JP2008080603A - Bookbinding device and image forming system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize quick melting of an adhesive for bookbinding action even under the condition that the fixed amount of the adhesive is housed and, in addition, the deterioration of the adhesive is prevented from developing. <P>SOLUTION: In the case where no predetermined temperature is attained by the temperature of the adhesive 63 detected with an adhesive temperature sensor 631, a housing part heater 61 is controlled from a first warming-up temperature and, at the same time a roller heater 621 is controlled from a second warming-up temperature, while in the case where the predetermined temperature is attained by the temperature of the adhesive 63 detected with the adhesive temperature sensor 631, the housing part heater 61 is controlled from a first action temperature lower than the first warming-up temperature and, at the same time, the roller heater 621 is controlled based on a second action temperature lower than the second warming-up temperature. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a bookbinding apparatus and an image forming system for stacking a plurality of sheets to generate a sheet bundle, and binding the sheet bundle and a cover sheet with an adhesive.

  2. Description of the Related Art A bookbinding apparatus and an image forming system for simply bookbinding a plurality of sheets on which images are formed by a copying machine or a printer are known. An outline of a general bookbinding process in a bookbinding apparatus or the like will be described. First, a plurality of sheets on which images are formed are accumulated and aligned to generate a sheet bundle. Next, an adhesive such as glue is applied to one side of the sheet bundle. Then, the cover sheet is conveyed and stopped at a predetermined position, and the cover sheet is bonded to the adhesive-coated surface of the sheet bundle. In such a procedure, a plurality of sheets and a cover are integrated to form a book.

  By the way, most of the adhesives for joining the sheet bundle and the cover are adhesives (hot melt adhesives) in which a solid adhesive is melted with a heater. In order to perform the bookbinding process using such an adhesive, it is necessary to heat and quickly melt the solid adhesive so as not to deteriorate.

The technique described in Patent Document 1 is a technique of automatically setting the heating temperature of the heater for melting the adhesive as a value inversely proportional to the air temperature. According to this technique, in consideration of the environment, the solid adhesive can be appropriately heated and rapidly melted so as not to deteriorate.
JP 61-43597 A

  If the bookbinding process is performed many times, so much adhesive is required. Therefore, as shown in FIG. 11, a mechanism is conceivable in which a certain amount of adhesive 2000 is accommodated in the bookbinding apparatus and the adhesive is applied to one side of the sheet bundle by the application roller 3000. The mechanism shown in FIG. 11 will be described in detail. The adhesive 2000 is accommodated in the adhesive accommodating portion 1000. A heater 4000 is installed at the bottom of the adhesive container 1000, and the adhesive 2000 is melted when the heater 4000 is heated. The application roller 3000 to which the adhesive 2000 is attached moves along one side of a sheet bundle (not shown), and the adhesive is applied to one side of the sheet bundle. The adhesive 2000 in the adhesive storage unit 1000 has a temperature lowering when the power of the bookbinding apparatus is turned off and the heater 4000 is also turned off, and is in a state different from an appropriate molten state. Therefore, when the power source of the bookbinding apparatus is turned on, it is necessary to quickly heat the adhesive 2000 by the heater 4000 so as to obtain an appropriate molten state.

  However, when the output value of the heater 4000 is increased, the adhesive in the α region in the vicinity of the heater 4000 is deteriorated by heat. On the other hand, if the output value of the heater 4000 is decreased, the adhesive in the β region far from the heater 4000 does not readily warm, and cannot be brought into a molten state that can be quickly bound. That is, in a bookbinding apparatus that accommodates a certain amount of adhesive, it is difficult to heat and quickly melt the solid adhesive without deteriorating it.

  Accordingly, an object of the present invention is to provide a bookbinding apparatus and an image forming system which can quickly melt an adhesive and prevent deterioration of the adhesive even when a certain amount of adhesive is accommodated.

