JP2007099378A - Sealing device for box body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sealing device having a high processability regarding the sealing device for a box body which closes flaps of the box body while carrying the box body. <P>SOLUTION: While carrying the box body by a carrying means, in the sealing device, a folding process of front flaps is performed at a first processing section (A), and a folding processing of rear flaps is performed at a second processing section (B). At the same time, a process for feeding an adhesive to the folded front and rear flaps is performed, and a lateral flap folding process is performed at a third processing section (C). A process for pressurizing the side surfaces and the upper surface of the box body is performed at a fourth processing section (D), and a process for pressurizing the lateral flaps which have been folded on the front and rear flaps from the top is performed at a fifth processing section (E). The carrying means comprises first to fifth carrying means (10 to 15) which respectively correspond to the first to fifth processing sections. The carrying speeds of the second, fourth and fifth carrying means are respectively controlled in response to the processes at the second, fourth and fifth processing sections. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a box sealing device that closes a flap of a box while conveying the box.

  There has been proposed a sealing device that continuously closes the flaps of a box while conveying a plurality of boxes having different sizes by a conveyor, an example of which is shown in FIG. Here, FIG. 19 is a cross-sectional view of the sealing device described in Patent Document 1. FIG.

  The sealing device has a first roller group 111, a second roller group 112, and a third roller group 113 in order from the upstream in the transport direction, and a plurality of different sizes with these roller surfaces as transport surfaces. The box is continuously transported.

  A chain belt 114 that rotates endlessly at a constant speed is used as the box conveying means. A plurality of moving rods 115 are fixed to the chain belt 114 at predetermined intervals. The moving rods 115 driven together come into contact with the rear end portion of the box, so that the box is transported downstream in the transport direction.

  The first to third roller groups 111 to 113 can be moved up and down by first to third lifting devices 116 to 118, respectively, and a box is disposed above the first to third roller groups 111 to 113. A sealing processing unit for sealing the body is provided. The sealing processing unit includes a front flap folding device 121, a rear flap folding device 122, a both-side flap folding device 123, a sticking device 124, and a pressure roller device 125 in order from the upstream in the transport direction. Each of the devices 121 to 125 that are configured rotates or moves downward to perform a sealing process corresponding to each device on the flap of the box.

  According to the above-described configuration, when the box body that is moved at a constant speed by the transfer rod 115 is on the first roller group 111, the first roller group 111 is moved from the standby position by the first lifting device 116. Move to the folding position corresponding to the size. And the front flap of a box is folded inside the box by contact | abutting to the arm of the front flap folding apparatus 121 driven rotationally. Similarly, by driving the second to third lifting devices 117 and 118 in the other sealing processing units, the second to third roller groups 112 and 113 are moved upward from the standby position, and the rear A rear flap folding process by the flap folding apparatus 122, a double-sided flap folding process by the double-side flap folding apparatus 123, a flap sticking process by the sticking apparatus 124, and a pressure process by the pressure roller 125 are sequentially performed.

When each process in the sealing processing unit is completed, each of the roller groups 111 to 113 is returned to the standby position by the lifting devices 116 to 118.
Japanese Utility Model Publication No. 49-6359 (FIG. 1 etc.)

  However, in the above-described conventional example, it is difficult to adjust the supply timing of the box because the box must be supplied between the transfer rods 115.

  In addition, when the box cannot move smoothly on the conveyance surface (for example, slip with respect to the conveyance surface), the moving rod 115 abuts from the rear in the conveyance direction in a state where movement of the box in the conveyance direction is restricted, The box body may be crushed by the transfer rod 115.

  In addition, the interval between the transfer rods 115 is set corresponding to the maximum dimension of the supplied box, and since each transfer rod 115 is fixed to the chain belt 114, a small box is used. When transporting, the interval between the transfer rods 115 cannot be reduced, and the processing capacity cannot be increased. Even if each transfer rod 115 is movably attached to the chain belt 114, the drive of the chain belt 114 must be stopped and the position of each transfer rod 115 must be adjusted each time the size is changed. For this reason, the work procedure becomes complicated, and on the contrary, the processing ability is impaired.

  Furthermore, the rotational speed of the chain belt 114 is set to a constant low speed based on the working time of a processing step (for example, a sticking process) that requires the most working time among a plurality of sealing processes. For this reason, even in other processing steps that can be processed at a speed higher than the low speed, the box is transported at the low speed, so that the processing capability is impaired.

  Moreover, after each process in a sealing process part is complete | finished, the 1st-3rd roller group 111-113 located in a folding position is once returned to a standby position, and from there to a folding position corresponding to a new box There are many useless movements because it must be driven.

  Therefore, in the present invention, in order to solve the above-mentioned problems, a sealing device having a high processing capacity is provided.

  In order to solve the above-mentioned problems, the first invention of the present application performs the folding process of the front flap in the first processing unit while transporting the box body in which the front and rear flaps are in the open state by the transport means, The second processing unit disposed at the subsequent stage of the first processing unit performs the folding process of the rear flap, performs the process of applying an adhesive to the folded front and rear flaps, and performs the second process. The third processing unit arranged at the rear stage of the unit performs the horizontal flap folding process, and the fourth processing unit arranged at the rear stage of the third processing unit performs the process of pressurizing at least the upper surface of the box. A box-sealing device, wherein the conveying means includes a first conveying means corresponding to the first processing unit, a second conveying means corresponding to the second processing unit, and the third A third transport unit corresponding to the processing unit and a fourth processing unit. Speed control means for controlling the transport speed of each of the transport means to a speed according to the processing of each of the processing units, and the speed control means includes at least the second, According to the process in the fourth processing unit, the transport speed of the corresponding transport unit is changed.

  Here, it is preferable to cause the speed control means to change the second and fourth transport speeds when the box body reaches the predetermined positions of the second and fourth transport means, respectively.

  Further, the second processing unit is provided with a pendulum-type swinging hammer that approaches the rear flap of the box body from the upstream in the conveying direction, and when the rear flap is folded into the speed control means, The transport speed of the second transport means may be controlled to be slower than the hammer speed of the hammer, and the transport speed of the second transport means may be slower than the transport speed before and after folding the rear flap.

  Further, it is preferable that the speed control unit controls the fourth transport unit so that a transport speed when performing the pressurizing process in the fourth processing unit is slower than a transport speed before and after the pressurizing process. .

  Moreover, it is good to provide the said 4th process part with the horizontal compression means which pressurizes a box from a side surface. Further, a fifth processing unit that pressurizes the upper surface of the box body is provided at a subsequent stage of the fourth processing unit, and the transport unit includes a fifth transport unit corresponding to the fifth processing unit. And it is good to make the said speed control means change the conveyance speed of a said 5th conveyance means according to the process in a said 5th process part.

  In the second invention of the present application, a plurality of boxes having different heights in which the front and rear and side flaps are in an open state can be continuously conveyed by the conveying means, and a plurality of processing units arranged in parallel in the conveying direction are provided. A sealing device for folding and sticking a flap of a box using a processing unit arranged in front of and behind in the transport direction among the plurality of processing units, and the upstream processing unit When the processing unit disposed on the downstream side is a subsequent processing unit, a preceding lifting mechanism that moves the preceding processing unit up and down, a subsequent lifting mechanism that moves the subsequent processing unit up and down, and Elevating control means for controlling the elevating position of the subsequent processing unit by the elevating mechanism of the subsequent stage, and when the elevating control means moves up and down to the processing position where the previous processing unit processes the box, Detect the relative position of the processing unit of the former stage and the latter stage, Based on the detection result, control is performed so that the subsequent processing unit is moved to a position corresponding to the processing position, and if the previous processing unit is not moved up and down, the subsequent processing unit is not moved up and down. It is characterized by.

