Residue recovery equipment and case manufacturing equipment

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 cardboard sheet used 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 conveyance path, is displaced integrally with an injection device that sprays glue, and receives the glue adhering to the nozzle from below. In order for an operator to collect the glue accumulated in the glue receiver disposed on the conveyance 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 sprayed 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] Therefore, the present disclosure aims to provide a residue recovery device that can recover residue adhering to a nozzle that sprays adhesive without stopping the manufacturing equipment of the product to which the adhesive is sprayed. [Means for solving the problem]

[0006] The residue recovery device according to this disclosure is positioned vertically above a first transport path extending in a first direction in which a workpiece is transported, and includes a transport unit that receives residue generated from vertically above above the first transport path and transports the residue to an area outside the first transport path when viewed from above, a drive unit that drives the transport unit, and a storage unit that collects the residue transported by the transport unit. [Effects of the Invention]

[0007] According to this disclosure, it is possible to provide a residue recovery device that can recover residue adhering to a nozzle for spraying adhesive without stopping the manufacturing equipment for the product to which the adhesive is sprayed. [Brief explanation of the drawing]

[0008] [Figure 1] This is a side view showing a case manufacturing apparatus according to the first embodiment of this disclosure. [Figure 2] This is a front view showing a case manufacturing apparatus according to the first embodiment of this disclosure. [Figure 3] This is a perspective view showing a residue recovery device according to the first embodiment of this disclosure. [Figure 4] This is a perspective view showing a residue recovery device according to a second embodiment of the present disclosure. [Figure 5] This is a perspective view showing a residue recovery device according to a third embodiment of this disclosure. [Modes for carrying out the invention]

[0009] The embodiments of this disclosure will be described below using an apparatus for manufacturing box-shaped cases by folding corrugated cardboard sheets as an example. In the following description, three embodiments are included, the first embodiment, the second embodiment, and the third embodiment, depending on the means of discharging the residue. In the first embodiment, the residue is placed on a linearly moving conveyor and discharged; in the second embodiment, the residue is pushed out and discharged by a pusher that is capable of moving back and forth; and in the third embodiment, the residue is placed on a rotating screw and discharged.

[0010] In this embodiment, the residue is a solid that can be called adhesive residue, which is an adhesive that functions as glue, specifically a hot melt adhesive, and is a portion of the adhesive that is sprayed from the nozzle and adheres to the nozzle. In this embodiment, the discharge of residue refers to the transport of the adhesive residue from the position where it was received from the free-falling adhesive residue to a non-transport position where the corrugated cardboard sheet used in the case manufacturing process deviates from the transport path 11. The following describes the first embodiment, the second embodiment, and the third embodiment in that order.

[0011] [First Embodiment] (Overview of the case manufacturing equipment) The first embodiment of this disclosure will be described below with reference to the attached drawings. The case manufacturing apparatus 1 is a device that forms a box-shaped case from a sheet C by applying adhesive and folding it. The sheet C is made of, for example, corrugated cardboard. As shown in Figure 1, the case manufacturing apparatus 1 includes a conveying device 10 that carries a sheet C in the conveying direction X, a bending guide 20 that folds the sheet C carried by the conveying device 10, an adhesive spraying device 30 that sprays adhesive at the adhesive application position on the sheet C carried by the conveying device 10, and a residue collection device 40 that discharges adhesive residue that falls from the spraying nozzle of the adhesive spraying device 30. The case manufacturing apparatus 1 also includes a control unit 50 that controls the operation of the conveying device 10, the adhesive spraying device 30, and the residue collection device 40. In this embodiment, as shown in Figure 1 and other figures, the transport direction is defined as X, the width direction as Y, and the vertical direction as Z. The width direction Y is parallel to the horizontal direction and perpendicular to the transport direction X.

