JP2009220975A - Paste injection nozzle, and apparatus and method for applying paste to roll-type paper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide high quality roll-type paper provided with paste at a tail for retaining a winding state of the roll-type paper of which the adhesion at the tail is not easily peeled off, but can be easily removed when using the roll-type paper. <P>SOLUTION: A paste application device 31 for the roll-type paper having a movable paste injection nozzle has a plurality of injection holes 13 at the paste injection nozzle 11 for applying the paste to the roll-type paper 1 not to overlap with each other when it is injected from each injection hole 13. Paste is applied over the entire width of the roll-type paper 1 while drawing a plurality of orbits, thus providing adhesion for retaining the winding state at the tail 2 that is not easily peeled off before using, but can be easily removed when using. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a paste spray nozzle, a paste application device for roll-shaped paper provided with a paste spray nozzle, and a paste application method for roll-shaped paper.

  Rolled paper such as toilet paper and paper towels keep the winding state by adhering the tail and log outer periphery with glue in a linear or spot shape across the entire width, leaving a margin at the tail edge. . Gluing for the adhesion is performed by, for example, a device that sprays glue from a traveling glue spray nozzle and applies glue to roll paper (for example, see Patent Document 1), or rolls a linear object to which glue has adhered. This is carried out with an apparatus (see, for example, Patent Documents 2 and 3) for applying glue by contacting the tail of the paper.

The glue application device provided with the traveling type glue injection nozzle can easily cope with the glue application to the roll paper of various items by replacing the glue injection nozzle, and the glue described in Patent Documents 2 and 3 Compared with a device that applies a paste by bringing a linear object attached to the tail of a rolled paper into contact with the tail of the roll paper, there is an advantage that equipment space can be saved. However, in Patent Document 2, it is difficult to adjust the position and amount of glue applied to the roll-shaped paper by the glue application device provided with a traveling glue injection nozzle. In an apparatus for applying glue on roll-shaped paper by spraying glue from a traveling glue spray nozzle described in Patent Document 1, the amount of glue to be applied in a mode in which glue is dotted at intervals on the roll-shaped paper Attempts to overcome adjustment difficulties.
Japanese Examined Patent Publication 63-63453 JP 2006-131400 A JP 2007-284251 A

  However, even when glue is applied to the roll paper by the technique described above, there still remains a problem that the tail of the roll paper is peeled off and the winding is peeled off before use. In order to cope with this problem, if the amount of glue to be applied is increased in order to reinforce the adhesion of the tail, the glue penetrates to the inner layer of the log of the roll paper, and the tail adhesive portion is difficult to peel off during use. Occasionally, the glue penetrated and the layers of paper partly adhered, causing problems such as tearing the paper in the winding direction when unwinding. In the paste application device provided with the traveling type paste injection nozzle, since it has the advantages described above compared with the paste application device of the other modes described in Patent Documents 2 and 3, it is difficult to peel off before use, and Therefore, it has been desired to develop a technique for realizing tail gluing that is easily peeled off when used.

  The present invention relates to a glue injection nozzle for realizing a gluing that can achieve both stable adhesion before use and ease of peeling at the time of use for gluing related to tail adhesion of roll-shaped paper, and a roll having a glue injection nozzle It is an object of the present invention to provide a paper paste applying apparatus and a roll paper applying method.

  The present invention employs the following means in order to solve the problems described above. That is, the present invention relates to a technique for producing a roll-shaped paper in which a tail is stably bonded by gluing for maintaining a wound state. In addition, the present invention relates to a technique for producing a roll-shaped paper having ease of peeling off of tail adhesion during use.

[1] An inflow port through which glue flows into the interior, and the glue that has flowed in from the inflow port converges in a certain region on the roll-shaped paper, and at least of the paste application portions of each other on the roll-shaped paper A paste injection nozzle having a plurality of injection holes formed in a direction of injection so as not to partially overlap each other.

[2] The paste spray nozzle according to [1], wherein the plurality of spray holes are arranged in a row at intervals on a tip surface.

[3] The paste injection nozzle according to [1] or [2], in which the plurality of injection holes are formed on a tip surface, and the injection holes are formed so that the injection directions are parallel to each other.

