JP4190919B2 - Packaging equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  In the present invention, when wrapping a workpiece such as various articles by wrapping around the workpiece, the wrapping sheet is adhered to the workpiece for packaging.Packaging equipmentAbout.
[0002]
[Prior art]
Generally, as this type of packaging device, for example, there are those described in Patent Documents 1 and 2 below. These wrapping apparatuses are configured to wrap and wrap a flap extending outward from both end faces of the work by covering the work in a body-wound or body-folded state with a wrapping film of a predetermined size.
If the packaging film is a flexible film such as polyethylene, the flaps hang down on both sides of the work, with the film wrapped around the workpiece. There wasn't. In this case, the folded film was wrinkled, bent, etc., and looked bad.
In order to improve such a problem, for example, in Patent Document 1, air supply pipes are arranged at predetermined intervals on the outer surface of a film wound around a work. Then, air is blown out along the outer surface of the flap from both sides of the air supply pipe to create a negative pressure on the surface of the flap, causing the sagging film to form a cylinder along the outer surface of the workpiece, forming in parallel with the cylinder Was. In this state, the flap is folded into the end surface of the workpiece by the folding member and packaging is performed.
Similarly, in Patent Document 2, air is supplied along the outer surface of a film in a body-wound state, so that a flap is caused in a cylindrical shape due to a pressure difference and is formed in a cylinder parallel.
[0003]
[Patent Document 1]
Japanese Patent Publication No.49-29269
[Patent Document 2]
Japanese Utility Model Publication No. 3-40903
[0004]
[Problems to be solved by the invention]
  However, in the packaging device as described above, if the flap is long, the air flow must be strengthened, and a high-pressure air supply device is required, which is expensive. In addition, if the flap is long, it may not be possible to cause the flap to hang down by high-pressure air. Also, when folding the flap, the cylinder-wound work is moved in the direction intersecting the airflow, but at that time, the airflow becomes resistance and the flap parallel to the cylinder is deformed, causing the film to bend and bend. It was. In particular, the area of the upper surface of the flap may be bent by an air flow, and wrinkles may occur. For this reason, there was a problem that the packaging was not clean and good-looking.
  In view of such a situation, the present invention can surely cause a flap and prevent the flap from being wrinkled or bent.Packaging equipmentThe purpose is to provide.
[0005]
[Means for Solving the Problems]
  A packaging device according to the present invention is a packaging device in which a workpiece partially wrapped with a packaging sheet is held by a holding means, and a flap of a packaging sheet extending outward from the end surface of the workpiece is folded into the end surface of the workpiece. An adsorber that adsorbs one area, a folding member that folds the other area of the flap into the end face of the worm, and the adsorber that moves the other area of the flap into the end face of the work with the folding member. With an interlocking mechanism that separates from the end face of theThe interlocking mechanism includes a cam member that has a cam surface and moves together with the folding member, and a cam follower that abuts the cam surface of the cam member and interlocks the adsorber, and is interlocked with the movement of the folding member. The suction unit is separated from the end face of the workpiece viaIt is characterized by that.
  When the wrapping sheet is partially wrapped, such as in the case of body fold or body wrapping, when the workpiece is moved relative to hold it with the holding means, the area of the flap is first moved by the suction device.TheAfter that, one area of the flap is separated from the end face of the work by the suction device, and the other area of the flap is folded by the folding member to the unwrapped end face of the work. Folding operation can be performed without making it free. Therefore, even if the packaging sheet is a soft film or the like, the flap can be neatly packaged without being bent or wrinkled. In addition, a fold can be formed in advance by folding one area of the flap once, so that the folding is further beautiful.In addition, the other area can be smoothly folded by the interlocking mechanism.
[0006]
  Further, the suction unit may hold the one area of the flap in a non-contact manner and allow the relative movement of the flap while suppressing the deformation of the one area in the suction state.
  Since the flap is sucked and held in a non-contact and floating state, it is difficult to cause wrinkles and scratches on the flap, and even if the flap is moved relative to the workpiece while adsorbing one area, the flap does not deform. From this point, it is difficult to cause wrinkles or bends.
