JP2008273142A - Paste coating method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a pasted-up part continuous in the direction crossing the feed direction of a blank at a right angle by coating the blank with paste in the direction crossing the feed direction of the blank at a right angle by a gun while putting the advantage in a gun discharging method to practical use. <P>SOLUTION: The interval between the positions of a plurality of guns 2 is set to the overlapped interval of paste mutual stretching ranges 6 wherein the paste coating point positions in the lateral paste coating scheduled parts 3 in the blank are adjacent to each other to set the coating timing of the lateral paste coating scheduled part of the fed blank with the paste. The paste 5 is discharged in a discharge amount of an amount wherein the stretching ranges are partially overlapped with each other from the respective guns 2 to discontinuously apply the paste 5 along the lateral paste coating scheduled part 3. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a paste application method for a carton blank.

Conventionally, when a blank is assembled and a carton is boxed, the overlapping and connecting portions are bonded together using an adhesive. For example, in the pasting of the body part (sack pasting), the blanks are sequentially sent to the conveyance path of the box making line and folded so that the corresponding part of the glue margin and the glue margin are opposed to each other via the glue. Is doing.
In general, when the glue is supplied to the glue margin, for example, as shown in Patent Document 1, the glue is applied to the glue margin of each blank in the middle of the conveyance path. In addition, as shown in Patent Document 2 or the like, a wheel is used when applying glue in a linear shape to the adhesive margin, or as shown in Patent Document 3, the glue is discharged from the nozzle at the tip. Many guns that apply linearly are also used. After the body has been formed in this way, a block-like carton can be created by folding and stacking the flaps that are connected to the upper and lower ends of each plate material of the body and bonding them together as necessary. Is obtained.

  Also, a sleeve manufacturing process for making a flat sleeve with the sack applied without continuously assembling from the blank to the final carton form, and setting the sleeve in a filling device to form the bottom of the carton, There are also many methods of filling the contents and dividing it into a filling step in which the upper flap is folded and pasted to close the upper part.

  By the way, as one form of the carton to be boxed, there is one in which the upper part is opened to obtain a wide opening. For example, a carton or the like of a product box containing a powder detergent, and a carton having a block shape with an open upper surface is often used. A container using such a carton is covered with a separate lid. In the carton itself, in order to increase the rigidity of the opening peripheral edge, a reinforcing flap is connected to the upper edge of the plate material on the four sides of the trunk, and each of the reinforcing flaps is folded to the inner surface (inner side of the container) of each plate material. Paste.

FIG. 6 shows a blank having a device for increasing the strength of the opening edge of the carton as described above.
The blank a has a side plate c connected to both sides of the front plate b as a part forming the trunk of the carton, a back plate d connected to one side plate c, and one side of the back plate d. As shown in the drawing, a side piece c, a front plate b, a side plate c, a back plate d, and a glue piece e are connected in order from one side through a folding line f as shown in the figure. . Further, bottom forming flaps g for forming the bottom of the carton are connected to the lower side of each face plate for forming the body part via a crease f. And the reinforcement flap h which raises the intensity | strength of an opening periphery is connected as an overlapping face board via the folding ruled line f on the upper side of each face board of the trunk | drum four directions.

  When the blank a is folded to create a flat sleeve, the reinforcing flap h is bonded to the face plates c, b, c, d of the trunk. In order to perform the bonding, the front plate b and the reinforcing flap h connected to the front plate b are straddled across both opposing surfaces, and the side plate c and the reinforcing flap h connected to the side plate c are connected. The paste i is applied so as to straddle both opposing surfaces of the back plate d and the reinforcing flap h connected to the back plate d. After the glue is supplied, the reinforcing flap h is folded down from the folding line f to the inner surface side of each of the face plates c, b, c, d.

(Gun discharge method)
As described above, there is a gun discharge method as a method of applying glue to a necessary portion such as a facing surface that faces each other when they are overlapped with a blank a, and particularly as a glue application adapted to a system that continuously creates many sleeves. .
The gun used in this gun discharge method is a device that pressurizes and sends glue to a nozzle with a small hole, and can instantaneously switch between discharge and discharge stop while controlling the opening and closing of the supply passage on the nozzle side. It is possible to apply glue in a linear manner by continuously discharging toward a blank moving at a constant speed, and to stop discharging glue until the blank passes and the next blank corresponds.