In order to achieve the above object, a bookbinding apparatus according to the present invention comprises:
A bookbinding apparatus that stacks a plurality of sheets to generate a sheet bundle, and binds the sheet bundle and a cover sheet with an adhesive,
An adhesive container for containing the molten adhesive;
Application means for applying the adhesive contained in the adhesive containing part to one end side of the sheet bundle,
A container heater installed in the adhesive container for heating the adhesive;
An application means heater installed in the application means for heating the adhesive;
A first temperature sensor for detecting the temperature of the housing heater;
A second temperature sensor for detecting the temperature of the application means heater;
A third temperature sensor for detecting the temperature of the adhesive contained in the adhesive containing part;
When the temperature of the adhesive detected by the third temperature sensor does not reach a predetermined temperature, the container heater is controlled based on the first warm-up temperature and the application means heater based on the second warm-up temperature When the temperature of the adhesive detected by the third temperature sensor reaches a predetermined temperature, the container heater is controlled based on a first operating temperature lower than the first warm-up temperature and Control means for controlling the application means heater based on a second operating temperature lower than a second warm-up temperature;
It is characterized by having.

The image forming system according to the present invention includes:
An image forming unit for forming an image on a sheet;
A bookbinding unit that stacks a plurality of sheets imaged by the image forming unit to generate a sheet bundle, and binds the sheet bundle and a cover with an adhesive;
An image forming system comprising:
An adhesive container for containing the molten adhesive;
Application means for applying the adhesive contained in the adhesive containing part to one end side of the sheet bundle,
A container heater installed in the adhesive container for heating the adhesive;
An application means heater installed in the application means for heating the adhesive;
A first temperature sensor for detecting the temperature of the housing heater;
A second temperature sensor for detecting the temperature of the application means heater;
A third temperature sensor for detecting the temperature of the adhesive contained in the adhesive containing part;
When the temperature of the adhesive detected by the third temperature sensor does not reach a predetermined temperature, the container heater is controlled based on the first warm-up temperature and the application means heater based on the second warm-up temperature When the temperature of the adhesive detected by the third temperature sensor reaches a predetermined temperature, the container heater is controlled based on a first operating temperature lower than the first warm-up temperature and Control means for controlling the application means heater based on a second operating temperature lower than a second warm-up temperature;
It is characterized by having.

  According to the bookbinding apparatus and the image forming system according to the present invention, the adhesive can be rapidly melted and deterioration of the adhesive can be prevented even when a certain amount of adhesive is accommodated.

  FIG. 1 is a central sectional view of the image forming system.

  The image forming system according to the present invention includes an image forming apparatus A and a bookbinding apparatus B.

  The image forming apparatus A forms an image on a sheet by an electrophotographic method, and includes an image forming unit A1, a document conveying device A2, an image reading unit A3, and a communication unit A4. In the image forming unit A1, a charging device 2, an exposure device 3, a developing device 4, a transfer device 5A, a separating device 5B, and a cleaning device 6 are arranged around the drum-shaped photoreceptor 1, and charging, exposure, development, and the like. Each process of transfer is executed, and a toner image is formed on the sheet S1. The sheet S1 is stored in three paper feed trays 7A, and the sheets S1 are discharged one by one from the paper feed tray 7A and conveyed to the image forming unit A1. The sheet S1 to which the toner image is transferred passes through the fixing device 8 and is fixed. The fixed sheet S1 is discharged out of the image forming apparatus A from the paper discharge roller 7B or conveyed to the refeed path 7C.

  The image forming apparatus A in this embodiment forms a monochrome image on a sheet by an electrophotographic method, but the image forming apparatus according to the present invention is not limited to this embodiment, and a color image forming apparatus. Of course, the image forming method may be any image forming method other than the electrophotographic method.

  The bookbinding apparatus (bookbinding section) B forms a book by bundling a plurality of sheets fed from the image forming apparatus A into a sheet bundle, joining the cover sheet to the sheet bundle, and covering the sheet bundle in a U-shape with the cover sheet. It is a device to do. The bookbinding apparatus B includes a sheet reversing unit 40, a stacking unit 50, a coating unit 60, and a joining unit 70 that joins a cover sheet to a sheet bundle, and further includes a transport unit 10, a paper discharge tray 20, a cover storage unit 80, and a main discharge unit 90. Have The sheet S1 conveyed from the image forming apparatus A to the bookbinding apparatus B is discharged to the sheet discharge tray 20 through the discharge path 12 or conveyed to the sheet reversing unit 40 by the switching gate 11 provided in the conveyance unit 10. Is done. When the bookbinding apparatus B does not perform bookbinding, the sheet S1 is discharged to the paper discharge tray 20. When the bookbinding operation is performed in the bookbinding apparatus B, the sheet S1 is conveyed to the sheet reversing unit 40 through the conveyance path 13, and after being switched back in the sheet reversing unit 40, is conveyed to the stacking unit 50. A set number of sheets S1 are stacked in the stacking unit 50, and when the set number of sheets S1 reaches the stacking unit 50, the stack of sheets S1 is held in a substantially vertical state. Then, an adhesive is applied to the lower surface, which is the back of the bundle of sheets S1, by the application unit 60, and the cover sheet S2 comes into contact with and adheres to the bundle of sheets S1 at the joint 70. The book S3 created by bonding the cover sheet S2 to the bundle of sheets S1 is discharged to the book discharge unit 90.