[0012] (Configuration and operation of the conveying device 10) The conveying device 10 is, for example, a chain conveyor that places a sheet C, which is the object to be conveyed, on a flat plate attached to a chain and conveys it along a conveying path 11. The chain conveyor as conveying device 10 comprises a sprocket driven by a drive motor, a chain on which a flat plate for carrying the object to be conveyed is attached and is hung on the sprocket, and guides arranged on both sides in the width direction of the chain. The chain conveyor as conveying device 10 controls the drive motor with a control unit 50, which will be described later, to convey the sheet C supplied in a predetermined amount from a supply unit (not shown) at a predetermined speed or to stop at a predetermined position.

[0013] (Configuration and operation of the folding guide 20) The bending guide 20 folds a corresponding area of ​​the sheet C as it is being transported by the conveying device 10. In this embodiment, as the sheet C is transported by the conveying device 10, the upper surface panel C2 on the upper side in the vertical Z direction of the sheet C comes into contact with the bending guide 20 and is folded to a predetermined position. The bending guide 20 is continuous from an inclined section 21 that forms a predetermined angle with respect to the conveying path 11 of the conveying device 10 to a parallel section 22 that is parallel to the conveying path 11. The upper surface panel C2 is folded as it comes into contact with the parallel section 22 from the inclined section 21. As shown in Figure 2, as an example, three folding guides 20 are arranged at equal intervals in the width direction Y.

[0014] (Configuration and operation of the adhesive spraying 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 up upward continuously from the surface C1 of the sheet C. When the paste injection device 30 injects the paste, since the upper surface 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 surface 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 above the conveyance path 11 along which the sheet C is conveyed and is disposed above the parallel portion 22 of the bending guide 20. Also, in the conveyance direction X, the paste injection device 30 is disposed 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. Also, the nozzle 33 extending in the injection direction of the paste injected from the paste injection device 30 is disposed 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 adhesive spraying devices 30 are arranged side by side in the width direction Y, and each adhesive spraying device 30 is equipped with three nozzles 33, but this is not limited to this configuration. The number of adhesive spraying devices 30 may be changed to correspond to the size of the sheet C in the width direction Y, or the number of nozzles 33 provided in the adhesive spraying devices 30 and the spacing of the nozzles 33 in the width direction Y may be changed.

[0018] (Configuration and operation of the residue recovery device 40) The residue recovery device 40 is a device that receives adhesive residue dripping from nozzles 33 located on the transport path 11, transports the adhesive residue from the receiving position to an area R outside the transport path 11, and then recovers it. The residue recovery device 40 can recover adhesive residue that has adhered to the nozzles 33 without being sprayed from them, without stopping the operation of the transport device 10 and the adhesive spraying device 30 of the case manufacturing device 1.

[0019] In this embodiment, the residue recovery device 40 is a residue recovery device that transports the residue by an endless belt and recovers the residue. The residue recovery device 40 comprises an endless conveyor belt 41, an electric motor 42 which is the driving source for the conveyor belt 41, a drive-side pulley 43 which transmits the rotational driving force of the electric motor 42 to the conveyor belt 41, and a driven-side pulley 44 which supports the conveyor belt 41 together with the drive-side pulley 43. Furthermore, the residue recovery device 40 includes a detection object 45 attached to a driven pulley 44, and a detection sensor 46 that detects the detection object 45 which rotates together with the driven pulley 44. Furthermore, the residue recovery device 40 includes a scraper 47 that scrapes off and removes the glue residue being transported on the conveying surface of the conveyor belt 41, a recovery box 48 which serves as a storage unit for recovering the glue residue scraped off by the scraper 47 from the conveyor belt 41, and a residue detection unit 49 that detects the glue residue accumulated on the conveying surface of the conveyor belt 41.

[0020] The conveyor belt 41 receives the adhesive residue dripped from the nozzle 33 located on the transport path 11 and transports the residue at a predetermined speed. The conveyor belt 41 is positioned so as to protrude downstream of the nozzle 33 in the transport direction X, which is the first direction in which the sheet C is transported. The conveyor belt 41 is also positioned below the path through which the adhesive sprayed from the nozzle 33 passes. The conveyor belt 41 has a release layer formed on at least a portion of the conveying surface on which the adhesive residue is carried, which makes it easier for the adhesive residue to peel off. One example of the release layer is a fluororesin, which is formed from PTFE or PFA, etc.

