JP2010018366A - Carton sealer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a carton sealer capable of sticking an adhesive tape to a flap of a carton to easily peel the adhesive tape when opening the carton. <P>SOLUTION: In this carton sealer, a lead part of the adhesive tape is sucked in a groove of a suction head by applying pressure reduction by a suction mechanism provided with a suction head which has a groove of a length longer than a width of the adhesive tape on a side opposed to the adhesive tape in a width direction, a suction port at the depth of the groove and guard members at both ends of the width direction, has a space between distal ends of the guard members wider than the length of the groove and accepts the adhesive tape between the guard members, and a pressure reduction means capable of reducing pressure in the groove by transmitting pressure reduction to the suction port of the suction head to a non-adhesive surface side of the lead part of the adhesive tape; and the adhesive tape is cut before and after the suction. As a result, a folded-back can be made in the lead part of the adhesive tape. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a carton sealer, and more particularly, to a carton sealer for bonding folded flaps in a carton with an adhesive tape in order to wrap a carton made of cardboard.

For packaging cardboard cartons, a method is generally used in which a package is stored in an opened carton, the flaps are folded down, and the flaps are joined together with an adhesive tape and sealed.
For example, as an apparatus for sealing a carton, a sticking roller that is removably attached to a carton transport path and guides an adhesive tape, and a transport path downstream of the sticking roller with respect to the transport path An adhesive tape lead portion provided with a pressing roller attached in a retractable manner and a tape cutter located between the sticking roller and the pressing roller, when the front side of the carton conveyed to the sticking roller comes into contact Is attached to the flap on the top, bottom or side of the carton, and the adhesive tape is attached to the rear end of the carton to be transported. The adhesive tape is cut by the tape cutter around the end, and the pressure roller removes the tail of the adhesive tape after the carton. It is known a structure for pressing the face.

In such a conventional sealing method, since the lead portion and tail portion of the adhesive tape are attached to the front side surface and the rear side surface of the carton up to the cut edge, the adhesive tape is turned over when opening the carton. It was difficult to remove.
Therefore, as a means for eliminating such inconvenience, a method of packing a corrugated cardboard box or the like with an adhesive tape in which a wire for opening is stuck along the length direction at substantially the center in the width direction of the adhesive surface (Patent Document 5). It has been known. However, since a wire for opening is required in addition to the adhesive tape, there is a drawback that the cost of the packaging material is increased.

On the other hand, by folding back the ends of the adhesive tape where the flaps of the carton are joined together, the adhesive surfaces are bonded together to form a non-adhesive part (tab) at the end of the adhesive tape. Means are known to enable easy tearing off.
As a method of providing folding at the end of this adhesive tape, for example, in Patent Document 1, the adhesive tape is cut with a tape cutter while sucking and holding the non-adhesive surface side of the expected folding portion of the adhesive tape with a tape suction tool. Then, by rotating the suction tool in the direction of folding while holding the portion to be folded back, the portion to be folded is folded back to the folding receiving portion connected to the portion to be folded, and the folded portion is bonded to each other by sticking the adhesive surfaces together. A method of forming is described.

  In Patent Document 2, the non-adhesive surface side of the lead part of the subsequent adhesive tape formed by cutting the adhesive tape joined with the flap of the preceding carton with a tape cutter is sucked with a suction head, and the adhesive tape is bent. A method is described in which the lead portion of the folded adhesive tape is pressed against the front side of the subsequent carton. The suction head in Patent Document 2 has a groove formed by two surfaces with a steep inclination angle at a portion where the adhesive tape is sucked, and a suction slit is provided at the back of the groove. The back of the suction slit is narrow. When the adhesive tape is sucked, the adhesive tape is sucked into a narrow space behind the suction slit, and the adhesive tape is folded back in the narrow space.

In patent document 3 and patent document 4, the non-adhesive surface side of the rear end part of the adhesive tape joined with the flaps was drawn with a suction device, the adhesive tape was cut with a tape cutter, the adhesive tape was folded, and bent A method is described in which the tail of the adhesive tape is pressed against the back side of the carton.
In the suction device in Patent Document 3, the part to which the adhesive tape is sucked is composed of a surface that is gently inclined from the front end toward the rear end, and a steep surface having a recess recessed at the rear end. It is biased toward the rear end side. When the adhesive tape is sucked, the adhesive tape is folded back on a steep surface having a recessed portion.
The suction device in Patent Document 4 is formed such that the inner back side of the suction nozzle is sharply wider than the nozzle opening, and the nozzle opening is biased toward the front end side of the adhesive tape. The tape is drawn into the inner space from the nozzle opening and folded back in the space.

