JP2019189284A - Pasting device for box - Google Patents

Abstract

To provide a pasting box for a box which can always spray paste at a proper position even if a back face flap inclines.SOLUTION: A paste spraying device 30 sprays paste on a pasting flap F3 in a standing state to a box carried by a transfer conveyer 10. A bending lever 34 bends the pasting flap F3 with the paste applied thereto forward in the transfer direction. An encoder 50 detects a position of the box on the transfer conveyer 10, and outputs a position signal corresponding to the position. A control part outputs a spray command signal of the paste to the paste spraying device 30 on the basis of the position signal. A laser sensor 32 measures a distance between the laser sensor 32 and the pasting flap F3 before the paste is sprayed from the paste spraying device 30. The control part corrects an output timing of the spray command signal according to the distance measured by the laser sensor 32.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a box gluing device that covers an upper opening of a box by gluing a top flap and a rear flap via a gluing flap.

  2. Description of the Related Art Conventionally, there has been known a wrap round packaging device that places an article on the bottom surface of a cardboard sheet and then wraps and packs a front flap, a rear flap, a lateral flap, and a top flap while conveying the cardboard sheet (Patent Document). 1, 2). The corrugated cardboard sheet is conveyed in a state where the front flap and the rear flap are erected and are sandwiched between the fingers. The glue jetting device is disposed above the upper end of the rear flap, and jets the glue from the oblique upper side to the upper part of the rear flap located behind the transport direction, that is, the glued flap. Thereafter, the glued flap is folded horizontally, and the top surface flap is folded to the glued flap side and sealed.

Japanese Patent No. 5003290 Japanese Patent Application Laid-Open No. 2005-225496

  The timing of spraying the glue is determined based on a signal output from a sensor for detecting the box or an encoder provided on the drive shaft of the conveyor. That is, when it is determined that the rear flap has reached a predetermined position, the paste is jetted obliquely downward from the glue jetting device toward the glue flap. However, the rear flap does not always stand vertically.For example, if the rear flap is inclined rearward, the glue is not sprayed to an appropriate position because the distance between the glue jetting device and the glue flap is too short. Arise.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a box gluing device capable of always injecting glue to an appropriate position even when a rear flap is inclined.

  A gluing device for a first box according to the present invention includes a box conveying means for conveying a box having a gluing flap provided at the upper end of a rear flap with the rear flap positioned on the rear side in the conveying direction, and a gluing flap in an upright state. Position detection means for detecting the position of the box on the box conveying means and outputting a position signal corresponding to the position. Means, a control means for outputting a glue injection command signal to the glue jetting means based on the position signal, and a glued flap detecting means for detecting the position of the glued flap of the box conveyed by the box conveying means. The control means obtains an amount of deviation between the position of the glued flap detected by the glued flap detection means and a preset reference position, and an injection command signal according to the amount of deviation. It is characterized in that it is possible to correct the output timing.

  The second box gluing device according to the present invention conveys a box provided with a top flap and a gluing flap continuously to the front flap, with the rear flap facing the front flap positioned on the rear side in the carrying direction. Box conveying means, glue injection means for injecting glue to the glued part set at a position corresponding to the glued flap on the rear flap in the standing state, and the glued flap downward so as to cover the glued part to which the glue is attached Bending means for folding, position detecting means for detecting the position of the box on the box conveying means, and outputting a position signal corresponding to the position, and outputting an injection command signal for glue to the glue jetting means based on the position signal Control means, and a glue flap detecting means for detecting the position of the glue flap of the box conveyed by the box conveying means, and the control means is provided in the glue flap detecting means. Ri obtains the deviation between the preset reference position and the detected position of the glue flap, it is characterized in that the output timing of the injection command signal in response to the amount of deviation can be corrected.

  In the first box gluing device, the control means may be able to correct the operation timing of the bending means in accordance with the obtained shift amount.

  ADVANTAGE OF THE INVENTION According to this invention, even if a rear surface flap inclines, the gluing apparatus of the box which can always inject a paste to an appropriate position can be obtained.

It is a side view of the wrap round packaging apparatus provided with the box gluing apparatus which is 1st Embodiment of this invention. It is an expanded view which shows a corrugated cardboard sheet. It is a block diagram which shows the structure of a control part. It is a figure which shows operation | movement of the glue injection apparatus and bending lever in 1st Embodiment. It is a figure which shows operation | movement of the glue injection apparatus and bending lever in 2nd Embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side view showing a wrap round packaging device including a box gluing device according to a first embodiment. The wrap round packaging apparatus wraps an article group in which a plurality of articles are gathered together in a box shape with a single cardboard sheet A, and the article B (see FIG. 4) is, for example, a bottle-shaped container.