When applying glue to the blank by the gun discharge method, first, as shown in FIG. 7 in the conveyance path of the blank a, as shown in FIG. A glue supply mechanism k is provided on the downstream side in the delivery direction. This glue supply mechanism k is provided with a plurality of guns l for discharging glue from nozzles arranged at the lower end in the width direction of the conveyance path, and supplies a blank a which is sequentially fed at a constant speed. Detected by an optical sensor or the like installed on the upstream side of the mechanism k, the glue supply mechanism k operates at a timing when the detected blank a is positioned under the glue supply mechanism k, and is located under each gun l. When both opposing surfaces of the reinforcing flap and the face plate connected to the reinforcing flap (face plate on the four sides of the carton barrel) pass through, the paste is continuously discharged from the gun l into the opposite face region, and is short in the flap feed direction. It is controlled so that the adhesive m is applied in the form of a line in length (although a single gun is shown in FIG. 7, a plurality are arranged in the depth direction of the drawing). As described above, until the predetermined portion of the blank passes, the gun itself is in a continuous discharge state of the glue (as a result, the paste is applied in a linear shape in the blank) until the next predetermined portion is in a corresponding position. During this period, the discharge is stopped and a non-discharge state is entered. That is, the gun discharges glue toward a predetermined portion of each blank that is sequentially conveyed, and the gun operates alternately between a continuous discharge state and a continuous non-discharge state. ing.
After the blank to which the paste has been discharged and fed is sent out from the position of the paste supply mechanism, the reinforcing flap h is folded and pressure is applied in a state where the folded portion is sandwiched between pressure rollers or the like. The reinforcement flap h is affixed on the inner surface side of the faceplate of a trunk | drum by this.

As one form of the carton, there is one having a structure in which a part of the lid member is detachably locked to the front plate side, and as shown in FIG. In order to provide a portion where the material is releasably locked, a through hole n is opened in the front plate b, and the through hole n is closed from the inside of the carton with a reinforcing flap h to be folded. A recess for locking facing toward the side is formed.
In this way, when providing a portion for opening the through hole in the front plate and locking the lid material, the powder detergent of the contained material enters the gap between the reinforcing flap and the front plate and leaks from the through hole at the time of distribution of goods. It is necessary to prevent problems from occurring.
In order to prevent leakage from the through-hole, it is effective to surround the position of the through-hole at the bonding position between the reinforcing flap and the front plate. However, since the glue supply by the above-described gun ejection method only applies the glue in a line along the blank conveyance direction, the glue is supplied by the following pattern transfer method.

(Pattern transfer method)
When supplying the paste by the pattern transfer method, first, as shown in FIG. 9, a feed chain p having positioning claws o is provided at a constant interval on the conveyance path of the blank a, and the feed interval of the blank a is set by this feed chain p. Are transported accurately. A glue supply mechanism q is provided on the delivery side of the feed chain p.
In the pattern transfer method, the glue supply mechanism q transfers glue from a glue pad (not shown) to a glue drum s on which a glue plate r is arranged at a constant interval in the circumferential direction of the drum. The glue plate r presses the blank a sent out below, and the glue is transferred from the glue plate r to the same position of the blank a in a state where the transport movement of the blank a and the rotation of the glue drum s are synchronized. Yes. In this case, the feeding interval of the blank a corresponds to the interval of the paste plates r arranged in the circumferential direction.

The transfer pattern of the glue plate r for supplying glue to the front plate b and the reinforcing flap h connected to the front plate b has a substantially frame shape, and the positions of the through holes n are as shown in FIG. The paste m is transferred and applied so as to straddle the opposing surface of the reinforcing flap h and the corresponding front plate b with the reinforcing flap h. The other side plate c and the reinforcing flap h connected to the side plate c are transferred with paste m in a planar pattern so as to straddle both opposing surfaces, and the back plate d and the reinforcing flap connected to the same are also provided. The paste m is transferred in a planar pattern so as to straddle both opposing surfaces.
After the blank with the adhesive transferred and applied in this way is fed out from the glue supply mechanism, the reinforcing flap h is folded, and the pressure is applied with the folded portion sandwiched between pressure rollers. By adding, the reinforcement flap h is affixed on the inner surface side of the face plate formed with the body portion. As a result, the pasted part of the front plate and the reinforcing flap via the glue is located continuously in three directions from the position of the through hole, and the remaining one is a crease, so the reinforcement folded inside the carton Even if the powder detergent of the contained material enters the gap between the reinforcing flap and the front plate from the three sides of the flap, the powder detergent does not reach the through hole by being blocked by the bonded portion, Leakage of powder detergent from is prevented.

