JP4487165B2 - Bundling method for paper box and nozzle for applying adhesive to paper band used in the method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for bundling paper boxes such as cardboard boxes containing foods such as bag ramen and cup ramen, and a nozzle for applying an adhesive to a paper band used in the bundling method. Uses a paper band instead of the conventional PP band and stacks and bundles a plurality of paper boxes containing the food etc. in the vertical direction to facilitate carrying and simplify logistics, To reduce the separation and collection man-hours and waste and to contribute to environmental conservation, and to be able to reliably and easily apply an adhesive to the paper band. The present invention relates to a nozzle for applying an adhesive to a paper band.
[0002]
[Prior art]
Conventionally, when shipping a cardboard box as a paper box containing a plurality of foods such as bag ramen, cup ramen, potato chips, breakfast cereals, etc. Since the packed cardboard boxes are relatively light and portable, at least two of them are stacked one above the other, and a polypropylene band (hereinafter referred to as PP band) is attached around the stacked cardboard boxes and rolled up. The cardboard boxes are bundled together so as to prevent a load collapse during transportation of the plurality of cardboard boxes, and when the cardboard boxes are transferred to a transport means such as a truck or a conveyor or temporarily stacked and stored. Handle the part of the rolled PP band along the upper surface of the corrugated cardboard box by carrying it by hand or transporting it. It is aimed flights of.
[0003]
[Problems to be solved by the invention]
Thus, in reality, PP bands are widely used because of their cost and ease of use (bundling the ends of the bands by heat sealing). However, the movement of eliminating the PP band of the cardboard box bundling means is increasing due to the reduction of man-hours for separating and collecting waste, the reduction of garbage, and the increase in environmental conservation due to the recent implementation of the Containers and Packaging Recycling Law. Yes.
[0004]
The present invention has been made in view of the above-described problems caused by the conventional PP banding method, and facilitates carrying and simplification of logistics, as well as waste collection and man-hours. A method for binding paper boxes such as cardboard boxes that can reduce the amount of dust and can contribute to environmental conservation, etc., and an adhesive can be reliably and easily applied to the paper band. An object of the present invention is to provide a nozzle for applying an adhesive to a paper band that can easily bind boxes.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is configured as follows.
[0006]
(1) A method in which at least two relatively light paper boxes containing foods are stacked one above the other and bound together by a band,The stacked boxes weigh 4 to 15 kg,Paper band,In tension,Attached along the upper surface and both side surfaces of the uppermost box of the stacked box, between the side surfaces on both sides of the stacked box and the paper bandThe upper end of the side of the uppermost box and the lower end of the side of the lowermost box.Adhere with hot melt adhesive, At least part of the portion along the upper surface of the uppermost box on which the paper band is superposed is used as a non-adhesive part and a handle part of the superposed non-adhesive part. By applying a hot melt adhesive with an adhesive application nozzle and crimping the paper band with the adhesive application surface facing each side of both sides of the stacked box.The paper box was bundled.
[0007]
(2)It is a method of stacking at least two relatively lightweight paper boxes containing foods etc. on top and bottom and uniting them together with a band, and the stacked boxes have a weight of 4 to 15 kg,In a tensioned state, the paper band is attached along the upper surface of the uppermost box and the side surfaces on both sides of the stacked box,Between each side of both sides of the stacked box and the paper band,Upper edge of the side of the top boxAnd lower endAnd the side of the bottom boxAnd the upper end ofAdhere the lower end part with hot melt adhesive, At least part of the portion along the upper surface of the uppermost box on which the paper band is superposed is used as a non-adhesive part and a handle part of the superposed non-adhesive part. A hot melt adhesive is applied to the paper box by an adhesive application nozzle, and the paper box is bound by pressure bonding with the adhesive application surface of the paper band facing each side of both sides of the stacked box.I did it.
[0010]
(3) Nozzle body provided with an adhesive application nozzle to the paper band and an ejection hole for supplying and applying hot melt adhesive on one plane of the paper band which is branched from the adhesive supply passage and the supply passageHave, The nozzle bodyNisoInsidesoOf the spoutDirectly belowFree to rotateAnd slidable in the direction of the spoutA backup roller that is accommodated and attached and that feeds out the paper band while pressing it at a predetermined pressure between the opening of the ejection hole and its peripheral surfaceA mandrel that is screwed into the nozzle body, is urged upward in the direction of the jet outlet, and protrudes from the tip, is slidably built in the tip, and the tip of the mandrel is attached to the backup roller. Roller restraint for adjusting the pressing force to the paper band by supporting the backup roller by contacting the support shafts on both sides from below and adjusting the distance between the opening of the jet outlet and the peripheral surface of the backup roller.AndWhen the paper band is attached, the pressing force is applied evenly in the width direction of the paper band through the backup roller to the opening of the ejection hole and brought into contact with the opening.The configuration.