  Here, a height control plate is arranged at the conveyance direction rear end of the preceding processing unit, a height control sensor is arranged at the conveyance direction front end of the latter processing unit, and the height control plate and the height control are arranged. The sensors may be arranged at overlapping positions in the transport direction. In this case, the sensor output is switched according to the overlap and non-overlap of the height control sensor with respect to the height control plate in the elevation direction. Then, based on the change in the sensor output of the height control sensor before and after the preceding processing unit moves to the processing position, the subsequent processing unit is moved up and down to a position corresponding to the processing position. It is good to move.

  In addition, when the box to be processed reaches a predetermined position in the transport unit, the lifting control unit may start to move up and down to a position corresponding to the processing position of the subsequent processing unit.

  Further, by contacting the front flap of the box body with the front processing portion, the contact folding portion for folding the front flap and the contact folding portion are provided, and emit light obliquely in the horizontal direction with respect to the conveying direction. A flap detection sensor, a horizontal moving means for moving the contact folding part upstream in the conveying direction, and a contact folding part control means for controlling the driving of the preceding lifting and lowering means and the horizontal movement means are provided. When lateral flap detection is performed by the flap detection sensor while lowering the contact fold portion to the fold portion control means, the contact fold portion is moved upstream in the transport direction, and the contact fold portion It is preferable to perform a front flap folding operation.

  According to the first invention of the present application, since the transport speed of the corresponding transport means can be changed at least according to the processing in the second and fourth processing sections, a box sealing device having a high processing capacity is provided. be able to.

  Further, according to the second invention of this application, when the upstream processing unit moves up and down to the processing position for processing the box, the relative position of the upstream processing unit and the downstream processing unit is detected, and based on the detection result. The subsequent processing unit is moved to a position corresponding to the processing position, and when the previous processing unit does not move up and down, the subsequent processing unit is controlled not to move up and down. It is not necessary to temporarily retract the container to the initial position before moving it to the position corresponding to the processing position, and it is possible to provide a box sealing apparatus having a high processing capacity.

  With reference to FIG. 1, the outline | summary of the sealing apparatus which is an Example of this invention is demonstrated. FIG. 1 is a schematic view of a sealing device according to an embodiment of the present invention.

  This sealing device includes a front flap folding part A (first processing part) for performing a front flap folding process on a box body in which the front and rear flaps and the lateral flap are opened from the upstream in the transport direction, and a rear flap. A rear flap folding / adhesive application unit B (second processing unit) that folds and applies adhesive to the folded front and rear flaps, and a horizontal flap folding unit that folds the horizontal flaps to the folded front and rear flaps C (third processing unit) and the first pressurizing the box with the front and rear flaps and the lateral flaps folded in the horizontal direction from the direction orthogonal to the conveyance and the lateral flaps folded from above the box It has a part D (fourth processing part) and a second pressurizing part E (fifth processing part) that pressurizes the lateral flaps folded from above the box.

  In the front flap folding part A, the front flap folding device 601 is moved down in the conveying direction while lowering the front flap folding device 601 with respect to the box that is stopped in the introduction conveyor 10 (first conveying means), and the front flap is moved to the box. The folding process is performed by pushing inward.

  In the rear flap folding / adhesive application part B, first, the pendulum hammer 611b is brought into contact with the box on the first belt conveyor 11 (second conveying means) from the rear of the box, and the rear flap By pressing, the folding process is performed. An adhesive is applied to the folded front flap and rear flap at the adhesive application portion 61d.

  In the rear flap folding / adhesive application unit B, the first flap conveyor 11 performs the rear flap folding process and the adhesive application process while conveying the box by the first belt conveyor 11. The transport speed can be changed. Specifically, while the rear flap folding process is being performed, the conveyance speed of the first belt conveyor 11 is decreased, and the conveyance speed is controlled so as to be lower than the hammer speed of the hammer 611b.

  Thereby, the folding process of a back flap can be performed reliably.

  In the lateral flap folding part C, the lateral flap folding process is performed on the box body in which the front and rear flaps are folded and the lateral flap is open.

  In this horizontal flap folding process, the belt flap of the box conveyor being conveyed by the second belt conveyor 12 (third conveying means) is gradually inclined downward toward the downstream in the conveying direction, while the belt conveyor The lateral flap folding bar 62b extending toward the center is brought into contact with the lateral flap to perform the lateral flap folding process.

  The lateral flap that is in contact with the lateral flap folding bar 62b is gradually folded into the inside of the box from the downstream side in the transport direction. In the present embodiment, the transport speed of the second belt conveyor 12 is set to a constant speed. However, in order to ensure the lateral flap folding process, the transport speed is maintained during the lateral flap folding process. You may slow down.

  In the 1st pressurizing part D, while conveying a box with the 3rd belt conveyor 13 (4th conveyance means), while applying a pressure process with respect to the side of a box, it is with respect to the upper surface of a box Pressurize.

  The third belt conveyor 13 can change the conveyance speed, and the conveyance speed when the box body is subjected to the pressure treatment is the same as the conveyance speed before the pressure treatment and the pressure treatment. The speed is controlled to be slower than the transport speed. As a result, the time during which the box stays in the first pressurizing part D is shortened by increasing the speed after the pressurizing process while increasing the processing efficiency while reliably performing the pressurizing process. Can do.

  In the second pressurizing unit E, a pressure treatment is performed from above on the lateral flap folded from above the front and rear flaps while the box is transported by the fourth belt conveyor 14 (fifth transport means). Do.

  The fourth belt conveyor 14 can change the conveyance speed, and the conveyance speed when the box body is subjected to the pressure treatment is the conveyance speed before the pressure treatment and the pressure treatment after the pressure treatment. The speed is controlled to be slower than the transport speed. As a result, the time during which the box stays in the second pressurizing unit E is shortened by increasing the speed after the pressurizing process while increasing the processing efficiency while performing the pressurizing process reliably. Can do.

  Here, a plurality of boxes having different heights may be continuously supplied to the sealing device, and each processing unit A to E is moved up and down according to the height of these boxes, Processing corresponding to each of the processing units A to E is performed. In the present embodiment, the raising / lowering control of the subsequent processing unit is performed based on the relative position in the ascending / descending direction of the preceding processing unit and the subsequent processing unit arranged in parallel in the transport direction.

  That is, after the front processing unit is moved up and down to the height position at which the box is to be processed, the relative position in the ascending / descending direction of the front processing unit and the rear processing unit is detected, and based on the detection result, the rear processing unit is The box is moved up and down to a height position to be processed.

  In the present embodiment, the front flap folding part A, which is arranged at the most upstream among the processing parts A to E, is set so as to return to the initial position after processing the box, but its downstream side. As described above, the height of the processing units B to E arranged in the control unit is controlled based on the relative position in the ascending / descending direction with respect to the preceding processing unit.

  For example, when detecting the absolute position of the upstream processing unit in the ascending / descending direction and moving the downstream processing unit to a height corresponding to the absolute position, the subsequent processing unit must be returned to the initial position. However, as in this embodiment, if the subsequent processing unit is moved up and down based on the relative position, it is not necessary to return to the initial position once, so that the processing time can be shortened.

  Next, the structure of each process part AE which comprises a sealing apparatus is demonstrated in detail.

