Residue recovery system and case manufacturing apparatus

Abstract

To provide a residue recovery system capable of recovering residue adhering to a nozzle emitting a jet of paste, without stopping an apparatus for manufacturing a product that is a paste injection object.SOLUTION: A residue recovery system according to the present disclosure comprises: a conveyance part which is arranged vertically above a first conveyance path extending in a first direction where a workpiece is conveyed, which receives residue, produced from above in a vertical direction, above the first conveyance path, and which conveys the residue to an area outside the first conveyance path, in a plan view; a drive part that drives the conveyance part; and a storage part that recovers the residue conveyed by the conveyance part.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present disclosure relates to a residue recovery device and a case manufacturing device.

Background Art

[0002] For example, a corrugated sheet as packaging for cans or bottles of beverage products is bent into a box shape on a production line and glued using hot melt. While the box is being conveyed at a constant pitch by a conveyor, glue is sprayed from the nozzle of an injection gun located upstream of the gluing area onto the gluing area standing upright at the upper end of the box at a predetermined gluing position. Due to variations in the trajectory of the glue while it moves through space after being ejected from the nozzle, or variations in the position of the gluing area due to warping of the sheet, etc., the application position varies. Patent Document 1 discloses a glue receiver that is disposed on a conveying path, is displaced integrally with an injection device for spraying glue, and receives the glue adhering to the nozzle from below. To have an operator collect the glue accumulated in the glue receiver disposed on the conveying path and displaced integrally with the injection device, it is necessary to stop the case manufacturing device, so the operating rate of the case manufacturing device decreases.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] A part of the glue ejected from the injection device adheres to the nozzle and becomes a residue. Patent Document 1 points out that, as one of the causes of the residue, the glue drawn out in a filamentous form from the nozzle to the gluing area breaks and the glue returns to the nozzle. It is required to process the residue adhering to the nozzle while maintaining the operating rate of the case manufacturing device.

[0005] As described above, an object of the present disclosure is to provide a residue recovery device that can recover residues adhering to a nozzle for injecting glue without stopping the manufacturing device of a product to which the glue is to be injected.

Means for Solving the Problems

[0006] The residue recovery device according to the present disclosure is disposed above the vertical direction of a first conveyance path extending in a first direction in which a workpiece is conveyed, receives residues generated from above in the vertical direction above the first conveyance path, and when viewed in plan, a conveyance unit that conveys the residues to a region outside the first conveyance path, a drive unit that drives the conveyance unit, and a storage unit that recovers the residues conveyed by the conveyance unit.

Effects of the Invention

[0007] According to the present disclosure, it is possible to provide a residue recovery device that can recover residues adhering to a nozzle for injecting glue without stopping the manufacturing device of a product to which the glue is to be injected.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Modes for Carrying Out the Invention

[0009] Hereinafter, embodiments of the present disclosure will be described by taking, as an example, an apparatus for manufacturing a box-shaped case by bending a cardboard sheet. In the following description, there are three modes, namely, a first embodiment, a second embodiment, and a third embodiment, depending on the difference in the means for discharging residues. In the first embodiment, residues are placed on a conveyor moving linearly and discharged. In the second embodiment, residues are pushed out and discharged by a pusher capable of reciprocating movement. In the third embodiment, residues are placed on a screw rotating in a circular motion and discharged.

[0010] The residue in this embodiment is an adhesive that functions as a paste called hot melt, and a part of it sprayed from the nozzle adheres to the nozzle, which is a solid that can be called paste residue. The discharge of residues in this embodiment means transporting the paste residues from the position where the paste residues that freely fall are received to the non-conveying position where the cardboard sheet in the case manufacturing process deviates from the conveying path 11. Hereinafter, the first embodiment, the second embodiment, and the third embodiment will be described in this order.