JP 2002-326761 A JP-A-11-321817 U.S. Pat. No. 4,888,581 JP 2000-272609 A Japanese Patent Publication No. 6-29076

However, in the apparatus or method described in the above publication, if the adhesive tape cannot be folded back reliably and the carton is sealed with the adhesive tape that has not been folded back, the lead portion and tail portion of the adhesive tape are The cut edges of the carton are stuck to the front and rear sides of the carton, and when the carton is opened, the adhesive tape may be difficult to turn off.
SUMMARY OF THE INVENTION An object of the present invention is to provide a method and device for folding back the lead portion of an adhesive tape that can easily and reliably form a tab on the lead portion of the pressure-sensitive adhesive tape that is adhered to the carton, and to stick the adhesive when the carton is opened. It is to provide a carton sealing method and a carton sealer capable of sticking an adhesive tape to a carton flap so that the tape can be easily peeled off.

  As a result of intensive studies to achieve the above object, the present inventor has a groove having a length longer than the width of the adhesive tape in the width direction on the side facing the adhesive tape, and a suction port at the back of the groove. A suction head having guard members at both ends in the width direction, the gap between the tips of the guard members being wider than the length of the groove, and receiving the adhesive tape between the guard members; It is found that when the adhesive tape is folded back by the pressure reduction by the suction mechanism that can reduce the pressure in the groove by transmitting the pressure to the suction port of the suction head, the tab can be easily and reliably formed. When the carton flap was joined using the obtained adhesive tape, it was found that when the carton was opened, a packaged carton that could be easily peeled off was obtained. As a result of further studies based on these findings, the present invention has been completed.

  That is, the present invention has a groove having a length longer than the width of the adhesive tape on the side facing the adhesive tape in the width direction, a suction port at the back of the groove, and guard members at both ends in the width direction. A suction head having a gap between the tips of the guard members that is wider than the length of the groove and receiving an adhesive tape between the guard members; Apply pressure reduction by a suction mechanism equipped with a pressure reducing means that can reduce the inside to the non-adhesive surface side of the lead part of the adhesive tape and suck the lead part of the adhesive tape into the groove of the suction head. Cutting the adhesive tape to make a fold on the lead portion of the adhesive tape, and

  A groove having a length longer than the width of the adhesive tape is provided in the width direction on the side facing the adhesive tape, a suction port is provided at the back of the groove, and guard members are provided at both ends in the width direction. The suction head is wider than the groove length so that the adhesive tape can be received between the guard members, and the reduced pressure is transmitted to the suction port of the suction head to reduce the pressure in the groove. A suction mechanism having a pressure reducing means capable of; a tape cutter, and applying pressure reduction by the suction mechanism to the non-adhesive surface side of the lead portion of the adhesive tape to suck the lead portion of the adhesive tape into the groove of the suction head; This is a device for folding back the lead portion of an adhesive tape, which can cut the adhesive tape with a tape cutter before and after suction.

  In the folding method and the folding device, the lead part of the adhesive tape is preferably folded so that the end of the lead part is adhered to the adhesive surface of the adhesive tape to form a cylinder.

  The present invention has a groove having a length longer than the width of the adhesive tape on the side facing the adhesive tape in the width direction, a suction port at the back of the groove, and guard members at both ends in the width direction. The gap between the tips of the guard members is wider than the length of the groove, and a suction head adapted to receive the adhesive tape between the guard members; Apply pressure reduction by a suction mechanism equipped with pressure reducing means that can reduce the pressure to the non-adhesive surface side of the lead part of the adhesive tape, suck the lead part of the adhesive tape into the groove of the suction head, and before and after that suction By cutting the adhesive tape, the lead part of the adhesive tape is folded, the lead part of the adhesive tape that has been folded is attached to the front side of the carton, and then reaches the rear side of the carton through the flap bonding area Pasted Method of sealing a carton comprising adhering the adhesive tape in the region, and

