JP2011219231A - Post-processing device and image forming system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent tearing and peeling of a cover by applying glue to a back part of a paper bundle and even to a side face portion of the paper bundle without complicating a machine configuration.SOLUTION: When an application roller 61 is moved from an application start position to a switching position, after lowering the application roller 61 in the switching position, a rotating direction of the application roller 61 is changed, and it is raised. By this, a formed accumulation of the glue P is crushed by the application roller 61, and in glue application in return to the application start position, the glue P is evenly overflowed even to a side part X along with the back part Sb of the paper bundle Sa, the glue is applied to the side part X of the paper bundle Sa in mounting of the cover, and tearing and peeling of the cover can be prevented.

Description

  The present invention relates to a post-processing apparatus and an image forming system.

  Various post-processing apparatuses have been proposed in which a plurality of sheets on which images are formed are bundled to form a sheet bundle, and the sheet bundle and a cover are bonded together with glue to produce a booklet (binding). For example, a post-processing device is connected to an image forming apparatus such as a copying machine or a printer, and a plurality of sheets of paper on which images are formed by the image forming apparatus are automatically bundled to form a sheet bundle. A booklet is prepared by adhering with glue.

  A general procedure for producing a booklet in the post-processing apparatus will be described. First, a plurality of sheets on which images are formed are stacked and aligned to form a sheet bundle. Next, paste is applied to the back of the stacked and aligned sheet bundle. Then, the cover sheet is conveyed and stopped at a predetermined position, and the cover sheet is bonded to the back of the sheet bundle. Through such a procedure, a plurality of sheets and a cover are integrated to produce a booklet.

  FIG. 12 shows an example of a booklet composed of a sheet bundle and a cover.

  FIG. 12A shows a state where the cover K is not folded, and FIG. 12B shows a state where the cover K is folded. As shown in FIG. 12A, the cover sheet K is moved and adhered in the direction of the arrow to the sheet bundle Sa with glue applied to the back Sb, and the sheet bundle Sa is covered with the cover sheet K in a U-shape. In the final form of the booklet, the side edge Se of the sheet bundle Sa and the side edge Ke of the cover K are aligned as shown in FIG.

  In the final form of the booklet shown in FIG. 12 (b), the front cover K1 and the back cover K2 of the folded cover K are not bonded to the sheet bundle Sa. When some external force is applied, the cover K1 and the like are easily torn, and the cover K is easily peeled off from the back portion Sb of the sheet bundle Sa. Accordingly, it is preferable to apply glue to the side surface portion X of the sheet bundle Sa in FIG. 12B to bond the front cover K1 or the back cover K2 and the sheet bundle Sa.

  Considering this point, a technique has been proposed in which binding is performed on the side surface portion X together with the back portion Sb of the sheet bundle Sa. For example, in the technique described in Patent Document 1, in the technique described in Patent Document 1, glue is applied to the back portion of the sheet bundle by a coating roller, and the coating arm is applied to the side surface portion of the sheet bundle. By applying glue.

JP 2004-188863 A

  However, in Patent Document 1, since a coating arm separate from the coating roller is used to apply the glue to the side surface portion of the sheet bundle, the mechanical configuration is complicated, and in some cases, the glue is used. There is also a possibility that the entire apparatus for coating is enlarged.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a post-processing device and an image forming system for preventing tearing and peeling of a cover by applying glue to the side portion of the sheet bundle as well as the back of the sheet bundle without complicating the mechanical configuration. It is to provide.

In order to achieve the above object, a post-processing apparatus according to the present invention includes:
1. A post-processing device for producing a booklet by adhering a cover to the back of a sheet bundle composed of a plurality of sheets,
An applicator roller that applies glue to the back of the paper bundle;
An elevating mechanism capable of moving the application roller up and down;
A moving unit that reciprocates the application roller between the application start position along the back of the sheet bundle and a switching position positioned in front of the edge of the back;
An adjustment unit that moves with the application roller and scrapes off a portion of the glue applied to the back of the sheet bundle to adjust the amount of glue applied;
A drive unit that rotates the application roller when the application roller reciprocates by the moving unit;
And at least the lifting mechanism, the moving unit, and a control unit for controlling the driving unit,
The controller applies glue while moving the application roller from the application start position to the switching position, then lowers the application roller at the switching position, and changes the rotation direction of the application roller in the lowered state. After the change, the post-processing apparatus controls the elevating mechanism, the moving unit, and the driving unit so as to apply the glue while raising the application roller and moving it to the application start position.