  FIG. 2 is a front sectional view of the bookbinding apparatus B.

  The sheet S <b> 1 conveyed in the conveyance path 13 is temporarily discharged to the reversing guide 402 through the paper discharge roller 14 and the conveyance roller 401. The sheet S1 discharged onto the reversing guide 402 is aligned in a direction orthogonal to the conveying direction by the alignment member 403, and is temporarily accumulated by the operation of the stopper 404. The stopper 404 is operable between a solid line position and a dotted line position. When the number of sheets S1 temporarily accumulated on the reversing guide 402 reaches a predetermined number, the stopper 404 is released, and the bundle of sheets S1 drops onto the accumulation unit 50. The stacking unit 50 includes a support plate 502 and a receiving plate 506, and the sheet S1 is supported in an inclined state by the support plate 502 and the receiving plate 506. The sheet S <b> 1 supported in the inclined state is suppressed from being lifted by the pressing member 504 and aligned by the alignment plate 505. Then, the holding plate 503 operates to hold the bundle of sheets S1, and the stacking unit 50 rotates about the shaft 501 while holding the bundle of sheets S1, so that the bundle of sheets S1 changes from the inclined state to the vertical state. Become.

  FIG. 3 shows a step of applying an adhesive to the bundle of sheets S1.

  When the second clamping plate 503 is moved toward the sheet S1 by the motor M4 and the second clamping plate 503 presses the sheet S1 with a constant pressure, an increase in the driving torque of the motor M4 is detected by a driving torque detection sensor (not shown). And the movement of the second clamping plate 503 stops. With such a configuration, the bundle of sheets S <b> 1 is firmly held between the first holding plate 502 and the second holding plate 503. The amount of movement of the second clamping plate 503 is measured by the encoder 509 and stored in storage means such as a RAM.

  When the bundle of sheets S1 is sandwiched between the first sandwiching plate 502 and the second sandwiching plate 503, the receiving plate 506 is rotated 90 ° by a drive mechanism (not shown), and is shown in FIG. Evacuate as follows. When the receiving plate 506 is retracted, the lower surface SA of the bundle of sheets S1 and the application roller 62 functioning as application means are not in contact (see FIG. 3C).

  Next, as shown in FIG. 3D, the application unit 60 in which the adhesive 63 is accommodated rises so that the application roller 62 comes into contact with the lower surface SA that is the back of the bundle of sheets S1, and the application unit 60 becomes the sheet. By moving along the lower surface SA of the bundle of S1, the adhesive 63 is applied to the lower surface SA of the bundle of sheets S1.

  As described above, here, a roller is used as the application means for applying the adhesive, but a belt, a brush, or the like can be used as long as it does not impair the gist of the present invention. As a member to be applied, it is advantageous in that the molten adhesive is supplied to the sheet edge without any unevenness from the viewpoint of easy application of the adhesive or heat transfer so that the adhesive immediately before application is sufficiently melted. Therefore, a roller is preferable.

  The application | coating operation | movement of the adhesive agent 63 by the application part 60 is demonstrated using FIG.

  The application unit 60 includes an application roller 62 that applies the adhesive 63 to the sheet bundle, an adhesive 63, an adhesive storage unit 64 that stores the adhesive 63, and a heater (not shown) that melts the solid adhesive. )have. The adhesive 63 is contained in the adhesive container 66 in a solid state, and when the application unit 60 detects that the remaining amount of the adhesive 63 is low, the movable member 65 moves and is supplied to the application unit 60 in the solid state. And it is heated by the heater (not shown) in the application part 60, and the solid adhesive melts in the application part 60.

