JP2022025262A - Bookbinding device - Google Patents

Abstract

To properly shape a booklet by case binding even when the number of sheets in a paper bundle is low.SOLUTION: A bookbinding device includes: an adhesive applying unit 45 for applying an adhesive on a back face and a part of a side surface of a paper bundle PS composed of a plurality of text sheets; a paper bundle thickness sensor 79 for acquiring a thickness of the paper bundle PS; a center folding roller 99 which rotates while sandwiching the paper bundle and a cover sheet so as to wrap the back face and the side surface of the paper bundle to which adhesive has been applied by the adhesive applying unit 45 with the cover sheet; and a bookbinding control unit 50 for rotating the center folding roller 99 so as to sandwich the paper bundle and the cover sheet when the thickness acquired by the paper bundle thickness sensor 79 is less than a prescribed threshold value.SELECTED DRAWING: Figure 3

Description

The present invention relates to a bookbinding apparatus that appropriately forms a booklet by wrapping even when the number of paper bundles is small.

Conventionally, a bookbinding device for producing a booklet by a case binding function has been known. The case binding function is a function of applying an adhesive to the back surface of a paper bundle composed of a plurality of printed text papers, and wrapping and binding the paper bundle with a cover paper to produce a booklet.

A bookbinding device that produces a booklet using the case binding function bends the cover paper by pressing the bundle of paper against the cover paper from above, and the boundary portion between the spine cover portion and the front cover portion of the cover paper, and the spine cover portion. A booklet is completed by folding each boundary portion with the back cover portion (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2016-37030

However, in the technique described in Patent Document 1, the folded booklet is completed by pressing the bundle of paper against the cover paper from above. Therefore, when the number of sheets of the paper bundle is small, the rigidity of the paper bundle is low, so that it is difficult to bend the cover paper, and the tip of the paper bundle may be crushed.

The present invention has been made in view of the above, and an object of the present invention is to provide a bookbinding apparatus for appropriately forming a booklet by wrapping even when the number of paper bundles is small.

In order to achieve the above object, the bookbinding apparatus according to the present invention is
An adhesive application means for applying an adhesive to the back surface and a part of the side surface of a paper bundle composed of a plurality of body sheets, and an adhesive application means.
An acquisition means for acquiring the thickness of the bundle of paper, and
A center-folding roller that rotates while sandwiching the paper bundle and the cover paper so that the back surface and the side surface of the paper bundle applied by the adhesive application means are wrapped with the cover paper.
When the thickness acquired by the acquisition means is less than a predetermined threshold value, the control means for rotating the middle folding roller so as to sandwich the paper bundle and the cover paper.
It is to have.

According to the first feature of the bookbinding apparatus according to the present invention, it is possible to appropriately form a booklet by wrapped bookbinding even when the number of sheets of paper bundles is small.

It is a schematic block diagram of the bookbinding system which concerns on this embodiment. It is a functional block diagram of the bookbinding apparatus of the bookbinding system which concerns on this embodiment. It is a figure explaining the operation of the center folding roller provided in the bookbinding apparatus of the bookbinding system which concerns on this embodiment. It is explanatory drawing which schematically explained the operation of the bookbinding apparatus of the bookbinding system which concerns on this embodiment. It is explanatory drawing which schematically explained the operation of the bookbinding apparatus of the bookbinding system which concerns on this embodiment. It is explanatory drawing which schematically explained the operation of the bookbinding apparatus of the bookbinding system which concerns on this embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same or equivalent parts and components are designated by the same or equivalent reference numerals throughout the drawings. However, it should be noted that the drawings are schematic and may differ from the actual ones. In addition, there are parts where the relationships and ratios of the dimensions of the drawings are different from each other.

Further, the embodiments shown below exemplify an apparatus or the like for embodying the technical idea of the present invention, and the technical idea of the present invention describes the arrangement of each component and the like as follows. It is not specific to. The technical idea of the present invention can be modified in various ways within the scope of claims.

FIG. 1 is a schematic configuration diagram of a bookbinding system according to the present embodiment, and is a functional configuration diagram of a bookbinding device of the bookbinding system according to the present embodiment.

As shown in FIG. 1, the bookbinding system 1 according to the present embodiment includes a printing device 2 and a bookbinding device 3.

