JP2004250129A - Film conveyance device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To convey film to a prescribed position at high speed in a continuous process so that the thin, weak band-like film does not generate flaw, wrinkle, and bending or the like in a film conveyance device. <P>SOLUTION: A mounting conveyor 11 is provided at the lower surface side of the film f and a holding conveyors 12, 12 are provided at side parts. An end part at the downstream side of the mounting conveyor 11 extends from the holding conveyor 12 by a distance L<SB>1</SB>. An abutting roller mechanism 25 is provided so that elongation and displacement are not generated at the upstream side. Variable speed rapid feed holding conveyor 13, 13 are provided near the conveyance direction of the holding conveyor 12. The film f provided with a cut line f<SB>p</SB>is synchronously conveyed in the mounting conveyor 11 at main conveying speed V<SB>1</SB>, and the abutting roller mechanism 25 is actuated at the upstream of the cut line f<SB>p</SB>to cut and separate the film by rapidly conveying at the rapid conveying speed V2 by the rapid holding conveyor 13. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a film transport apparatus.
[0002]
[Prior art]
Conventionally, in order to wrap a workpiece such as various products, a film transport apparatus that draws a flexible film member from a continuous roll, spreads it into a planar shape, transports it by a conveyor, etc., and cuts it to a predetermined size during the transport. Are known. In order to stably convey a flexible film member, these apparatuses first provide a perforated cut and convey it, pulling the film member with a difference in conveyance speed between the upstream side and the downstream side of the conveyance, In many cases, it is cut and separated from the cut, and after separation, it is transported to the arrangement position of the next process.
For example, in the packaging apparatus described in Patent Document 1, a foil drawn from a roll is fed out at a predetermined speed by a guide roll. The foil is supported on the lower surface by a belt that travels at a higher speed than the guide roll, and is pulled flat without being constrained. A cut line is provided by a punch during the conveyance. When the front end of the foil is caught in another belt that abuts on the rear end side of the belt, the foil is advanced at a speed higher than that of the guide roll and separated and cut from the cut line. And when it is conveyed as a foil sheet at high speed and the packaging process of the following process is complete | finished, foil is drawn out again and the said process is repeated.
Further, for example, in the supply device for the strip-shaped packaging material described in Patent Document 2, the strip-shaped member supplied from the supply roll is fed out by the pinch roll. And it is conveyed by a belt loop and cut | disconnected by the rotary blade in the middle, and is set as a packaging sheet. After that, it is caught in two pairs of belts provided with teeth that mesh with each other in a non-contact manner, and is conveyed to a predetermined position under variable speed control.
[0003]
[Patent Document 1]
Japanese Patent Publication No. 50-15192 (page 2-4, FIG. 1, FIG. 9-12)
[Patent Document 2]
US Pat. No. 4,811,544 (page 2-4, FIG. 1, FIG. 9-12)
[0004]
[Problems to be solved by the invention]
However, the conventional film transport apparatus as described above has the following problems.
In the technique described in Patent Document 1, since the speed of the belt is higher than the feeding speed of the guide roll, the foil is slip-conveyed. Therefore, since the foil receives frictional sliding of the belt from the lower surface, the foil is conveyed in a state where tension is applied while being rubbed. Further, since it is not pressed from the upper side, it is bitten by another belt with its leading end being unstable. As a result, there is a problem that vertical warp is likely to occur.
Further, in this configuration, the belt also serves as the conveyance of the foil after feeding, the cutting and separation of the foil, and the high-speed conveyance to the next process. Therefore, in order to ensure the work tact of the next process, It is necessary to perform intermittent operation to stop feeding. As a result, there is a problem that it is impossible to achieve a smooth continuous process, which hinders speeding up.
Further, in the technique described in Patent Document 2, since the belt-like member is bitten and transported by the belt having teeth provided on the outer periphery of the belt, the belt-like member is likely to have a bite mark and stretched by being pulled locally. There is a problem that it may be deformed or scratched. These effects are likely to be noticeable when the belt-like member is made of a thin and weak film.
Further, when a cut is provided by a rotary blade and the belt is driven at a higher speed than the belt loop, there is a problem that bite marks, deformation, scratches, etc. are more likely to occur.
[0005]
The present invention has been made in view of such problems. For example, a thin, soft belt-like film such as a wrap or a stretch film is not continuously scratched, wrinkled, bent, and the like. An object of the present invention is to provide a film transport apparatus capable of high-speed transport to a predetermined position in a simple process.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, in the invention according to claim 1, a film transporting device that separates at the slit while transporting a strip-like film provided with a slit in the short width direction in the longitudinal direction, Provided at an intermediate portion in the transport width direction orthogonal to the transport direction, supports one surface of the film and transports it at a predetermined main transport speed, and on the left and right in the transport direction of the surface support transport unit Side transfer means that are respectively provided and can be transferred in synchronization with the main transfer speed of the surface support transfer means, and the side transfer means and the transfer direction in proximity to the downstream end of the side transfer means. And a variable speed transfer means capable of transferring by switching between the main transfer speed and a rapid transfer speed higher than the main transfer speed.
According to the present invention, on the upstream side, one surface of the film and the left and right sides thereof are supported at a constant speed while being supported by the surface supporting and conveying means synchronized with the main conveying speed and the two side conveying means. Is done. On the downstream side, the left and right sides of the film are evenly conveyed by variable speed conveyance means that can switch between the main conveyance speed and the rapid conveyance speed. Therefore, even if the film is thin and soft, it is stably transported in the form of a sheet on the upstream side, and is then transferred to the variable speed transport means synchronized with the main transport speed while maintaining the state, so that the variable speed transport is ensured. After being gripped by the means, the variable speed conveying means can be switched to the abrupt conveying speed to smoothly shift to the abrupt conveyance without generating left and right uneven conveying force.