  At the start of the bookbinding operation, the application unit 60 is at the right end position, which is the initial position, as shown in FIG. This right end position is the back side of the bookbinding apparatus B, that is, the back side of the sheet of FIG. A position detection sensor 68 including a light emitting element 68A and a light receiving element 68B is provided at the right end position. When the position detection sensor 68 detects that a part of the application part 60 is interposed between the light emitting element 68A and the light receiving element 68B, it is determined that the application part 60 exists at the initial position. When the bookbinding operation is started, the application unit 60 moves from the right end position to the left end position (front direction of the bookbinding apparatus B). This movement is performed by driving a belt 67 driven by a motor M3. While the application unit 60 moves to the left end position, the application roller 62 is separated from the lower surface SA of the bundle of sheets S1. Then, at the stage of FIG. 4B in which the application unit 60 moves from the left end position toward the right end position, the application roller 62 is raised by the drive of the motor M2 and comes into contact with the lower surface SA of the bundle of sheets S1 to form an adhesive. 63 is applied. The application roller 62 moves along a trajectory as shown by the broken lines in FIGS. 4A and 4B, and the application roller 62 is rotated by a motor M1 functioning as a driving unit, and the lower surface SA of the sheet bundle. Apply adhesive to

  FIG. 5 shows the joining process of the cover sheet S2.

  As shown in FIG. 2, the cover sheet S <b> 2 is stored in a paper feed tray 801 of a cover sheet storage unit 80 provided at the lower part of the bookbinding apparatus B, and is discharged by a feed roller 802. The discharged cover sheet S2 is cut into an appropriate length as a cover sheet by the cutter 81 and placed on the cover sheet support means 701 in a horizontal state. A cover sheet support unit 701 indicated by a chain line in FIG. 5 includes a plurality of members such as pressing members 71 and 72 and cams 73 and 74 that drive the pressing members 71 and 72. The cutter 81 cuts the cover sheet S2 with a predetermined length based on the size information of the sheet S1 and the information on the thickness of the bundle of sheets S1.

  FIG. 5A shows a state where the application of the adhesive 63 is completed. In the state of FIG. 5A, the cover sheet support means 701 supports the cover sheet S2 at a lower position away from the lower surface of the bundle of sheets S1, as shown in FIG.

  Next, the cover sheet supporting means 701 is driven and lifted by belts 79A and 79B (see FIG. 2) to be in the state shown in FIG. 5B, where the cover sheet S2 is the lower surface SA of the bundle of sheets S1, that is, the adhesive application surface. To touch. The cover pressing members 75, 76, and 77 are raised and lowered together with the cover supporting means 701. Accordingly, as shown in FIG. 5B, when the cover supporting means 701 is raised, the cover pressing members 75, 76, 77 hold the cover S2 from above, and hold the cover S2 in a flat state.

  The cover sheet support means 701 further rises several mm from the position shown in FIG. The position raised several mm is the position shown in FIG. The pressing members 71 and 72 press the front cover S2 from the left and right sides, add corners to the boundary between the back cover and the front cover, and the boundary between the back cover and the back cover, and attach the cover S2 to the sheet S1, thereby forming a book. The

  FIG. 6 is an enlarged view of the adhesive accommodating portion that accommodates the adhesive.

  As described above, the adhesive accommodating portion 64 is supplied with the solid adhesive and is heated by the accommodating portion heater 61 so that the adhesive 63 is in a molten state. That is, the adhesive 63 is a hot melt adhesive. Since a predetermined amount of the adhesive 63 is stored in the adhesive storage section 64, the image forming system can perform a plurality of bookbinding operations continuously.

  By the way, the temperature of the adhesive 63 in the adhesive container 64 decreases when the power of the image forming system is turned off and the container heater 61 is also turned off. Therefore, when the power supply of the image forming system is turned on, it is necessary to quickly heat the adhesive 63 to bring it into an appropriate molten state. Therefore, in addition to the container heater 61, an application means heater 621 (hereinafter also referred to as a roller heater 621) is installed on the application roller 62 to heat the adhesive 63 from above and below. In this way, by heating the adhesive 63 from above and below with the two heaters, a certain amount of the adhesive 63 can be rapidly heated and brought into an appropriate molten state while suppressing the output value of the heater. Further, since the temperature of the adhesive may be lowered as in the case where the image forming system that has been in the OFF state for a long time is turned on, the operation of the housing portion heater 61 and the like is controlled in consideration of the situation. Is preferred. The operation of the accommodating portion heater 61 and the roller heater 621 regarding this point will be described later.

