JP4901356B2 - Bookbinding apparatus and image forming system - Google Patents

Description

  The present invention automatically binds sheets that have been subjected to image formation by a bookbinding apparatus and a copier / printer that wraps the sheets that are sequentially carried in, bundles them with a cover, and then wraps them with a cover. The present invention relates to an image forming system.

  Generally, an image created by a computer or word processor is printed by a printing device, a series of printed sheets are aligned and aligned in a bundle, and a molten adhesive is applied to the sheet bundle and wrapped with a cover. A bookbinding apparatus that performs case binding is widely used (see, for example, Patent Document 1 and Patent Document 2). This type of bookbinding apparatus is configured as a stand-alone apparatus that binds the paper sheets prepared in the supply port in a bundle or is connected to a printing apparatus such as a copying machine, and sequentially forms the sheets on which images are formed. The image forming apparatus is configured as a post-processing apparatus that binds and binds in a bundle. In particular, the latter image forming apparatus has recently been utilized as an on-demand printing system that outputs in a timely manner whenever a booklet for various business use is required.

  As these bookbinding apparatuses, for example, in Patent Document 1, print sheets sequentially fed from a paper discharge port of a copying machine are collected in a bundle shape, and the sheet bundle is moved to a position where an adhesive can be applied, and then bonded. Apply adhesive while moving the adhesive holding unit that melts the agent along the end face of the sheet bundle, and then join the sheet bundle with the adhesive applied to the end face and the cover sheet in an inverted T shape Thus, a bookbinding apparatus for folding is disclosed. Similarly, Patent Document 2 discloses a bookbinding apparatus in which a sheet bundle is conveyed and held in an upright state, and an adhesive is applied and adhered to a cover sheet while moving an adhesive application unit parallel to the end face of the sheet bundle. As described above, the case binding apparatus conventionally includes a holding unit that holds sheets aligned in a bundle, and an adhesive holding unit that holds the adhesive in a molten state. The adhesive is applied to the sheet bundle end by moving the adhesive holding means.

JP 2005-335909 A JP 2004-209870 A

  In the bookbinding apparatus as described above, for example, when an abnormality such as a paper jam or an apparatus failure occurs, if the bookbinding operation is continued as it is, the apparatus may be damaged. Therefore, it is necessary to stop the operation once. However, if the operation is stopped while the adhesive is being applied to the sheet bundle, the heat source means that melts the adhesive is stopped. The adhesive will cool and harden. In such a case, even if the restoration process by the operator is completed, the sheet bundle and the adhesive application unit are in the bonded state, and the sheet bundle processing path is blocked. It is necessary to wait until the adhesive is melted again in order to deal with this, which takes time and causes a reduction in the operating efficiency of the system.

  Also, if the adhesive is stopped during application of the adhesive, the adhesive holding means is still hot even if heating of the adhesive by the heat source means is stopped. There is a risk of touching the high temperature adhesive holding means when putting the hand inside.

  The present invention reduces the waiting time for resuming the operation while ensuring the safety when the operator performs the recovery process even if an abnormality such as a jam or an error occurs during the bookbinding process and the bookbinding process is interrupted. An object of the present invention is to provide a bookbinding apparatus and an image forming system capable of performing the above.

The bookbinding apparatus of the present invention, a sheet bundle holding means for the sheet bundle to retain, an adhesive holding means for holding while heating and melting the thermoplastic adhesive, by moving the sheet bundle holding means, said sheet First moving means for moving the sheet bundle held by the bundle holding means to an adhesive application position where the adhesive holding means applies adhesive to the sheet bundle, and the adhesive holding means, the sheet Abnormality detection for detecting an operation abnormality of each drive unit in the apparatus, a retracted position that does not come into contact with the sheet bundle held at the adhesive application position by the bundle holding means, and a second moving means that moves to the adhesive application position. and means, based on a detection result of the abnormality detecting means, and control means for controlling said first moving means and the second moving means, the control means, abnormal operation by the abnormality detecting means When the second moving means is not abnormal in operation when detected, the second moving means moves the adhesive holding means to the retracted position, while the control means operates abnormally by the abnormality detecting means. When the second moving unit is abnormal in operation, the sheet bundle held by the sheet bundle holding unit is moved by the first moving unit to a position not in contact with the adhesive holding unit. Features.

