JP2007144923A - Sizing bookbinding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problematic point such as the dangerous development of indefinite supplying of heat in a sizing bookbinding device due to no sending of signal to control a heater as a heat source when a means for detecting a temperature is poor. <P>SOLUTION: In this sizing bookbinding device, minute discrimination of poor parts can be possible advantageous in cost without impairing safety by judging whether a sensor is abnormal or a heater is abnormal from the output values of a temperature sensor for an adhesive tank and of a sensor for the temperature on the liquid level of a molten adhesive. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a glue binding apparatus that controls the amount of glue applied to a spine.

  In a gluing bookbinding apparatus or the like, there is a method of binding an adhesive in a liquid state. A solid hot melt is widely used as an adhesive member. However, in order to use it as an adhesive, it is necessary to melt it with heat. In order to control the melting point temperature at which the solid is melted, a temperature sensor and a temperature control means for controlling the temperature are provided inside the adhesive tank. Generally it is provided.

  For example, in Patent Document 1, an electromagnetic induction coil is used as a heat source for melting the adhesive, and a thermocouple system is used as a means for controlling the temperature. In this method, the adhesive is consumed, and the liquid level drops below the thermocouple, so that a signal indicating that the detected temperature is equal to or lower than a predetermined value is transmitted to the control unit that is the control means. Upon receiving this signal, the control unit operates the adhesive supply unit to replenish the adhesive.

Further, for example, in Patent Document 2, a paste storage container that contains glue and has an opening, container mounting means for installing the paste storage container at a predetermined position, a supply pipe that transfers glue discharged from the opening, and a supply Glue discharging means for discharging the glue connected to the tube from the nozzle tip, a temperature sensor and heating means installed in the vicinity of the glue container, and the temperature sensor being below a predetermined temperature set in advance. A paste applying apparatus having a control means for driving the power source of the heating means when the temperature is detected and heating the glue storage container by the heating means is described.
JP 2005-178187 A JP 2002-177847 A

  However, if the means for detecting the temperature is defective, a signal for controlling the heater, which is a heat source, is not transmitted, and it is dangerous because heat is supplied forever.

  In any of the above patent documents, no countermeasures for sensor abnormality are specified, and the problem has not been solved.

  An object of the present invention is to determine whether a sensor abnormality or a heater abnormality is based on an output value of an adhesive tank temperature sensor and a molten adhesive liquid surface temperature sensor, which is advantageous in terms of cost and does not impair safety and has a defective part. It is an object of the present invention to provide a gluing bookbinding apparatus capable of finely distinguishing.

The above object can be achieved by the following constitution.
1. A first temperature sensor disposed in an adhesive tank for accumulating a heat-meltable adhesive, and a first temperature control means for controlling the temperature based on a temperature detection signal of the first temperature sensor;
A second temperature sensor disposed in the vicinity of the melted liquid surface of the adhesive; a second temperature control means for controlling the temperature by a temperature detection signal of the second temperature sensor;
A heater for heating the adhesive tank;
In a gluing bookbinding apparatus having
If the information of the first temperature sensor does not converge to the control temperature after a predetermined time, refer to the second temperature sensor information, and if the second temperature sensor information substantially matches the control temperature, A gluing bookbinding apparatus comprising control means for performing a control that makes the first temperature sensor abnormal.
2. The control unit performs control that makes the heat source abnormal when both the first temperature sensor information and the second temperature sensor information do not converge to the first control temperature. The gluing bookbinding apparatus described in 1.

According to the present invention, the first temperature sensor disposed in the adhesive tank for accumulating the heat-meltable adhesive, the first temperature control means for controlling the temperature by the temperature detection signal, and the melted A second temperature sensor disposed in the vicinity of the liquid surface of the adhesive; second temperature control means for controlling the temperature based on a temperature detection signal of the second temperature sensor; and a heater for heating the adhesive tank. In the gluing bookbinding device,
When the information of the first temperature sensor does not converge to the control temperature after a predetermined time, the second temperature sensor information is referred to, and when the second temperature sensor information substantially matches the control temperature, If the temperature sensor is abnormal, and both the first temperature sensor information and the second temperature sensor information do not converge to the first control temperature, by having a control means for performing control that makes the heat source abnormal, It is possible to provide a gluing bookbinding apparatus capable of finely identifying defective parts without diverting costs by diverting existing parts.

  Embodiments according to the present invention will be described below, but the present invention is not limited to the embodiments.

  FIG. 1 is a diagram showing an entire bookbinding apparatus according to an embodiment of the present invention.