Based on the job, the printing device 2 performs necessary printing on the paper P constituting the booklet B, that is, the text paper P1 constituting the paper bundle PS and the cover paper P2 wrapping the paper bundle PS. The printing device 2 stores or holds a paper feeding unit 11, a printing unit 12, a communication unit 13, a top surface transport unit 14, a paper ejection unit 15, a reversing unit 16, a print control unit 17, and each unit. A housing 18 is provided.

The path shown by the thick line in FIG. 1 is the transfer path through which the paper is conveyed. Of the transport routes in the printing apparatus 2, the route indicated by the solid line is the normal route RC, the route indicated by the alternate long and short dash line is the inverted route RR, the route indicated by the long dashed line is the paper ejection route RD, and the route indicated by the short dashed line is the communication route RJ. The path indicated by the dotted line is the paper feed path RS. In the following description, upstream and downstream mean upstream and downstream in the transport path.

The paper feed unit 11 feeds paper to the print unit 12. The paper feed unit 11 is arranged on the most upstream side of the transport path. The paper feed unit 11 includes an external paper feed tray 21, an external paper feed roller 22, a plurality of internal paper feed trays 23, a plurality of pairs of internal paper feed rollers 24, and a plurality of pairs of internal paper feed transfer rollers 25. Be prepared. Here, the external paper feed tray 21 and the internal paper feed tray 23 are collectively referred to as a paper feed tray.

The external paper feed tray 21 is loaded with the paper P used for printing. A part of the external paper feed tray 21 is installed so as to be exposed to the outside of the housing 18.

The external paper feed roller 22 takes out the paper P one by one from the external paper feed table 21 and conveys the paper P along the paper feed path RS toward the resist roller 26 described later. The external paper feed roller 22 is arranged above the external paper feed table 21. The external paper feed roller 22 is driven by a motor (not shown).

The internal paper feed tray 23 is loaded with the paper P used for printing. The internal paper feed tray 23 is arranged inside the housing 18.

The internal paper feed roller 24 takes out the paper P from the internal paper feed tray 23 one by one and feeds them to the paper feed path RS. The internal paper feed roller 24 is arranged above the internal paper feed table 23. The internal paper feed roller 24 is driven by a motor (not shown).

The internal paper feed transfer roller 25 conveys the paper P taken out from the internal paper feed table 23 toward the resist roller 26. The internal paper feed transfer roller 25 is arranged along the paper feed path RS. The internal paper feed transfer roller 25 is driven by a motor (not shown).

The printing unit 12 prints an image on the paper P while transporting the paper P. The printing unit 12 is arranged on the downstream side of the paper feeding unit 11. The printing unit 12 includes a resist roller 26, a belt transport unit 27, and an inkjet head unit 28.

The resist roller 26 temporarily stops the paper P conveyed from the paper feeding unit 11 or the reversing unit 16, and then conveys the paper P toward the belt conveying unit 27. The resist roller 26 is arranged on the normal path RC near the confluence of the paper feed path RS and the inversion path RR. The resist roller 26 is driven by a motor (not shown).

The belt transport unit 27 sucks and holds the paper P conveyed from the resist roller 26 on the belt and conveys it. The belt transport unit 27 is arranged on the downstream side of the resist roller 26. The belt transport unit 27 is driven by a motor (not shown).

The inkjet head unit 28 has a plurality of line-type inkjet heads (not shown) in which a plurality of nozzles are arranged in a direction (front-back direction) substantially orthogonal to the transport direction of the paper P. The inkjet head portion 28 is arranged above the belt transport portion 27. The inkjet head unit 28 ejects ink from the inkjet head onto the paper P conveyed by the belt transport unit 27 to print an image.

The contact unit 13 sends the printed paper P to the bookbinding device 3 at the time of printing for bookbinding. The communication unit 13 includes a switching unit 29 and a communication roller 30.

The switching unit 29 switches the transport route of the paper P between the normal route RC and the communication route RJ. The switching unit 29 is arranged at a branch point between the normal route RC and the communication route RJ. The switching unit 29 is driven by a solenoid (not shown). The communication path RJ is a path extending from the boundary between the printing unit 12 and the upper surface conveying unit 14 toward the bookbinding device 3. The downstream end of the communication path RJ is connected to the upstream end of the text path RH of the bookbinding device 3 described later.

The contact roller 30 conveys the paper P conveyed from the belt conveying unit 27 and sends it out to the bookbinding device 3. The communication roller 30 is arranged on the downstream side of the switching unit 29 along the communication path RJ. The connecting roller 30 is driven by a motor (not shown).