[0007]
According to a second aspect of the present invention, in the film conveying apparatus according to the first aspect, the downstream end portion of the surface support conveying means extends further downstream than the downstream end portion of the side conveying means. Further, a parallel transport region in which a part of the variable speed transport means is disposed in parallel is provided on the left and right in the transport direction.
According to the present invention, since the parallel transport region is provided at the downstream end of the surface support transport unit, at the initial stage of transport by the variable speed transport unit, one surface of the film is brought to the main transport speed by the surface support transport unit. Since the film is supported in a synchronized state, the variable speed conveying means is maintained while the surface shape of the film leading end portion is stabilized by synchronizing the variable speed conveying means with the main conveying speed while the film leading edge is in the parallel conveying area. It is possible to shift the conveyance.
[0008]
According to a third aspect of the present invention, in the film conveying apparatus according to the first or second aspect, the first nipping conveyance in which the side conveying means is driven in synchronization with each other while nipping the film in its thickness direction. Provided with a mechanism, and when the film is transported at the rapid transport speed by the variable speed transport means, the film can slip downstream from a predetermined position in an intermediate portion in the transport direction between the first nipping and transporting mechanisms. It is said that.
According to the present invention, since the side conveyance means comprises the first nipping and conveying means that are driven in synchronization with each other by nipping the film in the thickness direction, the film can be reliably nipped even if it is a thin and soft film. Can be transported. Further, when the film is transported at a rapid transport speed by the variable speed transport means, it is possible to slip downstream from a predetermined position in the transport direction. Therefore, when the break moves downstream from the predetermined position, the break can be easily made. The separated and separated film is smoothly transported at a rapid transport speed.
[0009]
According to a fourth aspect of the present invention, in the film conveying apparatus according to the third aspect, a nipping auxiliary means for increasing a nipping force of the film is provided at the predetermined position of the first nipping / conveying mechanism.
According to the present invention, the clamping assisting means for increasing the clamping force of the film is disposed at a predetermined position of the first clamping conveyance mechanism. Therefore, even if the film is pulled on the downstream side of the predetermined position, on the upstream side of the predetermined position. Further, since the film can be prevented from being stretched or displaced, the cut can be smoothly cut and separated downstream of the film while stably feeding the film stably.
[0010]
According to a fifth aspect of the present invention, in the film conveying apparatus according to the fourth aspect, the sandwiching assisting means is provided so that the arrangement position can be changed in accordance with the conveying direction pitch of the film break.
According to the present invention, when the film is transported suddenly, even if the transport direction pitch of the break changes, by changing the arrangement position of the clamping assist means, the slip always slips in the vicinity of the upstream side of the break position at the start of the sudden transport. Therefore, the length in the transport direction of the upstream film that receives the tensile force at the time of cutting and separation can be shortened, and the deformation of the film can be significantly reduced.
[0011]
According to a sixth aspect of the present invention, in the film conveying apparatus according to the fifth aspect, when the variable speed conveying means is switched to the rapid conveying speed, the clamping assisting means is the first and second from the leading edge of the film. It is set as the structure which was arrange | positioned in the intermediate part of this cut | interruption.
According to the present invention, when the variable speed conveying means is switched to the rapid conveying speed, the clamping force is enhanced by the clamping assisting means at the intermediate portion between the first and second cuts from the film leading end. Thus, even if the film is pulled downstream, there is no elongation or misalignment on the upstream side of the sandwiching assisting means. Therefore, the second cut is not separated, and the first cut is surely cut and separated. And even if the film break interval is changed, such a positional relationship can be maintained by changing the arrangement position of the holding assist means, so the film is separated for each break regardless of the film break interval. It can be cut and separated reliably.
It should be noted that in order to reduce the load such as the stretch of the film between the first cut and the sandwiching assisting means, it is preferable that the arrangement position of the sandwiching assisting means is brought closer to the first break. Most preferably in the vicinity of the upstream side of the first cut.
[0012]
According to a seventh aspect of the present invention, in the film conveyance device according to any one of the third to sixth aspects, the first nipping and conveying mechanism on one side of the film at the downstream end of the side conveying means. A part of the variable speed conveying means is opposed to sandwich the film in the extended conveying part, and the facing distance is upstream. It is set as the structure arrange | positioned so that it may decrease toward the downstream from the side.
According to the present invention, a gap narrowing in the film thickness direction is formed toward the transport direction by a part of the variable speed transport means for the film transported to the extended transport section, and the film is guided by the downstream side while being guided thereby. Since the film is nipped, the film can be smoothly transferred to the variable speed conveying means while maintaining the film conveyance state by the first nipping and conveying mechanism.
[0013]
In the invention according to claim 8, in the film transport apparatus according to any one of claims 2 to 7, the transport speed of the variable speed transport means is as long as the leading edge of the film is in the parallel transport region. It is synchronized with the main transport speed, and is controlled so as to be changed to the rapid transport speed when the leading edge of the film is transported a predetermined distance or more from the parallel transport region to the downstream side.
According to the present invention, while the leading edge of the film is in the parallel conveyance area, the surface support conveyance means, the side conveyance means, and the variable speed conveyance means are synchronized with the main conveyance speed, so that the film is in a planar state. Can be transported while maintaining Then, when the film is transported more than a predetermined distance from the parallel transport area, for example, when the variable speed transport means has a transport force on the film that exceeds a load suitable for cutting and separating the cut, the film transport is performed by changing to the rapid transport speed It can be cut and separated in a short time while maintaining the shape.
