JP2002337478A - Method and equipment for bookbinding with adhesive paste - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the adhesion between paper sheets, between the paper sheet and a front cover and between the paper sheet and a back cover, to ensure the strength of adhesion of the shelfback part of a booklet and to improve the quality of finished bookbinding. SOLUTION: The equipment for bookbinding with an adhesive paste has at least two sets of paste discharge means, a first paste discharge means 80A1 for forming a first linear paste coat part N1 along the lateral end part of the paper sheet in the course of carriage of the paper sheet and a second paste discharge means 80A2 for forming a second linear paste coat part N2 in the vicinity of the lateral end part of the paper sheet parallel to the first paste coat part N1, a carrying means for carrying the front cover Ka and the paper sheet S and passing them through the positions of disposition of the first paste discharge means 80A1 and the second paste discharge means 80A2, an adjusting means for adjusting the paper sheets S having the first paste coat part N1 and the second paste coat part N2 formed, so as to form a paper sheet bundle Sa, and a first bending means 93 and a second bending means 94 for bending the front cover Ka at a right angle along the spine part of the paper sheet bundle Sa.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is to produce a booklet by applying glue in the form of a line in the vicinity of a side edge of a sheet on an image-formed sheet and covering one side edge of the sheet bundle with a cover sheet. The present invention relates to a glue binding method and a glue binding apparatus.
The present invention relates to a glue binding apparatus that is connected to an image forming apparatus such as a facsimile apparatus and a printer, or is applicable to an image forming apparatus.

[0002]

2. Description of the Related Art Generally, paper on which an image is recorded by a main body of an image forming apparatus such as a copying machine, a facsimile machine, a printer, and a multifunction peripheral thereof is subjected to post-processing such as punching, stapling, and saddle stitching. Various processes such as folding, attaching a cover, folding, stamping, and glue binding are performed.

[0003] As a glue binding apparatus, (1) a device that discharges glue onto paper using a glue discharge nozzle, (2) a glue wheel is installed in a glue storage box, and glue is attached to the outer periphery of a rotating glue wheel. ,
A device that makes the outer periphery of the glue wheel contact the paper to transfer the contact,
(3) a hot melt coating device that discharges a mixture of a hot melt agent (heat fusing agent) and heated compressed air from a nozzle;
(4) a tape sticking device for sticking one side edge of a sheet bundle while heating a tape to which adhesive paste is applied in advance;
Etc. are used.

The gluing method and apparatus described in Japanese Patent Application Laid-Open No. 7-80377 is to blow high-pressure air onto glue discharged from a glue discharging nozzle to form a thin film.

[0005] The bookbinding apparatus described in JP-T-59-500907 deflects a sheet conveyed in a first direction in a second conveyance direction orthogonal to the conveyance direction, and then deflects the end of the traveling sheet. The glue is applied linearly to the portion, and after the stacking and alignment, pressure is applied to bookbinding.

As the bookbinding method using a backside tape, there is a method in which a tape on which adhesive having adhesive property is applied before heating is applied while heating or a tape on which adhesive having adhesive property is applied in advance containing water is used. It has been known. Conventional tape-attaching methods are described in JP-A-62-284795, U.S. Pat. No. 4,985,729, and
It is disclosed in, for example, JP-A-151286.

[0007]

The conventional glue binding apparatus has the following problems.

(1) In the backside tape bonding method, the tape is stuck on the spine of the sheet bundle and then folded on the front cover side and the back cover side. If the tape can be attached with high reliability, the structure of the device becomes complicated and the device becomes large.

(2) The method of wrapping a sheet bundle and bonding the back surface of the sheet bundle with a cover sheet in which the front cover and the back cover are integrated requires a cover length corresponding to the maximum thickness of the sheet bundle. It is necessary to use a special large-sized cover sheet and, after adhering the cover sheet, a step of cutting off and removing an extra cover part protruding from the sheet bundle.

[0010] (3) The booklet is formed by gluing the sheets and gluing the cover sheet over the booklet, and pressing the throat of the booklet strongly. If the adhesive strength at the back of the booklet is weak, the sheet May be damaged.

