JP2004059091A - Packaging equipment - Google Patents

Abstract

An object of the present invention is to provide a packaging device that can efficiently cover a cylindrical film on a work even if the work has a protrusion at an end thereof.
A packaging device includes a bucket conveyor for conveying a work. Above the bucket conveyor 230, a rotating turret 160 is provided. The rotating turret 160 is provided with a film suction tool 170 for sucking and holding the cylindrical film F. The cylindrical film F sucked and held by the film suction tool 170 is rotated together with the rotary turret 160 with the rotation of the rotary turret 160, and is slid while being swung to the work side W by the swing mechanism 210. The moving mechanism 190 moves the workpiece W side.
[Selection] Fig. 24

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a packaging device, and more particularly to a packaging device that covers a work with a tubular film and packs the work with the tubular film.
[0002]
[Prior art]
An example of a conventional packaging device that is the background of the present invention is disclosed in Japanese Patent Application Laid-Open No. 2000-168742. In the packaging device disclosed in Japanese Patent Application Laid-Open No. 2000-168742, the work is conveyed below the mandrel, and the cylindrical film is moved below the mandrel to cover the work with the cylindrical film. They are packaged in a tubular film.
Further, as a conventional packaging apparatus, there is a packaging apparatus that synchronously sends a work and a cylindrical film.
[0003]
[Problems to be solved by the invention]
However, in the conventional packaging apparatus disclosed in Japanese Patent Application Laid-Open No. 2000-168742, it is necessary to temporarily stop the work below the mandrel when covering the work with the tubular film, so that the work can be covered with the tubular film. Not very efficient.
On the other hand, in a conventional packaging device that synchronously sends a work and a cylindrical film, the work and the cylindrical film can be continuously sent, so that the efficiency of covering the work with the cylindrical film is high.
However, in any of the above-described conventional packaging apparatuses, when a protrusion is present at the end of the work, the cylindrical film may be caught on the protrusion, and the tubular film may not be properly covered on the work.
[0004]
Therefore, a main object of the present invention is to provide a packaging device that can efficiently cover a cylindrical film on a workpiece even if the workpiece has a projection at an end.
[0005]
[Means for Solving the Problems]
A packaging device according to the present invention is a packaging device that covers a work with a tubular film and wraps the work with the tubular film, wherein the work is transported by a work transport unit that transports the work and the work that is transported by the work transport unit. Film moving means for moving the cylindrical film to cover the cylindrical film, the film moving means, the work transfer speed of the work by the work transfer means in a direction parallel to the work transfer direction by the work transfer means. While moving the cylindrical film at substantially the same speed, the film is conveyed by the work transfer means while swinging the cylindrical film so that the opening of the cylindrical film faces the work being conveyed by the work transfer means. This is a packaging apparatus for moving a cylindrical film to a work side, thereby covering the work with the cylindrical film.
In the packaging apparatus according to the present invention, since the cylindrical film is placed on the work while the work is being conveyed, the cylindrical film can be efficiently placed on the work.
Moreover, in the packaging apparatus according to the present invention, the cylindrical film is moved at substantially the same speed as the work transfer speed in the direction parallel to the work transfer direction, and the opening of the cylindrical film is directed to the work side. The cylindrical film is moved to the work side while swinging the cylindrical film, so that even if there is a protrusion at the end of the work, the cylindrical film does not catch on the protrusion, and the cylindrical film is removed. Work piece can be put on well.
Therefore, in the packaging apparatus according to the present invention, the work can be efficiently covered with the cylindrical film even if the work has a protrusion at the end.
[0006]
In the packaging apparatus according to the present invention, for example, the film moving means is provided above the work transfer path by the work transfer means, and a portion approaching the work transfer path is in the same direction as the work transfer direction by the work transfer means. A rotating turret that rotates so as to be displaced, a film suction tool provided on the rotating turret and having a suction surface formed with a suction port for sucking a cylindrical film, and a direction parallel to a direction away from a center axis of the rotating turret. And a swing means for swinging the film suction tool in a direction substantially parallel to the rotation direction of the rotating turret.
In the packaging device according to the present invention, the sliding means includes a sliding member provided on the rotating turret so as to be slidable in a direction parallel to a direction away from the center axis of the rotating turret, and a sliding member attached to the sliding member. A roller, and a sliding guide member that contacts the sliding roller with the rotation of the rotating turret and slides the sliding member in a direction parallel to a direction away from the center axis of the rotating turret, A swinging member provided on the sliding member so as to be swingable in a direction substantially parallel to the rotation direction of the rotating turret, a swinging roller attached to the swinging member, and a swinging roller with the rotation of the rotating turret. A swinging guide member that contacts and swings the swinging member in a direction substantially parallel to the rotation direction of the rotary turret, and the film suction tool may be fixed to the swinging member.
[0007]
In the packaging apparatus according to the present invention, the suction surface of the film suction tool may be formed in a concave shape, and the suction ports of the film suction tool may be formed on both sides of the suction surface.
If the suction surface and the suction port of the film suction tool are formed in this manner, the cylindrical film approaches the suction ports on both sides of the suction surface in the film suction tool, so that the film suction tool sucks the cylindrical film. It will be easier.
[0008]
Further, in the packaging device according to the present invention, a connection port connected to the suction port of the film suction tool is formed in the rotary turret, and a suction box is formed so as to face a portion including the connection port of the rotary turret. A suction hole is formed in a portion facing the rotating turret, and a connection port of the rotating turret is connected to a suction hole of the suction box when the rotating turret is rotated within a predetermined range, and the rotating turret is out of the predetermined range. May be shut off from the suction hole of the suction box when being rotated.
By forming the connection port, the suction box, and the suction hole in this manner, when the rotating turret is rotated within a predetermined range, a suction force is generated at the suction port of the film suction tool, and the cylindrical shape is formed by the film suction tool. Film can be sucked.
[0009]
Furthermore, in the packaging device according to the present invention, the suction box is displaced, the position of the suction hole is changed, and the timing at which the connection port and the suction hole are connected with respect to the rotation of the rotary turret is changed. Adjustment means for adjusting the timing of sucking the film with the film suction tool may be provided.
With such an adjusting means, the timing for sucking the cylindrical film with the film suction tool can be adjusted optimally.
[0010]
Further, in the packaging apparatus according to the present invention, an auxiliary means for displacing a cylindrical film that is not sufficiently covered with the work toward the work side and sufficiently covering the work may be provided downstream of the work transfer path. .