  As described above, by installing one of the plurality of heaters on the application roller 62 as the application means, at least the application roller itself can be heated quickly, and at least the adhesive near the application roller is sufficiently heated. To provide an early state where the adhesive is melted. In addition, since the application roller itself can be heated, it is possible to prevent the adhesive from being hardened on the application roller in the process of applying the adhesive, and the adhesive can be reliably provided to the sheet edge, and the adhesive surface is beautiful. Bookbinding becomes possible.

  The heater for the application means is installed, for example, so as to come into contact with the surface used for application of the application roller from the outside, or in the vicinity of the application roller so as not to contact the surface used for application of the application roller. Or can be installed inside the application roller as shown in FIG.

  The housing heater 61 is provided with a housing temperature sensor 611 that functions as a first temperature sensor, and the roller heater 621 is provided with a roller temperature sensor 622 that functions as a second temperature sensor. Thereby, both heaters can be controlled at an appropriate temperature. In addition, an adhesive temperature sensor 631 that functions as a third temperature sensor is installed at the center of the adhesive container, and it is detected whether the adhesive 63 is at an appropriate temperature.

  FIG. 7 is a block diagram of a control system in the image forming system, and only a representative one is shown here.

  The image forming apparatus A is connected to a PC, which is a terminal such as a personal computer, and a bookbinding apparatus B.

  The CPU 101 controls the operation of the entire image forming apparatus A, and is connected to a ROM (Read Only Memory) 102, a RAM (Random Access Memory) 103, and the like. The CPU 101 reads out various control programs stored in the ROM 102, develops them in the RAM 103, and controls the operation of each unit. In addition, the CPU 101 executes various processes according to the program expanded in the RAM 103 and stores the processing results in the RAM 103. Then, the processing result stored in the RAM 103 is stored in a predetermined storage destination.

  Image data generated by the image reading unit 105 and image data transmitted from a PC connected to the image forming apparatus A are subjected to image processing by the image processing unit 106. The image forming unit 108 receives the image data processed by the image processing unit 107 and forms an image on a sheet.

  A CPU 201 (control means, drive control means) in the bookbinding apparatus B controls the overall operation of the bookbinding apparatus B, and executes a bookbinding operation at a predetermined timing based on a signal transmitted from the image forming apparatus A. The CPU 201 reads various control programs stored in the ROM 202 and develops them in the RAM 203 to control the operation of each unit. The results detected by the storage unit temperature sensor 206, the roller temperature sensor 207, and the adhesive temperature sensor 208 are sent to the CPU 201, and the CPU 201 controls the operations of the storage unit heater 204 and the roller heater 205 based on the detection results.

  FIG. 8 shows the characteristics of the hot melt adhesive, and the ON / OFF operation of the housing heater 61 and the like is controlled in consideration of the characteristics of the hot melt adhesive.

  As shown in the “state” column of FIG. 8, the hot melt adhesive is solid at 70 to 80 ° C. and is semi-liquid at 90 ° C. Therefore, the hot melt adhesive is not in an appropriate molten state within the range of 70 to 90 ° C.

  “Adhesive strength” in FIG. 8 indicates the adhesive strength of the hot melt adhesive. In the column of adhesive strength, “◯” means that the adhesive force is sufficient and good, “Δ” means that the adhesive force is slightly poor, and “x” means that the adhesive force is poor. When this inventor examined the adhesive force of the adhesive agent by changing temperature, it turned out that it has favorable adhesive force if the temperature of an adhesive agent exists in the range of 150-200 degreeC.

  “Evaporation” in FIG. 8 indicates whether or not the hot melt adhesive evaporates. “O” in both columns means that it hardly evaporates, “Δ” means that it evaporates slightly, and “X” means that it evaporates considerably. The inventor examined the presence or absence of evaporation by varying the temperature, and found that there was no problem with evaporation if the temperature of the adhesive was 200 ° C. or lower.

  “Discoloration” in FIG. 8 indicates whether or not the color changes when the adhesive is left at that temperature for 10 hours. In the discoloration, “◯” means no discoloration, “Δ” means that there is a slight discoloration, and “×” means that there is discoloration. The inventor examined the presence or absence of discoloration by varying the temperature, and found that there was no problem with discoloration if the temperature of the adhesive was 180 ° C. or lower.

  Since the adhesive strength of the adhesive is important for the bookbinding process, the appropriate temperature (predetermined temperature) of the adhesive is preferably in the range of 150 to 200 ° C. In consideration of discoloration of the adhesive, it is preferably in the range of 150 to 180 ° C.