[0014]
According to a ninth aspect of the present invention, in the film transport apparatus according to any one of the first to eighth aspects, the variable speed transport means is driven in synchronization with each other while sandwiching the film in its thickness direction. A second holding and conveying mechanism that can change the holding force at the timing of the second holding mechanism, and the holding force is changed according to the transfer speed of the second holding and conveying mechanism.
According to the present invention, the film is sandwiched in the right and left of the transport direction and can be transported without applying a load to the film by the second sandwich transport mechanism that is driven in synchronization with the film sandwiched in the thickness direction. . In addition, since the second clamping / conveying mechanism can change the clamping force according to the change in the conveyance speed, for example, since the tensile force is not generated in the film at the main conveyance speed, the clamping force is reduced and the rapid conveyance speed is set. At least until the film is cut and separated, the clamping force is increased so as not to cause slipping, and the clamping force is reduced after cutting and separation. it can. As a result, it is possible to reduce the load due to the clamping force on the film.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a perspective view for explaining an outline of a process of stacking and packaging a work for each unit stacking unit in an integrated packaging machine including a film transport device according to an embodiment of the present invention. FIG. 2 is a perspective explanatory view in the A viewing direction of FIG. 1 for explaining a schematic configuration of the film transport apparatus according to the embodiment of the present invention.
The integrated packaging machine 1 shown in FIG. 1 is a unit unit in which a rectangular parallelepiped box (hereinafter simply referred to as a box) b such as a tissue box, for example, is arranged in close contact with an appropriate number of pieces, for example, 5 pieces. For example, the integrated unit B is a device that is packaged with a packaging material such as a film f obtained by processing plastic into a strip shape.
In the packaging process by the integrated packaging machine 1, the boxes b that are sequentially manufactured are first arranged in the same direction and conveyed in the same direction, and then conveyed by the accumulation conveyance device 2, and then adjacent boxes b are separated from each other by a predetermined gap in the conveyance process. After being opened and separated, the integrated unit B is formed by bringing them into close contact with each other. Then, the integrated unit B is sent upward.
On the other hand, in the packaging machine 3, a film f such as a thin soft plastic film formed of polyethylene or the like is used. ₀ Is wound around a roll 4 and this film f ₀ From the roll 4, the film cutting device 5 cuts perforations at predetermined lengths. Then, the cut film f is cut by the cut while being transported by the film transport device 10 according to the embodiment of the present invention, and the cut film f is transported to the elevator area 14. Therefore, the ascending integrated unit B is applied from below and wrapped in a cylinder, and the ends are sealed by thermocompression bonding or the like.
[0016]
The film conveying apparatus 10 of this embodiment is demonstrated.
As shown in FIG. 2, the film transport apparatus 10 includes a loading conveyor 11 (surface support transport means), sandwiching conveyors 12 and 12 (side transport means), and rapid feed sandwich conveyors 13 and 13 (variable speed transport means). Become.
The film f conveyed to the film conveying apparatus 10 has a width W _f The film cutting device 5 has a cut f at a predetermined position. _p Is provided. Break f _p Is formed in a perforation shape by, for example, cutting holes that are intermittent in the width direction of the film f. In this embodiment, the film tip f _f Distance L from ₃ Film tip f at the position (pitch in the conveyance direction of the cut) _f Are provided substantially in parallel.
In order to support the lower surface side of the film f, the loading conveyor 11 has a width W at an intermediate portion in the conveyance width direction. _B (However, W _B <W _f ) And a transport mechanism using an endless belt capable of transporting the film f in a placed state. The transport speed of the loading conveyor 11 is at least a predetermined main transport speed V ₁ Can be started and stopped at the appropriate timing.
[0017]
Each of the sandwiching conveyors 12 and 12 includes an endless belt pair of an upper conveyor 12A (first sandwiching and transporting mechanism) and a lower conveyor 12B (first sandwiching and transporting mechanism). It is provided on the left and right and is within the width of the film f placed on the placement conveyor 11. Then, the film f is sandwiched in the thickness direction (vertical direction) of the film f on the same plane as the transport surface of the mounting conveyor 11, and transported in synchronization with the start, transport, and stop in the same direction as the mounting conveyor 11. It is possible to do. That is, the transport speed is set to a predetermined main transport speed V ₁ Can be transported in synchronism with.
As for the upstream position of the sandwiching conveyors 12 and 12, the upstream end portions of the lower conveyor 12B and the loading conveyor 11 are aligned at substantially the same position so that the film f can be conveyed at the same timing as the loading conveyor 11. ing. On the other hand, the upstream side end of the upper conveyor 12A is a distance L on the downstream side that is slightly separated from the upstream side end of the lower conveyor 12B. ₄ It is arranged at the position.
For this reason, the film f has a distance L on the loading conveyor 11 and the lower conveyor 12B. ₄ After being placed and conveyed only, both sides are sandwiched and conveyed by the upper conveyor 12A and the lower conveyor 12B.
The downstream position of the sandwiching conveyors 12, 12 is such that the downstream end of the loading conveyor 11 is a distance L from the downstream end of the lower conveyor 12B. ₁ They are arranged so as to protrude only to form a convex shape in plan view. Further, the downstream end of the upper conveyor 12A has a distance L ₂ Only the lower conveyor 12B extends to form an extended conveying portion 12E.