  An adhesive tape supply mechanism; for adhering the adhesive tape supplied from the adhesive tape supply mechanism to an adhesion area extending from the front side surface of the carton to be conveyed to the rear side surface of the carton through a joining area extending in the conveyance direction; A tape adhering mechanism; a tape cutter for cutting the adhered adhesive tape; and a suction mechanism for forming a fold in the lead portion of the subsequent adhesive tape formed by cutting with the tape cutter; The suction mechanism includes a decompression unit and a suction head, and the suction head has a groove having a length longer than the width of the adhesive tape on the side facing the adhesive tape in the width direction. And a guard member at both ends in the width direction, the interval between the tips of the guard member is wider than the length of the groove, and the adhesive tape can be received between the guard members. Further, the pressure inside the groove can be reduced by transmitting the pressure by the pressure reducing means to the suction port of the suction head, and after the adhesive tape is pasted from the front side surface of the carton to be conveyed to the joining area extending in the conveying direction. In addition, before sticking the adhesive tape on the rear side of the carton, the pressure by the suction mechanism is applied to the non-adhesive surface side of the lead part of the subsequent adhesive tape, and the lead part of the subsequent adhesive tape is sucked into the groove of the suction head. The carton sealer is capable of making a fold at the lead portion of the subsequent adhesive tape by cutting the adhesive tape with a tape cutter in tandem with the suction.

  In the carton sealing method and the carton sealer, the adhesive tape supply mechanism comprises an adhesive tape winding body and one or more guide rollers for guiding the adhesive tape fed from the winding body. At least one of them is preferably provided with rims at both ends thereof, and an adhesive tape can be wound between the rims. This guide roller can suppress the meandering of the adhesive tape. Moreover, it is preferable that the lead part of the adhesive tape is folded so that the end of the lead part adheres to the adhesive surface of the adhesive tape to form a cylinder.

It is preferable that the carton sealer of the present invention further includes a roller for crushing the folding of the lead portion of the adhesive tape attached to the front side surface of the carton to be conveyed. By sticking the turn using this roller, the adhesive surfaces can be securely attached to each other.
Moreover, it is preferable that the pressure reduction which acts on a suction head is 200-250 mmHg (26664.4-33330.5Pa) of vacuum degree. By setting the degree of vacuum within this range, the suction of the adhesive tape is ensured and the folding failure can be eliminated.

  According to the folding method and folding device for the lead part of the adhesive tape according to the present invention, the tab can be easily and reliably formed on the lead part of the adhesive tape that is stuck to the carton. According to the carton sealing method and the carton sealer according to the present invention, the adhesive tape can be attached to the carton flap so that the adhesive tape can be easily removed when the carton is opened.

  The reason for the effect of the present invention is not clear, but the following reasons are conceivable. When the wound body of the adhesive tape rotates and the adhesive tape is fed out, the position in the width direction of the wound body swings. As a result, the position in the width direction of the adhesive tape attached to the carton meanders. In the conventional sealing method or sealer, it is considered that the suction force of the suction device with respect to the adhesive tape varies in the width direction due to the meandering of the adhesive tape in the width direction.

  In the folding method, the folding device, the carton sealing method, and the carton sealer of the present invention, a groove having a length longer than the width of the adhesive tape is provided in the width direction on the side facing the adhesive tape, and a suction port is provided at the back of the groove. A suction head having a guard member at both ends in the width direction, the gap between the ends of the guard member being wider than the length of the groove, and receiving the adhesive tape between the guard members. Used. The position in the width direction of the adhesive tape is reliably regulated by a special structure such as a guard member in the suction head, and meandering is suppressed. As a result, it is presumed that the tab can be surely formed. Further, by providing rims at both ends of at least one guide roller in the adhesive tape supply mechanism, the position in the width direction of the adhesive tape is reliably regulated. As a result, it is presumed that the certainty of tab formation is greatly improved.

The present invention will be specifically described. FIG. 1 is an explanatory diagram showing an outline of a configuration according to an example of the carton sealer of the present invention.
In the figure, 10 is a carton sealer, C is a carton to be packaged, 11 is an adhesive tape winding body constituting an adhesive tape supply mechanism, and 12, 13 and 14 are guide rollers. The carton sealer 10 of this example joins the flaps by adhering an adhesive tape to the sealing portions of the two flaps folded to form the top surface of the carton C.