[0011]
(4)the above(3In the coating nozzle, a plurality of the nozzle holes are formed in the nozzle body at predetermined intervals in the direction along the width direction of the paper band. It was.
[0012]
(5)the above(4In the coating nozzle, the nozzle body is further formed with an adhesive protrusion groove having a vertical wall in contact with or close to both ends of the paper band in the width direction on the wall surface where the ejection hole opens. did.
[0013]
(6)the above(3In the coating nozzle, the opening of the adhesive is formed in a slit shape in the direction along the width direction of the paper band, and the opening of the spray hole is substantially from the wall surface of the coating nozzle body. It is formed at the apex of the protruding wall formed in an inverted triangular shape and rounded at the tip, and the paper band is sent close to or in contact with the apex portion.
[0015]
[Action]
  In the configuration of (1) above, for example, corrugated cardboard boxes are vertically arranged as a relatively light paper box in which a plurality of food items such as bag ramen, or a plurality of articles such as medicines and pharmaceuticals are packed and contained and packaged. At least two, stacked,The stacked boxes weigh 4 to 15 kg,A paper band is abutted along the upper surface of the uppermost box of each of the stacked boxes and the side surfaces of both sides thereof, and the paper band is connected to each side surface of both sides of the stacked boxes. whileThe upper end of the side of the uppermost box and the lower end of the side of the lowermost boxAre bonded by a hot melt adhesive. Thereby, a plurality of cardboard boxes are bundled together via the paper band.
[0016]
  Since the cardboard box is relatively light, the paper band is located between each side of the stacked boxes and the paper band.The predetermined position ofWhat is necessary is just to adhere | attach with a hot-melt-adhesive. Both the paper band and the cardboard box are flexible and flexible, and even if there is no gap between the top surface of the cardboard box and the paper band, a human hand can be inserted with an appropriate force. In addition, the bundled cardboard boxes can be easily carried by using the paper band portion along the upper surface of the uppermost cardboard box as a handle portion (gripping portion). In this case, it can be carried down with both left and right hands.
[0017]
  When bonding cardboard boxes and paper bands, hot melt adhesives areBy glue application nozzleApply to paper band sideBe done. In addition, the adhesive is used in consideration of the size and weight of the cardboard boxes to be bound and the strength of the paper band.InIntermittently appliedBe. Of course, a paper band having a strength (tensile strength) in consideration of the weight of the cardboard boxes to be superposed is selected. Moreover, the thing with the width | variety which is easy to hold and carry around with a human hand is suitable.
[0018]
  The paper band is wound around the entire circumference of the stacked cardboard boxes and bundled.rather thanAs described above, the amount of paper band used by attaching and bonding the side surfaces of the paper band and the corrugated cardboard box along the upper surface of the uppermost box and the side surfaces of the both sides. Is reduced.
[0019]
Thus, in the method of binding paper boxes such as cardboard boxes according to the present invention, the paper box and the paper band, i.e., the papers are bonded to each other with a hot-melt adhesive by using the paper band, and the bonding is easy. Surely done. Further, even when the paper box is unbound and the paper box and the band are discarded, there is no need to separate and dispose of the PP and the paper box as in the case of the conventional PP band. Further, the separation and collection as waste is not complicated, and even when discarded or recycled as waste and reused, the paper box and the paper band can be disposed together, and the number of separation and collection man-hours is reduced. Moreover, it can be disposed of as general waste and does not pollute the global environment.
[0020]
On the other hand, even when the band itself is lightweight and grips, it can be softly adapted to human hands and is suitable as a material for binding, gripping and carrying cardboard boxes. Moreover, even when folded and folded and disposed of like an elastic PP band, it is not bulky and leads to a reduction in dust. In the present invention, examples of the paper box include a cardboard box, a cardboard box, and other general paper boxes.
[0021]
And this(1Configuration ofThenFor example, when a cardboard box as a bundled multi-stage paper box is transported with the paper band of the portion along the upper surface of the uppermost box as the handle partInThe paper band is in tension, that is, tightly stretched, attached along the upper surface and both sides of the uppermost box, and the side surface of the paper band and uppermost box. And the paper band of the handle portion of the uppermost box by being adhered between the side surface between the paper band and the side surface of the lowermost box and the lower end portion of the paper band. Is prevented as much as possible from being loosened and stretched into a mountain shape, thereby preventing the adhesion of the uppermost box to the paper band as much as possible and preventing the weight acting on the lowermost box from being reduced. By taking charge at the bonding portion of the lower end portion of the paper band located on the side of the box, even if the weight of the upper box acts on the lowermost box, peeling of the bonding portion is effectively prevented. Furthermore, the amount of adhesive used is reduced by bonding the minimum necessary portions.