[0021] The object to be detected 45 consists of multiple teeth that protrude radially outward from the driven pulley 44. The detection sensor 46 detects whether the conveyor belt 41 is operating by repeatedly checking whether or not the multiple teeth of the object to be detected 45 are being detected, thereby determining whether or not the driven pulley 44 is rotating.

[0022] The scraper 47, acting as a removal unit, is brought into contact with the conveying surface of the conveyor belt 41, which is stretched over the drive-side pulley 43, and removes the adhesive residue adhering to the conveying surface of the conveyor belt 41 by scraping it off the conveyor belt 41. By equipping the residue recovery device 40 with the scraper 47, adhesive residue can be removed from the conveyor belt 41. The collection box 48 receives and collects the adhesive residue scraped off by the scraper 47. The scraped adhesive residue passes over the surface of the scraper 47 and then falls freely into the collection box 48. For this reason, the collection box 48 is located below the scraper 47 in the area R outside the transport path 11 of the transport device 10 when viewed from above. Furthermore, the collection box 48 includes a light emitter 48A and a light receiver 48B, which serve as a fullness detection unit for detecting when the box is full of adhesive residue. The light emitter 48A and the light receiver 48B are through-type photoelectric sensors installed facing each other. The light emitter 48A and the light receiver 48B detect the adhesive residue that has been collected up to a predetermined height in the collection box 48. Detecting adhesive residue when the light emitter 48A and the light receiver 48B reach a predetermined position means that the residue accumulated between the light emitter 48A and the light receiver 48B remains, the amount of light received by the light receiver 48B falls below the amount of light emitted by the light emitter 48A, and this decrease in light received continues for a predetermined period of time.

[0023] The residue detection unit 49 is received by an endless belt acting as a conveyor belt 41 and detects the glue residue when it has accumulated 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 glue residue by the residue detection unit 49 may be by detecting the height of the residue accumulated in the vertical direction Z, or by detecting the glue residue that has spread in the conveying direction X as the glue residue has accumulated. When the residue detection unit 49 detects glue residue when it has accumulated to a predetermined position, it means that the residue accumulated between the light emitter 49A and the light receiver 49B continues to stay there, the amount of light received by the light receiver 49B becomes lower than the amount of light emitted by the light emitter 49A, and this decrease in the amount of light received continues for a predetermined time.

[0024] Therefore, it is preferable that the residue recovery device 40 is positioned above the vertical Z of the conveying path 11, which is a first conveying path extending in the conveying direction X, which is the first direction in which the sheet C is conveyed, and that the conveying device 40 includes a conveyor belt 41 that receives the adhesive residue generated from above the vertical Z above the conveying path 11 and, when viewed from above, conveys the adhesive residue to an area R outside the conveying path 11, an electric motor 42 that drives the conveyor belt 41 without stopping the case manufacturing device 1, which is a processing device for processing the sheet C, and a recovery box 48 as a storage unit for collecting the adhesive residue conveyed by the conveyor belt 41. This allows the residue adhering to the nozzle 33 of the adhesive spraying device 30 to be automatically collected without stopping the case manufacturing device 1, which forms the sheet C to be sprayed with adhesive into a box-shaped case.

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

[0026] The control unit 50 keeps the electric motor 42 of the residue recovery device 40 running while the case manufacturing device 1 is in operation.

[0027] Alternatively, the control unit 50 may, after causing the adhesive spraying device 30 to spray adhesive a predetermined number of times, drive the electric motor 42 of the residue collection device 40 for a predetermined time.

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

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

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

[0031] Furthermore, if the control unit 50 detects that adhesive residue has been collected up to a predetermined height in the collection box 48 using the light emitter 48A and light receiver 48B, it can notify the worker to replace the collection box 48 by displaying the information on the monitor of the case manufacturing apparatus 1 (not shown) and by sounding an alarm through the speaker. This prevents adhesive residue from overflowing from the collection box 48 and also reduces the workload on the workers.

