JP2012161752A - Adhesive coating apparatus, and method for controlling the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To more properly apply an adhesive according to the kind of a medium.SOLUTION: Paste forming patterns different in the size of a large dot group according to the thicknesses or unevennesses of paper kinds A-C are set as dot patterns different in the discharge amount of paste and a paste discharge head is controlled so that the set paste forming patterns may be formed to the adhesive surfaces of papers, so that the amount of the paste applied to the paper can be properly set according to the paper kinds. By this constitution, the adhesive can be more properly applied corresponding to the kind of paper.

Description

  The present invention relates to an adhesive application device that discharges an adhesive from a discharge head onto a medium and applies it in the form of dots, and a control method therefor.

  Conventionally, as this type of adhesive application device, an apparatus that applies an adhesive to an adhesive surface of a medium by ejecting droplets containing the adhesive by an inkjet method has been proposed (for example, see Patent Document 1). ). In this apparatus, in order to suppress the adhesive from protruding from the contour portion when bonded, the amount of adhesive applied per unit area in the contour portion is reduced compared to the central portion of the adhesive surface.

JP 2009-279358 A

  However, in the above-described apparatus, since the coating amount of the contour portion is uniformly reduced as compared with the central portion regardless of the type of the medium, there is a possibility that it cannot be appropriately bonded depending on the type of the medium. In particular, when paper is used as the medium, the thickness, flatness, adhesive penetration, and the like may vary greatly depending on the type of the paper.

  The main purpose of the adhesive applicator and the control method thereof according to the present invention is to apply the adhesive more appropriately according to the type of the medium.

  In order to achieve the above-described main object, the adhesive application device and the control method thereof according to the present invention employ the following means.

The adhesive application device of the present invention is
An adhesive application device that discharges an adhesive from a discharge head onto a medium and applies it in a dot shape,
Dot pattern setting means for setting a dot pattern in which the discharge amount of the adhesive is different according to the type of the medium;
And a control means for controlling the ejection head so that the set dot pattern is formed on the medium.

  In the adhesive application device of the present invention, dot patterns with different adhesive discharge amounts are set according to the type of medium, and the discharge head is controlled so that the set dot pattern is formed on the medium. Thereby, since the amount of the adhesive applied to the paper can be made suitable for the type of the medium, the adhesive can be more appropriately applied according to the type of the medium.

  Further, in the adhesive application device of the present invention, the dot pattern setting means uses a pattern in which dot groups formed by a plurality of dots are arranged in an island shape according to the type of the medium. The dot pattern may be set by changing the size. In this way, it is possible to set the dot pattern with a simple process as compared with the case where the discharge amount of the adhesive forming the individual dots is changed. In the adhesive application device of the present invention of this aspect, the dot pattern setting means is a means for setting the dot pattern so that the size of the dot group tends to increase as the medium becomes more uneven. You can also If it carries out like this, since it can suppress that an adhesive agent concentrates on the recessed part of a medium, an adhesive agent can be more appropriately apply | coated according to the unevenness | corrugation of a medium. Alternatively, in the adhesive application device of the present invention of this aspect, the dot pattern setting means is a means for setting the dot pattern so that the size of the dot group tends to be smaller as the type of the medium is thinner. It can also be. By doing so, it is possible to prevent the thin medium from absorbing the penetration of the adhesive and to be deformed into a wrinkle, so that the adhesive can be more appropriately applied according to the thickness of the medium. Further, in the adhesive application device of the present invention of these aspects, the dot pattern setting means uses at least one stage of dots using a plurality of stages of dot groups in which the number of dots is changed to a plurality of stages. The dot pattern may be set by changing the number of dots forming a group according to the type of the medium.

  In the adhesive application device according to the present invention, the dot pattern setting means derives a dot pattern corresponding to the type of the medium using a predetermined correspondence relationship between the type of the medium and the dot pattern. It can also be a means for setting the dot pattern. In this way, the dot pattern can be set quickly.

The control method of the adhesive application device of the present invention is:
A control method for an adhesive application device that discharges adhesive from a discharge head onto a medium and applies it in the form of dots,
(A) setting a dot pattern in which the discharge amount of the adhesive differs according to the type of the medium;
And (b) controlling the ejection head so that the set dot pattern is formed on the medium.

