WO2005037650A1

WO2005037650A1 - Automatic film switching device

Info

Publication number: WO2005037650A1
Application number: PCT/JP2004/013438
Authority: WO
Inventors: Yasuhito Miyazawa; Kousuke Sakai; Naoki Yokoyama
Original assignee: Nippon Seiki Co.,Ltd.
Priority date: 2003-10-20
Filing date: 2004-09-15
Publication date: 2005-04-28
Also published as: JP2005145559A; JP4593138B2

Abstract

An automatic film switching device capable of continuously transferring a film by enabling the switching thereof by the secured connection of films, comprising a film connection part (30) formed of a thermally welding and fusing mechanism which connects the terminal part (FE1) side of the film (F1) from a supply film roll (R1) to the start end part (FS2) side of the film (F2) from a standby film roll (R2) by thermal welding and enables the fusion of the excess portion (FY1) of the film (F1) positioned on the terminal part (FE1) side of the supply film roll (R2) and a film end separating part (40) enabling the separation of the excess portion (FY1) of the film (F1) when the terminal part (FE1) side of the film (F1) is thermally welded to the start end part (FS2) side of the film (F2) by the film connection part (30). When the films (F1) and (F2) are connected to each other by thermal welding, a tension is applied to the excess portion (FY1) of the film (F1) positioned on the terminal part (FE1) side of the film (F1) by the exclusively installed film end separating part (40). Since a tensile action is applied to a heated and molten portion, the films can be easily separated from each other starting at the molten portion.

Description

Specification

Automatic film switching device

Technical field

[0001] The present invention is applied to, for example, a packaging machine that performs continuous packaging by drawing and transferring a film roll force film wound in a roll shape. In particular, continuous operation can be performed without stopping the packaging machine. The present invention relates to an automatic film switching device.

Background art

[0002] Conventionally, films used in filling and wrapping machines and stretch wrapping machines, etc., require that the wrapping machine be manually stopped when the film of the film roll wound up is consumed and the film roll is consumed. Was replaced and the packaging machine was running again. At this time, if all of the film on the film roll is pulled out and the film supplied to the packaging machine becomes empty, in a general packaging machine, a new film roll is set again and the start of the film is started. The problem is that the complicated work of pulling out the part and pulling the film between the multiple film feed rollers, the folding part, the seal roller and the cutter has to be repeated again. The machine was stopped, replaced with a new film roll, and the machine was operated again. For this reason, when the film roll is replaced, the packaging operation cannot be performed, which causes a reduction in the packaging operation efficiency. In addition, in the situation where the packaging power of articles is counted, packed, and shipped by recent automation daggers, shutting down the packaging machine also reduces the efficiency of all lines.

[0003] Therefore, a spare film roll is set in the packaging machine in advance separately from the film roll being supplied, and the start end of the film is fed out from the spare film roll cap and the film is connected to the film connecting portion. When the film of the film roll being supplied is consumed, it is detected by detecting the end of the film being supplied and the standby portion of the film being supplied is stopped when the film of the film roll being supplied is consumed. There has been proposed an automatic film switching apparatus in which films are connected to each other at the film connection portion and the film is continuously supplied without stopping the machine. (For example, see Patent Documents 1 and 2) Teru. )

Patent Document 1: Japanese Utility Model Publication No. 3-48009

Patent Document 2: Japanese Utility Model Publication No. 62-31381

Disclosure of the invention

Problems to be solved by the invention

[0004] In the film switching devices according to Patent Documents 1 and 2, a heat welding device is provided as a means for connecting the film of the supply film hole and the film of the preliminary film roll, and the film of the film roll being supplied has a predetermined amount. When it detects that the film has been consumed, the seal members are actuated and brought into close contact with each other to weld the film being supplied and the film in standby, thereby connecting the film and simultaneously switching to a new film roll.

[0005] As described above, as a means for removing the surplus portion of the film that has been supplied so far when connecting the film, a cutting blade for removing the surplus portion is provided adjacent to the heat welding device. In order to separate the excess portion of the film by the heat welding device as disclosed in Patent Document 1, or to remove the excess portion by hand, as shown in Patent Document 1, or as shown in Patent Document 2! By moving (falling) the roll core of the film roll that has lost its position to another position, tension is applied to the excess part of the film that has been connected so far, and the melting point force of the film by the heat welding device is automatically cut off It is configured as follows.

[0006] In the former case, it is necessary to provide a dedicated cutting blade at an adjacent position in addition to the heat welding device so as to cut off the surplus part and remove it. When the film becomes complicated and the cutting of the film becomes poor immediately, it is necessary to replace the cutting edge of the cutting blade. Further, as in Patent Document 1, it is necessary to manually remove an excess portion from a portion melted by a heat welding device by hand, and thus there is a problem that labor is increased. Also, in the latter Patent Document 2, etc., as a means for separating the surplus portion of the film, at the same time as switching the film roll, the surplus portion is automatically synchronized with the operation of automatically dropping the roll core downward. When the tension is applied to a certain film and the melting point is applied, the force is used to separate the film.Sometimes, the roll itself rotates and falls as the roll core falls, and this rotation causes The film is loose and the specified tension May not be added, and the parts to be divided may be connected. Therefore, it is necessary to remove the surplus portion of the film by manually pulling the surplus portion of the film to separate the supply side film from the surplus portion of the film.