[0032] [Effects of the first embodiment] The residue recovery device 40 according to the first embodiment described above provides the following effects. The residue recovery device 40 is equipped with a conveyor belt 41 that receives the adhesive residue generated from above in the vertical direction Z above the transport path 11 and transports the adhesive residue to an area R outside the transport path 11 when viewed from above. This allows the adhesive residue adhering to the nozzle 33 that sprays the adhesive to be recovered without stopping the case manufacturing apparatus 1, which is the manufacturing apparatus for the sheet C to which the adhesive is sprayed.

[0033] Furthermore, the residue recovery device 40 includes a scraper 47 that comes into contact with the conveying surface of the conveyor belt 41, which is stretched over the drive-side pulley 43, to remove adhesive residue adhering to the conveying surface of the conveyor belt 41. This allows the adhesive residue to be scraped off the conveyor belt 41.

[0034] The residue recovery device 40 includes a detection object 45 attached to a driven pulley 44, and a detection sensor 46 that detects the detection object 45 which rotates together with the driven pulley 44. The detection object 45 is composed of a plurality of teeth that protrude radially outward from the driven pulley 44. As a result, the detection sensor 46 can detect whether the conveyor belt 41 is operating by repeatedly checking whether or not the driven pulley 44 is rotating, based on whether or not multiple teeth of the object to be detected 45 are being detected.

[0035] The residue recovery device 40 includes a control unit 50 that controls each component of the case manufacturing device 1, which forms a box-shaped case by applying adhesive to the sheet C, folding it, and pressing it. The control unit 50 keeps the electric motor 42 of the residue recovery device 40 running while the case manufacturing device 1 is in operation. This allows for the rapid collection of adhesive residue.

[0036] The control unit 50 of the residue recovery device 40 causes the adhesive spraying device 30 to spray adhesive a predetermined number of times, and then drives the electric motor 42 of the residue recovery device 40 for a predetermined time. This reduces the running costs of the residue recovery device 40 and allows for the regular collection of adhesive residue.

[0037] The control unit 50 of the residue recovery device 40 may drive the electric motor 42 of the residue recovery device 40 for a predetermined time when the residue detection unit 49 detects that the accumulated glue residue has reached a predetermined position in the transport direction X. This allows the adhesive residue to be automatically collected without falling downstream in the conveying direction X from the endless belt.

[0038] The control unit 50 of the residue collection device 40 may drive the electric motor 42 of the residue collection device 40 for a predetermined time when the residue detection unit 49 detects that the accumulated glue residue has reached a predetermined height in the vertical direction Z. This allows the adhesive residue to be automatically collected without the nozzle 33A being blocked by accumulated adhesive residue.

[0039] The control unit 50 of the residue recovery device 40 may stop the electric motor 42 of the residue recovery device 40 when the sheet C is being transported below the residue recovery device 40 by the transport device 10, and may drive the electric motor 42 of the residue recovery device 40 when the sheet C is being transported at a position away from below the residue recovery device 40. As a result, some of the adhesive residue adhering to the conveyor belt 41 passes through without being scraped off by the scraper 47, and even if the adhesive residue adhering to the conveyor belt 41 is detached due to vibrations of the conveyor belt 41, it can be prevented from falling onto the sheet C.

[0040] The detection sensor 46 detects whether the conveyor belt 41 is operating by repeatedly checking whether or not the driven pulley 44 is rotating, by checking whether or not multiple teeth of the object to be detected 45 are being detected, but is not limited to this. For example, when detecting the current value of the electric motor 42, if the load on the electric motor 42 continuously decreases and the current value continuously decreases, it may be possible to detect whether or not the conveyor belt 41 is operating. Alternatively, a belt tension detection sensor may be pressed against the conveyor belt 41, and when the belt tension detected by the belt tension detection sensor drops sharply, it may be detected whether or not the conveyor belt 41 is operating. Furthermore, as a belt detection unit that checks the presence or absence of the conveyor belt 41 from above, a reflective photoelectric sensor may be used to detect whether or not the conveyor belt 41 is operating.

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

[0042] The residue collection device 60 is a device that, when adhesive is sprayed by the adhesive spraying device 30, waits below for adhesive residue such as droplets of adhesive sprayed from the nozzle 33, and transports the accumulated adhesive residue by a transport unit that reciprocates over a predetermined distance, and transports it to an area R outside the transport path 11 of the transport device 10, where the sheet C is transported when viewed from above.