  FIG. 9 is a flowchart relating to the heater operation during warm-up.

  First, when the power of the image system is turned on (step S1), it is determined whether or not the temperature of the adhesive is lower than T3 (step S2). The temperature of T3 is, for example, 160 ° C. based on the result examined in FIG. The temperature of T3 is detected by the adhesive temperature sensor 631, and based on the detection result, the CPU 201 determines whether it is less than T3.

  If the temperature of the adhesive is lower than T3 (step S2; Yes), the temperature of the adhesive is lowered, and it can be determined that the molten state is not appropriate, so the binding process is performed without rotating the coating roller. do not do. If the rotation of the application roller is started before the temperature of the adhesive reaches T3, the adhesive may not be melted, and there is a possibility that the machine is stopped due to the load weight or, if worse, the motor or the machine is damaged. In order to execute the bookbinding process, it is necessary to quickly increase the temperature of the adhesive. Therefore, the control temperature of the housing portion temperature sensor is set to T1 ′ which is the control temperature for warming up (first warming up temperature) (step S3), and the control temperature of the roller temperature sensor is set to the control temperature for warming up (second warming up). Temperature) is set to T2 ′ (step S4). T1 'and T2' are temperatures higher than the normal control temperature. Considering the result of the study in FIG. 8 and deterioration of the adhesive, T1 'and T2' are preferably in the range of 160 to 210 ° C. In this embodiment, both T1 'and T2' are set to 200 ° C.

  The housing heater and the roller heater are controlled based on the set T1 'and T2'. If the temperature of the housing heater is lower than T1 ′ (step S5; Yes), the housing heater is turned on (step S6). If the temperature of the housing heater is equal to or higher than T1 ′ (step S5; No), the housing heater is turned on. It is turned off (step S7). If the temperature of the roller heater is lower than T2 ′ (step S8; Yes), the roller heater is turned on (step S9). If the temperature of the roller heater is equal to or higher than T2 ′ (step S8; No), the roller heater is turned off (step S10). . The temperature of the housing heater 61 is detected by the housing temperature sensor 611, and the temperature of the roller heater 621 is detected by the roller temperature sensor 622. Based on the detection result, the CPU 201 controls the operation of the housing heater and the like. The operations from step S3 to step S10 are repeated until the temperature of the adhesive reaches T3, and the adhesive is heated.

  When it is determined that the temperature of the adhesive has reached T3 (step S2; No), rotation of the application roller 62 for applying the adhesive to the sheet bundle is started (step S11). Based on the detection result of the adhesive temperature sensor 631, the CPU 201 controls the operation of the motor M1 that rotates the application roller 62. When the adhesive is heated based on the warm-up control temperature T1'T2 'set in steps S3 to S10, the adhesive around the housing portion heater 61 and the application roller 62 is easily heated. Therefore, when the temperature of the adhesive reaches an appropriate temperature, the application roller 62 is rotated to cause the adhesive in the adhesive accommodating portion to flow, so that deterioration of the adhesive can be sufficiently prevented.

  Then, the control temperature of the accommodating portion temperature sensor is set to T1, which is a normal control temperature (first operating temperature) (step S12), and the control temperature of the roller temperature sensor is set to the normal control temperature (second operating temperature) T2. Set to. T1 is a temperature lower than T1 ', and T2 is a temperature lower than T2'. Considering the deterioration of the adhesive due to heat, the temperature of the adhesive after rotation of the application roller is lowered because the temperature near the heater and the entire inside of the adhesive accommodating portion are brought close to each other by the flow. Considering the results examined in FIG. 8, T1 and T2 are preferably in the range of 150 to 200 ° C. In this embodiment, T1 is set to 180 ° C. and T2 is set to 160 ° C. The heater control for warming up is completed by the operations in steps S12 and S13. Thereafter, the container heater is ON / OFF controlled based on T1, and the roller heater is ON / OFF controlled based on T2.

  FIG. 10 shows changes with time in temperature when the housing heater and the roller heater are controlled as in the flowchart shown in FIG. 9 together with a comparative example.