The upper surface transport unit 14 transports the paper P conveyed by the belt transport unit 27 so as to make a U-turn from the right direction to the left direction. The top surface transport unit 14 includes a plurality of pairs of top surface transport rollers 31.

The top surface transport roller 31 transports the paper P while niping it. The most downstream upper surface transport roller 31 is arranged in the upstream portion of the reversal path RR. The other top surface transport roller 31 is arranged along the normal path RC between the printing unit 12 and the paper ejection unit 15. The top surface transfer roller 31 is driven by a motor (not shown).

The paper ejection unit 15 ejects the printed paper P. The paper ejection unit 15 includes a switching unit 32, a paper ejection roller 33, and a paper ejection table 34.

The switching unit 32 switches the transport path of the paper P between the paper discharge path RD and the reverse path RR. The switching unit 32 is arranged at a branch point between the paper ejection path RD and the inversion path RR. The switching unit 32 is driven by a solenoid (not shown).

The paper ejection roller 33 conveys the paper P conveyed by the upper surface conveying unit 14, and ejects the paper to the paper ejection table 34. The paper ejection roller 33 is arranged between the switching unit 32 and the paper ejection table 34 along the paper ejection path RD. The paper ejection roller 33 is driven by a motor (not shown).

The paper ejection table 34 is for loading the ejected paper P. The paper ejection table 34 is arranged at the downstream end of the paper ejection path RD.

At the time of double-sided printing, the reversing unit 16 reverses the single-sided printed paper P and conveys it to the resist roller 26. The reversing unit 16 includes a reversing roller 35, a re-feeding roller 36, and a switching gate 37.

The reversing roller 35 switches back the paper P conveyed by the upper surface conveying unit 14 and conveys it to the re-feeding roller 36. The reversing roller 35 is arranged between the most downstream upper surface transport roller 31 and the refeeding roller 36 along the reversing path RR. The reversing roller 35 is driven by a motor (not shown).

The re-feeding roller 36 conveys the paper P conveyed by the reversing roller 35 to the resist roller 26. The re-feeding roller 36 is arranged on the reversing path RR between the reversing roller 35 and the resist roller 26. The re-feed roller 36 is driven by a motor (not shown).

The switching gate 37 guides the paper P conveyed by the upper surface transfer roller 31 to the reversing roller 35. Further, the switching gate 37 guides the paper P switched back by the reversing roller 35 to the re-feeding roller 36. The switching gate 37 is arranged near the center of gravity of the uppermost transport roller 31, the reversing roller 35, and the re-feeding roller 36 on the most downstream side.

The print control unit 17 controls the operation of each unit of the printing device 2. The print control unit 17 includes a CPU, RAM, ROM, a hard disk, and the like.

The details of the functions and operations will be described later, but the print control unit 17 has a function of selecting a paper feed tray in which the cover paper P2 is stored in cooperation with the bookbinding control unit 50 described later.

The bookbinding device 3 produces a booklet B by the case binding function. The case binding function is a function of creating a paper bundle PS composed of a plurality of sheets of text paper P1 and wrapping and binding the paper bundle PS with the cover paper P2 to form a booklet B. The bookbinding device 3 includes a text transport section 41, a cover transport section 42, a matching section 43, a clamp section 44, an adhesive application section 45, a molding section 46, a cutting section 47, a guide section 48, and discharge. A unit 49, a bookbinding control unit 50, and a housing 51 for accommodating or holding each unit are provided.

Of the transport routes in the bookbinding device 3, the route indicated by the solid line is the text route RH, and the route indicated by the alternate long and short dash line is the cover page route RF.

The text transfer unit 41 conveys the printed text paper P1 sent out from the printing device 2 to the matching unit 43. The text transfer unit 41 includes a plurality of pairs of text transfer rollers 56 and a text transfer motor 57.

The text transfer roller 56 conveys the text paper P1 sent out from the printing device 2 while niping it. The text transfer roller 56 is arranged along the text path RH. The upstream end of the text path RH is connected to the downstream end of the communication path RJ of the printing device 2.

The text transfer motor 57 rotates and drives a plurality of pairs of text transfer rollers 56.

The cover sheet transport section 42 transports the printed cover sheet P2 sent out from the printing device 2 to the molding section 46. The cover transfer unit 42 includes a switching unit 61, a solenoid 62, a cover transfer roller 63, and a cover transfer motor 64.