[0043] The residue collection device 60 includes a conveying unit 61 that pushes the adhesive residue in the width direction Y and conveys it to an area R outside the conveying path 11 of the conveying device 10, a drive unit 62 that causes the conveying unit 61 to reciprocate over a predetermined distance, and a residue receiver 63 that waits below for adhesive residue such as droplets of adhesive sprayed from a nozzle.

[0044] In this embodiment, the conveying unit 61 is rectangular in shape and comprises a lower surface 61A and an extrusion surface 61B. The lower surface 61A rests on the upper conveying surface 63A of the residue receiver 63 in the vertical Z direction and slides along the conveying surface 63A of the residue receiver 63. In other words, the conveying unit 61 also functions as a scraper 47 that scrapes and removes the glue residue received by the residue receiver 63 from the conveying surface 63A of the residue receiver 63. In the width direction Y, the stopping position of the extrusion surface 61B when the conveying unit 61 is fully extended is beyond the Y-side end surface 63B. That is, the conveying unit 61 moves to a position that covers a part of the upper part of the collection box 48.

[0045] In this embodiment, the drive unit 62 is a so-called drive actuator, such as an air cylinder, which causes the conveying unit 61 to reciprocate over a predetermined distance. By causing the conveying unit 61 to reciprocate over a predetermined distance, the drive unit 62 conveys the adhesive residue accumulated in the residue receiver 63 and, when viewed from above, conveys it to the area R outside the conveying path 11 of the conveying device 10 where the sheet C is conveyed.

[0046] In this embodiment, the residue receiver 63 is plate-shaped and comprises a conveying surface 63A and a Y-side end surface 63B. The residue receiver 63 receives adhesive residue on the conveying surface 63A, and the adhesive residue is scraped off and removed by the conveying part 61 which slides along the conveying surface 63A. The residue receiver 63 has a release layer formed on the surface of the conveying surface 63A on which the adhesive residue is carried, which makes it easier for the adhesive residue to peel off. The release layer is made of fluororesin, for example, PTFE or PFA.

[0047] The residue recovery device 60, after the control unit 50 has caused the adhesive spraying device 30 to spray adhesive a predetermined number of times, drives the drive unit 62 of the residue recovery device 60 to transport the adhesive residue by the transport unit 61. When the extrusion surface 61B of the transport unit 61 moves to a position beyond the Y-side end face 63B, the scraped adhesive residue falls into the collection box 48 located in the area R outside the transport path 11 and is collected.

[0048] [Effects of the second embodiment] In the second embodiment, the residue recovery device 60 can also automatically recover residues such as droplets of glue sprayed from the nozzle 33 of the glue spraying device 30 without stopping the case manufacturing device 1.

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

[0050] The residue recovery device 70 is a device that waits below for adhesive residue such as droplets of adhesive sprayed from the nozzle 33 when adhesive is sprayed by the adhesive spraying device 30, and transports the adhesive residue by rotating the screw blades of the screw conveyor, which serves as the transport section 71, to the area R outside the transport path 11 of the transport device 10, where the sheet C is transported when viewed from above.

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

[0052] In this embodiment, the conveying section 71 is a screw conveyor and comprises a screw blade 71A and a casing 71B. The conveying section 71 is located below the nozzle 33 of the adhesive spraying device 30. The casing 71B of the conveying section 71 houses the screw blade 71A and has an inlet 71B-1 located above it in the vertical direction Z, receiving adhesive residue such as droplets of adhesive sprayed from the nozzle 33 into the casing 71B. The casing 71B also extends in the width direction Y, and the adhesive residue discharge port 71B-2 provided in the casing 71B is located in the area R outside the conveying path 11 and above the collection box 48. The screw blades 71A have a release layer formed on at least a portion of the conveying surface of the spiral screw blades that transport the adhesive residue, making it easier for the adhesive residue to peel off. The casing 71B also has a release layer formed on at least a portion of its inner surface, and one example of this is a fluororesin, which may be formed from PTFE or PFA.