  The carton C is transported from right to left in this figure on a transport path 39 extending in the horizontal direction including a transport mechanism including a belt (not shown) and a rotatable sliding roller. The adhesive tape winding body 11 is wound in a roll shape so that the non-adhesive surface becomes the outer surface, and is supported by a tape reel (not shown) that is rotatable in the feeding direction and prohibited from rotating in the reverse direction. Yes. The adhesive tape T fed out from the adhesive tape winding body 11 is supplied to the tape adhering mechanism via the guide rollers 12, 13 and 14.

  At least one of the guide rollers is preferably provided with rims at both ends so that an adhesive tape can be wound between the rims. In particular, it is preferable that the guide roller 12 that comes into contact with the first part of the adhesive tape fed out from the adhesive tape winding body 11 is provided with rims at both ends. The shape and size of the rim provided at both ends are not particularly limited. For example, FIG. 8 is a diagram illustrating an example of the guide roller 112 having rims 112R at both ends. The guide roller 112 in FIG. 8 is an integral body of the roller body 112M and the rim 112R, and can rotate around the support shaft 112C. The guide roller 112 is attached with a rim 112R whose diameter increases toward the end. The adhesive tape is applied to the roller body 112M between the rims 112R. For example, when an adhesive tape having a width of 50 mm is used, the length of the roller body is preferably 50.5 to 53.0 mm.

  The tape sticking mechanism includes a front press mechanism having a sticking roller 25 and a rear press mechanism having a press roller 35. The front presser mechanism includes a rotating plate 24. The rotating plate 24 has a main portion extending in the advancing direction of the carton C and a tip portion extending downward from the tip, and the main portion is horizontal. A sticking roller 25 is rotatably supported around the support shaft 22 and is rotatably supported at the tip. In a free state where the carton C is not in contact, the affixing roller 25 is restrained to be positioned at a level below the top surface of the carton C moving forward by a spring (not shown).

  The rear presser mechanism includes a rotating plate 34. The rotating plate 34 has a main portion extending in the direction opposite to the advancing direction of the carton C and a tip portion extending downward from the tip, and the main portion is horizontal. The support shaft 32 is rotatably provided around the support shaft 32, and a pressing roller 35 is rotatably supported at the tip portion.

  The rotation plate 24 of the front pressing mechanism and the rotation plate 34 of the rear pressing mechanism are such that the affixing roller 25 and the pressing roller 35 are both held at the same level, and when one of them is raised or lowered, the other is the same. They are connected so as to rise and fall. Therefore, in the free state where the carton C is not in contact with the sticking roller 25, the rear pressing mechanism is positioned at a level below the top surface of the carton C where the pressing roller 35 moves forward by the spring acting on the front pressing mechanism. Is held so.

  The tape cutting mechanism has a swing plate (not shown). A tape cutter 45 having, for example, a serrated cutting blade at the lower edge is fixed to the tip of the swing plate, and is located near the upstream side of the tape cutter 45 (the direction opposite to the forward direction of the carton C). A suction head 50 is arranged. The swing plate operates in relation to the operation of the rotary plates 24 and 25 described above.

  FIG. 5 is a conceptual diagram showing the periphery of the suction head 50. In this suction head 50, for example, in an aluminum metal block (head body) 51, a groove 52 is formed on the lower surface substantially parallel to the tape width direction (in the direction perpendicular to the paper surface in FIG. 5). A suction port 51P and a suction tube 54 extending upward are formed. The suction pipe 54 is connected to decompression means such as a vacuum pump (not shown). In the illustrated example, the inlet-side and outlet-side wall surfaces 53 and 53 of the groove 52 of the suction head 50 are both curved in a smooth arc shape.

The shape, depth and opening width of the groove 52 in the suction head 50, the size of the pressure reducing action to be applied, the positional relationship with the tape cutter 45, and the like depend on the type and size of the adhesive tape used and other conditions. It is set in a wide range.
The length of the groove 52 is longer than the width of the adhesive tape so that the entire width of the adhesive tape is sucked into the groove. For example, in a 50 mm wide adhesive tape, the groove length is preferably 52 to 60 mm.

