JP5625337B2 - Film feeding apparatus and packaging apparatus provided with the apparatus - Google Patents

Description

  The present invention relates to a film feed apparatus provided in a packaging apparatus that draws a film from a film roll and wraps an article to be packaged with a film cut to a predetermined length.

  As a packaging device that pulls out a film from a film roll and wraps the package with the pulled film, for example, stretches and holds the film, pushes up the package from below the film, and covers the peripheral surface of the package with the film In addition, the packaged object is put into a push-up type packaging device that folds the end of the film to the bottom side of the packaged object, or a deep-drawn container, the film is covered on the upper surface of the container, and the film is heated on the upper edge of the container. There exists a heat seal packaging apparatus for welding, a heat seal packaging apparatus for placing an object to be packaged on a base material, covering the film thereon, and heat-sealing the periphery of the film to the upper surface of the base material.

  The film feed device equipped in the various packaging devices described above is a film in which the film front end connected to the film roll set in the roll placement unit is caused to wait on the film standby unit, and the film front end waiting on the standby unit is reciprocated within a predetermined range. The film is pulled out by being gripped by the holding portion, and the drawn film is cut by a cutter in the vicinity of the film standby portion, and the cut film having a predetermined length is used for packaging (see, for example, Patent Document 1).

  The cutting of the film gripped and pulled out by the film clamping unit is performed by inserting a cutter into the surface of the film held and stretched by the film clamping unit at a substantially right angle and cutting. That is, since the cutter is put in a state in which the film drawn from the film roll is spread in the air, there arises a problem that the film is poorly cut.

  As a solution to this problem, it is conceivable that the cutter guide that supports the film when the cutter is operated is disposed directly below the film corresponding to the cutter. In this case, the cutter guide moves the film holding portion that grips the film tip. Since the cutter guide is positioned on the line and the cutter guide obstructs the movement of the film clamping portion and the film cannot be gripped, the cutter guide cannot be disposed at the position.

  Also, as described above, when the film is badly cut, when the cutter cuts the film and returns to the initial position, a part of the film adheres to the cutter and is pulled up together, and the leading end of the cut film There is a problem that a part of the film rolls upward on the film standby part and the gripping operation (clamping) by the film clamping part is not performed correctly.

JP 2005-119711 A

  The present invention has been made in view of the above problems, and in a film feed apparatus that pulls out a film by grasping the leading edge of the film waiting in the film standby section with the film holding section, the drawn film can be correctly cut, and the film It is an object of the present invention to provide a film feed device that does not hinder the movement of the clamping part (film gripping operation) and a packaging device including the device.

In order to achieve the above object, the film feed apparatus of the present invention comprises a film standby unit for standby holding the film leading end drawn from the film roll, and a film clamping unit for grasping the film leading end waiting for the film standby unit and pulling out the film. In the film feed apparatus provided with a cutter for cutting the film drawn out by the film clamping unit on the downstream side in the film transport direction from the film standby unit, the cutter is arranged to be movable up and down with respect to the film drawn out by the film clamping unit And a cutter guide provided with a film receiving portion for supporting a position in the vicinity of a position where the cutter hits the film when the cutter is operated to cut the film, and the cutter guide is provided with the cutter. The first position to support the film when operating If, when the film nipping portion moves toward the film standby section, into a second position which does not inhibit the film nipping operation, Ri freely varies der position, and the cutter guide is swingably It is supported, moved to the second position by contact due to the movement of the film clamping part, and returned from the second position to the first position by releasing the contact of the film clamping part. 1).

The film clamping unit clamps the film tip supported on the film standby unit for each film clamping unit, and pulls out the film by gripping only the film leading end by retreating the film clamping unit.
The cutter guide has a first position that supports the position near the cutting position of the film when the cutter is operated, and a second position that does not hinder the film clamping operation when the film clamping unit moves toward the film standby unit. In addition, it is sufficient if the position can be varied, and the form may be any of a swinging (turning) type, a horizontal slide type, and a vertical slide type.
The positions of the cutter and the cutter guide only need to be opposed to each other with the film drawn out by the film clamping unit interposed therebetween, and may be the cutter on the upper side and the cutter guide on the lower side, or vice versa. The movement from the first position to the second position may be performed by driving a motor or the like.

  According to the above means, when the film clamping unit moves toward the film standby unit, the cutter guide is retracted to the second position that does not hinder the clamping operation (advance) of the film clamping unit. The operation of gripping the film tip supported on the part is not prevented. In addition, when the cutter is activated and cuts the film, the cutter guide is located at the first position that supports the position near the cutting position of the film that is gripped and pulled out by the film clamping part, so the film is cut correctly with the cutter. Is done.

How to restore the previous SL cutter guide in the first position from the second position, the method according to the elastic member such as a coil spring, or a method such as by air cylinders, today, it is possible to use various methods have been employed .

  According to the above means, when the film clamping unit advances toward the film standby unit, the film clamping unit comes into contact with the cutter guide located at the first position, but the cutter guide falls by contact with the film clamping unit. Since the film is moved to the second position that does not hinder the movement of the film sandwiching portion, the film can be pulled out by grasping the leading end of the film regardless of the cutter guide. Also, when the film clamping part grabs the film tip and moves backward and moves away from the cutter guide, the pressing force that has tilted the cutter guide is released, so the cutter guide automatically returns to the first position (initial position). Then, it waits to cope with the lowering operation of the cutter.