(Pattern transfer method + gun discharge method)
In the paste supply by the pattern transfer method, the paste is transferred as a frame-like or plane-like pattern from the paste plate of the glue drum to the opposing surface of the reinforcing flap h and the face plate of the body part to which the reinforcing flap h is connected. Although applied, the other facing surface portions except for the facing surface portion between the front plate in which the through holes are arranged and the reinforcing flap connected to the front plate are supplied by the above-described gun discharge method. It is also possible.
In this case, the glue supply mechanism k formed by arranging a plurality of guns separately from the glue supply mechanism q consisting of the glue drum is arranged on the blank conveyance path, and the front plate on which the through holes are arranged and the front plate are connected to this. Glue is supplied by pattern transfer by the glue supply mechanism of the glue drum on both opposing surfaces of the reinforcing flap that is being used, and the blank a is placed below this by the glue supply mechanism k of the gun discharge method for the other opposing surface portions. Glue is discharged and supplied in a linear shape when it corresponds.

As a result, as shown in FIG. 11, in the blank a, the paste m is pattern-transferred in a frame shape on both opposing surfaces of the front plate b and the reinforcing flap h connected to the front plate b, and the glue supply mechanism in the gun discharge method k so as to straddle both opposing surfaces of the side plate c and the reinforcing flap h connected to the side plate c, and to straddle both opposing surfaces of the back plate d and the reinforcing flap h connected thereto. The paste i is applied to the surface.
After that, the reinforcing flap h is folded on the blank a, and the reinforcing flap h is attached to the inner surface side of the face plate formed by applying pressure in a state where the folded portion is sandwiched by a pressure roller or the like. Attached.

In the adhesive supply by the pattern transfer method + gun discharge method, the blank is transported and moved with a constant interval by the feed chain, but the blanks are sequentially one sheet by the belt described above without using the feed chain. It is also possible to send them out one by one. In this case, the position of the fed blank is detected by an optical sensor, and the glue pattern is transferred by controlling the rotation of the glue drum for each blank while adjusting the timing based on the position information. The paste is supplied for each blank.
JP 2006-334924 A JP 58-078741 A Japanese Patent Laid-Open No. 10-128886

(Problems with glue pattern transfer)
Glue supply mechanism using a glue drum Glue supply method with glue, that is, the above-mentioned pattern transfer method, and the above-mentioned method that combines the pattern transfer method and the gun discharge method, Thus, the paste is supplied in a pattern that surrounds the positions of the through holes of the front plate, and the paste can be supplied to the blank according to a specific shape.
However, this method of supplying glue to the blank by pattern transfer of glue has a problem that the amount of glue consumed increases. In addition, as shown in FIG. 12, as the pattern transfer is repeated, a glue pool t is gradually generated at the edge portion of the glue plate r of the glue drum s that transfers the glue to the blank. Therefore, in order to transfer the paste in an appropriate pattern, maintenance is required to periodically stop the sleeve production line and clean the paste drum paste plate.
Furthermore, during the period from the end of the sleeve manufacturing operation to the start of the operation again, for example, when the sleeve manufacturing line is stopped during the night, the glue paste is removed from the glue supply mechanism when the operation is stopped. It is necessary to clean itself and prevent the glue from sticking with glue paste. When the line is restarted, clean glue is set and the glue is filled with new glue. As described above, when the work for manufacturing the sleeve is completed, there is a trouble of cleaning the paste.

In the case of the above-described method in which the glue drum is rotated at a constant speed, the blank is conveyed at a constant interval under the condition that the timing is synchronized with the rotation of the glue drum. Since the blank cannot be transported and the blank is delivered by using a feed chain provided with positioning claws, the blank feeding interval cannot be reduced, and thus the production efficiency does not increase. .
It is conceivable to increase the rotational speed of the glue drum in response to this problem, but if this is done, the centrifugal force applied to the glue on the glue plate will increase and glue jump will easily occur, and the inside of the sleeve will adhere. There is a problem in that internal glue defects such as the sleeve not being opened when the contents are filled, and the quality of the sleeve is deteriorated due to dirt adhered to the blank. And it is possible to reduce the blank feeding interval by the above-mentioned belt without using the feeding chain, but if the blank feeding interval is reduced by belt conveyance, the rotational speed of the glue drum will be increased, and the same As a result, glue splash is likely to occur.