[0011] [First Embodiment] (Outline of Case Manufacturing Apparatus) Hereinafter, the first embodiment of the present disclosure will be described with reference to the accompanying drawings. The case manufacturing apparatus 1 is an apparatus for forming a sheet C into a box-shaped case by applying paste and bending. The sheet C is made of, for example, a cardboard sheet. As shown in FIG. 1, the case manufacturing apparatus 1 includes a conveying device 10 that conveys the sheet C in the conveying direction X, a bending guide 20 that bends the sheet C conveyed by the conveying device 10, a paste injection device 30 that injects paste at the pasting position of the sheet C conveyed by the conveying device 10, and a residue recovery device 40 that discharges the paste residues that fall from the injection nozzle of the paste injection device 30. The case manufacturing apparatus 1 includes a control unit 50 that controls the operations of the conveying device 10, the paste injection device 30, and the residue recovery device 40. In the embodiment, as shown in FIG. 1 and the like, the conveying direction X, the width direction Y, and the vertical direction Z are defined. The width direction Y is parallel to the horizontal direction and orthogonal to the conveying direction X.

[0012] (Configuration and Operation of Conveyor Device 10) The conveyor device 10 is, for example, a chain conveyor device that places a sheet C as a conveyed object on a flat plate attached to a chain and conveys it along a conveyance path 11. The chain conveyor device as the conveyor device 10 includes a sprocket driven by a drive motor, a chain around which the sprocket is hung and on which a flat plate for placing the conveyed object is disposed, and guides disposed on both sides in the width direction of the chain. The chain conveyor device as the conveyor device 10 controls the drive motor by a control unit 50 described later, and conveys the sheet C supplied from a supply unit (not shown) at a predetermined supply amount at a predetermined speed, or stops it at a predetermined position.

[0013] (Configuration and Operation of Bending Guide 20) The bending guide 20 bends a corresponding region of the sheet C in the sheet C conveyed by the conveyor device 10. In the present embodiment, the sheet C is conveyed by the conveyor device 10, and the upper surface panel C2 on the upper side in the vertical direction Z of the sheet C is bent to a predetermined position by contacting the bending guide 20. The bending guide 20 is continuous from an inclined portion 21 that forms a predetermined angle with respect to the conveyance path 11 of the conveyor device 10 to a parallel portion 22 parallel to the conveyance path 11. The upper surface panel C2 is bent by contacting from the inclined portion 21 to the parallel portion 22. As shown in FIG. 2, as an example, three bending guides 20 are arranged at equal intervals in the width direction Y.

[0014] (Configuration and Operation of Adhesive Injection Device 30) The paste injection device 30 injects a fluid paste and applies the paste to the application surface C11A of the seam C11 that stands upright upward continuously from the surface C1 of the sheet C. When the paste injection device 30 injects the paste, since the upper panel C2 of the sheet C is bent from the downstream to the upstream of the conveyance path 11 by the bending guide 20, the inner surface of the sheet C is covered by the upper panel C2. Although there is a variation in the position due to the warp of the sheet C, the application surface C11A is basically orthogonal to the conveyance direction X.

[0015] The paste injection device 30 is located above the conveyance path 11 along which the sheet C is conveyed and is arranged above the parallel portion 22 of the bending guide 20. Also, in the conveyance direction X, the paste injection device 30 is arranged on the downstream side of the position where the inclined portion 21 and the parallel portion 22 of the bending guide 20 are continuous.

[0016] The paste injection device 30 includes a paste storage portion 31 that stores the paste to be injected and a nozzle 33 that injects the paste stored in the paste storage portion 31. The paste injection device 30 injects the paste from the nozzle 33 by applying compressed air to the paste stored in the paste storage portion 31. Further, the nozzle 33 extending in the injection direction of the paste injected from the paste injection device 30 is arranged at a predetermined angle with respect to the conveyance path 11 of the conveyance device 10. The paste storage portion 31 stores the paste supplied from a paste supply source (not shown) through a hose or the like inside. The nozzle 33 is connected to the paste storage portion 31. Due to the compressed air supplied to the paste storage portion 31, the pressure inside the paste storage portion 31 increases, and pressure is applied to the paste, so that the paste is injected from the injection port 33A of the nozzle 33 toward the application surface C11A. For the paste injected by the paste injection device 30, for example, a so-called hot melt whose viscosity increases when heated is used.

