JP4841050B2 - Packaging device with stretched film - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a packaging apparatus using a stretched film.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as a packaging apparatus for packaging an object to be packaged with a plastic film, one described in Japanese Patent Publication No. 59-46845 is known.
The packaging device is arranged adjacent to the feeding device for receiving and feeding a package (a packaged body) and receives the package from the feeding device. A conveyor mechanism that is positioned and driven at substantially the same speed, a winding device that is capable of rotating (revolving) the film unwinding device along a frame surrounding the cargo and the conveyor mechanism, and a film unwinding device. It has a drive mechanism that rotates along the frame, a take-out conveyor device following the conveyor mechanism, and a film stretching device that stretches the film unwound from the film unwinding device.
[0003]
That is, by revolving the roll body of the film around the load being transported by the conveyor mechanism, the belt-shaped plastic film unwound from the roll body is polymerized in a part in the width direction. It is to make a cargo spirally wound.
By the way, Japanese Examined Patent Publication No. 59-46845 has no description about linking the driving of the feeding device, the conveyor mechanism, the drive mechanism for the film unwinding device, and the take-out conveyor device in the packaging device described above. It is presumed that each mechanism or device is driven by a separately provided motor, and each motor is controlled to be electrically tuned or is not tuned.
[0004]
[Problems to be solved by the invention]
As described above, it is difficult to perform synchronous control of a plurality of motors provided for a plurality of mechanisms and apparatuses having different structures. In addition, the mechanism and apparatus become complicated and large.
In addition, even though a motor is provided for each of the feeding device, the conveyor mechanism, the drive mechanism for the film unwinding device, and the take-out conveyor device, these are electrically tuned and controlled. If not, it is presumed that it is necessary to lower the transport speed (operation efficiency) in order to ensure the delivery of the load between each mechanism and apparatus.
[0005]
The present invention has been made in view of the above circumstances, and can easily maintain the synchronization of the operation without incurring the complexity and enlargement of the mechanism, the apparatus, etc. Another object of the present invention is to provide a packaging apparatus using a stretched film that does not cause any occurrence.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention has taken the following measures.
In other words, the stretched film packaging apparatus according to the present invention is provided with a carry-in part, a winding part, and a take-out part in this order, and the winding part has an upper surface as a support surface of the package body. A double-sided conveyor that synchronously conveys both the upper and lower support surfaces from the carrying-in part side to the take-out part side with the lower surface as the supporting surface of the stretched film, and a winding device that winds the stretched film around the packaged body including the double-sided conveyor have.
[0007]
Here, the double-sided conveyor and the winding device can be linked by a common drive mechanism.
And the drive conveyor linked with the drive mechanism of the said winding part is provided in the said extraction part.
Furthermore, the winding device is provided with a biaxially stretched portion that stretches the material film in the longitudinal direction and the width direction orthogonal to the longitudinal direction, and the biaxially stretched portions are provided close to each other in a parallel state. A pair of rollers is provided, and on the outer peripheral surface of each roller, protrusions and grooves are alternately provided along the axial direction, and the protrusions and the grooves are engaged with each other between the rollers. In addition, the material film is stretched between the two rollers in the form of a brush, and the pair of rollers can be interlocked by the driving mechanism of the winding portion.
[0008]
By providing such a biaxially stretched portion, it is possible to easily and freely adjust the stretch ratio in the longitudinal direction and the width direction as a stretched film.
Also in the carry-in part, a drive conveyor that is interlocked by the drive mechanism of the winding part can be provided.
The winding device of the winding part is independently rotatable in a coaxial manner with the first ring body, which is rotatably held around the packaged body conveyed by the double-sided conveyor. The second wheel body that is held, a first drive unit that rotationally drives the first wheel body, and a load generator that applies rotational resistance to the second wheel body may be included.
[0009]
In this case, on the first ring body, a film holding part that rotatably holds the roll body of the material film, and a material film fed out from the film holding part are stretched in the longitudinal direction and the width direction perpendicular to the longitudinal direction. A biaxially stretched part to be formed, a film developing part that widens the stretched film stretched in the biaxially stretched part in the width direction, and a feed part that feeds the stretched film are provided.
[0010]
Moreover, the input transmission part which transmits a driving force to a biaxial extension part shall be contact | abutted on the outer peripheral part of the said 2nd ring body.
That is, a differential gear mechanism is configured by the first drive unit, the first ring body, the input transmission unit of the biaxial extension unit, the second ring body, and the load generator .
The winding section is provided with an inclined roller inclined at a predetermined angle in order to guide the drawing film to be fed out at an angle suitable for spirally winding the stretched film on the package on the double-side conveyor. Is preferred.
