JP4531619B2 - Envelope glued part inspection device - Google Patents

Description

  The present invention relates to an envelope glued part inspection device for inspecting the application state of glue (adhesive) applied to an envelope glued part.

Banks, securities companies, credit card companies, department stores, mass merchandisers, etc. send large amounts of direct mail using envelopes to customers. In such a case, the sealing of the enclosed material is often performed by an automatic sealing machine.
In many cases, a re-wet paste is applied as a mouth paste on the inside of the flap portion of the envelope used in the sealing machine.

  In this automatic sealing and sealing machine, a plurality of sealed materials are continuously fed and sealed, the adhesive of the flap part is activated with water or the like, and the flap part is folded and sealed. Therefore, if an envelope to which no glue is applied is mixed, the envelope is sent in an opened state.

In a bag making machine, envelope-type paper (paper that has not been folded into an envelope state) is stacked on a feeder, fed one by one, and arranged on a conveyor so that only the portion to which glue is applied is exposed, and an application roll Apply glue and dry.
However, it is extremely difficult to suppress the occurrence of mistakes in the process of applying envelope glue and body glue, and when the paper is fed in an illegally overlapped or bent state, the glue is not applied to the flap part, A product is produced in which the glue is only partially applied.
Therefore, in order to automatically inspect the state of the applied glue, a technique (see Patent Document 1) in which a glue discharge nozzle is used as one electrode and another electrode is sandwiched between inspection objects, or a glue discharge nozzle is used. A technique is disclosed in which one electrode is provided and another electrode is provided on the same side as the paste discharge nozzle with respect to the inspection object (see Patent Document 2).

JP-A-5-340892 JP-A-6-273353

However, even if the distance between the electrodes is shortened as described in Patent Documents 1 and 2, the detection signal is small, and a noise signal is generated due to changes in temperature and humidity, changes in the position of the metal object in the vicinity of the glue discharge nozzle, and the like. It has become large and it has been difficult to obtain a glue detection signal with high accuracy.
Therefore, an object of the present invention is to provide an apparatus for inspecting the application state of glue on envelope-type paper using an optical sensor.

  In order to achieve the above object, the invention according to claim 1 of the envelope gluing part inspection device of the present invention is an envelope gluing part inspection device for inspecting the application state of glue on a bag making machine, The bag making machine has at least a paper feeding unit, a gluing unit, a first conveying unit, and a second conveying unit, and the gluing unit expresses the envelope paper sequentially fed from the paper feeding unit to the flap unit. By superposing and transporting multiple sheets in a state, they are glued to the exposed flap part, delivered to the first transport part having substantially the same transport speed, and the second transport part has a higher transport speed than the first transport part. The envelope type paper glued by the gluing part is made in an independent state, the second sensor fixed to the predetermined part of the second conveyance part detects the paper end of the envelope type paper, and the first conveyance until the next paper edge is detected The first sensor fixed to a predetermined part of the It is characterized in that to inspect the coating condition of the glue.

  The invention according to claim 2 is the invention according to claim 1, wherein a plurality of first sensors are attached.

  The invention according to claim 3 is characterized in that, in the invention according to any one of claims 1 and 2, the first sensor determines whether the application is good or not by the reflected light reflected from the adhesive application surface. To do.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the paste is mixed with a coloring material having a predetermined concentration for detection by the first sensor. To do.

1) An envelope gluing unit inspection device for inspecting the application state of glue on a bag making machine as defined in claim 1, wherein the bag making machine includes at least a paper feeding unit, a gluing unit, and a first transport unit. And the flap part which is exposed by overlapping and conveying a plurality of envelope-type papers sequentially fed from the paper feeding part in the state where the flap part is exposed. Glued to the first transport unit with substantially the same transport speed, and the second transport unit makes the envelope paper glued at the glue unit by making the transport speed faster than the first transport unit, and makes the second transport The second sensor fixed to the predetermined part of the first part detects the paper end of the envelope type paper, and the first sensor fixed to the predetermined part of the first conveying part is applied to the envelope type paper until the next paper end is detected. It is characterized by checking the application state of glue. To be able to implement the envelope total number as a target of examination, contamination of defects can be prevented completely.
2) In addition, as described in claim 2, in the invention described in claim 1, when a plurality of first sensors are attached, partial application unevenness of glue can also be detected.
Further, depending on the degree of coating unevenness, for example, an allowable value such as OK when a percentage of the plurality of sensors is good can be set.
3) Further, as described in claim 3, in the invention according to any one of claims 1 and 2, the first sensor determines whether the application is good or not by the reflected light reflected from the adhesive application surface. The entire inspection apparatus can be designed at a low cost.
4) Further, as described in claim 4, in the invention according to any one of claims 1 to 3, the paste is mixed with a coloring material having a predetermined concentration to be detected by the first sensor. Even when it becomes necessary to use colored paper, the application state of the glue can be checked.