[0017] As shown in FIG. 2, as an example, two paste injection devices 30 are arranged side by side in the width direction Y. Each paste injection device 30 includes three nozzles 33. In this embodiment, two pasting injection devices 30 are arranged side by side in the width direction Y, and each pasting injection device 30 is provided with three nozzles 33, but the present invention is not limited to this. In order to correspond to the size of the sheet C in the width direction Y, the number of pasting injection devices 30 may be changed, or the number of nozzles 33 provided in the pasting injection device 30 and the arrangement interval of the nozzles 33 in the width direction Y may be changed.

[0018] (Configuration and Operation of Residue Recovery Device 40) The residue recovery device 40 is a device that receives paste residues dripping from the nozzles 33 arranged on the conveyance path 11, conveys the paste residues from the received position to the area R outside the conveyance path 11, and then recovers them. The residue recovery device 40 can recover the paste residues adhering to the nozzles 33 without being sprayed from the nozzles 33, without stopping the operation of the conveyance device 10 and the pasting injection device 30 of the case manufacturing device 1.

[0019] In this embodiment, the residue recovery device 40 is a residue recovery device that conveys residues by an endless belt and recovers the residues. The residue recovery device 40 includes an endless conveyor belt 41, an electric motor 42 that is a driving source of the conveyor belt 41, a driving-side pulley 43 that transmits the rotational driving force of the electric motor 42 to the conveyor belt 41, and a driven-side pulley 44 that supports the conveyor belt 41 together with the driving-side pulley 43. Further, the residue recovery device 40 includes a detected object 45 attached to the driven-side pulley 44, and a detection sensor 46 that detects the detected object 45 rotating together with the driven-side pulley 44. Furthermore, the residue recovery device 40 includes a scraper 47 that scrapes and removes paste residues placed on the conveyance surface of the conveyor belt 41 from the conveyance surface of the conveyor belt 41, a recovery box 48 as a housing part that recovers the paste residues scraped by the scraper 47 from the conveyor belt 41, and a residue detection part 49 that detects paste residues deposited on the conveyance surface of the conveyor belt 41.

[0020] The conveyor belt 41 receives the paste residue dripping from the nozzle 33 disposed on the conveyance path 11 and conveys the residue at a predetermined speed. The conveyor belt 41 is disposed so as to protrude to the downstream side in the conveyance direction X as the first direction in which the sheet C is conveyed, relative to the nozzle 33. Further, the conveyor belt 41 is disposed below the passage path of the paste jetted from the nozzle 33. The conveyor belt 41 has a release layer formed on at least a part of the conveyance surface on which the paste residue is placed and conveyed, the release layer being formed so that the paste residue can be easily peeled off. As an example, the release layer is made of a fluororesin and is formed of PTFE or PFA or the like.

[0021] The detected object 45 is composed of a plurality of teeth protruding radially outside the driven pulley 44. The detection sensor 46 detects whether the conveyor belt 41 is operating or not by determining whether the driven pulley 44 is rotating or not, based on the repetition of the detection of the presence or absence of the plurality of teeth of the detected object 45.

[0022] The scraper 47 as a removal unit contacts the conveyance surface of the conveyor belt 41 wound around the driving pulley 43, and removes the paste residue adhering to the conveyance surface of the conveyor belt 41 by scraping it off from the conveyor belt 41. By including the scraper 47, the residue recovery device 40 can remove the paste residue from the conveyor belt 41. The recovery box 48 receives and stores the paste residue scraped by the scraper 47. The scraped paste residue freely falls into the recovery box 48 after passing through the surface of the scraper 47. Therefore, the recovery box 48 is disposed below the scraper 47 in the region R outside the conveyance path 11 of the conveyance device 10 in a plan view. Further, the collection box 48 includes a light emitter 48A as a full detection unit that detects when the glue residue contained therein is full, and a light receiver 48B. The light emitter 48A and the light receiver 48B are transmissive photoelectric sensors installed facing each other. The light emitter 48A and the light receiver 48B detect the glue residue collected up to a predetermined height of the collection box 48. Detecting the glue residue when the light emitter 48A and the light receiver 48B as the full detection unit are deposited up to a predetermined position means that the residue deposited between the light emitter 48A and the light receiver 48B continues to stay, the light reception amount of the light receiver 48B is lower than the light emission amount of the light emitter 48A, and it refers to the case when the decrease in the light reception amount continues for a predetermined time.