[0011]
By providing this inclined roller, wrinkles and kinks can be prevented from occurring in the stretched film, so that the wound state around the package can be made beautiful.
The winding unit can be provided with a plurality of winding devices along the conveying direction of the double-sided conveyor.
By doing in this way, even if it conveys a double-sided conveyor continuously, an extending | stretching film can be piled up and wound in multiple times (multiple layers) with respect to the to-be-packaged body.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG.1 and FIG.2 shows the whole about one Embodiment of the packaging apparatus 1 by the stretched film which concerns on this invention.
As shown in FIG. 3 as an example, the packaging device 1 is entirely covered by a cover 2 having a shape in which a horizontally-turned cylindrical body 2a is placed on a rectangular base 2b. On the downstream side, appropriate conveying means 3 and 4 such as a belt conveyor and a roller conveyor are connected and installed between predetermined processes.
[0013]
FIG. 4 shows an example of a package 5 packaged by the packaging device 1. The package 6 is covered with a plastic film 7 around the package 6. Is an arrangement in which a plurality of (three in the illustrated example) square thin box bodies 6 a made of white cardboard are aligned, and the plastic film 7 is arranged in the package body 6 so that each box body 6 a is aligned. The packaged body 6 is wound around the package 6 in a spiral manner along the direction.
[0014]
The packaged body 6 is not limited to a square thin box. For example, a half tray (a tray in which a plurality of bottles and the like are arranged vertically and horizontally and the feet of the bottles and the like are regulated) is used. Bottles, cans, bottles, etc., which are half or less than the height of the bottles, etc. but not having the full height of the bottles, etc. Long-form plates, bars, pipes, panels, automobiles, home appliances, garbage, paper, aluminum and steel cans, etc. Any article that is held and can be formed as a package that does not collapse by winding the film in a spiral shape is applicable.
[0015]
Needless to say, each box 6a is a body to be packaged as one by one.
In addition, when the plastic film 7 is melted at both ends of the package 6, the cut end is reduced in diameter because it is a stretched film, and the cut ends are welded and solidified.
The plastic film 7 is prepared by winding a belt-like one as a roll body, and is stretched in both the longitudinal direction and the width direction of the belt-like state at the stage of being wound around the packaged body 6. (Hereinafter referred to as “stretched film”).
[0016]
Then, as a wound state around the package 6, a part of the band shape in the width direction is polymerized by an appropriate amount (not shown).
Further, the stretched film 7 is superposed on the double helix so that the winding directions are opposite to each other along the spiral axis direction. That is, the stretched film 7 includes one that forms a first coating layer and one that forms a second coating layer.
[0017]
Then, with respect to the stretched film 7, one or a plurality of cut portions 8 are provided in parallel and close to each other along the spiral axis at a position corresponding to the side surface of the package 5.
In this embodiment, since the two cut-out portions 8 are provided, a strip-shaped tear piece 9 can be formed between the two cut-out portions 8.
[0018]
In this package 5, as shown in FIG. 5, there is no defective product X in which deformation such as whisker and slipping occurs due to the winding action (clamping force) of the stretched film 7, and each box 6 a A clean packaging state is obtained without becoming a defective product Y causing a twisted positional shift.
In FIG.1 and FIG.2, the said packaging apparatus 1 is provided with the carrying-in part 10, the winding part 11, and the taking-out part 12 in this order.
[0019]
First, the schematic configuration will be described. The carry-in unit 10 includes a drive conveyor 15 and a fall prevention means 16.
The winding unit 11 includes a double-sided conveyor 17, a winding device 18, and a misalignment prevention unit 19.
The takeout unit 12 includes a cutout forming unit 20, a drive conveyor 21, and a cutout unit 22.
[0020]
Among these, the winding part 11 will be described first.
FIG. 6 shows the winding portion 11 in a simplified manner so that it can be easily understood.
As apparent from FIG. 6, the winding unit 11 conveys the package body 6 while supporting the upper and lower surfaces of the package body 6 in a sandwiched manner by the double-sided conveyor 17 and the misalignment prevention means 19. On the other hand, during the conveyance, the roll body 25 of the stretched film 7 provided in the winding device 18 is revolved around the packaged body 6, and at this time, the stretched film 7 is fed out at the same time. The stretched film 7 is wound around the entire packaged body 6 including the prevention means 19.
[0021]
In the winding unit 11, the double-sided conveyor 17 is a combination of a main conveyor 30 and a sub-conveyor 31 that are vertically arranged so that the upper side becomes the main conveyor 30 and the lower side becomes the sub-conveyor 31.