Hereinafter, with reference to drawings, the envelope pasting part inspection device of the present invention is explained.
FIG. 1 is a schematic side view for explaining the envelope gluing part inspection apparatus of the present invention, and FIG. 2 is a view of the first and second transport parts of FIG. 1 viewed from the first and second sensor surfaces. FIG. 3 is a schematic diagram for explaining, FIG. 3 is a diagram for explaining all the manufacturing steps of an envelope with a window performed in the bag making machine, and FIG. 4 is a diagram for explaining a procedure for setting a color sensor.

With reference to FIG. 1, the envelope gluing part inspection apparatus of the present invention will be described.
FIG. 1 shows a state in which an envelope gluing part inspection device (first sensor 5) is attached to a first conveying part which is a part of a line of a bag making machine.
In the present embodiment, the envelope is an envelope with a window, and an example of an envelope in which a rewet paste activated by water is applied to the flap portion will be described.
Envelope-type paper 7 is stacked on the paper feed unit 1 of the bag making apparatus.
Here, the envelope pattern paper 7 refers to a printed paper or a sheet of paper that has been printed on, and then the printed material is die-cut into an expanded shape of the envelope. A sheet in a formed state.
Envelope-type paper 7 is stacked on the paper supply unit 1, and the stacked envelope-type paper 7 is extracted one by one from the bottom as shown in the drawing and fed. This sheet feeding method is used in many apparatuses as a sheet feeding method because it can be replenished without stopping the bag making machine when the envelope type paper becomes small.

The fed envelope paper 7 is conveyed and guided to the gluing unit 2. In the gluing section, only the flap section of the envelope-type paper is overlapped so as to be exposed and moves on the cylinder.
The gluing roller of the gluing section 2 (the black roller in the figure) continuously applies the glue to the exposed flap section.
The glue may be colored with a dye or the like so as to be easily detected by a color sensor (first sensor) described later.
Basically, the color of the dye mixed in the glue is different from the paper used, but the design color printed on the envelope with the window and the camouflage pattern printed on the inside of the envelope It is decided according to the color.
The envelope-type paper 7 is transferred from the gluing unit 2 to the first conveying unit 3 with glue applied to the flap portion and the glue surface exposed.

  The 1st conveyance part 3 is set to the same speed as the gluing part 2, and the envelope type | mold paper 7 moves in the state which the glue surface exposed to the flap part.

  The belt of the second transport unit 4 is moving about 15 to 25 times as fast as the first transport unit 3, and the envelope paper 7 inherited from the first transport unit 3 is independent of one sheet from the overlapped state. In this state, the belt moves on the belt of the second transport unit 4.

A first sensor (color sensor) 5 is installed at a predetermined position of the first transport unit 3 and inspects the adhesive application state of the flap portion of the envelope paper.
The first sensor 5 irradiates a plurality of locations near the center of the flap portion, and determines the quality of the glue application state based on the reflected light.
The second sensor 6 fixed to a predetermined part of the second transport unit 4 detects the end of the envelope-type paper, and the first sensor fixed to the predetermined part of the first transport unit 3 until the next paper end is detected. The light projecting part of the sensor 5 irradiates the glue surface of the flap part, and the light receiving part of the first sensor 5 captures the reflected light to determine whether the application surface is good or bad.
In this way, the glue surface near the center of the flap is inspected intermittently by the plurality of color sensors.
Since the first sensor (color sensor) 5 detects the glue surface with a spot, the number of sensors installed is determined by the width of the glue applied to the flap of the envelope paper.
In the case of a normal envelope with a window, 4 to 6 first sensors (color sensors) are arranged side by side.

With reference to FIG. 2, the state which looked at the 1st conveyance part and the 2nd conveyance part of FIG. 1 from the 1st, 2nd sensor side is demonstrated.
The envelope pattern paper 7 discharged from the gluing unit is moved on the belt of the first conveying unit 3 by overlapping a plurality of sheets in a state where the mouth paste 710 applied to the flap unit 71 is exposed. Four first sensors 5 are attached at predetermined positions of the first transport unit 3, and the application state of the mouth paste 710 applied to the flap unit 71 is inspected.

The second transport unit 4 is moving about 20 times as fast as the first transport unit 3, and the envelope paper 7 inherited from the first transport unit 3 changes from an overlapped state to an independent state of one sheet. It moves on the belt of the second transport unit 4.
The first sensor 5 installed at a predetermined position of the first transport unit 3 irradiates a plurality of locations near the center of the flap unit, and determines the quality of the glue application state based on the reflected light.
The second sensor 6 fixed to a predetermined part of the second transport unit 4 detects the end of the envelope-type paper, and the first sensor fixed to the predetermined part of the first transport unit 3 until the next paper end is detected. The light projecting part of the sensor 5 irradiates the glue surface of the flap part, and the light receiving part of the first sensor 5 captures the reflected light to determine the quality of the glue application surface.

