Detection device

Abstract

The present invention provides a detection device capable of detecting a case where two caps are arranged at one container (so-called "two-in-one cap"). The detection device (10, 10A) of the present invention is provided with a proximity sensor (3) and two sensors of a sensor (4: for example, a transmission-type sensor) provided with a signal transmitter (4A) and a signal receiver (4B) in the same path along the path where the container (1) moves in a production line (100) of a product that seals the opening portion (1A) of the container (1) with the cap (2), and the area detected by the sensors (3, 4) is an area where the cap (2) does not exist in a normal state (a state where the two-in-one cap is not generated) and the subsequent cap (2-1) exists in a case where two caps (2) are continuously installed at one container (1).

Description

TECHNICAL FIELD

[0001] The present application relates to a detection device that detects an undesirable condition that occurs when a cap seals a mouth portion of a container. BACKGROUND

[0002] An opening portion (mouth portion) of a container that houses various beverages is sealed with a cap (for example, an aluminum cap) of a material different from that of the container in a manufacturing process to prevent leakage of the beverage as a content or intrusion of foreign matter into the container or the beverage.

[0003] Further, in a beverage container, the mouth portion of one container is sealed with one cap, but in a process of arranging a cap (hat) at the mouth portion of the container, a case where two caps are arranged at one container (so-called "double cap" state, refer to Figure 7 、 Figure 8 ) can occur.

[0004] Since the cap functions as a seal member that prevents the intrusion of foreign matter, if the double cap occurs and circulates on the market, it can be assumed that the manufacturing process of the beverage is abnormal, and it can become a major cause of bad reputation in terms of hygiene. Therefore, in the case of the double cap, it is necessary to immediately detect it and prevent the container in the double cap state from circulating on the market.

[0005] However, a technique for effectively detecting the double cap shown in Figure 7 、 Figure 8 has not been proposed.

[0006] Here, although it can be considered to arrange a camera at a production line and detect the double cap using an image obtained by photographing the container (a container filled with a beverage and capped) being transported in the manufacturing process with the camera, there is no space to arrange the camera in the production line.

[0007] Further, the camera capable of photographing the double cap is expensive, and it becomes a major cause of the increase in the manufacturing cost of the beverage product.

[0008] As another prior art, although a technique for detecting poor adhesion of a case (refer to Patent Document 1) has been proposed, the double cap of the above-described container cannot be detected according to the prior art.

[0009] Patent Document 1: Japanese Patent No. 5387171 SUMMARY

[0010] The present application has been made in view of the problems of the above-described prior art, and an object thereof is to provide a detection device that immediately and practically detects a case where two caps are arranged at one container (so-called "double cap").

[0011] The detection device (10) of the present application is characterized in that, on a production line (100: manufacturing device) of a product in which the opening portion (1A: mouth portion) of the container (1) is sealed by the lid (2), a proximity sensor (3) is provided along the path in which the container (1) moves, and the area detected by the proximity sensor (3) is an area in which, in a normal state (a state in which the double lid is not generated), no lid (2) is present, two lids (2) are continuously installed at one container (1), and the subsequent lid (2-1) is in close contact with the surface of the container (will generate a so-called "close contact type double lid" as shown in Figure 7 ), and the detection of the container (1) in which two lids (2) are continuously installed is performed by the proximity sensor (3).

[0012] Here, the aforementioned proximity sensor (3) is preferably provided at an area (for example, a press bending device 20) in which the container (1) rotates on the path in which the container (1) is carried.

[0013] Further, the aforementioned proximity sensor (3) is preferably provided in a plurality of (preferably six) in a range substantially the same as the outer peripheral dimension of the container (1) along the path in which the container (1) is carried.

[0014] In this specification, the term "double lid" refers to a state in which two lids (2) are installed at one container (1).

[0015] Further, in the double lid, there are two types, a case in which the subsequent lid (2-1) is in close contact with the outer periphery of the container (a state of the close contact type double lid as shown in Figure 7 ), and a case in which the subsequent lid (2-1) is raised from the outer periphery of the container (a state of the raised type double lid as shown in Figure 8 ).

[0016] Further, the detection device (10A) of the present application is characterized in that, on a production line (100: manufacturing device) of a product in which the opening portion (1A: mouth portion) of the container (1) is sealed by the lid (2), a sensor (4: for example, a penetration type sensor) provided with a signal transmitter (4A: for example, a light projector) and a signal receiver (4B: for example, a light receiver) is provided at the path in which the container (1) moves, and the area detected by the sensor (4) is an area in which, in a normal state (a state in which the double lid is not generated), no lid (2) is present, two lids (2) are continuously installed at one container (1), and the subsequent lid (2-1) is raised from the surface of the container (a state of the raised type double lid as shown in Figure 8 ), and the detection of the container in which two lids are continuously installed (detection of the so-called "raised type double lid") is performed by the sensor.

[0017] Further, the aforementioned sensor (4) is preferably provided in a region where the container (1) is rotated (for example, a curling device 20) or a region after the rotational movement (for example, a region on the downstream side of the curling device 20) on a path along which the container (1) is conveyed.