2. The adjustment unit is
A post-processing apparatus, comprising: a first adjustment unit that is located behind the application roller with respect to a moving direction when the application roller moves from the application start position to the switching position.

3. The adjustment unit is
3. The rear of the item 2, wherein the application roller has a second adjustment unit positioned behind the application roller with respect to a moving direction when the application roller moves from the switching position to the application start position. Processing equipment.

4). An image forming apparatus for forming an image of paper;
An image forming apparatus comprising: the post-processing apparatus according to any one of 1 to 3 that receives a sheet on which an image is formed by the image forming apparatus and forms a booklet using the sheet. system.

  According to the post-processing apparatus and the image forming system according to the present invention, the cover is prevented from being torn or peeled off by adding glue to the side portion of the sheet bundle as well as the back of the sheet bundle without complicating the mechanical configuration. I can do it.

1 is an overall configuration diagram of an image forming system. It is an explanatory view showing a sheet bundle clamping unit. It is explanatory drawing which shows a paste application part. It is a figure which shows an raising / lowering mechanism. It is a schematic perspective view of a cover sticking part. It is a schematic process drawing for demonstrating the process of bookbinding processing. It is explanatory drawing which shows the operation | movement which moves along the back part of a sheet bundle, rotating an application roller, and apply | coats glue. It is explanatory drawing which shows the operation | movement which moves along the back part of a sheet bundle, rotating an application roller, and apply | coats glue. It is explanatory drawing which shows the operation | movement which moves along the back part of a sheet bundle, rotating an application roller, and apply | coats glue. It is explanatory drawing which shows the operation | movement which moves along the back part of a sheet bundle, rotating an application roller, and apply | coats glue. It is sectional drawing which shows the adhesion state of a sheet bundle and a cover. It is explanatory drawing which shows an example of the booklet comprised by a sheet bundle and a cover.

  FIG. 1 is an overall configuration diagram of an image forming system according to the present invention.

  As shown in FIG. 1, the image forming system A includes an image forming apparatus B and a post-processing apparatus C. The sheet S on which the image is formed by the image forming apparatus B is conveyed from the image forming apparatus B to the post-processing apparatus C, and bookbinding processing is performed in the post-processing apparatus C. Hereinafter, the structures of the image forming apparatus B and the post-processing apparatus C will be described individually.

<Image forming apparatus B>
The image forming apparatus B includes an image forming unit in which a charging unit 2, an image exposing unit 3, a developing unit 4, a transfer unit 5 </ b> A, a charge removing unit 5 </ b> B, and a cleaning unit 6 are arranged around a rotating image carrier 1. The image forming unit uniformly charges the surface of the image carrier 1 by the charging unit 2 and then performs exposure scanning based on image data read from a document by a laser beam of the image exposure unit 3 or print data from a computer. Then, a latent image is formed, and the latent image is reversely developed by the developing unit 4 to form a toner image on the surface of the image carrier 1.

  The paper S fed from the paper storage unit 7A is conveyed to the transfer position, and the toner image is transferred onto the paper S by the transfer unit 5A at the transfer position. Thereafter, the sheet S is separated from the image carrier 1 after the charge on the back surface is erased by the charge eliminating portion 5B, and conveyed by the conveying portion 7B. The fixing unit 8 heats and fixes the toner image on the paper S, and the paper S on which the toner image is heat-fixed is discharged out of the image forming apparatus B by the paper discharge roller 7C.

  When image formation is performed on both sides of the sheet S, the sheet S heated and fixed by the fixing unit 8 is branched from the normal sheet discharge path by the conveyance path switching plate 7D. The sheet S that has been switched back and turned upside down in the reversing conveyance unit 7E passes through the image forming unit again to form an image on the back side, passes through the fixing unit 8, and then exits the image forming apparatus B by the paper discharge roller 7C. Discharged. The paper S discharged from the paper discharge roller 7C is sent to the post-processing device C.