Further, the film receiving portion of the cutter guide adheres and holds the cut end portion on the film roll side, and the end portion of the film is folded to the back side of the film standby portion by moving to the second position. Good (Claim 2 ). In this case, the second position is a position below the film standby portion, and the cutter guide may be a swing (rotation) type or a horizontal slide type.
The form in which the film receiving part adheres and holds the cut end on the film roll side is a system that utilizes the self-adhesiveness of the film itself, or a system that applies an easily peelable adhesive that holds and holds the film. A suction method using air pressure (negative pressure) may be used. As a specific example, a horizontal piece projecting toward the film standby portion is provided on the film receiving portion of the cutter guide near the film standby portion. Then, a surface treatment is performed to easily attach the film to the horizontal piece (Claim 3 ). Examples of the surface treatment include making the surface of the horizontal piece a mirror surface (smooth surface) or applying an easily peelable adhesive in order to stabilize the adhesion due to self-adhesiveness of the film.

  According to the above means, when the film holding part is drawn and stretched with a cutter, the film receiving part of the cutter guide that supports the film has adhesiveness, so when the film is cut, the film roll side is cut. The end is attached and held on the film receiver. Then, when the film clamping part moves toward the film standby part for the next packaging, the cutter guide that adheres and holds the cut end of the film is contacted by the movement of the film clamping part or the power of the air cylinder or the like It is moved below the standby unit. As a result, the leading end of the film attached to the film receiving portion of the cutter guide comes into the back side from the leading end of the film standby portion. Therefore, the cut end on the film roll side does not squeeze on the film standby part, and it is surely folded or drooped along the back side from the front end of the film standby part. The gripping operation is surely performed.

The film feed device having the above structure, according to claim 4 in which it can be equipped for various film packaging device).
The packaging device stretches and holds the film, pushes up the package from the lower side of the film, covers the peripheral surface of the package with the film, and folds the end of the film to the bottom side of the package. Put a package in an apparatus or deep-drawn container, cover the film on the top surface of the container, heat-seal packaging device that heat-welds the film on the upper edge of the container, or place the package on the base material Any of a heat seal wrapping apparatus and the like that covers a film thereon and thermally welds the periphery of the film to the upper surface of the base material may be used.

  According to the above means, it is possible to always stably pull out and cut the film from the film roll, and it is possible to provide a packaging apparatus capable of stably performing beautiful packaging.

According to the film feeding apparatus of the present invention, when the film clamping unit moves toward the film standby unit, the cutter guide is retracted to the second position that does not hinder the clamping operation (advance) of the film clamping unit. Therefore, the operation of the film clamping unit to grip the film tip supported on the film standby unit is not prevented. In addition, when the cutter is activated and cuts the film, the cutter guide is located at the first position that supports the position near the cutting position of the film that is gripped and pulled out by the film clamping part, so the film is cut correctly with the cutter. Is done.
Further, when the full Irumu clamping portion is advanced toward the film standby section, the film nipping portion is in contact with the cutter guide located in the first position, the cutter guide is collapsed in contact with the film nipping portion, the film nipping Since it moves to the second position that does not hinder the movement of the part, it becomes possible to pull out the film by grasping the leading end of the film regardless of the cutter guide.

Moreover, when the film is cut | disconnected by the structure of Claims 2 and 3 , the cut edge part by the side of a film roll adheres and is hold | maintained at a film receiving part. Then, when the film clamping unit moves toward the film standby unit for the next packaging, the cutter guide that adheres and holds the cut end portion of the film is rotated below the film standby unit by contact due to the movement of the film clamping unit. The film tip attached to the film receiving portion of the cutter guide is wound from the tip of the film standby portion to the back side. Therefore, the cut end on the film roll side does not roll up on the film standby part, and it surely hangs down from the front end of the film standby part along the back side, so that the film clamping part can grasp the film front end. Surely done.
Further, according to the configuration of the fourth aspect, it is possible to always stably pull out and cut the film from the film roll, and it is possible to provide a packaging device capable of stably performing beautiful packaging.

The perspective view which shows an example of the packaging apparatus provided with an example of the film feed apparatus which concerns on this invention. The perspective view which cuts and shows a part. The front view. The same part notch top view. The movement means of a base material mounting part is shown, (a) shows the state of an initial position (lower limit position), (b) shows the state in the middle of the raising of a base material mounting part. The perspective view which shows the structure of a suction means and a heater part. In the bottom view, (a) shows a state where the partition wall is set at the first position, and (b) shows a state where the partition wall is moved to the second position. The longitudinal cross-sectional view of the state which attracted and held the film with the suction means. The same sectional drawing of the state which raises a base material mounting part and makes it contact | abut to the film hold | maintained by adsorption | suction, and is heat-sealed (thermal welding). The same sectional view in the state where the base material placing part was lowered after heat sealing. The cutter part which cut | disconnects a film is shown, (a) is a top view, (b) is a longitudinal cross-sectional view. Opening and closing operations are shown in the film clamping unit of the film feeding device, (a) is a state in which the movable lower plate is opened, (b) is a state in which the film tip is attached by closing the fixed upper plate and the movable lower plate, (c) Is the state of pulling out the film. Explanatory drawing which shows the releasing mechanism of a film clamping part. The structure of a cutter guide is shown, (a) is a figure which shows the state just before a film clamping part contact | abuts the cutter guide located in a 1st position, (b) is a contact pressure by a cutter guide by the movement of a film clamping part. The state figure tilted and tilted to the second position. Explanatory drawing which shows the other example of a cutter guide.