Means for solving the problem

An object of the present invention is to provide an automatic film switching apparatus capable of performing a continuous film transfer by enabling a reliable film connection and paying attention to a conventional problem. A film supply unit for feeding the film of each of the film rolls so as to be guided and detachably supported, with the other film roll side in a supply state at a supply position and the other film roll side in a standby state at a standby position; and A standby film holding portion for temporarily holding and supporting the film start end side of the standby film roll to be unreeled in a pulled-out guide state, and the supply at a position upstream of the film from the position of the standby film holding portion. The end of the film of the film roll and the start of the film of the standby film roll are connected by heat welding, and A film connecting portion that is capable of fusing an excess portion of the film located at the end portion side of the film roll, which is a heat welding and fusing mechanism force, the end portion side of the film of the supply film roll by the film connecting portion, and the standby film. An automatic film switching device, comprising: a film end separation section that enables separation of an excess portion of the film of the supply film roll when the roll is thermally welded to the start end side of the film. (Claim 1)

[0008] Further, the automatic film switching device is characterized in that a pushing member for pushing and separating an excess portion of the film of the supply film roll is provided at the film end separating portion so as to be movable back and forth. (Claim 2)

[0009] Furthermore, the leading end of the pushing member of the film end separating section is provided so as to be able to change the angle of contact with the surplus portion of the film in the supply film hole, and the film automatic feature is provided. It is a switching device. (Claim 3)

[0010] Further, after the connecting operation between the film of the standby film roll and the film of the supply film roll by the film connection unit, the film supply unit is switched and continuously switched. The standby film roll, which is the side to be guided out to the unloading side, An automatic film switching device comprising a rotation mechanism for shifting to the one film roll supply state position. (Claim 4)

[0011] Further, there is provided an automatic film switching apparatus, wherein an energization time of a film connecting portion including the heat welding / fusing mechanism is set in accordance with the conditions of the film. (Claim 5)

The invention's effect

[0012] In the automatic film switching apparatus according to the present invention, the terminal end of the supply film roll and the start end of the standby film roll are connected by heat welding, and are located at the terminal end of the supply film roll. A heat-sealing and fusing mechanism that allows the surplus part of the film to be blown is provided. A film connecting part is provided. The end of the film on the supply film roll and the start of the film on the standby film roll are connected by the film connecting part. And a film edge cut-off portion for separating the surplus portion of the film of the supply film roll at the time of thermal welding with the film end of the supply film roll at the time of connection by heat welding of the film. The excess part of the film is tensioned by the dedicated film edge separation section, Since the action of pulling the portion that is melted by heating is applied by a shall be able to detach its melting point force easily can be achieved for the intended purpose.

Brief Description of Drawings

FIG. 1 is an overall schematic front view showing an automatic film switching apparatus in which a first embodiment of the present invention is applied to a filling and packaging machine.

FIG. 2 is an operation front view showing an operation state of a film connecting portion and the like of the automatic film switching device in FIG. 1.

FIG. 3 is an operation front view showing an operation state of a film end separating section of the automatic film switching device in FIG. 2.

FIG. 4 is an operation front view showing a cutting state of a supply-side film of the automatic film switching device in FIG. 3.

FIG. 5 is an operation front view showing a switching return state of the automatic film switching device in FIG. 4. [FIG. 6] FIG. 6 is a schematic perspective view showing a mounting angle setting mechanism of a pressing plate provided at a film edge cut-off portion facing a supply film in the automatic film switching apparatus according to the first embodiment.

FIG. 7 is an overall schematic front view mainly showing an automatic film switching device in a second embodiment.

FIG. 8 is an operational front view showing an operation state of a film transfer stopping means of the automatic film switching device in FIG. 7.

FIG. 9 is an operation front view showing an operation state of a film connection portion and the like of the automatic film switching device in FIG.

FIG. 10 is an operation front view showing an operation state of a film end separating portion and the like of the automatic film switching device in FIG. 9.

FIG. 11 is an operation front view showing a cutting state of a supply-side film and a cutting state of a chip of the film of the automatic film switching device in FIG.

FIG. 12 is an operation front view showing a switching return state of the automatic film switching device in FIG. 11.

FIG. 13 is a schematic front view showing a connection state between a supply film and a standby film and a separation state of unnecessary film surplus portions and film chips in the second embodiment.