If the auxiliary means is provided in this manner, a cylindrical film that is not sufficiently covered with the work can be sufficiently covered with the work.
[0011]
Further, in the packaging apparatus according to the present invention, a film transport means for transporting a tubular long film which is cut into a tubular film by cutting into a prescribed length; Cutting means for cutting the film into a cylindrical film.
By providing the film transfer means and the cutting means in this way, a tubular long film can be used as a tubular film.
[0012]
Further, the packaging apparatus according to the present invention may be provided with a perforation forming means for forming a perforation for tearing on the tubular long film in order to form a perforation for tearing on the tubular film.
By providing the perforation forming means as described above, a perforation for tearing can be formed on the tubular film.
[0013]
Further, in the packaging device according to the present invention, holding means for folding the tubular long film flat and winding it in a roll shape and holding it, and pulling out the long film held by the holding means from the holding means to form a tubular shape. A spreading means may be provided.
If the holding means and the spreading means are provided in this manner, a tubular long film that is folded flat and wound in a roll shape can be used as the tubular film.
[0014]
The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments of the present invention with reference to the accompanying drawings.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is an illustrative front view showing an example of a packaging device according to the present invention, and FIG. 2 is an illustrative side view of the packaging device. The packaging device 10 shown in FIG. 1 includes a transport conveyor 12 as a work transport unit. The transport conveyor 12 is for transporting the work W in the direction indicated by the arrow in FIG. 1 (to the left in FIG. 1).
[0016]
The work W includes a substantially cylindrical work body B, as shown in FIG. The upper part of the work body B is formed thinner than the middle part and the lower part. A projection P1 is formed on one side of the side of the work body B, and a projection P2 is formed on the side opposite to the one side of the side. A projection P3 is formed on the upper end of the intermediate portion of the work body B so as to go around the side surface thereof. Further, a plurality of projections P4, P4,... Are formed at an intermediate portion and a lower portion of the work body B so as to go around the side surfaces thereof at an interval vertically. When the work W is covered with a tubular film, the tubular film is likely to be caught on the projections P1 to P3.
[0017]
As shown in FIG. 1, a holding reel 20 is installed as a holding means near the upstream side of the conveyor 12. The holding reel 20 is for holding the cylindrical long film L folded flat and wound in a roll shape. This cylindrical long film L is formed, for example, by forming a perforation M for tearing as shown in FIG. 4 and cutting the film into a predetermined length at a portion indicated by a dashed line in FIG. This is a shrink film (heat-shrinkable film) that is placed on the work W and becomes a cylindrical film F that wraps the work W.
[0018]
As shown in FIG. 1, a frame 30 is installed near an intermediate portion of the conveyor 12. The frame 30 includes four columns 32a, 32b, 32c and 32d. These columns 32a, 32b, 32c and 32d are provided at an interval in front, rear, left and right.
[0019]
As shown in FIGS. 1, 2 and 6, a perforation forming unit 40 is provided above the right columns 32 a and 32 c in the frame 30. The perforation forming unit 40 is for forming a perforation M on the long film L in order to form a perforation M on the film F. As shown in FIG. 6, the perforation forming unit 40 has a perforation blade 42 corresponding to the perforation M for cutting. Therefore, by pressing the perforation blade 42 of the perforation forming unit 40 against the long film L, a perforation M for tearing is formed in the long film L.
[0020]
As shown in FIGS. 1 and 2, a rectangular plate 50 is fixed to the upper portions of the front columns 32a and 32b in the frame 30.
[0021]
On the upper part of the plate 50, as shown in FIGS. 1, 2 and 7, a folding device 60 is provided. The folding device 60 is for folding the long film L folded flat to take a folding habit of the long film L.
The folding device 60 includes a quadrangular prism-shaped main body 62 as shown in FIG. As shown in FIGS. 8 and 9, two substantially trapezoidal plate-like guide plates 64 are fixed to the upper portion of the main body 62 at an interval in the front-rear direction. The intermediate portions of the guide plates 64, 64 are bent so as to approach each other. The upper portions of the guide plates 64 are joined to each other. Two rollers 66, 66 are provided between the lower portions of the guide plates 64, 64 on both left and right sides thereof. In this case, the rollers 66, 66 are provided on the left and right sides of the main body 62 with an interval therebetween.
Further, two rollers 68, 68,... Are supported by a support member 70 at the intermediate portion of the main body 62 at both left and right sides with an interval. In this case, the two right rollers 68, 68 are provided at an interval in front and rear. Similarly, the two rollers 68 on the left side are provided at an interval in the front and rear.
Further, two substantially triangular guide plates 72 are fixed to the lower part of the main body 62 in the front and rear directions. In this case, when viewed from above, the guide plates 72, 72 are arranged on a plane orthogonal to the guide plates 64, 64. Two rollers 74, 74,... Are provided at front and rear ends of the guide plates 72, 72, respectively. In this case, two rollers 74, 74,... Are provided on both main surfaces of the guide plates 72, 72, respectively.
The main body 62 and the like of the folding device 60 are supported from below by two support members 76 and 76 and two support rollers 78 and 78 provided on the plate 50. In this case, the support members 76, 76 face the rollers 66, 66, respectively, and the support rollers 78, 78 face two rollers 68, 68, respectively.
[0022]
In order to fold the long film L folded flat by the folding device 60 and remove the habit of the long film L, the long film L is put on the main body 62 of the folding device 60 or the like, and the long film L is folded. The main body 62 of the folding device 60 and the like are put in the inside. In this state, part of the folded portion of the long film L is disposed outside the ends of the guide plates 64, 64 of the folding device 60, and the other portion is formed of the rollers 66, 66 and the support members 76, 76. The other portion is sandwiched between the rollers 68, 68,... And the support rollers 78, 78. In the long film L, a portion between the folded portions is disposed outside the ends of the guide plates 72. In this state, the long film L is transferred downward by a film feeder 80 described later. Thereby, the folding habit of the long film L is removed. In this case, the long film L is folded at a portion between the folded portions.
[0023]
As shown in FIGS. 1 and 7, a film feeder 80 is provided below the folding device 60 on the plate 50 as a film transport means. The film feeder 80 is for feeding the long film L by a predetermined length. The film feeder 80 includes two film feed rollers 82 and 84 as shown in FIG. These film feed rollers 82 and 84 are rotatably supported by the plate 50. Further, these feed rollers 82 and 84 are formed thick so that their intermediate portions contact each other. A motor 86 provided on the plate 50 is connected to one film feed roller 82. Accordingly, the long film L is sandwiched between the film feed rollers 82 and 84 of the film feeder 80, and the roller 82 is rotated by a predetermined number of rotations by a motor 86, so that the long film L is separated by a predetermined length. Can be sent.