[0018]
The quick-feeding and sandwiching conveyors 13 and 13 each include an endless belt pair of an upper-side quick-feeding conveyor 13A (second holding and transporting mechanism) and a lower rapid-feeding conveyor 13B (second holding and transporting mechanism). It is arranged close to the conveying direction with respect to the upper conveyor 12A and the lower conveyor 12B so that f is smoothly transferred. For this reason, a part of the upstream side of the upper rapid transporting conveyor 13A is arranged so as to overlap above the lower conveyor 12B in the extended conveying section 12E.
The upper express conveyor 13A located on the extended conveying portion 12E is slightly inclined from the upstream side to the downstream side so that the film f can be gently guided downward even when the film f rolls up. A wedge-shaped gap that narrows from the upstream side to the downstream side is formed between the lower conveyor 12B and the lower conveyor 12B. And when the film f leaves the extended conveyance part 12E, it is set as the structure clamped reliably by the rapid-feed clamping conveyor 13. FIG.
The quick-feed sandwiching conveyor 13 starts and stops at an appropriate timing, and at least the main transport speed V ₁ And higher rapid transfer speed V ₂ It is a variable speed transport mechanism that can be driven by.
[0019]
Next, with reference to FIGS. 3-6, the detailed structure of the film conveying apparatus 10 is demonstrated.
FIG. 3 is an explanatory plan view of the film transport apparatus 10. 4 is a cross-sectional explanatory view taken along the line CC and DD in FIG. 3. FIG. 5 is a partially enlarged view of a portion E in FIG. FIG. 6 is a partially enlarged view of a portion F in FIG. In FIG. 3, since the overlapping of the members in the vertical direction becomes complicated, the upper and lower members are appropriately omitted. The upper side in the figure mainly shows members related to the lower conveyor 12B and the lower rapid conveyor 13B, and the lower side in the figure mainly shows members related to the upper conveyor 12A and the upper rapid conveyor 13A.
[0020]
As shown in FIG. 3, the loading conveyor 11 has a belt 11a made of, for example, synthetic rubber or synthetic resin, which can hold the loaded film f with a frictional force and can be conveyed in the horizontal direction. It is wound around driving rollers 11c and 11c and a driving roller 11b having substantially the same width as the belt 11a provided on the downstream side. The driving roller 11b is provided on the upper side of the intermediate portion in the conveying direction of the belt 11a, and is configured to transmit the rotational force by the shaft 30. These drive rollers rotate the belt 11a without slipping and accurately transmit the rotation of the shaft 30 to the belt 11a. In order to wind an appropriate amount of belt 11a around the driving roller 11b, tightner rollers 11d and 11d are provided in the vicinity of the driving roller 11b.
The shaft 30 is rotatably supported by conveyor frames 17 and 17 that support the loading conveyor 11, and further traverses the upper conveyor 12 </ b> A disposed in the left and right of the conveyance direction (downward and upward in FIG. 3). The left side plate 16A and the right side plate 16B provided on the outside are rotatably supported, and are connected to a drive motor 20 for rotating the shaft 30 on the right outside of the right side plate 16B.
[0021]
In the lower conveyor 12B, the lower belt 12d has belt pulleys 12b and 12b provided on the upstream side and the downstream side, and a driving pulley P located in an intermediate portion thereof. ₃ Wrapped around. Drive pulley P ₃ Is fixed on the shaft 30 so as to rotate in synchronization with the rotation of the drive motor 20. In order to secure the amount of winding, the drive pulley P ₃ The belt tighters 22 and 22 are arranged in the vicinity. Further, the belt pulley 12b is rotatably fixed on the shaft studs 12c erected on the inner side in the width direction of the right side plate 16B and the left side plate 16A (see the upper side in FIG. 3).
The material of the lower belt 12d is the drive pulley P on the inner peripheral side. ₃ A material such as synthetic rubber or synthetic resin that can be nipped and conveyed by having an appropriate friction with the film f on the outer peripheral side without causing slippage can be employed.
[0022]
The upper conveyor 12A includes belt pulleys 12b and 12b provided on the upstream side and the downstream side, and a driving pulley P located at an intermediate portion thereof. The upper belt 12a is different in length only from the lower belt 12d. ₁ Wrapped around. Drive pulley P ₁ In the vicinity of the belt tensioners 22, 22 are provided.
Drive pulley P ₁ Is fixed to the tip of a shaft 31 rotatably supported by the left side plate 16A and the right side plate 16B. ₁ Is provided (see the lower side of FIG. 3). Gear G ₁ Is a gear G fixed on the shaft 30 outside the respective side plate. ₃ And the rotation speed of the shaft 30 is transmitted to synchronize the peripheral speeds of the upper belt 12a and the lower belt 12d. For example, drive pulley P ₁ , P ₃ Pulley diameter and gear G ₁ , G ₃ The number of teeth is the same.
[0023]
As shown in FIGS. 4 and 5, an abutting roller mechanism 25 (clamping assisting means) is provided between the upper conveyor 12A and the lower conveyor 12B.
The abutting roller mechanism 25 includes an abutting roller 25b and an abutting roller 25a provided on the inner peripheral side of the lower side of the upper belt 12a and the upper side of the lower belt 12d, respectively.
The abutting roller 25b is fixed to the upper conveyor frame 23 fixed to the left side plate 16A and the right side plate 16B via a fixing bracket 25e, and is applied to the upper belt 12a so that the lower side of the upper belt 12a maintains a predetermined height. It is attached and rotates as the upper belt 12a travels.
The abutting roller 25a is provided on an arm 25d extending obliquely downward from the rotation support shaft 25c of the abutting roller 25b, and the lower belt 12d is moved to a position where the inner peripheral upper side of the lower belt 12d is pushed up to a predetermined height. It is fixed so that it can rotate as it travels.