[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 adhesive residue that has fallen into the casing 71B and, when viewed from above, conveys it to the area R outside the conveying path 11 of the conveying device 10 on which the sheet C is conveyed.

[0054] The residue recovery device 70, after the control unit 50 has caused the adhesive spraying device 30 to spray adhesive a predetermined number of times, drives the drive unit 72 of the residue recovery device 70 to transport the adhesive residue by the transport unit 71. By rotating the screw blades 71A of the transport unit 71, the adhesive residue is transported toward 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 collected.

[0055] In the third embodiment, the residue recovery device 70 can also automatically recover residues such as droplets of glue sprayed from the nozzle 33 of the glue spraying device 30 without stopping the case manufacturing device 1.

[0056] [Note] Based on the above disclosures, the following configuration can be understood. (1) The residue recovery devices 40, 60, and 70 are positioned above the vertical Z of the conveying path 11, which is a first conveying path that extends in the conveying direction X, which is the first direction in which the sheet C as a workpiece is conveyed. They include a conveying unit 41 that receives the residue generated from above the vertical Z above the conveying path 11 and, when viewed from above, conveys the residue to an area R outside the conveying path 11, which is the first conveying path; a drive unit 42 that drives the conveying unit 41; and a recovery box 48 that collects the residue conveyed by the second conveying unit.

[0057] (2) The residue recovery device 40 includes a conveying section 41 equipped with an endless belt, and a scraper 47 as a removal section that removes the residue conveyed by the conveying section 41 from the conveying section 41 above the recovery box 48.

[0058] (3) The residue collection device 60 is equipped with a residue receiver 63 that waits for the residue below, and the conveying unit 61 conveys the residue received by the residue receiver 63 by reciprocating over a predetermined distance.

[0059] (4) The residue recovery device 70 includes a conveying section 71 which comprises a screw blade 71A as a helical blade and a casing 71B that houses the screw blade 71A as a helical blade, and the residue is conveyed by rotating the screw blade 71A as a helical blade.

[0060] (5) The residue recovery device 40 has a conveying section 41 in which a release layer is formed on at least a part of the conveying surface on which the residue of the endless belt is carried.

[0061] (6) The residue recovery device 60 has a residue receiver 63 on which a release layer is formed on at least a portion of the conveying surface 63A of the residue receiver 63 on which the residue is placed and conveyed.

[0062] (7) The screw blades 71A have a release layer formed on at least a portion of the surface of the screw blades 71A, which are helical blades that transport the glue residue, and the inner surface of the casing 71B has a release layer formed on at least a portion of the surface.

[0063] (8) The residue recovery device 40 includes a drive-side pulley 43 that transmits the rotational driving force of an 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 that rotates together with the driven-side pulley 44.

[0064] (9) The case manufacturing apparatus 1 is a case manufacturing apparatus 1 in which the workpiece is a sheet C and the sheet C is formed into a box-shaped case by applying glue and folding, and comprises a glue spraying device 30 that sprays glue from a nozzle 33 onto a predetermined area of ​​the sheet C that is conveyed in the conveying direction X as the first direction of the conveying path 11 as the first conveying path, and residue recovery devices 40, 60, 70 that are arranged below the glue spraying device 30 in the vertical direction Z and protrude downstream of the nozzle 33 of the glue spraying device 30 in the conveying direction X as the first direction in which the sheet C is conveyed.

[0065] (10) The case manufacturing apparatus 1 includes a control unit 50, which drives the drive units 42, 62, and 72 of the residue recovery apparatus 40, 60, and 70 for a predetermined time when the adhesive spraying apparatus 30 has sprayed adhesive a predetermined number of times.

[0066] (11) The system comprises a residue detection unit 49 and a control unit 50, and when the residue detection unit 49 detects that the accumulated glue 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] (12) The control unit 50 is provided, and when the sheet C is being transported below the residue recovery devices 40, 60, 70, the drive units 42, 62, 72 of the residue recovery devices 40, 60, 70 are stopped, and when the sheet C is being transported at a position away from below the residue recovery devices 40, 60, 70, the drive units 42, 62, 72 of the residue recovery devices 40, 60, 70 are driven.