[0023] The residue detection unit 49 is received by an endless belt as the conveyor belt 41 and detects the glue residue when it is deposited up to a predetermined position. The residue detection unit 49 is a transmissive photoelectric sensor in which a light emitter 49A and a light receiver 49B are installed facing each other. The detection of the glue residue by the residue detection unit 49 may detect the height deposited in the direction of the vertical direction Z, or may detect the glue residue spread in the direction of the transport direction X due to the deposition of the glue residue. Note that detecting the glue residue when the residue detection unit 49 is deposited up to a predetermined position means that the residue deposited between the light emitter 49A and the light receiver 49B continues to stay, the light reception amount of the light receiver 49B is lower than the light emission amount of the light emitter 49A, and it refers to the case when the decrease in the light reception amount continues for a predetermined time.

[0024] From the above, the residue recovery device 40 is disposed above the vertical direction Z of the transport path 11 as the first transport path extending in the transport direction X as the first direction in which the sheet C is transported, receives the glue residue generated from above the vertical direction Z above the transport path 11 as the first transport path, and transports the glue residue to the region R outside the transport path 11 in a plan view. It preferably includes a conveyor belt 41, an electric motor 42 that drives the conveyor belt 41 without stopping the case manufacturing device 1 as a processing device that processes the sheet C, and a collection box 48 as a storage unit that collects the glue residue transported by the conveyor belt 41. As a result, the residue adhering to the nozzle 33 of the glue injection device 30 can be automatically collected without stopping the case manufacturing device 1 that forms the sheet C to which the glue is to be injected into a box-shaped case.

[0025] (Control method of the control unit 50) The control unit 50 controls each device of the case manufacturing device 1 that forms a box-shaped case by applying glue to the sheet C, folding it, and pressing it.

[0026] During the operation of the case manufacturing device 1, the control unit 50 continuously drives the electric motor 42 of the residue recovery device 40.

[0027] Further, after the glue injection device 30 has executed a predetermined number of glue injections, the control unit 50 may drive the electric motor 42 of the residue recovery device 40 for a predetermined time.

[0028] Further, when the residue detection unit 49 detects that the deposited glue residue has reached a predetermined position in the transport direction X, the control unit 50 may drive the electric motor 42 of the residue recovery device 40 for a predetermined time.

[0029] Further, when the residue detection unit 49 detects that the deposited glue residue has reached a predetermined height in the vertical direction Z, the control unit 50 may drive the electric motor 42 of the residue recovery device 40 for a predetermined time.

[0030] Further, when the sheet C is being transported below the residue recovery device 40 by the transport device 10, the control unit 50 stops the electric motor 42 of the residue recovery device 40, and when the sheet C is being transported at a position away from below the residue recovery device 40, the control unit 50 may drive the electric motor 42 of the residue recovery device 40.

[0031] Further, when the control unit 50 detects glue residue collected up to a predetermined height in the collection box 48 by the light projector 48A and the light receiver 48B, it can notify the operator to replace the collection box 48 by display on the monitor of the case manufacturing apparatus 1 (not shown) and alarm by the speaker. Thereby, it is possible to prevent the glue residue from overflowing from the collection box 48, and also possible to reduce the work load of the operator.

[0032] [Effects achieved by the first embodiment] The residue collection device 40 according to the first embodiment described above has the following effects. The residue collection device 40 includes a conveyor belt 41 that receives glue residue generated from above in the vertical direction Z above the conveyance path 11 and conveys the glue residue to the region R outside the conveyance path 11 in a plan view. Thereby, the glue residue adhering to the nozzle 33 that injects glue can be collected without stopping the case manufacturing apparatus 1 as the manufacturing apparatus of the sheet C to be the injection target of the glue.

[0033] The residue collection device 40 also includes a scraper 47 that contacts the conveyance surface of the conveyor belt 41 hung on the drive-side pulley 43 and removes the glue residue adhering to the conveyance surface of the conveyor belt 41. Thereby, the glue residue can be scraped off from the conveyor belt 41.

[0034] The residue collection device 40 includes a detected object 45 attached to the driven-side pulley 44 and a detection sensor 46 that detects the detected object 45 rotating together with the driven-side pulley 44. The detected object 45 is composed of a plurality of teeth protruding radially outside the driven-side pulley 44. Thereby, the detection sensor 46 can detect whether the conveyor belt 41 is operating or not by detecting whether the driven-side pulley 44 is rotating or not through the repetition of the detection of the plurality of teeth of the detected object 45.