  According to this configuration, when an abnormality such as a paper jam or an apparatus failure occurs, the adhesive holding means is moved to the standby position by separating the sheet bundle and the adhesive application means, so that the restoration process by the operator is completed. When this happens, it is possible to avoid a situation where the sheet bundle processing path is blocked while the sheet bundle and the adhesive application means remain adhered, reducing the waiting time at the time of restart and improving the system operating efficiency. it can. In addition, since the adhesive holding means is retracted to the standby position, it is possible to avoid touching the adhesive holding means even if the door of the apparatus is opened and a hand is put into the apparatus for recovery, and safety in the recovery process Can be secured.

In the bookbinding apparatus according to the present invention, in the bookbinding apparatus, the control unit may include a sheet bundle held by the sheet bundle holding unit and the adhesive holding unit when an abnormality is detected by the abnormality detection unit. The bookbinding operation is stopped in a state where no contact is made .

  The image forming system according to the present invention includes an image forming apparatus that forms an image, transfers the sheet to a sheet, and sends the sheet downstream, and a sheet connected to the downstream side of the image forming apparatus and sent from the image forming apparatus in a bundle. Any of the bookbinding apparatuses that are stacked and bonded to a cover sheet and bound, and the image forming apparatus and a sheet that is connected to the downstream side of the bookbinding apparatus, or a sheet that has been bound by the bookbinding apparatus. And a sheet post-processing apparatus that performs post-processing on the bundle.

  According to the present invention, even when an abnormality such as a jam or an error occurs during the bookbinding process and the bookbinding process is interrupted, the waiting time for resuming the operation is reduced while ensuring the safety when the operator performs the recovery process. can do.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is an overall configuration diagram of an image forming system according to an embodiment of the present invention. The image forming system according to the present embodiment includes an image forming apparatus A such as a copying machine, a printer, and a printing machine, a bookbinding apparatus B attached downstream of the image forming apparatus A, an image forming apparatus A, and a bookbinding apparatus B. And a sheet post-processing apparatus C attached downstream.

  The image forming apparatus A includes a paper feeding unit 10 and an image forming unit 20. The sheet feeding unit 10 is provided with a sheet feeding cassette 11 that can store sheets of a predetermined standard size. The sheets stored based on a signal from the image forming unit 20 are fed to the sheet feeding path 12 one by one. Separate feed.

  In the image forming unit 20, an electrostatic latent image is formed on the photosensitive drum 21 based on the image data by the laser transmitter 22, toner is attached by the developing machine 23, and then transferred onto the sheet by the transfer unit 24. Fixing is performed by the fixing device 25. Thereafter, in the case of only the front surface, it is discharged as it is to the apparatus downstream from the paper discharge path 27.

  In the case of forming an image on the back side, the sheet is returned to the sheet feeding path 12 while being reversed through the sheet reversing path 26 to form an image on the back side. A bookbinding apparatus B is attached downstream of the paper discharge path 27.

  The bookbinding apparatus B applies a sheet carry-in path 31 for receiving sheets discharged from the image forming apparatus A, a stacking unit 35 that stacks and aligns the sheets in a bundle, and applies a thermoplastic adhesive to the end surfaces of the stacked sheet bundles. Then, the bookbinding unit 40 that adheres to the cover sheet, the cover sheet conveyance path 33 that feeds the cover sheet to the bookbinding unit 40, the cutting unit 50 that can cut the booklet edge, and the booklet that has been bound vertically. And a bookbinding stacking unit 56 for stacking while holding in the direction.

  In the bookbinding apparatus B, the sheets discharged from the image forming apparatus A are sent to the stacking unit 35 through the stacking conveyance path 32 branched from the sheet carry-in path 31, and are aligned in a bundle in a substantially horizontal direction by the stacking unit 35. They are aligned and stacked on the tray of the stacking unit 35. The sheet bundle S1 is sent to the bookbinding unit 40 by driving means (not shown).