[4] The paste injection nozzle according to any one of [1] to [3] is provided, and further, the winding of the roll-shaped paper is released and adhered to the outer peripheral surface of the log when the roll-shaped paper is wound. After applying the glue to the tail adhesive part or the log outer peripheral adhesive part by exposing the log outer peripheral adhesive part of the log outer peripheral surface that adheres to the tail adhesive part during winding or holding the roll paper When the roll holding means for winding the roll paper again and the tail adhesive portion or the log outer periphery adhesive portion are exposed, glue is applied to the tail adhesive portion or the log outer peripheral adhesive portion of the roll paper. A glue jetting means that has the glue jet nozzle in a state in which a plurality of the jet holes are directed in the direction of the jet, and jets the glue toward the tail adhesive part or the log outer peripheral adhesive part Supporting the glue jetting means, and in the width direction of the roll-shaped paper so that the glue jetted from the plurality of jetting holes of the glue jet nozzle does not overlap each other in the tail glue part or the log outer circumference glue part. A roll paper paste applying apparatus, comprising: a traveling means for causing the glue injection means to travel.

[5] The tail of the roll paper is exposed by exposing a tail adhesive portion that adheres to the log outer peripheral surface when winding the roll paper, or a log outer peripheral adhesive portion of the log outer peripheral surface that adheres to the tail adhesive portion when winding the roll paper. The position of the spray hole is moved while spraying the paste from the plurality of spray holes so that the locus of the paste does not overlap with each other at the adhesive part or the log outer periphery adhesive part, and a plurality of papers are moved in the width direction of the roll-shaped paper. Glue application method for roll paper that applies glue as lines.

  The glue injection nozzle of the present invention can apply the glue uniformly to the object with the minimum necessary. The glue application apparatus provided with the glue injection nozzle of the present invention enables gluing with sufficient adhesive force and ease of peeling to the tail adhesion part or log outer circumference adhesion part of roll paper. The method for applying glue on roll-shaped paper of the present invention can reduce the problem of the tail being peeled off and releasing the winding before the start of use, and the tail can be easily peeled off during use to release the winding. Roll paper can be provided.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the following embodiments, and changes, modifications, and improvements can be added without departing from the scope of the invention.

  Roll paper (also referred to as sanitary paper roll) refers to a roll paper product used mainly in a toilet or kitchen, such as a toilet roll or paper towel. In general, unlike other paper products, roll paper has high water absorption and sometimes high solubility in moisture, so when applying liquid paste for adhesion, it is necessary to fine-tune the amount of paste appropriately. Is done. Each part name of the roll-shaped paper 1 demonstrated in this specification is defined using FIG. 6A and FIG. 6B. A roll of paper (rolled paper) is referred to as log 3. The end of the paper winding is called tail 2. In order to maintain the roll-up state of the roll paper, the tail end portion and the log outer peripheral surface are bonded to the tail adhesive portion 4 on the tail side and the log outer peripheral portion 5 on the log outer peripheral surface side. .

  The structure of the paste injection nozzle 11 will be described with reference to FIGS. 1A and 1B showing an embodiment of the injection nozzle of the present invention. The paste injection nozzle 11 has an inlet 12 through which glue flows and an injection hole 13 through which paste is injected to the outside. In addition, you may have the storage chamber 16 for storing glue until the glue which flowed in from the inflow port is injected from an injection hole.

  The glue injection nozzle 11 of the present invention includes a plurality of injection holes 13. The number of the injection holes 13 is 2 to 4, preferably 2 or 3, and most preferably 2 injection holes 13. When the number of the injection holes 13 is increased, the diameter of the injection holes 13 may be reduced in order to prevent application of excessive glue. Since the injection hole 13 is easily clogged by reducing the diameter of the injection hole 13, when the liquid paste having a composition that easily causes clogging is injected, the number of the injection holes 13 that can have a relatively large diameter is 2 It is preferable to use a single glue injection nozzle 11. If the number of the injection holes 13 is 5 or more, it is necessary to reduce the diameter of the injection holes 13 to the extent that clogging frequently occurs with the glue usually used for tail adhesion of roll paper. It is not suitable for the embodiment of the paste injection nozzle 13 of the present invention. On the other hand, when the number of the injection holes 13 is one, it is not suitable because adjustment for applying the paste uniformly to the roll paper is difficult so that the paste does not penetrate into the log 3. The shape of the opening 19 on the side from which the paste is ejected may be circular, elliptical, polygonal, star-shaped, or the like.