The switching unit 61 switches the transport path of the paper P (text paper P1 and cover paper P2) between the text path RH and the cover path RF. The switching unit 61 is arranged at a branch point between the text path RH and the cover path RF.

The solenoid 62 drives the switching unit 61.

The cover transfer roller 63 conveys the cover paper P2 sent out from the printing device 2 while niping it. The cover transfer roller 63 is arranged upstream of the cover path RF.

The cover transfer motor 64 rotates and drives the cover transfer roller 63.

The matching unit 43 functions as a paper bundle creating unit that aligns a plurality of printed body sheets P1 to create a sheet bundle composed of the plurality of body sheets P1. The matching portion 43 includes a matching tray 66, a front end fence motor 67, a rear end fence motor 68, and a side fence motor 69.

The matching tray 66 is loaded with the text paper P1. A front end fence 71, a rear end fence 72, and a pair of side fences 73 are erected on the matching tray 66. The tip fence 71 regulates the position of the text paper P1 on the tip side in the transport direction. The rear end fence 72 regulates the position of the rear end side of the text paper P1 in the transport direction. The pair of side fences 73 regulate the positions of the text paper P1 in the direction orthogonal to the transport direction (front-back direction). The front end fence 71 and the rear end fence 72 are configured to be movable in parallel with the paper transport direction. The pair of side fences 73 are configured to be movable so as to approach and separate from each other in the front-rear direction.

The tip fence motor 67 moves the tip fence 71. The rear end fence motor 68 moves the rear end fence 72. The side fence motor 69 moves the side fence 73.

The clamp portion 44 clamps the paper bundle PS composed of a plurality of body papers P1 loaded on the matching tray 66, and moves the clamped paper bundle PS. The clamp portion 44 includes a pair of clamp plates 76, a clamp plate opening / closing motor 77, a clamp plate moving motor 78, and a paper bundle thickness sensor 79.

The pair of clamp plates 76 clamp (clamp) the paper bundle PS loaded on the matching tray 66. The pair of clamp plates 76 are clamped and unclamped by opening and closing. The pair of clamp plates 76 move the clamped paper bundle PS to the adhesive application portion 45, the molding portion 46, and the like.

The clamp plate opening / closing motor 77 opens / closes a pair of clamp plates 76.

The clamp plate moving motor 78 moves a pair of clamp plates 76. As a result, the pair of clamp plates 76 can be moved to the adhesive coating portion 45, the molding portion 46, and the like.

The paper bundle thickness sensor 79 measures the thickness of the paper bundle PS. The paper bundle thickness sensor 79 is installed on the clamp plate 76. When the pair of clamp plates 76 clamps the paper bundle PS, the paper bundle thickness sensor 79 measures the thickness of the paper bundle PS based on the moving distance of the clamp plates 76.

The adhesive application portion 45 applies the hot melt adhesive to the end face PSa on the back side of the paper bundle PS. The adhesive coating portion 45 is arranged on the right side of the molding portion 46. The adhesive coating unit 45 includes an adhesive accommodating unit 81, a coating roller 82, and a coating roller motor 83.

The adhesive accommodating portion 81 accommodates the hot melt adhesive G. The hot melt adhesive G adheres the paper bundle PS and the cover paper P2.

The coating roller 82 adheres the hot melt adhesive G contained in the adhesive accommodating portion 81 to the outer peripheral surface. When the paper bundle PS comes into contact with the coating roller 82, the hot melt adhesive G adhering to the outer peripheral surface of the coating roller 82 adheres to the paper bundle PS.

The coating roller motor 83 rotates the coating roller 82. As a result, the coating roller 82 can be rotated in the hot melt adhesive G stored in the adhesive accommodating portion 81, and the hot melt adhesive G is adhered to the outer peripheral surface of the coating roller 82 to adhere the hot melt adhesive G to the adhesive accommodating portion. The hot melt adhesive G can be applied to the end surface PSa on the back side of the paper bundle PS that has been pumped up from 81 and exposed and brought into contact with the outer peripheral surface.

The molding unit 46 wraps and binds the paper bundle PS with the cover paper P2 of the standard paper to form the booklet B. Here, the molding unit 46 aligns the edge of the front portion of the cover paper P2 with the edge of the surface of the paper bundle PS, and wraps the paper bundle PS with the cover paper P2 to form the surface and spine of the paper bundle PS. The entire surface of the end face on the side can be covered with the cover paper P2. This case binding will be described later. The molding portion 46 is arranged below the matching tray 66.