  FIG. 10 is an explanatory view showing a change with time of temperature detected by each temperature sensor. FIG. 10A is a comparative example, and shows a change over time when the control temperatures of the housing portion heater and the roller heater are always set to the normal control temperatures T1 and T2 after the power supply of the image forming system is turned on. FIG. 10B shows a change in temperature with time when the housing heater and the roller heater are controlled as in the flowchart shown in FIG. 10 (a) and 10 (b), the upper part shows the ON / OFF operation of the container heater, roller heater, and application roller, and the lower part shows the change with time of the temperature detected by each temperature sensor (vertical axis: each temperature sensor). Detection temperature, horizontal axis: elapsed time since the power of the image forming system was turned on). SS1 is a change with time of the temperature detected by the container temperature sensor, SS2 is a change with time of the temperature detected by the roller temperature sensor, SS3 is a change with time of the temperature detected by the adhesive temperature sensor, and will be described with reference to FIG. Thus, T1 ′ and T2 ′ are 200 ° C., T1 is 180 ° C., and T2 and T3 are 160 ° C.

  As shown in FIG. 10A, when the control temperature of the storage section heater is set to T1 and the control temperature of the roller heater is set to T2, the storage section heater is turned on until the temperature detected by the storage section temperature sensor reaches T1, and the roller temperature The roller heater is turned on until the temperature detected by the sensor reaches T2. Although the temperature of the adhesive rises when the housing heater or the like is turned on, the temperature detected by the adhesive temperature sensor after the power supply of the image forming system is turned on reaches about T3 which is the appropriate temperature of the adhesive. It takes about 24 minutes.

  In the operation shown in FIG. 10B, as shown in FIG. 9, the control temperature of the container heater is set to T1 ′ and the control temperature of the roller heater is set to T2 ′ at the time of warming up, and the temperature detected by the adhesive temperature sensor is bonded. When T3, which is the appropriate temperature of the agent, is reached, the control temperature of the container heater is switched to T1, and the control temperature of the roller heater is switched to T2. When the operation shown in FIG. 9 is executed as shown in FIG. 10B, about 20 until the temperature detected by the adhesive temperature sensor reaches T3, which is the appropriate temperature of the adhesive, after the power of the image forming system is turned on. It only takes about a minute. That is, as shown in the flowchart of FIG. 9, if the operation of the housing heater or the like is controlled, the adhesive can be rapidly melted and deterioration of the adhesive can be prevented.

  Since the lower housing heater 61 efficiently controls the overall temperature of the adhesive, it is preferable to set the temperature of the housing heater 61 higher than the adhesive temperature to be controlled. The heat capacity of 61 is preferably larger. Since the upper roller heater 621 is close to the coating portion, it is preferable to control the roller heater 621 at a temperature in the vicinity of the adhesive temperature that is actually desired to be applied. In order to reduce the overshoot of the adhesive temperature, the heat capacity of the roller heater 621 should be smaller. preferable.

  Therefore, it is preferable that the temperature of the lower housing heater> the temperature of the upper roller heater, and the heat amount of the lower housing heater> the heat amount of the upper roller heater.

  As described above with reference to the drawings, a roller heater 621 is installed in the inside of the application roller 62 in addition to the adhesive container heater 61, and the adhesive 63 is heated by two heaters, thereby suppressing the heater output value to a certain amount. A certain adhesive 63 can be quickly heated to an appropriate molten state. Further, only when the temperature of the adhesive is low, the container heater 61 and the roller heater 621 are controlled at a higher control temperature, and when the temperature of the adhesive reaches an appropriate temperature, the control is performed at a lower control temperature. Even when the agent is contained, it can be rapidly melted and the deterioration of the adhesive can be prevented.

  Although the embodiments of the present invention have been described with reference to the drawings, the present invention is not limited to the embodiments, and the present invention can be modified or added without departing from the scope of the present invention. included.

  The image forming system shown in FIG. 1 is an aspect in which the image forming apparatus A and the bookbinding apparatus B are connected. For example, the image forming apparatus A and the bookbinding apparatus B are integrated to form an image as one apparatus. Even a forming system has the same effect.

  Further, in the present embodiment, the operation by the combination of the container heater / accommodator temperature sensor and the roller heater / roller temperature sensor has been described, but the number of heaters and temperature sensors is further increased to be the same as the container heater / accommodator temperature sensor, etc. It is also conceivable to perform the operation.