(4) A glue binding apparatus for gluing and binding a sheet discharged at high speed from the main body of the image forming apparatus maintains a high-speed productivity, and performs accurate alignment to produce a binding with high finishing quality. The structure becomes complicated and large.

The present invention solves the above-mentioned problems, improves a glue binding apparatus, and enhances the formation of a sheet bundle and the alignment and adhesion of a front cover and a back cover to improve the finish quality of book binding. It is another object of the present invention to provide a glue binding apparatus.

[0013]

The above object is achieved by the following method and apparatus of the present invention.

(1) A sheet is conveyed by a conveying means, a linear glue applying section is formed on the paper being conveyed by a glue discharging means, and the plurality of sheets on which the glue applying section is formed are stacked on a cover sheet. In the glue binding method of forming a booklet by folding and gluing the front surface side, the back surface side, and the back of the bundle of sheets with the cover paper to produce a booklet, the glue discharging means includes a first glue discharging means and a second glue discharging means. At least two sets of glue discharging means of the glue discharging means are arranged out of phase, and the first glue discharging means forms a linear first glue applying section along a paper side end during paper transport, and The second glue discharging means forms a linear second glue applying portion near a paper side end parallel to the first glue applying portion almost simultaneously with the glue discharging by the first glue discharging device. Glue binding method.

(2) A first glue discharging means for forming a linear first glue applying section along a paper side end during paper transport, and the first glue discharging means are arranged out of phase with the first glue discharging means, and At least two sets of glue discharging means of a second glue discharging means forming a linear second glue applying section near the paper side end parallel to the one glue applying section, and conveying the cover sheet and the paper; Conveying means for passing the positions of the first glue discharging means and the second glue discharging means, a paper placing table for placing the cover sheet and the paper subjected to the glue coating processing, the first glue applying section and the second glue applying section Aligning means for aligning the leading end portions of the sheets on which the sheets are formed to form a stacked sheet bundle, and a first folding means for folding the cover sheet placed on the sheet placing table at a right angle along the back of the sheet bundle. And a second folding means.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a glue binding apparatus according to the present invention,
An image forming apparatus provided with a glue binding apparatus will be described with reference to the drawings.

[One Embodiment of Image Forming Apparatus] FIG. 1 is an overall configuration diagram of an image forming system including an image forming apparatus main body A, an image reading apparatus B, and a glue binding apparatus C.

The main body A of the image forming apparatus comprises a charging means 2, an image exposure means (writing means) 3, a developing means 4, and a transfer means 5 around a rotating image carrier (hereinafter referred to as a photosensitive body) 1.
A, the charge removing means 5B, the separating claw 5C, and the cleaning means 6 are arranged, and the surface of the photoreceptor 1 is uniformly charged by the charging means 2 and thereafter, the image read from the original by the laser beam of the image exposing means 3 A latent image is formed by performing exposure scanning based on the data, and the latent image is reversely developed by the developing unit 4 to form a toner image on the surface of the photoconductor 1.

On the other hand, the transfer paper (hereinafter referred to as paper) S fed from the paper storage means 7A is sent to a transfer position.
At the transfer position, the toner image is transferred onto the sheet S by the transfer unit 5A. After that, the paper S is discharged by the discharging means 5B.
As a result, the charge on the back surface is erased, separated from the photoreceptor 1 by the separation claw 5C, conveyed by the intermediate conveyance unit 7B, subsequently heated and fixed by the fixing unit 8, and discharged by the paper discharge roller 7C.

When forming images on both sides of the sheet S,
The sheet S, which has been heated and fixed by the fixing unit 8, is branched from the normal sheet discharge path by the transfer path switching plate 7D, is switched back in the reverse transfer unit 7E, is turned over, and is discharged out of the apparatus by the sheet discharge roller 7C. Is done. Paper discharge roller 7
The sheet S discharged from C is sent to the receiving unit 11 of the glue binding apparatus C.

On the other hand, the developer remaining on the surface of the photoreceptor 1 after image processing is removed by the cleaning means 6 downstream of the separation claw 5C, and the surface is prepared for the next image formation.