  The bookbinding unit 40 melts the adhesive, a bundle gripper 37 that presses and holds the sheet bundle, a bundle moving unit 38 that transfers the sheet bundle S1 held by the bundle gripper 37 to a position where the adhesive can be applied, and the like. The adhesive unit 41 being held, the adhesive unit moving unit 42 (see FIG. 3) for moving the adhesive unit 41 in parallel with the end face of the sheet bundle S1, and the back for forming the back of the bookbinding after bonding to the cover sheet. The folding part 45 and a bundle conveying part 46 that conveys the bound booklet to the downstream cutting part 50 are configured.

  2 (a) and 2 (b), the adhesive unit 41 includes a container 41a containing an adhesive, a heater 41b that heats and melts the adhesive, and a sheet that stirs the adhesive while rotating. It is mainly comprised from the application | coating roller 41c which apply | coats an adhesive agent to the edge part of bundle | flux S1.

  As shown in FIG. 3, the bonding unit moving section 42 has an endless belt 42a for moving the bonding unit 41 between the bonding standby position Pa and the bonding folding position Pb, and one end of the endless belt 42a on the bonding standby position Pa side. Is provided with an adhesion unit moving motor M42 stretched around a rotating shaft.

  Further, the bookbinding unit 40 includes a coating roller motor M41 for rotating the coating roller 41c described above, a bundle gripper motor M37 that drives opening and closing of the bundle gripper 37, and a bundle that drives raising and lowering the bundle moving unit 38. A drive unit such as a movement motor M38 and a drive unit error detection unit 80 (see FIG. 4) for detecting errors in the drive unit and the adhesion unit movement motor M42 are provided. The drive unit error detection unit 80 detects, for example, whether there is an abnormality such as a step-out in the motor by detecting a slit of an encoder attached to the motor of each drive unit with a photo sensor.

Note that the error detection means corresponding to the drive unit error detection unit 80 is provided with a sensor for detecting the position of the unit configured to be movable, and the unit position cannot be detected within a predetermined time even when the motor is driven. Sometimes it may be configured to detect errors.

  FIG. 4 is a configuration diagram of an electric control system in the bookbinding unit 40. As shown in FIG. 4, a control unit 70, a bundle gripper motor M37 that drives opening and closing of the bundle gripper 37, a bundle movement motor M38 that drives raising and lowering the bundle movement unit 38, and an application that rotates an application roller 41c. A roller motor M41, an adhesive unit moving motor M42 that drives the adhesive unit moving unit 42, a motor driving unit 43 that drives each of the motors M37 to M42, a sheet passing sensor S31, S32a, S33a, S33b, and a paper discharge sensor S32b, S33c, a bundle gripper position detector S38, an adhesive unit standby position sensor S41a, and an adhesive unit return sensor 41b are provided. In the control unit 70, a ROM 71, a RAM 72, a timer unit 73, an IO interface 74, a jam determination unit 75, a drive unit abnormality determination unit 76, and an adhesion unit separation control unit 77 are provided. Details of each of the units including the control unit 70 will be described later.

The basic bookbinding operation in the bookbinding unit 40 is as follows.
That is, the transported sheet bundle S1 is held by the bundle gripper 37 and rotated from the substantially horizontal direction to the vertical direction. Thereafter, the sheet bundle S1 is transferred from the sheet bundle standby position P1 shown in FIG. 2A to the adhesive application position shown in FIG. The adhesive unit 41 is applied while moving from the adhesive standby position Pa shown in FIG. 3 to the adhesive folding position Pb along the end face of the sheet bundle S1 held in the vertical direction at the adhesive application position by the adhesive unit moving unit 42. The roller 41c is applied while pressing the adhesive against the sheet bundle S1. When the adhesion unit 41 reaches the adhesion folding position Pb, the application is performed again on the sheet bundle S1 while moving from the adhesion folding position Pb to the adhesion standby position Pa in a state where the application roller 41c is rotated in the reverse direction.