[0024]
As shown in FIGS. 1 and 7, a cutter unit 90 is provided below the film feeder 80 on the plate 50 as cutting means. The cutter unit 90 is for cutting the folded tubular long film L into a tubular film F having a predetermined length. The cutter unit 90 has two cutting blades 92 and 94 as shown in FIGS. 7 and 11. One cutting blade 92 is fixed to the plate 50. The other cutting blade 94 is provided so as to be slidable left and right with respect to the plate 50. Further, the cutting blade 94 is connected to a motor 98 via a crank mechanism 96 so as to slide left and right. Therefore, the long film L can be cut into a cylindrical film F of a predetermined length by the cutting blades 92 and 94 by sliding the cutting blade 94 right and left by the motor 98 and the crank mechanism 96. .
[0025]
Below the cutter unit 90, a plate 100 is provided on the columns 32a and 32b on the front side of the frame 30 so as to be vertically slidable, as shown in FIGS. In this case, as shown in FIG. 13, two holders 102a, 102a are fixed to the back surface of the right side portion of the plate 100 at an interval vertically. These holders 102a, 102a are slidably provided on the column 32a. Similarly, two holders 102b, 102b are fixed to the back surface of the left side portion of the plate 100 at an interval vertically. These holders 102b, 102b are slidably provided on the support 32b.
[0026]
12, a holder 110 is fixed to the two columns 32a and 32b below the plate 100, as shown in FIG. At the center of the holder 110, a bearing unit 112 is fixed. As shown in FIGS. 12 and 13, a trapezoidal screw 114 is rotatably supported by the bearing unit 112. In this case, the trapezoidal screw 114 is supported so as to face up and down. A handle 116 is fixed to the lower end of the trapezoidal screw 114. The intermediate portion of the trapezoidal screw 114 is screwed into a female screw 120 formed on a holder 118 fixed to the plate 100, as shown in FIG. Therefore, by rotating the handle 116, the trapezoidal screw 114 is rotated, and the plate 100 together with the holder 118 is vertically displaced along the columns 32a and 32b, so that the vertical position of the plate 100 can be adjusted.
[0027]
As shown in FIG. 12, a rotating shaft 130 is rotatably supported by the plate 100. In this case, the rotating shaft 130 is supported by the plate 100 so as to protrude from the front side and the rear side of the plate 100 as shown in FIG. On the back side of the plate 100, a motor 132 is provided. A pulley 134 is fixed to the shaft of the motor 132. On the back side of the plate 100, a pulley 136 is also fixed to the rotating shaft 130. Further, a timing belt 138 is wound around these pulleys 134 and 136. Therefore, the rotating shaft 130 can be rotated clockwise by the motor 132 or the like when viewed from the front.
[0028]
On the front side of the plate 100, a hollow cylindrical suction box 140 is rotatably supported on the rotating shaft 130 as shown in FIG. The suction side of the blower 142 is connected to the suction box 140 via a hose 144. As shown in FIG. 15, an inverted C-shaped suction hole 146 is formed on the front of the suction box 140 from the upper side to the lower side through the right side. In this case, the suction hole 146 is formed on one circumference centering on the rotation shaft 130. A suction force is generated in the suction hole 146 of the suction box 140 by the blower 142 or the like.
[0029]
As shown in FIG. 12, a cylinder 150 is fixed to the front of the plate 100 on the upper left side of the suction box 140 as an adjusting means. The tip of the rod 152 of the cylinder 150 is fixed to the upper part of the suction box 140. Therefore, by expanding and contracting the rod 152 of the cylinder 150, the position of the suction hole 146 can be changed by rotating the suction box 140 about the rotation shaft 130.
[0030]
On the front side of the plate 100, a rotating turret 160 is fixed to an end of the rotating shaft 130, as shown in FIGS. The rotating turret 160 includes a disk-shaped central member 162 having the same size as the front surface of the suction box 140. The central portion of the central member 162 is fixed to the rotating shaft 130 so as to face the front of the suction box 140. Six rod-shaped members 164, 164,... Are radially fixed to the central member 162.
[0031]
In the central member 162 of the rotating turret 160, six connection ports 166, 166,... Are formed on the extension lines of the six rod-shaped members 164, 164,. In this case, the six connection ports 166, 166,... Are centered on the rotation shaft 130 so as to correspond to the suction holes 146 of the suction box 140 when the rotation turret 160 is rotated about the rotation shaft 130. It is formed on one circumference.
[0032]
As shown in FIG. 12, a film suction tool 170 is provided on each rod-shaped member 164 of the rotating turret 160. The film suction tool 170 is for sucking the cylindrical film F. The film suction tool 170 includes a block-shaped main body 172 as shown in FIG. The main body 172 has a concave suction surface 174 corresponding to the side surface of the cylindrical film F. Six suction ports 176, 176,... For sucking the cylindrical film F are formed on both sides of the suction surface 174, respectively. At one end of the main body 172, one connection pipe 178 communicating with the suction ports 176, 176,... Is provided.
[0033]
As shown in FIG. 12, the connection pipes 178 provided in each film suction tool 170 are connected to hoses 180, 166, 166,... Formed in the center member 164 of the rotary turret 160, respectively. Connected by Thereby, each connection port 166 formed in the rotary turret 160 is connected to the suction port 176 of each film suction tool 170.
[0034]
Therefore, as shown in the order of FIGS. 17 to 20, if the rotating turret 160 rotates clockwise, when the connection port 166 of the rotating turret 160 faces the suction hole 146 of the suction box 140, When the turret 160 is rotated within a predetermined range, the connection port 166 is connected to the suction hole 146, and a suction force is generated in the suction port 176 of the film suction tool 170 connected to the connection port 166. The film F can be suctioned by the film suction tool 170.
On the other hand, when the connection port 166 of the rotary turret 160 is not opposed to the suction hole 146 of the suction box 140, that is, when the rotary turret 160 is rotated out of a predetermined range, the connection port 166 No suction force is generated in the suction port 176 of the film suction tool 170 which is shut off from the connection port 146 and is connected to the connection port 166, and the film F is not sucked by the film suction tool 170.