With reference to FIG. 3, the whole preparation process of the envelope with a window performed within a bag making machine is demonstrated.
As shown in FIG. a, after performing necessary printing on a web or sheet, the printed matter is die-cut into an expanded shape of the envelope, and at the same time, the window portion 72 is also removed by the die and the envelope template 7 And a transparent paper 720 is affixed to the window 72.
A transparent plastic film may be used instead of the transparent paper 720.
At this stage, no adhesive has been applied to the flap portion 71 yet.

  As shown in FIG. b, the glue 710 is applied to the flap portion of the envelope paper 7 at the glue portion of the flap portion.

  As shown in FIG. c, while the envelope paper 7 is being conveyed, the ears 73 on both sides of the envelope paper 7 are folded inward, and the glue paper (not shown) of the ears 73 is used as shown in FIG. The body paste 730 is applied to the 7 ears 73.

The gluing application state inspection sensor as described in FIG. 2 is also attached to the gluing portion of the ear 73 shown in FIG. d, and the application state of the adhesive is inspected by the method according to FIG. Is called.
As in the case of the above-mentioned mouth paste, the paste may be colored with a dye so that it can be easily detected by the color sensor.
The color of the dye mixed in the glue is determined according to the design color printed on the envelope with the window and the print color of the camouflage pattern printed on the inside of the envelope.
In the case of the body paste, the condition such as coloring is slightly different from the case of the mouth paste because it is bonded immediately after being applied.

The envelope pattern paper 7 to which the body paste 730 is applied is folded in a direction perpendicular to the advancing direction at a folding portion (not shown) to become an envelope 70 as shown in FIG.
At this time, the mouth paste of the flap part has not yet been completely dried and is led to a drying part (not shown), and the envelope 70 after drying is discharged to a paper discharge part (not shown) of the bag making machine. Is done.
Although not shown, when the color sensor (first sensor) determines that the paste application state is poor, the marker controlled by the control unit of the operation panel at the paper discharge unit (not shown) of the bag making machine is Mark the envelopes that are judged to be poorly applied.
The operation panel always counts how many envelopes or envelope-type paper is conveyed between the color sensor and the marker.

With reference to FIG. 4, the setting procedure of the color sensor (first sensor) will be described.
Check the specifications of the envelope paper set in the bag making machine, determine the required number of color sensors, and determine the left and right mounting positions of the color sensors.
A sensor is attached to the first transport section of the bag making machine (step 1: hereinafter referred to as S1).
Next, the distance between each color sensor and the glue surface of the envelope paper is adjusted to fix the color sensor (S2). As a result, the spot diameter of each color sensor is fixed.
Further, the sensitivity of each color sensor is set (S3). As a result of sensitivity adjustment, the tolerance of each color sensor is determined.
Finally, the timing of the color sensor (first sensor) and the marker is adjusted by an operation panel (not shown) (S4).

  All envelopes manufactured by bag-making machines.

It is the side schematic diagram for demonstrating the envelope glue part inspection apparatus of this invention. It is the schematic for demonstrating the state which looked at the 1st conveyance part and the 2nd conveyance part of FIG. 1 from the 1st, 2nd sensor surface. It is a figure for demonstrating the whole preparation process of the envelope with a window performed within a bag making machine. It is a figure for demonstrating the setting procedure of a color sensor.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Paper feed part 2 Gluing part 3 1st conveyance part 4 2nd conveyance part 5 1st sensor (color sensor)
6 Second sensor (fiber sensor)
7 Envelope paper 70 Envelope 71 Flap part 72 Window part 73 Ear part 710 Mouth paste 720 Transparent paper 730 Body glue

Claims (4)

An envelope gluing unit inspection device for inspecting the application state of glue on a bag making machine, the bag making machine having at least a paper feeding unit, a gluing unit, a first transport unit, and a second transport unit,
In the gluing unit, a plurality of envelope papers sequentially fed from the paper feeding unit are conveyed while being overlapped with the flap unit exposed, and are glued to the exposed flap unit. Deliver to one transport section,
In the second transport unit, by making the transport speed faster than the first transport unit, the envelope paper glued by the glue unit is an independent state,
The second sensor fixed to the predetermined part of the second transport unit detects the end of the envelope-type paper, and the first sensor fixed to the predetermined part of the first transport unit until the next paper end is detected is the envelope-type paper An apparatus for inspecting an adhesive paste part for inspecting an application state of glue applied to an adhesive. In the envelope gluing part inspection device according to claim 1,
An envelope gluing part inspection device, wherein a plurality of first sensors are attached. In the envelope gluing part inspection device according to claim 1,
The envelope sensor for inspecting an envelope paste, wherein the first sensor determines whether the coating is good or not based on reflected light reflected from the adhesive application surface. In the envelope gluing part inspection device according to any one of claims 1 to 3,
An envelope gluing part inspection apparatus characterized in that a glue of a predetermined concentration for detection by the first sensor is mixed in the glue.

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