Explanation of symbols

10 Film supply mechanism

11 Support frame

12 Roll holder

13 Guide roller

14 Support rollers

20 Standby film holder

21 frames

22 plates

23 cylinder 30 Film connection

31 Seal plate

31A Seal member

32 Seal backing plate

32A Tube cylinder 32

33 cylinder

34 Film invitation plate

35 cylinder

40 Film edge separation section

41 Press plate

42 cylinder

50 Rotation mechanism

51 rotating shaft

52 motor

60 accumulation means

70 Tension setting means

80 Film loosening means

90 Film transfer stopping means

100 Chip separation section

F1, F2 film

FE1 Film F1 end

FK Huinorem Fl, F2 chips

FS2 Start of film F2

FY1 surplus

R1 supply film roll

R2 Standby film roll

BEST MODE FOR CARRYING OUT THE INVENTION

In the present invention, one of the film rolls is set in a supply state at a supply position, and the other film roll is supplied. The film supply unit for feeding the film of each of the film rolls in a standby state at the standby position at the standby position and detachably supporting the film in a guideable manner, and the film start end side of the standby film roll fed from the film supply unit. A stand-by film holding portion for temporarily holding and supporting the draw-out guide, a position of the stand-by film holding portion, and a position upstream of the film at the end of the film of the supply film roll and the stand-by film opening. A heat-sealing mechanism that connects the start end of the film to the start end of the film by heat welding, and that allows the surplus portion of the film located at the end of the supply film roll to be cut off. Thermal welding of the end portion of the film of the supply film roll and the start end of the film of the standby film roll by a film connection portion And a film edge cut-off portion which can sometimes separate an excess portion of the film of the supply film roll. With this configuration, at the time of connection by thermal welding of the film, a surplus portion of the film on the side of the end of the film of the supply film roll is applied with a predetermined tension by the dedicated film end separating portion provided. It is possible to slurp and thereby apply a pulling action to a portion that has been heated and melted, so that the excess portion of the film at the melting point can be easily separated.

[0016] In addition, a pushing member for pushing and separating the surplus portion of the film of the supply film roll is provided at the film end separation portion so as to be able to move back and forth, so that a predetermined tension is applied to the surplus portion of the film. Since it is possible to heat the film, it is possible to easily and satisfactorily heat the film to separate the film portion in a molten state.

[0017] Further, the leading end of the pushing member of the film end separating section is provided so as to be capable of changing the angle of contact with the surplus portion of the film of the supply film roll, so that the film can be moved relative to the film. Since the applied stress can be separated from the melted portion while concentrating the applied stress on a part of the film, good separation can be achieved.

[0018] Further, the film supply unit is switched after the connection operation between the film of the standby film roll and the film of the supply film roll by the film connection unit, and is continuously fed out to the unloading side. A rotation mechanism is provided for shifting the standby film roll, which is to be rotated, to one of the film roll supply state positions. With this arrangement, it is possible to improve the feeding of the film and to easily switch the standby film hole to be prepared next.

[0019] In addition, by setting the energizing time of the film connecting portion composed of the thermal welding and fusing mechanism in accordance with the conditions of the film, the heating is performed in accordance with various conditions such as the material, thickness, and width of the film. By energizing, the heating temperature applied to the film can be set to an appropriate state, whereby the film can be satisfactorily separated from the film portion in the molten state while applying a predetermined tension by the film end separating portion. By heating and energizing the film connecting portion, the terminal end side of the supply film roll and the start end side of the film of the standby film roll can be satisfactorily connected by heat welding.

Example 1

Hereinafter, embodiments of the automatic film switching apparatus according to the present invention will be described with reference to the accompanying drawings.

FIGS. 1 to 6 show a first embodiment of the present invention, in which the automatic film switching apparatus in the first embodiment is applied to a filling and packaging machine. The schematic configuration and operation of the packaging machine will be described in detail with reference to FIGS.

[0022] In the figure, as an overall configuration of the filling and packaging mr, a film roll force, which will be described later, is fed and guided on the upper side of the main body side of the filling and packaging mr.

A film folding mechanism 1 for folding F1 into two is provided, and the film F1 folded by the film folding mechanism 1 is vertically sealed by a pair of vertical heat sealing holes 2A by a vertical sealing mechanism 2. The film F1, which has been sent out while being heat-sealed in the direction, is vertically sealed and formed into a cylindrical shape, is heat-sealed at predetermined intervals in the horizontal direction by the seal portions 3A provided on a pair of horizontal heat seal rolls by the horizontal seal mechanism 3. In addition, the packing bag P was continuously formed while filling the packing material from the nozzle 4A provided in the filling mechanism 4 into the cylindrical film F1 while the packing material was three- or four-sided by the film F1. Then, by cutting the middle of the horizontal sealing portion of the continuous packaging bag P by the cutter mechanism 5, the film packaging of the article to be packaged is performed. , Ru.