1 is a central sectional view of an image forming system. 3 is a front sectional view of bookbinding apparatus B. FIG. It is explanatory drawing which shows the process of apply | coating an adhesive agent to the bundle | flux of sheet | seat S1. It is explanatory drawing which shows the application | coating operation | movement of the adhesive agent 63 by the application part 60. FIG. It is explanatory drawing which shows the joining process of cover S2. It is an enlarged view of the adhesive agent accommodating part which accommodates an adhesive agent. 2 is a block diagram of a control system in the image forming system. FIG. It is explanatory drawing which shows the characteristic of an adhesive agent. It is a flowchart figure regarding the heater operation | movement at the time of warm-up. It is explanatory drawing which shows the time-dependent change of the temperature which each temperature sensor detected. It is explanatory drawing of the conventional adhesive agent accommodating part.

Explanation of symbols

A Image forming apparatus B Bookbinding apparatus 61 Storage section heater 62 Application roller 63 Adhesive 64 Adhesive storage section 101, 201 CPU
611 Housing temperature sensor 621 Roller heater 622 Roller temperature sensor 631 Adhesive temperature sensor

Claims (10)

A bookbinding apparatus that stacks a plurality of sheets to generate a sheet bundle, and binds the sheet bundle and a cover sheet with an adhesive,
An adhesive container for containing the molten adhesive;
Application means for applying the adhesive contained in the adhesive containing part to one end side of the sheet bundle,
A container heater installed in the adhesive container for heating the adhesive;
An application means heater installed in the application means for heating the adhesive;
A first temperature sensor for detecting the temperature of the housing heater;
A second temperature sensor for detecting the temperature of the application means heater;
A third temperature sensor for detecting the temperature of the adhesive contained in the adhesive containing part;
When the temperature of the adhesive detected by the third temperature sensor does not reach a predetermined temperature, the container heater is controlled based on the first warm-up temperature and the application means heater based on the second warm-up temperature When the temperature of the adhesive detected by the third temperature sensor reaches a predetermined temperature, the container heater is controlled based on a first operating temperature lower than the first warm-up temperature and Control means for controlling the application means heater based on a second operating temperature lower than a second warm-up temperature;
A bookbinding apparatus comprising: The application means is an application roller;
A drive unit for rotating the application roller;
Drive unit control means for controlling the drive unit to rotate the application roller when the temperature of the adhesive detected by the third temperature sensor reaches a predetermined temperature;
The bookbinding apparatus according to claim 1, further comprising: The bookbinding apparatus according to claim 1 or 2, wherein the predetermined temperature is set within a range of 150 to 200 ° C. 4. The bookbinding apparatus according to claim 1, wherein the first warm-up temperature and the second warm-up temperature are set within a range of 160 to 210 ° C. 5. 5. The bookbinding apparatus according to claim 1, wherein the first operating temperature and the second operating temperature are set in a range of 150 to 200 ° C. 6. An image forming unit for forming an image on a sheet;
A bookbinding unit that stacks a plurality of sheets imaged by the image forming unit to generate a sheet bundle, and binds the sheet bundle and a cover with an adhesive;
An image forming system comprising:
An adhesive container for containing the molten adhesive;
Application means for applying the adhesive contained in the adhesive containing part to one end side of the sheet bundle,
A container heater installed in the adhesive container for heating the adhesive;
An application means heater installed in the application means for heating the adhesive;
A first temperature sensor for detecting the temperature of the housing heater;
A second temperature sensor for detecting the temperature of the application means heater;
A third temperature sensor for detecting the temperature of the adhesive contained in the adhesive containing part;
When the temperature of the adhesive detected by the third temperature sensor does not reach a predetermined temperature, the container heater is controlled based on the first warm-up temperature and the application means heater based on the second warm-up temperature When the temperature of the adhesive detected by the third temperature sensor reaches a predetermined temperature, the container heater is controlled based on a first operating temperature lower than the first warm-up temperature and Control means for controlling the application means heater based on a second operating temperature lower than a second warm-up temperature;
An image forming system comprising: The application means is an application roller;
A drive unit for rotating the application roller;
Drive unit control means for controlling the drive unit to rotate the application roller when the temperature of the adhesive detected by the third temperature sensor reaches a predetermined temperature;
The image forming system according to claim 6, further comprising: The image forming system according to claim 6 or 7, wherein the predetermined temperature is set within a range of 150 to 200 ° C. 9. The image forming system according to claim 6, wherein the first warm-up temperature and the second warm-up temperature are set in a range of 160 to 210 ° C. 9. 10. The image forming system according to claim 6, wherein the first operating temperature and the second operating temperature are set in a range of 150 to 200 ° C. 10.

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