  First, the configuration of the front flap folding unit 60 that performs the folding process on the front flap of the box in the front flap folding portion A will be described with reference to FIGS. 1 and 5 to 11. Here, FIGS. 5 to 8 are operation explanatory views of the front flap folding unit 60 and the rear flap folding / sticking device 61, and FIG. 5 shows both the front flap folding unit 60 and the rear flap folding / sticking device 61. FIG. 6 shows a state when waiting at the initial position at power-on or reset, and FIG. 6 shows a state when the front flap folding unit 60 is lowered to the folding position. FIG. 8 shows a state in which the rear flap folding / sticking device 61 has moved to the height of the front flap folding unit 60 lowered to the folding position, and FIG. 8 shows that the front flap folding unit 60 is retracted upward from the folding position. And the state by which the box was conveyed in the conveyance direction downstream by stopper cancellation | release is shown in figure.

  FIG. 9 is a cross-sectional view of the contact folding device 601 illustrating the arrangement of the flap detection device. FIG. 10 shows that the front folding device 601 moves upstream in the conveying direction while moving downward, and the front flap is moved forward. It is operation | movement explanatory drawing of the contact folding apparatus 601 which illustrated a mode that it folds.

  FIG. 11 is a cross-sectional view of the front flap lifting device 602 and the centering device 32 in the conveyance orthogonal direction.

  The front flap folding unit 60 is in contact with the front flap of the box body and folds the front flap inside the box body, the front flap lifting device 602 that lifts and lowers the contact folding apparatus 601, and the contact folding And a front flap horizontal moving device 603 for moving the device 601 in the horizontal direction (box conveying direction).

  The contact folding device 601 includes a housing 601a having a through opening in a direction perpendicular to the conveyance of the box, and one end is fixed to the upstream end surface of the housing 601a, and the remaining other side is slanted. A contact portion 601b made of a V-shaped metal plate extending upward is attached. An optical flap detection device 604 that detects the presence or absence of a flap illustrated in FIGS. 9 and 10 and an optical flap height detection device 605 that detects the height of the flap are provided inside the housing 601a. Yes. The flap detection device 604 is disposed in an oblique direction in the horizontal direction with respect to the conveyance direction, and the light emitted from the light emitting element is directed in the direction in which the front flap and the lateral flap are located.

  The front flap lifting / lowering device 602 has a lifting / lowering cylinder housing 602a and a lifting / lowering piston rod 602b that can be moved back and forth in the vertical direction with respect to the lifting / lowering cylinder housing 602a. 601 is mounted, and the contact folding device 601 can be moved up and down by moving the lifting / lowering piston rod 602b back and forth with respect to the lifting / lowering cylinder housing 602a.

  As shown in FIG. 11, a pair of elevating guide bars 602c for guiding the elevating piston rod 602b in the elevating direction is provided on both the left and right sides of the elevating piston rod 602b with respect to the box conveying direction. A pair of guide flanges 602d is fixed to the upper end of the elevating guide bar 602c, and the lower end is attached to the contact folding device 601.

  A cylinder flange 602e having an opening slightly larger than the inner diameter of the lifting cylinder housing 602d at the center and having an outer shape larger than the outer diameter of the lifting cylinder 602d is attached to the lower end of the lifting cylinder housing 602d.

  The front flap lifting / lowering device 602 is fixed to the front flap horizontal moving device 603, and moves in the horizontal direction (box conveying direction) by driving the front flap horizontal moving device 603.

  The front flap horizontal movement device 603 includes a horizontal cylinder 603a fixed to a frame 70 that supports the introduction conveyor 10 and the first to fourth belt conveyors 11 to 14, and a horizontal piston that can advance and retreat with respect to the horizontal cylinder housing 603a. A rod 603b and a slide member 603c, which is fixed to the tip of the horizontal piston rod 603b, and has a cross-sectional shape in the direction perpendicular to the box conveyance, and has a reverse hat shape. A T-shaped horizontal guide protrusion 603d for guiding in the transport direction is provided.

  Opening portions 6031c and 6032c through which the elevating piston rod 602b of the front flap elevating device 602 and the pair of elevating guide bars 602c pass are provided at the inner lower end surface of the slide member 603c, and the lower end portion of the elevating cylinder housing 602a is provided. A fixed cylinder flange 602e is fixed.

  A guide portion 603e having a guide groove portion having a T-shaped cross section is fixed to an upper end surface of the slide member 603c bent in the conveyance orthogonal direction, and a horizontal guide projection portion 603d is engaged with the guide groove portion 603e.

  According to the above-described configuration, by moving the horizontal piston rod 603b of the front flap horizontal moving device 603 forward and backward with respect to the horizontal cylinder housing 603a, the contact folding device 601 and the front flap are lifted while being guided by the horizontal guide protrusion 603d. The device 602 moves together in the transport direction of the box.

  Next, the operation of the front flap folding unit 60 will be described.

A centering device 32 for guiding the box to the center of the introduction conveyor 10 is provided on the upstream side of the stopper 31 of the introduction conveyor 10. The centering device 32 includes a pair of cylinder housings 32a arranged on the left and right sides immediately below the center of the introduction conveyor 10, a piston rod 32b that moves forward and backward with respect to the cylinder housing 32a, and a tip of the piston rod 32b. A holding bar 32c that extends upward through the rollers of the introduction conveyor 10 and is fixed to the upper part of the holding bar 32c, and moves horizontally in the direction perpendicular to the conveyance of the box in conjunction with the advance and retreat of the piston rod 32b. And a pair of flange plates 32d.
When the box is transported by the introduction conveyor 10 and abuts against the stopper 31, the optical box presence detection sensor 47 provided on the side of the introduction conveyor 10 detects the box. When the box presence detection sensor 47 detects the box body, the piston rod 32b is driven in the shortening direction, and the pair of flange plates 32d abut against the box body so as to be sandwiched from the conveyance orthogonal direction of the box body. It moves to the approximate center of the introduction conveyor 10 by 32d.

  Then, along with the operation of the centering device 32, the elevating piston rod 602b of the front flap folding unit 60 waiting at the initial position in FIG. 5 is extended, the contact folding device 601 moves downward, and the flap detection device 604 and Detection operation by the flap height detection device 605 is started.

  As shown in FIG. 10A, when the contact / folding device 601 descends, the light emitted from the light emitting element of the flap detection device 604 hits the front flap, and the presence of the front flap is detected, this front flap is detected. In response to the detection signal, the extended horizontal piston rod 603b is driven in the shortening direction. Accordingly, the contact folding device 601 moves upstream in the conveyance direction of the box while moving downward.

  Then, as shown in FIG. 10B, the contact portion 601b of the contact folding device 601 contacts the upper portion of the front flap, and the front flap tilts while being gradually pushed into the inside of the box. As shown in FIG. 10C, when the front flap is tilted by a predetermined angle or more, the contact target of the front flap is gradually switched from the contact portion 601b to the housing 601a, and the front flap is further moved to the inside of the box. Fold it in. When the flap height detecting device 605 detects that the interval from the flap height detecting device 605 to the front flap has reached a predetermined value, the front flap lifting device 602 and the front flap horizontal moving device 603 are moved. Stop and end the front flap folding operation.

  Note that the flap detection device 604 is arranged in a state of being inclined with respect to the transport direction as shown in FIG. 9, so that not only the front flap but also the lateral flap can be detected.

  This may be supplied to the introduction conveyor 10 in a state where the front flap is folded incompletely by an operator working on the upstream side of the sealing device. In such a case, only the front flap is detected. If the flap detection device 604 is disposed in the front, the front flap is not detected, and there is a possibility that the flap folding process by the contact folding device 601 cannot be performed.

  Therefore, even when the front flap is supplied in an incompletely folded state, the flap detection device 604 is inclined with respect to the transport direction in order to cause the contact folding device 601 to perform the folding process of the front flap. It is arranged.

  Next, the configuration of the rear flap folding / sticking device 61 provided above the first belt conveyor 11 will be described.