  In the control method of the adhesive application device of the present invention, a dot pattern having a different discharge amount of the adhesive is set according to the type of medium, and the discharge head is controlled so that the set dot pattern is formed on the medium. Thereby, since the amount of the adhesive applied to the paper can be made suitable for the type of the medium, the adhesive can be more appropriately applied according to the type of the medium. In addition, in this control method of the adhesive application device, various aspects of the above-described adhesive application device may be adopted, or steps for realizing each function of the above-described adhesive application device may be added. Good.

1 is a configuration diagram illustrating an example of a schematic configuration of a bookbinding system. FIG. 3 is a configuration diagram illustrating an example of a schematic configuration of a printing device 30 and a glue application device 50. 4 is an explanatory diagram illustrating an example of each process in the bookbinding system 10. FIG. The flowchart which shows an example of a paste application | coating process routine. Explanatory drawing which shows an example of the correspondence of a paper kind and a paste formation pattern. Explanatory drawing which shows the tendency of preparation of a paste formation pattern. Explanatory drawing which shows an example of the paste formation pattern of a modification. Explanatory drawing which shows an example of the paste formation pattern of a modification.

  Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram illustrating an example of a schematic configuration of a bookbinding system 10 including a glue application device 50 according to an embodiment of the present invention. FIG. 2 illustrates a printing device 30 and a glue application device 50 in the bookbinding system 10. FIG. 3 is an explanatory diagram showing an example of each step in the bookbinding system 10. As shown in FIGS. 1 and 2, the bookbinding system 10 of the present embodiment prints an image such as a photograph on the front surface (image forming surface) of the fed paper S (see FIG. 3 for each step). The printing apparatus 30 that performs printing, the paste application apparatus 50 that performs the paste application process of reversing the printed paper S and applying glue to the back (bonding surface) and bonding the bonding surfaces together, and the bonding surfaces are bonded together. A bookbinding apparatus 70 that performs a bookbinding process for binding the sheet S to a photobook PB in combination with a cover, and a computer 80 that controls the entire system. In this embodiment, the adhesive surface of the odd-numbered sheets S and the adhesive surface of the even-numbered sheets S are bonded together. In FIG. 2, each configuration of the printing apparatus 30 is surrounded by a one-dot chain line, and each configuration of the glue applying apparatus 50 is surrounded by a dotted line.

  As shown in FIG. 1, the printing apparatus 30 has a CPU, ROM, RAM, etc. (not shown) and controls the entire apparatus, and three paper feed trays 33a on which three types of paper S can be set. To 33c and paper feed rollers 34a to 34c (see FIG. 2) provided in each paper feed tray, and the like. And a printing mechanism 40 that ejects ink by an inkjet method. The three types of paper S are paper types A, B, and C such as glossy photographic paper, silky photographic paper, and matte paper. These paper types A, B, and C are different in paper size, paper thickness, and wavy unevenness. In this embodiment, the paper thickness is assumed that the paper type A is thin and the paper types B and C are thick, and the unevenness is the paper type. A and B are small and the paper type C is large.

  The print control unit 32 is communicably connected to the computer 80 and receives a print instruction from the computer 80 or transmits a print status to the computer 80. The print control unit 32 feeds the paper S from the tray in which the designated type of paper S is set among the paper feed trays 33a to 33c based on the designation of the type of the paper S included in the received print instruction. The paper feed mechanism 34 is controlled so that the print mechanism 40 is operated, or the print mechanism 40 is controlled to execute the print process on the paper S based on the print data included in the print instruction.