(Problem with gun discharge method)
Compared with the paste pattern transfer method, when the paste is supplied to the blank by the gun discharge method, the paste applied to the necessary portion of the blank is linear, and the amount of glue consumed is small. Further, when a blank is transported in one direction on a transport path, if a transport system using a belt is employed without using a transport chain, the transport interval can be reduced.
Then, the position of the moving blank is detected by an optical sensor, and the operation of the glue supply mechanism is set so that discharge is supplied when the blank corresponds to the bottom of the gun while being based on the position. Even if it is made smaller, it becomes possible to supply glue to each blank. Further, the maintenance is easy without causing the above-mentioned problem of glue accumulation. In addition to this, since the change from the paste supply tank to the gun nozzle is closed without being opened to the outside, the change of the paste can be prevented, so that the management of the paste itself becomes easy.

  However, as described above, the gun discharge method applies the glue in a line along the blank conveyance direction with respect to the blank, and thus is perpendicular to the conveyance direction for the moving blank. There is a problem that it is not possible to apply glue by making the shape linear in the direction, and therefore, it is not possible to provide a bonded portion continuous with the blank in a direction orthogonal to the transport direction.

  Therefore, in view of the above circumstances, the present invention applies paste in a direction orthogonal to the blank transport direction by using a gun while taking advantage of the gun discharge method, and performs continuous pasting along the direction orthogonal to the blank transport direction. The purpose is to obtain a carton that covers the through hole in the blank by bonding a reinforcing flap and prevents leakage of the contents from the through hole. is there.

  The present invention has been made in view of the above problems, and a carton blank having a face plate and a laminated face plate connected to the face plate so as to be foldable via a crease is sequentially conveyed and conveyed in one direction. A paste applying method for applying glue for folding and bonding the face plate and the overlapping face plate to the opposing surfaces facing each other when the face plate of the blank and the overlapping face plate are folded, A part of the opposing surface of the blank is provided with a horizontal glue application scheduled portion along a direction orthogonal to the blank conveyance direction, and intermittent discharge of glue toward the conveyance path side on the conveyance path where the blank is conveyed A plurality of guns are provided to discharge and apply glue to each of the horizontal glue application scheduled portions of the blank that is transported and the paste is discharged from the gun to the horizontal glue application scheduled portion. Amount, horizontal glue coating Position in the direction perpendicular to the transfer direction of the gun, with the amount of glue applied to the planned portion extending within the range of the horizontal paste application planned portion between the face plates when the face plate and the overlapping face plate are folded over In the horizontal glue application scheduled part, the glue application point position is the interval where the extension ranges of adjacent glues overlap, and multiple guns are placed, and glue is applied to the horizontal glue application scheduled part of the conveyed blank A paste application method characterized in that the paste is discharged from each of the guns at a timing to apply the paste in a discontinuous manner along the side adhesive application scheduled portion. It is provided to solve the above problems.

  And in the said invention, the position in the conveyance direction of the gun blank where the glue application point is adjacent to the position where the adhesive application point is adjacent is shifted forward and backward, and the glue where the adhesive application point is adjacent in the horizontal adhesive application scheduled part. It is possible to apply by discharging from the gun whose position in the conveyance direction of the blank is back and forth.

  Further, in the above invention, the crease between the face plate and the overlapping face plate is along a direction orthogonal to the conveyance direction of the blank, and the side glue application planned portion is parallel to the crease, The blank has a vertical glue application scheduled portion extending from each end of the horizontal glue application scheduled portion to the crease, and the vertical glue application scheduled portion is aligned in the conveyance direction of the blank. It is possible to apply glue forming a continuous bonded portion along the flank conveying direction to the horizontal glue application scheduled part from the two guns on the end side of the planned cloth part.

  According to the invention of claim 1, since the paste is applied to the carton by the gun for discharging the paste, the blank is detected by the optical sensor as in the prior art on the upstream side of the portion to which the paste is applied in the blank conveying process. Then, based on the detected information, it is possible to employ a method of controlling the operation of the gun so that the paste is applied when the blank corresponds to the location where the paste is discharged. Therefore, it is possible to adopt a transport method using a transport belt without being limited to a transport method for transporting a blank by a feed chain, and even if it is necessary to switch the blank transport timing in the sleeve creation work, the switching work is not necessary. It becomes simple and the efficiency of the operation | work which produces a sleeve from a blank can be improved.

  According to the invention of claim 2, since the gun is arranged by shifting the position of the blank in the conveyance direction back and forth, it is not necessary to consider the mutual interference of the guns at the arrangement position, and each of the guns is an ultra-compact type. An inexpensive popular type device can be adopted without using the device.