Thus, the timing of whether or not the film F is sucked by the film suction tool 170 can be adjusted by rotating the suction box 140 with the cylinder 150 and changing the position of the suction hole 146. For example, if the suction box 140 is rotated clockwise in the same direction as the rotation of the rotating turret 160, the timing will be delayed. Conversely, if the suction box 140 is rotated counterclockwise in the opposite direction to the rotation direction of the rotating turret 160, the timing will be earlier.
[0035]
When the rotating turret 160 rotates, each of the above-described film suction tools 170 is rotated together with the rotating turret 160, and is separated from the center axis of the rotating turret 160 along the rod-shaped member 164 by a sliding mechanism 190 as a sliding means. The turret 160 is slid in a direction parallel to the turret 160 and is oscillated in a direction substantially parallel to the rotation direction of the rotating turret 160 by an oscillating mechanism 210 as oscillating means.
[0036]
The sliding mechanism 190 includes a convex sliding member 192, as shown in FIG. The sliding member 192 is provided so as to be slidable along the rod-shaped member 164 in a direction parallel to a direction away from the central axis of the rotating turret 160. Further, the sliding member 192 is pulled by the spring 194 to the fixed side of the rod-shaped member 164. Further, a sliding roller 198 is attached to one end of the sliding member 192 via a support member 196. Further, a sliding guide member 200 is provided on the front surface of the plate 100.
In the sliding mechanism 190, when the rotating turret 160 rotates, the sliding roller 198 comes into contact with the sliding guide member 200, and the sliding member 192 rotates along the rod-shaped member 164 by resisting the elastic force of the spring 194. The turret 160 is slid in a direction parallel to the direction away from the central axis.
[0037]
As shown in FIG. 21, the swing mechanism 210 includes an L-shaped swing member 212. The center of the swing member 212 is provided at the other end of the sliding member 192 via a shaft 214 fixed to the center of the swing member 212 so as to be swingable in a direction substantially parallel to the rotation direction of the rotating turret 160. One end of the swinging member 212 is pulled by the spring 216 until it hits the stopper pin 218. A swing roller 220 is attached to the other end of the swing member 212. Further, on the front surface of the plate 100, a swing guide member 222 is provided.
In the swing mechanism 210, when the rotating turret 160 rotates, the swing roller 220 comes into contact with the swing guide member 222, and the swing member 212 resists the elastic force of the spring 216 to change the rotating direction of the rotating turret 160. It is swung in a direction substantially parallel.
[0038]
The film suction tool 170 is fixed to the swinging member 212 via a shaft 214 in order to transmit the movements of the above-described rotating turret 160, sliding mechanism 190, and swing mechanism 210 to the film suction tool 170. Therefore, the movements of the rotary turret 160, the sliding mechanism 190, and the swing mechanism 210 are transmitted to the film suction tool 170.
[0039]
A bucket conveyor 230 is provided at the center of the transport conveyor 12 as a work transport unit. The bucket conveyor 230 includes two shafts 232, 234, as shown in FIG. The two shafts 232 and 234 are arranged on the upstream side and the downstream side in the center of the conveyor 12 so as to face up and down, respectively. A pulley 236 is fixed to the shaft 232 on the upstream side. A motor 238 is provided near the pulley 236. The pulley 240 is also fixed to the shaft of the motor 238. A timing belt 242 is applied to the pulleys 236 and 240. Therefore, the shaft 232 can be rotated counterclockwise when viewed from above by the motor 238 or the like.
Further, gears 244 and 246 are fixed to the two shafts 232 and 234, respectively. A chain 248 is applied to the gears 244 and 246. Two cup-shaped buckets 250 for holding the work W are fixed to the chain 248 at intervals. Therefore, the buckets 250 and 250 can be moved counterclockwise around the chain 248 by the motor 238 and the like when viewed from above.
In the bucket conveyor 230, the moving path along which the bucket 250 is moved to the left in the moving path of the bucket 250, that is, most of the conveying paths in the conveying path of the work W by the bucket 250 are located next to the conveying conveyor 12. And below the rotating turret 160. Therefore, the rotating turret 160 rotates so that a portion approaching the transport path of the work W is displaced in the same direction as the transport direction of the work W by the bucket conveyor 230.
In the bucket conveyor 230, the movement path immediately before the movement path of the bucket 250 to the left in the movement path of the bucket 250, that is, the initial transfer path of the work path of the work W by the bucket 250 is the transfer conveyor 12 It is provided from above to below the rotating turret 160. Further, in the bucket conveyor 230, the moving path immediately after the moving path in which the bucket 250 is moved to the left in the moving path of the bucket 250, that is, the final conveying path in the conveying path of the work W by the bucket 250 is the rotating turret 160 Is provided over the conveyor 12 from below.
A guide rail 252 is provided beside the transport path of the work W by the bucket 250, as shown in FIG. Further, a guide plate 254 is provided below the transport path of the work W by the bucket 250. The guide rail 252 and the guide plate 254 guide the work W held by the bucket 250.
Therefore, in the bucket conveyor 230, the work W is held by the bucket 250, along the guide rails 252 and the guide plates 254, from the upstream side of the conveyor 12 to the downstream side of the rotary turret 160 and downstream of the conveyor 12. Can be transported.
[0040]
As shown in FIG. 23, sensors 260 and 262 are provided on the upstream side and the downstream side of the bucket conveyor 230 in the transport path of the transport conveyor 12, respectively. The sensor 260 is for detecting that the work W is transported to the bucket 250 of the bucket conveyor 230 by the transport conveyor 12. Further, the sensor 262 is for detecting that the work W is transported to the transport conveyor 12 by the bucket 250 of the bucket conveyor 230.
[0041]
Further, a stopper 270 is provided on the transport path of the transport conveyor 12 on the upstream side of the sensor 260 as shown in FIG. The stopper 270 stops the work W conveyed by the conveyor 12 before the bucket conveyor 230. The stopper 270 includes a stopper member 272. The stopper member 272 is connected to a rod of a cylinder 274 provided near the transport path of the transport conveyor 12. The cylinder 274 is for causing the stopper member 272 to protrude into the transport path of the transport conveyor 12 before the bucket conveyor 230 or to retract from the transport path of the transport conveyor 12. Therefore, the work W conveyed by the conveyor 12 can be stopped by the stopper 270 just before the bucket conveyor 230.
[0042]
Here, the relationship between the movement of the film F by the rotating turret 160 or the like and the conveyance of the work W by the bucket conveyor 230 will be described.
