JP5625592B2 - Film feeding apparatus and packaging apparatus using the film feeding apparatus - Google Patents

Description

  The present invention relates to a film feeding apparatus that feeds a film to a packaging unit by grasping a leading end of a film that is pulled out from a film roll arranged in a film roll arrangement unit and waits at a predetermined position in a packaging device that wraps an article using a film. And a packaging device using the film feed device.

In the packaging apparatus using a film, the film tip pulled out from the film roll is supported by a pair of upper and lower identical comb-like members, and left and right of the film tip supported between the pair of upper and lower comb-like members. There is a film feeding device that grips a film portion positioned between comb teeth with a clamp member and feeds a length necessary for packaging (for example, see Patent Document 1).
This film feed device sandwiches the film tip between a pair of upper and lower comb-like members, so that when the film is gripped by the clamp member and pulled out a predetermined length and cut near the tip of the comb-like member, the film The leading end of the film connected to the roll side is held between a pair of upper and lower comb-like members without rolling up, so that the next end of the film is securely clamped by the clamp member during the next film feed. .

  The tip of the cut film tends to adhere to the cutter due to the self-adhesiveness of the film itself, etc. When the film adheres to the cutter, the initial position of the cutter (the standby position before cutting the film, for example, horizontally) The upper comb-like member positioned on the upper side of the film with respect to the lower comb-like member that supports the leading end portion of the film substantially horizontally is moved by the above-mentioned cutter. It functions to prevent the roller from sticking up and being pulled up.

However, in the film feed apparatus, the members that support the film tip in a substantially horizontal state are a pair of upper and lower comb-like members, so two comb-like members are necessary, and the cost is high due to the large size. The structure is complicated because two large comb-like members having the same shape must be provided in the apparatus.
In the case of a system in which the film is waiting between the film holding portions of the upper and lower comb-like members, the film between them is gripped by the clamping means and the film is fed, there is a space for the clamping means to grip the film. The film may be rolled up. Even if the film rolls up in the space, the clamp means needs to enter deeply into the film so that the film can be gripped. For this purpose, the clamping means must have a structure with a large opening, and the comb-like member also needs to have a deep notch depth in order to cope with the entry of the clamping means. In addition, since the comb-like member has a certain length (depth) in the traveling direction of the clamping means, there is a problem that the comb-like member is enlarged.

JP 2005-119711 A

  The present invention has been made in view of the above-described problems of the prior art, and a film feed device capable of preventing the film tip held at the standby position from being rolled up with a simple configuration, and a packaging using the film feed device. To provide an apparatus.

In order to achieve the above object, the film feed apparatus of the present invention comprises a holding means for holding the lower surface of the leading end of the film drawn from the film roll from below, a clamping means for grasping and pulling out the leading edge of the film, and a predetermined length drawer. In a film feed apparatus provided with a cutter that cuts the film in the vicinity of the downstream side from the holding means, a film that prevents the film tip from being pulled up by being attached to the cutter after film cutting at a position above the holding means The film pressing means is in a first position for pressing the film at least immediately before the film clamping operation of the clamping means, and in a second position that does not hinder the film clamping operation of the clamping means during the film clamping operation. been made to retreat movement, to the second position from said first position Retraction movement, characterized in that it is performed by the abutment by the film clamping operation of said clamping means (claim 1).
The holding means may be in any form that can hold the film width in a substantially horizontal shape, and may be, for example, a flat plate, a comb-shaped flat plate, or the like.
The film pressing means may be of any form that can suppress the rising of the leading edge of the film, and may be, for example, a round bar shape or a square bar shape.

Further, the film pressing means retreats to a second position that does not hinder the film clamping operation of the clamping means during the clamping operation in which the clamping means grips the leading edge of the film. Any method may be used such as interlocking or moving independently without interlocking with the film feed operation of the clamping means.
Further, the operation of feeding the film while sandwiching the film tip of the clamping means may be either an electric system using power such as a motor or a manual system for manually feeding the film.