[0023] An automatic film switching device T is provided on the side of the main body of the filling / packaging balance, and at least one of the film rolls R1 is supplied to the automatic film switching device T. Film supply unit 10 that allows the other film roll R2 side to be fed out to the standby state and a standby film that temporarily stops and holds the film start end FS2 side of the standby film roll R2 that is unwound from the film supply unit 10 in the drawn-out guide state. The holding section 20 and the standby film are thermally welded to the end FE1 side of the supply film roll R1 and the start end FS2 side of the film F2 of the standby film roll R2 at a position upstream of the films Fl and F2 from the position of the holding section 20. And a film connecting portion 30 that allows the surplus portion FY1 of the film F1 located on the end portion FE1 side of the supply film roll R1 to be blown, and a film F1 of the supply film roll R1 by the film connecting portion 30. The surplus portion FY1 of the film F1 of the supply film roll R1 can be separated when the end FE1 side and the start end FS2 of the film F2 of the standby film roll R2 are heat-welded. A film edge separation portion 40, are provided respectively.

[0024] The film supply unit 10 in the first embodiment rotatably supports a film roll R1 for supply and a film roll R2 for standby, which are wound around a support frame 11 in a roll shape. Two roll holding units 12 and 12 are also provided, which provide a shaft force to be applied, so that one of the supply film rolls R1 supported by the roll holding units 12 and 12 can supply the band-shaped film F1 to the unloading side. A belt-like film F2 is provided so as to be guided out and guided from the other standby film roll R2 in a standby state.

[0025] Each of the roll holding units 12, 12 rotatably supports the film rolls Rl, R2 so that they can be detached and replaced, and also has a force such as an electromagnetic powder brake for braking the rotation of the film rolls Rl, R2. Braking means B are provided.

[0026] Guide rollers 13, 13 are provided on the support frame 11 adjacent to the roll holding units 12, 12, respectively, and one of the supply film rollers to be fed out and guided to the unloading side. The film F1 drawn from R1 is configured to be routed and arranged via a guide roller 13. Further, the film F2 of the other standby film roll R2 is configured to be drawn out and guided to the standby film holding unit 20 side via the support roller.

Further, after the film F1 of the supply film roll R1 runs out, a rotation mechanism 50 for switching to the film F2 of the standby film roll R2 is provided. In the rotation mechanism 50 in this embodiment, a rotation support shaft 51 for rotational drive is provided at the center of the support frame 11 that supports each of the film rolls Rl and R2. The rotation support shaft 51 is supported by the side of the main body of the filling and packaging mr, and is connected to a motor 52 serving as a drive source via an endless chain or pulley.

[0028] The standby film holding unit 20 is provided with a plate 22 for temporarily fixing via a film initial end FS2 on a frame 21 supporting the film initial end FS2 for standby along the width direction. ing. In this embodiment, a force holding the end of the film start end FS2 by the weight of the plate 22 itself is not shown. It is also possible to pinch and hold, or to magnetize the plate 22 itself and magnetically couple with the frame 21 to pinch and hold the end of the film start end FS2 lightly.

[0029] The film connecting portion 30 composed of a heat welding / heat fusing mechanism includes a seal plate 31 provided with a seal member 31A for heat-sealing at least on one side, and a pair with the seal plate 31. The seal receiving plate 32 is provided so as to be able to move back and forth (reciprocating) by a cylinder 33 so as to be openable and closable with the seal plate 31. ing. As the sealing member 31A in this embodiment, an impulse sealing method of heating only a predetermined time is adopted.

Further, the films Fl and F2 in the first embodiment are formed by a laminate layer composed of, for example, a base film layer made of a nylon resin film and a sealant layer made of a low-density polyethylene resin film. A film roll Rl, R2 is formed by winding a film Fl, F2 for packaging consisting of a body layer into a roll, and the sealing is performed according to various conditions such as the thickness and width dimensions of the film Fl, F2. The heating time of the sealing member 31A provided on the plate 31 is set.

[0031] Further, at the time of thermal welding between the end portion FE1 side of the film F1 of the supply film roll R1 and the start end portion FS2 side of the film F2 of the standby film roll R2 by the film connection portion 30, the film of the supply film roll R1 is formed. A surplus portion F1 of the film F1 is provided with a film edge separation section 40 for squeezing the tension so as to be separable. The film end separation portion 40 is provided with a pressing plate 41 serving as a pressing member along the width direction of each of the films Fl and F2, and presses and biases the pressing plate 41 side against the film F1. A cylinder 42 is provided, which is a driving means capable of reciprocatingly moving away from each other. At this time, the film F1 pulled out and guided from the supply film roll R1 is braked on the roll holding unit 12 by a powerful braking means B such as an electromagnetic powder brake for braking the rotation of the film aperture R1. Due to being hung, the force that guides the bow I out without loosening the film F1 is that the end portion FE1 side of the film F1 is also pressed by the forward movement of the pressing plate 41 of the film end separating portion 40. Thus, a predetermined tension is further added.

[0033] Further, an accu- lation for laying out the film F1 with a margin is provided between the film connecting portion 30 composed of the heat welding and heat fusing mechanism and the film folding mechanism 1 of the filling and wrapping space. A tension setting means 70 that swings and moves in accordance with the tension of the film F1 is provided. In this case, the accumulating means 60 is provided with a fixed roller 61 side and a movable roller 62 side capable of moving up and down, and waits when the film connecting portion is operated or the film F1 of the supply film roll R1 is lost. While the rotation mechanism 50 for switching to the film F2 of the film roll R2 is operating, that is, when the feeding of the film F1 on the supply side is stopped, while changing the length of the transport path between the rollers 61 and 62. The film F1 is configured to be sent out to the filling / packaging side via the tension setting means 70.