Guard members 51G are provided at both ends in the width direction of the suction head 50 (both ends of the groove). The distance between the tips of the guard member 51G is wider than the length of the groove 52. The adhesive tape T can be received between the guard members 51G. For example, FIG. 9 is a perspective view showing an example of a suction head. A suction tube 54 is connected to the suction port 51P so that the groove inside the suction head can be decompressed. The groove that is hidden behind the head main body and is not visible is provided on the lower surface of the head main body 51 and the caulking 51k shown in FIG. 9 with a length from the right end to the left end. At both ends of the suction head 50 in FIG. 9, guard members 51G whose intervals are widened toward the tip end portions are provided, and the adhesive tape T is received between the guard members 51G. When a 50 mm width adhesive tape is used, the distance between the tips of the guard members is preferably 57 to 66 mm, more preferably 58 to 64 mm. The guard member preferably has a height from the lower surface of the suction head of 3 to 10 mm. In the illustrated example, the guard member is a plate bent like a bow. However, the guard member is not limited to the plate as long as the distance between the tips is wider than the length of the groove and can accept the adhesive tape.
The suction port 51P may be a slit extending over the entire length direction of the groove, or may be a single hole or a plurality of holes arranged in the length direction of the groove. In the illustrated example, the caulking 51k is performed in the gap between the guard member 51G and the head main body 51, but other means can be used as long as the variation in the pressure reducing action of the groove 52 can be reduced and maintained high. May be. For example, both end surfaces of the head main body 51 may be inclined so as to match the shape of the guard member 51G. In addition, it is preferable that the width | variety of the coking 51k is 0.5-5 mm, and it is more preferable that it is 1-3 mm.

  The carton sealer 10 illustrated in FIG. 1 includes a roller 36 on the most downstream side of the conveyance path for crushing the folding of the lead portion TL of the adhesive tape adhered to the front side surface of the carton C to be conveyed. The roller 36 is rotatably attached to the tip of the rotating body 37, and the rotating body 37 is rotatable around a horizontal support shaft 38.

  The operation of the carton sealer 10 having the above configuration is as follows. FIG. 1 shows a state immediately before the process for the preceding carton (not shown) is completed and the sealing process for the next carton C is started. In this state, the adhesive tape T is drawn from the tape winding body 11 and supported by the guide roller 14, so that the lead portion TL is suspended in front of the carton C, and the adhesive surface is It is set as the state which opposes the front side surface of the carton C, and the sticking roller 25 is located behind it.

  When the carton C moves forward by the action of the transport mechanism, the lead portion TL of the adhesive tape T is pressed against the front side surface by the sticking roller 25. In the illustrated example, the height of the affixing roller 25 when pressed against the front side of the carton C is slightly above the tip of the lead portion TL of the adhesive tape (specifically, the adhesive surface is exposed above the folded portion). Therefore, the folded portion of the lead portion TL of the adhesive tape is not crushed by the affixing roller 25. Subsequently, when the carton C advances, the affixing roller 25 is pushed by the advancement force of the carton C as the carton C advances, so that the rotating plate 24 of the front pressing mechanism is watched so that the tip part rises around the support shaft 22. Rotating in the direction, the affixing roller 25 rises while contacting the front side surface of the carton C, and the lead portion TL of the adhesive tape T is affixed to the front side surface of the carton C. Further, at this time, the rotating plate 34 of the rear pressing mechanism rotates in the counterclockwise direction so that the tip end portion rises around the support shaft 32 in conjunction with the sticking roller 25 (FIG. 2).

  Next, as shown in FIG. 2, when the front presser mechanism reaches the top surface of the carton C, as the carton C advances, the advancement force causes the adhesive tape T to be unwound from the tape winding body 11 and downward. Are sequentially pressed against the top surface of the carton C by the affixing roller 25 restrained by the above. Furthermore, pressing force is applied again to the adhesive tape T adhered to the joining area by the subsequent pressing roller 35, and the adhesive tape T is adhered to the joining area extending in the transport direction on the top surface of the carton C. To go. At this time, since the tape cutting mechanism is supported by the top surface of the carton C and is in the raised position, the tape cutter 45 located in the vicinity of the tip thereof is in an inoperative state with respect to the adhesive tape T. . Further, the suction head is also in the raised position and is in an inoperative state with respect to the adhesive tape T.