  FIG. 1 shows that an article B (FIG. 4) is placed on the bottom flap F0 of the cardboard sheet A on the upstream side (right side in FIG. 1) of the transport conveyor (box transport means) 10, and the front flap F1 and the rear flap F2 are The state bent perpendicularly | vertically with respect to the bottom face flap F0 is shown. The cardboard sheet A is conveyed in a state in which the rear flap F2 is located on the rear side in the conveyance direction. The conveyor 10 is provided with a front finger 11 and a rear finger 12, and the front finger 11 engages with the lower end of the front flap F1, and the rear finger 12 engages with the lower end of the rear flap F2. That is, the corrugated cardboard sheet A on which the article B is placed is conveyed while being sandwiched between the front finger 11 and the rear finger 12 in the form of a box in which the front flap F1 and the rear flap F2 stand.

  A glue flap F3 is provided at the upper end of the rear flap F2, and the glue flap F3 can be bent with respect to the rear flap F2. A top surface flap F4 is provided at the upper end of the front surface flap F1, and the top surface flap F4 has substantially the same shape as the bottom surface flap F0. The top surface flap F4 can be bent with respect to the front surface flap F1 at the same height as the bending position of the gluing flap F3, and the top end portion of the top surface flap F4 is superposed on and glued to the gluing flap F3. FIG. 2 shows a corrugated sheet A developed in a plane. In this figure, the bottom flap F0, the front flap F1, the rear flap F2, and the top flap F4 are provided with lateral flaps F5 on both sides, respectively, but they are not related to the present invention, so that description thereof is omitted.

  Referring again to FIG. 1, a fixed guide 20 is provided above the conveyor 10. The fixed guide 20 includes a curved portion 21, a first horizontal portion 22, a presser portion 23, and a second horizontal portion 24. The curved portion 21 is formed so as to contact the front side in the transport direction of the lateral flap F5 provided continuously with the top surface flap F4 moving in the standing state, and gradually tilt the top surface flap F4 backward. Is done. The first horizontal portion 22 is provided in order to maintain the folded top surface flap F4 at a predetermined height position. The presser portion 23 is provided on the downstream side of the first horizontal portion 22 and protrudes below the first horizontal portion 22 so that the top end of the top surface flap F4 is lower than the upper end of the glued flap F3 in the standing state. ing.

  In the vicinity of the presser portion 23, a paste spraying device (glue spraying means) 30 for spraying paste onto the standing glued flap F3 is provided. The glue injection device 30 is positioned above the glue flap F3, and jets glue toward the glue flap F3 obliquely downward from the rear side in the transport direction. Further, the glue injection device 30 is configured to inject glue to a plurality of glued portions shifted from the center of the glued flap F3 to both sides. A radiation thermometer 31 is provided on the downstream side of the paste injection device 30. The radiation thermometer 31 measures the temperature of the glued part before the glued flap F3 is bent by a bending lever 34, which will be described later, in order to determine whether or not the glue is normally ejected to the glued part.

  A laser sensor (glue flap detecting means) 32 is provided upstream of the glue injection device 30. The laser sensor 32 measures the distance between the laser sensor 32 and the glued flap F3 before the glue is jetted from the glue jetting device 30. For example, when the gluing flap F3 is not vertical but is inclined rearward in the transport direction, the laser sensor 32 measures a relatively short distance. In this case, the height position of the upper end of the glued flap F3 is relatively low, and when the glue is injected at a normal timing, the glue is injected above the original position, that is, toward the upper end side of the glued flap F3. As will be described later, the injection timing of the glue injection device 30 is delayed, and the glue is injected after the glued flap F3 is conveyed further downstream.

  The second horizontal portion 24 is continuously provided on the downstream side of the presser portion 23, the height position of the second horizontal portion 24 is substantially the same as that of the first horizontal portion 22, and the folded top surface flap F4 has a restoring force. Engage with. That is, the portion with which the top surface flap F4 is engaged moves from the presser portion 23 to the second horizontal portion 24 in accordance with the transport operation of the transport conveyor 10, whereby the top surface flap F4 is rotated upward, and its tip is glued flap F3. It changes so that it may be located upwards. In addition, when the top surface flap F4 does not have sufficient restoring force, the top surface flap F4 is disposed via the lateral flap F5 that is provided continuously with the top surface flap F4 by arranging air injection means, a drive arm, or the like. You may make it lift.