[0022]
AlsoThe paper band along the upper surface of the uppermost box makes at least a part of the upper surface non-adhesive, so that it can be used effectively as a grip when carrying, and in the case of a box with a wide upper surface, The phenomenon that the grip portion of the paper band along the upper surface of the box extends in a mountain shape is reduced as much as possible by adhering both end portions while leaving the central portion as the grip portion in the width direction of the box along the band.
[0023]
furtherBecause the hot melt adhesive is applied to the paper band side using an application nozzle, the box and paper band are bonded to each other, making it easy to apply the adhesive to the paper band by changing the size of the box to be bound. It can be changed, and can effectively cope with bundling cardboard boxes of various sizes.
[0024]
In the bundling method having the above configuration (2), the paper band is adhered to the side surface of the box at the lower end portion of the upper box and the upper end portion of the lower box as compared with the bundling method of (1). Suitable for bundling relatively heavy cardboard boxes and cardboard boxes with high height.
  the above(3In the adhesive application nozzle having the configuration of (2), the adhesive jetting hole is provided while feeding a paper band between the backup roller and the jetting hole and applying a predetermined pressing force to the paper band on the peripheral surface of the roller. The hot melt adhesive is applied (applied) onto the flat surface of the paper band, so the hot melt adhesive is required on the paper band by adjusting the pressing force, paper band feed rate, and adhesive supply amount. The amount is ensured and can be applied easily. In addition, the adhesive can be applied intermittently by starting or stopping the supply of the adhesive to the application nozzle for the paper band that is fed out, and the application pattern of the adhesive to the paper band can be easily performed. It is possible to chooseThe paper band can be glued to the predetermined place of the boxTheIn this application nozzle, a backup roller is slidably accommodated and attached to the nozzle body in the direction of the adhesive outlet, and is screwed into the nozzle body and is in the direction of the outlet. A mandrel that is urged upward and has a tip protruding therefrom is slidably incorporated in the vertical direction, and the tip of the mandrel is in contact with the support shafts on both sides of the backup roller from below to support the backup roller. Since the presser is attached, by screwing or loosening the roller pressers on both sides, the distance between the opening of the jet outlet and the peripheral surface of the backup roller is adjusted and the adhesive is applied. The pressing force applied to the paper band by the backup roller is adjusted, and the pressure is adjusted so as to be evenly pressed by the backup roller over the width direction of the paper band. Furthermore, even if the paper band is wavy or distorted in the width direction, it is evenly habituated. As a result, the adhesive is uniformly applied to the paper band in the width direction, and the paper band is reliably adhered to a paper box such as a cardboard box.
[0025]
  the above(4In the adhesive application nozzle with the structure of), the adhesive can be reliably applied in the width direction of the paper band, and the injection hole has a round cross section of the opening, so that the processing is easy and the structure is simple. It can be manufactured at low cost.
[0026]
  the above(5In the adhesive application nozzle having the configuration of (2), since the cross section of the opening of the adhesive ejection hole is round, for example, the supply amount of the adhesive, the feeding speed of the paper band, and the pressing force of the paper band by the backup roller In the case of imbalance, etc., the hot melt adhesive supplied on the paper band from the opening of the ejection hole tends to spread to the surroundings. It is possible to effectively prevent the adhesive from flowing out into the nozzle body, for example, the back-up roller side, and adhering to both end faces in the width direction of the paper band due to the outflow. Further, the vertical wall of the protrusion preventing groove also functions as a paper band feed guide (guide portion).
[0027]
  the above(6In the adhesive application nozzle having the configuration of (2), the spray hole of the adhesive is formed in a slit shape in the direction along the width direction of the paper band, that is, in the shape of a long hole, and the opening of the spray hole Is formed at the apex of the protruding wall formed by projecting in a substantially inverted triangular shape from the wall surface of the coating nozzle body and rounded at the tip, and the paper band is sent close to or in contact with the apex portion. The adhesive is applied to the paper band in a thin film with a predetermined width, and at the beginning of the supply of the adhesive, the tip of the coating on the paper band is straightened in the width direction of the paper band. When the supply of the adhesive is stopped, the adhesive is easily cut on the paper band, and the rear end of the coated product is straightened in the width direction of the paper band. Accordingly, the adhesive is uniformly applied onto the paper band, and the paper band is reliably adhered to a paper box such as a cardboard box.