  When the circular linear injection holes 13 shown in FIG. 1B are two glue injection nozzles 11, the diameter of the injection holes 13 is preferably 0.30 mm to 0.40 mm in a one-ply type toilet roll, preferably Is preferably 0.35 mm. In the case of a two-ply type toilet roll, 0.40 mm to 0.50 mm is preferable, and 0.45 mm is preferable. When the injection direction 15 is parallel, the interval between the two injection holes 13 is 3 to 8 mm for both the 1-ply type and the 2-ply type, preferably 5 mm for the 1-ply type and for the 2-ply type. It may be 3 mm. In addition, the injection direction 25 means the advancing direction of the glue which passes through the center part of the exit of the injection hole 13, that is, the direction to reach the center part of the cross section of the injected glue which will be described later.

  The material for the paste injection nozzle 11 may be any material that can be sealed so that the liquid paste does not leak from the portions other than the inlet 12 and the injection hole 13. For example, the material of the glue injection nozzle 11 may be a metal such as stainless steel. Moreover, you may form a paste injection nozzle from the material which has corrosion durability.

  The shape of the outer peripheral portion of the paste spray nozzle 11 can be determined according to the structure of the portion to which the paste application device 31 is attached. For example, when the paste spray nozzle 11 is mounted on the paste applicator 31, a flat outer flat portion is formed on a part of the outer peripheral portion of the paste spray nozzle 11 so that the arrangement of the spray holes 13 and the spray direction 25 are accurately determined. 18 (see FIG. 1A) or a structure having a groove.

  There are mainly two types of patterns in which the liquid paste is ejected from the ejection holes 13: a straight pattern and a full cone pattern. The paste spray nozzle 11 of the present invention may select any spray pattern. As shown in FIG. 2A, the straight pattern is a spray pattern in which the glue sprayed from the spray holes 13 reaches the object linearly without spreading radially, and the cross-section of the sprayed glue is dotted. . In order to inject the paste in a straight pattern, the injection hole 13 may be a linear tunnel shape that penetrates the member of the paste injection nozzle, and the injection hole inner wall portion 17 may have a smooth structure. On the other hand, as shown in FIG. 2B, the full cone pattern is an injection pattern in which the paste injected from the injection holes 13 spreads radially and reaches the object, and the cross-section of the injected paste fills the paste without any gaps. The so-called full circle pattern is shown. In order to inject the paste with a full cone pattern, the injection hole 13 forms a spiral groove in the injection hole inner wall portion 17 as shown in FIG. 2B, for example. Due to such a shape of the injection hole inner wall portion 17, the glue advances linearly in the central portion of the injection hole 13, while rotating around the spiral groove of the injection hole inner wall portion 17 in the peripheral portion of the injection hole 13. As the glue progresses, the glue is ejected radially from the ejection holes 13. The injection hole 13 of the paste injection nozzle 11 of the present invention may have a shape capable of realizing any of the above two injection patterns as long as the action described below is satisfied.

  3A to 3C schematically show a mode in which glue is sprayed from the spray hole 13 of the glue spray nozzle 11 and a mode in which glue is applied on the roll-shaped paper 1. First, as shown in FIG. 3A, the injection hole 13 of the paste injection nozzle 11 may be arranged away from the roll-shaped paper 1. In this case, the paste sprayed from a certain spray hole 13 a passes through the paste spray path 22 a and reaches the roll-shaped paper 1, thereby forming a paste application portion 23 a on the roll-shaped paper 1. 1stly, the paste injected from the several injection hole 13 of the paste injection nozzle 11 of this invention is converged and apply | coated to the roll-shaped paper 1 which is a target object in a fixed area | region. For this purpose, for example, a plurality of injection holes 13 are formed so that the intervals are narrowed as shown in FIG. 3A so as to penetrate in parallel in a straight line, or the injection holes 13 provided at intervals as shown in FIG. 3B. It is good to form so that it may become the injection direction 25 which goes to a center part from a peripheral part. For example, in the case where glue is applied to the tail adhesive portion 4 of the toilet roll, the injection direction 25 is determined so that the adhesive application region 24 converges within a range of 0.5 to 2.0 cm in diameter, and the injection holes 13 are formed. Is good.