The main conveyor 30 is an endless belt conveyor whose upper surface is a support surface 30a,
The packaged body 6 is conveyed from the carry-in part 10 side toward the take-out part 12 side.
[0022]
The sub conveyor 31 is an endless belt conveyor having a lower surface as a support surface 31a, and conveys the stretched film 7 in synchronization with the packaged body 6.
The positional deviation prevention means 19 is for preventing the positional deviation with respect to the package body 6 being conveyed on the double-sided conveyor 17.
A double-sided conveyor 36 in which the main conveyor 34 and the sub-conveyor 35 are vertically combined can also be used for the positional deviation prevention means 19.
[0023]
However, in the double-sided conveyor 36 used as the positional deviation prevention means 19, the one provided on the upper side is the sub-conveyor 35, and the one provided on the lower side is the main conveyor 34.
Accordingly, the lower surface of the main conveyor 34 becomes the pressing surface 34a, and the packaged body 6 is pressed and held from the carry-in portion 10 side toward the take-out portion 12 side, and the upper surface of the sub-conveyor 35 becomes the support surface 35a. Then, the stretched film 7 is conveyed while being synchronized with the packaged body 6.
[0024]
The double-sided conveyor 36 is provided with a biasing means 40 for biasing the pressing surface 34a of the main conveyor 34 toward the package 6.
In this embodiment, the urging means 40 employs a simple structure in which the shoe 41 brought into contact with the back side (upper surface) of the pressing surface 34a is pressed downward by an elastic material 42 such as a spring. In addition, various structures can be employed. For example, a sponge can be used as the elastic material 42, a tape such as Teflon can be used as the shoe 41, and the tape can be attached to the sponge, and a laminated type tape having elasticity and a small friction coefficient can be used. Furthermore, as the shoe 41, a plurality of free rollers may be used and biased by a spring or the like.
[0025]
The double-sided conveyor 36 used as the positional deviation prevention means 19 can be adjusted in the vertical position according to the size of the package 6. Also, the position can be adjusted to the left and right. By adjusting the position in the vertical and horizontal directions in this way, it is possible to cope with various sizes of packages to be packaged.
As shown in FIG. 7, the double-sided conveyor 36 used as the lower-side double-sided conveyor 17 and the misalignment prevention means 19 are both upstream (corresponding to the loading unit 10 side on the left side in FIG. 7). Are installed in a cantilevered state with the downstream side (corresponding to the extraction portion 12 side on the right side in FIG. 7) as a free end.
[0026]
Of these, the lower double-side conveyor 17 is supported by the support member 45 on the downstream side. As the support member 45, for example, a roller roller or a ball unit that can roll while being in contact with the support surface 31a of the stretched film 7 can be used.
As shown in FIG. 8, the lower double-sided conveyor 17 is preferably smaller than the width of the package 6 and at most equal to the package 6 at most. This is suitable for reliably winding the package body 6.
[0027]
In addition, the double-sided conveyor 36 of the misalignment prevention means 19 should be narrower than the lower-side double-sided conveyor 17 to simplify the structure, suppress the conveyance resistance, and easily wind the stretched film 7. This is suitable in terms of sex and the like.
As shown in FIGS. 2 and 14, the double-sided conveyor 36 of the misalignment prevention means 19 and the lower-side double-sided conveyor 17 are driven simultaneously by an interlocking transmission mechanism 48 (schematic diagram) and are driven synchronously. It has become.
[0028]
As shown in FIGS. 9 and 10, the winding device 18 is based on a fixed ring body 50 fixed to the in-device frame 49 (see FIGS. 1 and 2), and the first ring body 51 and the first ring body 51 around the fixed ring body 50. A two-wheel body 52 is rotatably provided, a first drive unit 53 is provided for the first wheel body 51, and a load generating device 54 is provided for the second wheel body 52. It has become.
[0029]
The 1st ring 51 and the 2nd ring 52 are coaxial, and the to-be-packaged body 6 conveyed by the above-mentioned double-sided conveyor 17 passes through these centers.
The first wheel body 51 and the second wheel body 52 are both formed as ring gears, and gear teeth are engraved on the outer peripheral surfaces thereof. The first ring body 51 is formed larger in diameter than the second ring body 52.
[0030]
The first drive unit 53 meshes the transmission gear 69 of the drive shaft 68 directly with or without the reduction gear 67 interposed (contacted) with the outer peripheral portion of the first wheel body 51. As shown in FIGS. 1 and 2, the drive shaft 68 can be rotationally driven from the driving unit 70 via the gear box 71.
[0031]
Therefore, by driving the prime mover 70, the first wheel body 51 can be rotationally driven as necessary.