[0029]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
Each drawing shows an embodiment of the present invention, and FIG. 1 shows that corrugated cardboard boxes as paper boxes are stacked up and down in two stages, and the corrugated cardboard boxes and the paper band are bonded with a hot melt adhesive. Fig. 2 is a perspective view showing an embodiment of a bundle formed by bundling the cardboard boxes with a paper band, and Fig. 2 is a longitudinal section showing an embodiment of an adhesive application nozzle to a paper tape used in the bundling method of the present invention. FIG. 3, FIG. 3 is a right side view of FIG. 2, FIG. 4 is a diagram showing an adhesive application nozzle connected to an adhesive automatic discharge gun and attached to the paper band while continuously feeding the paper band through the inside of the application nozzle body. FIG. 5 is a perspective view showing a procedure for applying hot melt continuously or intermittently, FIG. 5 shows a different embodiment of the application nozzle, and an adhesive protrusion groove is formed on the opening wall surface of the adhesive injection hole. Fig.5 (a) is a partial longitudinal section FIG. 5 (b) is a cross-sectional view taken along line AA of FIG. 5 (a), and FIG. 6 shows a further embodiment of the coating nozzle, in which the cross-sectional shape of the adhesive ejection hole is formed in a slit shape. 6 (a) is a partial longitudinal cross-sectional view, FIG. 6 (b) is a cross-sectional view taken along line B-B in FIG. 6 (a), and FIG. 7 is a perspective view showing different bundling methods for cardboard boxes. .
[0030]
As shown in FIG. 1, a cardboard box bundle 1 as a paper box bundle is stacked with two or more corrugated cardboard boxes as a relatively light paper box containing a plurality of food items such as bag ramen. The upper cardboard box 1a (hereinafter referred to as the upper cardboard box 1a) and the lower cardboard box 1b (hereinafter referred to as the lower cardboard box 1b) are formed by being bound by the paper band 2 at a substantially central portion in the longitudinal direction. In the figure, S is a joint portion of the upper surface lid, H is a bonding portion between the corrugated cardboard box and the paper band 2 by the hot melt adhesive, and 2a is a handle portion along the upper surface of the upper box 1a of the paper band 2.
[0031]
The paper band 2 is attached along the upper surface of the upper box 1a and the side surfaces of the upper box 1a and the lower box 1b in a tensioned state, that is, in a tightly stretched state. Glued in the state. Further, its end is cut and positioned near the bottom of the side surface of the lower box 1b, and between the paper band 2 and the cardboard box, as shown by the oblique broken line in FIG. The upper end portion H and the lower end portion H of the paper band along the side surface of the lower box 1b are bonded with a hot melt adhesive.
[0032]
This reduces the looseness of the paper band 2 as much as possible when inserting the hand into the handle portion 2a and carrying it down, and effectively prevents the adhesive from being peeled off at the adhesive portion H on the side surface on the upper box 1a side. In addition, the lower box 1b also has a bonding portion H on the bottom side, so that the upper and lower boxes can be stably and tightly bound, and the weight of the bundle 1 is supported by its lower part, so that the load collapse of the bundle 1 is prevented. It can be effectively prevented. Further, by setting the bonding portion H to one portion on both side surfaces of each box, the bonding portion H can be reduced, and the number of man-hours for bonding and the amount of adhesive can be reduced. Since the paper band 2 is also cut at the side portions on both sides without being wrapped around the entire circumference, the amount of use can be reduced.
[0033]
A portion along the upper surface of the upper box 1a of the paper band 2 is a portion that inserts a hand from the direction indicated by G in the drawing to grip the paper band, and functions as a handle portion 2a when carrying the bundle 1. In this case, since the paper band 2 and the cardboard box have appropriate flexibility, hand insertion is allowed. Note that, depending on the size and weight of the cardboard box, the position and the number of bonding points and the bonding area are changed as appropriate.
[0034]
For example, as shown in FIG. 7, the bonding locations H in FIG. 1 may be two upper and lower portions on each side surface of the upper and lower boxes 1a and 1b. When such an adhesion method is employed, a distance L for ensuring that no adhesive is applied in the vertical direction from the joint is secured in order to prevent adhesion of the joint between the upper box 1a and the lower box 1b. In this case, it is suitable for a cardboard box having a relatively heavy weight or a cardboard box having a high height. Further, in the portion along the upper surface of the upper box 1a of the paper band 2, the central portion is made non-adhered and the portions on both ends in the width direction are adhered to each other so that the non-adhered portion of the central portion becomes the handle portion of the bundle 1 It may be 2a. In this case, it is suitable for a wide corrugated cardboard box, the elongation of the paper band handle 2a is reduced, and the bundle 1 can be stably carried. In this embodiment, as the cardboard box bundle 1 of the two-stage stacking of the upper and lower cardboard boxes 1a and 1b, one having a weight of 4 to 15 kg, preferably 4 to 10 kg is suitably used.