  When the adhesive application operation for the sheet bundle S1 is completed, the sheet is transferred to the adhesion position by the bundle moving unit 38. At the bonding position, a cover sheet conveyance path 33 is provided which branches from the sheet carry-in path 31 and is disposed in a direction perpendicular to the path for conveying the sheet bundle S1, and a reference position of the conveyed cover sheet (not shown). Align. The sheet bundle S1 after application of the adhesive is lowered and pressed against the cover sheet. Thereafter, the cover sheet and the sheet bundle S1 are pressed by applying a predetermined pressure from both sides by the back folding part 45, and the bookbinding back part is formed on the cover sheet. When the cover bonding operation is completed, the back folding portion 45 is moved to a position where the bundle conveying path is not obstructed by a driving means (not shown), and the bound booklet is conveyed to the downstream cutting portion 50 by the bundle conveying portion 46 below. .

  The cutting unit 50 includes a turntable 51 that turns the booklet, a press unit 52 that presses and holds the booklet during cutting, and a cutting unit 53 that cuts the periphery of the booklet. The turntable 51 is configured to grip and turn the booklet conveyed by the bundle conveying roller 46 from both sides, and position the sheet end at the lower cutting position in the order of, for example, the top portion, the ground portion, and the fore edge portion. . The press part 52 is composed of an opposing pedestal member and a movable press member (both not shown), and is fixed at a cutting position while applying a predetermined pressure to the booklet. The cutting part 53 is configured to cut a booklet fixed at a cutting position by a cutting blade. The booklet whose end is cut by the cutting unit 50 is transferred to the bookbinding stack 56 on the downstream side by the booklet transport tray 54.

  The bookbinding stacking unit 56 includes a stacking tray 57 that stacks and holds booklets, and a stacking drive unit 58 that can move both the stacked booklets and the stacking tray 57 in the horizontal direction. The stacking tray 57 is configured to be inclined at a predetermined angle from the horizontal direction so as to support the booklet-like sheets in an inverted state, to support the back surface of the booklet-like sheets, and to move according to the stacking amount by the stacking drive unit 58. Yes.

  On the other hand, the cover transport path 33 of the bookbinding unit 40 also serves as a discharge path to the outside of the bookbinding apparatus B as it is, and the post-processing apparatus C is attached to this path.

  The post-processing apparatus C stores a print sheet that is not subjected to the above-described bookbinding process from the image forming apparatus A to the paper discharge tray 61 via the sheet carry-in path 31 and the cover transport path 33. Further, this post-processing apparatus C can also be provided with post-processing functions (not shown) such as stapling, punching, and stamping, which are different from the bookbinding processing described above. Various mechanisms are known and will not be described.

  In the illustrated configuration, a cover sheet on which a title or the like is printed by the image forming apparatus A is supplied to the sheet carry-in path 31 via the sheet carry-in path 31. On the other hand, the cover sheet may be supplied from an inserter device (not shown) prepared separately from the image forming apparatus A. In this case, the cover conveyance path 33 can be configured as a path independent of the sheet carry-in path 31. In this case, for example, an inserter device is disposed between the image forming apparatus A and the bookbinding apparatus B. The print sheet may be conveyed from the paper discharge path 27 to the sheet carry-in path 31 and the cover sheet may be conveyed from the inserter device to the cover sheet conveyance path 33.

  In the image forming system according to the present embodiment, when a paper jam (jam) occurs in each of the above-described paths or an abnormality occurs in the conveyance drive mechanism, the adhesive unit 41 and the sheet bundle S1 are in the middle of applying the adhesive, that is, the above-described adhesive unit 41 and the sheet bundle S1. In order to prevent the operation of the bookbinding apparatus B from stopping in the contacted state, the following control is performed.