  As shown in FIG. 2, the printing mechanism 40 includes a carriage motor 43a disposed on the right side of the mechanical frame 40a, a driven roller 43b disposed on the left side of the mechanical frame 40a, and the carriage motor 43a and the driven roller. 43b, a carriage belt 43 looped in the left-right direction (main scanning direction), a carriage 41 driven by the carriage belt 43 as the carriage motor 43a is driven, and reciprocating left and right along the guide 42; An ink cartridge 44 that supplies ink of each color of cyan (C), magenta (M), yellow (Y), and black (K) to the carriage 41 via a tube (not shown), and each ink supplied from each ink cartridge 44 Pressure is applied to the paper S from a plurality of nozzles (not shown). The printing head 45 that performs printing, the conveyance roller 46 that conveys the paper S in the sub-scanning direction orthogonal to the main scanning direction, the drive motor 46a that drives the conveyance roller 46, and the paper S that is driven and printed by a motor (not shown). A paper discharge roller 47 for discharging paper to the cloth device 50 side is provided. The print head 45 has a plurality of nozzles (not shown) formed so that the dot density formed by the ejected ink is, for example, 720 dpi, 1440 dpi, and the like, and deforms the piezoelectric element by applying a voltage to the piezoelectric element. Although a method of pressurizing ink and discharging from each nozzle is adopted, a method of pressurizing ink by bubbles generated by applying a voltage to a heating resistor (for example, a heater) and heating the ink may be adopted. Good. .

  As shown in FIG. 1, the glue application device 50 has a CPU, ROM, RAM, etc. (not shown) and controls the entire device, a plurality of reversing rollers 54a to 54e (see FIG. 2), A reversing mechanism 54 that includes a guide roller (not shown) and the like that reverses the front and back of the paper S printed by the printing apparatus 30, and liquid paste is discharged onto the paper S reversed by the reversing mechanism 54 in the same manner as the ink jet method. A paste applying mechanism 60 that applies the adhesive and a bonding mechanism 56 that bonds the adhesive surfaces of the paper S on which the paste is applied by the adhesive applying mechanism 60.

  The glue application control unit 52 is communicably connected to the computer 80 and receives a glue application instruction from the computer 80 or transmits a glue application status to the computer 80. It is assumed that the glue application instruction includes designation of the type of the paper S as well as the print instruction. Upon receipt of the glue application instruction, the discharge controller 52 controls the reversing mechanism 54 so as to invert the printed paper S and supply the paper S to the glue application mechanism 60 one by one. The glue application mechanism 60 is controlled so that glue is applied to the adhesive surface of the paper S, and the bonding mechanism 56 is controlled so that the adhesive surfaces of the paper S to which the glue is applied are bonded together.

  The glue application mechanism 60 is configured in the same manner as the printing mechanism 40 except that it includes a liquid glue cartridge 64 and a glue discharge head 65 in place of the ink cartridge 44 and the print head 45 of the printing mechanism 40. For this reason, each component of the glue application mechanism 60 is denoted by a symbol obtained by adding a value 20 to the symbol of each component of the printing mechanism 40, and the description thereof is omitted. The glue ejection head 65 has a plurality of nozzles (not shown) so that the dot density formed by the glue to be ejected is, for example, 20 dpi, 60 dpi, 90 dpi, etc., and applies a voltage to the piezoelectric element in the same manner as the print head 45. In this way, the piezoelectric element is deformed and pressure is applied to the glue to discharge from each nozzle. However, the voltage is applied to the heating resistor (for example, a heater) to heat the glue and the glue is generated by bubbles. You may employ | adopt the system which pressurizes.

  The bonding mechanism 56 bonds the adhesive surfaces of the paper S in a state in which the paper S applied with glue by the glue applying mechanism 60 and discharged by the paper discharge roller 67 is pressed by a pressing mechanism (not shown). A pair of laminating rollers 56a and 56b, a transport roller 56c that transports the paper S to a predetermined standby position, and a guide 56d that guides the paper S by moving up and down between the laminating rollers 56a and 56b. Prepare. In this bonding mechanism 60, first, when the application of glue on the odd number of sheets S is completed, the bonding rollers 56a and 56b and the conveying roller 56c are in a state where the guide 56d is lowered (illustrated by a dotted line in the figure). Are forwardly rotated in the left direction in the drawing, whereby the sheet S is conveyed to a predetermined standby position through the upper surface of the guide 56d, and an odd number of sheets S are waited at the standby position. When the application of glue on the next even-numbered sheet S is completed, with the guide 56d raised (illustrated by a solid line in the figure), the transport roller 56c is reversed in the right direction in the figure and the odd number from the standby position. The sheet S is transported and the end of the odd-numbered sheet S (the end on the right side in the figure) is gripped by a gripping claw (not shown) of the laminating roller 56b, and the even number of claws (not shown) of the laminating roller 56a is held. The end of the sheet S (the left end in the figure) is held. The odd-numbered sheets S and even-numbered sheets are obtained by rotating the bonding roller 56a forward and reversing the bonding roller 56b while the pair of bonding rollers 56a and 56b are pressed against each other by a pressing mechanism (not shown). The adhesive surfaces of the sheets S are pasted together while pulling the sheets S downward in the figure. Then, when the paper S is pulled in to some extent, the holding of the paper S by the gripping claws of the bonding rollers 56a and 56b is released, and after the release, the paper S is drawn downward along with the rotation of the bonding rollers 56a and 56b. to paste together. Note that the sheet S with the adhesive surfaces bonded together is sent to the bookbinding apparatus 70 side.