[0035] The residue recovery device 40 includes a control unit 50 that controls each device of the case manufacturing device 1 that forms a box-shaped case by applying glue to the sheet C, folding it, and pressing it. During the operation of the case manufacturing device 1, the control unit 50 continuously drives the electric motor 42 of the residue recovery device 40. Thereby, the glue residue can be quickly recovered.

[0036] After the control unit 50 of the residue recovery device 40 causes the glue injection device 30 to execute glue injection a predetermined number of times, it drives the electric motor 42 of the residue recovery device 40 for a predetermined time. Thereby, the running cost of the residue recovery device 40 can be reduced, and the glue residue can be regularly recovered.

[0037] When the control unit 50 of the residue recovery device 40 is detected by the residue detection unit 49 that the deposited glue residue has reached a predetermined position in the conveying direction X, the control unit 50 may drive the electric motor 42 of the residue recovery device 40 for a predetermined time. Thereby, the glue residue can be automatically recovered without falling from the endless belt to the downstream side in the conveying direction X.

[0038] When the control unit 50 of the residue recovery device 40 is detected by the residue detection unit 49 that the deposited glue residue has reached a predetermined height in the vertical direction Z, the control unit 50 may drive the electric motor 42 of the residue recovery device 40 for a predetermined time. Thereby, the glue residue can be automatically recovered without the injection port 33A of the nozzle 33 being blocked by the deposited glue residue.

[0039] When the sheet C is being conveyed below the residue recovery device 40 by the conveying device 10, the control unit 50 of the residue recovery device 40 stops the electric motor 42 of the residue recovery device 40, and when the sheet C is being conveyed at a position away from below the residue recovery device 40, the control unit 50 may drive the electric motor 42 of the residue recovery device 40. As a result, even if a part of the paste residue adhering to the conveyor belt 41 passes without being scraped off by the scraper 47 and the paste residue adhering to the conveyor belt 41 is peeled off by the vibration of the conveyor belt 41 or the like, it is possible to avoid dropping onto the sheet C.

[0040] The detection sensor 46 detects whether the conveyor belt 41 is operating or not by detecting whether the driven pulley 44 is rotating or not as the detection of the presence or absence of a plurality of teeth of the detected object 45 is repeated, but it is not limited to this. For example, when detecting the current value of the electric motor 42, when the load on the electric motor 42 continuously decreases and the current value continuously decreases, it may be detected whether the conveyor belt 41 is operating or not. Further, a belt tension detection sensor may be pressed against the conveyor belt 41, and when the tension of the belt detected by the belt tension detection sensor suddenly decreases, it may be detected whether the conveyor belt 41 is operating or not. Also, as a belt detection unit for confirming the presence or absence of the conveyor belt 41 from above the conveyor belt 41, it may be detected whether the conveyor belt 41 is operating or not by, for example, a reflection type photoelectric sensor.

[0041] [Second Embodiment] Referring to FIG. 4, the second embodiment will be described. In the second embodiment, a residue recovery device 60 different from the residue recovery device 40 of the first embodiment will be described.

[0042] The residue recovery device 60 waits for paste residues such as droplets of paste ejected from the nozzle 33 when the paste is ejected by the paste ejection device 30 below, and conveys the deposited paste residues by a conveying unit that reciprocates a predetermined distance, and conveys them to the region R outside the conveying path 11 of the conveying device 10 where the sheet C is conveyed in a plan view.

[0043] The residue recovery device 60 includes a conveying unit 61 that pushes the paste residue in the width direction Y and conveys it to the area R outside the conveying path 11 of the conveying device 10, a driving unit 62 that reciprocates the conveying unit 61 by a predetermined distance, and a residue receiver 63 that waits for paste residues such as droplets of paste ejected from the nozzle below.