  When the carton C further moves forward and the tape cutting mechanism is disengaged from the rear end of the top surface of the carton C as shown in FIG. 5, the tape cutting mechanism is lowered and the tape cutter 45 attached to the front end is lowered. To do. The blade of the tape cutter 45 hits the adhesive tape T that is tensioned between the guide roller 14 and the pasting roller 25 and the preceding carton C, and the adhesive tape T is cut. As a result, the tail portion TT of the adhesive tape T is formed and the lead portion TH of the subsequent adhesive tape T is formed.

After that, as shown in FIG. 4, when the carton C further advances and the pressing roller 35 is removed from the rear end of the top surface of the carton C, the rotating plate 34 rotates clockwise, so that the pressing roller 35 Since the tail portion TT of the adhesive tape T is pressed against the rear side surface of the carton C, the tail portion TT is adhered to the rear side surface of the carton C.
Further, the roller 36 presses against the lead portion TL of the adhesive tape T, and crushes the lead portion TL against the front side surface of the carton C, thereby ensuring the folding of the lead portion TL. In the example shown in the drawing, the height of the roller 36 when pressed against the front side surface of the carton C is slightly lower than the leading end of the lead portion TL of the adhesive tape (specifically, the folded portion or slightly more than that). (Lower side), the folded portion that is cylindrical can be crushed. When the carton C advances, the rotating body 37 rotates clockwise around the support shaft 38, and the roller 36 is pushed up to the top surface while contacting the front side surface of the carton C. When the carton C passes, the rotating body 37 rotates counterclockwise and the roller 36 is lowered to the original position.

  On the other hand, as shown in FIGS. 5 and 6, the suction head is lowered simultaneously with the lowering of the tape cutter 45. The groove 52 on the lower surface of the suction head 50 faces the non-adhesive surface of the lead portion TH of the subsequent adhesive tape. In parallel with the cutting of the adhesive tape T by the tape cutter 45, pressure reduction is applied to the suction head 50 via a suction pipe 54 from a pressure reduction means (not shown). The applied reduced pressure is applied to the groove 52 through the suction port, and as shown in FIG. 6, the lead portion TH is drawn into the groove 52 and folded back in the middle of the lead portion TH. The tension is released by cutting with a tape cutter, and the end HE of the lead part, which is the free end, swings from the left to the right in the figure and contacts the adhesive surface of the lead part TH, and the cylinder is attached to the lead part. It is formed. The outer surface of the folded back (cylinder) is a non-adhesive surface.

  Thereafter, when the pressure reducing action is stopped, the lead portion TH of the adhesive tape T on which the folded (cylinder) 60 is formed falls from the suction head 50 and is put into a predetermined posture for sealing the next carton by the guide roller 14. Is retained (FIG. 7).

  In this way, the adhesive tape T applied to the next carton has a folded end 60 having a non-adhesive outer surface formed at the tip thereof. Therefore, a carton package-sealed by the adhesive tape T having the folded-back 60 can peel off the adhered adhesive tape T in its length direction by picking the folded-back 60 when opening the carton. Can do.

In the above, the magnitude of the reduced pressure applied to the suction head 50 differs depending on the type of adhesive tape T to be applied, the size of the width, and other conditions. 100 to 300 mmHg (13332.2 to 39996.6 Pa) is preferable, and 200 to 250 mmHg (26664.4 to 33330.5 Pa) is more preferable. Further, the dimension of the opening width d of the groove 52 of the suction head 50 is preferably 1 to 5 mm, for example. If this opening width is large, the degree of pressure reduction to be applied may be increased. The length of the folded back 60 of the adhesive tape T varies depending on the distance between the cutter 45 and the suction head 50, the depth and shape of the groove 52, and other conditions, and is adjusted by selecting appropriate conditions. be able to.
The length of the turn 60 is sufficient if it is in the range of 5 to 15 mm, for example. In this case, the depth of the groove is preferably 5 to 15 mm.

  Although a specific example of the present invention has been described above, various changes can be made in the present invention. For example, the specific configuration of the carton sealer body is not limited to the example shown in the figure. In addition, the present invention can be similarly applied to the case where the bonding region to which the adhesive tape is to be attached is located not only on the top surface of the carton but also on the side surface or the bottom surface.