The load generating device 54 includes a powder brake, a torque limiter, an electromagnetic brake, a motor, and the like. Essentially, the load generating device 54 is necessary for the second wheel body 52 via a reduction gear 64 meshed with the second wheel body 52. The rotation load (rotation resistance) of the degree according to is given.
[0032]
The load generator 54 preferably has a structure capable of adjusting the load intensity by remote operation (especially electrical control).
The first ring body 51 includes a film holding part 56, a biaxial stretching part 57, a guide roller 58, an input transmission part 59, a film developing part 60, a feed part 61, and an inclined roller 62. Yes.
[0033]
Further, the first wheel body 51 is provided with a counterweight 63 for adjusting the load balance with respect to the film holding portion 56 and the like so as to make the rotation smooth.
The film holding part 56 is a place that holds the roll body 25 of the stretched film 7 (a material film that has not yet been stretched in this roll state) 25 in a freely rotatable manner.
[0034]
The biaxially extending portion 57 has a pair of a first roller 73 and a second roller 74 that are provided close to each other in a parallel state.
As shown in FIG. 10, the first roller 73 and the second roller 74 are a 1/4 arc-shaped (see FIG. 9) mounting base 75 fixed to the first ring body 51, and a predetermined amount is attached to the mounting base 75. It is installed between the holding bases 76 having substantially the same shape that are opposed to each other with a space therebetween, and is rotatable.
[0035]
As shown in FIG. 11, protrusions 73a and grooves 73b are alternately provided on the outer peripheral surface of the first roller 73 along the axial direction thereof, and the outer peripheral surface of the second roller 74 is provided in the axial direction thereof. The protrusions 74a and the grooves 74b are alternately provided along the line. And these 1st roller 73 and the 2nd roller 74 are arrange | positioned so that each protrusion part 73a, 74a and groove part 73b, 74b may mesh | engage alternately.
[0036]
Therefore, when the material film fed out from the film holding unit 56 is wound between the rollers 73 and 74 in a brush shape, the material film is simultaneously spread in two directions, ie, the longitudinal direction and the width direction perpendicular to the longitudinal direction. It will be stretched.
In this case, the degree of stretching in the longitudinal direction and the width direction can be adjusted by adjusting the rotational speed ratio between the rollers 73 and 74, the pitch between them, and the like.
[0037]
In the case of the present embodiment, due to the arrangement relationship of both rollers 73 and 74 associated with the input transmission unit 59 described later, the material film fed out from the film holding unit 56 is first wound around the first roller 73 and then second. The roller 74 is hung around.
The input transmission portion 59 is for transmitting a driving force to the biaxial extension portion 57 described above, and is provided on the shaft center of the roller 73 penetrating the mounting base 75 and the first ring body 51 so as to be integrally rotatable therewith. The first transmission wheel 77 and the second transmission wheel 78 provided so as to be rotatable integrally with the shaft 74 of the roller 74 penetrating only the mounting base 75 are provided. While contacting each other, one of them (the first transmission wheel 77 in the illustrated example) is configured to contact the outer peripheral portion of the second wheel body 52 (see also FIG. 12).
[0038]
In the present embodiment, since the second wheel body 52 is a ring gear as described above, the first transmission wheel 77 and the second transmission wheel 78 are also a flat gear, and have a meshing transmission relationship in which these three members come into contact with each other without slipping. . However, it is not limited to this.
Further, the relationship between the number of teeth of the first transmission wheel 77 and the second transmission wheel 78 is set to 2: 1, so that the second transmission wheel 78 (that is, the second roller 78) is more than the first transmission wheel 77 (that is, the first roller 73). Since the roller 74) is set to rotate at a double speed, it is stretched in the longitudinal direction.
[0039]
The film development portion 60 is a so-called banana roller, and a short roller is connected in a rosary shape in the axial direction with respect to an axial center that is bent in a bow shape between the mounting base 75 and the sandwiching base 76. They are skewered and connected to each other.
Therefore, the stretched film 7 is wound around the film unfolding portion 60 in a state of being stretched by the biaxially stretched portion 57 to be the stretched film 7, so that the stretched film 7 is mainly spread in the width direction. Become.
[0040]
The feed unit 61 includes a drive roller 82 provided between the attachment base 75 and the sandwiching base 76 and a rotation drive unit 83 for the drive roller 82, and is in a drawing direction with respect to the stretched film 7. You can feed.
As the rotation drive unit 83, a structure in which a motor is directly connected may be employed, but in the present embodiment, the rotation of the second ring body 52 is used as shown in FIG.
[0041]
That is, the rotation shaft of the drive roller 82 is extended until the first ring 51 is penetrated, and a flat gear 84 that meshes and contacts the outer peripheral portion of the second ring 52 is provided at the tip.