[0035]
Thus, by using the paper band 2 for bundling the corrugated cardboard boxes, it can be easily bonded to the cardboard box made of paper using a hot melt adhesive, and the paper band itself is lightweight and gripped. In both cases, it is suitable for human hands and is suitable as a material that can be used for binding, grasping and carrying cardboard boxes. And even when the cardboard box is unbound and the cardboard box and the band are discarded, there is no need to separate and dispose of the PP and the cardboard box separately as in the case of the conventional PP band. Separation and collection are not complicated, and even when discarded and recycled as waste, the cardboard box and the paper band can be disposed of together, and the number of separation and collection processes can be reduced. In addition, it can be disposed of as general trash and does not pollute the global environment. Moreover, even when folded and folded and disposed of like an elastic PP band, it is not bulky and leads to a reduction in dust.
[0036]
In this embodiment, the adhesive between the corrugated cardboard box and the paper band 2 is performed by applying a hot melt adhesive to the paper band 2 using the adhesive application nozzle 10 before attaching the cardboard box along the corrugated cardboard box in which the paper bands are stacked. This is done by applying. If the adhesive is applied to the paper band 2 in this way, even if the size of the corrugated cardboard box is changed, it is possible to cope with it by easily changing the location where the adhesive is applied to the paper tape. This is advantageous.
[0037]
Next, an embodiment of an adhesive application nozzle for the paper band 2 will be described with reference to FIGS. The coating nozzle 10 includes a nozzle body 11 in which an upper body 11a and a lower body 11b are integrally fastened by a bolt (not shown), and a backup roller 13 that is rotatably attached to a space 15 in the center of the nozzle body 11. The upper body 11a has a vertical adhesive supply passage 18 and an adhesive branch passage 19 branched from the passage 18 and extending horizontally on both sides and sealed at both ends by plugs 19a. Further, from the horizontal passage 19, an adhesive ejection hole (discharge port) 20 having a round cross-section in the opening portion that opens toward the space 15 at the substantially center of the passage 19 is provided on the roller 13. A plurality of (four in this embodiment) holes are formed in a range corresponding to the width and at substantially equal intervals in the direction along the width direction of the paper band 2.
[0038]
A space 15 between the inner wall surface 15b of the upper main body 11a where the ejection hole 20 opens and the upper end of the backup roller 13 is used as a paper band feeding space. The backup roller 13 is integrally formed with shafts 13 a having the same rotational axis as the rollers 13 on both sides, and the shafts 13 a on both sides are elongated holes formed on the thick walls on both sides of the nozzle body 11 and extending vertically. It is attached to the nozzle body 11 so as to be rotatable by being fitted and attached so as to be rotatable and slidable in the vertical direction. Further, below the shafts 13a on both sides, a roller presser 14 is screwed and attached to the lower main body 11b, and the center of the roller presser 14 is biased upward by a spring. Further, a mandrel 14a formed with a spherical surface with the tip projecting is slidably built up and down, and the tip spherical surface of the mandrel 14a is in contact with the shaft 13a from below.
[0039]
By screwing or loosening the left and right roller pressers 14, the vertical spacing of the paper band feeding space is adjusted, and the pressing force of the paper band 2 during adhesive application is adjusted. Further, the roller 13 is adjusted so as to press evenly over the width direction of the paper band 2. Furthermore, even if the paper band 2 is wavy or distorted in the width direction, the paper band 2 is evenly habituated, and the adhesive is evenly applied in the width direction. In FIG. 1 and FIG. 2, the paper band 2 is shown with a large thickness for ease of explanation, but it is actually smaller. In addition, a gap is formed between the opening wall surface 15b of the ejection hole 20 and the upper surface of the paper band 2, but in actuality, the gap is zero (0) at the time of application, and the opening of the ejection hole 20 and the paper band 2 The top surface is in contact.
[0040]
On the other hand, a retaining nut 16 is attached to a protruding portion at the upper center of the upper body 11a via a retainer pin 17 wound around the upper body 11a. It is used by being connected to the module M part of the discharge gun 40. With this connection, the vertical adhesive supply passage 18 of the upper main body 11 a of the application nozzle 10 is communicated with the adhesive ejection hole 44 formed in the module M of the automatic discharge gun 40. In the module M of FIG. 2, 41 is a valve rod having a spherical portion (ball) 41a at the tip, 42 is an adhesive passage, 43 is a valve seat, and 43a is a seat surface.
[0041]
As described above, in the present embodiment, the application nozzle 10 is connected to the automatic discharge gun 40 and used. More specifically, as shown in FIG. 4, the automatic discharge gun 40 includes a module M, a service block SB connected to the module M, and a mounting block connected to the upper end of the service block SB. A heating hose that is configured of MB and that supplies hot melt adhesive to the discharge gun 40 between the service block SB and an applicator main body having a hot melt adhesive tank and a feed pump (not shown). One end of HH is connected.