Hereinafter, an example of an embodiment of the present invention will be described based on the drawings with respect to a heat seal packaging apparatus provided with an automatic film feeding apparatus.
The heat seal packaging apparatus A shown in FIGS. 1 to 3 places an article W to be packaged on a flat base material, covers the article W with a stretch film, and covers the outer edge of the film W from the article W. An electric drive type heat seal packaging apparatus is shown that heat seals and wraps on the surface of a base material to pull out a film to be wrapped on a package W and perform up / down movement of sealing processing by motor drive.
In the heat seal packaging apparatus A, a base material placing part 2 is supported on a base 1 so as to be vertically movable by a moving means 3, and is placed on the base material placing part 2 at a position above the base material placing part 2. A film roll disposing unit 4 for supplying a film to be wrapped on the article W to be packaged on the base material 9 raised and a film feed device B for drawing a film 5a from the film roll 5 of the film roll disposing unit 4 for a predetermined length; , A suction means 7 for horizontally stretching and holding the film 5a pulled out by the film feed device B above the base material placing portion 2, and an edge of the film 5a covering the article W to be packaged by the raising of the base material placing portion 2 A heater portion 8 for heat-welding to the surface of the base material is arranged.

  The base material placing part 2 is a rectangular frame shape in plan view using a metal material so that the base material 9 and the article W to be packaged are raised and have a strength that does not deform even when pressed against the heater part 8 positioned above. It is configured. The rectangular frame has a predetermined vertical position (for example, a position in the vertical direction 2/3) so as to correspond to two types of base materials having different sizes (the horizontal dimensions are the same and the vertical dimensions are different). ), For example, an auxiliary bar 10 having a surface provided with a heat-resistant member such as silicon rubber is provided. In addition, the upper surface of the base material mounting portion 2 is not limited to the frame shape, and for example, the entire upper surface may be covered with a flat plate.

The base material placing part 2 has a shaft 11 penetrating in the width direction at a substantially central position in the longitudinal direction (film drawing direction) of the base material placing part 2, and both projecting portions of the shaft 11. One end of each of the mounting plates 12 and 12 'is connected to each other, and the other ends of the mounting plates 12 and 12' are fixed to the upper portions of the support frames 13 and 13 'standing and fixed on the base 1 by shafts 14 and 14'. It is supported so as to be pivotable.
Further, toothed pulleys 15 and 15 'are rotatably attached to protruding portions on both sides of the shaft 11 that penetrate the base material placing portion 2, and toothed pulleys 16 and 16' are attached to the shafts 14 and 14 '. The toothed belts 17 and 17 'are wound around the toothed pulley 15 and the toothed pulley 16, and the toothed pulley 15' and the toothed pulley 16 '.

  The moving means 3 for vertically swinging the base material placing part 2 suspended and supported on the support frames 13 and 13 ′ by the shafts 14 and 14 ′ via the mounting plates 12 and 12 ′ is installed on the base 1 The motor 18, the rotating plate 19 driven and rotated by the motor 18, the operating arm 20 connected and fixed to the central shaft 19 ′ of the rotating plate 19, the end of the operating arm 20, and the mounting plates 12, 12. The connecting rod 21 connects the protruding arms 12a and 12'a. And the said structure is provided in the both sides so that the said moving means 3 can rock | fluctuate simultaneously the mounting plates 12 and 12 'attached to the width direction both sides of the base material mounting part 2. FIG.

  With the above configuration, as shown in FIG. 5, when the motor 18 of the moving means 3 is driven and rotated, the operating arm 20 rotates about the central axis 19 ′ via the rotating plate 19, and the connecting rod 21 is swung. The The attachment plates 12 and 12 ′ are rotated about the shafts 14 and 14 ′ by swinging the connecting rod 21. Since the toothed pulleys 16 and 16 ′ are fixed to the shafts 14 and 14 ′ when the mounting plates 12 and 12 ′ are rotated, the toothed pulleys 16 and 16 are rotated together with the rotation of the mounting plates 12 and 12 ′. 'Is also rotated. Since the rotation of the toothed pulleys 16 and 16 'rotates the toothed pulleys 15 and 15' via the toothed belts 17 and 17 ', the rotation of the mounting plates 12 and 12' and the toothed pulleys 15 and 15 ' By rotating 15 ', the base material placing part 2 is raised in the horizontal state at the lower limit position.

The support frames 13 and 13 'are notched and formed with a locking groove 22 for hooking and supporting the shaft 11 that is horizontally mounted over the mounting plates 12 and 12' at the lower limit position of the base material placing portion 2. ing.
The locking groove 22 is formed in an arc shape from the center position in the width direction of the support frames 13 and 13 ′ along the swinging direction of the base material placing portion 2.

  The film roll arrangement part 4 includes support frames 13 and 13 ′ that are erected and fixed on the base 1, and support columns 23 that are erected and fixed at substantially the same interval and height as the attachment intervals of the support frames 13 and 13 ′. , 23 ′, and a film feed device B that pulls out the film 5 a from the film roll 5 set in the film roll disposing unit 4 below the film roll disposing unit 4. A suction means 7 for horizontally stretching and holding the film 5a pulled out by the film feeding device B, and a heater section 8 for thermally welding the base material 9 abutted on the film by raising the base material placing section 2 are installed. ing.

  The film roll placement unit 4 rotatably mounts a rotating roller 27 on two supports 26 and 26 ′ installed at a predetermined interval between a pair of side plates 25 erected and fixed on the cradle 24. And it is comprised so that the film roll 5 may be mounted so that rolling is possible. In addition, the support structure of the film roll 5 in the film roll arrangement | positioning part 4 is not restricted to the support structure by the rotating roller 27 of illustration, The general support structure supported through a shaft in the center hole of the film roll 5 may be sufficient.