Accordingly, when the second wheel body 52 is driven to rotate (note that the rotation driving of the second wheel body 52 will be described later), the feed unit 61 is simultaneously driven via the rotation driving unit 83. Become.
[0042]
In the present embodiment, a motor 85 is provided as an attachment, and a flat gear 86 provided on the motor 85 is configured to mesh with and contact with the outer peripheral portion of the second ring body 52.
Therefore, by rotating the motor 85 as necessary, the drive roller 82 can be rotated through the second wheel body 52. At this time, the second wheel body 52 can be rotated. At the same time, since the biaxial stretching portion 57 is also driven through the input transmission portion 59 described above, the stretched film 7 can be reliably and smoothly fed out while being simple in terms of structure and control. It becomes.
[0043]
The motor 85 is driven to rotate only when the stretched film 7 is pulled out (when the roll body 25 of the stretched film 7 is first held on the film holding unit 56). It is assumed that the rotation of the ring body 52 is not affected.
The inclined roller 62 is a roller that is rotatably mounted in a state inclined at a predetermined angle between the mounting base 75 and the sandwiching base 76, and passes through the feed unit 61 to the package 6 on the double-sided conveyor 17. The stretched film 7 is directed to an angle suitable for spirally winding the stretched film 7 around the package 6.
[0044]
As is clear from the above description, in the winding device 18, when the first drive unit 53 is driven, the first ring body 51 is first rotated, and the first ring body 51 is rotated to thereby hold the film. The biaxially extending portion 57, the guide roller 58, the input transmission portion 59, the film unfolding portion 60, the feed portion 61, and the inclined roller 62 as well as the portion 56 as a whole travel around the package 6 on the double-sided conveyor 17. Revolves around.
[0045]
At this time, since the biaxial stretching unit 57 is driven via the input transmission unit 59 and the feed unit 61 is driven to rotate, the material film is drawn from the film holding unit 56 and stretched by the biaxial stretching unit 57. In this way, the stretched film 7 is fed out toward the package 6 on the double-sided conveyor 17 while forming the stretched film 7.
On the other hand, when the biaxially extending portion 57 rotates together with the first ring body 51 as described above, the second transmission body 59 engages with the second wheel body 52 (engagement state with respect to the rotation direction) by the second transmission body 59. The ring body 52 is interlocked and rotated in the same direction as the first ring body 51.
[0046]
The rotational speed of the second wheel body 52 at this time can be adjusted by the degree of strength of the load by the load generator 54.
Therefore, the rotational speed of the biaxially extending section 57 and the feed section 61, that is, the speed at which the stretched film 7 is fed out toward the packaging body 6 on the double-sided conveyor 17 is adjusted according to the rotational speed of the second ring body 52. It can be done (it can be made zero).
[0047]
After all, the above-described first drive unit 53, the first ring body 51, the input transmission unit 59 of the biaxial extension unit 57, the second ring body 52, and the load generator 54 constitute a differential gear mechanism. It is what has been. The operating mechanism is not limited to a gear mechanism, and the operating mechanism may be configured by another transmission system such as a belt or a chain.
As shown in FIGS. 1 and 2, in the winding unit 11, two winding devices 18 are provided along the conveyance direction of the double-sided conveyor 17.
[0048]
Therefore, the stretched film 7 is wound twice in the process in which the package 6 is continuously conveyed on the double-sided conveyor 17.
In this case, the two winding devices 18 are provided so as to be symmetrical relative to each other in terms of structure and structure, and the rotation directions of the first ring body 51 and the second ring body 52 are reversed.
Therefore, as described above, the winding state of the stretched film 7 around the package 6 is such that the winding direction is opposite to each other along the spiral axis direction, and the first coating layer and the second coating layer are in two directions. It will be superimposed on the double helix.
[0049]
Next, the extraction part 12 (the cut formation part 20, the drive conveyor 21, and the cutout part 22) is demonstrated.
As shown in FIG. 13, the cut forming portion 20 has a structure in which the cut rotor 90 is pressed against the upper surface of the downstream end of the double-sided conveyor 36 (upper arrangement) provided as the misalignment prevention means 19.
[0050]
The cut rotor 90 is provided with radially projecting needles (not shown) on its outer peripheral surface, and is rotatable, and conveys the upper surface of the double-sided conveyor 36 (the support surface 35a for the stretched film 7). The cut-out portion 8 (described with reference to FIG. 4) is formed on the stretched film 7 as a break line while rolling by contact with the stretched film 7 to be performed.