[0042]
Although not shown, the module M has a built-in air piston, and the piston is connected to the valve rod 41 that moves up and down integrally with the piston. Also, the valve rod 41 is separately provided with a compression spring built in, so that the ball 41a at the tip always abuts against the seat surface 43a of the valve seat 43 to prevent the hot melt adhesive that is always accumulated in the passage 42 from being ejected. Yes. When the adhesive is ejected, the ball 41a of the valve stem is separated from the seat surface 43a by supplying compressed air by turning on an electromagnetic valve separately installed on the air piston. In addition, the service block SB is provided with a compressed air supply passage connected to the air piston, a hot melt adhesive passage connected to the adhesive passage 42, a heater, and a temperature sensor. The mounting block MB fixes the automatic discharge gun 40 to a mounting jig.
[0043]
A method of applying a hot melt adhesive to the paper band 2 using the adhesive application nozzle 10 configured as described above will be described. The paper band 2 is drawn out of a roll having a leading end wound by a drawing device (not shown), while the inner wall surface 15b of the upper body 11a of the nozzle body 11 where the ejection holes 20 are opened and the upper end of the backup roller 13 The paper band feeding space in between is sent. When the paper band 2 is fed, the paper band 2 is applied with a predetermined pressing force to the opening wall surface 15b of the ejection hole 20 through the backup roller 13 and evenly in the width direction of the paper band 2. The screwing amount of the roller pressers 14 on both the left and right sides is adjusted so as to be in contact with each other.
[0044]
Then, the size of the cardboard box to be bound and the adhesive to the paper band 2 as shown in FIG. 1, FIG. 4 or FIG. An adhesive is applied to the paper band 2 based on the application pattern. That is, when it is time to apply the adhesive to the paper band 2, compressed air is supplied to the air piston of the module M of the automatic discharge gun 40, and its valve (ball) 41a is opened for a predetermined time according to the required application amount. Then, the hot melt adhesive is supplied and applied onto the paper band 2 from the plurality of round holes 20 having a round hole shape.
[0045]
The adhesive supplied onto the paper band 2 from each of the ejection holes is fed while contacting the wall surface 15b where the ejection holes are opened with the moderate pressure that the paper band 2 is adjusted. It diffuses in the width direction of the paper band 2 from the opening of each ejection hole 20 on the coating surface, and is applied to the paper band 2 with a necessary width. Further, the feeding direction of the paper band 2 of the adhesive, that is, the pattern such as the coating width in the longitudinal direction and the coating interval is easily changed and adjusted by controlling the opening / closing time of the valve (ball) 41a of the module M. be able to. That is, the adhesive is discharged and applied from the ejection hole 20 of the application nozzle 10 while the valve 41a is open, and the application can be completed by closing the valve 41a. Thus, the adhesive can be applied to the paper band 2 in an arbitrary pattern by connecting the application nozzle 10 to the module M that can start and stop the supply of the adhesive.
[0046]
Thus, the paper band 2 on which the hot melt adhesive is applied in a predetermined application pattern on one surface is not shown, a device for attaching the paper band around the cardboard box, a paper band tensioning device, a paper band To the corrugated cardboard box and an automatic binding device equipped with a paper band cutting device or a manual binding device, and the paper band 2 is tensioned by the tension device, that is, tightly stretched. In this state, the attachment device is attached along the upper surface of the upper box 1a and the side surfaces on both sides of the upper and lower boxes 1a, 1b. By pressure bonding, the adhesive is solidified, and the paper band 2 is bonded to the upper and lower corrugated boxes 1a and 1b, and the cardboard box bundle 1 is obtained.
[0047]
Next, different embodiments of the application nozzle will be described with reference to FIG.
In this embodiment, as shown in FIGS. 5 (a) and 5 (b), the adhesive ejection hole 20 has the same opening cross section as the embodiment of the application nozzle shown in FIG. A plurality of (four in the present embodiment) are provided at substantially equal intervals in the direction along the width direction of the paper band 2, and an adhesive protrusion prevention groove 15c is formed on the opening wall surface of the adhesive ejection hole 20. It is. The protrusion preventing groove 15c is formed so that the width of the groove is substantially equal to the width of the paper band 2, and the depth is about half the thickness of the paper band 2, for example, 0 when the thickness of the paper band 2 is 1 mm. About 5 mm.
[0048]
Thus, when the cross section of the opening of the adhesive ejection hole 20 has a round hole shape, for example, adjustment of the adhesive supply amount, the feeding speed of the paper band 2, and the pressing force of the paper band 2 by the backup roller 13 are adjusted. When the balance is unsatisfactory, etc., the hot melt adhesive supplied on the paper band from the opening of the ejection hole tends to spread to the periphery and easily flow out. However, as in this embodiment, the protrusion prevention groove 15c is provided. In this case, the adhesive flows out into the nozzle body 11 at the vertical wall portion of the protrusion prevention groove 15c, for example, flows out to the backup roller 13 side, and adheres to both end surfaces in the width direction of the paper band 2 due to the outflow. Etc. can be effectively prevented. The protrusion preventing groove 15c can also act as a feed guide (guide portion) for the paper band 2 on the vertical wall, so that the paper band 2 can be fed stably.