  Further, the suction unit may be disposed at a position where one region of the flap is folded into the end surface of the workpiece with respect to the relatively folded or wound workpiece. When moving a workpiece in a cylinder-folded state or the like to be held by holding means or the like, it is possible to fold and fold one area of the flap by suction with an adsorber, and it is possible to package with an efficient and beautiful fold.
  Further, the adsorbers may be arranged to face each other, and a work in which a part of the packaging sheet is packaged is inserted between the opposed adsorbers so as to sandwich the opposite end faces.
  If the workpiece is free to swell, the dimensions between the opposing end faces may increase due to expansion due to air, temperature changes, stacking variations, etc., which may cause variations in the finished workpiece dimensions after packaging. It can be compressed by being inserted between the adsorbers at intervals, and the dimension between the end faces of the work can be regulated to be constant, and the adsorber has the function of a work size regulation guide.
[0008]
  Note that the packaging sheet described above may be an unstretched plastic film, and can be folded and separated in a non-contact manner by an adsorber, and the packaging sheet held with respect to the adsorber is relatively moved. Even so, no wrinkles or bends occur.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a packaging device according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view for explaining an outline of a process for packaging an integrated unit in an integrated packaging machine including a packaging device, FIG. 2 is a main part configuration diagram of a mechanism for transferring the integrated unit of the packaging device, and FIG. FIG. 4 is a plan view of the interlocking mechanism between the suction device and the side tacker shown in FIG. 3, FIG. 5 is a configuration diagram of the suction device, and FIG. 6 is a perspective view showing the work in a cylinder winding state. 7 (a), (b) and (c) are diagrams showing the operation process of the adsorber and the side tacker, and FIGS. 8 (a), (b) and (c) are diagrams showing the moving process of the integrated unit and the side tacker. It is.
The integrated packaging machine 1 shown in FIG. 1 is a unit unit in which a rectangular parallelepiped box (hereinafter simply referred to as a box) b such as a tissue box, for example, is arranged in close contact with an appropriate number of pieces, for example, 5 pieces. The integrated unit B is a device for packaging with a packaging sheet such as a plastic film f. In the present embodiment, a soft and soft unstretched plastic film made of, for example, a polyethylene film is used as the film f.
In the packaging process by the integrated packaging machine 1, the boxes b manufactured in sequence are arranged in the same direction in close contact with each other and conveyed by the integrated conveying device 2, and then the adjacent boxes b are separated from each other in the conveying process. Thereafter, the integrated unit B is formed by adhering to an appropriate number, for example, 5 pieces each. Then, the integrated unit B is sent upward by an elevator. On the other hand, in the packaging machine 3, a strip-shaped plastic film fo made of polyethylene or the like is wound around a roll 4, and the film fo is unwound from the roll 4 and cut at a predetermined length by a film cutting device 5.
Then, in the packaging machine 3, with the cut film f held horizontally, the integrated unit B that is lifted by the elevator is applied from the bottom and folded into a cylinder, and wrapped in the cylinder winding with the film f, and the flaps fa and fa at both ends are wrapped. Further, it is bent and sealed.
[0010]
In the stacking and packaging machine 1 having the steps of stacking the boxes b and packaging with the film f, a packaging device 6 of the packaging machine 3 for packaging the stacking unit B with the film f cut into a substantially square shape will be described below. To do.
In the packaging machine 3 shown in FIG. 1, the packaging device 6 is arranged in a direction substantially orthogonal to the conveyance path of the box b, and is wrapped around with the film f while conveying the integrated unit B. In addition, the packaging device 6 is disposed so as to be displaced in the vertical direction with respect to the conveyance path of the box b, and the integrated unit B on the conveyance path is lifted by an elevator so that the film is folded by the film f.
In the packaging device 6 shown in FIG. 2, the film f cut into a substantially square shape by the film cutting device 5 is conveyed to the position of the elevator 9 that raises the integrated unit B by a pair of belt pulleys 8 and 8 and is held stationary. Is done. On the upper side of the film f that is held stationary, a paddle mechanism 10 that holds the integrated unit B in which the film f is folded is disposed in a stationary state. A plurality of paddle mechanisms 10 are arranged at predetermined intervals and supported by an endless chain 11, and the paddle mechanisms 10 are intermittently conveyed by a driving source such as a motor (not shown).