[0044] In this embodiment, the conveying unit 61 has a rectangular parallelepiped shape and includes a lower surface 61A and a pushing surface 61B. The lower surface 61A is placed on the conveying surface 63A above the residue receiver 63 in the vertical direction Z and slides on the conveying surface 63A of the residue receiver 63. That is, the conveying unit 61 also functions as a scraper 47 that scrapes and removes the paste residue received by the residue receiver 63 from the conveying surface 63A of the residue receiver 63. In the width direction Y, the stop position of the pushing surface 61B when the conveying unit 61 extends the most is a position beyond the Y-side end surface 63B. That is, the conveying unit 61 moves to a position that covers a part above the collection box 48.

[0045] In this embodiment, the driving unit 62 is a so-called driving actuator such as an air cylinder, and reciprocates the conveying unit 61 by a predetermined distance. By reciprocating the conveying unit 61 by a predetermined distance, the driving unit 62 conveys the paste residue deposited on the residue receiver 63 and conveys it to the area R outside the conveying path 11 of the conveying device 10 where the sheet C is conveyed when viewed in plan.

[0046] In this embodiment, the residue receiver 63 has a plate shape and includes a conveying surface 63A and a Y-side end surface 63B. The residue receiver 63 receives the paste residue on the conveying surface 63A, and the paste residue is scraped and removed by the conveying unit 61 that slides on the conveying surface 63A. A release layer is formed on the surface of the conveying surface 63A on which the paste residue is placed and conveyed on the residue receiver 63 to make it easier for the paste residue to peel off. As an example, the release layer is a fluororesin and is formed of PTFE, PFA, or the like.

[0047] After the paste injection device 30 executes the injection of paste a predetermined number of times by the control unit 50, the residue recovery device 60 drives the drive unit 62 of the residue recovery device 60, so that the paste residue is conveyed by the conveying unit 61. When the extrusion surface 61B of the conveying unit 61 moves to a position exceeding the Y-side end surface 63B, the scraped paste residue falls into the recovery box 48 arranged in the region R outside the conveying path 11 and is recovered.

[0048] [Effects achieved by the second embodiment] In the residue recovery device 60 in the second embodiment as well, residues such as droplets of paste ejected from the nozzle 33 of the paste injection device 30 can be automatically recovered without stopping the case manufacturing device 1.

[0049] [Third embodiment] Referring to FIG. 5, the third embodiment will be described. In the third embodiment, a residue recovery device 70 different from the residue recovery device 40 of the first embodiment will be described.

[0050] The residue recovery device 70 waits for paste residues such as droplets of paste ejected from the nozzle 33 when the paste is ejected by the paste injection device 30, and conveys the paste residues by the rotation of the screw blades of the screw conveyor as the conveying unit 71, and is a device that conveys the paste residues to the region R outside the conveying path 11 of the conveying device 10 where the sheet C is conveyed when viewed in plan.

[0051] The residue recovery device 70 includes a conveying unit 71 that conveys the paste residue by the rotation of the screw blade 71A, and a drive unit 72 that rotates the screw blade 71A.

[0052] In this embodiment, the conveying unit 71 is a screw conveyor, and includes a screw blade 71A and a casing 71B. The conveying unit 71 is disposed below the nozzle 33 of the glue injection device 30. The casing 71B of the conveying unit 71 houses the screw blade 71A, and an inlet 71B-1 is provided above in the vertical direction Z to receive glue residues such as droplets of glue sprayed from the nozzle 33 into the interior of the casing 71B. Further, the casing 71B extends in the width direction Y, and the discharge port 71B-2 for the glue residue provided in the casing 71B is in the region R outside the conveying path 11 and is disposed above the collection box 48. A release layer where the glue residue is easily peeled off is formed on at least a part of the conveying surface of the spiral screw blade of the screw blade 71A that conveys the glue residue. Further, a release layer is formed on at least a part of the inner surface of the casing 71B, and as an example, a fluororesin can be mentioned, and it is formed of PTFE or PFA or the like.

[0053] In this embodiment, the drive unit 72 is a drive motor that rotates the screw blade 71A of the conveying unit 71. By rotating the screw blade 71A, the drive unit 72 conveys the glue residue that has fallen into the interior of the casing 71B and conveys it to the region R outside the conveying path 11 of the conveying device 10 where the sheet C is conveyed when viewed in plan.