<Post-processing device C>
The post-processing apparatus C includes a sheet transport unit 10, a sheet discharge unit 20, a cover sheet supply unit 30, a sheet bundle storage unit 40, a sheet bundle transport unit 50, a glue application unit 60, a cover sheet pasting unit 70, a cover folding unit 80, and a booklet transport. Part 90, sheet bundle clamping part 100, and booklet discharge guide part 110.

<Paper transport unit 10>
The paper S introduced into the paper transport unit 10 is nipped and transported by the entrance rollers 11 and 12, and is branched into either the paper discharge unit 20 or the paper bundle storage unit 40 by the transport path switching unit G1.

<Discharge unit 20>
When the paper transport unit 10 is set for general paper discharge without gluing and bookbinding, the transport path switching unit G1 blocks the transport path to the paper bundle storage unit 40 and opens the transport path to the paper discharge unit 20.

  The sheet S passing through the conveyance path of the sheet discharge unit 20 is nipped by the conveyance rollers 21 and 22 and conveyed upward, and is discharged and stored on the fixed sheet discharge table 24 at the top of the apparatus by the sheet discharge roller 23. On the fixed sheet discharge tray 24, the sheets S discharged from the image forming apparatus B can be directly received and a maximum of about 200 sheets can be stacked.

<Cover Supply Unit 30>
The cover sheet K stored in the sheet feeding tray 31 of the cover sheet supply unit 30 is separated and fed by the sheet feeding unit 32, is sandwiched between the conveyance rollers 33, 34, 35, and 36 and is conveyed to the cover sheet pasting position 301. The The size of the cover sheet K is a dimension obtained by adding the sheet width dimension, the front cover dimension, and the back cover dimension. After calculating the dimension of the cover sheet K, the cover sheet K is cut into a predetermined dimension by the cover cut section HD.

<Paper Bundle Storage Unit 40>
The sheet S branched by the transport path switching unit G1 is nipped by the transport rollers 37, 38, 39, and 41 and stacked while being sequentially aligned with a predetermined position of the sheet bundle storage unit 40, and is composed of a predetermined number of sheets S. A bundle Sa is formed. In order to align the sheets S conveyed one by one as the sheet bundle Sa, the sheet bundle storage unit 40 positions the inclined sheet placement table 42, the swingable sheet rear end positioning member 43, and the sheet width direction. The sheet width alignment member 44 and the like are configured.

<Paper bundle transport unit 50>
The sheet bundle Sa stacked while being aligned on the sheet placing table 42 of the sheet bundle receiving unit 40 is conveyed obliquely downward together with the sheet placing table 42 by the sheet bundle conveying unit 50. After the sheet bundle Sa stops at a predetermined position, the sheet bundle Sa turns and is positioned perpendicular to the first reference plane BP. Thereafter, the sheet bundle Sa is nipped by the sheet bundle nipping unit 100, and is raised to a position where the sheet rear end positioning member 43 can be retracted and stopped. Thereafter, the sheet placing table 42 is accommodated in the sheet bundle conveying unit 50, and is raised by the sheet bundle conveying unit 50 over the sheet bundle accommodating unit 40, and returns to a position where the sheets S printed from the image forming apparatus B are stacked.

<Paper bundle clamping unit 100>
The sheet bundle clamping unit 100 will be described with reference to FIG. FIG. 2 is an explanatory diagram showing the sheet bundle clamping unit 100. FIG. 2A is a schematic view of the sheet bundle holding unit 100 as viewed from the front, and FIG. 2B is a schematic perspective view of the sheet bundle holding unit 100.

  The sheet bundle nipping unit 100 includes nipping plates 101a and 101b for nipping the sheet S. The clamping plate 101a is attached to a moving member consisting of a screw 102 and a nut 103 via an arm, and the clamping plate 101b is fixed at a position facing the clamping plate 101a. The screw 102 is rotated by a motor M2 in which a torque limiter 104 is incorporated. Here, the motor M2 is a motor having a function of detecting the rotational speed, such as a servo motor or a pulse motor.