In the intermittent conveyance, the pair of upper paddles 13 and 13 of the adjacent paddle mechanism 10 is moved from the receiving position of the stacking unit B by the pair of upper paddles 13 and 13 of the single paddle mechanism 10 to the receiving position of the stacking unit B. The distance until this is set as one pitch.
[0011]
In each paddle mechanism 10, as shown in FIG. 2, a pair of upper paddles 13, 13 are arranged facing each other so as to sandwich the integrated unit B. Each upper paddle 13 has a substantially L shape in side view, and forms a substantially plate shape extending in the stacking arrangement direction of the boxes b in the integrated unit B. Each upper paddle 13 is supported in a state where a substantially L-shaped head 13a extends in the horizontal direction and is fixed to the chain 11, and a leg 13b substantially perpendicular to the head 13a extends downward.
Moreover, a substantially plate-like paddle portion 14 for holding the side surface of the integrated unit B is attached to the inner side surface of the leg portion 13b. In the pair of upper paddles 13 and 13 of the paddle mechanism 10, the interval W between the paddle parts 14 and 14 is set to be substantially equal to the width of the long side of each box b of the integrated unit B. As a result, the stacking unit B lifted by the elevator 9 pushes the film f and folds it, so that the opposing side surfaces B3 and B4 of the stacking unit B are sandwiched between the pair of upper paddles 13 and 13. The interval between the pair of upper paddles 13 and 13 can be appropriately adjusted and set according to the width (length) of the work such as the integrated unit B.
[0012]
A press guide 15 that elastically deforms and presses the vicinity of the corner portion is attached to the upper portion of the paddle portion 14 via a film f that covers the upper surface B1 of the integrated unit B sandwiched by the paddle mechanism 10. By pressing with the press guide 15, the film f can be positioned and prevented from being displaced at the corners. The press guide 15 also extends in the stacking direction of the integrated units B.
In FIG. 2, between the belt pulleys 8 and 8, a pair of guides 17 and 17 are provided below the paddle mechanism 10 to allow the elevator 9 to enter and retract. The guides 17 and 17 are also provided with a gap W, and allow the integrated unit B supported by the elevator 9 to pass therethrough. Each guide 17 is formed with an inclined portion that widens the gap W on the lower side of the inner surface to facilitate the upward passage of the integrated unit B.
[0013]
In FIG. 2, a pair of bottom tackers 18 are provided above the guides 17 and 17 below the stationary paddle mechanism 10 that receives and clamps the stacking unit B. For convenience, the left tacker 18A is disposed on the left side. The right one is the bottom tacker 18B. Here, if the center line between the pair of bottom tackers 18A and 18B in the paddle mechanism 10 at the receiving position of the integrated unit B is O, the center line O is the elevator shaft of the elevator 9, the center lines of the guides 17 and 17, the integrated unit receiving It coincides with the center line between the upper paddles 13 and 13 at the position (stationary state).
The pair of bottom tackers 18A and 18B is a (horizontal) direction orthogonal to the center line O, and can be reciprocated in a direction approaching and separating from the center line O, and the pair of bottom tackers 18A, 18A, It reciprocates in a contact state or a non-contact state along the bottom surface B2 of the integrated unit B sandwiched by 18B. In FIG. 2, the bottom tackers 18 </ b> A and 18 </ b> B have a stationary position outside the pair of upper paddles 13 and 13 as an initial position.
Each bottom tacker 18 is formed in a substantially plate shape along the stacking direction of the integrated units B, and a vent hole 19 is formed inside, and the vent hole 19 communicates with air suction and supply means (not shown). Yes. In the bottom tacker 18, one or a plurality (three in the figure) of openings 20,... Are formed on the upper surface facing the bottom surface B 2 of the integrated unit B so as to communicate with the air holes 21. It extends substantially in parallel. Air can be exhausted or sucked from the opening 20.
[0014]
Then, as shown in FIG. 2, the pair of bottom tackers 18 </ b> A and 18 </ b> B draws air from the opening 22 in the direction of the center line O in a state where the integrated unit B is held by the paddle mechanism 10 by folding the film f. By moving, the film f extending downward from both side surfaces B3 and B4 of the integrated unit B can be pulled, and the body can be tightly wound. Then, when the stacking unit B is intermittently conveyed by the paddle mechanism 10 after the primary drum winding described later, the stacking unit B is slightly lifted upward by blowing air from the openings 18 of the bottom tackers 18A and 18B, and is stacked with the bottom tackers 18A and 18B. An air film (gas film) is formed between the film f of the unit bottom surface B2.