In this embodiment, as means for detecting the presence or absence or the remaining amount of the film roll R1 on the supply side set in the roll holding unit 12 provided on the support frame 11 of the film supply mechanism 10, Is calculated from the outer dimensions of the film roll R1 obtained from the transport speed of the film F1 and the rotation speed of the roll holding unit 12, and the presence or absence or the remaining amount of the film F1 is detected. When the wear state of the film F1 is detected in this manner, the feeding of the film F1 is stopped so that the film F1 of the film roll R1 is switched to the film roll R2 for standby, and the pair of seals formed by the film connection unit 30 is formed. The film 31 is sandwiched between the plate 31 and the seal receiving plate 32, and the pressing plate 41 of the film end separating portion 40 is moved forward to apply tension to the film F1. 3 When the sealing member 31A provided in 1 is energized for a predetermined time in accordance with the conditions of the films Fl and F2, the films Fl and F2 are fused and connected, and the heat-welding spot force is also excessive in the film F1. Part of FY1 side is configured to be blown. With reference to the configuration described above, the operation of the automatic film switching device, which is a main part of the present invention, provided in the filling and packaging machine will be mainly described.

First, in the film rolls Rl and R2 set in the film supply mechanism 10, the film F1 on the side of the film roll R1 for supply is drawn out through the guide roll 13 to the filling and packing equilibrium side which is the unloading side. The film F1 guided and fed out from the film roll is fed to a film folding mechanism 1 that folds the supplied film F1 into two folds, and the film F1 folded by the film folding mechanism 1 is paired by a vertical sealing mechanism 2. The folded ends of the film F1 are sent out while being thermally sealed in the vertical direction by the vertical heat seal roll 2A, and the vertically sealed and cylindrically formed film F1 is formed into a pair of horizontal heat seal rolls by the horizontal seal mechanism 3. The nozzle 4 provided in the filling mechanism 4 in the film F1 while being heat-sealed at predetermined intervals in the horizontal direction by the provided seal portion 3A The packing bag P is continuously formed by filling the package A with the package A, while the package F is three- or four-sided by the film F1. By cutting the middle of the horizontal sealing portion of the continuous packaging bag P by the cutter mechanism 5, the packaging bags P filled with the articles to be packaged are sequentially separated and sent out.

[0037] By the way, when the film F1 for packaging has run out, the feeding of the film F1 from the supply film port R1 is first stopped. Next, the cylinder 33 of the film connecting portion 30 is operated to move the seal receiving plate 32 forward, and this movement pushes the standby film start end FS2 side, and the standby film holding portion 20 temporarily fixes the frame 21 to the frame 21. The sealing plate 31 which is pulled out from the film start end FS2 side sandwiched between the plate 22 and the plate 22 and is fed out from the film start end FS2 side and paired with the terminal end FE1 side of the supply film F1. And the seal receiving plate 32 to be held therebetween. (See Figure 2)

In this state, the pressing plate 41 of the film end separating section 40 applies tension to the film F1 by the forward movement of the cylinder 42, and the sealing member 31A ( By heating for a predetermined time by the impulse sealing method), the two films F1 and F2 are melted and connected while overlapping. (See Figure 3)

At this time, since the end portion FE1 of the supply film F1 is also pressed by the pressing plate 41 of the film end separation portion 40 in the lateral direction, it is gradually heated by the seal member 31A. The film Fl is melted and melted, so that a bow I tension force is applied by a tension action to the bent portion, so that the melted portion force is also cut off. (See Figure 4)

As described above, by applying a predetermined tension to the surplus portion FY1 of the film F1, it is possible to easily and satisfactorily heat the portion of the film F1 in the molten state (excess portion FY1) and also to cut off the force.

When the film F1 is divided into the melted portions while the tension action is being reduced, the distal end side of the pressing plate 41 serving as a pushing member of the film end separating portion 40 is moved to the film F1 as shown in FIG. Surplus part of 1 The end of the film F1, which is on the FY1 side, is provided so that the angle of contact with the FE1 side can be changed, so that tension is applied in order from the side end of the film F1, so that the film F1 can be smoothly separated Becomes possible. In other words, the stress applied to the film F1 can be gradually separated while concentrating the stress applied to the film F1 on a part of the film F1, so that the separation can be performed well, and the material and thickness of the film can be improved. By setting the angle accordingly, the position where the film F1 is pressed is gradually shifted and concentrated and pressed, so that the concentrated and stressed molten spot force can be sequentially improved and separated.

[0042] After the film F1 on the supply side, which is the surplus portion FY1, is cut off, the cylinder 33 of the film connection portion 30 is actuated, the seal receiving plate 32 moves backward, and the film end separation portion 40 is moved. The pressing plate 41 is returned to the initial position by the backward movement of the cylinder 42.