An image reading device B provided with an automatic document feeder of a document moving type reading system is installed above the image forming device main body A.

[Gluing and Binding Apparatus] The paper transporting apparatus of the gluing and binding apparatus C includes a direct paper discharging means 10, a horizontal transporting means 20,
Direction changing conveyance means 30, paper storage section 40, discharge means 5
0, paper discharge means 60, front cover paper supply means 70A, and back cover paper supply means 70B. The glue applying device of the glue binding apparatus C includes a glue ejection unit 80A for the first surface of the paper S that forms the glue application unit on the first surface of the paper S, and a second paper glue that forms the glue application unit on the second surface of the paper S. Glue discharging means 80B for the surface, glue discharging means 80A for the first surface of the paper, and glue discharging device 80 for the second surface of the paper
A glue supply device 89 for supplying glue to B is provided.

FIG. 2 is a front sectional view of the glue binding apparatus C.

The sheet S introduced into the receiving unit 11 is selected by the switching plate 12 to either the upper direct sheet discharging unit 10 or the horizontal conveying unit 20.

The paper S introduced directly into the paper discharging means 10 is
The sheet is conveyed upward, is nipped by the conveying rollers 13 and 14, and is discharged onto the fixed sheet discharge tray 16 by the discharge roller 15.

When the shift mode or the non-sorted large-volume paper discharge mode is set, the switching plate 12 directly closes the transport path of the paper discharge means 10, opens the transport path of the horizontal transport means 20, and allows the paper S to pass. enable. The paper S introduced into the horizontal transport means 20 is transported by transport rollers 21, 22, 23, 24
The sheet S, which is nipped and conveyed and is not subjected to the glue coating process, is nipped by a discharge roller 61 via a shift means (not shown) and is discharged from a first discharge port 62 onto an elevating discharge tray 63 outside the machine. . For example, up to 3
It is possible to stack a large amount of 000 sheets S.

FIG. 3 is a sectional side view of the glue binding apparatus C, and FIG. 4 is a plan view. 5 and 6 are schematic perspective views of the glue binding apparatus.

When the mode is set to the mode of the glue binding process in which the sheet is orthogonally U-turned by the direction changing / conveying means 30,
The sheet S discharged from the image forming apparatus main body A is a motor M
The sheet is nipped and conveyed by conveying rollers 21 to 24 which are driven and rotated by 1. The leading end of the sheet S is the positioning member 2
When the sheet S comes into contact with the sheet 5, the skew of the sheet S is corrected, and the sheet S is positioned in the transport direction (the first transport path X1 in the direction of the arrow in FIGS. After that, the driving of the motor M1 is stopped, and the conveying rollers 21 to 21 are driven by a driving unit (not shown).
The upper rollers 24 are retracted upward from the sheet surface, and the pressure contact is released.

Further, the sheet S is nipped by the conveying rollers 31 and 32 driven and rotated by the motor M2, and is conveyed in the conveying direction deflected by 90 degrees (the second conveying in the direction of the arrow in FIGS. 3 to 6). Road Y1). The paper S continues to be transported by rollers 33,
The paper storage unit 40 is conveyed by U-turn while being sandwiched by
(Third transport path Z in the directions indicated by arrows in FIGS. 3 to 6).

(Glue Discharging Means) The glue discharging means is provided on the first surface of the sheet S, for forming at least two glue applying portions, for example, a first glue applying portion N1 and a second glue applying portion N2. It comprises a surface glue discharging means 80A and a second sheet glue discharging means 80B for forming a glue application portion N3 on the second surface of the sheet S.
The glue discharging means 80A for the first side of the paper has at least two pieces of the first glue discharging means 80A1 and the second glue discharging means 80A2.

A first glue discharging unit 80A1 and a second glue discharging unit 80A2, which constitute a glue discharging unit 80A for the first side of the sheet,
Since the glue discharging means 80B for the second surface of the paper has almost the same configuration, the configuration will be hereinafter referred to as glue discharging means 80.