In addition, a primary heater 21 for temporarily fixing the body-fitting portion fb of the bottom surface B2 of the integrated unit and a main stop are provided below the paddle mechanism 10 in the conveyance direction by the chain 11 from the paddle mechanism 10 at the receiving position of the integrated unit B. A secondary heater 22 is provided so as to be able to advance and retreat relative to the torso part fb.
[0015]
Next, the folding mechanism 23 of the packaging device 6 will be described with reference to FIGS. In the folding mechanism 23 shown in the figure, the stacking unit B is held by the paddle mechanism 10 at the receiving position of the stacking unit B, but the paddle mechanism 10 is omitted in the drawing. On the upper side of the stacking unit B, a rotating shaft 24 is disposed substantially parallel to the transport direction of the stacking unit B. Arms 25 depending on the center of both end faces Ba, Ba of the integrated unit B held by the paddle mechanism 10 in FIG. 3 are attached to the rotating shaft 24, and each arm 25 is attached to the opposite end face Ba of the integrated unit B. An adsorber 26 is provided oppositely. In FIG. 3, the arm 25 and the suction unit 26 are positioned substantially coaxially with the center line O of the paddle mechanism 10.
As shown in FIG. 5, the adsorber 26 has a substantially cylindrical shape, and the lower surface forms an adsorbing surface 26a and forms a tapered portion 26b having a substantially conical recess at the center. A cylindrical nozzle channel 26c that forms an air channel is formed at the center bottom of the taper portion 26b, and a nozzle shaft 26d having a flange at the tip is provided at the center. Compressed air is supplied to the nozzle channel 26c from the compressor 27 via an electromagnetic valve. The compressed air discharged from the nozzle flow path 26c to the tapered portion 26b is ejected radially along the tapered portion 26b with the ejection direction being restricted in relation to the flange portion of the nozzle shaft 26d. Since negative pressure is generated at the center, the film f can be sucked and held on the suction surface 26a in a non-contact state.
Therefore, the adsorber 26 can adsorb and hold the film f in a non-contact manner with a weak intake and exhaust airflow.
[0016]
3 and 4, a cam follower 30 is rotatably supported at one end portion of the rotating shaft 24 via an arm portion 29. The cam follower 30 has a substantially disc shape and an outer peripheral surface formed in a substantially arc shape in cross section. When the cam follower 30 rotates about the rotation shaft 24, the adsorber 26 also rotates integrally around the rotation shaft 24.
Further, as shown in FIGS. 2 to 4, a pair of upper paddles 13 and 13 sandwiching the stacking unit B around which the film f is wound is positioned at the receiving position of the stacking unit B, and the both end faces Ba and Ba of the stacking unit B are positioned. The flaps fa and fa of the film f are formed so as to protrude on both sides. When the flap fa is a square cylinder, the upper surface region f1 (one region), the lower surface region f2, the right side region f3 (other region), and the left side region f4 (other region) (see FIG. 6). Since the film f is soft, the flap fa is actually free and the upper surface region f1 hangs downward.
A pair of side tackers 32 and 32 are provided on both sides of each flap fa so as to face each other along the arrangement direction of the paddle mechanism 10. For the sake of convenience, the pair of side tackers 32 is represented by the reference numeral 32A on the right side and in FIG. 3 by the reference numeral 32B. Both the side tackers 32A and 32B have a substantially plate shape, and have alternately uneven portions 33a and 33b so that the tip portions mesh with each other. The side tackers 32A and 32B are for folding and packaging the regions f3 and f4 on the left and right side surfaces of the flap fa on each end surface Ba of the integrated unit B, and for this purpose, they are moved relative to the end surface Ba. . In the present embodiment, one side tacker 32A is connected to the drive source, and the other side tacker 32B is held stationary.