  Secondly, the paste spray nozzle 11 of the present invention is characterized in that at least a part of the paste application portion 23 of the paste sprayed from each spray hole 13 is not overlapped with the roll-shaped paper 1 which is a glue object. And In order to prevent the glue application portions 23 from overlapping, for example, the diameter of the injection holes 13 is reduced, the interval between the injection holes 13 is increased, and the injection direction 25 is parallel or the injection direction 25 is the center. It is preferable to use the paste injection nozzle 11 having a configuration such as forming the injection holes 13 so as to go from to the periphery. If the glue application region 24 can converge to a predetermined range, the glue injection nozzle 11 configured to prevent the glue application part 23 from overlapping at all by adjusting the configuration of the injection holes 13 as exemplified above. It is preferable that

  As shown in FIG. 1A and FIG. 1B, the paste injection nozzle 11 of the present invention has a shape having a tip surface 14 in which all the injection holes 13 are opened so that the plurality of injection holes 13 are all formed on one plane. It is good. In this case, the injection hole 13 is formed by penetrating the tip portion 15 constituting the tip surface 14.

  Further, as shown in FIGS. 4A and 4D, all of the plurality of injection holes 13 may have a structure in which the front end surface 14 is opened in a row with a space. When three or more injection holes 13 are provided on the distal end surface 14, the injection holes 13 are preferably formed in a line at equal intervals. In this case, one line means that the center of the injection hole 13 is arranged on a straight line. The reason why it is preferable to form the injection holes 13 in a row at equal intervals is that when the paste injection nozzle 11 having the above-described configuration is run perpendicular to the alignment direction of the injection holes 13, the injection holes 13 arranged at equal intervals are arranged. This is because glue can be applied as the same number of lines, and uniform glue application, that is, a so-called uniform flow distribution is achieved in the cross section in the winding direction of the tail adhesive portion 4.

  Furthermore, you may form the several injection hole 13 so that the injection direction 25 of each injection hole 13 may become mutually parallel. For example, as shown in FIG. 1B and FIG. 3A, the plurality of injection holes 13 linearly penetrate the tip portion 15 constituting the tip surface 14, and the penetration directions of all the injection holes 13 are parallel to each other. It is good to form.

  FIG. 5 shows an outline of an embodiment in which the roll paper glue applying device 31 of the present invention applies glue to the tail adhesive portion 4 of the roll paper 1. FIG. 5 shows an embodiment in which glue is applied to the tail adhesion portion 4. Instead of applying glue to the tail bonding part 4, glue may be applied to the outer periphery bonding part 5 (not shown). The roll paper glue application device 31 includes three means: glue injection means 33, roll holding means 32, and traveling means 34.

  The roll holding means 32 of the present invention shown in FIG. 5 will be described. The roll holding means 32 of the present invention releases the winding of the tail 2 of the roll-shaped paper 1, exposes the tail adhesive portion 4 or the log outer peripheral adhesive portion 5, and glue is applied to the tail adhesive portion 4 or the log outer peripheral adhesive portion 5. It is configured to perform an operation of holding in a state where it can be applied. In addition, the roll holding means 32 is configured to perform an operation of winding the tail 2 around the log 3 after the glue is applied to the tail bonding portion 4 or the log outer periphery bonding portion 5. The series of operations of the roll holding means 32 described above is an embodiment in which the glue is accurately applied to the tail adhesive portion 4 or the log outer periphery adhesive portion 5 and then the tail 2 can be wound around the log 3. That's fine. For the operation of releasing the winding of the tail 2, for example, a configuration in which the log 3 is rolled while the tip of the tail 2 is fixed, or the tail 2 is blown by blowing air to the tip of the tail 2. It is good to have a configuration that operates. The operation of holding the tail adhesive part 4 or the log outer peripheral adhesive part 5 in a state where the adhesive can be applied by exposing the tail adhesive part 4 or the log outer peripheral adhesive part 5, for example, a structure for holding the tail 2 and the log 3 with an arm etc. When it is configured to operate to fix the tail 2 by blowing air to the surface of the tail 2 having the tail bonding surface 4 or sucking the surface of the tail 2 opposite to the surface having the tail bonding surface 4. Good.

