JP5476577B2 - Glue inspection device - Google Patents

Description

  The present invention is a gluing method in which a back surface is glued and conveyed in a gluing unit of a wireless binding machine, and a gluing state is inspected before a cover is affixed to a text on which a cover is affixed after that. It relates to an inspection device.

  Conventionally, in a wireless binding machine, a text composed of signatures collated by a collating machine is fixed by a clamper, and then the back of the text is cut by a cutting cutter, and then transferred by a roller or sprayed by a nozzle. The glue is applied, and then a cover is pasted and bookbinding is performed.

  Hot melt is used as the paste, but in recent years, PUR (polyurethane reactive hot melt), which is a urethane hot melt, has become the mainstream.

  The conventional wireless binding machine does not particularly check the glued state. This is because when the pasting state is defective, the cover is not pasted, and the defect can be detected at that time. When the glue is transferred by a roller, the state of the glue on the back of the text can be determined by observing the status of the glue attached to the roller before being transferred to the text or the amount of glue in the glue pot in which the roller is immersed. It is because it can guess.

  However, in recent years, the application of glue with a nozzle has been performed, and it has become difficult to estimate the state of gluing from the observation of the nozzle. Further, even when a defect occurs, the glue is not applied at all, and a defect such that the glue is not partially applied tends to occur. In the case of such a partial application failure, there is a problem that after the cover is pasted and bookbinding is completed, the failure is detected and returned.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a gluing inspection apparatus that can quickly detect a gluing failure and can also detect a partial application failure.

In order to achieve the above-mentioned object, the invention according to claim 1 of the present invention is directed to the text in which the back surface is glued and conveyed in the gluing portion of the wireless binding machine, and then the cover is pasted in the cover pasting portion. , A gluing inspection device for inspecting the gluing state,
A non-contact detection sensor that is disposed between the pasting part and the cover sticking part of the wireless binding machine and detects the pasting state of the back of the text in a non-contact manner;
A control unit that receives a signal from the non-contact detection sensor and generates an alarm signal when the pasting state is defective,
By detecting the arrival of the text, the inspection start position detecting sensor for detecting that the body is transported to a predetermined inspection start position,
An inspection end position detection sensor for detecting that the text has been transported to a predetermined inspection end position by detecting passage of the text; and
Inspection start position detecting sensor and the inspection end position detection sensor is adjustable in position disposed downstream and upstream of the non-contact sensor, respectively,
The control unit starts processing a signal from the non-contact detection sensor based on a detection signal from the inspection start position detection sensor disposed on the downstream side, and detects a detection signal from the inspection end position detection sensor disposed on the upstream side. The processing is terminated based on the above.

  The invention according to claim 2 is characterized in that the non-contact detection sensor according to claim 1 is a radiation temperature sensor for detecting the temperature of the back side of the text.

  The invention according to claim 3 is characterized in that the control unit according to claim 2 generates an alarm signal when the temperature detected by the radiation temperature sensor is lower than a predetermined threshold value.

According to the present invention, with respect to body passing through the gluing process in the gluing unit of the wireless binding machine, the non-contact inspection Dese capacitors for detecting a glued state of the back in a non-contact gluing unit and cover of the wireless binding machine By disposing it between the pasting unit, it becomes possible to detect a pasting failure before the cover is pasted, and it is possible to take quick measures based on an alarm signal from the control unit. It becomes like this.

  The back side just after the gluing process has a high temperature in the part where the glue is applied, and the low temperature in the part where the glue is not applied. By comparing with a predetermined threshold value, the pasting state can be detected in a non-contact manner. By continuously measuring the temperature of the back side of the text being conveyed, partial application defects can also be detected.

By providing the inspection start position detecting sensor and the inspection end position detection sensor, it is possible to detect the glue state in the proper range for body being conveyed.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In FIG. 1, a gluing inspection device 30 according to the present invention is disposed between a gluing portion 16 and a cover sticking portion 18 in the wireless binding machine 10.

  That is, the wireless binding machine 10 conveys the text 20 composed of the signatures collated by the collating machine disposed upstream thereof, and carries the back cutting unit 14, the pasting unit 16, and the cover pasting unit 18. To move sequentially. More specifically, the text 20 is held by a clamper 12 as shown in FIG. The clamper 12 is attached to an endless chain as a transport means at a predetermined interval, and is transported by the chain to circulate in the wireless binding machine 10, and the back surface of the body 20 protrudes downward from the clamper 12. The body 20 is tightened as described above.

  The back cutting unit 14 of the wireless binding machine 10 cuts the back of the text with a cutting cutter to align the back, and the gluing unit 16 pastes the back of the text. As the gluing means, either the nozzle 16a or the roller 16b can be used, and the gluing is applied by spraying by the nozzle 16a or transfer by the roller 16b. Further, a cover 22 is pasted on the glued back surface in the cover pasting unit 18.