  According to the above means, the film pressing means for pressing the film tip is disposed above the film tip held substantially horizontally by the holding means, so that the film presser is in a state of waiting on the holding means. The means prevents the film tip from rising upward. And when the clamping means moves to the holding means side to feed the film and clamps the film tip, the film pressing means retreats to a second position that does not hinder the film clamping operation of the clamping means, The film clamping operation by the clamping means is performed without any problem, and the film can be reliably fed to the packaging unit. Accordingly, the film pressing means can be reduced in cost by a simple structure without the conventional structure having a complicated comb tooth shape.

  The film drawn out by the clamping means is cut by a cutter at a position near the downstream side of the holding means, and a film having a predetermined length located in the packaging part is used for packaging. The other end of the cut, that is, the film tip connected to the film roll side may remain attached to the cutter due to the self-adhesiveness of the film, etc., because the film pressing member is located on the holding means, When the cutter after film cutting returns to the initial position (above the first position of the film pressing member), the leading end portion of the film is pressed by the film pressing means, so that it is possible to prevent the film from being pulled up and pulled together. Therefore, the leading edge of the film can be placed on a standby position on the holding means.

The retraction movement of the film pressing means from the first position to the second position may be either interlocked or non-interlocked with the film feed operation of the clamp means. during clamping means film nipping operation, it to is pressed and moved by contact (collision) to the film pressing means.
A method for the retraction movement of the film pressing means from the first position to the second position by the contact of the clamping means by the film clamping operation may be either a slide method or a swing method.

  According to the above means, the film pressing means for pressing the film on the holding means does not impede the film clamping operation of the clamping means by contact (collision) caused by movement of the clamping means for feeding the film during the film clamping operation. Therefore, it is not necessary to provide a dedicated driving device for moving the film pressing means from the first position to the second position, and the cost can be reduced.

The film holding means retracted and moved to the second position returns to the first position in preparation for the next film feed, and the return operation is performed using other power (for example, spring elastic force). However, the film pressing means may be restored by its own weight (gravity) (claim 2 ). The return method by its own weight (gravity) may be either a slide method or a swing method.
As a specific example of the slide system, for example, the film pressing means is a bar having a length substantially equal to the film width, and both sides in the longitudinal direction of the bar are left and right side plates supporting the bar. The guide groove is inserted into the formed guide groove, and the guide groove is inclined upward in the rearward direction in the direction in which the clamp means moves to hold the film waiting on the holding means (Claim 3 ). . The guide groove may be arc-shaped or linear. The bar may be a single bar member, but may have a two-member structure in which a tube shaft is fitted to a core shaft.

  According to the above means, the film pressing means is moved to the second position by the film clamping operation of the clamping means. Then, when the clamping means moves in the direction of feeding the film by pinching the film leading end on the holding means (the direction opposite to the moving direction for clamping the film leading end), the film pressing means also moves the clamping means. Following this, the film returns to the first position by its own weight, presses the film on the holding means, and after the film is cut, prevents the film tip from adhering to the cutter and curling up.

The film feed device can be installed in various film packaging devices (claim 4 ). In this case, the film wrapping apparatus is an overlap type wrapping apparatus that wraps the entire circumference of the tray containing the article with the film, or covers the upper surface of the tray containing the article with the film, and heats the film to the periphery of the tray. There is no limitation on the packaging type, such as a heat seal packaging device for welding.

  According to the above means, it is possible to provide a packaging apparatus that can stably and reliably feed a film by the action of the film feeding apparatus and can perform stable packaging.

The structure of the film feed device according to claim 1-3, wherein the present invention, it is unnecessary to provide a space for the clamping means grasps the film because the film holding means is retracted, less curling up of the cut film, the depth Film holding means is not required, so it can be made into a small film holding means, and the clamping means does not have to proceed deeply as in the prior art and does not need to grip the film. it is possible to simplify the, or, it is not necessary to provide a driving device for moving the full Irumu pressing means from the first position to the second position, it is possible to reduce the cost.
Further, according to the configuration of the third aspect , the film pressing means can be configured with a simple member, and the cost can be reduced.
Moreover, the structure of Claim 4 can provide the packaging apparatus which can maintain the stable film feed.