[0017]
Side folding guides 35, 35 are attached to the vicinity of the concavo-convex portions 33 a, 33 b at the lower end of each side tacker 32. Each side folding guide 35 has a substantially V-shaped cross section, one side plate 35 a is fixed to the side tacker 32, and the other side plate 35 b has a substantially parallelogram shape, and the concave and convex portions 33 a and 33 b of the side tacker 32. It protrudes further forward, and when the side tacker 32 moves, the tip corners come into contact with the regions f3 and f4 on the left and right side surfaces of the flap fa and are pressed toward the end surface Ba.
3 and 4, a substantially plate-like cam member 36 is connected in parallel to the right side tacker 32A, and the top surface of the right side tacker 32A gradually decreases in the tip side region toward the tip edge. A cam surface 37 that forms a gently curved slope is formed. Then, the position where the suction unit 26 faces each end face Ba of the integrated unit B in a state where the upper surface area f1 of the flap fa is bent is set as an initial position, and the cam surface 37 of the cam member 36 contacts the cam follower 30 corresponding thereto. In contact.
When the side tacker 32A is moved in the direction of the central axis O in order to fold the region f3 on the right side surface of the flap fa from this initial position, the cam follower 30 is pushed upward along the slope of the cam surface 37 and around the rotation shaft 24. The adsorber 26 rotates around the rotary shaft 24 via the arm 25 and is separated upward from the end face Ba. In the present embodiment, it is assumed that the rotation radius of the adsorber 26 is longer than the rotation radius of the cam follower 30 relative to the rotation shaft 24. In addition, the cam surface 37 has a wide enough width that the cam follower 30 is not removed in the rotation range of the cam follower 30. The cam member 36, the cam follower 30, the rotating shaft 24, and the adsorber 26 constitute an interlocking mechanism.
[0018]
The packaging device 6 according to the present embodiment has the above-described configuration, and the operation will be described with reference to FIGS.
First, in FIG. 2, the film f cut to a predetermined size is sandwiched at both ends by a pair of belt pulleys 8, 8, transported to the integrated unit B receiving position, and held stationary. On the other hand, the stacking unit B that has been brought into close contact with each other by the stacking and transporting device 2 is transported and placed on the elevator 9 below the stacking unit B receiving position and lifted (illustrated by a two-dot chain line).
At the stacking unit B receiving position, the paddle mechanism 10 including the pair of upper paddles 13 and 13 intermittently conveyed by the chains 11 and 11 is stopped. Here, the center of the film f is slightly shifted from the center line O of the paddle mechanism 10 toward the front in the transport direction of the paddle mechanism 10. Between the paddle portions 14 and 14 of the upper paddles 13 and 13, the pair of adsorbers 26 and 26 of the folding mechanism 23 are held in a stationary state at positions where they can face both end faces Ba and Ba of the integrated unit B, respectively. ing.
Therefore, the integrated unit B rising by the elevator 9 pushes the film f from below and folds it to remove the film f from the belt pulleys 8 and 8. The stacking unit B passes between the pair of guides 17 and 17 so that the film f is bent into a substantially U shape between the guides 17 and 17 and both side surfaces B3 and B4 of the stacking unit B, and both sides thereof are frictionally lowered. pull. Thus, the film f is brought into close contact with the upper surface B1 and both side surfaces of the integrated knit B.
[0019]
In the further rising unit B, both side surfaces B3 and B4 are inserted between the pair of upper paddles 13 and 13, and both end surfaces Ba and Ba adjacent to these side surfaces are inserted between the pair of adsorbers 26 and 26. (See FIG. 7 (a)). Therefore, each flap fa projecting outward from the both end faces Ba, Ba of the integrated unit B in the body-folded state is bent at the upper edge line of each end face Ba by guiding the upper surface area f1 to the adsorber 26. Pressed against. In this case, each of the boxes b absorbs air because the integrated unit B swells freely, and the dimension between the opposing end faces Ba and Ba extends in the stacking direction, causing the finished dimensions of the integrated unit B after packaging to vary. However, it can be compressed by being inserted between a pair of adsorbers 26, 26 facing each other, and the finished dimension can be regulated to be constant while suppressing the swelling in the stacking direction.