The molding unit 46 includes a cover carry-in roller 86, a cover carry-in motor 87, an encoder 88, a paper sensor 89, a pair of back folding plates 90, a back folding plate motor 91, a butt plate 92, and a center folding motor. It includes 98 and a center-folding roller 99.

The cover carry-in roller 86 conveys the cover paper P2 conveyed by the cover transfer roller 63 of the cover transfer unit 42 while niping the cover paper P2, and arranges the cover paper P2 on the pair of back folding plates 90. The cover carry-in roller 86 is arranged on the downstream side of the cover carry-in roller 63 and in the vicinity of the upstream side of the pair of back folding plates 90. The cover paper carry-in roller 86 is configured to be able to release the nip of the cover paper P2.

The cover carry-in motor 87 rotates and drives the cover carry-in roller 86.

The encoder 88 detects the rotation angle of the rotation axis of the cover carry-in motor 87, and generates a pulse signal according to the rotation angle.

The paper sensor 89 detects the cover paper P2 carried along the cover path RF. The paper sensor 89 is arranged between the cover transfer roller 63 and the cover carry-in roller 86.

The pair of spine folding plates 90 are for bending the boundary portion between the spine cover and the front cover and the boundary portion between the spine cover and the back cover of the front cover paper P2. The pair of back folding plates 90 are configured to be movable in the left-right direction so as to approach and separate from each other. The back folding plate 90 is arranged on the abutting plate 92.

In the abutting plate 92, the end surface PSa on the back side of the paper bundle PS is abutted via the cover paper P2.

The back folding plate motor 91 operates a pair of back folding plates 90.

The center fold roller 99 is for bending the boundary portion between the spine and the front cover of the front cover sheet P2 and the boundary portion between the spine cover and the back cover.

FIG. 3 is a diagram illustrating the operation of the center folding roller 99.

As shown in FIG. 3A, the pair of clamp plates 76 move downward with the paper bundle PS clamped, so that the lower end of the paper bundle PS abuts on the cover paper P2.

Then, as shown in FIG. 3B, the center folding roller 99 bites the paper bundle PS and the cover paper P2 while moving further downward. By rotating the center folding roller 99, the paper bundle PS and the cover paper P2 are sandwiched so that the back surface and the side surface of the paper bundle PS coated by the adhesive coating portion 45 are wrapped by the cover paper P2.

The center-folding motor 98 rotates the center-folding roller 99.

The cutting portion 47 can cut the cover paper P2 if necessary. The cut portion 47 is arranged at the lower right of the molding portion 46. The cutting portion 47 is a waste that receives a cut piece of the cover paper P2 cut by the rotary cutter unit 96 and the rotary cutter unit 96 that cuts the surplus cover paper protruding from the end edge of the paper bundle created by the molding portion 46. It is equipped with a paper case 97.

The cutting portion 47 wraps the paper bundle PS with the cover paper, and cuts and removes the surplus cover paper protruding from the end edge of the paper bundle PS, if necessary.

The guide portion 48 guides the end portion of the cover paper P2 to be cut of the booklet B, which is conveyed to the cutting portion 47 side by the booklet transfer conveyor 111 described later, toward the rotary cutter unit 96. The guide portion 48 is arranged adjacent to the left side of the cutting portion 47. The guide portion 48 includes a guide plate 106, a guide block 107, and a guide block motor 108. The guide block motor 108 moves the guide block 107 in the vertical direction.

The discharge unit 49 discharges the completed booklet B to the outside of the housing 51. The discharge unit 49 is arranged at the lower part of the bookbinding device 3. The discharge unit 49 includes a booklet transfer conveyor 111, a booklet discharge conveyor 112, and a receiving stand 113.

The booklet transfer conveyor 111 receives the booklet B formed by the forming unit 46, and in the case of normal bookbinding work, conveys the booklet B to the cutting unit 47. When the cutting of the cover paper P2 by the cutting portion 47 is completed, the booklet transport conveyor 111 transports the completed booklet B to the left and drops it onto the booklet discharge conveyor 112.

The booklet conveyor 111 includes a pair of pulleys 116, a conveyor belt 117, and a booklet conveyor motor 118.