  The sandwiching plate 101b stands by at the reference position. When the sheet bundle Sa is sandwiched, the motor M2 is rotated, the sandwiching plate 101a is brought into contact with the sheet bundle Sa, and the sheet bundle Sa is moved in the direction of the sandwiching plate 101b. To do. When the sheet bundle Sa is clamped and the torque limiter 104 reaches the set torque, the rotation is not transmitted to the screw 102 even if the motor M2 rotates.

  The thickness dimension of the sheet bundle Sa can be calculated from the amount of movement from the initial position of the clamping plate 101a during the clamping operation of the sheet bundle Sa, and can be calculated from the number of encoder pulses of the servo motor or pulse motor. Further, the movement amount of the sandwiching plate 101a may be read and calculated by an optical sensor. Further, the thickness dimension of the sheet bundle Sa can be calculated from the number of sheets and the thickness per sheet. The thickness dimensions of the sheet bundle Sa are stored in the storage unit in the control unit C1 (see FIG. 1), and the thickness information I is used when the cover sheet size is cut by the cover sheet cutting unit HD, when glue is applied later, or when the glue is cooled. Sometimes used.

<Glue application part 60>
The glue application unit 60 will be described with reference to FIG. FIG. 3 is an explanatory diagram showing the glue application unit 60. FIG. 3A is a perspective view of the glue application unit 60, and FIG. 3B is a conceptual diagram of glue application by the glue application unit 60.

  The glue application unit 60 is installed below the sheet bundle clamping unit 100 shown in FIG. 2, and applies the glue P to the back portion Sb of the sheet bundle Sa held by the sheet bundle clamping unit 100. The glue application unit 60 includes an application roller 61 that applies the glue P to the back part Sb of the sheet bundle Sa, and a first glue molding plate (first adhesive) that scrapes a part of the glue P applied to the back part Sb of the sheet bundle Sa. 62 A of adjustment parts), the 2nd paste molding board (2nd adjustment part) 62B, and the paste container 63 which accommodates the paste P.

  The coating roller 61, the first glue molding plate 62A, the second glue molding plate 62B, and the glue container 63 are installed on a movable table 64. The coating roller 61 and the like are moved by a movable table 64 and a motor M4 (moving unit). Operation is possible to reciprocate between the application start position HP on the back side of the processing apparatus C and the switching position KI on the front side of the post-processing apparatus C to apply glue P to the back portion Sb of the sheet bundle Sa. (The movement direction from the application start position HP to the switching position KI is indicated by F, and the movement direction from the change position KI to the application start position HP is indicated by G). The glue application operation by the application roller 60 is performed while moving from the application start position HP to the switch position KI and while moving from the switch position KI to the application start position HP.

  The application roller 61, the first glue molding plate 62 </ b> A, the second glue molding plate 62 </ b> B, and the glue container 63 can be moved up and down by the lifting mechanism 65. FIG. 4 is a diagram simply showing the elevating mechanism 65.

  FIG. 4 shows a configuration in which the elevating mechanism 65 is incorporated in the glue container 63. The application roller 61 is incorporated in a moving glue container 63A in the glue container 63 together with the first glue molding plate 62A and the second glue molding plate 62B. The elevating mechanism 65 is movable with the fulcrum Fu1 as one side fulcrum, and the movable glue container 63A is configured at the movable end of the elevating mechanism 65 with the fulcrum Fu2 as one side fulcrum.

  In FIG. 4, (a) is a stationary position before applying the glue P, and the height HG1 of the application roller 61 is in a position where no glue can be applied. All the lifting mechanisms having the fulcrums Fu1 and Fu2 as fulcrums on one side are lowered.

  FIG. 4B shows a state where the moving glue container 63A is lifted with the fulcrum Fu2 as one fulcrum. At this time, the height HG2 of the application roller 61 is higher than HG1. This position is used as a position for creating a glue pool toward the G-direction glue P application at the switching position KI of the movable table 64 when the glue P is applied, which will be described later.

  FIG. 4C shows the paste P application position of the application roller 61. The application roller 61 shows a state in which the elevating mechanism 65 is lifted with the fulcrum Fu1 as one fulcrum in addition to the lifted state of the moving glue container 63A in FIG. At this time, the position HG3 is at the highest position on the application roller 61, and this state is the position for applying the glue to the back portion Sb of the booklet bundle Sa.