  The rear flap folding / sticking device 61 includes a rear flap lifting cylinder 61a, a rear flap folding unit 61b, a folded front flap and a pressure contact portion 61c that presses the rear flap downward, a front flap and a rear pressure contacted by the pressure contact portion 61c. An adhesive application part 61d for applying an adhesive to the flap is provided.

  The rear flap lifting / lowering cylinder 61a has a lifting / lowering cylinder housing 611a and a lifting / lowering piston rod 612a that moves forward / backward with respect to the lifting / lowering cylinder housing 611a. A rectangular parallelepiped attachment member 613a for attaching 61c and the adhesive application portion 61d is attached extending in the transport direction, and this attachment member 613a is guided in the up-and-down direction by a pair of up-and-down guide bars 614a.

  The rear flap folding unit 61b has a hammer 611b, and a rotating flange 612b is fixed to a proximal end portion of the hammer 611b by a fastening member 613b. The rotating flange 612b is in the longitudinal direction of the mounting member 613a. A hammer rotating shaft 614b fixed to the side surface is rotatably supported.

  Further, the tip of a hammer drive piston rod 615b is connected to the opposite side of the rotary flange 612b with respect to the hammer rotation shaft 614b with the fastening member 613b interposed therebetween. The hammer drive piston rod 615b is connected to the hammer drive cylinder housing 616b. As the rotary flange 612b swings about the hammer rotation shaft 614b, the hammer 611b fixed to the rotary flange 612b also rotates according to the swinging motion of the rotary flange 612b. It has become.

  The press contact portion 61c is suspended from a support bar 611c fixed to the lower surface of the attachment member 613a, and press-contacts the folded front flap and rear flap from above.

  An adhesive application part 61d is provided on the downstream side of the pressure contact part 61c in the transport direction, and the adhesive application part 61d is suspended by the attachment member 613a via the support member 611d and is folded. An adhesive is applied to the flap and the rear flap.

  A height control sensor 48 including an upper sensor 48a and a lower sensor 48b for controlling the height of the rear flap folding / sticking device 61 is provided at the upstream end of the attachment member 613a. Based on the detection result of the control sensor 48, the elevating piston rod 612a is driven. The vertical sensor 48a is set to an on state when overlapping in the height direction with respect to a height control plate 606 provided in the contact folding device 601, and is set to an off state when not overlapping.

  Further, a height control plate 49 for determining an on / off state of a height control sensor 73 provided in a lateral flap folding device 62 described later is attached to the downstream end of the attachment member 613b.

  It should be noted that the height control plate 606 and the height control sensor 48 provided in the contact folding device 601 have a height adjustment of the rear flap folding / sticking device 61 with the upper sensor 48a off and the lower sensor 48b on. Is assumed to have been performed.

  Next, with reference to FIG. 7 and FIG. 8, the rear flap folding and sticking process by the rear flap folding / sticking device 61 arranged in the rear flap folding / adhesive application part B will be described.

  When the folding process of the front flap by the contact folding apparatus 601 is completed (see FIG. 6), as shown in FIG. 7, the lifting piston rod 612a is driven in the extending direction, and the rear flap folding / sticking apparatus 61 is The sensor 48b moves down to a position where it overlaps the height control plate 606 in the ascending / descending direction and stops. A rear flap folding up / down sensor 81 is arranged on the side of the second belt conveyor 12 slightly downstream of the adhesive pre-application sensor 71, and the box passes by the side of the flap folding up / down sensor 81 thereafter. And the raising / lowering control of the back flap folding and sticking apparatus 61 is started, and details will be described later.

  When the lowering operation of the rear flap folding / sticking device 61 stops, the stopper 31 entering the box conveyance path of the introduction conveyor 10 moves down and retracts out of the box conveyance path.

  When the stopper 31 is retracted out of the transport path of the box, the box that has been controlled to be transported downstream in the transport direction by the stopper 31 is transported downstream in the transport direction, and the first belt is fed from the introduction conveyor 10. Transfer to the conveyor 11.

  When the box that has entered the first belt conveyor 11 passes by the side of the hammer start sensor 41, the hammer drive piston rod 615b is driven in the extending direction.

  When the hammer drive piston rod 615b is driven in the extending direction, the hammer 611b waiting in the initial position starts rotating in the counterclockwise direction (the direction of arrow F in FIG. 1) about the hammer rotation shaft 614b. .

  The hammer 611b follows the box and approaches from the rear of the box and comes into contact with the rear flap. As a result, the rear flap is folded inside the box, and the rear flap folding process ends.

  When the box passes the hammer return sensor 42, the extended hammer drive piston rod 615b is driven in the shortening direction, and the hammer 611b is rotated in the clockwise direction around the hammer rotation shaft 614b (opposite to the arrow F in FIG. 1). Direction). And it returns to the initial position of FIG.

  When the folding process of the front flap and the rear flap is completed, the box is transported downstream in the transport direction by the first belt conveyor 11, and the front flap and the rear flap are pressed from above by the press contact portion 61c.

  An adhesive pre-application sensor 71 is provided at the start of the second belt conveyor 12 on the side of the second belt conveyor 12, and the tip of the box after the pressure contact processing by the pressure contact portion 61c is the adhesive. When passing by the side of the pre-application sensor 71, the adhesive pre-application sensor 71 is turned on.

  When the adhesive pre-application sensor 71 is turned on, the adhesive is applied from the adhesive application portion 61d to the front flap for a predetermined time. When the rear end of the box passes the side of the pre-adhesive application sensor 71, the pre-adhesive application sensor 71 is turned off.

  Further, a post-adhesive application sensor 72 is provided slightly upstream from the end of the first belt conveyor 11, and this post-adhesive application sensor 72 is turned on when the tip of the box passes, It is set to switch off when the back end of the body passes.

  When the rear end of the box body to which the adhesive is supplied to the front flap passes by the side of the post-adhesive application sensor 72, the post-adhesive application sensor 72 switches from on to off, and the adhesive application unit 61d adheres to the rear flap. The agent is applied for a certain time.

  When the adhesive is applied by the adhesive application unit 61d and the box is transferred to the second belt conveyor 12, the lateral flap folding device 62 described later starts folding processing for the lateral flap.

  Next, height control of the rear flap folding / sticking device 61 will be described with reference to FIGS. 5 to 8, 12, and 13. Here, FIG. 12 is an operation explanatory diagram of the rear flap folding / sticking device 61 driven up and down based on the detection result of the height control sensor 48, and FIG. 13 is a diagram of the rear flap folding / sticking device 61. It is the flowchart which showed the control procedure which controls height.

  FIG. 5 shows an initial position (origin position) when the power is turned on or reset. When the box is detected by the box presence detection sensor 47 and the front flap folding operation by the contact folding device 601 is completed, the detection operation by the height control sensor 48 is started. However, if there is a box in the rear flap folding / adhesive application part B, the height passes when the box passes the rear flap folding lift sensor 81 and the rear flap folding sensor 81 is switched from on to off. The detection operation by the control sensor 48 is started.

  When the detection operation by the height control sensor 48 is started, it is determined whether or not both the upper and lower sensors 48a and 48b are in an on state (step S401). When both are in the on state, that is, when both the upper and lower sensors 48a, 48b are stopped in a state where they overlap with the height control plate 606 in the ascending / descending direction (see FIG. 12A), the ascending / descending piston rod 612a. Is driven in the shortening direction to move the rear flap folding / sticking device 61 upward (step S402).

  Then, it is determined whether or not the upper sensor 48a has been switched from on to off (step S403). When the upper sensor 48a is switched, that is, as shown in FIG. 7, only the upper sensor 48a out of the upper and lower sensors 48a and 48b controls the height. When it moves to a position that does not overlap with the plate 606 in the up-and-down direction, the drive of the up-and-down piston rod 612a is stopped.