FIG. 7 is a sectional view of the glue discharging means 80. The glue discharging means 80 includes a nozzle member 81 having an opening 81a for discharging glue, a movable needle member (hereinafter, referred to as a needle) 82 for opening and closing the opening 81a, and a needle 82.
And a solenoid SL for movably driving the needle 82.

The return spring 85 is provided in the housing 8 of the glue discharging means 80.
4 and the upper surface of the flange portion 82b, and presses the needle 82 downward. Solenoid S
When L is not operated, the distal end 82 a of the needle 82 closes the opening 81 a of the nozzle member 81 by the return spring 85.

When a voltage is applied to the solenoid SL, the plunger SLa is moved upward, the needle 82 directly connected to the plunger SLa is pulled up, and the opening 81a of the nozzle member 81 is opened to allow the paste to be discharged. Opening 8
The gap distance between the opening 1a and the tip portion 82a when opened is variable by the nozzle adjustment knob 86.

An inlet member 87 is fixed to the side surface of the casing 83, and the glue supplied from the glue supply device 89 described later is introduced into the glue accommodating chamber 83a through the supply pipe 88.

(Glue coating process on paper S) FIG. 8 shows a linear first glue coating portion N1 formed near the side edge of the paper S.
It is a top view which shows the 2nd paste application part N2. FIG. 9 is a perspective view showing a process of forming a glue application section Nx composed of a first glue application section N1 and a second glue application section N2 on a sheet S by the first glue ejection section 80A1 and the second glue ejection section 80A2. It is.

The glue discharging means 80A for the first side of the paper, which is composed of the first glue discharging means 80A1 and the second glue discharging means 80A2,
At least two sheets S are provided on one side edge of the sheet S traveling from the second conveyance path Y1 to the third conveyance path Z by the conveyance rollers 31 to 34.
A linear glue application section Nx is formed.

The first glue discharging means 80A1 forms a linear first glue application portion N1 along the paper side end. The second glue discharging means 80A2 forms a linear second glue applying portion N2 near the paper-side end parallel to the first glue applying portion N1. Linear first
The glue application section N1 and the second glue application section N2 firmly bond the papers over substantially the entire length near the side edge of the paper S, and produce a glued paper bundle Sa.

The paste used in the embodiment of the present invention is a water-soluble vinyl acetate resin emulsion paste, and has a viscosity of 750 to 1500 mPa · s at room temperature. The booklet bonded with the water-soluble glue can be reused as recycled paper.

(Loading, Alignment, and Pressing of Sheets S) (See FIGS. 3 and 5) The first sheet S that has not been subjected to the glue application processing is nipped and conveyed by the driven and rotated conveying rollers 33 and 34. The sheet is conveyed to the fourth conveyance path Y2 and is placed on the sheet table 41. The subsequent second and subsequent sheets S that have been subjected to the glue application processing are nipped and conveyed by the conveying rollers 33 and 34, conveyed to the fourth conveying path Y2, and stacked on the preceding sheet S on the sheet mounting table 41. .

That is, the leading end of the sheet S nipped and transported by the transport rollers 34 is gripped by gripping means (grippers) 43 held by a rotating endless belt 42, and the upper side of the sheet mounting table 41 is moved to the first position. The sheet is transported to the four transport path Y2. The pressing means 44 held by the moving gripping means 43 presses and moves the back side of the glue application section Nx forming surface of the preceding sheet bundle placed on the sheet placing table 41 to move and adhere the sheets. To ensure. The leading end of the sheet S gripped by the gripping means 43 contacts the leading edge stopper 45 and the leading edge is aligned. The leading end stopper 45 can be moved by a driving unit (not shown), and stops at a predetermined position according to the size setting of the sheet S. The rear end of the sheet S is movably driven by a sheet alignment pressing member 46.
As a result, the rear end of the sheet is aligned and the upper surface of the rear end of the sheet is pressed. Both end portions of the sheet S are positioned by the width matching means 47. The alignment and positioning of the leading end, the trailing end, and both sides of the sheet S are performed before the pressing process by the pressing unit 44. The pressing process of the sheet S by the pressing unit 44 includes:
It may be performed each time the second and subsequent sheets S are placed on the sheet placing table 41. Alternatively, the pressing process may be performed each time a plurality of sheets S are stacked.