<Bookbinding device>
The bookbinding apparatus B stacks the paper S1 discharged from the image forming apparatus (not shown) to the paper discharge tray 20 or the paper reversing unit 40, and the paper S1 fed one by one from the paper reversing unit 40. The stacking unit 50, the application unit 60, a cover storage unit 80 for storing the cover S2, a cover support unit 90 for supporting the cover, and a book discharge unit 100 for stacking books on which the cover and the paper are joined are provided.

  The sheet S1 discharged from the image forming apparatus is discharged to a discharge tray 20 through a discharge path 12 by a switching gate 11 provided in the transfer unit 10, or is transferred to a sheet reversing unit 40 that switches back the sheet. . The sheet S1 is discharged to the discharge tray 20 when not in the bookbinding processing mode.

  The sheet S <b> 1 is conveyed to the sheet reversing unit 40 through the conveying path 13, switched back in the sheet reversing unit 40, and then conveyed to the stacking unit 50. In the stacking unit 50, a set number of sheets S1 are stacked, and the stacking unit 50 is nipped and rotated when the set number of sheets is stacked to hold the bundle of sheets S1 in a substantially vertical state.

  An adhesive is applied to the back surface (lower end surface in FIG. 1) of the paper S <b> 1 held by the stacking unit 50 in a vertical state by the application unit 60.

  A cover sheet S2 comes into contact with and adheres to a bundle of sheets S1 coated with adhesive, and a book S3 is created and discharged to the book discharge unit 100.

  In the following description, the main constituent paper is referred to as S1, the cover paper is referred to as S2, and the book as a booklet in which the cover paper is bonded to the main constituent paper is referred to as book S3.

  The series of operations is controlled by a control unit (not shown) included in the gluing bookbinding apparatus. The same applies to the following unless otherwise specified.

  Hereinafter, each part of the bookbinding apparatus will be described in detail.

  The sheet S1 conveyed through the conveying path 13 is discharged by the paper discharge roller 14, conveyed by the swinging pressure contact roller 401, and after ascending the inclined reversing plate 402, the swinging pressure contact roller 401 reversely rotates and moves down the sheet S1. Transport to. The sheet S1 transported downward falls to the stacking unit 50 and accumulates.

  The sheet S1 descending the sheet reversing unit 40 is supported in the stacking unit 50 in a tilted state by a sheet support unit including a support plate 502 and a receiving plate 506.

  The sheets S1 sequentially discharged from the image forming apparatus are stacked on the stacking unit 50, and a bundle of sheets S1 is formed. The number of sheets S1 that form a bundle includes the number of documents counted using an automatic document feeder mounted on the image forming apparatus, and the number of documents obtained from document image information transmitted via a personal computer or the like. It is grasped from the number of originals inputted in advance by the operator.

  Reference numeral 504 denotes a member that suppresses the floating of the stacked sheets S1 and suppresses the sheet S1 by contacting and separating each time one sheet S1 is supplied to the stacking unit 50. Reference numeral 505 denotes an alignment plate for aligning the side edges of the paper.

  When the set number of sheets S1 are stacked on the stacking unit 50, the holding plate 503 is operated to hold the bundle of sheets S1.

  The stacking unit 50 rotates around the shaft 501 while holding the bundle of sheets S1 to change the bundle of sheets S1 from the inclined state to the vertical state.

<Application process>
FIG. 2 shows a process of holding a bundle of sheets S1 in a vertical state on the stacking unit 50 and applying an adhesive.

  Before showing the coating process, the holding of the sheet by the holding plate 503 will be described with reference to FIG.

  The holding plate 503 is moved by driving the motor M4, presses the bundle of the sheets S1, detects that the driving torque due to the pressing has reached a predetermined value, and stops, whereby the bundle of the sheets S1 becomes the support plate 502. And firmly held by the holding plate 503. The stop position of the holding plate 503 is detected by the encoder 509 and stored in the storage device of the position detection unit 511.

  In a state where the bundle of sheets S1 is held, the receiving plate 506 rotates 90 ° and retracts as shown in FIG.

  In the state of FIG. 2C, the lower surface SA of the bundle of sheets S <b> 1 (referred to as the sheet bundle lower surface SA) is separated from the gluing roller 601.

  Next, as shown in FIG. 2 (d), the application means 60 in which the hot melt adhesive AD is accommodated is raised by the drive of the motor M2, and the gluing roller 601 comes into contact with the lower surface of the bundle of sheets S1. The gluing roller 601 moves in a direction perpendicular to the paper surface of FIG. 2 to apply the hot melt adhesive AD to the paper bundle lower surface SA.