[0051]
Further, the break rotor 90 may be provided not only on the upper side of the double-sided conveyor 36 but also on the lower side of the double-sided conveyor 17. This is because when the packaged body is heavy, it is not necessary to arrange the double-sided conveyor 36, and the stretched film 7 can be spirally wound while the packaged body 6 is placed and conveyed on the double-sided conveyor 17. That's fine. In this case, since the cut rotor 90 is pressed from the upper side of the package 5, the contact and separation between the film 7 and the needle are often not good, so the support member 45 provided with the cut rotor 90 below the double-sided conveyor 17. The roller roller may be charged or may be arranged separately.
[0052]
As shown in FIG. 7, a rotor receiving plate 91 is provided at a portion where the cut rotor 90 is provided, and the rotor receiving plate 91 extends from the upstream support portion of the double-sided conveyor 36. It is held via 92.
Therefore, the upper and lower spaces between the cut rotor 90 and the upper surface of the double-sided conveyor 36 (the support surface 35a for the stretched film 7) are either completely partitioned or partitioned so as to be held in a predetermined gap. It is made not to be damaged by contact interference with the cut rotor 90.
[0053]
The drive conveyor 21 and the cutout unit 22 are combined in a predetermined positional relationship.
The drive conveyor 21 is a belt conveyor, a rope conveyor, a chain conveyor, a roller conveyor, or the like (in the illustrated example, it is a belt conveyor). In short, the package 5 after winding the stretched film 7 is positively carried out. A U-shaped recess 96 is provided in the middle of the transport direction so as to correspond to the cutout 22.
[0054]
Further, upper feeding means 97 and 98 for preventing the package 5 from being lifted are provided above the front and rear portions of the recess 96.
These upper feed means 97 and 98 are constituted by a rope conveyor, a roller roller or the like, and can be interlocked with the drive conveyor 21 via the interlock belts 100 and 101 described above.
[0055]
These upper feed means 97 and 98 may be non-driven or are not necessarily required, and are preferably provided when the packaged body 6 is lightweight or easily slips. It is.
On the other hand, the cutout unit 22 is configured to allow the cutter 105 to move up and down on the drive conveyor 21.
[0056]
That is, the packaged body 6 is transported through the winding portion 11 while forming a predetermined gap between each packaging unit, and as a result, the stretched film 7 is wound. The subsequent package 5 is also carried into the cut-out portion 22 while maintaining this separation gap.
[0057]
And since the stretched film 7 is wound also in the division | segmentation gap | interval formed between the package bodies 5, in the part corresponding to this division gap | interval, it is only the stretched film 7 (it became the hollow state). A part will be formed.
Therefore, when the empty ring portion reaches the recessed portion 96 of the drive conveyor 21, the cutter 105 is lowered with the aim of the empty ring portion.
[0058]
The cutter 105 should just melt and melt | disconnect the empty ring part of the stretched film 7 by electrical resistance cutting methods, such as a nichrome wire. If this is the case, the diameter of the cut opening can be reduced simultaneously with the cutting of the stretched film 7, and the cut end can be welded and solidified. In addition to the electrical resistance cutting method, the cutter 105 may be a cutter such as a cutter knife. On the other hand, the cutting unit 22 may be a laser method.
[0059]
As is obvious from this, the recessed portion 96 provided in the drive conveyor 21 is a relief for preventing contact interference with the drive conveyor 21 when the cutter 105 is lowered most.
The cutter 105 is moved up and down by an endless chain 107 that is hung up and down. Since the hung form of the endless chain 107 is an inverted triangle, the cutting opening is parallel to the side surface of the package. Formed.
[0060]
Therefore, the vertical movement trajectory of the cutter 105 includes a V-shaped trajectory, and as a result, the cutter 105 descends and rises in synchronization with the transport speed of the drive conveyor 21.
By doing so, it is not necessary to stop the drive conveyor 21 and all the upstream conveyors while the cutter 105 is moved up and down, and a section gap to be held between the packages 6 is also possible. It can be set as narrow as possible (to the minimum length necessary for edge processing). Of course, it is not necessary to slow down the conveying speed of each conveyor.
[0061]
Although not shown, if the cutter 105 has a fulcrum at the lower part of the machine base and slides on a swinging bar connected to the endless chain 107, the cutter 105 is completely interlocked with the endless chain 107. Even if a nichrome wire or the like is used for the cutter 105, the necessary height can be moved up and down without turning the inverted triangular track. There is no need to consider.
[0062]
As already described with reference to FIG. 3, since the packaging device 1 is covered with the cover 2 as a whole including the cutout portion 22, the gas generated by melting the stretched film 7 spreads around the packaging device 1. There is nothing.
The cover 2 may be provided with a smoke exhaust unit 108 as necessary.