  On the other hand, if both the upper and lower sensors 48a and 48b are not on in step S401, it is determined whether or not both the upper and lower sensors 48a and 48b are off (step S405). When the height control plate 60 descends to a position that does not overlap with the vertical sensors 48a and 48b in the ascending / descending direction (see FIG. 12B), the elevating piston rod 612a is driven in the extending direction to fold and paste the rear flap. The landing device 61 is moved downward (step S406).

  Then, it is determined whether or not the lower sensor 48b has been switched from OFF to ON (step S407). In the case of switching, that is, as shown in FIG. 7, only the lower sensor 48b of the upper and lower sensors 48a and 48b has a height. When it moves to the position which overlaps with the control board 606 in the raising / lowering direction, the drive of the raising / lowering piston rod 612a is stopped (step S408).

  In step S405, if both the upper and lower sensors 48a and 48b are not turned off, that is, if the height control plate 606 is moved downward and only the upper sensor 48a is switched off among the upper and lower sensors 48a and 48b, the lifting piston rod 612a is not driven, and the height control of the rear flap folding / sticking device 61 is not performed (step S409).

  With reference to FIG.1 and FIG.14, the structure of the horizontal flap folding apparatus 62 arrange | positioned at the horizontal flap folding part C is demonstrated. FIG. 14 is a top view of the lateral flap folding device, but the lifting device is omitted.

  The lateral flap folding device 62 includes a lateral flap lifting cylinder 62a, an abutting lateral flap folding bar 62b driven up and down by the lateral flap lifting cylinder 62a, and a pressing plate 62c for pressing the front flap and the rear flap from above. Have.

  The lateral flap lifting cylinder 62a has a lifting cylinder housing 621a and a lifting piston rod 622a that advances and retreats with respect to the lifting cylinder housing 621a. At the tip of the lifting piston rod 622a, a contact horizontal flap folding bar 62b and A rectangular parallelepiped attachment member 62d for attaching the holding plate 62c is provided extending in the box conveyance direction, and the attachment member 62d is guided in the up-and-down direction by a pair of up-and-down guide bars 62e.

  The abutting lateral flap folding bar 62b is inclined from the upstream side toward the downstream side in the conveying direction while gradually inclining downward, and the folding part 621b that approaches the center side of the second belt conveyor 12 and the leading end of the folding part 621b A pair of flap pressing portions 622b extending in parallel with the body conveyance direction are provided on both the left and right sides of the second belt conveyor 12, and are suspended from the attachment member 62d via support bars 621d.

  A pair of holding plates 62c are provided on both the left and right sides of the second belt conveyor 12 so as to extend in the conveying direction of the box, and are disposed below the folding portion 621b of the contact lateral flap folding bar 62b. .

  In order to avoid interference with the adhesive region of the adhesive applied to the front flap and the rear flap, the pressing plate 62c is arranged to press the folded front flap and rear flap outside the adhesive region in the conveyance orthogonal direction. Has been.

  A height control sensor 73 including a pair of upper sensor 73a and lower sensor 73b is provided at the upstream end of the attachment member 62d in the transport direction, and a first pressurizing device is provided at the downstream end. A height control plate 74 for controlling the height 63 is provided.

  Further, a lateral flap folding lift sensor 82 is disposed at the end of the second belt conveyor 12 on the side of the second belt conveyor. When the box passes by the lateral flap folding lift sensor 82, The elevation control of the lateral flap folding device 62 using the height control sensor 73 is started, and details will be described later.

  When the box is transferred from the first belt conveyor 11 to the second belt conveyor 12, the lateral flap comes into contact with the holding plate 62c in contact with the front flap and the rear flap in the folded state. It contacts the folding part 621 of the horizontal flap folding bar 62b. Then, the lateral flap is gradually folded into the inside of the box from the front end side. When the lateral flap is folded, a pressing plate 62c is interposed between the front flap, the rear flap, and the lateral flap.

  When the horizontal flap folding process is completed, the holding plate 62c is gradually pulled out of the flap according to the conveyance of the box, the flap holding portion 622b of the horizontal flap folding bar 62b comes into contact with the horizontal flap, Bonded to the front and rear flaps.

  When this bonding process is completed, the box moves from the second belt conveyor 12 to the third belt conveyor 13.

  Next, height control of the lateral flap folding device 62 will be described based on FIGS. 15 and 16. Here, FIG. 15 is an explanatory view of the operation of the lateral flap folding device 62 that is driven up and down based on the detection result of the height control sensor 73, and FIG. 16 is a flowchart for explaining the height control of the lateral flap. It is.

  In the present embodiment, the height control plate 49 and the height control sensor 73 provided on the attachment member 613a are lateral flaps when the upper sensor 73a is in an overlapping (on) state and the lower sensor 73b is in a non-overlapping (off) state. It is assumed that the height of the folding device 62 has been adjusted.

  When the raising / lowering operation of the rear flap folding device 61 is completed, the detection operation by the height control sensor 73 is started. However, when there is a box in the lateral flap folding portion C, the height control sensor 73 determines that the box passes through the lateral flap folding lift sensor 82 and the lateral flap folding lift sensor 82 switches from on to off. The detection operation is started.

  When the detection operation by the height control sensor 73 is started, it is determined whether or not both the upper and lower sensors 73a and 73b are in an on state (step S501).

  When both are in the on state, that is, as shown by the solid line in FIG. 15A, both the upper and lower sensors 73a and 73b are stopped in a state where they overlap with the height control plate 49 in the ascending and descending direction. If so, the elevating piston rod 622a is driven in the extending direction to move the lateral flap folding device 62 downward (step S502).

  It is determined whether or not the lower sensor 73b has been switched from the on state to the off state (step S503). When the lower sensor 73b is switched, that is, as illustrated by the solid line in FIG. When only 73b moves to a position that does not overlap with the height control plate 49 in the lifting / lowering direction, the driving of the lifting / lowering piston rod 622a is stopped (step S504).

  On the other hand, if both the upper and lower sensors 73a and 73b are not on in step S501, it is determined whether or not both the upper and lower sensors 73a and 73b are off (step S505). When the height control plate 49 moves up to a position that does not overlap with the vertical sensors 73a and 73b in the vertical direction as shown by the solid line in FIG. 15C, the vertical piston rod 622a is driven in the shortening direction, The lateral flap folding device 62 is moved upward (step S506).

  Then, it is determined whether or not the upper sensor 73a has been switched from OFF to ON (step S507). When switched, that is, as shown by the solid line in FIG. 15, only the upper sensor 73a among the upper and lower sensors 73a and 73b. However, when it moves to the position which overlaps with the height control board 49 in the raising / lowering direction, the drive of the raising / lowering piston rod 622a is stopped (step S508).

  In step S505, when both the upper and lower sensors 73a and 73b are not off, that is, the height control plate 49 does not move up and down, and only the upper sensor 73a of the upper and lower sensors 73a and 73b moves in the vertical direction with the height control plate 49. When in the overlapped state, the lifting piston rod 622a is not driven.

  Next, with reference to FIG.1 and FIG.17, the structure of the 1st pressurization apparatus 63 arrange | positioned at the 1st pressurization part D is demonstrated. Here, FIG. 17 is a cross-sectional view of the first pressurizing device 63 in the conveyance orthogonal direction.

  The first pressurizing device 63 includes a vertical pressurizing device 63a that pressurizes the box from above, and a lateral pressurizing device 63b that pressurizes the box from the conveyance orthogonal direction of the box.