<Application means>
3 is a plan view of the application unit 60 as viewed from above, FIG. 4 is a cross-sectional view taken along the line YY of FIG. 3, and FIG. 5 is a perspective view of the application unit 60. FIG. 6 is a view showing a place where the first temperature sensor and the second temperature sensor are attached, and is shown by a section XX in FIG.

  In FIG. 3, reference numeral 67 denotes a belt for sliding the application means 60, and one position of the belt 67 is fixed to one position of the slide rail 608 via the coupling member 612.

  The belt 67 is stretched around pulleys 613 and 614 provided in parallel with the slide rail 608, and driving is transmitted to the pulley 614 from the moving motor M <b> 3.

  In FIG. 4, reference numeral 604 denotes a leveling roller for uniformizing the hot melt adhesive AD applied to the sheet bundle lower surface SA, and a gear G1 is fixed to the rotary shaft 604A.

  Similarly, reference numeral 618 denotes a restricting plate for restricting the amount of hot melt adhesive AD carried on the gluing roller 601, and is installed at a certain interval with respect to the gluing roller 601. Reference numeral 619 denotes a removing plate for removing the hot melt adhesive AD attached to the leveling roller 604, and is in contact with the leveling roller 604 with a constant pressure.

  The rotational drive of the gluing roller 601 and the leveling roller 604 is supplied from the motor M1, and the rotation direction is set to be the same as the traveling direction of the coating means 60.

  Reference numeral 602 denotes an adhesive tank that stores molten hot-melt adhesive, and includes a heater 603 that heats from the lower outside of the adhesive tank 602.

  As shown in FIG. 5, a timing belt is attached to the output shaft of the motor M1 via a timing pulley so as to rotate a stepped gear G4. The gear G3 fixed to the rotating shaft of the leveling roller 604 and the gear G1 fixed to the rotating shaft of the leveling roller 604 are engaged with each other, and the gluing roller 601 and the leveling roller 604 are rotated by the rotational driving of the motor M1.

  In FIG. 6, on the inner bottom surface of the adhesive tank 602, the heater AD is turned on / off based on the first temperature sensor TS1 and the temperature detection signal from the temperature sensor TS1, and the adhesive AD in the adhesive tank 602 is placed. There is provided first temperature control means TC1 for controlling the temperature.

  Further, in the vicinity of the molten adhesive liquid surface, a second temperature sensor TS2 and second temperature control means TC2 for controlling the temperature based on a temperature detection signal from the second temperature sensor TS2 are provided.

  The second temperature control means TC2 replenishes the adhesive AD when the temperature of the molten adhesive liquid surface position is separated from the second temperature sensor TS2 and becomes a predetermined temperature as the adhesive is consumed. To be controlled.

<Sensor abnormality judgment>
Here, sensor abnormality determination which is an object of the present invention will be described.

The temperature detected by the first temperature sensor is a ° C., and the control temperature of the first temperature is b ° C. Further, when the temperature detected by the second temperature sensor is c ° C., even if a predetermined time has elapsed, a ° ≠ b ° C. and c ° ≈b ° C.
It is determined that the first temperature sensor is abnormal.
When a ° C ≠ b ° C and c ° C ≠ b ° C,
Judged as heater abnormality.

  Note that the above determination is made by a controller included in the bookbinding apparatus.

  This apparatus having such control means can easily detect and determine whether the sensor member is abnormal or the heater member is abnormal depending on the detected temperature.

<Jointing process>
Next, a process for joining the bundle of sheets S1 and the cover sheet S2 will be described with reference to FIGS.

  FIG. 7 is a schematic cross-sectional view of the cover storage unit 80 that stores the cover S2 and the cover support unit 90 that supports the cover. FIG. 8 is a schematic perspective view of the cover support unit 90 viewed from the direction A in FIG.

  As shown in FIG. 7, the cover sheet S 2 is stored in a sheet feed tray 801 of a cover sheet storing unit 80 provided at the lower part of the bookbinding apparatus, fed by a sheet feeding / conveying roller 82, and aligned by a cover sheet supporting unit 90. After that, the sheet is switched back and cut to a length corresponding to the bundle of sheets S1 by a cutter 81 serving as a cutting unit, conveyed by a conveyance roller 84, and placed horizontally on a cover sheet support unit 901 indicated by a one-dot chain line. Is done. The cover sheet support means 901 is composed of a plurality of members such as pressing members 91 and 92 and cams 93 and 94 for driving the pressing members 91 and 92.