Further, a shaft 28 is provided between the side plates 25 so as to be positioned below the film roll arrangement portion 4, and a guide roller 29 for guiding the film 5 a connected to the film roll 5 in the pulling direction is electromagnetically attached to the shaft 28. It is attached via a clutch (not shown). That is, when the film clamping unit 36 of the film feeding apparatus B described later grips the film and feeds the film, the guide roller 29 and the electromagnetic clutch are separated (OFF), the guide roller 29 rotates, and the film is fed. Further, when the film clamping unit 36 proceeds to grip the standby film, the electromagnetic clutch is turned on and the guide roller 29 does not rotate.
Further, as shown in FIG. 4, toothed pulleys 31 and 32 are fixed to the shaft end of a shaft 30 rotatably mounted on the shaft end of the shaft 28 and the opposite end of the cradle 24, respectively. The toothed belt 33 is wound around the toothed pulleys 31 and 32 and a driving pulley attached to the rotating shaft of a film feed motor (for example, a stepping motor) 37c of the film feed device B, and the toothed belt 33 The shaft 28 is rotated by the rotation of the belt 33. Further, toothed pulleys 31 ′ and 32 ′ are fixed to opposite ends of the shaft 28 and the shaft 30, and a toothed belt 33 ′ is wound thereon. Incidentally, a film clamping unit 36 of a film feed device B described later is connected to the toothed belts 33 and 33 ′, and the film clamping unit 36 reciprocates by forward and reverse rotation of the toothed belts 33 and 33 ′. ing.

Further, an intermediate guide roller 35 is rotatably supported by a shaft 35 'across the side plate 25 between the guide roller 29 and the film roll arrangement portion 4, and the tip of the film 5a is supported on the shaft 35'. A guide plate 34 that is wound around the circumferential surface of the guide roller 29 and protrudes forward from the lower surface of the guide roller to be in an initial set state is rotatably attached.
The guide plate 34 is formed in a substantially L-shaped side surface, and the horizontal piece 34a bent at a substantially right angle enters the lower side of the guide roller 29 by the rotation of the guide plate 34, and the tip of the horizontal piece 34a is It is configured to protrude horizontally forward from the guide roller 29. And the film standby part 38 of the film feed apparatus B is formed in this horizontal piece 34a.

  The film standby section 38 is configured such that a film support plate 38 ′ made of an elastic member is protruded horizontally on the upper surface of the horizontal piece 34 a with the tip side facing forward from the horizontal piece 34 a. Thereby, the front end side of the film support plate 38 ′ protruding from the horizontal piece 34 a of the guide plate 34 is freely bent in the vertical direction, so that the film front end is securely held by the film holding portion 36 of the film feed apparatus B. That is, the guide plate 34 sets the leading end of the film connected to the film roll 5 in the initial setting state, and at the same time, after the setting, supports the leading end of the film from below so that the film clamping unit 36 can stably adhere.

  As shown in FIG. 12, the film clamping unit 36 has a movable lower plate 36b pivotally supported by a shaft 36c on the lower side of the fixed upper plate 36a, and a fixed upper plate 36a at a rear position from the shaft 36c. The spring 36d is elastically mounted over the movable lower plate 36b. Thereby, the front end side of the movable lower plate 36b is pressed against the lower surface of the fixed upper plate 36a so that the film 5a can be attached. In addition, an elastic body (for example, urethane foam) may be bonded and fixed to the upper surface of the movable lower plate 36b so that the film can be securely attached by the fixed upper plate 36a and the movable lower plate 36b. In that case, the elastic body may be attached over the entire width in the width direction of the movable lower plate 36b so that the entire width in the width direction of the film 5a can be attached.

Further, a guide roller for forcibly opening the movable lower plate 36b closed by the resilient force of the spring 36d on the side surface of the movable lower plate 36b on the front end side (the side on which the film front end is attached). 36e is attached. A guide inclined plate 39 for guiding the guide roller 36e downward with respect to the horizontal line is disposed on the side surface of the side plate 25 where the vicinity of the tip of the film support plate 38 'is located.
The guide inclined plate 39 is movable so that the film clamping part 36 moves forward along the lower surfaces of the suction means 7 and the heater part 8 so as to clamp the tip of the film 5a, and is closed at a position immediately before the end of the forward movement. The lower plate 36b is forcibly opened against the spring force of the spring 36d, and is directed forward and downward to a horizontal line forward position on a line through which a guide roller 36e attached to the outer surface of the closed movable lower plate 36b passes. When the guide roller 36e comes into contact with the guide inclined plate 39 and continues to move forward, the leading end side (side on which the film is attached) of the movable lower plate 36b is moved downward about the shaft 36c. The film 5a and the fixed upper plate 36a located on the upper side of the film support plate 38 'are closed by the elastic force of the spring 36d after passing through the guide inclined plate 39, located below the film support plate 38'. To 挾着 the tip portion of Irumu support plate 38 '(see FIG. 12 (a), (b)).
As shown in FIG. 12C, the guide inclined plate 39 is fixed in the inclined state in the direction in which the guide roller 36e abuts forward, and the guide roller 36e is guided along the lower surface of the guide inclined plate 39. After passing (after attaching the leading edge of the film), when the film sandwiching portion 36 switches back (retreats) and passes the upper surface side of the guide inclined plate 39, the inclined plate 39 does not hinder the movement of the guide roller 36e. Of the tension coil spring so that the inclined guide inclined plate 39 returns to the initial state (inclined state in which the guide roller 36e is guided downward in the traveling direction) after passing through the guide roller 36e. It is pulled by the spring 39a.