The external appearance perspective view which shows an example of the packaging apparatus provided with the film feed apparatus which concerns on this invention. The front view. The principal part of a film feed apparatus is shown, (a) is a top view, (b) is a longitudinal cross-sectional view shown with a part cut away. The state of the film pressing means at the time of film feeding is shown, (a) shows the state before the clamping means clamps the film leading edge, and (b) advances toward the holding means to clamp the film leading edge. The figure which shows a state when it did. (A) is a figure which shows the state of a film press means when the cutter act | operates and cut | disconnects the film which the clamp means fed, (b) is a film press means when the cutter which cut | disconnected the film returned to the initial position. The figure which shows a state. The other example of a film press means is shown, (a) is a schematic diagram which shows an example of a slide type, (b) is a schematic diagram which shows an example of a swing type, (c) is a schematic diagram which shows another example of a swing type.

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 wrapping apparatus A shown in FIGS. 1 and 2 places a package W on a flat base material, covers the package W with a stretch film, and covers the outer edge of the film W from the package 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 9 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, 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 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, between the plates 25 ′ inside the side plate 25, a shaft 28 is placed below the film roll arrangement portion 4, and the film 5 a connected to the film roll 5 is guided to the shaft 28 in the drawing direction. A guide roller 29 is attached via an electromagnetic clutch (not shown). That is, when the clamp means 36 of the film feeding device 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 clamp means 36 proceeds to grip the standby film, the electromagnetic clutch is turned on and the guide roller 29 does not rotate.
Further, toothed pulleys 31 and 32 are respectively fixed to the shaft end of the shaft 30 that is rotatably mounted on the shaft end of the shaft 28 and the opposite end of the cradle 24. 32, and a toothed belt 33 is wound around a driving pulley attached to a rotating shaft of a film feeding motor (for example, a stepping motor) 37c of the film feeding apparatus B. The shaft 28 is configured to rotate. A toothed pulley is similarly fixed to the opposite ends of the shaft 28 and the shaft 30, and a toothed belt is wound around the pulley. The toothed belt 33 is connected to a clamping means of a film feed device B, which will be described later, so that the clamping means 36 reciprocates as the toothed belt 33 rotates forward and backward.

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 holding means (film standby part) 38 of the film feed apparatus B is formed in this horizontal piece 34a.

  The holding means (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 34a with the tip side forward from the horizontal piece 34a. 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 clamped by the clamp means 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, supports the leading end of the film from below so that the clamping by the clamping means 36 is stably performed.

  As shown in FIG. 3 (b), the clamp means 36 has a movable lower plate 36b pivotally supported by a shaft 36c on the lower side of the fixed upper plate 36a and fixed to a rear position from the shaft 36c. A spring 36d is elastically mounted across the plate 36a and 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 holding means 38 is located.
The inclined guide plate 39 is movable under the condition that the clamp means 36 moves forward along the lower surfaces of the suction means 7 and the heater portion 8 in order to sandwich the leading end of the film 5a, and is closed at a position just before the end of the forward movement. The plate 36b is forcibly opened against the spring force of the spring 36d. The guide roller 36e attached to the outer side surface of the movable lower plate 36b in the closed state is moved forward and downward to a position on the horizontal line on the line passing therethrough. The guide roller 36e comes into contact with the guide inclined plate 39 and continues moving forward, so that the leading end side (the side on which the film is attached) of the movable lower plate 36b is moved downward and held about the shaft 36c. Positioned below the means 38 and after passing through the guide inclined plate 39, it is closed by the elastic force of the spring 36 d, and the fixed upper plate 36 a located above the holding means 38 and the tip of the film 5 a and the holding means 38. The to 挾着.
The inclined guide plate 39 is fixed in an inclined state in the direction in which the guide roller 36e is abutted forward, and after the guide roller 36e is guided along the lower surface of the guide inclined plate 39 (after the leading edge of the film is attached) ), When the clamp means 36 is switched back (retracted) and passes the upper surface side of the guide inclined plate 39, the inclined plate 39 is attached so as to be able to fall down so as not to hinder the movement of the guide roller 36e, Further, after passing through the guide roller 36e, the inclined guide inclined plate 39 is pulled by a spring or the like so as to return to the initial state (inclined state in which the guide roller 36e is guided downward in the traveling direction).