Example Using the carton sealer having the structure shown in FIG. 1, the top surface flap of a corrugated carton having a length of 430 mm, a width of 310 mm, and a height of 220 mm was joined with an adhesive tape having a width of 50 mm.
The suction head 50 has the structure shown in FIG. 9 (suction head body: width 53 mm, height 21 mm, depth 15 mm, the width direction of the suction head and the length direction of the groove are the width direction of the adhesive tape). The caulking thickness is 2.5 mm each on the left and right, the groove length is 58 mm, the groove depth is 10 mm, the groove opening width is 2 mm, the distance between the guard member tips is 62 mm, and the height of the guard member from the lower surface of the suction head The diameter of the suction port is 1/4. A 12 mmφ tube was connected to the suction port and connected to a suction pump.
As the guide roller 12, a rim-equipped roller 112 having a structure shown in FIG. 8 (the length of the roller body 51 mm) was used. As the guide rollers 13 and 14, a roller cylinder having a length of 51 mm was used.
Of the 4762 cartons that were packed with the carton sealer, the number of defects in the folded back (tab) of the lead portion of the adhesive tape was four.

Comparative Example FIG. 10 is an explanatory diagram showing an outline of a configuration according to an example of a suction head used in a conventional carton sealer. The suction head 150 has the same structure as the suction head 50 shown in FIG. 9 except that a side plate 151S having a thickness of 1.5 mm is attached instead of the guard member 51G and the coking 51k is not formed. . The head main body 151 has a width of 53 mm, a height of 21 mm, and a depth of 15 mm. The width direction of the suction head and the length direction of the groove are the width direction of the adhesive tape. The groove length is 53 mm, the groove depth is 10 mm, the groove opening width is 2 mm, the interval between the side plate tips is 53 mm, and the height of the side plate 151S from the lower surface of the suction head is 4 mm. The diameter of the suction port 151P is 1/8. A 10 mmφ tube was connected to the suction port and connected to a suction pump.
In the comparative example, the suction head 150 was used instead of the suction head 50 in the carton sealer having the structure shown in FIG. As the guide rollers 12, 13, and 14, a cylindrical roller having a roller body length of 51 mm was used.
Of the 1192 cartons packed by the carton sealer, the number of defects in the folded back (tab) of the lead portion of the adhesive tape was 178.

Explanatory drawing which shows the outline of the structure which concerns on an example of the carton sealer of this invention (state just before a sealing process start) Explanatory drawing which shows the outline of the structure which concerns on an example of the carton sealer of this invention (The state which has sealed the carton top | upper surface) Explanatory drawing which shows the outline of the structure which concerns on an example of the carton sealer of this invention (state just before adhesive seal cutting | disconnection) Explanatory drawing which shows the outline of the structure which concerns on an example of the carton sealer of this invention (state of sealing process completion) Explanatory drawing which shows the outline of the structure which concerns on an example of the folding | turning apparatus of the lead | read | reed part of the adhesive seal of this invention (state immediately after adhesive seal cutting | disconnection) Explanatory drawing which shows the outline of the structure which concerns on an example of the folding | turning apparatus of the lead | read | reed part of the adhesive seal of this invention (state at the time of adhesive seal suction) Explanatory drawing which shows the outline of the structure which concerns on an example of the folding | turning apparatus of the lead | read | reed part of the adhesive seal | sticker of this invention (state at the time of adhesive seal | sticker folding completion) Explanatory drawing which shows the outline of the structure which concerns on an example of the guide roller used for the carton sealer of this invention. Explanatory drawing which shows the outline of the structure which concerns on an example of the suction head used for the carton sealer of this invention. Explanatory drawing which shows the outline of the structure which concerns on an example of the suction head used for the conventional carton sealer.

Explanation of symbols

10: Carton sealer C: Carton T: Adhesive tape TL: Adhesive tape lead portion TT: Adhesive tape tail portion TH: Subsequent adhesive tape lead portion HE: Adhesive tape lead end 11: Adhesive tape ridge Rolls 12, 112, 13, 14: Guide roller 25: Pasting roller 35: Pressing roller 45: Tape cutter 50: Suction head 60: Folding

Claims (9)