Through the above steps, one booklet Sb that has been glued is completed. In the glue binding apparatus C, for example, a maximum of 200 sheets S can be glued and bound.

(Discharge) A plurality of discharge belts 53 wound around a driving roller 51 and a driven roller 52 are rotatably arranged on a part of the sheet stacking surface of the sheet mounting table 41.

The last sheet S is stacked on the sheet table 41, subjected to pressure processing, and glued and bound.
Is held by the discharge claw 53a of the discharge belt 53 rotated by the motor M3, the rear end of the booklet is slid, and slides on the mounting surface of the paper mounting table 41, and the second discharge of the discharge means 60 is performed. The sheet is nipped by a discharge roller 64 provided at the outlet 65 and discharged and stacked on the elevating sheet discharge table 63 (the fifth conveying path X in the direction of the arrow).
2). Prior to the sheet discharging process, the pressing unit 44 and the width aligning unit 47 are retracted above the transport path by a driving unit (not shown).

On the elevating discharge tray 63, a sheet S which has been discharged from the first discharge port 62 and which has not been subjected to the glue coating process, and a sheet bundle Sa which has been discharged from the second discharge port 65 and have been subjected to the glue coating process are stacked. It is possible to accommodate a large amount of sheets S and a bundle of sheets Sa by driving up and down.

[Cover Cover Binding Making Mechanism] The glue binding apparatus C of the present invention glues and binds sheets between sheets, and glues and binds the front and back covers to the front and back surfaces of the sheet bundle Sa. And a case binding production mechanism.

As shown in FIG. 6, the cover case binding producing mechanism includes a crease roller 91, a glue discharging means 80B for the second surface of the sheet, a cover sheet feeding means 70A, and a back cover sheet feeding means 70.
B is provided.

The creasing roller 91 is connected to the second conveying path Y1.
Cover (cover sheet) K provided and transported downstream of
a with a first fold a and bent into a loose V-shape,
A cover surface portion b having the same size as the sheet S and a spine portion c are formed.

The glue discharging means 80B for the second side of the paper has substantially the same structure as the glue discharging means 80A for the first side of the paper.
The glue discharging means 80B for the second surface of the sheet is provided with the first glue discharging means 8B.
0A1, below the second glue discharging means 80A2, on the upstream side of the fourth transport path Y2, and glue the paper near the side edge of the upper surface (back side) of the final paper Sn forming the paper bundle Sa during paper transport. The cloth portion N3 is formed (see FIG. 16). Therefore, near the side edge of the final sheet Sn, the glue application section Nx on the sheet surface side by the first glue discharging means 80A1 and the second glue discharging means 80A2.
Then, a glue application section N3 on the back side of the paper is formed by the glue discharging means 80B for the second surface of the paper.

The upper cover sheet feeding means 70A shown in FIG.
Is composed of a paper feed cassette 71A for storing the front cover Ka and a paper feed unit 72A. One cover sheet Ka fed from the sheet feeding cassette 71A by the sheet feeding unit 72A passes through the conveying rollers 73 and 74, passes through the horizontal conveying unit 20, the direction changing conveying unit 30, and is folded by the creasing roller 91. The sheet is fed into the paper storage section 40 with a fold a.

The lower back cover paper feeding means 70B shown in FIG.
Is a paper feed cassette 7 for storing the back cover (cover paper) Kb.
1B and a paper feeding section 72B. Paper feed section 72B
A single back cover Kb fed from the paper feed cassette 71B passes through the conveying rollers 73 and 74, is sent to the horizontal conveying means 20, and is sent to the paper storage section 40 via the direction changing conveying means 30. Are glued and bound on the upper surface of the sheet bundle Sa.

FIG. 10 is a perspective view showing a step of gluing the front cover Ka and the back cover Kb to the sheet bundle Sa and performing case binding. 11 to 15 are perspective views showing the details of the glue case binding production process by the glue binding device. FIG.
16A is a partially enlarged cross-sectional view illustrating a stacked state of the sheets S, and FIG. 16B is a partially enlarged cross-sectional view illustrating the state of bonding between the sheet bundle and the front cover Ka and the back cover Kb.