  According to the invention of claim 3, paste is applied to the horizontal glue application scheduled part and the vertical glue application scheduled part continuous to the end of the horizontal glue application scheduled part on the opposing surface of the blank face plate and the overlapping face plate. When the face plate and the overlapping face plate are overlapped, a continuous bonded portion can be formed in the horizontal glue application scheduled portion and the vertical glue application scheduled portion, and thus the paste is applied to the blank having a through-hole on the opposite surface as described above. Even if it is clothed, it becomes possible to obtain a carton that prevents leakage of the contents from the through holes.

Next, the present invention will be described in detail based on the embodiment shown in FIGS.
In the figure, reference numeral 1 denotes an adhesive supply device used in the method of the present invention, which is arranged above a conveyance path (not shown) through which a blank a is conveyed. The glue supply device 1 is a combination of 12 guns 2 capable of intermittently discharging fluid liquid glue, and the plurality of guns 2 are orthogonal to the conveyance direction X of the blank a. They are arranged across the width direction of the transport path in the direction Y.
And as for the blank a which receives supply of glue from this glue supply device 1, as mentioned above, the reinforcement flap h is connected with the upper side of the front board b, the side board c, and the back board e via the folding rule f, The reinforcing flap h is folded on the front plate b, the side plate c, and the back plate d, and the portion that becomes the opposing surface when the front plate b and the reinforcing flap h connected to the front plate b are folded. Among them, a through-hole n is opened at the center of the facing surface of the front plate b.
Further, on the opposite surface of the front plate b, a side glue application scheduled portion 3 is provided at a position opposite to the folding line f with the through hole n in between, and this side glue application scheduled portion 3 is a blank. A direction along the direction Y orthogonal to the conveyance direction X of a is a longitudinal direction. And the crease f between the front board b and the said reinforcement flap h is the direction along the said direction Y similarly, and the crease | fold crease f and the said horizontal glue application plan part 3 are parallel.
Further, the vertical glue application scheduled portion along the direction perpendicular to the longitudinal direction of the horizontal glue application scheduled portion 3, that is, along the conveying direction X, between both ends of the horizontal glue application scheduled portion 3 and the crease f. 4 is provided, and the position of the through hole n is surrounded by one horizontal glue application scheduled portion 3, two vertical glue application scheduled portions 4, and the crease line f. As will be described later, by applying glue in the present invention, when the reinforcing flap h is folded on the facing surface portion of the front plate b, the paste between the reinforcing flap h and the front plate b is interposed. The bonded portion is continuous between the reinforcing flap h and the front plate b at the position of the horizontal glue application planned portion 3 (continuous in the Y direction) and is continuous at the position of the vertical glue application planned portion 4 (X As a result, the position of the through hole n is surrounded by the three-side bonded portion and the crease line f, so that the powder detergent or the like accommodated in the carton form can be connected to the reinforcing flap from the inner side of the carton. A carton that prevents the through hole n from reaching the face plate even if it enters the face plate is obtained.

In the present invention, the paste is discharged from each gun 2 of the glue supply device 1 and applied to the horizontal glue application scheduled part 3 and the vertical glue application scheduled part 4 of the blank a conveyed in the conveyance direction X. To do.
Under the gun 2 at both ends in the Y direction of the glue supply device 1, the range from the front end to the rear end of the vertical glue application scheduled portion 4 is moved, and under the remaining 10 guns. The horizontal glue application scheduled portion 3 is moved.
First, the blank a is detected by an optical sensor on the upstream side in the conveyance direction X of the glue supply device 1, and the blank a is conveyed at a constant speed toward the lower side of the glue supply device 1 based on the detection information. The operation of each gun 2 is controlled by a control unit (not shown) according to the vertical glue application scheduled part 4 and the horizontal glue application scheduled part 3, and the tip of the vertical glue application scheduled part 4 moves below the gun. When it comes, the guns 2 at both ends of the glue supply device 1 start to eject glue, and the glue is continuously ejected to the rear end of the vertical glue application scheduled part 4, in the longitudinal direction of the vertical glue application scheduled part 4. Glue 5 is applied linearly from the position of the crease f. It should be noted that the extension range of the glue 5 (the range that expands when a reinforcing flap and a front plate, which will be described later) are folded, is stored within the range of the vertical glue application scheduled portion 4 and the rear end of the vertical glue application planned portion 4 The paste 5 is applied so as to obtain a state in which the paste 5 extends to the vicinity (see FIG. 3).