  The cutter 81 cuts the cover sheet S2 to a length based on the information on the size of the cover sheet S2, the information on the size of the sheet S1, and the information on the thickness of the bundle of sheets S1 stored in the position detection unit 511. Further, the chips of the cover sheet S2 are stored in the storage box 83.

  The cover sheet S2 cut to a predetermined length is fed out by the transport roller 84 and inserted between the upper guide plate 955 and the lower guide plate 956 having a gap of about 5 mm. The cover sheet S2 is transported by a cover sheet transport roller 951 and a driven roller 952 provided at the front ends of the cover sheet pressing members 95 and 96. The cover S2 is controlled to stop when it reaches a predetermined position based on the information on the size of the cover S2 and the information on the thickness of the bundle of sheets S1. Further, the cover pressing member 97 enters under the cover and lifts the cover.

  9A is a top view of the cover sheet support unit 901, and FIG. 9B is a cross-sectional view taken along the line CC.

  The belts 98 </ b> A and 98 </ b> B perform an alignment operation for correcting the inclination of the conveyed cover sheet S <b> 2 and the operation for transporting the bookbinding book S <b> 3 to the book discharging unit 100.

  As alignment means for the cover sheet S2, alignment members 981A and 981B for aligning both end faces in the direction parallel to the transport direction of the cover sheet S2 are provided, and drum-shaped rollers for stretching the belts 98A and 98B are attached to the alignment members 981A and 981B. It has been. The alignment members 981A and 981B perform the alignment operation every time the cover sheet S2 is conveyed. Further, when a cover supporting member 901 described later rises, the alignment members 981A and 981B and the belts 98A and 98B are retracted to the positions indicated by the two-dot chain line in FIG.

  FIG. 10 is a view showing a state in which the cover sheet S2 is pressed by the pressing members 95 and 96 and is lifted by the motor M10 that drives the belts 99A and 99B (first moving means) together with the cover sheet supporting member 901.

  FIG. 10A shows a state where the application of the hot melt adhesive AD is completed. In the state of FIG. 10A, the cover sheet support means 901 supports the cover sheet S2 at a lower position away from the lower surface of the bundle of sheets S1, as shown in FIG.

  When the cover supporting means 901 is raised, the cover pressing members 95 and 96 hold the cover S2 from above, and hold the cover S2 in a flat state. When the cover sheet S2 rises and contacts the SA surface of the bundle of sheets S1, the cover pressing members 95, 96, and 97 are released from being pressed by a motor (not shown), and the state shown in FIG. At this time, the cover sheet S2 is lifted by the cover sheet pressing member 97 that has entered under the cover sheet S2.

  The cover sheet support means 901 is further raised by several mm from the position shown in FIG. The position raised several millimeters is the position shown in FIG. After the ascent, the pressing members 91 and 92 press the cover S2 from the left and right to give corners to the boundary between the spine and the front cover and the boundary between the spine and the back cover, and the cover S2 is brought into close contact with the paper S1 and the book S3. Is formed. The time during which the pressing members 91 and 92 are pressing is approximately 5 seconds, and the pressing force is approximately 200 Nf.

  Moreover, the moving means of the pressing members 91 and 92 in the left-right direction is performed by cams 93 and 94 (see FIG. 9) driven by a motor (not shown). The pressing members 91 and 92 may be moved by providing a rack for each member and moving by rotation of a pinion meshing with the rack.

  The processing of the cover sheet S2 after joining the cover sheet S2 will be described with reference to FIG.

  When the joining of the cover sheet S2 is completed, the pressing members 91 and 92 are released, and as shown in FIG. 11A, the cover sheet supporting means 901 is lowered by about 100 mm by the driving of the belts 99A and 99B and returns to the home position. At this time, in order to lift the left and right cover sheets S2 by about 50 mm, as shown in FIG. 11B, the cover sheet pressing members 95, 96, and 97 once turn from the vertical state to the horizontal state and rotate counterclockwise again, and the cover lifting member 971 also rises. Let

  Subsequently, the belts 98A and 98B are moved back to a position narrower than the width of the cover sheet S2, and the cover sheet supporting means 901 is raised by about 70 mm.