As shown in FIGS. 1 and 2, the drive unit 37 for reciprocating the clamp means 36 includes guide shafts 37a and 37′a arranged from the front end to the rear end on the left and right side surfaces of the cradle 24, and the guide shafts. The sliding bodies 37b and 37'b slidably attached to 37a and 37'a, the toothed belts 33 and 33 'rotatably arranged on the outer side of the receiving base 24, and the toothed belt 33 are driven. 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 clamp means 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 clamp means 36 connected to the slide bodies 37b and 37'b also slides. When the forward movement (advance), the clamp means 36 opens and closes the tip of the film 5a. When the backward movement (retreat), the clamp means 36 moves backward while holding the front end of the film 5a. An appropriate amount (length) of film can be drawn.

As shown in FIG. 3, a film pressing means 40 for preventing the tip of the film 5a held on the holding means 38 from rising up is provided above the holding means (film standby section) 38, and the clamp. A cutter 41 for cutting the film 5a fed by the operation of the means 36 is disposed.
The film pressing means 40 is configured by rotatably fitting a tube rod 40b to a core shaft 40a, and both ends of the core shaft 40a are arc-shaped formed on a plate 25 ′ attached to the inside of the side plate 25. It is fitted in the guide groove 42 and attached so as to slide up and down along the guide groove 42.
The guide groove 42 is formed in an arc shape that is inclined upward from the upper position in the vicinity of the tip of the film support plate 38 'toward the film clamping direction of the clamp means 36, and the length of the guide groove 42 is the clamp means. It is formed in a length that does not hinder 36 film clamping operation (movement).
That is, the guide groove 42 obstructs the film clamping operation of the clamp means and the first position P1 (the lower end of the guide groove 42) for pressing the film pressing means 40 on the film support plate 38 '. The second position P2 (the high end of the guide groove 42) is not defined.
The tube rod 40b that is rotatably fitted to the core shaft 40a is attached in a non-contact state with its outer peripheral surface in contact with the film 5a or with a gap. Even when the surface of the tube rod 40b is attached in contact with the film, the tube rod 40b is rotatable about the core shaft 40a, so that when the film 5a is fed, it rotates in the feed direction of the film 5a. The feed is not disturbed.

  The cutter 41 cuts the film 5a, which is covered with an object to be packaged and thermally welded to the periphery of the base material 9, at a position forward of the holding means 38. The cutter 41 is moved up and down by an electromagnetic solenoid 43. Yes. A cutter guide 44 is arranged at a position facing the cutting edge of the cutter 41, that is, a position below the film 5a drawn out by the clamping means 36, at a position for supporting the drawn film 5a substantially horizontally ( (Refer FIG.3 (b)).

The cutter guide 44 includes a film receiving portion 44a that supports an upstream side and a downstream side near the position where the cutter 41 hits the film 5a from below when the cutter 41 descends and cuts the film 5a. Yes.
The interval between the film receiving portions 44a is slightly wider than the thickness of the cutter 41, thereby supporting the film 5a in a substantially straight state, ensuring the cutting of the film, and the cutting surface (end surface) being linear. I try to be beautiful.
The cutter guide 44 is supported by a linear reciprocating mechanism such as an air cylinder 45 so as to be vertically movable in the vertical direction. As a result, the cutter guide 44 rises to an upper position (see FIG. 5A) that supports the drawn film 5a from below when the cutter 41 is operated, and the clamping means 36 moves toward the holding means 38. In this case, the clamp means 36 descends to a lower position that does not obstruct the film clamping operation, that is, a lower position that deviates from the movement line of the clamp means 36 (see FIGS. 4A and 4B).
With the above configuration, when the film is cut, the film 5a moves upward to support the film 5a from below to secure a stable cutting operation, and when the film 5a is pulled out, the lower position does not hinder the movement (clamping operation) of the clamp means 36. To secure stable film clamping and pulling out.

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.
The suction means 7 includes a double box frame 7a and an electric fan 7b that generates a suction force in a space formed by the double box frame 7a (see FIG. 2).
And the heater part 8 is formed in the outer side of the suction part of the double box frame 7a of the said suction means 7 so that this suction part may be enclosed (refer Fig.3 (a), (b)).