Next, when the side glue application scheduled part 3 moves under the guns of the ten guns 2 corresponding to the side glue application scheduled part 3, the ten guns 2 simultaneously apply the glue in a short time. Discharging is performed so that the paste 5 discharged from each of the ten guns 2 is applied to the side paste application scheduled portion 3 in the form of dots. In each of the ten guns 2, the glue discharge to the side glue application scheduled portion 3 is performed by a single glue discharge operation, and the amount of glue discharged per discharge operation is as follows. Yes.
The glue that collides with the side glue application scheduled portion 3 and is applied to the glue application point in a dot-like manner expands in all directions due to crushing when the reinforcing flap is folded over the opposite surface of the front plate and pressure is applied. The amount of glue whose extension range 6 does not exceed the width in the direction perpendicular to the length of the side glue application scheduled portion 3 is set as the upper limit of the glue discharge amount per discharge operation. When the amount of glue exceeding the width in the direction orthogonal to the longitudinal direction of the lateral glue application scheduled portion 3 is defined as the amount of glue discharged, when the pressure is applied by folding the reinforcing flap on the opposing surface of the front plate, This is because glue may protrude from the joint between the reinforcing flap and the front plate. Thus, the amount of glue discharged per glue discharge operation is determined by the amount of glue applied to the side glue application scheduled portion 3 when the front plate and the reinforcing flap are folded over. By setting the amount to extend within the range of the planned portion 3, even if the horizontal paste application planned portion 3 is located along the rear end of the opposing surface of the front plate b as in the illustrated blank a, the folded portion is folded. Even if pressure is applied to crush the glue, the glue does not protrude toward the lower end side of the front plate b.

On the other hand, ten guns 2 in the glue supply device 1 are straight in a direction perpendicular to the conveying direction X including the gun 2 for applying glue to the vertical glue application scheduled portion 4 as shown in FIGS. The distance between the positions of the 12 guns 2 in the direction Y is the distance at which the extension ranges 6 of the pastes 5 adjacent to each other at the paste application point positions 3 in the horizontal glue application scheduled portion 3 shown in FIG. I have to. As a result, when the horizontal glue application scheduled portion 3 passes under the gun of the glue supply device 1, the glue is discharged from the ten guns 2 in a short time all at once with the above-mentioned adhesive discharge amount, and the paste application point position is extended. A dot-like paste 5 having an interval where the range 6 overlaps is applied to the horizontal paste application scheduled portion 3.
As shown in the drawing, the rear end of the vertical glue application planned portion 4 (the end on the rear side in the transport direction X) is set to be continuous with the end of the horizontal glue application planned portion 3, and this The extension range 6 of the glue 5 applied linearly to the vertical glue application scheduled portion 3 is overlapped with the extension range 6 of the glue 5 applied to the glue application point on the end side of the horizontal glue application scheduled portion 3. . Therefore, the guns at both ends of the glue supply device 1 are arranged such that the glue extension range 6 at the rear end of the vertical glue application scheduled part 4 and the glue extension range 6 at the end of the horizontal glue application scheduled part 3 overlap. 2 and the adjacent gun 2 in the direction Y are set. In the embodiment, the arrangement intervals of the 12 guns 2 in the direction Y orthogonal to the transport direction X are the same.

As described above, when the conveyed blank moves below the glue supply device 1, the two guns 2 ( Glue 5 is continuously ejected from both ends) and applied in a linear form, and then once in a short time from 10 guns 2 at the timing when the glue is applied to the lateral adhesive application scheduled portion 3 that has moved. The glue is discharged at the above discharge amount, and is applied in the form of dots.
When the blank to which glue has been applied by the glue supply device 1 advances downstream in the transport direction X of the glue supply device 1, the reinforcing flap connected to the front plate is folded by a folding mechanism (not shown). In the state where the reinforcing flap is folded on the opposite surface of the front plate, the pressure is applied so as to be sandwiched from above and below by a pressure roller or the like.
When this reinforcing flap is folded on the front plate and the above pressure is applied, the linear glue 5 at the vertical glue application scheduled portion 4 and the respective dotted glues 5 at the horizontal glue application scheduled portion 3 are crushed. Extend. As described above, the intervals of the 12 guns 2 are adjusted so that the extension ranges of the respective glues 5 overlap, and the extension ranges are made continuous with each other. For this reason, between the folded reinforcing flap and the front plate, a continuous bonding portion is formed from the position of the fold ruled line f to the end of the side glue application planned part 3 in the vertical glue application scheduled part 4; In the horizontal glue application scheduled part 3, a continuous bonded part is obtained so as to be continuous with the bonded part in the vertical glue application scheduled part 4 and along the longitudinal direction of the horizontal glue applied planned part 3. The position of n is surrounded by a crease and a bonded portion on three sides.