[0024]
The upper side of the lower belt 12d and the lower side of the upper belt 12a are kept substantially parallel on the upstream side of the abutting roller mechanism 25, and the positional relationship in the vertical direction of the belt pulleys 12b for tensioning each belt, the elasticity of the belt material. The film f is clamped with a clamping force determined from a coefficient, a friction coefficient, and the like. This clamping force is weak so as not to damage the thin and soft film f.
Further, the upper side of the lower belt 12d and the lower side of the upper belt 12a are sandwiching the film f with the same weak clamping force on the downstream side of the abutting roller mechanism 25, or the film thickness toward the downstream side. The film f is nipped with a slight gap in the vertical direction, and the film f is placed and conveyed by the frictional force with the upper side of the lower belt 12d. Therefore, the film tip f _f When a tension of a certain level or more is applied in the transport direction, the film f can be extended or displaced in the transport direction on the lower belt 12d.
[0025]
On the other hand, in the vicinity of the abutting roller mechanism 25, as shown in FIGS. 5A and 5B, the lower belt 12d and the upper belt 12a are formed on the film f by the abutting roller 25a on the upstream side of the abutting roller 25b. It is curved in an upward convex shape with the pinch held between them. Accordingly, the clamping force increases in the region sandwiched between the abutting rollers 25a and 25b, and even if the downstream film f is subjected to tension, it is balanced by the frictional force between the upper belt 12a, the lower belt 12d and the film f. As a result, the downstream tension is not transmitted to the upstream film f of the abutting roller mechanism 25.
[0026]
In FIG. 5, the size of the upper convex shape of the belt by the abutting roller mechanism 25 is exaggerated for easy viewing. In fact, the break f _p Therefore, the tension required for separation is small, and the clamping force of the abutting roller mechanism 25 may be small. Therefore, in actuality, the amount of protrusion is very small, and is not the amount of bending that leads to, for example, undulation or wrinkling of the film f.
[0027]
In such a configuration, the main transport speed V is provided downstream of the abutting roller mechanism 25. ₁ When the film f is pulled at a higher speed, the tension of the film f increases on the downstream side of the abutting roller mechanism 25, and the film f tries to stretch and deform sequentially. At this time, the cut f _p If there is an elongation deformation, the break f _p It is generated in a concentrated manner, and cutting and separation start from there.
On the other hand, the abutting rollers 25a and 25b rotate in the conveying direction while being pressed by the belt, respectively. ₁ The conveyance is continued. Further, since the tension is not transmitted on the upstream side of the abutting roller mechanism 25, the film f is not deformed or displaced.
[0028]
The fixed bracket 25e is slidably attached to a slide hole 23a which is a long hole parallel to the transport direction of the film f provided on the upper conveyor frame 23. FIG. 5B shows a state in which the abutting roller mechanism 25 is slid along the slide hole 23a from the position shown in FIG. 5A to the downstream side.
The fixed bracket 25e may be moved manually, but it is preferable that the fixed bracket 25e can be automatically moved according to the size of the film f to be cut. If it does so, even if the size of a workpiece | work is not uniform, for example at the time of packaging, since the size of the film f can be changed according to the size, there exists an advantage that productivity can be improved.
[0029]
The lower express conveyor 13B has belt pulleys 13b and 13b on the upstream side and downstream side, and a driving pulley P near the lower side of the upstream belt pulley 13b. ₄ And the lower belt 13d is stretched in the conveying direction. Each drive pulley P ₄ Is connected to a shaft 32 rotatably supported by the left side plate 16A and the right side plate 16B, and a speed reduction mechanism 33 comprising, for example, a timing pulley and a timing belt is provided on the shaft 32 extended to the outside of the right side plate 16B. Via the drive motor 21. Further, the shaft 32 between the speed reducing mechanism 33 and the right side plate 16B has a gear G for transmitting the rotation to the upper rapid conveyor 13A. ₄ Is fixed.
[0030]
The drive motor 21 is a variable speed motor that can be controlled at various timings by the control means 21a to start, stop, and change the conveyance speed. As such a motor, for example, a DC or AC servo motor that allows easy target value control can be suitably employed.
The drive motor 21 has at least a main transport speed V ₁ And sudden transfer speed V ₂ Can be switched as necessary, but it is more preferable if acceleration and deceleration control can be performed during that time. Also, the rapid transport speed V ₂ Is more preferable since it can be conveyed quickly corresponding to films f of various strengths.
[0031]
A plurality of shaft studs 13f with a predetermined pitch are set on the pulley bracket 18 between the belt pulleys 13b and 13b that stretch the lower belt 13d, and a movable pulley 13e that can rotate around the shaft is provided at the tip thereof. It is provided and can contact the inner peripheral portion of the lower belt 13d.
The pulley bracket 18 can be moved in the vertical direction by connecting an elevating mechanism 19 to the lower end side thereof. When the pulley bracket 18 is positioned on the upper limit side, the movable pulley 13e is in contact with the lower belt 13d so as to push it upward, and when the pulley bracket 18 is in the neutral position, the upper surface of the lower belt 13d is kept horizontal. When the movable pulleys 13e are disposed and the pulley bracket 18 is positioned on the lower limit side, the movable pulleys 13e are in a state of being separated from the lower belt 13d.