Thereafter, in order to switch to the film F2 of the standby film roll R2, a motor 52 serving as a driving source provided in the rotation mechanism 50 is rotated to rotate the rotation support shaft 51 half a clockwise direction. Then, the standby film roll R2 is transported to the supply position of the supply film set first, and in this state, the film is again unwound as the supply film F1. (See Figure 5)

[0044] Further, the roll core of the vacant film roll supported by the roll holding unit 12 formed of a shaft and provided on the support frame 11 inverted by the rotation mechanism 50 is removed, and a new film is removed. By setting the roll in the roll holding unit 12, it is possible to prepare for the next preparation for standby.

Example 2 FIGS. 7 to 13 show a second embodiment of the present invention, in which an automatic film switching apparatus is applied to a filling and packaging machine in the same manner as in the first embodiment described above. The following description focuses on the configuration of the automatic film switching device.

In the same figure, in the film automatic switching device T, at least one of the film rolls R1 is set to the supply state and the other film roll R2 is set to the standby state in substantially the same manner as in the first embodiment. A film supply unit 10 that can be guided, a standby film holding unit 20 that temporarily holds the film start end FS2 side of the standby film roll R2 unwound from the film supply unit 10 in a guided state, and a standby film holding unit 20 At the position upstream of the films F1 and F2 from the position of, the end FE1 side of the supply film roll R1 and the start end FS2 side of the film F2 of the standby film roll R2 are connected by heat welding and supplied. The film connecting portion 30 that allows the surplus portion FY1 of the film F1 located on the end portion FE1 side of the film roll R1 to be blown, and the film of the supply film roll R1 by the film connecting portion 30. The surplus portion FY1 of the film F1 of the supply film roll R1 can be separated at the time of heat welding between the end portion FE1 side of the film F1 and the start end portion FS2 side of the film F2 of the standby film roll R2. Further, a rotation mechanism 50 for reversing the operation of the film supply unit 10 for switching to the film F2 of the standby film roll R2 after the film F1 of the supply film roll R1 runs out is provided.

The standby film holding unit 20 in the second embodiment includes a plate 22 for temporarily fixing the standby film start end FS2 side via the film start end FS2 on a frame 21 that supports the standby film start end FS2 side in the width direction. Is provided. In this case, in the second embodiment, the plate 22 is held by holding the end of the film start end FS2 between the frame 22 and the frame 21 by the operation of the cylinder 23, or is provided so as to be openable. You.

[0048] Further, a film connecting portion 30 composed of a heat fusing mechanism and a heat fusing mechanism is provided with a sealing plate 31 having a sealing member 31A for heat sealing on a side surface located on the side of the film F1 for supply, The seal plate is formed by a seal receiving plate 32 provided with a tube cylinder 32A disposed opposite to the plate 31 in the up and down direction, and a seal plate via a supply film F1 and a standby film F2. A film guiding plate 34 is arranged at a position facing the seal receiving plate 31 and the seal receiving plate 32. The film guiding plate 34 is supplied by reciprocating operation of the cylinder 35. The film F1 for standby and the film F2 for standby are guided between the seal plate 31 and the seal receiving plate 32 so as to be guided.

[0049] As the sealing member 31A provided on the sealing plate 31 in the second embodiment, an impulse sealing method of heating only a predetermined time according to various conditions of the films Fl and F2 is adopted. The film F1 for supply and the film F2 for standby are heated between the sealing member 31A and the tube cylinder 32A as the tube cylinder 32A provided on the seal receiving plate 32 expands and operates. Configured to be sealed

[0050] The films Fl and F2 in the second embodiment are, for example, a laminate composed of a base film layer made of a polyethylene terephthalate resin film or aluminum foil and a sealant layer made of a low density polyethylene resin film or the like. Films Rl, R2 are formed by laminating the packaging films Fl, F2 consisting of the laminated layers to form film rolls Rl, R2. In addition, the heating time of the seal member 31A provided on the seal plate 31 is set.

As the film end separating portion 40 of the supply film roll R1, a pressing plate 41 serving as a pressing member is provided along the width direction of each of the films Fl and F2 in the same manner as in the first embodiment described above. A cylinder 42 is provided, which is a driving means capable of reciprocating so as to urge the pressure plate 41 side against the film F1 or to separate the film F1 from the film F1.

Further, in the second embodiment, a film guiding plate is provided separately from the film end separating portion 40 of the supply film roll R 1, and a side portion of the film connecting portion 30 which also has a heat fusing mechanism and a heat fusing mechanism force. By the operation of 34, the feed film F1 and the start end FS2 of the standby film F2 are guided between the seal plate 31 and the seal receiving plate 32 and guided, and the rear ends of the films F1 and F2 are guided. There is provided a chip separating section 100 for separating chips FK to be melted and cut by a film connecting section 30 composed of a heat welding and heat fusing mechanism.