  As shown in FIG. 1, the bookbinding apparatus 70 has a CPU, ROM, RAM, etc. (not shown) and controls the entire apparatus, and has a cover tray (not shown) and is discharged from the glue application device 50. The bookbinding mechanism 74 for binding the photobook PB with the cover sheet S supplied from the cover tray and the photobook PB bound by the bookbinding mechanism 74 having a discharge roller (not shown) and the like are discharged to the discharge tray 76a. A discharge mechanism 76.

  The bookbinding control unit 72 is communicably connected to the computer 80 and receives a bookbinding instruction from the computer 80 or transmits a bookbinding status to the computer 80. When the bookbinding control unit 72 receives the bookbinding instruction, the bookbinding control unit 72 controls the bookbinding mechanism 74 and the discharge mechanism 76 so that the sheet S sent from the glue applying device 50 is bound to the photobook PB and discharged based on the received bookbinding instruction. To do. In the bookbinding process, as shown in FIG. 3, the sheet S discharged from the glue applying device 50 and the cover are combined and, for example, the end (left end in the figure) of the sheet S is covered with a thread, wire, glue, or the like. Bookbinding by binding to the center of the inner surface. Since the bookbinding mechanism 74 and the discharge mechanism 76 do not form the core of the present invention, detailed description of each mechanism is omitted.

  The computer 80 includes a CPU 82 that performs various processes, a hard disk drive (HDD) 83 that stores various applications and data, a RAM 81 that temporarily stores data, and a display that displays various information. 86 and a general-purpose computer including a keyboard and an input device 88 such as a mouse for inputting various commands. The computer 80 accepts selection of an image to be printed and setting of the type of paper S via a user's operation of the input device 88 on a bookbinding setting screen (not shown) displayed on the display 86. Further, based on the received contents, a print instruction for the printing apparatus 30, a glue application instruction for the glue application apparatus 50, and a bookbinding instruction for the bookbinding apparatus 70 are generated. Then, a printing instruction is output to the printing apparatus 30, a printing situation from the printing apparatus 30 is input, a glue application instruction is output to the glue application apparatus 50 based on the inputted printing situation, and a glue application from the glue application apparatus 50 is performed. A cloth condition is input, a bookbinding instruction is output to the bookbinding apparatus 70 based on the input glue application condition, and a bookbinding condition from the bookbinding apparatus 70 is input.

  Next, the operation of the bookbinding system 10 of the present embodiment configured as described above, particularly the operation when applying glue to the paper S in the glue applying device 50 will be described. FIG. 4 is a flowchart illustrating an example of a glue application processing routine executed by the glue application control unit 52. This routine is executed when a glue application instruction from the computer 80 is received. When this routine is executed, the glue application control unit 52 first inputs the paper type included in the received glue application instruction (step S100), and the input paper type is any of the paper types A, B, and C. It is determined whether or not there is (step S110). If the paper type is paper type A, a glue formation pattern corresponding to the paper type A is set (step S120). If the paper type is B, a glue formation pattern corresponding to the paper type B is set (step S120). S130) In the case of the paper type C, a paste forming pattern corresponding to the paper type C is set (step S140). As described above, in the present embodiment, the paper types A, B, and C are the paper thickness that is the paper type A is thin and the paper types B and C are thick. C is assumed to be large.