As shown in FIGS. 3 and 4, the drive unit 37 that reciprocates the film clamping unit 36 includes guide shafts 37 a and 37 ′ a that are arranged from the front end to the rear end on the left and right side surfaces of the cradle 24, and its guide. The sliding bodies 37b and 37'b slidably attached to the shafts 37a and 37'a, the toothed belts 33 and 33 'rotatably arranged on the outside of the receiving base 24, and the toothed belt 33 are provided. The sliding body 37b, 37'b is connected to the lower side (return path side) of the toothed belts 33, 33 '. Then, both side portions of the fixed upper plate 36a of the film sandwiching portion 36 are connected and fixed to the lower surfaces of the left and right sliding bodies 37b and 37'b.
Accordingly, the film feed motor 37c (for example, a stepping motor) is driven to rotate, whereby the toothed belts 33 and 33 ′ are rotated, and the sliding bodies 37b and 37 ′ are rotated by the rotation of the toothed belts 33 and 33 ′. b slides along the guide shafts 37a and 37′a, and the film clamping portion 36 connected to the slide bodies 37b and 37′b also slides. When the forward movement (advance), the film clamping part 36 opens and closes the leading edge of the film 5a. When the backward movement (reverse movement), the film clamping part 36 moves backward while holding the distal end of the film 5a. It is possible to draw out an amount (length) of film necessary for the film.

The leading end side of the film 5a pulled out by the operation of the driving unit 37 by the film clamping unit 36 of the film feeding apparatus B is still held by the film clamping unit 36. In order to thermally weld the film 5a to the base material 9 and take out the packaged product, it is necessary to release the sticking by the film clamping unit 36. The release mechanism 40 is arranged on the toothed belt 33 ′ side.
As shown in FIG. 13, the release mechanism 40 includes a roller 40a attached to the tip side opposite to the side where the guide roller 36e is attached to the movable lower plate 36b of the film sandwiching portion 36, and the roller 40a through the roller 40a. An operating plate 40b that opens the movable lower plate 36b downward, an electromagnetic solenoid 40c that is a power source that moves the operating plate 40b up and down, an initial position sensor 40d that controls ON / OFF of the electromagnetic solenoid 40c, and an end point position sensor 40e , And a flag 40f provided on the sliding body 37′b.
The actuating plate 40b is a strip having a substantially L-shaped cross section, and one end in the longitudinal direction thereof is pivotally supported on the side plate 25 'so as to be vertically rotatable by a shaft 41, and the other end of the actuating plate 40b is a plunger of an electromagnetic solenoid 40c. It is connected to.

  The position for operating the electromagnetic solenoid 40c is determined by the installation positions of the initial position sensor 40d and the end position sensor 40e. The initial position sensor 40d is located near the film support plate 34, and the end position sensor is located near the film drawing end point. 40e is arranged. As a result, after the film feed is completed (when the partition wall 42 'is positioned at a second position described later), that is, the film clamping unit 36 moves backward by clamping the leading edge of the film and pulls out the longest set film. After that, the flag 40f provided on the sliding body 37′b blocks the end point position sensor 40e, so that the electromagnetic solenoid 40c is operated, and the plunger is drawn to rotate the operating plate 40b downward. The rotation of the operating plate 40b opens the movable lower plate 36b via the roller 40a, and the film sticking is released. When the partition wall 42 'is positioned at a first position described later, the film is not fed to the end point position sensor 40e, and at the first position, the film is fed with a predetermined number of pulses from the initial position sensor 40d. Since the process ends, a sensor for detecting the end is provided in the same manner as the end point position sensor 40e, and the electromagnetic solenoid 40c can be operated by the detection of the sensor to release the film sticking. Alternatively, at the first position, the electromagnetic solenoid 40c may be driven after the film feed motor is driven for a predetermined number of pulses from the initial position sensor 40d. Further, a switch for operating the electromagnetic solenoid 40c in any case of the first position and the second position may be provided, and the film sticking by the film clamping unit 36 may be released by pressing the switch. .

The film 5 a having a predetermined length drawn by the operation of the film feeding device B is stretched and held in a substantially horizontal shape by the suction means 7.
As shown in FIG. 6, the suction means 7 includes a double box frame 41 formed by an outer box 42 and an inner box 43, and an electric fan 44 that generates a suction force in a space formed by the double box frame 41. It consists of and.
The outer box 42 constituting the double box frame 41 is a box having a rectangular shape in plan view, the upper surface and three of the four side walls are closed, and the lower surface and one side of the side walls are opened. The partition wall 42 ′ is movably disposed in an open portion of the partition wall 42 ′ while maintaining an airtight state.
Further, a fan mounting hole 45 is opened on the upper surface of the outer box 42, and an electric fan 44 is mounted in the fan mounting hole 45, and a negative pressure is generated in the double box frame 41 by the operation of the electric fan 44. Has been. It should be noted that the mounting position of the electric fan 44 on the upper surface of the outer box 42 is present in an area defined when the movable partition wall 42 ′ is positioned at the initial position (first heat welding area). To.