  A bending lever (bending means) 34 is provided above the second horizontal portion 24. The bending lever 34 is fixed to the output shaft of the servo motor 35 and is rotated by the servo motor 35. The bending lever 34 has an L shape so that the tip is directed forward in the transport direction (left side in FIG. 1), and rotates forward in the transport direction at a speed higher than the transport speed of the transport conveyor 10. The folding lever 34 is configured to come into contact with the central portion of the glued flap F3, and when the box made of the corrugated cardboard sheet A passes, it presses the glued flap F3 from the rear. As a result, the glued flap F3 is bent with respect to the rear surface flap F2, and is set in a substantially horizontal state below the top surface flap F4.

  A top surface flap pressing guide 36 is provided on the downstream side of the second horizontal portion 24. The top surface flap presser guide 36 has first to third rollers 37, 38 and 39. The first roller 37 on the upstream side is at the highest position, and the third roller 39 on the downstream side is at the lowest position. Therefore, when the box passes, the top flap F4 is folded by the first roller 37 toward the glued flap F3 and gradually folded deeply as it comes into contact with the second roller 38 and the third roller 39, and is in a substantially horizontal state. become.

  A top surface flap pressing guide 40 is provided downstream of the top surface flap pressing guide 36. The top surface flap crimping guide 40 has a plurality of rollers provided at substantially the same height as the upper end of the front surface flap F1. Therefore, when the box passes, the top surface flap F4 is crimped by these rollers and pressed against the gluing flap F3. As a result, the top surface flap F4 is securely bonded to the glued flap F3.

  Next, referring to FIGS. 1 and 3, a configuration for controlling the paste injection operation and the turning operation of the bending lever 34 by the paste injection device 30 will be described. The encoder (position detection means) 50 is attached to a drive shaft (not shown) of a drive motor of the transport conveyor 10, detects the position of the box on the transport conveyor 10, and outputs a position signal corresponding to the position to a control unit (control). (Means) 51. This position signal is a pulse signal corresponding to the position of the front finger 11 or the rear finger 12. The laser sensor 32 outputs a distance signal corresponding to the distance between the laser sensor 32 and the glued flap F3 to the control unit 51. The control unit 51 outputs a paste injection command signal to the paste injection device 30 based on the position signal, and outputs a rotation command signal to the bending lever 34. Further, the control unit 51 can correct the output timing of the glue injection command signal and the rotation command signal based on the distance signal.

  The control unit 51 includes a storage unit 52, a comparison unit 53, and a correction unit 54. In the storage unit 52, from the position (reference position) of the glue flap F3 in a state where the box is at a predetermined glue flap detection position and the rear flap F2 and the glue flap F3 stand vertically, from the laser sensor 32. Are stored (reference distance). The comparison unit 53 compares the distance signal input from the laser sensor 32 with the reference distance stored in the storage unit 32, and outputs a signal corresponding to the difference between the distance signal and the reference distance. Based on the signal output from the comparison unit 53, the correction unit 54 corrects and outputs the output timing of the glue injection command signal for the glue injection device 30 and the output timing of the rotation command signal for the bending lever 34.

  With reference to FIG. 4, operation | movement of the glue injection apparatus 30 and the bending lever 34 in 1st Embodiment is demonstrated. As shown in this figure, the rear flap F2 is not necessarily perpendicular to the horizontal plane, and is conveyed depending on the elasticity of the corrugated cardboard sheet A, the bending strength applied to the rear flap F2, the pressing force received from the article B, etc. May tilt backward in the direction. The magnitude of this inclination is measured as the distance to the glued flap F3 measured by the laser sensor 32. That is, when the laser sensor 32 determines that the box has reached a predetermined glue flap detection position based on the pulse signal output from the encoder 50, the laser sensor 32 measures the distance to the glue flap F3. The control unit 51 outputs an injection command signal and a rotation command signal according to a difference between this distance and a reference distance that is a measurement value when the gluing flap F3 is vertical.

  For example, if the distance from the laser sensor 32 to the glue flap F3 is 3 mm shorter than the reference distance, it is determined that the glue flap F3 is positioned 3 mm upstream from the reference position at the glue flap detection position. In this case, the paste injection command signal for the paste injection device 30 is output later by an amount corresponding to 3 mm. That is, the glue injection device 30 jets glue when the box is located 3 mm downstream as compared with the case where the distance from the laser sensor 32 to the glue flap F3 is the reference distance. In this way, when the glued flap F3 is inclined backward, the glue is injected at an appropriate position by being injected at a later timing corresponding to the inclination angle.

  Similarly, the operation timing of the bending lever 34 is adjusted according to the distance measured by the laser sensor 32. That is, the bending lever 34 is driven when the box is positioned 3 mm downstream as compared with the case where the distance from the laser sensor 32 to the glued flap F3 is the reference distance. As described above, the folding lever 34 rotates when it is positioned 3 mm downstream from the reference distance according to the inclination angle of the glue flap F3 as in the glue injection device 30. It can be engaged at almost the same height as the flap F3, the glued flap F3 is bent accurately, and the top flap F4 is securely bonded to the glued flap F3.