The film f is closely adhered to the upper surface B1 of the integrated unit B, and a crease is formed along a corner (ridge line) between the upper surface B1 and the end surface Ba. Therefore, the regions f3 and f4 on the left and right side surfaces of the flap fa are loosely bent on the region f1 on the upper surface (see FIGS. 2, 7, and 8A).
Then, the vicinity of both end corners of the upper surface B1 of the rising integrated unit B stops at a position where it abuts against the press guides 15 and 15 via the film f and elastically deforms, and at the paddle parts 14 and 14 of the upper paddles 13 and 13 It is pinched. In this state, the suction unit 26 of the folding mechanism 23 bends the region f1 on the upper surface of each flap fa to the end surface Ba, and the cam follower 30 is in a position where it abuts against the tip of the cam surface 37 of the cam member 36 (FIG. 2, FIG. FIG. 7 (a)).
Further, both end portions of the film f in the body folded state are bent outward through the guides 17 and 17, but the left end portion in FIG. 2 extends longer than the right end portion. Further, since the press guides 15 and 15 elastically press the vicinity of both corners of the upper surface B1 through the film f, the displacement and loosening of the film f in the vicinity of the corners of the upper surface B1 are prevented.
[0020]
Next, the pair of bottom tackers 18A and 18B move in the directions close to each other toward the center line O while taking air from the openings 22 through the air holes 21, and as shown in FIG. The film f extending in the direction is pushed and moved horizontally on the bottom surface B2. Since the elevator 9 is lowered in conjunction with this, the integrated unit B sandwiched between the pair of upper paddles 13 and 13 is supported by the bottom tackers 18A and 18B.
By sliding each bottom tacker 18 in the direction of the center line O along the bottom surface B2 while sucking in the opening 22, the film f is gradually wrapped in a body-wound state so as to cover the bottom surface B2 from both sides. Moreover, by pulling softly by intake air, the film f is prevented from being stretched or displaced, and the film f is brought into close contact with the integrated unit B and tightly wound. When the bottom tackers 18A and 18B reach the vicinity of the center line O, the end portion of the short film f on the right side in the drawing is substantially in close contact with the bottom surface B2, but the end portion of the long film f on the left side is not in close contact with the bottom surface B. Some parts remain. At this position, the close movement of the bottom tackers 18A and 18B ends and stops. This state is referred to as a primary body winding state.
[0021]
Next, when the primary drum winding state is reached and each bottom tacker 18 is stopped, the paddle mechanism 10 is moved by the intermittent movement of the chain 11 and conveys the integrated unit B. At the same time, in each bottom tacker 18, air is blown out from the opening 22 through the vent hole 21 to slightly push up the integrated unit B against the elastic force of the press guides 15, 15. As a result, an air film with a thin gap is formed between the film f in close contact with the bottom surface B2 of the integrated unit B and each of the bottom tackers 18A and 18B, thereby making no contact.
Therefore, the film f is prevented from being pulled back and peeled from the bottom surface B2 of the integrated unit B that moves to the front side in the transport direction with respect to the bottom tacker 18B located on the rear side in the transport direction (right side in the drawing). At the same time, the bottom tacker 18A, which is stationary at the front side (left side in the figure) in the transport direction, the film end of the unwrapped portion is gradually pressed against the bottom surface B2 due to the air film, and the other end of the film f The drums are stacked on top of each other, and the drum winding of the film f is completed. This state is referred to as a secondary body winding state, and the film f is in a body winding state in which both ends are overlapped at the joint fb.
[0022]
Further, as shown in FIG. 8B, when the stacking unit B starts to be conveyed in the primary body winding state, the right side tacker 32A is simultaneously moved horizontally to fold the region f3 on the right side surface of the flap fa. Then, since the cam member 36 moves horizontally integrally, the cam follower 30 is gradually pushed upward along the slope-shaped cam surface 37 and rotates around the rotation shaft 24. The adsorber 26 is also rotated upward about the same axis by the rotation of the rotating shaft 24 and separated from the end surface Ba, and the region f1 on the upper surface of the flap fa adsorbed by the adsorber 26 is also separated from the end surface Ba and rotated upward. Be made.