[0043]
The rotating turret 160 is temporarily stopped, and the cylindrical film F is waiting at a predetermined position. In this case, the cylindrical film F is suction-held by the film suction tool 170 located at the lower right of the rotating turret 160 that is temporarily stopped. Further, in this case, the cylindrical film F has its lower opening directed obliquely downward at the height of the upper end of the work W conveyed by the bucket conveyor 230, and the work conveyed by the bucket conveyor 230. W stands by in a state where W easily enters the opening. The cylindrical film F is cut from the long film L by the cutter unit 90 when the rotating turret 160 rotates and the film suction tool 170 comes upward and approaches the cutter unit 90. The suction is held at 170.
[0044]
When the workpiece W is transported by the transport conveyor 12 to the bucket 250 of the bucket conveyor 230, the workpiece W is detected by the sensor 260.
[0045]
When the work W is detected by the sensor 260, the bucket conveyor 230 operates, and the work W travels under the rotary turret 160 from the upstream side of the transport conveyor 12 along the guide rail 252 and the guide plate 254 with the bucket 250 of the bucket conveyor 230. After that, it is transported to the downstream side of the transport conveyor 12.
[0046]
The work W is conveyed by the bucket 250 of the bucket conveyor 230 along the guide rail 252 and the guide plate 254 below the rotary turret 160, and the upper end of the work W is suction-held by the film suction tool 170 to form a cylindrical film F. 24 to 31, the rotating turret 160 rotates clockwise as shown in the order of FIGS. 24 to 31, and is rotated by the bucket conveyor 230 in a direction parallel to the direction in which the workpiece W is conveyed by the bucket conveyor 230. The tubular film F is moved at substantially the same speed as the transport speed of the work W, and the tubular film F is moved so that the opening of the tubular film F faces the work W being transported by the bucket conveyor 230. While swinging, the cylindrical film F is moved to the work W being conveyed by the bucket conveyor 230. And the tubular film F is put on the upper portion including the projections P1~P3 workpiece W.
[0047]
As described above, when the rotary turret 160 is rotated to a position where the cylindrical film F is covered on the upper portion of the work W, the connection port 166 of the rotary turret 160 related to the suction holding of the film F causes the suction box 140 to be sucked. It is blocked from the hole 146. As a result, the film F is no longer sucked and held by the film suction tool 170 as shown in FIG. FIG. 31 shows a state immediately before the film F falls. In the state shown in FIG. 31, the work W covered with the film F is transported by the bucket 250 of the bucket conveyor 230 to a position where the workpiece W partially reaches the transport conveyor 12.
The rotating turret 160 is temporarily stopped when the next cylindrical film F sucked and held by the next film suction tool 170 reaches a predetermined position, and the next cylindrical film F stands by at the predetermined position. I do.
[0048]
When the work W covered with the film F is conveyed to the conveyor 12 by the bucket 250 of the bucket conveyor 230, the work W is detected by the sensor 262.
[0049]
When the work W is detected by the sensor 262, the bucket conveyor 230 stops, and the work W is further transferred by the transfer conveyor 12.
[0050]
When the work W is detected by the sensor 260 on the upstream side of the bucket conveyor 230, the stopper 270 operates to stop the next work W conveyed by the conveyor 12 before the bucket conveyor 230.
When the work W is detected by the sensor 262 on the downstream side of the bucket conveyor 230, the stopper 270 is released, and the next work W is transported to the bucket 250 of the bucket conveyor 230 by the transport conveyor 12.
Therefore, the next work W is covered with the next cylindrical film F in the same manner as the previous work W.
[0051]
A sensor 280 is provided on the downstream side of the sensor 262 in the transport path of the transport conveyor 12, as shown in FIG. This sensor 280 is for detecting the work W.
[0052]
Further, a hitting unit 290 is provided on the downstream side of the sensor 280 in the transport path of the transport conveyor 12, as shown in FIG. The hitting unit 290 is for hitting the film F that is not sufficiently covered with the work W from above to cover the work W sufficiently. The hitting unit 290 includes, for example, a disk-shaped hitting member 292, as shown in FIGS. The hitting member 292 is fixed to the tip of the rod of the cylinder 294. The cylinder 294 is fixed to the column 32b with the support member 296 such that the tip of the rod faces downward. The cylinder 294 is for displacing the hitting member 292 downward on the transport path of the transport conveyor 12.
[0053]
The hitting unit 290 operates when the work W is detected by the sensor 280. When the hitting unit 290 operates, the rod of the cylinder 294 expands and contracts. Thus, the film F that is not sufficiently covered with the work W can be hit from above with the hitting member 292 and can be sufficiently covered with the work W.
The hitting unit 290 operates after the work W is detected by the sensor 280, and works regardless of whether the work W is sufficiently covered with the film F.
[0054]
As shown in FIG. 1, a scraping unit 300 is provided on the downstream side of the hitting unit 290 in the transport path of the transport conveyor 12. The scraping unit 300 is for scraping down the film F that is not sufficiently covered with the work W. The scraping unit 300 includes two brushes 302 and 304 as shown in FIG. These brushes 302 and 304 are provided on both sides of the transport path of the transport conveyor 12, respectively. In this case, the brushes 302 and 304 are rotatably supported such that a portion of the transport conveyor 12 facing the transport path is displaced downward. Motors 306 and 308 are connected to these brushes 302 and 304, respectively. Therefore, the brushes 302 and 304 can be rotated by the motors 306 and 308 such that the portions of the brushes 302 and 304 facing the transport path of the transport conveyor 12 are displaced downward. Therefore, the film F that is not sufficiently covered with the work W can be scraped down by the scraping unit 300.
[0055]
As shown in FIG. 1, sensors 310, 312, and 314 are provided at intervals on the downstream side of the scraping unit 300 on the transport path of the transport conveyor 12.
In this case, the sensor 310 is provided, for example, about 3 cm above the height of the work W from the mounting surface of the work W on the conveyor 12. The sensor 310 is for detecting a film F that is not sufficiently covered by the work W.
The sensor 312 is provided, for example, about 2 cm above the diameter of the work W from the mounting surface of the work W on the conveyor 12. Therefore, the sensor 312 detects the work W when the work W has not fallen, but does not detect the work W when the work W has fallen.
Further, the sensor 314 is provided about a radius of the work W above the work W mounting surface of the conveyor 12. Therefore, the sensor 314 also detects the work W when the work W has fallen and when the work W has not fallen.