A pair of pulleys 116 are hung with a transport belt 117 to rotate the transport belt 117.

The transport belt 117 is an annular belt that is hung on a pair of pulleys 116. The transport belt 117 transports the booklet B by moving endlessly by the rotation of the pulley 116.

The booklet transfer motor 118 rotationally drives one of the pair of pulleys 116. The other pulley 116 is driven by the one pulley 116 via the transport belt 117.

The booklet discharge conveyor 112 receives the booklet B from the booklet transport conveyor 111, transports it to the right, and discharges it to the receiving stand 113. The booklet discharge conveyor 112 is arranged below the booklet transfer conveyor 111. The booklet discharge conveyor 112 is longer in the left-right direction than the booklet transfer conveyor 111, and extends substantially in the left-right direction of the housing 51. The booklet discharge conveyor 112 includes a pair of pulleys 121, a conveyor belt 122, and a booklet discharge motor 123.

The pair of pulleys 121 are hung with a conveyor belt 122 to rotate the conveyor belt 122.

The transport belt 122 is an annular belt that is hung on a pair of pulleys 121. The transport belt 122 transports the booklet B by moving endlessly by the rotation of the pulley 121.

The booklet discharge motor 123 rotates and drives one of the pair of pulleys 121. The other pulley 121 is driven by the one pulley 121 via the transport belt 122.

The receiving stand 113 receives the booklet B discharged by the booklet discharging conveyor 112. The receiving table 113 is arranged outside the housing 51.

The bookbinding control unit 50 controls the operation of each unit of the bookbinding device 3. The bookbinding control unit 50 includes a CPU, RAM, ROM, a hard disk, and the like. The bookbinding control unit 50 has a function of selecting a paper feed tray in which the cover paper P2 is stored in cooperation with the print control unit 17 described above.

Further, the bookbinding control unit 50 includes data on the thickness of the paper bundle PS acquired in the clamp unit 44, information on the type of the cover paper P2, and position information on the cover paper P2 obtained by the paper sensor 89 in the molding unit 46. By using the above, the position of the cover paper P2 can be appropriately set with respect to the back folding plate 90 of the molding portion 46, and control for performing unnecessary binding can be performed.

Further, the bookbinding control unit 50 determines whether or not the thickness of the paper bundle PS measured by the paper bundle thickness sensor 79 is equal to or greater than a predetermined threshold value. This threshold value is set as a thickness that does not collapse when the paper bundle PS is abutted against the abutting plate 92 via the cover paper P2.

When the thickness of the paper bundle PS measured by the paper bundle thickness sensor 79 is equal to or greater than a predetermined threshold value, it is assumed that the end face PSa on the back side of the paper bundle PS is abutted against the abutting plate 92 via the cover paper P2. However, it is unlikely that the end face PSa will be crushed.

Therefore, the bookbinding control unit 50 controls the back folding plate motor 91 in a state where the end surface PSa on the back side of the paper bundle PS is abutted against the abutting plate 92 via the cover paper P2 to control the pair of back folding plates. Move the 90s in the left-right direction so that they are close to each other. As a result, the boundary portion between the spine and the front cover of the front cover paper P2 and the boundary portion between the spine and the back cover can be bent.

On the other hand, when the thickness of the paper bundle PS measured by the paper bundle thickness sensor 79 is less than a predetermined threshold value, the end face PSa on the back side of the paper bundle PS is abutted against the abutting plate 92 via the cover paper P2. Then, the end face PSa may be crushed.

Therefore, the bookbinding control unit 50 controls the center folding motor 98 to rotate the center folding roller 99 so that the back surface and the side surface of the paper bundle PS coated by the adhesive coating unit 45 are wrapped with the cover paper P2. The paper bundle PS and the cover paper P2 are sandwiched between the paper bundle PS and the cover paper P2. As a result, even when the paper bundle PS is thin, the boundary portion between the spine and the front cover of the front cover paper P2 and the boundary portion between the spine and the back cover can be bent.

Next, the operation of the bookbinding device 3 will be described.

4 to 6 are explanatory views schematically explaining the operation of the bookbinding apparatus 3. Here, the operation when the thickness of the paper bundle PS measured by the paper bundle thickness sensor 79 is less than a predetermined threshold value will be described in detail.

As shown in FIG. 4A, the text transport unit 41 transports the printed text paper P1 sent out from the printing device 2 to the matching unit 43.