  Here, in the present embodiment, the glue formation pattern corresponding to the determined paper type is derived and set from the correspondence table stored in advance in the ROM of the glue application control unit 52. FIG. 5 is an explanatory diagram showing an example of a correspondence table between paper types and glue formation patterns (dot patterns), and FIG. 6 is an explanatory diagram showing a tendency of creating glue formation patterns. Note that a black circle in FIG. 5 indicates one dot formed by discharging glue. As shown in FIG. 5, each glue forming pattern has an island shape of a small dot group formed by collecting four dots and a large dot group formed by collecting a larger number of dots than the small dot group. Pattern, that is, a group of two large and small dots is set as an island pattern. Each glue forming pattern has a different number of dots forming a large dot group in order to make the discharge amount of the glue different. Specifically, the number of dots forming the large dot group is 12 for the paper type A and 16 for the paper type B. A large dot group is formed with 21 pieces for paper type C. For this reason, it is possible to set a simpler pattern as compared with the case of changing the size of each dot itself, that is, changing the discharge amount of glue forming each dot. In addition, as shown in FIG. 6, the size of the large dot group is set so as to decrease as the paper thickness of the paper S decreases and to increase as the unevenness of the paper S increases. The reason for this will be described. First, when the paper thickness is thin, when the dot group is enlarged, the paper S may be partially deformed into a wrinkle shape without being able to absorb the glue that is partially concentrated and ejected. For this reason, by reducing the size of the dot group as the paper thickness is reduced, the amount of glue applied is reduced to prevent the glue from being partially concentrated. In addition, when the unevenness is large, if the dot group is made small, glue may be discharged only to the recessed portion and an appropriate adhesive force may not be obtained. For this reason, by increasing the size of the dot group as the unevenness increases, the paste is applied not only to the recesses but also to the protrusions. In the present embodiment, based on the tendency shown in FIG. 6 and the paper thicknesses and unevenness of the paper types A, B, and C, paste forming patterns having different large dot groups as shown in FIG. It was determined and stored in the ROM of the glue application control unit 52. For this reason, in the paper types A and B having the same unevenness, a paste forming pattern is set such that the paper type A having a small paper thickness is smaller in size of the large dot group than the paper type B, and the paper thickness is For the same paper types B and C, a paste formation pattern is set such that the size of the large dot group is larger for the paper type C with larger irregularities than for the paper type B. Since the paste formation pattern is derived from the correspondence table stored in advance, the paste formation pattern can be set quickly.

  When the glue formation pattern corresponding to the paper type is set in this way, glue ejection data as on / off data for ejection of each nozzle of the glue ejection head 65 is generated from the set glue formation pattern (step S150). Next, a paste application process is performed on the paper S based on the generated glue discharge data (step S160). This glue application process controls the carriage motor 63a so that the carriage 61 reciprocates in the main scanning direction and drives the piezoelectric element of the glue ejection head 65 so that glue is ejected onto the paper S based on the glue application data. This is performed by repeating the process of controlling the drive motor 66a so that the paper S is conveyed by a predetermined amount in the sub-scanning direction for each pass. When the glue application process is executed in this way, it is determined whether or not the process for all sheets S has been completed (step S170). If the process has not been completed, the process returns to step S160, and the process is repeated. Exit.

  Here, the correspondence between the components of the present embodiment and the components of the present invention will be clarified. The glue application control unit 52 of the glue application device 50 that executes the processes of steps S110 to S140 of the glue application process routine of FIG. 4 of this embodiment corresponds to the “dot pattern setting means” of the present invention, and the glue application of FIG. The glue application control unit 52 that executes the processing of steps S150 and S160 of the processing routine corresponds to a “control unit”. In the present embodiment, an example of the control method of the glue application device of the present invention is also clarified by explaining the operation of the glue application control unit 52.

  According to the glue application device 50 of the present embodiment described in detail above, a glue formation pattern is set as a dot pattern with a different amount of glue discharge depending on the paper type, and the set glue formation pattern is applied to the adhesive surface of the paper S. Since the glue discharge head 65 of the glue application mechanism 60 is controlled so as to be formed, the amount of glue applied to the paper S can be made suitable for the paper type, and the glue can be applied more appropriately according to the paper type. Can be applied.

