 21 and 21 of the guide plates 20 and 20 provided on both side surfaces of the frame 15 so that the upper body 17 descends from the standby position,
Rises. Normally, a lower seal holder 32, which is a lower body 19 and a lower seal base 9 provided thereon,
The lifting stop positions of the lower film holder 32 and the lower film holders 34, 34 are adjusted so as to be at the stroke end of the lower fluid pressure cylinder 12, and the lifting is stopped at an appropriate predetermined position with respect to the laminate M (see FIG. 3).

The upper body 17 is further lowered from the position shown in FIG. 3, and the upper seal holders 25, 25 and the upper film holders 28, which are the upper seal base 8 provided below the upper body 17, are also lowered. As shown in FIG. 4, the upper film f and the lower film f 'are connected to the lower surfaces of the upper film holders 28, 28 of the upper seal base 8 and the upper surfaces of the lower film holders 34, 34 of the lower seal base 9. Sandwiched between. Then, the proximity switch 51 as the first position detector attached to the side surface of the frame 15 shown in FIGS. 1 and 2 detects the lower end portion of the bracket 54, and the upper film presses 28 reach the predetermined position. Then, a detection signal is output which detects the fact.

Subsequently, as shown in FIG.
Lower seal base 9 and lower seal holder 9
Nichrome wires 33 on the upper surface of the lower seal holder 32
When the upper seal base 8 is lowered to a position where the upper seal f contacts the upper film f via the lower film f ', the upper film retainers 28, 28 are displaced upward with respect to the upper seal retainers 25, 25, and the lever 53 , 53 are pushed up against the force of a tension spring 57 and the pins 58
, And one end of each of the levers 53, 53 comes into contact with the detection unit of the limit switches 52, 52 as the second position detector, and the limit switches 52, 52 output detection signals. The first position detector and the second position detector, namely, the proximity switch 51 and the limit switches 52, 52, first, the proximity switch 51 outputs a detection signal, and then, the limit switches 52, 52 output the detection signals. Thereby, it is confirmed that the upper seal base 8 and the lower seal base 9 are in an appropriate state. At this time, the force of the compression springs 30 is applied to the upper film retainers 28, 28, and the films f, f 'are pressed more firmly so as not to be displaced.

Further, the cylinder rod 16 of the upper fluid pressure cylinder 11 extends to the stroke end, and the films f, f 'are held by the upper and lower film holders 28, 28 and 34, 34 by the force of the compression springs 27, 27.
The film f, f 'is cut by the two rows of nichrome wires 33, 33 on the lower seal retainers 32, 32 by pressing between the upper and lower seal retainers 25, 25 and 32, 32.
6. Both sides of the position where... Act are welded. Nichrome wire 3
As shown in FIG. 12, the upper and lower seal stands 8 and 9
The standby switch 51 is energized at the same timing as the ascent and descent operations, and is shut off at the first reference position where the proximity switch 51 outputs a detection signal. The welding is performed by the residual temperature of the nichrome wires 33 after the power supply is cut off, and while the upper seal retainers 25 and 25 and the lower seal retainers 32 and 32 are being pressed, that is, the proximity switch 51 is pressed.
The welding is performed between the limit switch two position detectors of the detection signal appropriate timer setting time described above from the AND condition is satisfied in the 52, 52 (T ₇ in FIG. 12).
The nichrome wires 33, 33 are started by the detection release (OFF) signal of the proximity switch 51, and the upper and lower seal bases 8, 9 are started.
The temperature is always maintained at a certain level or more by energization (not shown) that ends at the same timing as the raising and lowering operations from the standby position.

A foreign matter such as a finger is mistaken and the upper seal base 8
And the lower seal base 9, the upper film holders 28, 28 and the upper seal holders 25, 25 of the upper seal base 8 do not go down to predetermined positions. Does not output detection signal. Then, the compression spring 3 is pressed by a foreign substance such as a pinched finger.
, The upper film retainers 28, 28 are displaced with respect to the upper seal retainers 25, 25, and the lower switch and the lower surface of the upper seal retainers 25, 25 approach each other at a position where the lower switch approaches the limit switch 52 as the second position detector. , 52 output detection signals. That is, while the first position detector 51 which should output the signal first does not output the signal, the second position detector 52 which outputs the signal later outputs the signal. As indicated by the broken line, the energization of the nichrome wires 33, 33 is cut off without performing the operation of the cutter moving means 45, which is the next step, and the upper and lower fluid pressure cylinders 11, which are moving means are immediately replaced. The twelve cylinder rods 16 and 18 are shortened and open between the upper seal base 8 and the lower seal base 9 to move the upper and lower seal bases 8 and 9 to the standby position. Until the detection signals are output from the limit switches 52, 52, only the force of the springs 30 acts on the fingers and the like between the foreign substances such as the fingers and the like, so that the influence on the fingers and the like is minimized.