[0068] In addition to the above, it is possible to select or replace the configurations listed in the above embodiments, or to change them to other configurations as appropriate. [Explanation of Symbols]

[0069] 1 Case manufacturing equipment 10 Conveying device 11 Conveyor path 20 Folding Guide 21 Slope 22 Parallel section 30 Glue injection device 31 Glue storage section 32 Solenoid valve 33 nozzles 33A injection port 40. Residue recovery device 41 Conveyor belt 42 Electric motors 43 Drive pulley 44 Driven pulley 45. Detected object 46 detection sensors 47 Scraper 48 collection boxes 48A Floodlight 48B Receiver 49 Residue detection unit 49A Floodlight 49B Receiver 50 Control Unit 60 Residue recovery device 61 Conveying section 61A Bottom 61B Extruded surface 62 Drive unit 63. Residue collection 63A Conveyor surface 63B Y side end face 70. Residue recovery device 71 Conveying section 71A Screw blades 71B Casing 71B-1 Entrance 71B-2 Outlet 72 Drive Unit C Sheet R Outer region

Claims

1. A conveying unit is positioned vertically above a first conveying path extending in a first direction in which the workpiece is conveyed, and which receives residue generated vertically from above above the first conveying path and, when viewed from above, conveys the residue to an area outside the first conveying path. A drive unit for driving the transport unit, A residue recovery apparatus comprising a storage unit for recovering the residue conveyed by the conveying unit.

2. The conveying section is equipped with an endless belt, The system includes a removal unit that removes the residue conveyed by the conveying unit from the conveying unit above the storage unit. The residue recovery apparatus according to claim 1.

3. The system includes a residue receiver that awaits the aforementioned residue below, The conveying unit conveys the residue received by the residue receiver by reciprocating over a predetermined distance. The residue recovery apparatus according to claim 1.

4. The aforementioned transport unit is Spiral wings, The casing comprises the aforementioned spiral blades, The residue is conveyed by rotating the spiral blades. The residue recovery apparatus according to claim 1.

5. The conveying section has a release layer formed on at least a portion of the conveying surface on which the residue of the endless belt is carried. The residue recovery apparatus according to claim 2.

6. The residue receiver has a release layer formed on at least a portion of its conveying surface on which the residue is placed and conveyed. The residue recovery apparatus according to claim 3.

7. The aforementioned spiral blades have a release layer formed on at least a portion of the surface of the spiral blades that transport the residue. A release layer is formed on at least a portion of the inner surface of the casing. The residue recovery apparatus according to claim 4.

8. A drive-side pulley that transmits the rotational driving force of the drive unit to the endless belt, A driven pulley supports the endless belt together with the drive pulley, The object to be detected is attached to the driven pulley, The system includes a detection sensor that detects an object to be detected that rotates together with the driven pulley, The residue recovery apparatus according to claim 2.

9. The aforementioned workpiece is a sheet, A case manufacturing apparatus 1 for forming the sheet into a box-shaped case by applying adhesive and folding, A glue spraying device that sprays glue from a nozzle onto a predetermined area of ​​the sheet being 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, which is positioned vertically below the adhesive spraying device and protruding downstream of the nozzle of the adhesive spraying device in the first direction from which the sheet is conveyed.

10. Equipped with a control unit, The control unit, When the adhesive spraying device has performed a predetermined number of adhesive sprays, the drive unit of the residue collection device is driven for a predetermined time. The case manufacturing apparatus according to claim 9.

11. Residue detection unit, It comprises a control unit and, The control unit, When the residue detection unit detects that the accumulated glue residue has reached a predetermined position, the drive unit of the residue recovery device is driven for a predetermined time. The case manufacturing apparatus according to claim 9.

12. Equipped with a control unit, The control unit, If a sheet is being transported below the residue collection device, the drive unit of the residue collection device is stopped. If the sheet is being transported at a position away from below the residue collection device, the drive unit of the residue collection device is driven. The case manufacturing apparatus according to claim 9.

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