In conjunction with the conveyance of the stacking unit B, the right side tacker 32A moves horizontally toward the left side tacker 32B at a higher speed than the stacking unit B. Then, the other side plate 35b of the side fold guide 35 pushes the region f3 on the right side surface of the flap fa at the tip corner and restricts it in the direction along the end surface Ba before the right side tacker 32A. Next, the region f3 on the right side surface of the flap fa is folded on the end surface Ba by the uneven portion 33a of the right side tacker 32A. At this time, since the region f1 on the upper surface of the flap fa is retracted upward by the suction unit 26, the region f3 on the right side surface is not folded over the region f1 on the upper surface.
Further, the left side tacker 32B in a stationary state relatively moves on the end surface Ba by the conveyance of the stacking unit B, and the region f4 on the left side surface of the flap fa is folded on the end surface Ba by the uneven portion 33b. Then, the concave and convex portions 33a and 33b of the side tackers 32A and 32B are engaged with each other, whereby the folding of the regions f3 and f4 on both side surfaces of the flap fa is completed (see FIG. 8C). In this case, the regions f3 and f4 on both side surfaces are short and do not overlap each other.
Then, the horizontal movement of the right side tacker 32A is also finished and returned to the initial position. Further, the paddle mechanism 10 is conveyed and stopped until it reaches a position coaxial with the center line O so that the next paddle mechanism 10 can receive the next integrated unit B by the elevator 8.
[0023]
In FIG. 2, when the paddle mechanism 10 that holds the stacking unit B in the body-wound state stops at the next transport position, the primary heater 24 comes into contact with the joint fa of the film f and thermobonds the joint fb to temporarily fix it. To do. Further, when the paddle mechanism 10 that holds the 1-pitch stacking unit B to the next transport position is sent and stopped, the secondary heater 25 comes into contact with the joint fb of the film f and is finally fixed by thermocompression bonding. In the process in which the body-wound integrated unit B is intermittently conveyed, the regions f1 and f2 on the upper and lower surfaces of the flap fa are also folded on the regions f3 and f4 on the left and right side surfaces already folded on the end surface Ba. Complete the packaging.
In this way, the integrated unit B is sequentially held by the paddle mechanism 10 and intermittently conveyed while the body winding and the flap fa are folded, so that the integrated unit B is tightly formed by the film f without causing wrinkles, displacement, elongation, or the like. Can be packaged automatically.
[0024]
As described above, according to the packaging device 6 according to the present embodiment, even if a soft film such as a polyethylene film is used as the film f, the adsorber after the area f1 on the upper surface of the flap fa is folded and folded. 26, the left and right side regions f3, f4 are folded and the flap regions f1, f3, f4 are controlled without making them free, so that the folding is finished neatly without any wrinkles or bending. Moreover, since the upper surface area f1 of the flap fa is held and moved in a non-contact manner by the adsorber 26 with a weak adsorbing force, when the upper surface area f1 is folded or caused, the film is wrinkled, scratched or deformed. Etc. does not occur. In addition, when the film f is moved together with the integrated unit B, the movement resistance due to the adsorption force is small, and the film f can be moved without deforming the film by the adsorption force without causing wrinkles or scratches. Since the adsorber 26 adsorbs the film f with a weak air current, it is not necessary to use high-pressure air, and the film f can be prevented from being ramped or bent by the air current.
[0025]
In the above-described embodiment, when the region f1 on the upper surface of the flap fa is raised and the regions f3 and f4 on both sides are folded, the one side tacker 32A and the integrated unit B are moved at different speeds, and the other side tacker is moved. Although 32B is set in a stationary state, the stacking unit B may be held in a stationary state, and both side tackers 32A and 32B may be moved in the abutting direction to be folded.
Further, in the above-described embodiment, in the flap fa of the film f in the body-folded state, the regions f1 and f4 on both side surfaces are folded back and forth or simultaneously with the upper surface region f1 retracted upward by the suction device 26. However, only the region on one side surface may be folded. In this case, either the stacking unit B or the side tacker 32 may be moved, or both may be moved in the same direction at different speeds.
Further, the side tacker 32 is used as the folding member to move horizontally along the end faces Ba, Ba, but the present invention is not limited to such a configuration, and the adsorber 26 may be employed as the folding member. Also in this case, by moving the suction unit 26 relative to the integrated unit B, the side regions f3 and f4 of the flap fa can be pulled while being sucked and folded onto the end surfaces Ba and Ba.