  Each sheet conveyance path of the bookbinding apparatus B is provided with a jam detecting means for detecting a paper jam, staying, and the like. That is, a sheet passing sensor S31 that detects the passage of a sheet is provided in the sheet carry-in path 31, a sheet passing sensor S32a and a paper discharge sensor S32b are provided in the accumulation conveyance path 32, and sheet passage sensors S33a and S33b are provided in the cover conveyance path 33. Each of the paper discharge sensors S33c is arranged. These sensors transmit a signal indicating whether or not there is a sheet in the path to the control unit 70 (see FIG. 4). The control unit 70 is provided with the timer unit 73 and the jam determination unit 75 described above, and detects and detects a paper jam in each path by a signal from each sensor.

Here, the determination of a paper jam (jam) in each path by the jam determination unit 75 is performed by one of the following methods, for example.
(1) Jam is determined when the sheet detected by the upstream sensor does not reach within a predetermined time.
(2) Jam is determined when the trailing edge of the sheet is not detected within a predetermined time after the leading edge of the sheet is detected.
(3) Jam is determined when the leading edge of the succeeding next sheet is not detected within a predetermined time after the trailing edge of the preceding sheet is detected.

  As described above, the jam determination unit 75 in the control unit 70 is configured so that the paper in each path is based on the sheet detection signals from the sensors S31, S32a, S32b, S33a, S33b, and S33c arranged in the paths 31, 32, and 33. It is determined whether clogging has occurred.

  Operation modes such as “bookbinding mode”, “bookbinding cutting mode”, “paper discharge stack mode”, and “post-processing mode” are transmitted to the control unit 70 from the control unit 90 of the image forming apparatus A through the IO interface 74. At the same time, the printing sheet size of the image forming apparatus A, single-sided / double-sided printing information, binding margin information such as top binding and back binding, and other information necessary for bookbinding are transmitted.

  From the control unit 70, for example, an adhesive glue melting warm-up signal, a jam detection signal, an apparatus abnormality occurrence signal, and the like are transmitted. The “bookbinding mode” is a processing operation in which the sheets printed by the image forming apparatus A are arranged in a bundle and are mounted on the cover sheet. The “bookbinding cutting mode” is a method for cutting and cutting the periphery of the booklet sheet mounted. The “sheet discharge stack mode” is a processing operation for directly carrying out a print sheet printed by the image forming apparatus A to the sheet discharge tray 61, and the “post-processing mode” is provided in the above-described post-processing apparatus C. Processing operations such as staples, stamps, and punches.

  The image forming system configured as described above is controlled in the sequence shown in FIGS. 5 and 6 by the control program stored in the ROM 71 shown in FIG. This will be described below with reference to the flowchart shown in FIG. In this figure, for example, when “bookbinding mode” or “bookbinding cutting mode” is selected from the above-described operation modes on a control panel (not shown) of the image forming apparatus A, the control unit 90 of the image forming apparatus A The command (instruction signal) and information (data) such as binding specifications necessary for the bookbinding process are transmitted to the control unit 70 of the bookbinding apparatus B. After transmitting the information to the control unit 70 of the bookbinding apparatus B, the control unit 90 of the image forming apparatus A executes a predetermined printing operation. Simultaneously with the execution of this printing operation, the control unit 90 of the image forming apparatus A transmits the print sheet size information and print sheet copy alignment information (for example, a job end signal) to the control unit 70 of the bookbinding apparatus B. When the printed sheet is unloaded from the paper discharge path 27 from the image forming apparatus A, the control unit 70 of the bookbinding apparatus B starts a predetermined bookbinding process (step S101).

  During the bookbinding process, the controller 70 of the bookbinding apparatus B detects an apparatus abnormality as follows (steps S102 to S108). First, “detect jams such as sheet delay and stay in each sheet conveyance path”. This is because each of the sensors arranged in the conveyance path, that is, the sheet passage sensor S31 arranged in the sheet carry-in path 31, the sheet passage sensor S32a and the paper discharge sensor S32b arranged in the accumulation conveyance path 32, and the cover conveyance path. Control unit of the bookbinding apparatus B based on detection signals from the sheet passing sensors S33a and S33b and the paper discharge sensor S33c arranged in the 33 and a sensor that monitors the conveyance of the sheet bundle in the bookbinding processing path (not shown in detail). It is determined whether or not the jam determination unit 75 in 70 is a jam (step S102). If the jam determination is “no jam” (“NO” in step S102), a predetermined bookbinding process is executed.