By these things, the surrounding work environment of this packaging apparatus 1 can be maintained in high quality, without being polluted with a strange odor.
[0063]
Next, the carrying-in part 10 (drive conveyor 15, the fall prevention means 16) is demonstrated.
As shown in FIG. 14, the drive conveyor 15 and the fall prevention means 16 are combined with each other in a predetermined positional relationship.
The drive conveyor 15 is a belt conveyor, a rope conveyor, a chain conveyor, a roller conveyor, or the like (in the example shown as a belt conveyor), and the main point is that the packaged body 6 is positively carried in. is there.
[0064]
The fall prevention means 16 has a pair of endless belt driving means 110 (see also FIGS. 1 and 2) provided in parallel to each other on both sides of the drive conveyor 15, and these endless belt driving means. In 110, the packaged body 6 is held in a sandwiched manner from both sides, and stable supply by the drive conveyor 15 is to be realized.
[0065]
In the present embodiment, as the fall prevention means 16, substantially the same as the “falling prevention clamping device” described in detail in Japanese Patent Application No. 11-101523 is employed. This pinching device for preventing overturning has a structure in which a number of fingers that exert a lateral biasing force are connected along an endless belt in a shape that is like a laundry scissor upside down.
Of course, the use of this is not limited. For example, a simple structure in which a pair of guide rails are provided on both sides of the drive conveyor 15 is possible, and it is more preferable if the position can be adjusted in accordance with the width dimension of the package 6. As can be seen from FIG. 1, the overturn prevention means 16 is arranged in a bridging manner on the drive conveyor 15 and the double-sided conveyors 17 and 36, so that a plurality of aligned solids 6a are moved in the width direction by the overturn prevention means 16. Since the conveyance is continued while being held from above and below by the double-sided conveyors 17 and 36 while being held from the left and right, it is delivered to the front, back, left and right without disturbing the alignment state.
[0066]
As shown in FIGS. 1 and 2, the drive conveyor 15 and the overturn prevention means 16 (see FIG. 14) of the carry-in unit 10 and the drive conveyor 21 (see FIG. 13) of the take-out unit 12 are double-sided conveyors in the winding unit 11. 17, a driving mechanism (see FIG. 10) for driving the winding device 18 and the misalignment prevention means 19, that is, a gear box 115 from a driving shaft 68 extending in the front-rear direction from the driving unit 70 via the gear box 71. It is designed to receive the driving force through.
[0067]
On the other hand, the combination of the reduction gear 67 and the transmission gear 69 of the first drive unit 53 is not limited to a gear system, and can be a belt transmission system, and the drive system of the first drive unit 53 of the winding unit 11 is different. By using an electric synchronous system using a motor, the winding pitch can be changed freely. Even if it is wound many times on the same packaged item, both ends are densely packed at the center. A suitable winding shape can be selected according to the shape of the packaged product, such as rough winding.
[0068]
That is, these are integrally interlocked by one driving part 70. Therefore, it is easy to synchronize the operation timing of each part, no deviation occurs, and the structure and control are extremely simple.
As is apparent from the above description, in the packaging device 1, when the package 6 is carried in while the carry-in unit 10 is held by the drive conveyor 15 and the overturn prevention means 16, the next winding unit 11 is positioned. Conveyance is continued while being held by the double-sided conveyor 36 and the lower-side double-sided conveyor 17 of the misalignment preventing means 19. The stretched film 7 including the double-sided conveyor 17 is wound twice in a spiral.
[0069]
Then, after the double-sided conveyor 36 and the lower-side double-sided conveyor 17 of the misalignment prevention means 19 are left as they are to form the package 5, the drive conveyor 21 and the upper feeding means 97, The conveyance is continued while being held at 98, and in this process, the formation of the cutout portion 8 by the cutout forming portion 20 and the cutting by the cutout portion 22 are performed and carried out of the apparatus.
[0070]
By the way, this invention is not limited to the said embodiment, It can change suitably according to embodiment.
[0071]
【The invention's effect】
As apparent from the above description, in the packaging device by stretching a film according to the present invention, compared preparative out section, a drive conveyor arranged to be engaged by the driving mechanism of the winding unit, and biaxially oriented portion of the Makizuke device Since it can be interlocked by the drive mechanism of the winding part, it is possible to easily maintain the synchronization of the operation without incurring complexity and enlargement of the mechanism and device, etc., and lowering the operation efficiency. Etc. can also be prevented.
[Brief description of the drawings]
FIG. 1 is a side view showing an embodiment of a packaging device using a stretched film according to the present invention in an easily understandable internal structure.
FIG. 2 is a plan view corresponding to FIG.