[0054] After the control unit 50 causes the glue injection device 30 to execute glue injection a predetermined number of times, the residue recovery device 70 drives the drive unit 72 of the residue recovery device 70 to convey the glue residue by the conveying unit 71. By rotating the screw blade 71A of the conveying unit 71, the glue residue is conveyed in the direction of the discharge port 71B-2 of the casing 71B, falls from the discharge port 71B-2 of the casing 71B into the collection box 48, and is recovered.

[0055] Also in the residue recovery device 70 in the third embodiment, residues such as droplets of glue sprayed from the nozzle 33 of the glue injection device 30 can be automatically recovered without stopping the case manufacturing device 1.

[0056] [Supplementary Note] According to the above disclosure, the following configurations can be understood. (1) The residue recovery devices 40, 60, 70 are arranged above the vertical direction Z of the conveyance path 11 as the first conveyance path extending in the conveyance direction X as the first direction in which the sheet C as the workpiece is conveyed, receive the residue generated from above in the vertical direction Z above the conveyance path 11, and when viewed in plan, a conveyance unit 41 that conveys the residue to the region R outside the conveyance path 11 as the first conveyance path, a drive unit 42 that drives the conveyance unit 41, and a recovery box 48 that recovers the residue conveyed by the second conveyance unit.

[0057] (2) In the residue recovery device 40, the conveyance unit 41 includes an endless belt, and includes a scraper 47 as a removal unit that removes the residue conveyed by the conveyance unit 41 above the recovery box 48.

[0058] (3) The residue recovery device 60 includes a residue receiver 63 that waits for the residue below, and the conveyance unit 61 conveys the residue received by the residue receiver 63 by reciprocating a predetermined distance.

[0059] (4) The residue recovery device 70, the conveyance unit 71 includes a screw blade 71A as a spiral blade and a casing 71B that houses the screw blade 71A as a spiral blade, and conveys the residue by rotating the screw blade 71A as a spiral blade.

[0060] (5) In the residue recovery device 40, in the conveyance unit 41, a release layer is formed on at least a part of the conveyance surface on which the residue of the endless belt is placed and conveyed.

[0061] (6) In the residue recovery device 60, in the residue receiver 63, a release layer is formed on at least a part of the conveyance surface 63A of the residue receiver 63 on which the residue is placed and conveyed.

[0062] (7) The screw blade 71A has a release layer formed on at least a part of the surface of the screw blade 71A as a spiral blade for conveying paste residues, and a release layer is formed on at least a part of the inner surface of the casing 71B.

[0063] (8) The residue recovery device 40 includes a drive-side pulley 43 that transmits the rotational driving force of the electric motor 42 to an endless belt, a driven-side pulley 44 that supports the endless belt together with the drive-side pulley 43, a detected object 45 attached to the driven-side pulley 44, and a detection sensor 46 that detects the detected object 45 rotating together with the driven-side pulley 44.

[0064] (9) The case manufacturing device 1 is a case manufacturing device 1 in which the workpiece is a sheet C, and the sheet C is formed into a box-shaped case by applying paste and bending. The case manufacturing device 1 includes a paste injection device 30 that injects paste from a nozzle 33 into a predetermined region of the sheet C conveyed in the conveyance direction X as the first direction of the conveyance path 11 as the first conveyance path, and the residue recovery devices 40, 60, 70 that are arranged below the paste injection device 30 in the vertical direction Z and protrude downstream in the conveyance direction X as the first direction in which the sheet C is conveyed from the nozzle 33 of the paste injection device 30.

[0065] (10) The case manufacturing device 1 includes a control unit 50. When the paste injection device 30 executes injection of paste a predetermined number of times, the control unit 50 drives the drive units 42, 62, 72 of the residue recovery devices 40, 60, 70 for a predetermined time.

[0066] (11) The case manufacturing device 1 includes a residue detection unit 49 and a control unit 50. When the residue detection unit 49 detects that the deposited paste residue has reached a predetermined position, the control unit 50 drives the drive units 42, 62, 72 of the residue recovery devices 40, 60, 70 for a predetermined time.

[0067] When the control unit 50 is provided and the sheet C is being conveyed below the residue collection devices 40, 60, and 70, the driving units 42, 62, and 72 of the residue collection devices 40, 60, and 70 are stopped. When the sheet C is being conveyed at a position away from below the residue collection devices 40, 60, and 70, the driving units 42, 62, and 72 of the residue collection devices 40, 60, and 70 are driven.