  When applying the paste P by the application roller 61, the application roller 61 and the like at the application start position HP have intervals between a first paste forming plate 62A, a second paste forming plate 62B, and a back portion Sb, which will be described later, t1, t2, respectively. It moves up to the position by the elevating mechanism 65 and moves in the F direction. The moving base 64 stops at the switching position KI, and the temporary application roller 61 and the like are lowered by the elevating mechanism 65 and the rotation direction of the application roller 61 is changed, and then the application roller 61 and the like are again raised to the glue application position by the elevating mechanism 65, Move in the G direction to the application start position HP. During the movement in the F direction and the movement in the G direction, the paste P is applied to the back portion Sb of the sheet bundle Sa by the application roller 61. When moving in the G direction and reaching the application start position HP, the application roller 61 and the like are lowered.

  The application roller 61 is rotated by a motor M3 (drive unit) to apply the hot melted paste P in the paste container 63 to the back portion Sb of the sheet bundle Sa. The application roller 61 can be rotated forward and backward by a motor M3. The motor M3 is controlled by the control unit C1 (see FIG. 1), and the rotation direction is switched at a predetermined timing.

  The first paste forming plate 62A and the second paste forming plate 62B follow the application roller 61 and move along the back portion Sb of the sheet bundle Sa, and scrape part of the paste P applied to the back portion Sb of the sheet bundle Sa. Then, the application amount of glue P is adjusted (the first glue molding plate 62A and the second glue molding plate 62B constitute the adjusting unit in the present invention).

  As shown in FIG. 3B, the interval t1 between the first paste forming plate 62A and the back portion Sb is different from the interval t2 between the second paste forming plate 62B and the back portion Sb, and the interval t2 is greater than the interval t1. Is wider. As will be described in detail later, the amount of glue P applied to the back portion Sb of the sheet bundle Sa when the application roller 61 moves in the F direction, and the amount of the sheet bundle Sa when the application roller 61 moves in the G direction. The amount of glue P applied to the back Sb is different.

  The glue P stored in the glue container 63 is liquefied and stored in a state optimal for glue application by a heat source (not shown) for heat melting. As an example, the set temperature of the heat source for heat melting is 180 ° C., and the temperature of the paste P in the paste container 63 is about 170 ° C. Since the hot-melt paste P has the property of solidifying at room temperature and liquefying at a predetermined high temperature, it can be easily distributed and stored, and can be evenly applied to the sheet bundle Sa by liquefying when applied to the sheet bundle Sa. It is.

<Cover pasting part 70>
The cover sticking part 70 is demonstrated using FIG. FIG. 5 is a schematic perspective view of the cover sticking portion 70.

  The cover sheet pasting unit 70 cuts the cover sheet K supplied from the cover sheet supply unit 30 into a predetermined size by the cover sheet cutting unit HD (see FIG. 1) based on the thickness information I of the sheet bundle Sa. The cut cover sheet K is conveyed to a predetermined position for gluing and binding with the sheet bundle Sa by the conveyance belts 71 and 72.

  The cover pasting unit 70 includes a pressure member 73 that presses the cover K against the glue application surface of the sheet bundle Sa, a cover folding unit 80, a movable housing 74 that supports the pressure member 73 and the cover folding unit 80, It is comprised from the drive part (not shown) which enables the movement housing | casing 74 to move to a vertical up-down direction.

  When the cover sheet K is transported by the transport belts 71 and 72 and stops at a predetermined position, the movable housing 74 moves to the first reference plane BP (see FIG. 2). On the first reference surface BP, the central portion of the conveyed cover sheet K and the adhesive application surface of the sheet bundle Sa that is optimally cooled for pasting the cover sheet are pressed against each other by the pressurizing member 73 and securely bonded. The

<Cover folding part 80>
The cover folding portion 80 will be described with reference to FIG. FIG. 6 is a schematic process diagram for explaining the bookbinding process.