Then, the matching unit 43 aligns a plurality of printed text papers P1 to create a paper bundle PS composed of a plurality of text papers P1. The paper bundle thickness sensor 79 measures the thickness of the paper bundle PS. Here, it is assumed that as a result of the measurement, it is determined that the thickness of the paper bundle PS is less than a predetermined threshold value.

Further, as shown in FIG. 4B, the cover sheet transport section 42 transports the printed cover sheet P2 sent out from the printing device 2 to the molding section 46.

Then, the paper bundle PS is moved to the adhesive application portion 45 in a state of being clamped by the pair of clamp plates 76. The adhesive application unit 45 applies the hot melt adhesive to the end face PSa on the back side of the moved paper bundle PS.

Next, as shown in FIG. 5A, the paper bundle PS is moved upward to the middle folding roller 99 of the forming portion 46 in a state of being clamped by the pair of clamp plates 76.

In the molding unit 46, the center-folding roller 99 rotates while sandwiching the paper bundle PS and the cover paper P2 so that the back surface and the side surface of the paper bundle PS coated by the adhesive coating unit 45 are wrapped by the cover paper P2. As a result, the booklet B is formed.

The booklet transfer conveyor 111 receives the booklet B formed by the forming unit 46 and conveys the booklet B to the cutting unit 47.

Then, as shown in FIG. 6A, the cutting portion 47 cuts the surplus cover paper P2 protruding from the end side of the paper bundle PS in the booklet B molded by the molding portion 46.

As shown in FIG. 6B, the booklet discharge conveyor 112 receives the booklet B from the booklet transport conveyor 111, transports it to the right, and discharges it to the receiving table 113.

Here, the paper bundle thickness sensor 79 measures the thickness of the paper bundle PS, but the thickness is not limited to this, and the thickness of the paper bundle PS is determined based on the number of prints included in the job and the paper type. It may be calculated.

(Additional note)
This application discloses the following inventions.

(Appendix 1)
An adhesive application means for applying an adhesive to the back surface and a part of the side surface of a paper bundle composed of a plurality of body sheets, and an adhesive application means.
An acquisition means for acquiring the thickness of the bundle of paper, and
A center-folding roller that rotates while sandwiching the paper bundle and the cover paper so that the back surface and the side surface of the paper bundle applied by the adhesive application means are wrapped with the cover paper.
When the thickness acquired by the acquisition means is less than a predetermined threshold value, the control means for rotating the middle folding roller so as to sandwich the paper bundle and the cover paper.
A bookbinding device characterized by being equipped with.

As a result, even when the thickness of the paper bundle is thin, the end face of the paper bundle is not crushed, so that the booklet by wrapping and binding can be appropriately formed.

1 Bookbinding system 2 Printing device 3 Bookbinding device 11 Feeding section 12 Printing section 13 Contact section 14 Top transfer section 15 Paper ejection section 16 Inversion section 17 Printing control section 29 Switching section 30 Contact roller 31 Top transfer section Roller 32 Switching section 33 Paper ejection Roller 34 Paper discharge stand 35 Reversing roller 36 Refeeding roller 37 Switching gate 41 Body transport part 42 Cover transport part 43 Matching part 44 Clamp part 45 Adhesive application part 46 Molding part 47 Cutting part 48 Guide part 49 Discharge part 50 Bookbinding control Unit (control means)
56 Body transfer roller 61 Switching unit 63 Cover transfer roller 76 Clamp plate 79 Paper bundle thickness sensor (acquisition means)
81 Adhesive accommodating part 82 Coating roller 86 Cover carrying roller 90 Back folding plate plate 92 Butt plate plate 98 Middle folding motor 99 Middle folding roller 111 Booklet transport conveyor 112 Booklet discharge conveyor 113 Receiving stand

Claims (1)

An adhesive application means for applying an adhesive to the back surface and a part of the side surface of a paper bundle composed of a plurality of body sheets, and an adhesive application means.
An acquisition means for acquiring the thickness of the bundle of paper, and
A center-folding roller that rotates while sandwiching the paper bundle and the cover paper so that the back surface and the side surface of the paper bundle applied by the adhesive application means are wrapped with the cover paper.
When the thickness acquired by the acquisition means is less than a predetermined threshold value, the control means for rotating the center-folding roller so as to sandwich the paper bundle and the cover paper, and the control means.
A bookbinding device characterized by being equipped with.

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