[0053] The chip separating portion 100 can also move in the horizontal direction (in a direction away from the film connecting portion 30 where the heat welding and the heat fusing mechanism force is also applied) by sandwiching the vertical force of the chips FK of the films Fl and F2. A pair of holding members 101 and 102 are provided, and are not shown in the drawing so as to be able to open and close at least one side. It is configured so that it can be opened and closed.

Further, in this embodiment, a film slackening means 80 for slackening the supply film F 1 in synchronization with the operation of the film guiding plate 34 is provided on the downstream side of the film connecting portion 30, and A film transfer stop means 90 is provided further downstream of the slack means 80 to stop feeding the film F1 for supply.

In this case, as the film loosening means 80, three guide rollers 81 are provided along the feeding direction of the film F1, and the guide roller 81 located at the center is reciprocated by the cylinder 82 via the support member. It is configured to be able to move to the left and right according to the movement, and at the time of ordinary transport of the film F1, three guide rollers 81 are arranged in a staggered pattern so that the film F1 is fed out. Has been. Then, when the cylinder 82 is operated in synchronization with the operation of the film guiding plate 34, the guide roller 81 located at the center shifts to the left side, and the film F1 is loosened. The film guiding plate 34 is configured so that the start end FS2 side of the standby film F2 and the loosened film F1 can be inserted between the sealing member 31A and the tube cylinder 32A by the film guiding plate 34. .

Further, as the film transfer stopping means 90, a stop member 91 is opposed to the guide roller 81 which is a part of the film loosening means 80 and is located closest to the unloading side via the supply film F1. When the stop member 91 is reciprocated by the cylinder 92, it is possible to switch between a pressing operation and an opening operation toward the guide roller 81.

Note that the unloading side (downstream of the film feeding direction) of the film transfer stopping means 90 is almost the same as in the first embodiment described above, and the film F1 is provided with a margin. The explanation of the operation of the accumulating means 60 for arranging and arranging and the tension setting means 70 which swings in accordance with the tension of the film F1 and the configuration and operation of the filling and packaging machine will be omitted here.

[0058] In the second embodiment having the above-described configuration, although not shown, the film F1 guided out of the film roll R1 for supply is sequentially fed out to the unloading side with the operation of the filling and packaging machine.

By the way, the film F1 on the supply film roll R1 side is consumed and becomes less than a predetermined amount. In this case, first, the feeding of the film F1 from the supply film roll R1 is stopped, and at the same time, the cylinder 92 of the film transfer stopping means 90 is operated, so that the stop member 91 is moved forward, and the stop member 91 is used for supply. And hold it against the guide roller 81 via the film F1. (See Figure 8)

In a state where the supply film F1 is held by the operation of the film transfer stopping means 90, the cylinder 82 of the film loosening means 80 is operated, and the guides located at the center in the vertical direction are arranged in the vertical direction. The movement of the roller 81 to the left causes the film F1 to be loosened. At the same time, when the cylinder 35 provided at the film connecting portion 30 moves forward, the film guiding plate 34 moves the start end portion FS2 side of the standby film F2 and the loosened film F1 portion to the sealing member 31A. Insert while pushing between tube cylinder 32A. (See Figure 9)

At this time, the start end FS 2 of the standby film F 2 moves the plate 22 provided on the standby film holding unit 20 so that the force of the frame 21 is also released by the operation of the cylinder 23. It is open.

[0062] Thereafter, the film guiding plate 34 is moved backward, and at the same time, the tube cylinder 32A provided on the seal receiving plate 32 of the film connecting portion 30 is expanded to supply the standby film F2 with the start end FS2 side. Film F1 is sandwiched and held between the sealing member 31A and the tube cylinder 32A. In this holding state, the pressing plate 41 of the film end separating section 40 is provided with tension to the film F1 by the forward movement of the cylinder 42, and is provided at the chip separating section 100 arranged on the side of the film connecting section 30. The pair of sandwiching members 101 and 102 sandwich and hold the start end FS2 side of the standby film F2 and the rear end of the supply film F1 from above and below. (See Figure 10)

Next, the sealing member 31 A (impulse sealing method) provided on the sealing plate 31 is heated for a predetermined time, that is, the materials and widths of the films Fl and F2, and the film Fl. By setting a predetermined time in accordance with various conditions such as the thickness of F2 and F2 and heating by energization, the two films Fl and F2 are melted and connected while overlapping.

At this time, since the end portion FE2 of the supply film F1 also exerts a tension in the lateral direction by the pressing plate 41 of the film end separation portion 40, it is heated by the seal member 31A. The film is melted, and the bow is stretched by the tension action at the point where it is stretched, so that it is easily separated from the melted point. Part FY1) Power is divided.

[0065] Further, the pair of sandwiching members 101 and 102 provided in the chip separating section 100 make the rear end of the start end FS2 side of the standby film F2 and the rear end of the supply film F1 point upward and downward. In this holding state, the holding chip separating portion 100 is moved away from the film connecting portion 30 which also has a heat welding / heat fusing mechanism, whereby the sealing member 31A is held. As a result, a tension force is applied to the portion heated and melted by the tension action, so that the chips FK of the films Fl and F2 located on the rear end side of the molten portion force are cut off. (See Figure 11)

After the film F1 on the supply side, which is the surplus portion FY1, is cut off, the pressing plate 41 of the film end separating section 40 is returned to the initial position by the cylinder 42 being moved backward.