The sensors 312 and 314 are for detecting that the work W has fallen. In this case, by detecting the work W with the sensor 314 without detecting the work W with the sensor 312, it is possible to detect that the work W has fallen.
[0056]
A heating furnace (not shown) is provided as a heating means on the downstream side of the sensors 310, 312 and 314 in the transport path of the transport conveyor 12. The heating furnace is for heating the film F covered on the work W and contracting the film F so as to be in close contact with the side surface of the work W as shown in FIG.
[0057]
Next, a process of covering the workpiece W with the tubular film F by the packaging device 10 and packaging the workpiece W with the tubular film F will be described.
[0058]
On the holding reel 20 of the packaging device 10, a tubular long film L is flatly folded and rolled and held. The long film L is pulled out from the holding reel 20 by the film feeder 80 via the perforation forming unit 40 and the folding device 60.
[0059]
A perforation M for tearing is formed on the long film L by the perforation forming unit 40. In addition, the long film L is folded back into a tubular shape by the folding device 60, and the folding habit is removed. Further, the long film L is fed by the film feeder 80 by a predetermined length.
[0060]
In the cutter unit 90, the long film L is cut into cylindrical films F having a predetermined length.
[0061]
The cut tubular film F is suction-held by a film suction tool 170 provided on a rotating rotary turret 160. The rotating turret 160 is temporarily stopped at a predetermined position, and makes the film F sucked and held by the film suction tool 170 stand by at a predetermined position, that is, at a lower right position of the rotating turret 160.
[0062]
On the other hand, when the work W is transferred to the bucket 250 of the bucket conveyor 230 by the transfer conveyor 12, the next work W is stopped by the stopper 270, and the transferred work W is held by the bucket 250 of the bucket conveyor 230. In this state, the sheet is conveyed along the guide rail 252 and the guide plate 254 from the upstream side of the conveyor 12 to the downstream side of the conveyor 12 via the lower part of the rotary turret 160.
[0063]
When the bucket conveyor 230 conveys the work W and the upper end of the work W enters the lower opening of the cylindrical film F sucked and held by the film suction tool 170, the rotating turret 160 is synchronized with the bucket conveyor 230. Then, the sliding mechanism 190 and the swing mechanism 210 operate, and the film F sucked and held by the film suction tool 170 is put on the upper portion of the work W including the projections P1 to P3.
[0064]
When the film F is put on the upper part of the work W, the film F is not sucked and held by the film suction tool 170 and falls and is put on the work W.
[0065]
After that, the rotating turret 160 is temporarily stopped at a predetermined position, and the next film F sucked and held by the film suction tool 170 is made to stand by at the predetermined position.
Further, when the sensor 262 detects the work W, the stopper 270 is released, and the next work W is first covered with the next film F in the same manner as the work W.
[0066]
When the sensor 280 detects the work W, the beating unit 290 beats the film F that is not sufficiently covered on the work W against the work W.
[0067]
Further, the film F that is not sufficiently covered with the work W even by the hitting unit 290 is lowered by the scraping unit 300.
[0068]
The film F that is not sufficiently covered by the work W even by the hitting unit 290 and the scraping unit 300 is detected by the sensor 310, and based on the detection of the sensor 310, for example, a buzzer sounds to notify an abnormality.
Further, when the work W has fallen, it is detected by the sensors 312 and 314, and based on the detection of the sensors 312 and 314, the entire packaging device 10 is stopped.
[0069]
Then, the film F covered on the work W is heated and shrunk in the heating furnace.
Thereby, the work W is packaged with the film F.
[0070]
Similarly, the succeeding work W is covered with the succeeding film F, and the succeeding work is wrapped with the succeeding film F.
[0071]
In the packaging device 10, the cylindrical film F is covered on the work W by the rotary turret 160 or the like while the work W is conveyed by the bucket conveyor 230, so that the cylindrical film F can be covered on the work W efficiently.
Moreover, in the packaging device 10, the cylindrical film F is moved at substantially the same speed as the transfer speed of the work W in the direction parallel to the transfer direction of the work W, and the opening of the cylindrical film F is moved to the work W side. The cylindrical film F is moved toward the work W while swinging the cylindrical film F so as to face the work W. Therefore, even if the end of the work W has protrusions P1 to P3, the cylindrical film F is The work W can be covered with the tubular film F without being caught on the projections P1 to P3.
Therefore, in the packaging device 10, even when the work W has the projections P1 to P3 at the end, the work W can be covered with the cylindrical film F efficiently.
[0072]
In the packaging apparatus 10, the suction surface 174 of the film suction tool 170 is formed in a concave shape, and the suction ports 176 of the film suction tool 170 are formed on both sides of the suction surface 174. Therefore, since the cylindrical film F approaches the suction ports 176 on both sides of the suction surface 174 in the film suction tool 170, the film suction tool 170 can easily suck the cylindrical film F.
[0073]
Further, in the packaging device 10, the connection port 166 of the rotating turret 160 is connected to the suction hole 146 of the suction box 140 when the rotating turret 160 is rotated within a predetermined range, and the rotating turret 160 is moved to the predetermined range. It is formed so as to be shut off from the suction hole 146 of the suction box 140 when it is rotated outside. Therefore, when the rotating turret 160 is rotated within a predetermined range, a suction force is generated in the suction port 176 of the film suction tool 170, and the film suction tool 170 can suck the cylindrical film F.
[0074]
Further, in the packaging device 10, by displacing the suction box 140 to change the position of the suction hole 146 and changing the timing at which the connection port 166 and the suction hole 146 are connected to the rotation of the rotating turret 160, Since the cylinder 150 is provided as an adjusting means for adjusting the timing at which the cylindrical film F is suctioned by the film suction tool 170, the timing at which the cylindrical film F is suctioned by the film suction tool 170 can be adjusted optimally. it can.
[0075]
Further, in the packaging apparatus 10, as an auxiliary means for displacing the cylindrical film F not sufficiently covered by the work W toward the work W and sufficiently covering the work W, on the downstream side of the transport path of the work W, Since the hitting unit 290 and the scraping unit 300 are provided, it is possible to sufficiently cover the work W with the cylindrical film F not sufficiently covered by the work W.
[0076]
In addition, the packaging device 10 includes a film feeder 80 as a film transfer unit that transfers the cylindrical long film L, and further converts the cylindrical long film L into a cylindrical film F having a predetermined length. Since the cutter unit 90 is provided as a cutting means for cutting, the tubular long film L can be used as the tubular film F.