In the blank a, the side plate c and the back plate d other than the front plate are connected to the reinforcing flaps h via the folding rules f so that the folding rules f are folded on the opposing surfaces of the face plates, In order to bond the folded reinforcing flap and the opposing face plate, paste is applied to the opposing face. About this application | coating, it is made to extend along the conveyance direction X so that it may straddle each crease | fold rule f, and it is paste from the gun (not shown) arranged on the upstream side or the downstream side of the glue supply device 1 comprising the above 12 guns 2. In the same manner as the reinforcing flaps connected to the front plate after applying the paste, the reinforcing flaps are folded and bonded together by pressing with a pressure roller or the like. ing.
It is also possible to arrange guns for applying glue from the reinforcing flap to the side plate and applying glue from the reinforcing flap to the back plate in the direction in which the 12 guns of the glue supply device 1 are arranged. is there.

In the above embodiment, 12 guns are lined up in a row (blank transport direction) when applying glue to the three paste application scheduled areas surrounding the positions of the through holes on the opposing surface of the front plate of the blank with creases. Glue supply device 1 is configured in the direction perpendicular to X), and 10 guns are simultaneously ejected in a short time to apply glue so that the extension ranges of the glue attached to adjacent glue application points partially overlap each other. However, the present invention is not limited to this example.
In order to apply glue so that each of the adjacent glue application points overlaps and overlaps a part of the extension range of the glue in this way, as described below, in the blank conveyance direction X in the plurality of guns 2 The position is shifted back and forth, and the paste whose glue application point is adjacent in the horizontal glue application scheduled part 3 is discharged and applied from each gun 2 every time the horizontal glue application scheduled part 3 corresponds to the gun 2. be able to.

FIG. 4 schematically shows the arrangement of the gun 2 in the glue supply device 1 that allows the glue to be discharged with a time difference as seen from above. In this glue supply device 1, the arrangement of twelve guns 2 including the gun 2 that applies the glue to the longitudinal glue application scheduled portion 4 in a linear shape is expanded in the direction of conveyance X. Specifically, a set of three guns 2 (guns for the vertical glue application scheduled portion) located on the end side in the direction Y, and the three guns 2 for each set in front of the conveyance direction X Position is assigned in the order of rank, middle, and rear, four guns 2 are arranged in the front direction Y row, and four guns 2 are also arranged in the middle direction Y row, and the rear Similarly, four guns 2 are arranged in a row in the direction Y.
In the gun 2 where the glue application point is adjacent to the side where the glue application is planned 3, the distance in the direction Y is equal to the extension range 6 of the glue applied to the glue application point, as in the above embodiment. The gap is partly overlapped, the distance is the same, and the paste is continuously discharged to the gun 2 having the end of the side glue application scheduled part 3 as the glue application point and the part pasting the vertical glue application 4 The interval in the direction Y with the gun 2 is also the same as the interval (interval in the direction Y) of the gun 2 discharged to the side glue application scheduled portion 3.

As described above, in the glue supply device 1, the ten guns at which the glue application points are adjacent to each other in the side glue application scheduled portion 3 are arranged at the front, middle, and rear positions at the position in the blank transport direction X. The gun 2 that is displaced in position and discharges the glue to the vertical glue application scheduled portion 4 is also arranged so as to be displaced in the transport direction X. The arrangement of the guns 2 of the glue supply device 1 is shown in FIG. 4, and the 12 guns are shown as 2A, 2B,.
And when a blank is conveyed to this glue supply apparatus 1, it is controlled so that glue is discharged from the guns 2 (2A, 2B,..., 2L) corresponding to the respective application scheduled parts 3, 4. As shown in FIG. 5, first, when one vertical glue application scheduled portion 4 first moves from the tip side, the gun 2A corresponding to the vertical glue application scheduled portion 4 discharges the glue 5A. The discharge operation is continued until the rear end (A). Further, when the other vertical glue application scheduled portion 4 moves from the front end side, the discharge of the glue 5L is started by the corresponding gun 2L and the discharge is continued to the rear end (b). In order to facilitate the description in FIG. 5, the paste discharged by the guns 2 </ b> A, 2 </ b> B,..., 2 </ b> L is set to 5 </ b> A, 5 </ b> B,.