  The gluing inspection device 30 includes a base 32 disposed immediately below the conveyance path of the clamper 12 (see FIG. 2) at a point downstream of the gluing unit 16 and upstream of the cover sticking unit 18.

  As shown in FIGS. 2 to 4, a vertically extending column 34 is fixed to the base 32, and a parallel shaft 36 extending in parallel to the conveyance line direction and horizontally is fixed to the upper portion of the column 34. A downstream slider 38 and an upstream slider 40 are slidably attached to the parallel shaft 36 at an interval in the front-rear direction in the conveyance line direction. Each slider 38 and 40 is further provided with an orthogonal shaft 42 that is orthogonal to the conveyance line direction and extends horizontally. A position detection sensor is attached to each orthogonal shaft 42 via a pair of attachment brackets 44, 44. The position detection sensors attached to the downstream slider 38 side are inspection start position detection sensor pairs 46 and 48, and the position detection sensors attached to the upstream slider 40 side are inspection end position detection sensor pairs 50 and 52. is there.

  The inspection start position detection sensor pair includes a light emitter 46 and a light receiver 48. Similarly, the inspection end position detection sensor pair includes a light emitter 50 and a light receiver 52, and the light emitter and the light receiver sandwich the conveyance line. Opposed to each other.

  The mounting bracket 44 is preferably arranged at an angle with respect to the parallel shaft 36, the downstream mounting bracket 44 tilts upstream and the upstream mounting bracket 44 tilts downstream, The inspection start position detection sensor pair 46, 48 and the inspection end position detection sensor pair 50, 52 are accessible by sliding of the sliders 38, 40.

  The detection heights of the inspection start position detection sensor pair 46 and 48 and the inspection end position detection sensor pair 50 and 52 coincide with the height of the protruding portion of the body 20 that is conveyed by the clamper 12 and protrudes from the clamper 12. The light emitters 46 and 50 project light beams, and the light receivers 48 and 52 receive the light beams.

  Further, a non-contact detection sensor 62 is attached to the base 32 via an adjustment stage 60. As the non-contact detection sensor 62, it is preferable to use a radiation temperature sensor capable of measuring the temperature in a non-contact manner. The radiation temperature sensor 62 detects infrared energy radiated from an object to be detected depending on the temperature, thereby converting it into temperature.

  Two laser pointers are further emitted from the non-contact detection sensor 62 so that the detection range is displayed.

  A non-contact detection sensor 62 is attached to the adjustment surface 60a of the adjustment stage 60 via a bracket 61. By adjusting the adjustment dials 60b and 60c, the adjustment surface 60a has a direction and a height orthogonal to the conveyance line, that is, The position can be adjusted in two vertical axes. By adjusting the position of the adjustment surface 60a in the direction orthogonal to the conveyance line, the non-contact detection sensor 62 is adjusted so as to be positioned at the center portion in the thickness direction on the back surface of the text. Further, by adjusting the position of the adjustment surface 60a in the height direction, as shown in FIG. 5, the detection range by the laser pointers 62a and 62a of the non-contact detection sensor 62 is adjusted to correspond to the thickness of the text. .

  The inspection start position detection sensor pair 46, 48, the inspection end position detection sensor pair 50, 52, and the non-contact detection sensor 62 are each connected to a control unit 64 that is a sequencer.

  As shown in FIG. 6, the control unit 64 is input with detection signals from the inspection start position detection sensor and the inspection end position detection sensor, and performs inspection start / end means 65 for controlling the start and end of the inspection, and non-contact detection. A bottom hold unit 66 for performing a bottom hold on the detection signal from the sensor 62 and a comparison unit 68 for comparing an output value from the bottom hold unit with a predetermined threshold value are included.

The control unit 64 performs the inspection according to the following procedure.
When body passing through the gluing process with the gluing unit 16 is transported by the clamper 12, first, the light is blocked in the light receiver 52 of the inspection end position detection sensor pair, then the inspection start position detecting sensor pair photodetector 48 The light is blocked at. When the light is blocked in the light receiver 48, it is determined that the text 20 has reached a predetermined inspection start position, and the inspection start / end unit 65 causes the bottom hold means 66 and the comparison means 68 to start operating, Processing of the signal detected by the non-contact detection sensor 62 is started. The non-contact detection sensor 62 faces the back surface of the body 20 to be conveyed and sequentially detects the temperature of the back surface, and the detection signal is sent to the bottom hold means 66 as a voltage signal. The non-contact detection sensor 62 outputs a detection signal corresponding to the temperature averaged in the thickness direction. The bottom hold means 66 detects the minimum value of the detection signal, and the comparison means 68 compares the detected minimum value with a predetermined threshold value.