[0049]
FIG. 6 shows a further different embodiment of the application nozzle. In this embodiment, as shown in FIGS. 6 (a) and 6 (b), the adhesive ejection holes 20 a are formed in a slit shape (also referred to as a slot shape) in a direction in which at least the cross section of the opening is along the width direction of the paper band 2. In other words, the projecting wall is formed in a long hole shape, and the opening of the ejection hole projects from the wall surface of the coating nozzle body 11 in a substantially inverted triangular shape and is rounded at the tip. The so-called coating head (slot nozzle) type is formed so as to be formed at the apex of 15d, and the paper band 2 is fed in contact with the rounded apex portion.
[0050]
With such a configuration, the hot melt adhesive is surely applied in a thin film shape with a predetermined width on the paper band 2, and the coated material on the paper band 2 at the start of supply of the adhesive It starts with the leading edge straight in the width direction of the paper band 2, and the cutting performance of the adhesive on the paper band is good even when the supply of the adhesive is stopped. It can be in a straightened state. Therefore, it is possible to uniformly apply the adhesive onto the paper band 2, and it is possible to reliably adhere the paper band 2 to the cardboard box.
[0051]
In the above embodiment, the case where the cardboard boxes are stacked in two stages has been described. This is because, for example, when the cardboard boxes are relatively small in size and low in height, the cardboard boxes are stacked by stacking three or more levels. The present invention can also be applied to a body. In addition, although the attachment portion of the paper band 2 is an intermediate portion in the longitudinal direction of the cardboard box, in the case of a cardboard box having a long length, the paper band 2 may be applied to a plurality of places. Furthermore, the application of the adhesive to the paper band 2 is not intermittent in the longitudinal direction of the paper band 2 as shown in FIG. 1, FIG. 4, or FIG. You may apply | coat in the range over the whole surface (total height) of the side surface, leaving the space | interval L. In this case, the adhesive strength with the box can be increased.
[0052]
Although the case where the paper box is a cardboard box has been described in the above embodiment, the present invention may be a cardboard box or other paper box. In addition, the contents in the cardboard box have been shown for foods such as bag ramen. There may be.
[0053]
【The invention's effect】
As is clear from the above description, according to the present invention, a paper band is used as a binding means, and a hot melt adhesive is used between a paper box such as a corrugated cardboard box and the paper band stacked in the vertical direction. By bonding, the paper band and the paper box can be easily and reliably bound. Then, the bundle can be easily carried by holding the handle part by hand, which can contribute to the simplification of physical distribution. Also, since the paper band is relatively flexible, soft and soft even when it is carried, it is easy to become familiar with the hand and is suitable.
[0054]
Moreover, if the paper band is cut and bound with the vicinity of the bottom of the side surface of the lowermost box as an end, the amount of paper band used can be reduced and resource saving can be achieved.
Moreover, if the hot melt adhesive is applied to the paper band side using an application nozzle to bond the box and the paper band, the adhesive can be applied to the paper band in a desired free pattern. At the same time, the location where the adhesive is applied to the paper band can be easily changed according to the size of the box to be bound, so that the work efficiency can be improved.
[0055]
Furthermore, even when the paper box is unbound and the paper box and the band are discarded, there is no need to separate and dispose of the PP and the paper box as in the case of the conventional PP band. , Separation and collection as waste is not complicated, and even when discarded or recycled as waste and reused, paper boxes and paper bands can be disposed of together, reducing the number of separation and collection man-hours. it can. Moreover, it can be disposed of as general waste and does not pollute the global environment. Even when it is discarded, it does not become bulky when folded like a PP band, but it can be easily folded and discarded to reduce waste.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a bundle formed by stacking cardboard boxes of the present invention vertically in two stages and bonding the cardboard boxes with a paper band by bonding them with a hot melt adhesive. It is a perspective view which shows one Embodiment.
FIG. 2 is a longitudinal sectional view showing an embodiment of an adhesive application nozzle for paper tape used in the bundling method of the present invention.
FIG. 3 is a right side view of FIG. 2;
FIG. 4 shows that the adhesive application nozzle of the present invention is connected to and attached to an adhesive automatic discharge gun, and hot melt is continuously or intermittently applied on the paper band while continuously feeding the paper band through the inside of the application nozzle. It is a perspective view which shows the point to apply | coat.
FIG. 5 shows a different embodiment of the coating nozzle of the present invention, in which an adhesive protrusion groove is formed on the opening wall surface of the adhesive ejection hole. FIG. 5 (a) is a partial longitudinal sectional view, FIG. FIG. 5B is a cross-sectional view taken along line AA in FIG.