[0032]
Such an elevating mechanism 19 may be configured in any way, but in this embodiment, as an example, elevating mechanisms 19 and 19 formed of a rotary solenoid that performs a rotational motion of a predetermined angle by a predetermined signal are connected to a pulley by a pin 19b. The structure connected with the bracket 18 so that rotation is possible is employ | adopted. Then, the entire position of the pulley bracket 18 can be changed by moving the pulley bracket 18 along the diagonally downward direction as shown by the arrows in FIG. Reference numeral 19 a is a rotating shaft of the lifting mechanism 19.
[0033]
The upper rapid conveyor 13A has belt pulleys 13b and 13b arranged at an upper position substantially corresponding to the belt pulleys 13b and 13b of the lower rapid conveyor 13B, and a drive pulley P further upstream of the upstream belt pulley 13b. ₂ And the upper belt 13a is stretched. Drive pulley P ₂ Is positioned close to the downstream end of the upper conveyor 12A in the conveying direction, and the driving pulley P in the vertical direction. ₂ And the upstream belt pulley 13b are arranged in a positional relationship such that the upper belt 13a stretched downward is slightly inclined upward from the downstream side toward the upstream side.
Each drive pulley P ₂ Is fixed to a shaft 31 rotatably supported by the left side plate 16A and the right side plate 16B, and a gear G is disposed outside the left side plate 16A and the right side plate 16B of the shaft 31. ₂ Are connected. Gear G ₂ Is the drive pulley P ₄ Gear G to rotate in synchronization with the rotation of ₄ Are engaged. Drive pulley P ₂ A belt tighter 22 is provided in the vicinity of the upper side.
[0034]
Between the belt pulleys 13b and 13b, backup pulleys 13g are provided at a predetermined pitch on the inner periphery of the lower side of the upper belt 13a so that the lower side of the upper belt 13a maintains straightness in the transport direction. The backup pulley 13g is rotatably fixed to a shaft stud 13c provided upright on the inner side of the left side plate 16A and the right side plate 16B.
The backup pulleys 13g are arranged in a zigzag position in the transport direction so as not to face the movable pulleys 13e in the vertical direction.
[0035]
As shown in FIG. 3, the film between the loading conveyor 11 on the downstream side of the loading conveyor 11 and the quick-feed sandwiching conveyors 13, 13 is substantially the same height as the conveying belt surface on the upper side of the loading conveyor 11. Bar-shaped guides 15 for supporting f from the lower surface side are provided.
The elevator area 14 is sandwiched between the guides 15 and 15 so that the elevator 24 on which the integrated unit B is placed can be moved up and down at an appropriate timing.
[0036]
Next, operation | movement of the film conveying apparatus 10 which concerns on embodiment of this invention demonstrated above is demonstrated.
FIG. 7 is an explanatory cross-sectional view for explaining the operation of the film transport apparatus 10 according to the embodiment of the present invention along a time series. FIG. 8 is an explanatory plan view corresponding to FIG.
As shown in FIGS. 7A and 8A, the film f ₀ Is fed by the feeding rollers 8a and 8b (see FIG. 4), the film leading edge f _f Passes through the film cutting device 5 to each other and the main transport speed V ₁ A conveying force is applied from the lower surface side by the loading conveyor 11 and the lower conveyors 12B, 12B synchronized with the above. Soon, film tip f _f Are transported by sandwiching both ends in the width direction between the upper conveyors 12A and 12A and the lower conveyors 12B and 12B. At this time, the intermediate portion in the width direction of the film f is supported by the mounting conveyor 11 so that it does not sag from the lower surface side due to its own weight or the like.
Therefore, it is transported while forming a stable plane without being turned up or wrinkled during transport.
Since the upper conveyor 12A and the lower conveyor 12B are synchronized with each other in transport speed, the film f is not subjected to a sliding load in the transport direction. Further, since no slack or the like occurs in the intermediate portion, the force for pulling the film f in the width direction does not act, and the holding force in the vertical direction is small, so the load due to the pinching on the film f is light. Therefore, it can be transported without leaving rubbing marks or pressing marks.
[0037]
Film tip f _f Is a predetermined length L determined by the size of the package (workpiece) ₃ The main transport speed V ₁ A rotary cutter 5b that rotates in synchronization with the film f ₀ In the width direction of the f _p Is formed. Since the rotary cutter 5b is rotated in the direction of the arrow shown by the cutter holder 5a, the film f ₀ The break f _p There is no resistance that separates the two.
Therefore, cut f _p The film f in front of the film f ₀ At the same time, it is transported downstream (see FIGS. 7B and 8B).
[0038]
And the film tip f _f Reaches the downstream end of the upper conveyor 12A and enters the section of the extended conveying section 12E. At this time, the upper rapid conveyor 13A and the lower rapid conveyor 13B ₁ It is operating in sync with. The film f is released from the side holding state only for a short time passing through the extended conveying portion 12E. ₁ The upper rapid feed conveyor 13A moving at the _f Even if it gets drunk, it is pushed back from above immediately. Further, since the loading conveyor 11 is extended on the lower surface side, the lower surface of the film f is supported in a substantially planar shape, and the film f droops downward rapidly even after leaving the lower conveyor 12B. Nor. For this reason, the film f is smoothly transferred to the quick-feed and sandwiching conveyor 13 while substantially maintaining the planar conveyance state.
[0039]
Film tip f _f Further advances, enters the parallel conveyance region 11E, is sandwiched by the quick-feed and sandwiching conveyor 13 on both sides, and is supported by the loading conveyor 11 in the widthwise intermediate portion, and the main transport speed V ₁ Will continue to be transported.
And the film tip f _f Is located downstream of the parallel transport area 11E and has a break f _p When the speed exceeds the abutting roller mechanism 25, the transport speed of the quick-feed sandwiching conveyor 13 is set to the rapid transport speed V. ₂ Switch to.