As shown in FIG. 7, the inner box 43 has box frames 43a and 43b in which three of the upper surface and four side walls are closed and one of the lower surface and the side walls is opened. They are fitted face to face and can be extended and contracted. The combined box frames 43a and 43b are fitted in the outer box 42, and one box frame 43a is maintained in a vertical direction while maintaining a certain distance (gap) from the three side walls of the outer box 42. It is supported movably. Further, the other box frame 43b is movable in the vertical direction while maintaining the same gap (gap) as the gap (gap) formed between the outer box 42 and the box frame 43a between the partition wall 42 '. Connected and supported.
The space (gap) defined by the side wall and partition wall 42 ′ of the outer box 42 and the side wall of the inner box 43 (box frames 43a and 43b) is determined by the suction part 7a of the suction means 7 that stretches and holds the film 5a. is there.
Further, the lower end surface of one box frame 43b constituting the inner box 43 is bent upward and outward to form a separating piece (separating means) 55. This separating piece (separating means) 55 lowers the film (heat-bonded to the base material) attached to the heater portion when it is projected downward from the lower end surface of the outer box 42 by a downward biasing force by an elastic member to be described later. It contributes to pressing down and releasing the film from the heater surface.
Since the box frame 43b of the inner box 43 and the partition wall 42 'are coupled with a certain distance (gap), and the heater section 8 is attached to the lower end of the partition wall 42', the partition Even if the wall 42 ′ is moved and the box frame 43 b slides and moves from the state of FIG. 7A to the state of FIG. 7B, the movable heater portion 8, the partition wall 42 ′ and the outer box 42 The suction portion 7a formed by the inner box 43 (box frames 43a and 43b) can move the position of the heater portion according to the size of the base material while maintaining the initial positional relationship.
FIG. 7A shows a case where “Small” is selected from among the base material types in the packaging file to be described later, and “1” is read as the information on the partition wall movement, and the partitioning is performed until the flag 51b blocks the sensor 51a. The wall 42 'has been moved (first position).
FIG. 7B shows the case where “Large” is selected among the base material types in the packaging file, and “2” is read out as the information on the partition wall movement, and the flag 51′b blocks the sensor 51′a. The partition wall 42 ′ has been moved to the second position (second position).

  As shown in FIG. 6, the mechanism for moving the partition wall 42 ′ along the drawing direction of the film 5 a includes a side wall in the outer box 42 along the drawing direction of the film 5 a and a fixed side plate 46 fixed to the open side wall side. Two ball screw mechanisms 47 are constructed over the span. Specifically, the screw shaft 47a is rotatably installed over the side wall of the outer box 42 and the fixed side plate 46, and a nut member 47b screwed to the screw shaft 47a is fixed to the partition wall 42 '. To synchronously rotate the screw shafts 47a of the two ball screw mechanisms 47, the toothed pulleys 48a and 48b are fixed to the end portions of the screw shafts 47a, and the rotation shafts of the drive motors 49 (for example, stepping motors) are fixed. The driving pulley 49a is fixed, and the toothed belt 50 is wound around the driving pulley 49a and the toothed pulleys 48a and 48b. Accordingly, when the driving motor 49 is driven, the two screw shafts 47a are rotated via the toothed belt 50, and the partition wall 42 ′ to which the nut member 47b is fixed is moved in the drawing direction of the film 5a. The adsorbing area (width in the film drawing direction) is adjusted to be wide or narrow.

  As shown in FIGS. 6 and 7, the movement control of the partition wall 42 ′ is configured by attaching a position detecting means 51 across the fixed side plate 46 and the partition wall 42 ′. Specifically, two sets of position detection sensors 51a and 51'a are attached to the fixed side plate 46, and two types of flags 51b and 51'b are attached to the moving partition wall 42 '. Accordingly, when the long flag 51b blocks the position detection sensor 51a, the partition wall 42 'is in the first position, and when the short flag 51'b blocks the position detection sensor 51'a, the partition wall 42' It is detected that it has been moved to the second position.

Further, the inner box 43 of the double box frame 41 constituting the suction means 7 is supported so as to be movable in the vertical direction with respect to the outer box 42. As shown in FIG. The brackets 52 are fixed to the side walls and the partition wall 42 ′, respectively, while the guide rods 53 are fixed upright on the upper surfaces of the box frames 43 a and 43 b constituting the inner box 43, and the guide rods 53 are fixed to the corresponding brackets 52. The guide rod 53 is inserted so as to be movable up and down, and a coil spring (elastic member) 54 is attached to the guide rod 53 so that a downward force acts on the box frames 43a and 43b. In the initial state (the state before the film 5a is sucked and held), the inner box 43 is slightly lower than the lower surface (the surface on which the film is thermally welded) of the heater portion where the lower end of the inner box 43 is attached to the lower end of the outer box 42. It is set so as to protrude downward (see FIG. 8), and when the base material is pressed against the film 5a by raising the base material mounting portion 2, the inner box 43 becomes substantially flush with the lower surface of the heater portion by the external force. When the external force is released by the lowering of the base material placing portion 2 when the heat sealing is completed, the initial position is obtained by the elastic force of the coil spring 54 (see FIG. 9). (See FIG. 10).
Further, a through hole 63 communicating with the inside of the outer box 42 is formed on the left and right side walls along the film width direction of the outer box 42 constituting the suction means 7, and covers the through hole 63 in an open state. 64 is attached to the outside of the outer box 42 to form an auxiliary suction part 65. The auxiliary suction portion 65 can reliably suck and hold the film by the function of the auxiliary suction portion 65 even when the film 5 a drawn from the film roll 5 is drawn out of the film in the width direction.