Hereinafter, the cover case binding production process will be described. (1) FIG. 11 is a perspective view showing a first folding step of the cover Ka, a reverse transporting step, and a transporting step on the paper mounting table 41.

The cover Ka, which is transported in the direction of the second transport path Y1 by the transport roller 32, is attached to the pair of creasing rollers 9
1, a first fold a is formed and bent into a loose V-shape to form a front cover part b and a spine part c having the same size as the paper S. The folded front cover Ka is the third cover.
The sheet is sent in the direction of the transport path Z, and further sent in the direction of the fourth transport path Y2 (see FIGS. 11A and 11B).

The folded front cover Ka is reversely conveyed along the third conveyance path Z and the fourth conveyance path Y2, and the spine portion c
Is conveyed onto the paper placing table 41 with the upper side facing upward, and the width direction is regulated by the paper alignment pressing means 46.
5 (see FIGS. 11 (c) and 10 (1)).

(2) FIG. 12 is a perspective view showing a first right-angle folding step of the cover Ka and a sheet transporting step.

The back folding support plate 92 supported at the retracted position above the paper placing table 41 shown in FIG.
Cover surface portion b of cover Ka placed on paper placing table 41
In the vicinity of the first fold a is vertically pressed and supported. Next, the first supporting member 41 supported at the retracted position below the
The folding means 93 rises close to the back side of the spine folding support plate 92 and presses the spine portion c to bend the loosely bent spine portion c substantially at right angles along the first fold a. (See FIG. 12 (a) and FIG. 10 (2)).

(3) After bending the cover Ka at right angles,
The spine folding support plate 92 rises and stops at the retracted position. At substantially the same time, the sheet aligning and pressing member 46 also retracts from the aligning position, enabling the subsequent sheet S to be received. The subsequent sheet S on which the glue application section Nx has been formed passes through the same transport path as the front cover Ka, and is transported to the paper storage section 40 with the glue application section Nx on the lower side. The leading end of the sheet S comes into contact with the leading end stopper 45 and stops, and the sheet S is placed on the upper surface of the cover surface b of the cover Ka. The paper alignment pressing member 46 is configured such that the paper S
Each time the sheet S is placed on the upper surface of the sheet S, the sheet S moves in a direction perpendicular to the sheet conveying direction, and presses the side edge of the sheet S to cover the front cover Ka
The width of the paper S is aligned by abutting against the spine portion c (see FIGS. 12B and 10C).

(4) FIG. 13 is a perspective view showing a pressing step of the sheet bundle Sa and a second right-angle folding step of the cover Ka. The subsequent second and subsequent sheets S that have been subjected to the glue application processing are stacked on the preceding sheet S on the sheet mounting table 41 and are aligned in the sheet width direction by the sheet alignment pressing member 46. The pressurizing means 44 which moves down and presses the back side of the glue application section N of the paper S sequentially to form a paper bundle Sa (FIG. 13A,
FIG. 10 (4)).

The pressing processing of the sheet S by the pressing means 44
It may be performed each time the second and subsequent sheets S are placed on the sheet placing table 41. Alternatively, the pressing process may be performed each time a plurality of sheets S are stacked.

By the pressing of the sheet bundle Sa by the pressing means 44, the glue application portion N1 of the sheet S is rolled, protrudes from the end of the sheet, and is joined to the inside of the back of the front cover Ka.

The paper S on which the glue application portion Nx is formed is stacked on the front cover Ka or the paper S, and when the paper S is aligned in the paper width direction, the glued side end of the paper S and the spine portion of the cover Ka. c is adhered, and the cover Ka and the sheet S and the sheet are adhered by the glue application section Nx.

(5) In FIG. 16, near the side edge of the final sheet Sn, the first and second glue discharging units 80A1 and 80A2 of the glue discharging unit 80A for the first side of the paper are on the front side of the sheet. After the glue application portion Nx and the glue application portion N3 on the back side of the paper by the glue discharge means 80B for the second surface of the paper are formed, they are stacked on the preceding paper S, and when the paper is aligned in the paper width direction, the final paper Sn And the front cover Ka
Of the back cover Ka, the sheet S, and the sheet are adhered by the glue application section Nx.