FIG. 3 is an external perspective view of the packaging device shown in FIG.
FIG. 4 is a perspective view showing a package obtained by the packaging apparatus according to the present invention.
FIG. 5 is a perspective view for comparing and explaining that the package obtained by the packaging apparatus according to the present invention is of high quality.
FIG. 6 is a perspective view showing the winding portion in a simplified manner so that it can be easily understood.
FIG. 7 is a side view showing the double-sided conveyor and the misalignment prevention means extracted.
FIG. 8 is an enlarged cross-sectional view taken along line AA in FIG.
FIG. 9 is an enlarged view taken along the line BB in FIG. 1;
10 is an enlarged sectional view taken along the line CC of FIG.
FIG. 11 is an enlarged view showing an extracted biaxially stretched portion.
12 is a view taken along line DD in FIG.
13 is an enlarged view taken along the line EE in FIG. 2;
14 is an enlarged view taken along the line F-F in FIG. 2;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Packaging apparatus 6 Packaged body 7 Stretched film 10 Carry-in part 11 Winding part 12 Unloading part 15 Drive conveyor of carry-in part 17 Double-sided conveyor 18 Winding apparatus 21 Drive conveyor of take-out part 25 Roll body 30a Support surface 31a of a package Stretched film support surface 51 First wheel body 52 Second wheel body 53 First drive unit 54 Load generating device 56 Film holding unit 57 Biaxial stretching unit 59 Input transmission unit 60 Film unfolding unit 61 Feed unit 62 Inclined roller 73 First Roller 73a First roller protrusion 73b First roller groove 74 Second roller 74a Second roller protrusion 74b Second roller groove

Claims (5)

A carry-in part (10), a winding part (11), and a take-out part (12) are provided in this order,
The winding part (11) has the upper and lower support surfaces (30a, 31a) as the support surface (30a) of the packaged body (6) and the lower surface as the support surface (31a) of the stretched film (7). A double-sided conveyor (17) that synchronously conveys from the carry-in part (10) side to the take-out part (12) side, and a winding that winds the stretched film (7) around the packaged body (6) including the double-sided conveyor (17) And the double-sided conveyor (17) and the winding device (18) can be interlocked by a common drive mechanism.
The take-out part (12) is provided with a drive conveyor (21) interlocked by the drive mechanism of the winding part (11) ,
The winding device (18) is provided with a biaxial stretching portion (57) for stretching the material film in the longitudinal direction and the width direction orthogonal to the longitudinal direction, and the biaxial stretching portion (57) is parallel. A pair of rollers (73, 74) provided close to each other in the state, and the outer peripheral surface of each roller (73, 74) has a protrusion (73a, 74a) and a groove along the axial direction. (73b, 74b) are provided alternately and the protrusions (73a, 74a) and the groove portions (73b, 74b) are engaged with each other between the rollers (73, 74). 74) and the pair of rollers (73, 74) can be interlocked by the drive mechanism of the winding portion (11). A packaging device using a stretched film characterized by the above.  2. The stretched film packaging apparatus according to claim 1, wherein the carry-in section (10) is provided with a drive conveyor (15) that is interlocked by a drive mechanism of the winding section (11).  The winding device (18) of the winding part (11) includes a first ring body (51) rotatably held around a packaged body (6) conveyed by the double-sided conveyor (17). ), A second wheel body (52) that is coaxially and independently held by the first wheel body (51), and a first drive section (53) that rotationally drives the first wheel body (51). And a load generator (54) for imparting rotational resistance to the second ring body (52), and a roll body (25) of a material film is rotated on the first ring body (51). A film holding section (56) that is freely held, a biaxial stretching section (57) that stretches the material film fed out from the film holding section (56) in the longitudinal direction and the width direction perpendicular to the longitudinal direction, Film unfolding part (60 And a feed portion (61) for feeding the stretched film (7), and an input transmission portion (59) for transmitting a driving force to the biaxially stretched portion (57). (52) is in contact with the outer peripheral portion, the first drive portion (53), the first ring body (51), the input transmission portion (59) of the biaxial extension portion (57), and the second wheel 3. The stretched film packaging apparatus according to claim 1, wherein a differential gear mechanism is constituted by the body (52) and the load generator (54). The winding section (11) guides the drawing of the stretched film (7) to an angle suitable for spirally winding the film (7) on the double-sided conveyor (17). packaging device according stretched film according to any one of claims 1 to 3, characterized in that the inclined rollers (62) are provided. The winding portion (11), to one of the claims 1 to 4, characterized in that the device with a plurality of turns along the conveying direction of the double-sided conveyor (17) (18) is provided The packaging apparatus by the stretched film of description.

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