  The holding plate 503 moves to the retracted position and releases the pressure. As a result, the book S3 including the bundle of sheets S1 and the cover sheet S2 falls on the belts 98A and 98B. While lowering the cover supporting means 901 again, the belts 98A and 98B are rotated, and the book S3 is pushed down while being sent to the book discharge unit 100 side. At this time, as shown in FIG. 11C, the cover sheet pressing members 96 and 97 are largely rotated in the upward direction to lift the left cover sheet. When the cover sheet supporting means 901 reaches the home position (FIG. 11 (d)), the book S3 is sent to the left end by the belts 98A and 98B and is discharged to the book discharge section 100 as it is.

  The sheet discharge table 101 is moved up and down by belt driving, the sheet discharge table 101 on which the book S3 is placed is lowered, the book S3 is transferred to the belt 102, and the book S3 is conveyed by the belt 102 and discharged from the bookbinding apparatus. .

<Flow diagram>
FIG. 12 is an operation flowchart of the adhesive tank temperature control using the first temperature sensor and the first temperature control means.

  Temperature control is started (step S01) and it is determined whether the first temperature sensor is at the control temperature (step S02). When the temperature is lower than the control temperature, the heater is turned on (step S03). When the temperature is higher than the control temperature, the heater is turned off (step S04).

  FIG. 13 is a flowchart relating to adhesive supply control using the second temperature sensor and the second temperature control means.

  Adhesive supply control is started (step S11), it is determined whether or not the warm-up time of the adhesive tank has been completed (step S12), and if completed, it is determined whether or not the second temperature sensor is higher than the control temperature (step S12). If it is high (step S14), if it is low, it is determined whether or not replenishment is performed (step S15). If replenishment is necessary, the adhesive is replenished (steps S16 and S17).

  Furthermore, in FIG. 14, the flowchart of adhesive replenishment control and temperature control is shown.

  In the abnormality detection control start step (step S21), it is determined whether the first temperature sensor (adhesive temperature sensor) has an abnormal temperature (step S22). Make a decision. If step S23 is YES, it is determined whether or not the second temperature sensor (replenishment sensor) has an abnormal temperature (step S24). If step S23 is YES, the heater is abnormal (step S25), and if step S24 is NO, the first temperature sensor is determined to be abnormal (step S26), and the process ends (step S27).

Here, the control temperature of the first temperature sensor: 180 ° C.
Abnormal temperature: 0 ° C. or lower or 200 ° C. or higher Second temperature sensor control temperature: 160 ° C.
Abnormal temperature: set to 0 ° C. or lower or 180 ° C. or higher.

It is a front view of the bookbinding apparatus concerning an embodiment of the invention. It is a figure which shows the application | coating process of an adhesive agent. It is the top view which looked at the application means from the upper part. It is YY sectional drawing of FIG. It is a perspective view of an application means. It is XX sectional drawing of FIG. It is a schematic sectional drawing regarding the cover cover support part which supports a cover storage part and a cover. It is the schematic perspective view which looked at the cover support part from the A direction of FIG. FIG. 9A is a top view of the cover sheet supporting means, and FIG. 9B is a cross-sectional view taken along the line CC in FIG. 9A. It is a figure which shows the place which joins a cover paper to this structure paper. It is a figure explaining the process of the cover after joining. It is an operation | movement flowchart of the adhesive agent tank temperature control using a 1st temperature sensor and a 1st temperature control means. It is a flowchart regarding the adhesive replenishment control using the 2nd temperature sensor and the 2nd temperature control means. The flowchart which shows adhesive supply control and temperature control is shown.

Explanation of symbols

B bookbinding apparatus 50 stacking unit 60 applying means 601 gluing roller 602 adhesive tank 604 leveling roller S1 paper S2 cover S3 book SA bottom face of paper bundle TS1 first temperature sensor TS2 second temperature sensor TC1 first temperature control means TC2 Second temperature control means

Claims (2)

A first temperature sensor disposed in an adhesive tank for accumulating a heat-meltable adhesive, and a first temperature control means for controlling the temperature based on a temperature detection signal of the first temperature sensor;
A second temperature sensor disposed in the vicinity of the melted liquid surface of the adhesive; a second temperature control means for controlling the temperature by a temperature detection signal of the second temperature sensor;
A heater for heating the adhesive tank;
In a gluing bookbinding apparatus having
If the information of the first temperature sensor does not converge to the control temperature after a predetermined time, refer to the second temperature sensor information, and if the second temperature sensor information substantially matches the control temperature, A gluing bookbinding apparatus comprising control means for performing a control that makes the first temperature sensor abnormal. The control means for performing control that makes the heat source abnormal when both of the first temperature sensor information and the second temperature sensor information do not converge to the first control temperature. Item 4. The glue binding apparatus according to item 1.

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