  The glue injection means 33 of the present invention will be described. The paste injection means 33 of the present invention includes the above-described paste injection nozzle 11. As shown in FIG. 5, the glue injection nozzle 11 is sprayed with glue so that all the injection directions 25 of the plurality of injection holes 13 are determined with respect to the tail bonding part 4 or the log outer periphery bonding part 5 (not shown). The means 33 is equipped.

  The traveling means 34 of the present invention will be described. The travel means 34 is configured to support the paste injection means 33 and at least the portion including the paste injection nozzle 11, and travel this in the width direction of the roll-shaped paper 1. In the support of the glue jetting means 33 by the running means 34, when the glue jetting means 33 runs in the width direction of the roll-shaped paper 1, the glue jetting is performed so that the glue jetted from each jet hole 13 of the glue jet nozzle 11 does not overlap. Note that a nozzle 11 is provided. When all the injection holes 13 are opened in the front end surface 14, the traveling unit 34 is configured so that the traveling direction 36 (the width of the roll-shaped paper 1) of the glue ejecting unit 33, as shown in FIGS. 4A, 4B, and 4D, for example. It is preferable to support the paste injection means 33 by installing the paste injection nozzle 11 so that the positions of the injection holes 13 are different on the coordinate axis perpendicular to the direction. On the other hand, as shown in FIG. 4C, when the positions of the injection holes 13 are the same on the coordinate axis perpendicular to the traveling direction 36 of the roll-shaped paper 1 (the width direction of the roll-shaped paper), the glue injected from the different injection holes 13 Since the lines are overlapped with each other, they are not suitable for the mode of supporting the paste injection means 33 by the traveling means 34 of the present invention. For example, as shown in FIG. 5, rails are arranged in the width direction of the roll paper 1 so that the paste can be applied to the tail adhesion portion 4 or the log outer circumference adhesion portion 5 over the entire width of the roll paper 1. And it is good also as a structure which the part provided with at least the paste injection nozzle 11 among the paste injection means 33 drive | works along a rail. Moreover, it is good also as a structure which the part provided with at least the paste injection nozzle 11 of the paste injection means 33 runs in the width direction of the roll-shaped paper 1 by a movable arm (not shown).

  The operation and effect of the glue injection nozzle 11 and the roll paper glue application device 31 of the present invention will be described. First, the glue injection nozzle 11 and the roll-like paper glue application device 31 of the present invention have a configuration in which the injection holes 13 are formed so as to converge within a predetermined range and apply glue as shown in FIG. 3A. By doing so, the paste can be accurately applied to a limited area of the roll-shaped paper 1, that is, the tail adhesive portion 4 or the log outer peripheral adhesive portion 5. As a result, it is possible to realize the gluing of the tail 2 that concentrates the adhesive surface and is difficult to peel off. On the other hand, in the glue application by the glue spray nozzle 11 and the roll-like paper glue applicator 31 which does not have the above-described action and does not fall within the scope of the present invention, as shown in FIG. In order to secure the adhesive strength on the surface, the flow density must be increased until the risk of internal penetration of the paste increases, and the paste penetrates into the interior.