Next, the operation of the film pressing means 40 in the film feed of the clamping means 36 will be described with reference to FIGS.
First, as shown in FIG. 4A, the film pressing means 40 composed of the core shaft 40a and the tube shaft 40b is moved by gravity using the height difference of the guide groove 42 before the film clamping operation of the clamping means 36. It is located at one position P1 (the lower end of the guide groove 42) and suppresses the leading edge of the film 5a from rising. When the clamp means 36 starts moving toward the holding means 38 for film feeding, the film pressing means 40 located at the first position P1 is moved to the clamp means 36 as shown in FIG. And is moved to the second position P2 (the high end of the guide groove 42) that does not hinder the film clamping operation of the clamping means 36. When the clamp means 36 clamps the leading end of the film held on the film support plate 38 ′ and moves in the direction of feeding the film (the direction away from the holding means 38, the left direction in the drawing), the film pressing means 40 is moved to the clamp Following the movement of the means 36, using the height difference of the guide groove 42 from the second position P2, it moves toward the first position P1 by gravity and returns to the state of pressing the film leading edge.

When the clamping means 36 moves in the direction of feeding while sandwiching the leading end of the film and feeds a film of a length necessary for packaging, the base material 9 and the base material placing portion 2 on which the packaged material is placed actuate the moving means 3. The film 5a and the base material 9 are pressed by the heater part 8 and the base material mounting part 2 (heater receiving part), and the periphery of the film 5a is thermally welded to the surface of the base material 9. The
When the thermal welding of the film is finished, as shown in FIG. 5A, the cutter guide 44 is raised to support the film 5a from below, while the cutter 41 is lowered to cut the film 5a and cut the package. .

  The cutter 41 that cuts the film is returned to the initial position above the film by the operation of the electromagnetic solenoid 43. At the time of returning to the initial position, one end of the cut film 5a (the film tip connected to the film roll) is the film. There is also a possibility that the film 5a is pulled up together with the rise of the cutter 41 returning to the initial position due to its own self-adhesiveness. However, as shown in FIG. 5B, since the film pressing means 40 is located at the first position P1 on the holding means 38, the film 5a attached to the cutter 41 and being lifted hits the film pressing means 40. The film 5a is pulled away from the cutter 41. That is, the front end portion of the cut film 5a is pressed by the film pressing means 40 and is prevented from adhering to the cutter 41 and being rolled up. As a result, the leading edge of the film connected to the film roll cut by the cutter 41 is always held substantially horizontally on the holding means 38 and holds a stable posture for film feeding by the clamping means 36.

The film pressing means 40 is retreated to a position (second position P2) that does not obstruct the film clamping operation by the film clamping operation of the clamping means 36, and follows the film feed of the clamping means 36 to hold on the holding means 38. Although the slide type that moves by gravity to the position (first position P1) for pressing the film front end is shown, the present invention is not limited to this. Hereinafter, another modification will be described with reference to FIG.
FIG. 6A shows the same slide-type film pressing means 40 as in the previous embodiment, which is constructed by fitting a tube rod 40b to the core shaft 40a as in the previous embodiment, and the film pressing means 40 is a holding means. The core shaft 40a is inserted into the straight long hole 46 formed in the plate 25 'on the inner side of the left and right side plates 25 so as to move horizontally from the first position P1 to the second position P2 with a space substantially the same as 38. Is supported by fitting. The film pressing means 40 is biased by the spring 47 so as to be positioned at the first position P1.
Accordingly, the movement from the first position P1 to the second position P2 is performed by the abutting push by the film clamping operation of the clamping means 36 as in the previous embodiment, and the clamping means 36 holds the film 5a. When moving in the feed direction, the elastic force of the spring 47 automatically returns from the second position P2 to the first position P1.