When the horizontal glue application scheduled portion 3 moves to the gun row at the front position, the front guns 2D, 2G, and 2J discharge the glue for a short time, and the horizontal glue planned portion 3 has a dotted glue. 5D, 5G, and 5J are applied (C). Next, when the horizontal glue application scheduled portion 3 moves to the middle row of guns, the middle guns 2B, 2E, 2H, and 2K discharge glue in a short time, and the dotted glue 5B. , 5E, 5H, 5K (d). Then, when the horizontal glue application scheduled portion 3 moves to the rear row of guns, the rear guns 2C, 2F, and 2I discharge the glue in a short time, and the dotted pastes 5C, 5F, 5I is applied (e).
In this way, the horizontal glue application scheduled portion 3 is applied with point-like glue at intervals where a part of the extension range overlaps, and the vertical glue planned portion 4 is applied with linear glue as described above. As in the embodiment, the position of the through hole can be surrounded by the continuous three-side bonded portion and the crease by folding and pressing the reinforcing flap.

  In addition, although the example which used 12 guns in the said Example was shown, this invention is not limited to this Example, The number of guns may be other than 12.

It is explanatory drawing which shows the paste supply apparatus which implements an example of the paste application | coating method in this invention, and the blank conveyed. It is explanatory drawing which shows the blank with which the paste was apply | coated by the method of this invention. It is explanatory drawing which shows the extension range of the glue in a horizontal glue application plan part and a vertical glue application plan part. It is explanatory drawing which shows the glue supply apparatus in another Example. It is explanatory drawing which shows the application order of the glue in another Example. It is explanatory drawing which shows the blank to which the adhesive agent was supplied with the conventional gun discharge method. It is explanatory drawing which shows schematically conveyance of the blank when supplying an adhesive agent by the gun discharge method. It is explanatory drawing which shows the blank which opened the through-hole. It is explanatory drawing which shows schematically conveyance of the blank in a pattern transfer system. It is explanatory drawing which shows the blank in which the adhesive agent application in the pattern transfer system was performed. Explanatory drawing which shows the blank to which the adhesive agent application by a pattern transfer system and a gun system was performed It is explanatory drawing which shows the glue accumulation of a paste plate edge part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Paste supply apparatus 2,2A, 2B, ..., 2L ... Gun 3 ... Horizontal paste application plan part 4 (of blank a) 4 ... Vertical paste application plan part 5,5A, 5B, ..., 5L ... Paste 6 ... Extension range a ... Blank b ... Front plate h ... Reinforcement flap n ... Through hole

Claims (3)

A blank for a carton having a face plate and a laminated face plate connected to the face plate so as to be foldable via a crease is sequentially conveyed in one direction, and the face plate and the overlapped face plate of the conveyed blank are folded. It is a paste application method for applying a paste for folding and bonding the face plate and the overlapping face plate to the opposite facing surface,
A part of the facing surface of the blank is set with a horizontal glue application planned portion along a direction orthogonal to the conveyance direction of the blank,
A plurality of guns are provided on the conveyance path through which the blank is conveyed, each of which is capable of intermittent discharge of glue toward the conveyance path side, and a plurality of guns that apply and apply glue to each of the horizontal glue application scheduled portions of the blank to be conveyed. The amount of glue discharged per one time from the gun to the horizontal glue application scheduled portion is determined by the amount of glue applied to the horizontal glue application scheduled portion between the face plates when the face plate and the overlapping face plate are folded. Set the amount to extend within the range where the horizontal glue is to be applied.
A plurality of guns are arranged with an interval of positions in a direction perpendicular to the transfer direction of the guns, an interval in which an extension range of adjacent pastes overlaps with a paste application point position in a side adhesive application scheduled portion,
Discharge the amount of glue from each gun at the timing when glue is applied to the side of the blank to be transported, and apply the glue in a discontinuous manner along the side of the glue to be applied. A paste application method characterized by the above.   The position in the conveyance direction of the blank of the gun where the glue application point is adjacent to the side where the glue application is planned is shifted forward and backward, and the glue where the glue application point is adjacent in the side glue application scheduled part is moved in the blank conveyance direction. The paste application method according to claim 1, wherein the paste is applied by being discharged from the gun whose position is moving back and forth. The crease between the face plate and the overlapping face plate is along a direction perpendicular to the conveyance direction of the blank, the side glue application scheduled portion is parallel to the crease, and the blank is It has a vertical glue application scheduled part extending from each end of the paste application planned part to the crease, and the vertical glue application scheduled part is aligned in the conveyance direction of the blank,
The glue which forms the bonding part which follows the conveyance direction of a flank is apply | coated to the said horizontal glue application plan part from two guns in which the said glue application point exists in the edge part side of a horizontal glue application plan part. Or the glue application | coating method of 2.

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