  Contrary to the case described above, when the distance from the laser sensor 32 to the glue flap F3 is 3 mm longer than the reference distance, the glue flap F3 is located 3 mm downstream of the reference position at the glue flap detection position. Is determined, and control opposite to that described above is executed.

  On the other hand, the radiation thermometer 31 measures the temperature of the glued part before the folding lever 34 bends the glued flap F3. If the temperature of the glued portion is within a predetermined range, it is determined that the glue is normally ejected, and the bending lever 34 is driven. On the other hand, when the temperature of the glued portion is not within the predetermined range, it is determined that an abnormal box has been generated without the glue spraying being normally performed, and the machine is stopped. The operator then eliminates the abnormal box and identifies the cause of the abnormality to deal with it.

  A second embodiment will be described with reference to FIG. The configuration of the corrugated cardboard sheet A handled in the second embodiment is different from the first embodiment in that the glued flap F3 is connected not to the rear surface flap F2 but to the top surface flap F4 continuous to the front surface flap F1. And the gluing site | part to which glue is injected by the paste injection apparatus 30 is set to the vicinity of the upper end of the rear surface flap F2. The folding lever 34 for folding the glued flap F3 is swingably attached to a chain that moves in synchronism with the box via a cam mechanism or the like. After the glue is sprayed to the glued position of the flap F2, the folding lever 34 is swung to fold the glued flap F3 downward so as to cover the glued part.

  In the second embodiment, the other configurations and operations are the same as those in the first embodiment, and thus the description thereof is omitted.

  Note that means other than the laser sensor 32 may be used as a means for detecting the amount of deviation of the glue flap F3 from the reference position. For example, a light-shielding type photoelectric sensor may be disposed, and the deviation from the reference distance may be determined by detecting the timing at which the glue flap F3 or the rear flap F2 is shielded. Specifically, when the glue flap F3 is shielded from light at the timing when the glue flap detection position is reached, it is determined that no deviation has occurred, and light is shielded after a plurality of pulse signals from the timing when the glue flap detection position is reached. It can also be determined that the glued flap F3 is displaced backward by the amount of a plurality of pulse signals. Alternatively, the amount of deviation may be obtained based on the time measured after the light has been shielded.

  Furthermore, a plurality of photoelectric sensors can be arranged in the transport direction, and the amount of deviation can be detected by the number of photoelectric sensors that are shielded from light.

10 Box transportation means (conveyor)
30 Glue injection device (paste injection means)
32 Laser sensor (glue flap detection means)
34 Bending lever (bending means)
50 Encoder (position detection means)
51 Control unit (control means)
F1 Front flap F2 Rear flap F3 Gluing flap F4 Top flap

Claims (3)

A box transporting means for transporting the box provided with a glued flap at the upper end of the rear flap, with the rear flap positioned on the rear side in the transport direction;
Glue spraying means for spraying glue to the glued flap in the standing state;
Folding means for folding the glued flap to which the glue is attached forward in the conveying direction;
Position detecting means for detecting a position of the box on the box conveying means and outputting a position signal corresponding to the position;
Control means for outputting a paste injection command signal to the paste injection means based on the position signal;
Gluing flap detection means for detecting the position of the gluing flap of the box conveyed by the box conveying means,
The control means can obtain a deviation amount between the position of the glue flap detected by the glue flap detection means and a preset reference position, and can correct the output timing of the glue injection command signal according to the deviation amount. A box gluing device characterized by that. A box conveying means for conveying a box provided with a top surface flap and a glued flap continuously to the front surface flap, with the rear surface flap facing the front surface flap positioned on the rear side in the conveying direction;
Glue injection means for injecting glue to a glued portion set at a position corresponding to the glued flap of the rear flap of the standing state;
Folding means for folding the glued flap downward so as to cover the glued part to which glue has been attached;
Position detecting means for detecting a position of the box on the box conveying means and outputting a position signal corresponding to the position;
Control means for outputting a paste injection command signal to the paste injection means based on the position signal;
Gluing flap detection means for detecting the position of the gluing flap of the box conveyed by the box conveying means,
The control means can obtain a deviation amount between the position of the glue flap detected by the glue flap detection means and a preset reference position, and can correct the output timing of the injection command signal according to the deviation amount. Box gluing device characterized by.   2. The box gluing device according to claim 1, wherein the control unit is capable of correcting the operation timing of the folding unit according to the obtained shift amount.

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