  The vertical pressurizing device 63a has an elevating cylinder housing 631a and an elevating piston rod 632a that moves forward and backward with respect to the elevating cylinder housing 631a, and an attachment member 633a that extends in the conveying direction at the tip of the elevating piston rod 632a. The height control sensor 75 is attached to the upstream end of the attachment member 633a in the transport direction, and the height control plate 76 is attached to the downstream end. .

  The attachment member 633a is guided in the ascending / descending direction by a pair of elevating guide bars 643a.

  Further, a pressure cylinder housing 634a is attached to the lower surface of the attachment member 633a, and the pressure piston rod 635a advances and retreats with respect to the pressure cylinder housing 634a.

  A first roller holding member 637a is fixed to the tip of the pressure piston rod 635a via a second flange plate 636a. The first roller holding member 637a extends in the transport direction, and the cross-sectional shape in the transport orthogonal direction is formed in a U shape in which the left and right sides are bent downward.

  A plurality of elongated holes (not shown) are formed in the bent direction of the first roller holding member 637a in the transport direction, and the first arm rotation shaft 640a is engaged with each elongated hole. .

  A plurality of second arm rotation shafts 641a are fixedly disposed below the first arm rotation shaft 640a at the bent portion of the first holding member 637a. A pair of arm members 639a are rotatably supported with respect to the rotating shafts 640a and 641a.

  A first pressure roller 638a is pivotally supported at the tip of each of the pair of arm members 639a so as to pass.

  The first roller holding member 637a is provided with a roller height detection sensor 78, and the stroke amount of the pressure piston rod 635a is determined based on the detection result of the roller height detection sensor 78.

  The first and second arm rotation shafts 640a and 641a are connected by an arm drive spring 642a, the pressure piston rod 634a is driven in the extending direction, and the first pressure roller 638a contacts the lateral flap. In this state, the first arm rotating shaft 640a moves while charging the arm driving spring 642a in the extending direction in the elongated hole portion. The arm member 639a rotates about the second arm rotation shaft 641a by the spring force of the charged arm drive spring 642a, and the first pressure roller 638a presses the lateral flap in the folded state. It has become.

  Next, the configuration of the lateral pressure device 63b will be described with reference to FIGS. A pair of lateral pressurization devices 63b are provided on the left and right sides in the transport direction, and have a pressurization cylinder housing 631b and a pressurization piston rod 632b that moves forward and backward with respect to the pressurization cylinder housing 631b. A flange plate 633b is attached to the tip of the pressure piston rod 632b.

  A second roller holding member 634b is attached to the flange plate 633b. The second roller holding member 634b has a pair of bent portions whose upper and lower sides are bent in the pressing direction of the lateral pressing device. The second pressure roller 635b is pivotally supported so as to pass between the pair of bent portions of the second roller holding member 634b, and a plurality of the second pressure rollers 635b are arranged in parallel in the transport direction.

  Next, the operation of the first pressure device 63 will be described.

  When the box passes by the side of the first pressure raising / lowering sensor 77 disposed on the side of the third belt conveyor 13 at the rear end in the transport direction of the third belt conveyor 13, the first pressure raising / lowering sensor 77 is The on / off control of the first pressurizing device 63 is started by switching from on to off. Since this raising / lowering control is performed based on the on / off state of the height control sensor 75 similarly to the raising / lowering control of the rear flap folding / sticking device 61, description thereof is omitted.

  Then, when the lifting control is finished, the next box enters the third belt conveyor 13, and when the front end of the box passes the side of the lateral compression detection sensor 43, the lateral compression detection sensor 43 is turned on. Pressurization processing by the vertical pressurizing device 63a and the lateral pressurizing device 63b is started.

  The pressurizing process by the vertical pressurizing device 63a determines the stroke amount of the pressurizing piston rod 635a based on the detection result by the roller height detection sensor 78, and the first pressurizing roller 638a is folded. This is done by pressing from above. Thereby, a lateral flap is pressed with respect to a front flap and a back flap, and adhesion | attachment by an adhesive agent can be performed reliably.

  In the pressure treatment by the lateral pressure device 63b, the pressure piston rod 632b of the pair of lateral pressure devices 63b is driven in the extending direction to bring the second pressure roller 635b into pressure contact with the box from the conveyance orthogonal direction. To do. As a result, crops such as fruits can enter and pressurize the box that swells in the horizontal direction in the direction perpendicular to the conveyance direction. Therefore, the first pressure roller 638a is attached with the end surfaces of the pair of horizontal flaps attached together. The pressurizing process can be performed.

  When the box passes by the side of the compression return sensor 44, the pressure piston rods 635a and 632b are driven in the shortening direction, and the compression process by the vertical pressure device 63a and the horizontal pressure device 63b is completed.

  The compressed box is transferred from the third belt conveyor 13 to the fourth belt conveyor 14, and is pressurized by the second pressure device 64.

  Next, with reference to FIG.1 and FIG.18, the 2nd pressurization apparatus 64 arrange | positioned at the 2nd pressurization part E is demonstrated. Here, FIG. 18 is a cross-sectional view in the transport direction of the second pressurizing device 64.

  The second pressurizing device 64 has an elevating cylinder housing 64a and an elevating piston rod 64b that moves forward and backward with respect to the elevating cylinder housing 64a. A rectangular parallelepiped mounting member is provided at the tip of the elevating piston rod 64b. 64d is provided extending in the transport direction, and a height control sensor 83 is attached to an end of the attachment member 64d on the upstream side in the transport direction.

  The mounting member 64d is guided in the ascending / descending direction by a pair of elevating guide bars 64e.

  Further, a pressure cylinder housing 64f is attached to the lower surface of the attachment member 64d, and the pressure piston rod 64g advances and retreats with respect to the pressure cylinder housing 64f.

  A pressure roller holding member 64i is fixed to the tip of the pressure piston rod 64g. The pressure roller holding member 64i extends in the conveyance direction, and the cross-sectional shape in the conveyance orthogonal direction is formed in a U shape in which the left and right sides are bent downward.

  A plurality of pressure rollers 64j are arranged side by side in the transport direction, and the rotation shaft of each pressure roller 64j is rotatably supported by the lower ends of the pair of arm members 64h.

  A spring mounting pin 64k is provided at the upper end of the pair of arm members 64h, and the spring mounting pin 64k is movable to a long hole 64l formed in a bent portion 641i of the pressure roller holding member 64i. Is engaged.

  Further, the pair of arm members 64h are rotatably engaged with an arm rotation shaft 64m fixed so as to be passed to the bending portion 641i of the pressure roller holding member 64i.

  A sprocket 64p is rotatably supported on the bending portion 641i of the pressure roller holding member 64i, and is wound around a rotating belt 64q. A plurality of pressure rollers are provided on the inner peripheral surface of the rotating belt 64q. 64j is in contact.

  One end of the arm drive spring 64r is fixed to a spring mounting pin 64k of the arm member 64h, and the other end is connected to an arm rotation shaft 64m of another arm member h that is disposed adjacent to the rear of the arm member 64h in the transport direction. It is fixed. As for the arm drive spring 64r for driving the arm member 64h arranged most rearward in the transport direction, the other end of the arm drive spring 64r is fixed to the bent portion 641i of the pressure roller holding member 64i. It is fixed to.

  Next, the operation of the second pressure device 64 will be described.

  When the box passes by the side of the second pressure raising / lowering sensor 79 provided at the rear end in the transport direction of the fourth belt conveyor 13, the second pressure raising / lowering sensor 79 switches from on to off, and the lifting piston rod 64b is moved. The raising / lowering control of the 2nd pressurization apparatus 64 by extending | stretching or shortening is started. Since this raising / lowering control is performed based on the on / off state of the height control sensor 83, similarly to the raising / lowering control of the rear flap folding / sticking device 61, description thereof is omitted.