If it is determined that the downward movement of the upper seal base 8 is normal, that is, if it is determined that nothing is sandwiched between the upper and lower seal bases 8 and 9, it is in an appropriate state as described above. The welding of the film is performed, and while the film is being welded, the proximity switch 51 and the limit switches 52, 52, which are the first and second position detectors, at the time when it is determined that the film is in the proper state. AND of two detection signal outputs
After an appropriate timer set time (T ₆ in FIG. 12) from the satisfaction of the condition, the cutter moving device 45 operates to cut the films f, f ′ with the cutters 36.

Until the cutter moving device 45 operates,
Since the cutters 36 do not protrude from the lower surfaces of the upper seal retainers 25, 25, they do not bite into the film. The operation of the cutter moving means 45 is described in FIGS.
As shown in FIG. 10, the cylinder rod 44 of the fluid pressure cylinder 43 extends, and the cutter mounting plate 37
The cutter mounting plate 37 is inserted into the wavy groove 46 of the groove cam 41.
Move along the same trajectory as the bearings 40, 40 supporting.

At this time, the plurality of cutters 36...
It moves in one direction in the width direction of the film along the same locus as 6,
As shown in FIG. 9, the upper and lower film retainers 28, 28,
Films f, f 'held down by 34, 34
The cutter 36 is operated so as to reciprocate in a direction perpendicular to the surface of the film f, f ', for example, by sawing, as shown in FIG.
6 Use the entire blade surface evenly with the cutter 36
... cuts the films f and f 'in the width direction. In this case, the movement of the cutter mounting plate 37 is
The film f,
f ′ is cut.

The direction of movement of the cutters 36 is 1
The rearmost cutter 36 is mounted at a position where the cutting edge protrudes outside the film f, f 'at a distance greater than the width of the film f, f'. Further, an appropriate number of fluid pressure cylinders 43 for moving the cutter mounting plate 37 are mounted as needed.

After the films f and f 'have been cut, the timer setting time T ₇ , T ₇ , T ₈ slightly shorter appropriate timer setting time than after (T ₉ in FIG. 12), shortening the cylinder rod 44 of the hydraulic cylinder 43 of the cutter moving means 45, then the timer set time T _7,
The upper seal block 8, 9 and laminates compression means D of the hold-down device 13 is moved to the standby position after T _8. Further subsequently, as described above, after the timer set time T _10, the rear conveyor 2 is driven, packaged laminate M is discharged from the film packaging machine.

The operation command of each section based on the detection of each detector described above is controlled by control means (not shown) using a conventionally known technique.

[0049]

As described above, claim 1
In the invention described in the above, the film welding / cutting device is configured to move the cutter means in the width direction of the film while reciprocating the cutter means in a direction perpendicular to the film surface by the cutter moving means. The film can be cut using the entire blade surface evenly, extending the life of the cutter, and thus reducing the frequency of cutter replacement.

According to the second aspect of the present invention, the film to be welded and cut is firmly held by the contact of the first and second film holders, so that the film does not shift. According to the third aspect of the present invention, first and second position detectors for detecting a normal state when the first and second seal bases contact each other are provided, and the detection signal of the first position detector and the second position detector are provided. Since the cutter operation is performed after the detection signals of the position detector are sequentially output, for example, foreign substances such as fingers may be erroneously removed from the first position.
When the sensor is sandwiched between the second seal bases, the detection signal of the second position detector is output without outputting the detection signal of the first position detector. It can be performed quickly, the cutter can be deactivated and the upper and lower seal bases can be quickly opened. Also, only the force of the spring acts on the fingers, etc. until the detection of the second position detector. It is possible to provide a device which can be avoided and has excellent safety. Further, in the invention according to claim 4,
By mounting the cut-out cutter in one direction so that the blades are parallel, the number of components is reduced, and a device that is easy to maintain can be provided.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing details of a mounting portion of first and second position detectors.

FIG. 3 is a sectional view taken along line XX of FIG. 1 showing the operation sequence of the present invention.

FIG. 4 is a sectional view taken along line XX of FIG. 1 showing the operation sequence of the present invention.

FIG. 5 is a sectional view taken along line XX of FIG. 1 showing an operation sequence of the present invention.

FIG. 6 is a sectional view taken along the line XX of FIG. 1 showing the operation sequence of the present invention.

FIG. 7 is a sectional view taken along the line YY in FIG. 1;

FIG. 8 is a front view showing the operation of the cutter of the present invention.

FIG. 9 is a front view showing the operation of the cutter of the present invention.

FIG. 10 is a front view showing the operation of the cutter of the present invention.

FIG. 11 is a structural explanatory view showing the whole of the apparatus of the present invention.