[0067] Thereafter, by returning the expanded state of the tube cylinder 32A provided on the seal receiving plate 32 of the film connecting portion 30 to the original state, the action of sandwiching the films Fl and F2 is released, and the film transfer stopping means is released. When the 90 is also returned, the newly set film F1 for feeding is fed out and fed.

At this time, in order to switch to the film F2 of the standby film roll R2, the motor 52 serving as a drive source provided in the rotation mechanism 50 is rotated to rotate the rotation support shaft 51 half a clockwise direction. As a result, the standby film roll R2 is transferred to the initially set supply position of the supply film, and in this state, the film is again newly fed out as the supply film F1. (See Figure 12)

[0069] Further, the roll core of the vacant film roll supported by the roll holding unit 12 composed of a shaft and provided on the support frame 11 inverted by the rotation mechanism 50 is removed, and a new film is removed. By setting the roll in the roll holding unit 12, it is possible to prepare for the next preparation for standby.

In the automatic film switching apparatus according to each of the embodiments, the supply film roll and the standby film roll are sequentially extended in a column direction with respect to a film supply unit 10 that detachably supports the film roll so that the film roll can be fed out and guided. Roll R1 Film F1 Surplus FY1 The end of the supply film roll R1 is connected to the end FE1 of the supply film roll R1 and the start end FS2 of the film F2 of the standby film roll R2 by heat welding. A film connection portion 30 that allows the surplus portion FY1 of the film F1 located on the FE1 side to be blown, a standby film holding portion 20 that temporarily holds the standby end of the standby film roll R2 on the FS2 side in a drawn-out guide state, and By arranging and arranging them side by side, there is also an effect that they can be compactly packed without taking up much space.

[0071] The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the present invention. For example, in each of the embodiments, a film supply unit 10 that sequentially feeds out a film roll for supply and a film roll for standby and detachably supports it so as to be able to be guided is described as a type that supports two film rolls. The number of film rolls that can be set can be sequentially changed even if the number is three or more, and the width and shape of the sealing mechanism of the film connection part 30 are determined according to the material and thickness of the film. Can be set as appropriate, such as the sealing time and the timing !, and further effects can be expected by combining the components of each embodiment.

In each of the embodiments, as means for detecting the presence or absence or the remaining amount of the film roll, the film is calculated from the outer dimensions of the film roll R1 obtained from the transfer speed of the film F1 and the rotation speed of the roll holding unit 12, and By detecting the presence or absence or the remaining amount of F1, an optical sensor is provided on the side of the film roll, and the light is directly reflected on the side of the supply film roll and reflected, so that the consumption (remaining amount) of the supply film is reduced. It may be set so that light cannot be reflected when a certain degree is exceeded, and at this time, switching may be performed by sending a signal to the processor, and a tension sensor may be used as a sensor to detect the remaining amount of film. It may be detected by a sensor.

Further, in each embodiment, a force-free roller using a flat pressing plate 41 as a pressing member of the film end separating section 40 for cutting a predetermined tension on the supply film F1 is used. A pushing member having a shape such as a round bar may be applied. Industrial applicability Further, in the above-described embodiment, an example in which the automatic film switching device of the present invention is applied to a filling and packaging machine is described as a filling and packaging machine. It can be used as a mechanism to connect them

Claims

The scope of the claims

[1] A film supply unit that detachably supports the film of each of the film rolls so that one of the film rolls is in a supply state at a supply position and the other film roll is in a standby state at a standby position. A standby film holding portion for temporarily holding and supporting the film start end side of the standby film roll in a bow I extraction guide state; and a position upstream of the standby film holding portion. At the position, the end of the film of the supply film roll and the start of the film of the standby film roll are connected by heat welding, and the surplus portion of the film located at the end of the supply film roll. And a film connecting portion comprising a fusing mechanism, and a film connecting portion provided by the film connecting portion. And a film end separation portion that can separate an excess portion of the film of the supply film roll during thermal welding of the end portion of the film and the start end of the film of the standby film roll. Automatic film switching device.

[2] The automatic film switching according to claim 1, wherein a pushing member for pushing and separating an excess portion of the film of the supply film roll is provided at the film end separating section so as to be movable back and forth. apparatus.

[3] The film according to claim 2, wherein the leading end of the pushing member of the film end separating portion is provided so as to be able to change an angle of contact with a surplus portion of the film of the supply film roll. Automatic switching device.

[4] The film supply unit is switched after the connection operation between the film of the standby film roll and the film of the supply film roll by the film connection unit, and is continuously fed out to the unloading side. 2. The automatic film switching device according to claim 1, further comprising a rotation mechanism for shifting the standby film roll, which is to be moved, to the one film roll supply state position.

5. The automatic film switching device according to claim 1, wherein an energization time of the film connecting portion is set according to a condition of the film.