  In addition, since the amount of glue discharged is changed by changing the number of dots forming the large dot group, the paste forming pattern is different from that for changing the amount of glue discharged itself for forming individual dots. It can be set more easily. Furthermore, since the large dot group of the paste forming pattern is set so that the paper S has a tendency to decrease as the paper thickness decreases and the unevenness of the paper S increases, it is more appropriate according to the paper thickness and unevenness. Glue can be discharged. Furthermore, since the glue formation pattern is derived and set from a predetermined correspondence table, the glue formation pattern can be set quickly.

  It should be noted that the present invention is not limited to the above-described embodiment, and it goes without saying that the present invention can be implemented in various modes as long as it belongs to the technical scope of the present invention.

  In the embodiment described above, the glue formation pattern is derived and set from a predetermined correspondence table. However, the present invention is not limited to this, and the glue formation pattern is created and set every time the glue application process is performed. It is good. In that case, the number of dots to be ejected to the adhesive surface, the ejection amount, and the like are calculated based on the thickness and unevenness of the paper S determined according to the paper type and the tendency of creating the glue formation pattern shown in FIG. The paste forming pattern may be selected and set according to the number of dots and the discharge amount.

  In the above-described embodiment, the paste formation pattern in which the size of the large dot group is different depending on the paper type is set. However, the present invention is not limited thereto, and the size of the small dot group is different depending on the paper type. A pattern may be set, or a paste forming pattern in which both the large dot group and the small dot group have different sizes may be set.

  In the above-described embodiment, the paste formation pattern is set based on the paper thickness and unevenness determined according to the paper type. However, the present invention is not limited to this, and any paste formation pattern can be set based on the paper type. It may be a thing. Further, the tendency of creating the paste formation pattern is not limited to the one determined based on the paper thickness and the unevenness, and may be determined based only on the paper thickness, or may be determined based only on the unevenness. Alternatively, it is possible to determine the tendency of creating a glue formation pattern taking into account the degree of paste penetration and surface roughness into the paper S, or to set the glue formation pattern.

  In the above-described embodiment, the description has been given on the assumption that there are three types of paper. However, it is sufficient that two or more types of paper are used, and four or more types of paper may be used.

  In the embodiment described above, the three paste formation patterns shown in FIG. 5 are set, but the present invention is not limited to this. 7 and 8 show an example of a paste forming pattern according to a modification. As shown in the figure, a paste forming pattern in which a large dot group with 12 dots and a small dot group with 5 dots are arranged in a staggered pattern may be set (FIG. 7A). Further, the present invention is not limited to using a dot group having a two-stage size of a large dot group and a small dot group, and a dot group having a size of three or more stages may be used (not shown), 1 It is good also as what has a dot group of the magnitude | size of a step (FIG.7 (b)-(f)). Furthermore, the direction of arrangement of each dot group is not constant, but may be two directions whose directions are different by 90 degrees (FIG. 7G), or the directions of each dot group are randomly arranged. (Not shown). And it is not restricted to what has a dot group, It is good also as what spaced apart the discharge interval of a dot for every predetermined number of dots (FIG.7 (h)). Or it is not restricted to what sets a paste formation pattern by repetition of a certain pattern like these, It is good also as what sets a random paste formation pattern which does not repeat a pattern (FIG. 8 (a), (b)). ). In this case, for example, a paste forming pattern may be set by an error diffusion method using a threshold value determined according to the paper type.

  In the above-described embodiment, the glue discharge amount is changed by the paste formation pattern based on the presence or absence of dot formation. However, the present invention is not limited to this, and the size of the dot itself is the same as the adjustment of the ink discharge amount in an inkjet printer. The amount of glue applied may be changed by adjusting the discharge amount by changing the thickness.

  In the above-described embodiment, the adhesive surface of the odd-numbered sheets S and the adhesive surface of the even-numbered sheets S are bonded together, but the present invention is not limited to this. For example, the odd-numbered paper S is folded in half and the adhesive surfaces after the mountain fold are bonded together, and the even-numbered paper S is folded in half and the adhesive surfaces after the mountain fold are bonded together It is good. Alternatively, the odd-numbered sheets S are valley-folded and the even-numbered sheets S are folded in half, and after the valley-folding, the odd-numbered sheets S and the even-numbered sheets S are bonded. The bonding surfaces (half surfaces) may be sequentially bonded.