A heater portion 8 is formed outside the suction portion 7a of the suction means 7 so as to surround the suction portion 7a.
The heater portion 8 uses a resistance wire such as a nichrome wire, and is disposed at the lower end of the outer box 42 of the suction means 7 and the lower end of the partition wall 42 ′. In addition, the upper surface side (the side opposite to the surface in contact with the film) of the heater unit 8 is covered with a heat insulating material, and safety measures are taken so as to prevent burns or the like even if fingers are accidentally contacted.
The heater portion 8 is disposed on the lower outer surface of the outer box 42 and the lower outer surface of the partition wall 42 ′ so as to be heat-welded along the four sides of the substantially rectangular base material in plan view. When the heater part 8 corresponding to is divided independently, the corner part where the sides intersect is not thermally welded. In order to eliminate the non-welding of the corner portions, the end portions of the heater portions may be connected by a metal conductor 56 so that the corner portions are also thermally welded.

  A cutter 57 for cutting the film 5a drawn by the operation of the film feed device B is disposed between the guide roller 29 and the outer box 42 of the suction means 7 having the suction portion 7a and the heater portion 8. ing. A cutter guide 58 is disposed at a position facing the cutting edge of the cutter 57, that is, a position below the film 5a drawn out by the film clamping unit 36, and a position that supports the drawn film 5a substantially horizontally. (See FIG. 11).

  The cutter 57 cuts the film 5 a that is covered with the package W and is thermally welded to the periphery of the base material at a position in front of the film support plate 35. The cutter 57 is moved up and down by an electromagnetic solenoid 59. It has become.

The cutter guide 58 includes film receiving portions 58a and 58b for supporting upstream and downstream neighboring positions from below when the cutter 57 descends and cuts the film, with the position where the cutter 57 contacts the film 5a interposed therebetween. ing.
The distance between the film receiving portion 58a and the film receiving portion 58b is set to be slightly wider than the thickness of the cutter 57, thereby supporting the film 5a in a substantially straight state, ensuring the cutting of the film, and the cutting surface ( The end face is straight and clean.

The cutter guide 58 is supported on a side opposite to the film receiving portions 58a, 58b by a shaft 58c on a fixing member (not shown) such as a frame so as to be tiltable toward the film standby portion 38 side. When the cutter 57 is operated, the tilting range is the first position (X1) for supporting the drawn film 5a from below, and when the film clamping unit 36 moves toward the film standby unit 38, This is the second position (X2) that does not hinder the film clamping operation of the film clamping unit.
Further, the cutter guide 58 is tilted to the second position (X2) by the contact by the movement for moving the film by the film clamping unit 36 (advance = forward movement), and the film clamping unit 36 clamps the film. Thus, the spring 58d is urged so as to return from the second position to the first position (X1) by moving (retracting = returning). The spring 58d is moved back in the direction of the first position (X1) by the resilient force of the spring 58d, but a stopper 61 is provided so as to stop accurately at the first position (X1).

Further, the film receiving portions 58a and 58b may be the plate thickness (end surface) of the plate material forming the cutter guide 58, but the film receiving portion 58b supporting the upstream side (close to the film standby portion) from the cutter 57 is at the upper end. A horizontal piece portion 60 that protrudes substantially perpendicularly toward the film standby portion 38 is formed, and the surface of the horizontal piece portion 60 is subjected to a surface treatment on which the film 5a easily adheres.
The surface treatment may be any method such as a mirror surface treatment, a smooth surface treatment, or a method of applying an adhesive so as to adhere to the film receiving part due to the self-adhesiveness of the film itself used for packaging.

  With the above configuration, the end portion of the film 5a connected to the film roll among the end portions of the film cut by the lowering of the cutter 57 is attached to the surface of the film receiving portion 58b (see FIG. 14A). The cutter guide 58, which holds the leading end of the film 5a and is located at the first position (X1), moves toward the film standby unit 38 so that the film clamping unit 36 pulls out the film for the next packaging. As a result, the cutter guide 58 is brought into contact with the cutter guide 58, and the cutter guide 58 is tilted toward the film standby portion 38 side. As a result, the front end of the film 5a attached and held on the film receiving portion 58b of the cutter guide 58 is folded back to the back side at the front end of the film support plate 38 ', and is attached to the back side of the film support plate 38'. It will be in the state which hung down from the front-end | tip of board 38 '. Then, the film 5a that is folded back and attached to the back side of the front end of the film holding plate 38 'or hangs downward from the front end of the film supporting plate 38' is forcibly opened and advanced by the film holding portion 36 that moves forward. 'Is sandwiched (see FIG. 14B).

FIG. 15 shows a modification of the movement of the cutter guide 58. The cutter guide 58 is supported by a linear reciprocating mechanism such as an air cylinder 62 so as to be vertically movable in the vertical direction. As a result, the cutter guide 58 rises to the first position (X1) (the position of the two-dot chain line in the figure) that supports the drawn film 5a from below when the cutter 57 is operated, and the film clamping portion 36 Is moved toward the film standby section 38, the second position (X2) that does not impede the film clamping operation of the film clamping section 36, that is, the lower position that deviates from the movement line of the film clamping section 36 (solid line in the figure) D).
With the above configuration, when the film is cut, the film is moved upward to the first position (X1) to support the film from below to secure a stable cutting operation, and when the film is pulled out, the movement of the film clamping part (clamping operation) is inhibited. It moves down to the second position (X2) that does not, and secures stable film clamping and drawing.