A groove having a length longer than the width of the adhesive tape is provided in the width direction on the side facing the adhesive tape, a suction port is provided at the back of the groove, and guard members are provided at both ends in the width direction. The suction head is wider than the groove length and can receive the adhesive tape between the guard members, and the reduced pressure can be transmitted to the suction port of the suction head to reduce the pressure in the groove. Apply pressure reduction by suction mechanism equipped with pressure reducing means to the non-adhesive surface side of the lead part of the adhesive tape, suck the lead part of the adhesive tape into the groove of the suction head, and cut the adhesive tape before and after the suction A method of making a fold in the lead portion of the adhesive tape.   The method of making a fold on the lead portion of the adhesive tape according to claim 1, wherein the lead portion of the adhesive tape is folded by sticking the end of the lead portion to the adhesive surface of the adhesive tape to form a cylinder. A groove having a length longer than the width of the adhesive tape is provided in the width direction on the side facing the adhesive tape, a suction port is provided at the back of the groove, and guard members are provided at both ends in the width direction. The suction head is wider than the groove length and can receive the adhesive tape between the guard members, and the reduced pressure can be transmitted to the suction port of the suction head to reduce the pressure in the groove. A suction mechanism comprising a pressure reducing means capable of;
With a tape cutter,
The pressure reduction by the suction mechanism is applied to the non-adhesive surface side of the lead part of the adhesive tape, the lead part of the adhesive tape is sucked into the groove of the suction head, and the adhesive tape can be cut with a tape cutter before and after the suction. A device for folding the lead part of adhesive tape. An adhesive tape supply mechanism; for adhering the adhesive tape supplied from the adhesive tape supply mechanism to an adhesion area extending from the front side surface of the carton to be conveyed to the rear side surface of the carton through a joining area extending in the conveyance direction; A tape adhering mechanism; a tape cutter for cutting the adhered adhesive tape; and a suction mechanism for forming a fold in the lead portion of the subsequent adhesive tape formed by cutting with the tape cutter;
The suction mechanism includes a decompression unit and a suction head, and the suction head has a groove having a length longer than the width of the adhesive tape on the side facing the adhesive tape in the width direction. Have a suction port and guard members at both ends in the width direction, the distance between the tips of the guard members is wider than the length of the groove, and the adhesive tape can be received between the guard members. The decompression means can transmit the decompression to the suction port of the suction head to decompress the inside of the groove,
And after sticking the adhesive tape from the front side of the carton to be transported to the joining area extending in the transport direction and before sticking the adhesive tape to the rear side of the carton, the vacuum of the subsequent adhesive tape is reduced by the suction mechanism. By acting on the non-adhesive surface side of the lead part, the lead part of the subsequent adhesive tape is sucked into the groove of the suction head, and the adhesive tape is cut with a tape cutter at the same time as the suction, to the lead part of the subsequent adhesive tape. Carton sealer that can make a wrap.   The adhesive tape supply mechanism includes a wound body of the adhesive tape and one or more guide rollers for guiding the adhesive tape fed out from the wound body, and at least one of the guide rollers is provided with rims at both ends thereof. The carton sealer according to claim 4, wherein the adhesive tape is wound around the rim.   The carton sealer according to claim 4 or 5, wherein the lead part of the adhesive tape is folded back so that the end of the lead part is adhered to the adhesive surface of the adhesive tape to form a cylinder.   The carton sealer according to any one of claims 4 to 6, further comprising a roller for crushing the return of the lead portion of the adhesive tape attached to the front side surface of the carton to be conveyed.   The carton sealer according to any one of claims 4 to 7, wherein the reduced pressure applied to the suction head is a vacuum degree of 200 to 250 mmHg. A groove having a length longer than the width of the adhesive tape is provided in the width direction on the side facing the adhesive tape, a suction port is provided at the back of the groove, and guard members are provided at both ends in the width direction. The suction head is wider than the groove length and can receive the adhesive tape between the guard members, and the reduced pressure can be transmitted to the suction port of the suction head to reduce the pressure in the groove. Apply pressure reduction by suction mechanism equipped with pressure reducing means to the non-adhesive surface side of the lead part of the adhesive tape, suck the lead part of the adhesive tape into the groove of the suction head, and cut the adhesive tape before and after the suction Fold the lead part of the adhesive tape,
A method for sealing a carton, comprising: attaching a lead part of a folded adhesive tape to a front side surface of a carton; and then adhering the adhesive tape to an adhesive region that reaches a rear side surface of the carton through a flap joining region.

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