[0026]
Further, in the above-described embodiment, the area f1 and the like on the upper surface of the flap fa are non-contact-adsorbed by one adsorber 26, but may be held by a plurality of adsorbers 26 as shown in FIG. Good. In particular, when the workpiece has a wide and instep shape, the overhanging flap also has a large area, which is effective for holding and folding the flap.
Further, as the film f, a work-cured film such as paper or OPP may be used instead of the above-mentioned unstretched plastic film, and these films and paper constitute a packaging sheet.
In addition, the work to be transported in the present invention is not limited to the stacking unit B of the tissue box b, and can be applied to various articles. Moreover, it is not limited to the thing which accumulated several articles | goods, The same packaging can be performed also with a single article | item.
[0027]
【The invention's effect】
  As described above, according to the present inventionPackaging equipmentFolding operation can be performed without making multiple areas of the flap free, so even if the packaging sheet is a soft film etc., it can be wrapped neatly without the flap being bent or wrinkled . Moreover, a fold can be formed by once folding one area of the flap, and the folding is further improved.In addition, the other area can be smoothly folded by the interlocking mechanism.
[Brief description of the drawings]
FIG. 1 is a perspective view for explaining an outline of a process for packaging each integrated unit in an integrated packaging machine including a packaging device according to an embodiment of the present invention.
FIG. 2 is a main part configuration diagram of a paddle mechanism of a packaging device.
FIG. 3 is a front view of a main part of a folding mechanism of the packaging device.
4 is a plan view of an essential part of the folding mechanism shown in FIG. 3. FIG.
FIG. 5 is a waist cross-sectional view showing a configuration of an adsorber.
FIG. 6 is a perspective view showing an integrated unit in a body-wound state.
7A, 7B, and 7C are diagrams illustrating a cam member conveyance process, a contact state between a cam follower and a cam surface, and a rotation state of an adsorber in each process.
FIGS. 8A, 8B, and 8C are diagrams showing the movement positions of the side tacker for folding the regions on both side surfaces of the flap.
FIG. 9 is a view showing a state in which the end surface of the integrated unit is pressed by a plurality of adsorbers via flaps in the packaging device according to the modification of the present invention.
[Explanation of symbols]
2 Stacking and conveying device
6 Packaging equipment
9 Elevator
10 Paddle mechanism (holding means)
13 Upper paddle (holding means)
18 Bottom tacker (guide member)
23 Folding mechanism
24 Rotating shaft
26 Adsorber
30 Cam follower (interlocking mechanism)
32, 32A, 32B Side tacker (folding member)
36 Cam member (interlocking mechanism)
37 Cam surface (interlocking mechanism)
B Integrated unit (work)
f Film (packaging sheet)
f1 Upper surface area (one area)
f3 Right side area (other areas)
f4 Left side area (other areas)
Ba end face

Claims (4)

In a packaging apparatus in which a workpiece partially wrapped with a packaging sheet is held by a holding means, and a flap of a packaging sheet extending outward from the end surface of the workpiece is folded into the end surface of the workpiece,
An adsorber that adsorbs one area of the flap, a folding member that folds the other area of the flap into the end face of the work, and an operation that folds the other area of the flap into the end face of the work with the folding member. And an interlocking mechanism for separating the suction device from the end surface of the workpiece ,
The interlocking mechanism includes a cam member that has a cam surface and moves together with the folding member, and a cam follower that abuts the cam surface of the cam member and interlocks the suction unit, and moves the folding member. A packaging device characterized in that the adsorber is separated from the end face of the workpiece via a cam follower linked to the workpiece .   The suction unit is configured to adsorb and hold one area of the flap in a non-contact manner and to allow relative movement of the flap while suppressing deformation of the one area of the flap in the adsorbed state. Item 4. The packaging device according to Item 1.   3. The suction device according to claim 1, wherein the suction unit is disposed at a position where one region of the flap is folded into an end surface of the workpiece with respect to a relatively folded or folded workpiece. The packaging device described. The adsorber disposed opposite, to claim 1, characterized in that so as to sandwich the opposite end faces of the packaging sheet fitted partially packaged workpiece between adsorber that these opposing 4. The packaging device according to any one of 3 .

Images