  3A shows a paste spray nozzle 11 and a glue applicator 31 according to the present invention in which the spray holes 13 are formed so that at least a part of the paste application portions 23 of the glue sprayed from the plurality of spray holes 13 do not overlap. As described above, the amount of paste applied per unit area of the roll-shaped paper, that is, the flow rate density is uniform, so-called uniform flow distribution. In particular, the paste injection nozzle 11 and the paste application device 31 of the present invention that injects the paste from the plurality of injection holes 13 have a more uniform flow rate distribution by the addition of the adhesives injected from the injection holes 13. Realize. Also, as shown in FIGS. 4A, 4B, and 4D, the paste is applied as a plurality of lines so that the paste injected from the plurality of injection holes 13 does not overlap when the paste injection means 33 travels. Since the glue application device 31 of the present invention has such a configuration, the glue can be applied over the entire width of the roll-shaped paper 1 while maintaining the above-described effects. Because of these effects, the minimum amount of glue that permeation is limited is applied to each layer of the tail adhesive portion 4 and the log outer peripheral adhesive portion 5 over the entire width of the roll-shaped paper 1, and it is difficult to peel off before use. Can be easily glued to the tail. On the other hand, as shown in FIG. 3B and FIG. 4C, the paste injection nozzle 11 and the paste application device 31 that do not correspond to the present invention in which the injection holes 13 are formed so that the adhesive injected from the plurality of injection holes 13 completely overlap, A so-called chevron-shaped flow distribution having a locally high flow density is exhibited, and there is a high risk of penetration of glue into the log 3, and a roll-like paper is produced in which the tail glue is difficult to peel off during use.

  As for the apparatus relating to the production of rolled paper, it is practically required to produce many items such as toilet rolls and paper towels with the same apparatus. The roll-like paper paste application device 31 of the present invention can be easily changed by replacing the paste injection nozzles 11 with different diameters of the injection holes 13 and can be easily cleaned by attaching and detaching. It is superior to an apparatus (see Patent Documents 2 and 3) that applies a glue by bringing a filament with glue on the surface into contact with the tail of a roll paper. Further, the apparatus for applying the glue by bringing the linear object to which the glue is attached into contact with the tail of the roll-shaped paper requires a space provided with the linear object as a component for applying the glue over the entire width of the roll-shaped paper 1. To do. On the other hand, the roll paper paste application device 31 of the present invention can be coped with by providing the travel type paste spray nozzle 11 which is smaller than the width of the roll paper 1 instead.

  EXAMPLES Hereinafter, although this invention is demonstrated further in detail based on an Example, this invention is not limited to these Examples.

(1) Paste injection nozzle The paste injection nozzle 11 used in Examples 1 to 3 and Comparative Examples 1 and 2 is made of stainless steel (SUS), and as shown in FIG. It is assumed to have a shape of the appearance that is open and the storage chamber 16. In the paste injection nozzle 11 of Example 2, the three injection holes 13 were opened on the tip surface 14 so as to be aligned in a straight line (see FIG. 4D). The paste injection nozzles 13 in Examples 1 to 3 and Comparative Examples 1 and 2 pass through the tip 15 as a circular and linear tunnel shape as shown in FIG. 1B, and the injection hole inner wall surface 17 is smooth. Shaped. The diameter of the paste injection hole 13 in Examples 1 to 3 and Comparative Examples 1 and 2 (the diameter of the opening 19), and the interval between the openings 19 on the tip surface 14 when a plurality of injection holes 13 are provided Is shown in Table 1. In Example 2, the openings 19 were arranged at equal intervals with the distance shown in Table 1.

  It is the table | surface showing the number of the injection holes in the paste injection nozzle, the diameter of the opening part of an injection hole, the space | interval of an opening part, and the kind of the toilet rail which is a target object.

(2) Rolled Paper As shown in Table 1, in Examples 1 and 2 and Comparative Example 1, a 1-ply type toilet roll 1 was used as an object to be glued. In Example 3 and Comparative Example 2, a 2-ply type toilet roll 1 was used as an object to be glued.

(3) Paste The paste used in Examples 1 to 3 and Comparative Examples 1 and 2 was a cellulose derivative (pH 6.0, viscosity 400 mPas / 30 ° C., manufacturer / Japan NSC, product number / TV506).