FIG. 12 is a time chart showing the operation timing of each part of the device of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... front conveyor, 2 ... rear conveyor, 3 ... upper film roll, 4 ... lower film roll, 5 ... guide roller, 6 ... dancer roller, 7 ... film feed roller, 8 ... 1st seal stand (upper seal stand) , 9 ... second seal stand (lower seal stand), 10 ... cylinder rod, 1
DESCRIPTION OF SYMBOLS 1 ... Moving means (upper fluid pressure cylinder), 12 ... Moving means (lower fluid pressure cylinder), 13 ... Holding means, 14
... fluid pressure cylinder, 15 ... frame, 16 ... cylinder rod, 17 ... upper body, 18 ... cylinder rod,
19: Lower body, 20: Guide plate, 21: Convex part, 22:
Guide groove portion, 23: Guide groove portion, 24: Through shaft, 25:
First seal retainer (upper seal retainer), 26 ... bracket, 27 ... compression spring, 28 ... first film retainer (upper film retainer), 28a ... stepped groove, 2
9 ... pin, 30 ... compression spring, 31 ... holding bracket,
32 ... second seal holder (lower seal holder), 33 ...
Nichrome wire, 34: second film holder (lower film holder), 35: nut, 36: cutter, 37: cutter mounting plate, 38: support plate, 39: support shaft, 40: bearing, 41: groove cam, 42 ... Cutter means, 43 ...
Fluid pressure cylinder, 44: cylinder rod, 45: cutter moving means, 46: wavy groove, 50: position detector,
51: first position detector (proximity switch), 52: second position detector (limit switch), 53: lever, 54 ...
Bracket, 55: Bracket, 56: Support bracket, 57: Tension spring, 58: Pin, 60: Film roll drive roller, A: Laminate feeder, B: Film feeder, C: Film welding / cutting device, D: Laminate compression device, F ... film curtain, f, f '... film,
M: laminate.

Claims (4)

[Claims] 1. A first seal base and a second seal base are provided to face each other, and both seal bases are moved in opposing directions by a moving means, and a plurality of continuous films are overlapped and sandwiched at a predetermined position. In a film packaging machine that welds and cuts in a direction, a pair of first seal retainers provided on a first seal table so as to be spaced apart from each other in a feed direction of the film packaging machine, and each of the pair of first seal retainers is opposed to each other. A pair of second seal holders provided on the second seal base, cutter means provided between the pair of first seal holders, and width of the film while reciprocating the cutter means in a direction perpendicular to the film surface. And a cutter moving means provided so as to be able to move in a direction. 2. A first seal base and a second seal base are provided so as to face each other, and both seal bases are moved in opposite directions by a moving means, and a plurality of continuous films are overlapped and sandwiched at a predetermined position, and a width of the film is set. In a film packaging machine that welds and cuts in a direction, a pair of first seal retainers provided on a first seal table so as to be spaced apart from each other in a feed direction of the film packaging machine, and a pair of first seal retainers are provided on the outside. A pair of first film holders provided, a pair of second seal holders provided on the second seal base in opposition to each of the pair of first seal holders, and a pair of first film holders in opposition to each of the pair of first film holders A pair of second film retainers provided on the outside of each of the second seal retainers, a cutter provided between the pair of first seal retainers, and a cutter directly attached to the film surface. A film welding / cutting device comprising: a cutter moving means provided so as to be able to move in the width direction of the film while reciprocating in the angular direction. 3. A first seal base and a second seal base are provided so as to face each other, and both seal bases are moved in opposite directions by a moving means, and a plurality of continuous films are overlapped and sandwiched at a predetermined position. In a film packaging machine that welds and cuts in a direction, a pair of first seal retainers provided on a first seal table so as to be spaced apart from each other in the feed direction of the film packaging machine, and a pair of first seal retainers are provided on the outside of each of the pair of first seal retainers. A pair of first film retainers, each of which has a distal end projecting from the distal end of the first seal retainer to form a step and to be displaceable with respect to the first seal retainer so as to eliminate the step; and a pair of first seal retainers. And a pair of second seal holders provided on the second seal base in opposition to each other, and a pair of second seal holders opposed to each of the pair of first film holders. A pair of second film retainers provided on the sides, a cutter means provided between the pair of first seal retainers, and moving the cutter means in the width direction of the film while reciprocating in a direction perpendicular to the film surface. Cutter moving means provided so as to be able to perform the operation, a first position detector for detecting that the pair of first film retainers has reached the predetermined position, and a first film retainer having a predetermined position with respect to the first seal retainer. The second to detect that the displacement state has been reached
A position detector is provided, and when the detection signal of the second position detector is output without the detection signal of the first position detector being output, the cutter moving means is deactivated, and the first seal table and the A film welding / cutting device, characterized in that it is controlled to open between two seal stands. 4. A cutter means, wherein a plurality of cut-out cutters are provided with their tips opposed to the film surface and the blades are made substantially parallel and arranged at appropriate intervals in the width direction of the film. 2. The apparatus according to claim 1, wherein the cutter means is provided so as to be movable in the width direction of the film by at least the same distance as the largest of the appropriate intervals.
A film welding / cutting device according to claim 2 or claim 3.