[0077]
Further, in the packaging apparatus 10, as a perforation forming means for forming the perforation M for tearing on the tubular long film L in order to form the perforation M for tearing on the tubular film F, Since the forming unit 40 is provided, the perforations M for tearing can be formed on the tubular film F.
[0078]
Further, the packaging device 10 includes a holding reel 20 as holding means for holding the cylindrical long film L folded flat and wound in a roll shape, and furthermore, the long film L held on the holding reel 20 is provided. Since the folding device 60 and the film feeder 80 are provided as a spreading means for drawing out from the holding reel 20 and expanding the film into a cylindrical shape, the cylindrical long film L is flatly folded and rolled into a cylindrical film. It can be used as a material for F.
[0079]
Further, in the packaging device 10, since the trapezoidal screw 114 and the handle 116 are provided as displacement means for vertically displacing the rotary turret 160, by rotating the handle 116, the rotary turret 160 and the film suction The tool 170 and the like can be displaced up and down. Therefore, the packaging apparatus 10 can cope with a change in the height of the work.
[0080]
In the packaging device 10 described above, the transport conveyor 12 and the bucket conveyor 230 are used as the workpiece transport means for transporting the workpiece. However, in the present invention, a work transport unit having another structure may be used. Good.
[0081]
Further, in the packaging device 10 described above, the rotating turret 160, the film suction tool 170, and the sliding member are used as film moving means for moving the cylindrical film so as to cover the work conveyed by the work conveying means with the cylindrical film. Although the mechanism 190 and the swing mechanism 210 are used, in the present invention, they may be changed to other structures.
[0082]
Furthermore, in the above-described packaging apparatus 10, the hitting unit 290 and the scraping unit 300 are used as auxiliary means, but in the present invention, they may be changed to other structures, and only one of them may be used. Either may be used or neither may be used.
[0083]
Further, in the packaging device 10 described above, the perforation forming unit 40 is used as the perforation forming means. However, in the present invention, the perforation forming means is provided when the tearing perforation is not formed on the film. It is not necessary.
[0084]
Further, in the above-described packaging device 10, the holding reel 20, the perforation forming unit 40, the folding device 60, the film feeder 80, the cutter unit 90, the stopper 270, and the like are used, but they are also of other structures. It may be changed.
[0085]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the packaging apparatus which can cover a workpiece | work efficiently with a cylindrical film even if it has a protrusion in the edge part of a workpiece | work is obtained.
[Brief description of the drawings]
FIG. 1 is a schematic front view showing an example of a packaging device according to the present invention.
FIG. 2 is an illustrative side view of the packaging device shown in FIG. 1;
FIG. 3 is a front view showing an example of a work conveyed by the packaging device shown in FIG.
FIG. 4 is a perspective view showing an example of a tubular long film transferred by the packaging device shown in FIG. 1;
5 is a front view showing a state in which the cylindrical long film shown in FIG. 4 is folded flat.
FIG. 6 is an illustrative view showing a perforation forming unit used in the packaging device shown in FIG. 1;
FIG. 7 is an illustrative front view showing an upper portion of a frame of the packaging device shown in FIG. 1;
FIG. 8 is a front view showing a folding device used in the packaging device shown in FIG. 1;
FIG. 9 is a side view showing a main body and the like of the folding device shown in FIG. 8;
FIG. 10 is an illustrative plan view showing a film feeder used in the packaging device shown in FIG. 1;
FIG. 11 is an illustrative plan view showing a cutter unit used in the packaging device shown in FIG. 1;
12 is an illustrative front view showing a rotating turret and the like used in the packaging device shown in FIG. 1;
FIG. 13 is an illustrative side view showing a rotating turret and the like used in the packaging device shown in FIG. 1;
FIG. 14 is an illustrative plan view showing a rotating turret and the like used in the packaging device shown in FIG. 1;
FIG. 15 is a front view showing a suction box used in the packaging device shown in FIG. 1;
FIG. 16 is a perspective view showing a film suction tool used in the packaging device shown in FIG. 1;
17A and 17B are diagrams showing a rotary turret and the like used in the packaging device shown in FIG. 1, wherein FIG. 17A is a schematic front view thereof, and FIG.
18A and 18B are diagrams showing a rotary turret and the like used in the packaging device shown in FIG. 1, wherein FIG. 18A is a front view and FIG.
19A and 19B are diagrams showing a rotary turret and the like used in the packaging device shown in FIG. 1, wherein FIG. 19A is a front elevational view and FIG.
20 is a diagram showing a rotary turret and the like used in the packaging device shown in FIG. 1, (A) is a schematic illustration of a front view thereof, and (B) is an enlarged schematic illustration of a main part thereof.
FIG. 21 is an illustrative view showing a sliding mechanism and a swinging mechanism used in the packaging device shown in FIG. 1;
FIG. 22 is an illustrative plan view showing a bucket conveyor used in the packaging apparatus shown in FIG. 1;
FIG. 23 is an illustrative plan view showing a bucket conveyor and the like shown in FIG. 22;
24A and 24B are diagrams illustrating a relationship between a cylindrical film to be moved and a workpiece to be conveyed in the packaging device illustrated in FIG. 1, and FIG. (B) is a schematic plan view showing a transferred work and the like.
25 is a diagram showing a relationship between a cylindrical film to be moved and a workpiece to be conveyed in the packaging device shown in FIG. 1, and FIG. 25 (A) is a schematic front view showing a cylindrical film to be moved; (B) is a schematic plan view showing a transferred work and the like.
26A and 26B are diagrams illustrating a relationship between a cylindrical film to be moved and a work to be conveyed in the packaging apparatus illustrated in FIG. 1, and FIG. (B) is a schematic plan view showing a transferred work and the like.
27A and 27B are diagrams illustrating a relationship between a cylindrical film to be moved and a workpiece to be conveyed in the packaging apparatus illustrated in FIG. 1, and FIG. 27A is a schematic front view illustrating a cylindrical film to be moved; (B) is a schematic plan view showing a transferred work and the like.
28A and 28B are diagrams illustrating a relationship between a cylindrical film to be moved and a workpiece to be conveyed in the packaging apparatus illustrated in FIG. 1, and FIG. (B) is a schematic plan view showing a transferred work and the like.
29A and 29B are diagrams illustrating a relationship between a cylindrical film to be moved and a workpiece to be conveyed in the packaging device illustrated in FIG. 1, and FIG. 29A is a front view illustrating a cylindrical film to be moved; (B) is a schematic plan view showing a transferred work and the like.