After the alignment, bonding, and pressing of the sheet Sn-1 immediately before the last sheet Sn are completed, the pressing unit 44 does not press the last sheet Sn and retreats upward. After the final sheet Sn is placed on the sheet bundle Sa and bonded,
The folding means 93 descends, and its leading end descends to the uppermost position of the sheet bundle Sa and stops (FIG. 13B, FIG. 1).
0 (5)).

(6) The second folding means 94 is advanced in the horizontal direction by the driving means to form a second fold d on the front cover Ka, which is bent at a right angle to form a folded portion. (See FIG. 13 (c) and FIG. 10 (6)).

(7) FIG. 14 is a perspective view showing a step of pressing the sheet bundle Sa and a step of transporting the back cover Kb. The second folding means 94 retracts and retracts to the initial position, the back folding support plate 92 descends, presses the upper surface of the folded portion of the cover Ka, and bonds the folded portion to the glue application portion N3 of the final sheet Sn. (See FIGS. 14 (a) and 10 (7)).

(8) FIG. 15 is a perspective view showing the aligning step, the pressing step, and the discharging step of the back cover Kb.

The back cover Kb is conveyed in the same manner as the sheet S,
The glue application portion Nx applied only by the second glue discharging means 80A2
Of the back cover Kb is pressed by the sheet alignment pressing member 46 to perform width alignment, and the uppermost layer of the sheet bundle Sa and the folded portion of the cover Ka are pressed. 14 (b), FIG. 15 (a), FIG.
0 (8)).

(9) The upper surface of the joint surface between the folded portion of the front cover Ka and the back cover Kb is pressed by the pressing means 44 to crush and spread the glue, thereby strengthening the adhesion to the spine portion c. (FIG. 15 (b), FIG. 10 (9), FIG. 16 (b)
reference).

(10) The first folding means 93 is lowered and retracted to the initial position below. The booklet Sb on which the glue binding is performed is held on the trailing end of the booklet by the discharge claw 53a of the rotating discharge belt 53, and is discharged onto the elevating discharge table 63.
The sheets are stacked (fifth transport path X2 in the direction indicated by the arrow). (FIG. 15
(C), see FIG. 10 (10)).

FIG. 17 shows a booklet S produced by bookbinding.
FIG. 17A is a perspective view of FIG. 17A, and FIG. 17A shows the finish of a booklet Sb produced by cover-case binding, and FIG.
This shows a state in which the back cover is opened halfway.

It is also possible to form the glue binding apparatus C of the present invention in an independent device and to produce glue binding for paper processed by another image forming apparatus.

[0074]

As is clear from the above description, the glue binding method and the glue binding apparatus of the present invention provide a linear first glue applying section along the paper side end for each sheet conveyed. By forming a linear second glue applying portion near the paper side end parallel to the first glue applying portion, the adhesion between the papers and the adhesion between the paper, the front cover and the back cover are strengthened, Since the adhesive strength at the back of the booklet is improved, even when the booklet is opened and the throat is strongly pressed, the adhesion between the sheets and between the sheet and the front cover and the back cover is not damaged.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of an image forming system including an image forming apparatus main body, an image reading device, and a glue binding device.

FIG. 2 is a front sectional view of the glue binding apparatus.

FIG. 3 is a side sectional view of the glue binding apparatus.

FIG. 4 is a plan view of the glue binding apparatus.

FIG. 5 is a schematic perspective view of a glue binding apparatus.

FIG. 6 is a schematic perspective view of a glue binding apparatus.

FIG. 7 is a sectional view of the glue discharging means.

FIG. 8 is a plan view showing two linear glue application sections formed near the side edges of the sheet.

FIG. 9 is a perspective view showing a step of forming a glue application section on a sheet by a first glue discharging unit and a second glue discharging unit.

FIG. 10 is a perspective view showing a step of gluing a front cover and a back cover to a sheet bundle and performing case binding;

FIG. 11 is a perspective view showing a first folding step of the cover, a reverse transporting step, and a transporting step on the paper mounting table.