  When the lifting control is finished, the next box enters the fourth belt conveyor 14, and when the leading end of the box passes the side of the compression detection sensor 45, the compression detection sensor 45 is turned on, and the second The compression process by the pressure device 64 is started.

  In the pressurizing process by the pressurizing device 64, first, the stroke amount of the pressurizing piston rod 64g is determined based on the detection result by the roller height detecting sensor 80, and the pressurizing roller 64j is viewed from above the lateral flap in the folded state. Press contact. Then, the arm member 64h rotates in the clockwise direction around the arm rotation shaft 64m, and the spring mounting pin 64k moves in the elongated hole portion 64l to pull the arm drive spring 64r to the arm member 64h. A rotational force in the circumferential direction is applied. As a result, the lateral flaps in the folded state are further pressed from above by the plurality of pressure rollers 64j, and the lateral flaps can be reliably bonded to the front flaps and the rear flaps.

  As described above, in this embodiment, the height control plate provided in the front-stage sealing processing unit is controlled to be lifted and lowered in the subsequent-stage sealing processing unit based on the overlap and non-overlap in the lifting direction of the pair of control sensors. Since it can be performed, it is not necessary to once return to the initial position when raising / lowering the subsequent sealing processing unit, and each processing unit can be quickly moved to a height for processing the box.

  Next, with reference to FIGS. 1-4, the control means which controls the rotational speed of the 1st-4th belt conveyor is demonstrated in detail. Here, FIG. 2 shows a flowchart illustrating a control procedure for controlling the rotational speed of the first belt conveyor 11, and FIG. 3 is for controlling the rotational speed of the third belt conveyor 13. FIG. 4 is a flowchart illustrating a control procedure for controlling the rotation speed of the fourth belt conveyor 14. In this embodiment, the rotation speed of the second belt conveyor 12 corresponding to the horizontal flap folding process is set to a constant speed, and speed control is not performed.

When the stopper 31 is retracted from the inlet conveyor 10, the box is possess the introduction conveyor 10 to the first belt conveyor 11 driven at the conveying speed v _0.

  The first belt conveyor 11 is wound around a first pulley 51b, and the first pulley 51b is connected to the output shaft of the first motor 51a via a transmission mechanism (not shown). The first motor 51a incorporates a control circuit (not shown) that controls the rotational speed of the first motor 51a, and the rotational speed of the first belt conveyor 11 is controlled by the control circuit.

  A hammer start sensor 41 is provided at the start of the first belt conveyor 11 on the side of the first belt conveyor 11. When the tip of the box passes by the hammer start sensor 41, the hammer start sensor 41 is provided. Is turned on (step S101).

  Then, when the box is further conveyed downstream in the conveyance direction and the rear end of the box passes the side of the hammer start sensor 41, the hammer start sensor 41 is switched from on to off (step S102).

When the hammer start sensor 41 is switched from ON to OFF, the transport speed of the first belt conveyor 11 is reduced from V ₀ to V ₁ (step S103), and at the same time, the hammer 611b starts rotating in the counterclockwise direction. To do. Then, from the rear of the box conveyed on the first belt conveyor 11 at a speed V ₁ of the after deceleration, hammer 611b is closer, by the hammer 611b abuts, folding process of the rear flap is performed.

  Thereafter, the box is further conveyed downstream in the conveyance direction, and when the tip of the box passes the side of the hammer return sensor 42, the hammer return sensor 42 is turned on (step S104), and the box is further conveyed downstream in the conveyance direction. When the rear end of the box passes by the hammer return sensor 42, the hammer return sensor 42 is switched from on to off (step S105).

When switched to the hammer back off sensor 42 from ON, the conveying speed of the first belt conveyor 11 is accelerated from the speed V ₁ to velocity V ₀ (step S106), the same rotational movement hammer 611b is in the clockwise direction at the same time And return to the initial position shown in FIG.

The box transported at this speed V ₀ is transferred to the second belt conveyor 12 after the adhesive is applied at the adhesive application portion 61d.

The second belt conveyor 12 is wound around a second pulley 52b, and the second pulley 52b is connected to the output shaft of the second motor 52a via a transmission mechanism (not shown). . The conveying speed of the second bell conveyor 12 is set to a constant speed v _0.

  A lateral flap folding process is performed by the lateral flap folding device 62 on the second belt conveyor 12, and details will be described later.

  The box in which the lateral flap is folded moves from the second belt conveyor 12 to the third belt conveyor 13.

  The third belt conveyor 13 is wound around a third pulley 53b, and the third sprocket 53b is connected to the output shaft of the third motor 53a via a transmission mechanism (not shown). The third motor 53a incorporates a control circuit (not shown) that controls the rotation speed of the third motor 53a, and the rotation speed of the third belt conveyor 13 is controlled by the control circuit.

  A lateral compression detection sensor 43 is provided on the side of the third belt conveyor 13 slightly upstream from the center of the third belt conveyor 13, and downstream of the lateral compression detection sensor 43 (compression unit 63e). A lateral compression return detection sensor 44 having a configuration substantially similar to that of the lateral compression detection sensor 43 is provided slightly upstream from the right end of the horizontal compression detection sensor 43.

  As shown in the flowchart of FIG. 3, when the front end of the box that has entered the third belt conveyor 13 passes the side of the lateral compression detection sensor 43, the lateral compression detection sensor 43 is turned on (step S201).

When the lateral compression detection sensor 43 is turned on, the conveying speed of the third belt conveyor 13 is decelerated from the speed v ₀ to v ₃ (step S202), and the box is slowly moved at the decelerated speed v ₃ . A pressure process by the first pressure device 63 is performed while being conveyed.

  The box body is transported downstream in the transport direction while being pressurized by the first pressurizing device 63, and when the front end of the box body passes the lateral compression return detection sensor 44, the lateral compression return detection sensor 44 is turned on. (Step S203).

  When the box is further conveyed downstream in the conveyance direction and the pressurizing process for the box is almost finished, the rear end of the box passes by the side of the lateral compression return detection sensor 44 and the lateral compression return detection sensor 44 is turned on. To OFF (step S204).

The lateral compression return detecting sensor 44 is switched from ON to OFF, the third conveying speed of the belt conveyor 13 is accelerated from v ₃ to v ₀ (step S205), pressure-treated box after accelerated Is transferred at the transfer speed v ₀ and transferred to the fourth belt conveyor 14.

  The fourth belt conveyor 14 is engaged with the fourth sprocket 54b, and the fourth sprocket 54b is connected to the output shaft of the fourth motor 54a via a transmission mechanism (not shown). . The fourth motor 54a incorporates a control circuit (not shown) that controls the rotational speed of the fourth motor 54a, and the rotational speed of the fourth belt conveyor 14 is controlled by the control circuit.

  A vertical compression start sensor 45 is provided slightly downstream from the starting end of the fourth belt conveyor 14, and a vertical compression start detection sensor 45 is provided slightly upstream from the end of the fourth belt conveyor 14. An up / down compression return detection sensor 46 having substantially the same configuration is provided.

  As shown in the flowchart of FIG. 4, when the front end of the box that has entered the fourth belt conveyor 14 passes the side of the vertical compression start sensor 45, the vertical compression start sensor 45 is turned on (step S301).

When vertical compression start sensor 45 is turned on, the fourth belt conveyor 14 decelerates from the speed _{v 0} to _{v 4} (step S302), pressure treatment by the second pressure device 64 is started.

  When the front end of the box body that is being pressurized by the second pressurizing device 64 and is transported downstream in the transport direction passes the side of the top and bottom compression return detection sensor 46, the top and bottom compression return detection sensor 46 is turned on (step). S303).