  When the paste is properly applied, the back surface of the main body 20 has a temperature of about 100 ° C. due to the heated paste. On the other hand, the region where the paste is not properly applied has a temperature of about 40 to 50 ° C. Therefore, by setting the predetermined threshold to a value corresponding to a temperature between 100 ° C. and 40-50 ° C., the comparison means 68 outputs an alarm signal when the minimum value is smaller than the predetermined threshold. The alarm signal is for processing such as driving the alarm sound generating means to generate an alarm sound, stopping the driving means of the conveying means to stop the conveyance of the text 20, or discharging the corresponding text 20 Can be used as a trigger signal.

  As an example of the gluing failure, as shown in FIG. 7A, there is an example in which a paste application portion 20a and a non-application portion 20b are periodically repeated. In this case, the detection signal is as shown in FIG. 7 (b), and periodically rises and falls, and the output level from the bottom hold means 66 becomes smaller than a predetermined threshold as shown in FIG. 7 (c). As shown in FIG. 7D, an alarm signal can be output.

When light is detected again in the light receiver 52 of the inspection end position detection sensor pair, it is determined that the body 20 has reached a predetermined inspection end position, the bottom hold means 66 and comparing means by the inspection start and end unit 65 68 stops operating and the bottom hold means 66 is reset.

  In this way, the pasting inspection device 30 can detect a pasting failure of the body 20 before the cover is pasted, and can quickly deal with it. Further, partial application defects can be detected.

  The positions along the conveyance line of the inspection start position detection sensor pair 46 and 48 and the inspection end position detection sensor pair 50 and 52 can be adjusted by sliding the sliders 38 and 40 along the parallel shaft 36. . When the leading end of the body 20 passes the light beam of the inspection start position detection sensor pair 46, 48, the non-contact detection sensor 62 starts detection, and the tail end of the body 20 is the light of the inspection end position detection sensor pair 50, 52. When the beam passes, the non-contact detection sensor 62 ends the detection, and the detection range by the non-contact detection sensor 62 is a portion excluding the vicinity of the head end and the vicinity of the tail of the text 20. A portion near the head end and a portion near the tail of the body 20 correspond to a portion 20c (FIG. 7A) that is later cut off by a three-way cutting machine. Therefore, the positions of the inspection start position detection sensor pairs 46 and 48 and the inspection end position detection sensor pairs 50 and 52 may be adjusted with respect to the non-contact detection sensor 62 corresponding to the cut-off portion 20c.

  In the above embodiment, the radiation temperature sensor is used as the non-contact detection sensor 62. However, the present invention is not limited to this, and a gloss sensor that detects glue gloss and a distance sensor that detects glue thickness may be used. Is possible.

It is a schematic explanatory drawing of the wireless binding machine containing the glue test | inspection apparatus by this invention. It is a perspective view of the pasting inspection device by the present invention. It is a side view of the gluing inspection apparatus of FIG. It is the figure seen from the downstream of the gluing test | inspection apparatus of FIG. It is the figure seen from the downstream side showing the relationship between a non-contact detection sensor and the text. It is a block diagram of a control part. (A) the state of the back of the text when a gluing failure occurs, (b) an example of the detection signal, (c) the output level from the bottom hold means, and (d) the alarm signal from the comparison means. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Wireless binding machine 16 Gluing part 18 Cover sticking part 20 Body 30 Gluing inspection apparatus 46, 48 Inspection start position detection sensor 50, 52 Inspection end position detection sensor 62 Non-contact detection sensor 64 Control part

Claims (3)

A gluing inspection device that inspects the gluing state of a body on which a back surface is glued and conveyed in a gluing unit of a wireless binding machine and then a cover is pasted in a cover pasting unit,
A non-contact detection sensor that is disposed between the pasting part and the cover sticking part of the wireless binding machine and detects the pasting state of the back of the text in a non-contact manner;
A control unit that receives a signal from the non-contact detection sensor and generates an alarm signal when the pasting state is defective,
By detecting the arrival of the text, the inspection start position detecting sensor for detecting that the body is transported to a predetermined inspection start position,
An inspection end position detection sensor for detecting that the text has been transported to a predetermined inspection end position by detecting passage of the text; and
Inspection start position detecting sensor and the inspection end position detection sensor is adjustable in position disposed downstream and upstream of the non-contact sensor, respectively,
The control unit starts processing a signal from the non-contact detection sensor based on a detection signal from the inspection start position detection sensor disposed on the downstream side, and detects a detection signal from the inspection end position detection sensor disposed on the upstream side. The gluing inspection apparatus is characterized in that the processing is terminated based on the above.   The gluing inspection apparatus according to claim 1, wherein the non-contact detection sensor is a radiation temperature sensor that detects a temperature of a back surface of the text.   The gluing inspection apparatus according to claim 2, wherein the control unit generates an alarm signal when a temperature detected by the radiation temperature sensor is lower than a predetermined threshold.

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