(4) Glue coating device The glue coating device 31 in Examples 1 to 3 and Comparative Examples 1 and 2 was configured as shown in FIG. The roll holding means 32 is configured such that the tail adhesive portion 4 is exposed and held upward. The glue injection means 33 in Examples 1 to 3 and Comparative Examples 1 and 2 include the glue injection nozzles 11 of Examples 1 to 3 and Comparative Examples 1 and 2 described above, respectively. The paste injection nozzle 11 was equipped so that the injection direction 25 of the hole 13 was directed. In addition, the paste injection nozzles 13 of Examples 1 to 3 were provided such that the arrangement direction of the injection holes 13 was orthogonal to the width direction of the toilet roll 1 as shown in FIG. 4D. As shown in FIG. 5, the travel means 34 is a rail-type travel means 34, and the glue injection means 33 supported along the rail travels in the width direction over the entire width of the toilet roll 1. The traveling means 34 supported the glue injection means 33 so that the distance from the opening 19 of the injection hole 13 to the tail adhesion part 4 was 4 cm.

  The spraying of the glue from the injection hole 13 was performed while the traveling means 34 traveled when the tail adhesion portion 4 was exposed. In Examples 1 to 3 and Comparative Examples 1 and 2, the amount of paste sprayed per unit time of the paste spray nozzle 13, the traveling speed of the paste spray nozzle 13, the width of the region to which the paste is applied (the paste coating width), and Table 2 shows the amount of glue applied per one roll of the toilet roll 1.

  The amount of glue sprayed from the glue spray nozzle per unit time (glue spray quantity), the traveling speed of the glue spray nozzle, the width of the area where glue is applied (glue application width), and per roll of toilet roll It is the table | surface showing the quantity of the paste applied, and the kind of toilet rail of a target object. In Examples 1 to 3, the amount of glue applied per roll is about half that of Comparative Example 1 or 2 to be compared.

  After applying glue to the tail bonding part 4, the tail 2 was wound around the log 3 and the tail 2 was bonded.

(5) Evaluation Examples 1 and 2 and Comparative Example 1 in which a 1-ply type toilet roll 1 is an object are evaluated. The stability of the adhesion of the tail 2 was good for the toilet roll 1 obtained in Examples 1 and 2. The ease of peeling off of the tail 2 was good in Examples 1 and 2, and the penetration of the glue was limited to one layer each of the tail adhesive portion 4 and the log outer peripheral adhesive portion 5. On the other hand, in Comparative Example 1, an excessive adhesion due to the penetration of glue over several layers often occurred, and a toilet roll 1 in which a defect occurred when the adhesion of the tail 2 was peeled was also obtained. About the quantity of the paste apply | coated per roll of the toilet roll 1, Examples 1 and 2 were about half of the comparative example 1 (refer Table 2). Therefore, Examples 1 and 2 also have an effect of saving glue amount. This also shows that the penetration of glue into the paper inside is prevented by reducing the amount of glue applied. In Example 2, there was a problem that the injection hole 13 was clogged during operation of the glue application device. This is considered because the diameter of the opening 19 of the injection hole 13 of Example 2 is small. When the above is evaluated comprehensively, the aspect of Example 1 is suitable for applying glue on the one-ply type toilet roll 1.

  Evaluation of Example 3 and Comparative Example 2 in which a 2-ply type toilet roll 1 is an object is performed. The stability of the adhesion of the tail 2 was good for the toilet roll 1 obtained in Example 2. The ease of peeling off of the tail 2 was good in Example 2, and the penetration of the glue was limited to one layer each of the tail adhesive portion 4 and the log outer peripheral adhesive portion 5. On the other hand, in Comparative Example 2, excessive adhesion due to the penetration of glue over several layers often occurred, and a toilet roll 1 in which trouble occurred when peeling off the tail 2 was also obtained. In terms of the amount of glue applied per roll of the toilet roll 1, Example 3 was approximately half the amount of Comparative Example 2 (see Table 2). Therefore, Example 3 also has the effect of saving glue amount. This also shows that the penetration of glue into the paper inside is prevented by reducing the amount of glue applied. When the above is evaluated comprehensively, the aspect of Example 3 is suitable for applying glue on the two-ply type toilet roll 1.

  According to the paste spray nozzle according to the present invention, the roll paper paste applicator provided with the paste spray nozzle, and the roll paper paste coating method, the occurrence of defects in the roll paper due to peeling off of the tail is suppressed. Production efficiency is improved, and high-quality roll paper can be provided.