FIG. 12 is a perspective view showing a first right-angle folding step of the cover and a sheet conveying step.

FIG. 13 is a perspective view showing a pressing step of the sheet bundle and a second right-angle folding step of the cover.

FIG. 14 is a perspective view showing a step of pressing a sheet bundle and a step of conveying a back cover.

FIG. 15 is a perspective view showing a back cover aligning step, a pressing step, and a sheet discharging step.

FIG. 16 is a partially enlarged cross-sectional view illustrating a stacked state of sheets and a bonded state of a sheet bundle, a front cover, and a back cover.

FIG. 17 is a perspective view of a booklet produced by bookbinding.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 20 Horizontal conveyance means 30 Direction change conveyance means 40 Paper storage part 41 Paper mounting table 44 Pressurization means 46 Paper alignment pressing member 70A Front cover paper supply means 70B Back cover paper supply means 80A Adhesive discharge means for the first surface of paper 80A1 First 1 glue discharging means 80A2 2nd glue discharging means 80B glue discharging means for the second surface of paper 91 creasing roller 92 back folding support plate 93 1st bending means 94 2nd bending means A image forming apparatus main body C glue binding apparatus Ka table Cover (cover sheet) N1 First glue applying part N2 Second glue applying part N3, Nx Glue applying part S Transfer paper (paper) Sa Paper bundle

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Katsunori Takahashi 2970 Ishikawacho, Hachioji-shi, Tokyo Konica Corporation (72) Inventor Takenobu Kimura 2970 Ishikawacho, Hachioji-shi, Tokyo Konica Corporation (72) Invention Person Toshitaka Matsumoto 3-51-4 Kanamecho, Toshima-ku, Tokyo F-term (reference) 3F108 GA02 GA03 GA04 GB01 HA02 HA13

Claims (5)

[Claims] 1. A sheet is conveyed by a conveying means, a linear glue applying section is formed on the paper being conveyed by a glue discharging means, and a plurality of sheets on which the glue applying section is formed are stacked on a cover sheet. In a glue binding method for gluing and folding and gluing a front side, a back side and a back side of a sheet bundle with a cover sheet to produce a booklet, the glue discharging unit includes a first glue discharging unit and a second glue. At least two sets of glue discharging means of the discharging means are arranged out of phase with each other, and the first glue discharging means forms a linear first glue applying portion along a paper side end during paper transport, and The second glue discharging means forms a linear second glue applying portion near the paper side end parallel to the first glue applying portion almost simultaneously with the glue discharging by the first glue discharging device. Gluing and binding method. 2. A first glue discharging means for forming a linear first glue applying portion along a paper-side end portion during paper transport, and the first glue discharging means is arranged out of phase with the first glue discharging means. At least two sets of glue discharging means of a second glue discharging means forming a linear second glue applying section near a paper side end parallel to the glue applying section, and conveying the cover sheet and the paper; A conveying unit that passes through the positions where the glue discharging unit and the second glue discharging unit are arranged; a paper placing table on which the cover sheet and the paper that has been subjected to the glue coating process are placed; and the first glue applying unit and the second glue applying unit. Aligning means for aligning the leading ends of the formed sheets to form a stacked sheet bundle, and first folding means for folding a cover sheet placed on the sheet placing table at a right angle along the back of the sheet bundle And a second folding means. 3. The cover sheet that wraps and adheres the sheet bundle includes a front cover that adheres a front side of the sheet bundle and a back cover that adheres a back side of the sheet bundle. 3. The glue binding apparatus according to claim 2, wherein: 4. The front cover has a size that wraps around the front side, back and part of the back cover side of the sheet bundle, and the back cover has the same size as the sheet bundle. The glue binding apparatus according to claim 2 or 3. 5. Each sheet of a sheet bundle to be stacked on the sheet mounting table is stacked on the cover with the linear glue application section facing downward, and the final paper is formed by a linear glue application section. The glue binding apparatus according to any one of claims 2 to 4, wherein the glue binding apparatus is formed and stacked on both surfaces of the apparatus.