  As shown in FIGS. 6A, 6 </ b> B, and 6 </ b> C, the cover folding portion 80 is raised and the cover K is bonded to the glue application surface of the sheet bundle Sa. Further, a pair of symmetrical folding members 81 of the cover sheet folding portion 80 move in the thickness direction of the sheet bundle Sa by the rotation of the motor M1, and bend the cover sheet K along the side edge of the paste application surface of the sheet bundle Sa. FIG. 6D is a bookbinding completed drawing.

<Booklet transport unit 90>
The booklet transport unit 90 will be described with reference to FIG. The booklet BK on which the cover K is pasted on the back Sb of the sheet bundle Sa to which the glue is applied to form the front cover and the back cover is perpendicular to the first reference surface BP together with the movable casing 74 (see FIG. 5). After moving downward and moving to the second reference plane BP2, the booklet BK is tilted counterclockwise in FIG.

  The booklet BK is transported by the booklet transport unit 90 and discharged from the booklet discharge guide unit 110 to the outside of the apparatus, and is placed on the lifting / discharging tray 121 of the booklet storage unit 120 and sequentially stacked. When the booklet BK is ejected and stacked on the lifting / lowering tray 121, the lifting / lowering tray 121 is sequentially lowered.

  As described above with reference to FIGS. 1 to 6, the booklet BK is automatically produced using the sheet S conveyed from the image forming apparatus A by the operation of each unit of the post-processing apparatus C.

<Glue application operation by application roller>
Next, the point that the paste P is applied to the back portion Sb of the sheet bundle Sa by the application roller 61 and the sheet bundle Sa and the cover sheet K are bonded together will be described.

  As described above, in the post-processing apparatus C according to the present embodiment, the application roller 61 and the like in the glue application unit 60 move along the back part Sb of the sheet bundle Sa and apply glue. At this time, the glue P is applied to the back portion Sb of the sheet bundle Sa by appropriately controlling the rotation direction of the application roller 61 and the distance between the application roller 61 and the back portion Sb of the sheet bundle Sa to generate the accumulation of glue P. To do. This point will be described in detail with reference to FIGS.

  7-10 is explanatory drawing which shows the operation | movement which moves along the back part Sb of the sheet bundle Sa, rotating the application roller 61, and applies the glue P to the back part Sb.

  When applying glue to the back portion Sb of the sheet bundle Sa, first, when the movable table 64 moves to the application start position HP (see FIG. 3) at a position past the edge of the back portion Sb of the sheet bundle Sa, the lifting mechanism 65 After the application roller 61 and the like are raised to the paste P application position, the application roller 61 is moved in the F direction shown in FIG. At the time of movement in the F direction, the application roller 61 is rotated in the arrow direction shown in FIG. 7 by the motor M3 (see FIG. 3) (forward rotation with respect to the movement direction), and the glue P in the glue container 63 is transferred to the sheet bundle Sa. It is applied to the back portion Sb. The moving speed of the moving table 64 in the F direction is 200 mm / sec, and the peripheral speed of the application roller 61 is 200 mm / sec.

  Part of the paste P applied by the application roller 61 is scraped off by the first paste molding plate 62A located behind the application roller 61 with respect to the moving direction (F direction), and the application of the adhesive P to the back portion Sb is performed. The amount is adjusted. Since the distance between the first paste forming plate 62A and the back portion Sb is set narrow, when the application roller 61 or the like moves in the F direction from the application start position HP to the switching position KI, the paste is applied to the back portion Sb of the sheet bundle Sa. P is thinly applied.

  When the moving table 64 moves in the F direction while the application roller 61 rotates in the direction of the arrow shown in FIG. 7, and the moving table 64 reaches the switching position KI in front of the other end edge of the back portion Sb of the sheet bundle Sa, FIG. As shown, the moving table 64 temporarily stops, and the application roller 61 and the like are lowered by a specified amount by the elevating mechanism 65. At this time, the control unit C1 (see FIG. 1) causes the motor M3 to rotate the application roller 61 in the direction of the arrow in FIG. 7 for a short time, and then reverse the rotation to change the rotation direction of the application roller 61.