At the same time, the lifting mechanism 19 is operated to move the movable pulley 13e to the upper limit position. At this time, as shown in FIG. 6B, the clamping surfaces of the upper belt 13a and the lower belt 13d are sandwiched between the movable pulley 13e and the backup pulley 13g, and the clamping force is increased.
[0040]
At this time, the sandwiching portion of the film f is strictly wave-shaped, but the illustration is exaggerated. In the present embodiment, the number of movable pulleys 13e and backup pulleys 13g forming a staggered pattern is increased to, for example, 7 to 8, respectively. Uneven deformation is reduced so that the clamping force can be increased as a whole.
Further, the position of the abutting roller mechanism 25 in the transport direction is determined based on information on the size of the film f to be cut, and the like. _p Depending on the position of the film tip f _f When f reaches the above position, the break f _p Move so that it is close to the upstream.
[0041]
Accordingly, the film f is pulled downstream at the side in the width direction at the moment when the conveyance speed difference is generated between upstream and downstream across the cut. Then, the tension is transmitted to the film f, and the elongation deformation becomes a break f. _p Concentrate on the break f _p Is cut and separated from the film f. At this time, when the tensile force acts from the side of the film f, the cut f _p There is an advantage that it is easily cut off.
[0042]
After the separation of the film f, the rapid feed sandwiching conveyor 13 ₂ Continue to carry on. And the film f is conveyed on the elevator area 14 within a short time, and conveyance is stopped in a predetermined position. Most of the conveyance during this time is performed in a state where the loading conveyor 11 is not present on the lower surface of the film f, so that the film f tends to hang down due to gravity. Therefore, it is very convenient that the lifting mechanism 19 can carry the quick-feeding conveyor 13 while increasing the holding force.
However, depending on conditions such as the size of the film f, if it can be transported without increasing the clamping force so much, the position of the movable pulley 13e is lowered, for example, as shown in FIG. May be transported so as to maintain a strictly flat surface.
[0043]
In parallel with this conveyance, the integrated unit B is raised by the elevator 24. Then, at the timing when the lower surface of the film f substantially contacts the integrated unit B, the lifting mechanism 19 is operated to move the movable pulley 13e to the lower limit position and release the clamping force. Therefore, the film f is pulled out inward in the width direction as the upper surface of the integrated unit B rises. Then, it is transported to the next process such as cylinder folding.
[0044]
As described above, according to the film transporting apparatus 10 according to the embodiment of the present invention, the planar conveyor is maintained even by the thin and soft film f by transporting the placing conveyor 11 and the sandwiching conveyor 12 in synchronization. It can be transported without scratches, wrinkles, or bending.
And the main transport speed V ₁ By moving the film f by providing a parallel transport region 11E with the mounting conveyor 11 in the transport direction, the quick-feed sandwiching conveyor 13 that can be tuned to the transporting direction is transferred to the rapid transport means while maintaining the previous transport state. Can do.
Further, after the leading edge of the film f has exited the parallel conveyance area 11E, the rapid feeding sandwiching conveyor 13 is moved to the rapid conveyance speed V. ₂ By switching to, the load due to slip conveyance with the loading conveyor 11 and the sandwiching conveyor 12 is reduced in terms of time and area, so that the film f can be conveyed at high speed with almost no load. It becomes possible.
Moreover, a rapid continuous process can be formed without providing an intermittent feed process for temporarily stopping the conveyance.
Further, since the film f is not stretched or displaced in the upstream of the abutting roller mechanism 25, the film front end f of the film f to be cut next is used. _f In addition, the film surface is stable every time and is suitable for a continuous process.
[0045]
As a result, if such a film transport device is used in an integrated packaging machine, etc., it is possible to wrap with a sheet-like film cut in high quality without scratches, wrinkles, bends, etc. There is an advantage that can be done. In addition, since a thin and soft film can be employed, there is an advantage that inexpensive packaging is possible. Furthermore, since the film can be continuously conveyed at a high speed even if the film size is changed, it is possible to realize an integrated packaging machine that can flexibly cope with the size change and has high moving efficiency.
[0046]
In the above description, it is described that the film can be easily transported even if it is thin and soft. However, this does not mean that the film must have a predetermined thickness or less. Any thickness may be used as long as it can be wound around at least a roll, continuously conveyed, and cut and separated during conveyance.
[0047]
In the above description, the cut is described as having a perforation with intermittent cut holes. However, the shape and size of the cut holes may be any, and match the film. It may be suitable for cutting and separation. For example, according to this embodiment, until the film is cut and separated, both sides are conveyed in synchronization with the main conveyance speed while supporting the lower surface of the film. Easy to transport. As an extreme example, even if cut almost completely, it can be separated while being conveyed in the same manner.
[0048]
Further, in the above description, the loading conveyor 11 is extended downstream of the sandwiching conveyor 12 so as to be surely transferred to the quick-feed sandwiching conveyor 13 even if it is a thin and weak film, and the parallel transport region 11E. However, if the film has a certain degree of waist, instead of the loading conveyor 11, for example, the guide 15 may be extended upstream and the loading conveyor 11 may be retracted upstream. . By doing so, there is an advantage that the load on the film can be reduced since the friction with the mounting conveyor 11 is further reduced when the rapid transporting conveyor 13 performs rapid transport.
[0049]
In the above description, the belts have been described as not having teeth, but it is needless to say that, for example, a timing belt can be suitably employed.