FIG. 6B shows a swing-type film pressing means, in which the hanging rods 48 are connected to both sides of the core shaft 40a in the film holding means 40 similar to the previous embodiment, and the upper portions of the left and right hanging rods 48 are connected to the side plate 25. It is suspended and supported by a plate 25 'on the inside so as to be swingable.
This swing type film pressing means 40 is located at the first position P1 by gravity, and when the clamping means 36 moves to clamp the film, it is abutted and pushed by the movement and retreats to the second position P2. Is done. Then, when the clamp means 36 sandwiches the film and moves backward, it swings in the direction from the second position P2 to the first position P1 and returns. In addition, when swinging and returning from the second position P2 to the first position P1, a stopper may be provided to stop immediately at the first position P1.

  FIG. 6C is an example in which the film pressing means 40 of FIG. 6B is formed of a flat plate, and one side end of a metal plate or a resin plate having substantially the same width as the film width is substantially U-shaped. The presser plate 49 bent in the above manner is suspended and supported on the inner plate 25 ′ of the left and right side plates 25 so as to be swingable. The reason for bending the tip of the pressing plate 49 is to prevent the film from being damaged even when it comes into contact with the film and to smoothly feed the film.

The film feed means and the packaging device of the present invention are not limited to the illustrated embodiments, and can be appropriately changed without changing the gist of the present invention.
(1) In the embodiment, the double structure in which the tube shaft is fitted to the core shaft is shown as the slide type of the film pressing means. However, the present invention is not limited to this, and a structure composed of a single bar may be used.
(2) In the embodiment, the comb-shaped flat plate is shown as the holding means for mounting and holding the leading edge of the film. However, the present invention is not limited to this, and a flat plate that supports the entire width of the film may be used.
(3) In the embodiment, the example in which the film pressing unit retreats from the first position to the second position by the contact (collision) due to the movement of the film clamping operation of the clamping unit is shown, but the present invention is not limited thereto. In conjunction with the film clamping operation of the clamping means, the film pressing means may be retracted from the first position to the second position in a non-contact manner, for example, by a link mechanism or the like.
(4) In the embodiment, an example of a heat seal packaging device is shown as a packaging device using a film feed device. However, the present invention is not limited to this, and the package (tray) is pushed up to the stretched film to surround the package. An overlap-type packaging device may be used in which the surface is covered with a film, and the periphery of the film is folded on the bottom side of the packaged object and packaged.
(5) In the embodiment, the clamp means in the film feed apparatus is moved by the moving means using a motor. However, the present invention is not limited to this, and it may be moved manually.
(6) In the embodiment, it has been described that the film front end is pressed by the film pressing unit over the entire width of the film, but when the clamping unit for clamping the film grips around the center of the film, for example, It may be a film presser that presses the leading end of the film at the approximate center. That is, the film pressing means in the present invention is not limited to the one that presses the leading edge of the film over the entire film width.

A ... Heat seal packaging device (packaging device)
B ... Film feed device
DESCRIPTION OF SYMBOLS 5 ... Film roll 5a ... Film 36 ... Clamp means 38 ... Holding means 40, 49 ... Film pressing means 41 ... Cutter 42 ... Guide groove P1 ... First position P2 ... Second position

Claims (4)

A holding means for holding the lower surface of the leading end of the film drawn from the film roll from below, a clamping means for grasping and pulling out the leading edge of the film, and a cutter for cutting the film pulled out a predetermined length near the downstream side of the holding means. In the film feed apparatus provided,
At the upper position of the holding means, provided with a film pressing means for preventing the film tip from being rolled up and attached to the cutter after film cutting,
The film retainer means, the film nipping operation immediately before the at least the clamping means is in a first position for pressing the film, during the film nipping operation intended to save moved to a second position which does not inhibit the film nipping operation of the clamping means The retracting movement from the first position to the second position is performed by contact of the clamping means by a film clamping operation . 2. The film feeding apparatus according to claim 1 , wherein the film pressing means retracted and moved to the second position returns to the first position by its own weight as the film is fed by the clamping means . The film pressing means is a bar having a substantially film width length, and both sides in the longitudinal direction of the bar are fitted into guide grooves formed on the left and right side plates supporting the bar, and 3. The film feed apparatus according to claim 2, wherein the guide groove is inclined upward in the rear direction in which the clamp means advances when the film waiting on the holding means is clamped . A packaging device comprising the film feed device according to any one of claims 1 to 3 .

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