  By the operation of the movable table 64 at the switching position KI, the paste P is not separated from the back portion Sb between the application roller 61 and the back portion Sb, and as shown in FIG. 8, the first paste forming plate 62A and the back portion Sb. In addition, a large glue pool is formed in the Y area (the area where the movable base 64 regulates the glue P in the glue application operation from the application start position HP to the switching position KI), which is an area between the application rollers 61.

  Even when the movable table 64 is temporarily stopped at the switching position KI, the coating roller 61 continues to rotate in the direction of the arrow in FIG. 8 and continues to form a large glue pool created in the Y area, and enough glue P is accumulated in the Y area. It becomes a state.

  The large glue pool in the Y region is applied in the F direction while finishing applying the glue P to the back Sb, and is supplemented with a slightly insufficient glue P in preparation for the start of applying the glue P to the back Sb in the G direction. A sufficient amount of glue P can be applied from the position KI to the back portion Sb.

  After the moving table 64 temporarily stops at the switching position KI, the moving table 64 is raised by a specified amount by the elevating mechanism 65 and is ready for the glue application operation in the G direction up to the application start position HP. As the movable table 64 rises, as shown in FIG. 9A, the glue P sufficiently accumulated in the Y region is crushed by the application roller 61, and both side portions X (hereinafter referred to as side portions) beside the back portion Sb. (Referred to as X). This is shown in FIG.

  The moving table 64 moves in the G direction shown in FIG. 10A in order to return from the switching position KI to the application start position HP. When the movable table 64 moves in the G direction, the application roller 61 rotates in the direction of the arrow shown in FIG. 10A (forward rotation with respect to the moving direction), and the glue P sufficiently accumulated in the Y region is the back portion Sb. It is applied to the back portion Sb of the sheet bundle Sa using the application roller 61 and the first glue molding plate 62A, and is optimally regulated by the second glue molding plate 62B.

  The application of the glue P in the G direction moves while a large amount of the glue P wraps around the side portion X. The glue P sneaking around to the side X is uniformly formed on the back Sb as shown in FIG. 10B after the application roller 61 and the second glue molding plate 62B are moved.

  The moving speed of the moving table 64 in the G direction is 250 mm / sec, and the peripheral speed of the application roller 61 is 250 mm / sec.

  When the movable table 64 moves in the G direction and applies glue P to the back portion Sb of the sheet bundle Sa and returns to the application start position HP, the application roller 61 and the like are lowered by the elevating mechanism 65, and the application roller 61 also rotates. Stop and the application of glue P is completed.

  FIG. 11 is a cross-sectional view showing an adhesion state between the sheet bundle and the cover.

  7-10, the paste P is uniformly applied to the back portion Sb of the sheet bundle Sa as shown in FIG. 10B. After the glue is applied, the sheet bundle Sa and the cover sheet K are pressed against each other by the cover sheet attaching section 70. The cover sheet K is bent and the cover sheet K is bent along the side edge of the glue application surface of the sheet bundle Sa.

  Since the paste P is uniformly applied to the back portion Sb of the sheet bundle Sa as shown in FIG. 10B, the paste P on the back portion Sb is pressed by the cover K and uniformly wraps around both side portions X of the back portion Sb. As shown in FIG. 11, the front cover K1 and the back cover K2 are bonded to the sheet bundle Sa. As a result, when the user turns the front cover K1 or the like or when some external force is applied to the booklet BK, the side cover X is adhered, so that the front cover K1 or the like is difficult to tear, and the front cover K is not attached to the sheet bundle Sa. Hard to peel off from the back Sb.

  As described above with reference to FIGS. 7 to 11, after the application roller 61 moves from the application start position HP to the switching position KI, the application roller 61 and the like are lowered by the elevating mechanism 65 at the switching position KI and the application roller rotates. By changing the direction, a sufficient accumulation of glue P can be generated. In this state, the application roller is moved up to the application position by the elevating mechanism 65, and a sufficient amount of glue P of the created glue P is crushed by the application roller 61 and the back portion Sb of the sheet bundle Sa over the entire G direction glue application. The glue P can be applied to the back Sb so that the glue P protrudes uniformly on the side X.