30A and 30B are diagrams illustrating a relationship between a cylindrical film to be moved and a workpiece to be conveyed in the packaging apparatus illustrated in FIG. 1, and FIG. 30A is a schematic front view illustrating a cylindrical film to be moved and the like; (B) is a schematic plan view showing a transferred work and the like.
31A and 31B are diagrams illustrating a relationship between a cylindrical film to be moved and a workpiece to be conveyed in the packaging device illustrated in FIG. 1, and FIG. (B) is a schematic plan view showing a transferred work and the like.
FIG. 32 is an illustrative front view showing a beating unit used in the packaging apparatus shown in FIG. 1;
FIG. 33 is an illustrative side view of the hitting unit shown in FIG. 32;
FIG. 34 is an illustrative plan view of the hitting unit shown in FIG. 32;
FIG. 35 is an illustrative plan view showing a scraping unit used in the packaging device shown in FIG. 1;
36 is a front view showing a workpiece covered with a tubular film by the packaging device shown in FIG. 1 and packaged with the tubular film.
[Explanation of symbols]
10 Packaging equipment
12 Conveyor
20 Holding reel
30 frames
32a-32d prop
40 perforation forming unit
42 perforation blade
50 plates
60 Folding device
62 body
64 Guide plate
66, 68, 74 rollers
70 Supporting members
72 Guide plate
76 Supporting member
78 Support Roller
80 film feeder
82, 84 Film feed roller
86 motor
90 Cutter unit
92, 94 Cutting blade
96 crank mechanism
98 motor
100 plates
102a, 102b holder
110 holder
112 Bearing unit
114 trapezoidal screw
116 handle
118 Holder
120 female screw
130 rotation axis
132 motor
134, 136 pulley
138 Timing Belt
140 suction box
142 Blower
144 hose
146 suction hole
150 cylinder
152 rod
160 rotating turret
162 center member
164 bar-shaped member
166 Connection port
170 Film suction tool
172 body
174 suction surface
176 suction port
178 connecting pipe
180 hose
190 Sliding mechanism
192 Sliding member
194 spring
196 Supporting member
198 Sliding roller
200 Sliding guide member
210 swing mechanism
212 swing member
214 axes
216 spring
218 Stopper pin
220 Rolling roller
222 guide member for swing
230 bucket conveyor
232, 234 axes
236, 240 pulley
238 motor
242 Timing belt
244, 246 gear
248 chain
250 buckets
252 guide rail
254 guide plate
260, 262 sensor
270 stopper
272 Stopper member
274 cylinder
280 sensor
290 hitting unit
292 Hitting member
294 cylinder
296 Supporting member
300 scraping unit
302, 304 brush
306, 308 motor
310, 312, 314 sensors
W Work
B Work body
P1 to P4 protrusion
L long film
F film
M perforation for tearing

Claims (10)

A packaging device that covers the work with a tubular film and packs the work with the tubular film,
Work transport means for transporting the work, and a film moving means for moving the tubular film to cover the cylindrical film on the work being transported by the work transport means,
The film moving means moves the cylindrical film at substantially the same speed as the transfer speed of the work by the work transfer means in a direction parallel to the transfer direction of the work by the work transfer means, While swinging the cylindrical film so that the opening of the film is directed to the work side being conveyed by the work conveying means, the cylindrical film is moved to the work side conveyed by the work conveying means. A packaging device that covers the workpiece by moving the cylindrical film. The film moving means,
A rotating turret that is provided above the work transfer path of the work by the work transfer means and rotates so that a portion approaching the work transfer path is displaced in the same direction as the work transfer direction by the work transfer means;
A film suction tool provided on the rotating turret and having a suction surface formed with a suction port for sucking the cylindrical film,
Sliding means for sliding the film suction tool in a direction parallel to the direction away from the center axis of the rotary turret, and rocking means for rocking the film suction tool in a direction substantially parallel to the rotation direction of the rotary turret The packaging device according to claim 1, comprising: The sliding means,
A sliding member provided on the rotating turret so as to be slidable in a direction parallel to a direction away from a center axis of the rotating turret;
The sliding roller attached to the sliding member, and with the rotation of the rotating turret, comes into contact with the sliding roller and slides the sliding member in a direction parallel to a direction away from the center axis of the rotating turret. Including a sliding guide member,
The swing means,
A swing member provided on the sliding member so as to swing in a direction substantially parallel to the rotation direction of the rotating turret,
A swing roller attached to the swing member, and a swing that contacts the swing roller with the rotation of the rotary turret and swings the swing member in a direction substantially parallel to the rotation direction of the rotary turret. Including a moving guide member,
The packaging device according to claim 2, wherein the film suction tool is fixed to the swing member. The suction surface of the film suction tool is formed in a concave surface shape,
The packaging device according to claim 2, wherein the suction ports of the film suction tool are formed on both sides of the suction surface. A connection port connected to the suction port of the film suction tool is formed in the rotating turret,
A suction box is formed so as to face a portion including the connection port of the rotating turret,
A suction hole is formed in a portion of the suction box facing the rotary turret,
The connection port of the rotary turret is connected to the suction hole of the suction box when the rotary turret is rotated within a predetermined range, and when the rotary turret is rotated outside a predetermined range. The packaging device according to claim 2, wherein the packaging device is shut off from the suction hole of the suction box. By displacing the suction box, changing the position of the suction hole, and changing the timing at which the connection port and the suction hole are connected with respect to the rotation of the rotary turret, the cylindrical film is used as the film. The packaging device according to claim 5, further comprising an adjusting unit that adjusts a timing of suctioning by the suction tool. 7. The downstream side of the work conveyance path, further comprising auxiliary means for displacing the cylindrical film, which is not sufficiently covered by the work, toward the work side so as to cover the work sufficiently. The packaging device according to any one of the above. Film transfer means for transferring a cylindrical long film that is cut into a predetermined length to become the cylindrical film, and the cylindrical long film to the cylindrical film having a predetermined length. The packaging device according to any one of claims 1 to 7, further comprising a cutting means for cutting. 9. The packaging apparatus according to claim 8, further comprising a perforation forming means for forming the tear perforations in the long tubular film in order to form a perforation in the tubular film. Holding means for holding the cylindrical long film flatly folded and wound in a roll shape, and spreading means for pulling out the long film held by the holding means from the holding means and expanding it into a cylindrical shape, The packaging device according to claim 8.

Images