  In the above-described embodiment, the glue applying device 50 includes the reversing mechanism 54 and the bonding mechanism 56 in addition to the glue applying mechanism 60. However, the present invention is not limited to this, and any adhesive coating mechanism 60 may be used. Only the cloth mechanism 60 may be provided, or one of the reversing mechanism 54 and the bonding mechanism 56 and the glue applying mechanism 60 may be provided. In addition, the glue applying device 50 is applied to the sheet S to be bound by being incorporated in the bookbinding system 10, but the present invention is not limited to this, and the glue applying device 50 may apply the glue to the medium alone. .

  In the above-described embodiment, the liquid paste is used. However, the present invention is not limited to this, and any adhesive that can be discharged from the discharge head may be used, and a gel-like adhesive may be used. Further, although the paper S is used as the medium, the present invention is not limited to this, and an adhesive may be applied to a medium of any material as long as the medium can be bonded, such as metal, plastic, rubber, and ceramic.

  10 bookbinding system, 30 printing device, 32 printing control unit, 33a, 33b, 33c paper feeding tray, 34 paper feeding mechanism, 34a, 34b, 34c paper feeding roller, 40 printing mechanism, 40a mechanical frame, 41 carriage, 42 guide, 43 Carriage belt, 43a Carriage motor, 43b Driven roller, 44 Ink cartridge, 45 Print head, 46 Transport roller, 46a Drive motor, 47 Paper discharge roller, 50 Glue application device, 52 Glue application controller, 54 Reversing mechanism, 54a, 54b, 54c, 54d, 54e Reverse roller, 56 bonding mechanism, 56a, 56b bonding roller, 56c transport roller, 56d guide, 60 glue application mechanism, 61 carriage, 62 guide, 63 carriage belt, 63a carriage motor 63b driven roller, 64 liquid glue cartridge, 65 glue ejection head, 66 transport roller, 66a drive motor, 67 paper ejection roller, 70 bookbinding device, 72 bookbinding control unit, 74 bookbinding mechanism, 76 ejection mechanism, 76a ejection tray, 80 Computer, 81 body, 82 CPU, 83 HDD, 84 RAM, 86 display, 88 input device, PB photo book, S paper.

Claims (7)

An adhesive application device that discharges an adhesive from a discharge head onto a medium and applies it in a dot shape,
Dot pattern setting means for setting a dot pattern in which the discharge amount of the adhesive is different according to the type of the medium;
An adhesive application device comprising: control means for controlling the ejection head so that the set dot pattern is formed on the medium.   The dot pattern setting means sets the dot pattern by changing the size of the dot group according to the type of the medium using a pattern in which dot groups formed by a plurality of dots are arranged in an island shape. The adhesive application device according to claim 1, which is means.   The adhesive application device according to claim 2, wherein the dot pattern setting unit is a unit that sets the dot pattern so that the size of the dot group tends to increase as the type of the medium has greater unevenness.   4. The adhesive application device according to claim 2, wherein the dot pattern setting means is a means for setting the dot pattern so that the size of the dot group becomes smaller as the type of the medium becomes thinner.   The dot pattern setting means determines the number of dots that form at least one stage dot group using a dot group having a plurality of stages with the number of dots changed to a plurality of stages according to the type of the medium. The adhesive application device according to any one of claims 2 to 4, which is means for setting the dot pattern by changing.   The dot pattern setting unit is a unit that sets the dot pattern by deriving a dot pattern corresponding to the type of the medium using a predetermined correspondence between the type of the medium and the dot pattern. Item 6. The adhesive application device according to any one of Items 1 to 5. A control method for an adhesive application device that discharges adhesive from a discharge head onto a medium and applies it in the form of dots,
(A) setting a dot pattern in which the discharge amount of the adhesive differs according to the type of the medium;
(B) controlling the ejection head so that the set dot pattern is formed on the medium.

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