  As a result, a separate member for applying the glue P to the side portion X of the sheet bundle Sa is not provided, and the paste P is uniformly interposed between the back portion Sb and the side portion X of the sheet bundle Sa, and the sheet bundle Sa. And cover K can be bonded. That is, without complicating the mechanical configuration, the cover P can be applied to the side portion X of the sheet bundle as well as the back portion Sb of the sheet bundle to prevent the tearing or peeling of the cover sheet.

  In particular, when the sheet bundle Sa is thick, the applicator roller 61 and the like at the switching position KI are lowered by the elevating mechanism 65 and the rotation direction of the applicator roller is changed to generate a sufficient accumulation of glue P. This is effective for uniform application to the back portion Sb including the switching position KI of the glue P and uniform side glue formation on both side portions X when the cover K is attached.

  Although the present invention has been described with the embodiment shown in FIGS. 1 to 12, the present invention is not limited to the embodiment, and the present invention can be modified or added without departing from the gist of the present invention. included.

  In the present embodiment, the switching position KI for the reciprocating operation of the movable table 64 is in the vicinity of the end of the sheet bundle Sa. However, the switching position KI for the reciprocating operation is provided in the middle of the back portion Sb of the sheet bundle Sa. The form which apply | coats the paste P only to a part of back part Sb and the side part X may be sufficient.

  The drive portion of the elevating mechanism 65 can be dealt with in various forms such as a motor or solenoid and a cam mechanism, and is not particularly limited.

  In the present embodiment, the control unit C1 that controls the operations of the motors M3 and M4 is provided in the post-processing apparatus B. However, even if the operations of the motors M3 and M4 are controlled by the control unit provided in the image forming apparatus B. Good.

  Further, by setting the post-processing device C as a system with the image forming device B, for example, after the sheet bundle storage unit 40 moves the sheet bundle to the glue applying unit 60, the next sheet bundle is received, thereby the glue binding. System productivity can be significantly improved.

A Image forming system B Image forming device BK Booklet C Post-processing device C1 Control unit HP Application start position K Cover K1 Front cover K2 Back cover KI Switching position M1, M2, M3, M4 Motor P Glue Sa Paper bundle Sb Back X Side DESCRIPTION OF SYMBOLS 10 Paper conveyance part 20 Paper discharge part 30 Cover sheet supply part 40 Paper bundle accommodating part 50 Paper bundle conveyance part 60 Glue application part 61 Application roller 62A 1st glue molding board 62A 2nd glue molding board 63 Glue container 64 Moving stand 65 Lifting mechanism 70 Cover Covering Section 80 Cover Bending Section 90 Booklet Conveying Section 100 Sheet Bunch Clamping Section 110 Booklet Discharge Guide Section 120 Booklet Storage Section

Claims (4)

A post-processing device for producing a booklet by adhering a cover to the back of a sheet bundle composed of a plurality of sheets,
An applicator roller that applies glue to the back of the paper bundle;
An elevating mechanism capable of moving the application roller up and down;
A moving unit that reciprocates the application roller between the application start position along the back of the sheet bundle and a switching position positioned in front of the edge of the back;
An adjustment unit that moves with the application roller and scrapes off a portion of the glue applied to the back of the sheet bundle to adjust the amount of glue applied;
A drive unit that rotates the application roller when the application roller reciprocates by the moving unit;
And at least the lifting mechanism, the moving unit, and a control unit for controlling the driving unit,
The controller applies glue while moving the application roller from the application start position to the switching position, then lowers the application roller at the switching position, and changes the rotation direction of the application roller in the lowered state. After the change, the post-processing apparatus controls the elevating mechanism, the moving unit, and the driving unit so as to apply the glue while raising the application roller and moving it to the application start position. The adjustment unit is
A post-processing apparatus, comprising: a first adjustment unit that is located behind the application roller with respect to a moving direction when the application roller moves from the application start position to the switching position. The adjustment unit is
The apparatus according to claim 2, further comprising: a second adjustment unit that is located rearward of the application roller with respect to a moving direction when the application roller moves from the switching position to the application start position. Post-processing device. An image forming apparatus for forming an image of paper;
An image processing apparatus comprising: a post-processing device according to claim 1, which receives a sheet on which an image is formed by the image forming apparatus and forms a booklet using the sheet. Forming system.

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