  When the box is further conveyed downstream in the conveying direction and the pressurizing process for the box is almost finished, the rear end of the box passes by the side of the vertical compression return detection sensor 46, and the vertical compression return detection sensor 46 is turned on. To OFF (step S304).

When the upper and lower compression return detecting sensor 46 is switched from ON to OFF, the fourth conveying speed of the belt conveyor 14 is accelerated from v ₄ to v ₀ (step S305), treated pressurized box after accelerated It is transported in the transport direction downstream at a speed v ₀ of the.

  As described above, in this embodiment, the conveying speeds of the first belt conveyor 11, the third belt conveyor 13, and the fourth belt conveyor 14 are respectively set to the rear flap folding / adhesive application unit B and the first pressurization. It is set according to each process in the part D and the second pressure part E. Thereby, it is not necessary to set the rotation speed of the belt conveyor to a low speed in accordance with the process that takes the most work time as in the prior art, and the work efficiency can be improved.

Schematic diagram of the sealing device The flowchart which illustrated the control procedure of the rotational speed of the 1st belt conveyor The flowchart which illustrated the control procedure of the rotational speed of a 3rd belt conveyor The flowchart which illustrated the control procedure of the rotational speed of a 4th belt conveyor Layout of front flap folding unit and rear flap folding / sticking device waiting at the initial position Layout when the front flap folding unit is lowered to the folding position Layout when rear flap folding / sticking device 61 is lowered The arrangement | positioning figure which showed the state by which the front flap folding unit retracted upwards from the folding position, and the box was conveyed downstream in the conveyance direction by releasing the stopper. Cross-sectional view of a contact folding device illustrating the arrangement of the flap detection device Operation explanatory diagram of the contact folding device illustrating how the front flap is folded Cross-sectional view of the front flap lifting device and centering device in the conveyance orthogonal direction Operation explanatory diagram of rear flap folding and sticking device driven up and down based on detection result of height control sensor Flow chart showing the control procedure for controlling the height of the rear flap folding and sticking device Top view of horizontal flap folding device Operation explanatory diagram of the lateral flap folding device driven up and down based on the detection result of the height control sensor It is a flowchart for demonstrating the height control of a horizontal flap. Sectional drawing of the 1st pressurizer 63 of the conveyance orthogonal direction Sectional view in the conveying direction of the second pressurizing device Cross-sectional view of a conventional sealing device

Explanation of symbols

10 Introduction conveyor
11 First belt conveyor
12 Second belt conveyor
13 Third belt conveyor
14 Fourth belt conveyor
31 Stopper
32 Centering device
41 Hammer start sensor
42 Hammer return sensor
43 Lateral compression detection sensor
44 Horizontal compression return detection sensor
45 Compression detection sensor
46 Compression return sensor
47 Box detection sensor
48 73 75 83 Height control sensor
49 74 76 606 Height control board
60 Front flap folding unit
61 Rear flap folding and sticking device
62 Horizontal flap folding device
63 First pressurizing device
64 Second pressurizing device
71 Pre-adhesive application sensor
72 Post-adhesive application sensor
78 80 Roller height detection sensor
79 Second pressurization lift sensor
81 Rear flap folding sensor
82 Horizontal flap folding sensor

Claims (10)

The first processing unit performs folding processing of the front flap while transporting the box body in which the front and rear and side flaps are opened by the transporting means, and the second processing unit is disposed at the rear stage of the first processing unit. The processing unit performs the folding process of the rear flap, performs the process of applying an adhesive to the folded front and rear flaps, and performs the horizontal processing in the third processing unit disposed at the subsequent stage of the second processing unit. A box sealing apparatus that performs a flap folding process and performs a process of pressurizing at least the upper surface of the box in a fourth processing unit disposed at a subsequent stage of the third processing unit,
The transport means includes a first transport means corresponding to the first processing section, a second transport means corresponding to the second processing section, and a third transport corresponding to the third processing section. And a fourth transport unit corresponding to the fourth processing unit,
Speed control means for controlling the transport speed of each transport means to a speed according to the processing of each processing section;
The box control device according to claim 1, wherein the speed control means changes the transport speed of the corresponding transport means in accordance with at least the processing in the second and fourth processing sections.   The speed control means changes the second and fourth transport speeds, respectively, when the box reaches each predetermined position of the second and fourth transport means. A box sealing device according to claim 1. The second processing unit is provided with a hammer that swings in a pendulum manner to come in contact with the rear flap of the box body from the upstream in the conveying direction,
When the rear flap is folded, the speed control means makes the transport speed of the second transport means slower than the hammer speed of the hammer and transports the transport speed of the second transport means before and after folding the rear flap. The box sealing device according to claim 1, wherein the box sealing device is slower than the speed.   The speed control unit controls the fourth transport unit so that a transport speed when performing the pressurizing process in the fourth processing unit is slower than a transport speed before and after the pressurizing process. The box sealing device according to any one of claims 1 to 3.   The box sealing device according to any one of claims 1 to 4, wherein the fourth processing unit is provided with a lateral compression unit that pressurizes the box from the side. A fifth processing unit that pressurizes the upper surface of the box body is provided at the subsequent stage of the fourth processing unit,
The transport means includes fifth transport means corresponding to the fifth processing unit,
The box according to any one of claims 1 to 5, wherein the speed control unit changes a transport speed of the fifth transport unit in accordance with processing in the fifth processing unit. Body sealing device. A plurality of boxes having different heights with front and rear and side flaps in an open state can be continuously transported by the transport means, and the flaps of the box can be folded using a plurality of processing units arranged in parallel in the transport direction. A sealing device for folding and sticking processing,
Among the plurality of processing units, when the processing unit arranged in the front and back in the transport direction and disposed upstream is a front processing unit, and the processing unit disposed downstream is a rear processing unit,
A previous lifting mechanism for moving up and down the previous processing section;
A rear lifting mechanism for moving up and down the latter processing section;
Elevating control means for controlling the elevating position of the latter processing unit by the elevating mechanism of the latter stage,
The up-and-down control means detects the relative positions of the front-stage and the rear-stage processing units when the front-stage processing unit moves up and down to a processing position for processing the box, and based on the detection result, the processing position The box is sealed so that the subsequent processing unit is controlled to move to a position corresponding to the first processing unit, and the second processing unit is not moved up and down when the previous processing unit does not move up and down. apparatus. A height control plate disposed at the rear end in the transport direction of the preceding processing unit;
A height control sensor disposed at the front end in the transport direction of the latter processing unit,
The height control plate and the height control sensor are arranged at overlapping positions in the transport direction, and the height control sensor is in accordance with overlapping and non-overlapping with respect to the height control plate in the ascending / descending direction. , Sensor output switches,
The up-and-down control means moves the subsequent-stage processing unit up and down to a position corresponding to the processing position based on a change in sensor output of the height control sensor before and after the preceding-stage processing unit moves to the processing position. The box sealing device according to claim 7, wherein the box sealing device is controlled as follows.   The up-and-down control means starts the up-and-down movement to a position corresponding to the processing position of the subsequent processing section when the box to be processed reaches a predetermined position in the transport means. The box sealing device according to claim 7 or 8. The processing unit in the previous stage is
A contact fold part that folds the front flap by contacting the front flap of the box,
A flap detection sensor that is provided in the contact folding portion and emits light obliquely in the horizontal direction with respect to the conveying direction;
Horizontal moving means for moving the contact folding portion upstream in the conveying direction;
A contact fold-in part control means for controlling the driving of the preceding-stage lifting means and the horizontal movement means,
The contact folding part control means moves the contact folding part upstream in the conveying direction when the flap detection sensor performs lateral flap detection while lowering the contact folding part. The box sealing device according to any one of claims 7 to 9, wherein a front flap folding operation is performed by the folding portion.

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