[0050]
Further, in the above description, the example has been described in which the clamping assist means for partially enhancing the clamping force is provided. However, if the film is not loaded, the first clamping conveyance mechanism is pressurized in the clamping direction at the time of synchronous conveyance. For example, on the downstream side including the cut, the pressure in the clamping direction is alleviated and the clamping force is partially relaxed when the second clamping mechanism is rapidly transported. It may be by means.
[0051]
In the above description, the side conveyance means and the rapid conveyance means have been described as examples of the first and second nipping and conveying means for nipping the film, respectively. Other transport mechanisms such as a suction transport mechanism can also be employed. In that case, it is possible to cause slipping when switching the conveyance speed by appropriately setting the suction timing and the suction position.
[0052]
In the above description, an example of a stacking packaging machine has been described as a suitable example for using the film transport apparatus. However, this is an example, and the application is not limited thereto. These devices may be combined, or this device can be used alone.
[0053]
【The invention's effect】
As described above, according to the present invention, in a film transport apparatus, a thin, thin strip-shaped film is transported at a high speed to a predetermined position in a continuous process so that scratches, wrinkles, bending, etc. do not occur. There is an effect that it can be performed.
[Brief description of the drawings]
FIG. 1 is a perspective view for explaining an outline of a process of stacking and packaging a work for each unit stacking unit in an integrated packaging machine including a film transport device according to an embodiment of the present invention.
FIG. 2 is a perspective explanatory view in the A viewing direction of FIG. 1 for explaining a schematic configuration of the film transport apparatus according to the embodiment of the present invention.
FIG. 3 is an explanatory plan view of a film transport apparatus according to an embodiment of the present invention.
4 is a cross-sectional explanatory view taken along CC and DD in FIG. 3; FIG.
5 is a partially enlarged view of a portion E in FIG.
6 is a partially enlarged view of a portion F in FIG.
FIG. 7 is an explanatory cross-sectional view for explaining the operation of the film transport apparatus according to the embodiment of the present invention in time series.
FIG. 8 is an explanatory plan view corresponding to FIG. 7;
[Explanation of symbols]
f, f ₀ the film
f _p Break
V ₁ Main transfer speed
V ₂ Rapid transfer speed
1 Integrated packaging machine
3 Packaging machine
4 rolls
5b Rotary cutter
8a, 8b Feeding roller
10 Film transport device
11 Placement conveyor (surface support transport means)
11E Parallel transport area
12 Nipping conveyor (side transportation means)
12A Upper conveyor (first holding and conveying mechanism)
12B Lower conveyor (first nipping and conveying mechanism)
12E Extended conveying section
13 Rapid-feeding conveyor (variable speed transfer means)
13A Upper rapid conveyor (second clamping and conveying means)
13B Lower express conveyor (second nipping and conveying means)
13e Movable pulley
13g backup pulley
19 Lifting mechanism
21 Drive motor (servo control means)
23a Slide hole
25 Abutting roller mechanism (clamping assist means)

Claims (9)

A film transporting device that separates at the slit while transporting a strip-shaped film provided with a slit in the short width direction in the longitudinal direction,
A surface support transport means provided at an intermediate portion in the transport width direction orthogonal to the transport direction, supporting one surface of the film and transporting at a predetermined main transport speed;
Side transfer means that are respectively provided on the left and right in the transfer direction of the surface support transfer means and can be transferred in synchronization with the main transfer speed of the surface support transfer means;
Proximity to each downstream end of the side conveyance means is provided in the same direction as the side conveyance means, switching between the main conveyance speed and a rapid conveyance speed faster than the main conveyance speed. A film transport apparatus comprising: a variable speed transport unit capable of transport. The downstream end portion of the surface supporting and conveying means extends to the downstream side of the downstream end portion of the side portion conveying means, and a part of the variable speed conveying means is arranged in parallel on the left and right in the conveying direction. The film transport apparatus according to claim 1, further comprising a parallel transport region. The side conveyance means includes a first clamping conveyance mechanism that is tuned to each other by clamping the film in its thickness direction,
When the film is transported at the rapid transport speed by the variable speed transport means, the film can be slipped downstream from a predetermined position in the transport direction between the first clamping transport mechanisms. The film transport apparatus according to claim 1 or 2. The film transport apparatus according to claim 3, wherein a gripping auxiliary means for increasing a gripping force of the film is provided at the predetermined position of the first sandwiching and transporting mechanism. 5. The film transport apparatus according to claim 4, wherein the holding assist means is provided so that the arrangement position can be changed according to the transport direction pitch of the cut of the film. 6. When the variable speed conveying means is switched to the rapid conveying speed, the holding assist means is arranged in the middle portion of the first and second cuts from the leading edge of the film. The film conveyance apparatus as described in. At the downstream end of the side part conveying means, an extended conveying part is provided in which a part of the first holding and conveying mechanism is extended to the downstream side on one side of the film,
A part of the variable speed conveying means is arranged so as to be opposed to sandwich the film in the extended conveying portion, and the opposed distance is decreased from the upstream side toward the downstream side. The film conveyance apparatus in any one of Claims 3-6. The transport speed of the variable speed transport means is
While the leading edge of the film is in the parallel transport area, it is synchronized with the main transport speed,
It is controlled so that it may be changed to the said rapid conveyance speed, when the front-end | tip of the said film is conveyed more than predetermined distance from the said parallel conveyance area | region downstream. Film transport device. The variable speed conveying means includes a second nipping and conveying mechanism that nipping the film in its thickness direction and being driven in synchronization with each other and capable of changing a nipping force at a predetermined timing,
The film transport apparatus according to claim 1, wherein the sandwiching force is changed according to a transport speed of the second sandwich transport mechanism.

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