  The cutter guide 58 is positioned at the first position (X1) for supporting the film from below when the cutter 57 is operated, and when the film clamping unit 36 moves toward the film standby unit 38, the film clamping unit As a method of moving to the second position (X2) that does not hinder the movement (clamping operation) of 36, a horizontal slide method can be mentioned. In this horizontal slide method, the cutter guide 58 is translated from the state of the first position (X1) to a position that does not obstruct the clamping operation of the film clamping unit 36 below the film standby unit 38, that is, the second position (X2). In this method, the cutter guide 58 can be moved horizontally (translated) by any method, such as a method using the contact pressure generated by the movement of the film clamping unit or a method using a dedicated power. However, when using dedicated power, it is necessary to synchronize the movement of the film clamping unit 36 with the timing.

  In the illustrated heat seal packaging apparatus, the film having a predetermined length drawn from the film roll by the above-described configuration is such that the rear side in the length direction (the side to be cut by the cutter) is the heat on the rear side in relation to the attachment position of the cutter. Although slightly protruding from the welding location, at least both the widthwise side of the film and the leading end side of the film can be thermally welded at substantially the same position as the outer peripheral edge of the base material. Thereby, the peripheral edge of the film or the peripheral edge of the base material does not protrude outward from the heat-welded portion, and packaging with good appearance is possible. In addition, the film of a predetermined length used for packaging is pulled out by holding the leading end of the film supported by the film standby unit with the film clamping unit, and the upstream side and the downstream side in the vicinity of the cut portion of the drawn film are Since it is supported from below with a guide and cut with a cutter, the film can be cut reliably and cleanly. And since the cut | disconnected front-end | tip part by the side of the film roll is adhered and hold | maintained at the film receiving part of a cutter guide by the said cutting | disconnection operation | movement, in order to pull out the film of the next packaging, a film clamping part moves toward a film standby part As a result, the cutter guide with the film tip attached and held swings (moves) below the film standby portion that does not hinder the holding operation of the film holding portion. As a result, the leading edge of the film adhered and held on the cutter guide is folded back and attached to the back side of the leading edge of the film standby section, or hangs downward from the leading edge of the film standby section and is forced to open and move forward. The leading end of the film is securely held by the portion. Therefore, a stable film drawing is ensured.

The film feed device of the present invention and the packaging device provided with the film feed device are not limited to the illustrated embodiments, and can be appropriately changed without departing from the scope of the present invention.
(1) In the embodiment, the cutter guide is swung by the contact pressure due to the movement of the film clamping unit. However, the cutter guide is swung by the power that operates in conjunction with the movement of the film clamping unit. You may do it.
(2) Although the film receiving portion of the cutter guide adheres and holds the leading end of the cut film, the function of attaching and holding the film is deteriorated when the surface of the film receiving portion is contaminated with dirt or the like. A cleaning tool (for example, a brush roller or the like) for rubbing the film receiving portion may be disposed on the moving system path.
(3) In the embodiment, the example in which the movement of the film clamping unit in the film feeding apparatus is automatically performed by the motor has been shown. However, the movement of the film clamping unit is not limited to being automatic by the motor, and may be a method of manually moving the film clamping unit. .
(4) In the embodiment, an example of an automatic type heat seal packaging device in which the film feed and the object to be packaged are electrically raised is shown as a packaging device provided with a film feed device, but is not limited thereto. Elevator type packaging equipment that pushes up the package on a horizontally stretched film and covers the peripheral surface of the package with the film, or manually lowers (moves) the film feed and packaging film It can also be used for a manual type heat seal packaging device. That is, the present invention is not limited to a specific packaging device, because it is used for a packaging device that draws a film to a packaging part where an article to be packaged is packaged and is wrapped by the drawn film.
(5) In the embodiment, the example in which the cutter is disposed on the upper side of the film drawn out by the film clamping unit and the cutter guide is disposed on the lower side of the film is shown.
(6) In the embodiment, the film receiving portion included in the cutter guide has shown an example in which the upstream side and the downstream side sandwiching the position where the cutter hits the film is supported. However, the present invention is not limited to this. Any one of the sides may be supported.

A ... Heat seal packaging device B ... Film feed device W ... Packaged object 4 ... Film roll arrangement part 5 ... Film roll 5a ... Film 36 ... Film clamping part 38 ... Film standby part 57 ... Cutter 58 ... Cutter guide 58a, 58b ... Film receiver X1 ... first position X2 ... second position

Claims (4)

From the film standby section, a film standby section for standby holding the film leading end pulled out from the film roll, a film holding section for pulling out the film by grasping the film front end waiting for the film standby section, and the film pulled out by the film clamping section In the film feed apparatus equipped with a cutter for cutting on the downstream side in the film conveying direction,
The cutter is disposed so as to be movable up and down with respect to the film drawn out by the film clamping unit, and is opposed to the cutter, and supports a position in the vicinity of a position where the cutter hits the film when the cutter operates to cut the film. A cutter guide with a film receiver is provided,
The cutter guide has a first position for supporting the film when the cutter is operated, and a second position that does not hinder the film clamping operation when the film clamping unit moves toward the film standby unit. position Ri variable freely der,
The cutter guide is supported so as to be able to swing, and is moved to the second position by contact due to the movement of the film sandwiching portion, and from the second position to the first position by releasing the contact of the film sandwiching portion. A film feed device, wherein the film feed device is restored . The film receiving portion of the cutter guide adheres and holds the cut end portion on the film roll side, and the end portion of the film is folded to the back side of the film standby portion by moving to the second position. Item 2. The film feed apparatus according to Item 1. The film receiving portion near the film standby portion of the cutter guide has a horizontal piece at the upper end in the direction of the film standby portion, and the horizontal piece has adhesiveness. 3. The film feed apparatus according to 1 or 2. A packaging device comprising the film feed device according to any one of claims 1 to 3 .

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