6 shows still another embodiment of the coating nozzle of the present invention, in which the cross-sectional shape of the adhesive injection hole is formed in a slit shape, FIG. 6 (a) is a partial vertical cross-sectional view, and FIG. 6 (b). FIG. 7 is a cross-sectional view taken along line B-B in FIG.
FIG. 7 is a perspective view showing a different method for binding cardboard boxes according to the present invention.
[Explanation of symbols]
1 Cardboard box (paper box) bundle
1a Upper box
1b Lower box
2 Paper band
2a Handle part (paper band)
H Hot melt bonding point
L No adhesive application range
10 Adhesive application nozzle
11 Nozzle body
11a Upper body
11b Lower body
13 Backup roller
14 Roller presser
15 Roller storage space
15b Outlet hole wall
15c Overflow prevention wall
15d protruding wall
18 Adhesive supply passage
19 Adhesive branch passage
20, 20a Adhesive outlet
40 Automatic dispensing gun
41 Valve stem
41a ball
42 Adhesive passage
43 Valve seat
M module
SB service block
MB mounting block
HH heating hose

Claims (6)

A method of stacking at least two relatively lightweight paper boxes containing food or the like on top and bottom and binding them integrally with a band, wherein the stacked boxes have a weight of 4 to 15 kg, In a tensioned state, a band is attached along the upper surface and both side surfaces of the uppermost box of the overlapped box, and the side surfaces of the overlapped box and the paper band in between, the upper end portion and the side surface of the bottom of the box side of the top of the box and the bottom portion was bonded by hot melt adhesive, the portion along the upper surface of the uppermost box with superposition of the paper band At least a part is a non-adhesive part and a handle part of the box in which the non-adhesive part is overlapped. The adhesive between the box and the paper band is performed by applying a hot melt adhesive to the paper band with an adhesive application nozzle. Box in which the adhesive application surfaces of Tying methods paper box, characterized by bundling the paper box by crimping in a state of facing to each side of both sides. A method of stacking at least two relatively lightweight paper boxes containing food or the like on top and bottom and binding them integrally with a band, wherein the stacked boxes have a weight of 4 to 15 kg, In a tensioned state, a band is attached along the upper surface and both side surfaces of the uppermost box of the overlapped box, and the side surfaces of the overlapped box and the paper band during the, to bond the upper end and the lower end portion of the upper end portion and lower end portion and side surface of the bottom of the box side of the top of the box with a hot melt adhesive, the uppermost box with superposition of paper bands between At least part of the portion along the upper surface of the paper is a non-adhesive part, and a handle part of the box in which the non-adhesive part is overlapped. A hot melt adhesive is applied to the paper band by an adhesive application nozzle. Apply and glue the paper band Tying methods paper box, characterized by bundling the paper box by crimping the fabric surface when directed to each side of both sides of the box superimposed said. The adhesive supply passage and one plane of the branched paper band from the supply passage has a nozzle body with the ejection hole for supplying the hot melt adhesive application, in the nozzle body,該噴outlet inside its A backup roller that is housed and mounted so as to be rotatable directly under the nozzle and slidable in the direction of the jet outlet, and sends out the paper band while pressing the paper band at a predetermined pressure between the opening of the jet hole and its peripheral surface, and a nozzle A mandrel that is screwed into the main body and is urged upward in the direction of the jet outlet and protruded at the tip is incorporated so as to be slidable up and down, and the tip of the mandrel is supported on both side support shafts of the backup roller. to be contact from below respectively be attached to the roller suppressed for by adjusting the distance between the opening and the backup roller peripheral surface of該噴outlet supports the backup roller to adjust the pressing force to the paper band , Paper band Coating nozzle of the adhesive to the paper band, characterized in that pressing force in the width direction uniformly paper band via the backup roller in the opening of the ejection hole is configured to be contacted is granted. The adhesive ejection holes are formed in a plurality of nozzle bodies at predetermined intervals in a direction along a width direction of the paper band, with a cross section of the opening formed in a round hole shape. 3 Nozzle for applying adhesive to paper band. Wherein the nozzle body further into the wall surface of the opening of the ejection hole, claim 4 in contact with or in proximity to the widthwise ends of the paper band, characterized in that the formation of the anti-extrusion grooves of adhesive having a vertical wall Application nozzle for adhesive on paper band. The adhesive injection hole is formed in a slit shape in which the cross-section of the opening is in a direction along the width direction of the paper band, and the opening of the injection hole protrudes from the wall surface of the coating nozzle main body into a substantially inverted triangular shape. 4. The adhesive to a paper band according to claim 3 , wherein the paper band is formed at the apex of a protruding wall formed by being rounded, and the paper band is fed close to or in contact with the apex portion. Application nozzle.

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