It is a perspective view of the paste injection nozzle of one embodiment of the present invention. It is sectional drawing of the paste injection nozzle of one embodiment of this invention. It is a figure showing the straight pattern which is one mode of an injection pattern. It is the figure showing the full cone pattern which is one aspect | mode of the injection pattern. It is a figure explaining a mode that paste injected from two injection holes is applied to roll-shaped paper. It is a figure explaining a mode that paste injected from two injection holes is applied to roll-shaped paper. It is a figure explaining a mode that paste injected from two injection holes is applied to roll-shaped paper. It is a figure explaining the case where several (4 pieces) injection holes are formed in a line at the paste injection nozzle tip side. It is a figure explaining the case where a plurality of injection holes are formed in the paste injection nozzle tip side instead of one line. It is the figure showing the one aspect | mode which drive | works a glue injection nozzle so that the glue injected from the several injection hole may mutually overlap. It is a figure explaining the case where a plurality of (three) injection holes are formed in a line on the front end surface of the paste injection nozzle. It is the figure which showed the outline | summary which the paste application | coating apparatus of the roll-shaped paper of one embodiment of this invention applies glue to a tail adhesion part. It is the perspective view and sectional drawing of the edge part of the roll-shaped paper in a tail winding state. It is a perspective view of the roll-shaped paper in a tail release state.

Explanation of symbols

1: roll paper (toilet roll), 2: tail, 3: log, 4: tail adhesion part, 5: log outer periphery adhesion part, 6: picking margin, 11: glue injection nozzle, 12: inlet, 13: injection Hole, 13a, 13b, 13c, 13d: injection hole, 14: tip surface, 15: tip part, 16: storage chamber, 17: inner wall part of injection hole, 18: outer flat part, 19: opening part, 21: glue, 22: glue injection path, 22a, 22b, 22c, 22d: glue injection path, 23: glue application part, 23a, 23b, 23c, 23d: glue application part, 24: glue application area, 25: injection direction, 31: glue application Cloth device, 32: roll holding means, 33: glue injection means, 34: travel means, 35: glue supply path, 36: travel direction.

Claims (5)

An inlet through which glue flows in,
Formed in such a direction that the glue flowing in from the inflow port converges within a certain area on the roll-shaped paper and is sprayed so that at least a part of each glue application portion does not overlap on the roll-shaped paper. A plurality of injection holes formed,
Having a glue injection nozzle.   The paste injection nozzle according to claim 1, wherein the plurality of injection holes are arranged in a row at intervals on a front end surface.   The paste injection nozzle according to claim 1 or 2, wherein the injection holes are formed so that a plurality of the injection holes are formed in a front end surface and the injection directions are parallel to each other. The paste spray nozzle according to any one of claims 1 to 3, further comprising:
Release the winding of the roll paper and expose the tail adhesive part that adheres to the log outer peripheral surface when winding the roll paper or the log outer peripheral adhesive part of the log outer peripheral surface that adheres to the tail adhesive part when winding. Roll holding means for holding the roll-shaped paper and winding the roll-shaped paper again after applying glue to the tail adhesive portion or the log outer peripheral adhesive portion;
When the tail adhesive part or the log outer peripheral adhesive part is exposed, a plurality of the injection holes are directed in a direction in which glue is applied to the tail adhesive part or the log outer peripheral adhesive part of the roll-shaped paper A paste spraying means for spraying glue toward the tail bonding part or the log outer periphery bonding part;
The paste is supported in the width direction of the roll-shaped paper so as to support the glue jetting means and so that the glue jetted from the plurality of jetting holes of the glue jetting nozzle does not overlap with each other at the tail adhesive portion or the log outer peripheral adhesive portion. Traveling means for traveling the injection means;
A roll-type paper glue applicator comprising:   Exposing the tail adhesive part that adheres to the log outer peripheral surface when winding the roll-shaped paper or the log outer peripheral adhesive part of the log outer peripheral surface that adheres to the tail adhesive part when winding the roll-shaped paper, The position of the spray hole is moved while spraying the paste from a plurality of spray holes so that the track of the paste does not overlap each other at the log outer periphery adhesion portion, and the glue is formed as a plurality of lines in the width direction of the roll paper. The paste application method of the roll-shaped paper which apply | coats.

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