[0068] In addition to the above, it is possible to select and choose the configurations listed in the above embodiments, or to appropriately modify them to other configurations.

Explanation of Reference Numerals

[0069] 1 Case manufacturing device 10 Conveying device 11 Conveying path 20 Bending guide 21 Inclined portion 22 Parallel portion 30 Adhesive injection device 31 Adhesive storage portion 32 Electromagnetic valve 33 Nozzle 33A Injection port 40 Residue collection device 41 Conveyor belt 42 Electric motor 43 Driving side pulley 44 Driven side pulley 45 Detection object 46 Detection sensor 47 Scraper 48 Collection box 48A Light projector 48B Light receiver 49 Residue detection unit 49A Light projector 49B Light receiver 50 Control unit 60 Residue collection device 61 Conveying unit 61A Bottom surface 61B Pushing surface 62 Driving unit 63 Residue receiver 63A Conveying surface 63B Y - side end face 70 Residue Recovery Device 71 Conveyor Section 71A Screw Blade 71B Casing 71B-1 Inlet 71B-2 Outlet 72 Driving Section C Sheet R Outer Region

Claims

1. A conveying unit that is disposed above the first conveying path extending in the first direction along which the workpiece is conveyed, receives residues generated from above in the vertical direction above the first conveying path, and conveys the residues to a region outside the first conveying path when viewed in plan view; A driving unit that drives the conveying unit; A residue recovery device comprising a storage unit that recovers the residues conveyed by the conveying unit.

2. The conveying unit includes an endless belt; The conveying unit includes a removal unit that removes the residues conveyed by the conveying unit from the conveying unit above the storage unit. The residue recovery device according to Claim 1.

3. A residue receiver that awaits the residues below; The conveying unit conveys the residues received by the residue receiver by reciprocating the residues over a predetermined distance. The residue recovery device according to Claim 1.

4. The conveying unit includes spiral blades; and a casing that houses the spiral blades, and conveys the residues by rotating the spiral blades. The residue recovery device according to Claim 1.

5. A release layer is formed on at least a part of the conveying surface of the endless belt on which the residues are placed and conveyed by the conveying unit. The residue recovery device according to Claim 2.

6. A release layer is formed on at least a part of the conveying surface of the residue receiver on which the residues are placed and conveyed. The residue recovery device according to Claim 3.

7. A release layer is formed on at least a part of the surface of the spiral blades that conveys the residues, and a release layer is formed on at least a part of the inner surface of the casing. The residue recovery device according to Claim 4.

8. A driving-side pulley that transmits the rotational driving force of the driving unit to the endless belt; A driven-side pulley that supports the endless belt together with the driving-side pulley; A detected object attached to the driven-side pulley; A detection sensor that detects the detected object rotating together with the driven-side pulley. The residue recovery device according to Claim 2.

9. The workpiece is a sheet, a case manufacturing device 1 that forms the sheet into a box-shaped case by applying adhesive and folding, An adhesive injection device that injects adhesive from a nozzle into a predetermined region of the sheet conveyed in the first direction of the first conveying path. A case manufacturing apparatus, comprising: a residue recovery device according to any one of claims 1 to 4, disposed below the paste injection device in the vertical direction and protruding downstream of the first direction in which the sheet is conveyed from the nozzle of the paste injection device.

10. Comprising a control unit, The control unit, When the paste injection device has executed injection of paste a predetermined number of times, drives the drive unit of the residue recovery device for a predetermined time. The case manufacturing apparatus according to claim 9.

11. A residue detection unit, A control unit, and The control unit, When the residue detection unit detects that the deposited paste residue has reached a predetermined position, drives the drive unit of the residue recovery device for a predetermined time. The case manufacturing apparatus according to claim 9.

12. Comprising a control unit, The control unit, When the sheet is being conveyed below the residue recovery device, stops the drive of the drive unit of the residue recovery device, When the sheet is being conveyed at a position away from below the residue recovery device, drives the drive unit of the residue recovery device. The case manufacturing apparatus according to claim 9.

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