  On the other hand, when the jam determination indicates “jam occurrence” (“YES” in step S102), the adhesion unit separation control unit 77 of the control unit 70 performs the following determination. That is, when the jam determination unit 75 of the control unit 70 is “jamming”, the adhesive unit standby position sensor S41a determines whether the adhesive unit 41 is in the adhesive standby position Pa that is not in contact with the sheet bundle S1 and cannot be accessed from the front. The determination is made based on the state of the adhesive unit return sensor S41b (step S103). If “YES” in this adhesion unit position detection determination, a jam treatment (step S105, step S106) described later is executed. On the other hand, when the determination is “NO”, the adhesive unit 41 is retracted (step S104). That is, the adhesion unit moving motor M42 is driven until the adhesion unit standby position sensor S41a is turned on to move the adhesion unit 41 to the adhesion standby position Pa. After the bonding unit 41 is moved to the bonding standby position Pa, the bonding unit moving motor M42 is stopped, and a jam treatment (step S105, step S106) is executed.

  In the jam treatment, first, a jam signal is issued (step S105). This signal, for example, displays a jam display on the control panel of the image forming apparatus A and stops the entire apparatus. When the jam processing such as the removal of jammed paper is performed by the operator (step S106), the bookbinding processing is resumed (step S107). Then, when the final booklet binding is completed (step S108), a series of bookbinding processing and a jam sequence are ended (step S109).

  Similar to the jam sequence described above, the control unit 70 of the bookbinding apparatus B executes an error sequence of the apparatus. The flowchart is shown in FIG. The “apparatus error” according to the present exemplary embodiment refers to a case where the operation becomes impossible due to an abnormality in the drive system in the bookbinding apparatus B, and in the image forming apparatus A and the bookbinding apparatus B, the drive system and the optical system. Indicates the case where image formation and operation cannot be continued due to an abnormality. Hereinafter, a case where an error occurs in the drive system of the bookbinding apparatus B will be described.

  When an error occurs in the image forming apparatus A and the bookbinding apparatus B (step S201), whether the adhesive unit 41 is in the adhesive standby position Pa that does not contact the sheet bundle S1 is the state of the adhesive unit standby position sensor S41a and the adhesive unit folding sensor S41b. (Step S202). If the determination is NO at this time, it is determined from the error detection signal whether the adhesive unit 41 can be moved (step S203). If the result of this determination is that the bonding unit 41 can be moved, the bonding unit 41 is moved to the bonding standby position Pa (step S204).

  On the other hand, when the bonding unit 41 cannot move, the bonding unit separation control unit 77 of the control unit 70 causes the bundle gripper 37 to contact the sheet bundle standby position P1 (that is, the bonding unit 41 contacts the sheet bundle S1). Is determined from the state of the bundle gripper standby position sensor S38 (step S205). If it is determined that the bundle gripper 37 is not at the sheet bundle standby position P1, the bundle movement motor M38 is driven to move the bundle gripper 37 until the bundle gripper standby position sensor S38 is turned on (step S206).

  When it is detected that the adhesive unit 41 is at the adhesive standby position Pa or when it is detected that the adhesive unit 41 is not at the adhesive standby position Pa and the bundle gripper 37 is at the sheet bundle standby position P1, the control unit 70 An error occurrence is notified to the image forming apparatus A (step S207), and then a series of sequences is terminated (step S208). As described above, the adhesion unit separation control unit 77 of the control unit 70 moves the adhesion unit 41 or the bundle gripper 37 to a predetermined standby position when a jam error is detected. Prevents adhesion with S1.

  As described above, according to the bookbinding system of the present embodiment, in the bookbinding apparatus B, when an abnormality such as a paper jam (jam) or an apparatus failure occurs and the bookbinding process is interrupted, the bonding unit 41 or the bundle gripper 37 is removed. Since the control is performed so as to move to a predetermined standby position, the adhesion between the adhesion unit 41 and the sheet bundle S1 can be prevented, and the waiting time for resuming the operation can be reduced while ensuring the safety when the operator performs the return process. Can do.

  In the above embodiment, when an abnormality such as a jam or an error occurs, the heater is controlled so that the adhesive is maintained at a predetermined temperature equal to or lower than the standby temperature during the period from the stop of the bookbinding operation to the recovery. You may control. As a result, even when the ambient temperature is low or when it takes a long time to recover and the adhesive solidifies, the adhesive can be melted in a short time after the operator's recovery process is completed, and then melted again. The waiting time until it can be shortened.

  The present invention can be applied to an apparatus that binds and cuts an image-formed sheet and any system using such an automatic bookbinding system.

1 is an overall configuration diagram of a bookbinding system according to an embodiment of the present invention. FIG. 3 is an explanatory diagram of a sheet bundle moving unit in the bookbinding apparatus of FIG. 1. Explanatory drawing of the adhesive agent movement part in the bookbinding apparatus of FIG. The block diagram which shows schematic structure of the electric system except the mechanism part of the bookbinding apparatus of FIG. The flowchart which shows the jam processing of the control part of FIG. The flowchart which shows the error process of the control part of FIG.

Explanation of symbols

A image forming apparatus B bookbinding apparatus C post-processing apparatus 37 bundle gripper 38 bundle moving section 41 bonding unit 41a container 41b heater 41c coating roller 42 bonding unit moving section 43 motor driving section 70 control section 71 ROM 72 RAM
73 Timer unit 74 IO interface 75 Jam determination unit 76 Drive unit abnormality determination unit 77 Adhesion unit separation control unit 80 Drive unit error detection unit 90 Control unit of image forming apparatus A M37 Bundle gripper motor M38 Bundle movement motor M41 Application roller M42 Adhesion unit Movement motor S38 Bundle gripper position detection unit S41a Adhesion unit standby position sensor S41b Adhesion unit return sensor S31 Sheet passage sensor S32a Sheet passage sensor S33a Sheet passage sensor S33b Sheet passage sensor S32b Discharge sensor S33c Paper discharge sensor Pa Adhesion standby position Pb Adhesion return position

Claims (3)

And the sheet bundle holding means that holds the sheet bundle,
An adhesive holding means for holding the thermoplastic adhesive while heating and melting;
By moving the sheet bundle holding means, the sheet bundle held by the sheet bundle holding means is moved to an adhesive application position where the adhesive holding means applies an adhesive to the sheet bundle. Transportation means;
A second moving means for moving the adhesive holding means to a retracted position that does not contact the sheet bundle held at the adhesive application position by the sheet bundle holding means, and to the adhesive application position;
An abnormality detection means for detecting an operation abnormality of each drive unit in the apparatus ;
Control means for controlling the first moving means and the second moving means based on the detection result of the abnormality detecting means,
The control means moves the adhesive holding means to the retracted position by the second moving means when the second moving means is not abnormal when an abnormal operation is detected by the abnormality detecting means,
On the other hand, when the second moving unit is abnormal in operation when the abnormality detecting unit detects an operation abnormality, the control unit causes the first moving unit to transfer the sheet bundle held by the sheet bundle holding unit. The bookbinding apparatus is moved to a position not in contact with the adhesive holding portion . The control unit stops the bookbinding operation in a state where the sheet bundle held by the sheet bundle holding unit and the adhesive holding unit are not in contact when an operation abnormality is detected by the abnormality detection unit. The bookbinding apparatus according to claim 1 . An image forming apparatus that forms an image, transfers the image to a sheet, and sends the sheet downstream. The sheets connected to the downstream side of the image forming apparatus and fed from the image forming apparatus are stacked in a bundle and bonded to a cover sheet to be bound. The post-processing of the bookbinding apparatus according to claim 1 or 2 , and a sheet bundle from the image forming apparatus connected to the downstream side of the image forming apparatus and the bookbinding apparatus or a sheet bundle subjected to the bookbinding process from the bookbinding apparatus. An image forming system comprising: a sheet post-processing apparatus that performs the processing.

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