[0018] Further, the aforementioned sensor (4) is preferably a penetrating sensor (for example, a penetrating fiber sensor).

[0019] Further, the aforementioned sensor (4) is preferably a penetrating sensor (for example, a penetrating fiber sensor).

[0020] Further, the aforementioned sensor (4) is preferably a penetrating sensor (for example, a penetrating fiber sensor).

[0021] Further, the aforementioned sensor (4) is preferably a penetrating sensor (for example, a penetrating fiber sensor).

[0022] Further, the aforementioned sensor (4) is preferably a penetrating sensor (for example, a penetrating fiber sensor).

[0023] Further, the aforementioned sensor (4) is preferably a penetrating sensor (for example, a penetrating fiber sensor).

[0024] Moreover, in the present application, the signal receiver (4B: for example, a light receiver) of the penetration type sensor (4) is arranged on the opposite side of the signal transmitter (4A: for example, a light projector) with respect to the production line on which the container (1) is conveyed, and in the normal state (a state in which the double lid is not generated), (light or ultrasonic waves) are irradiated from the irradiation side device (4A) and received by the signal receiving side sensor (4B), but preferably, it is arranged so that in the case in which two lids (2) are installed at one container (1) and the subsequent lid (2-1) is lifted from the surface of the container (2) (a case in which the lifted double lid is generated), (light or ultrasonic waves) are not received by the receiving side sensor (4B). Figure 8

[0025] However, the irradiation side device (4A) and the receiving side sensor (4B) are arranged on the same side with respect to the production line on which the container (1) is conveyed, and in the normal state in which the double lid is not generated, (light or ultrasonic waves) are not received by the receiving side sensor (4B) from the irradiation side device (4A), but it can also be arranged so that in the case in which two lids (2) are installed at one container (1) and the subsequent lid (2-1) is lifted from the surface of the container (2) (a case in which the lifted double lid is generated), (light or ultrasonic waves) are reflected by the lifted subsequent lid (2-1) and received by the receiving side sensor (4B). Figure 8

[0026] Effect of the Invention

[0027] If the detection device (10) according to the present application having the above-described structure is used, the proximity sensor (3) is arranged along the path on which the container (1) moves, and the proximity sensor (3) takes the surface of the container on which the lid is not present in the normal state in which the double lid is not generated as the inspection region. Moreover, if the subsequent lid (2-1, a lid that is taken away) of the close contact type double lid is in close contact with the surface of the container (as shown in FIG. 6), the subsequent lid (2-1) that is taken away is present in the region. Figure 6 Figure 7 Thus, in the case in which the close contact type double lid as shown in FIG. 6 is generated, the proximity sensor (3) detects that the lid (2) has approached, and detects that the close contact type double lid as shown in FIG. 6 has been generated.

[0028] Therefore, in the case in which the double lid as shown in FIG. 7 is generated, the proximity sensor (3) detects that the lid (2) has approached, and detects that the lifted double lid as shown in FIG. 7 has been generated. Figure 7 Figure 7

[0029] On the other hand, in the case of the double lid in which the subsequent lid (2-1) is in the lifted state (so-called "lifted double lid") as shown in FIG. 8, the subsequent lid (2-1) that is taken away is lifted from the surface of the container, and thus it is not possible to detect this by means of the proximity sensor (3) described above. Figure 8

[0030] ​​​​​​However, in the detection device (10A) of the present application, the sensor (4) having a signal transmitter (4A: for example, a light projector) and a signal receiver (4B: for example, a light receiver) such as a penetration type sensor (a light-transmitting fiber sensor or the like) is provided along the path of the container (1), so that the case where the subsequent cap (2-1) is raised from the outer periphery of the container as shown in Figure 8 Figure 8 Figure 8

[0031] Alternatively, in the case where the subsequent cap (2-1) raised from the outer periphery of the container reflects the light, ultrasonic waves or the like emitted from the signal transmitter (4A) of the sensor (4), and the sensor of the signal receiver (4B) receives the reflected light, ultrasonic waves or the like, the case where the subsequent cap (2-1) raised from the outer periphery of the container as shown in Figure 8 Figure 8

[0032] Thus, if the detection device (10, 10A) of the present application is used, Figure 7 Figure 8

[0033] Here, the sensor (4) having the proximity sensor (3) and / or the signal transmitter (4A) and the signal receiver (4B) is used in the present application, and it is not necessary to provide a camera to take an image of the container behind the cap being conveyed. Therefore, it is not necessary to separately provide a mechanism for installing the camera on the production line.

[0034] Further, the sensor (4) having the proximity sensor (3) and / or the signal transmitter (4A) and the signal receiver (4B) is much less expensive than the camera, so that an increase in cost due to the use of an expensive camera can be prevented. ​​​​​​​BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 FIG. 1 is a diagram showing a production line to which an embodiment of the present application is applied.

[0036] Figure 2 FIG. 2 is a plan view of a curling device of the embodiment.

[0037] Figure 3 FIG. 3 is a sectional view of A-A section of FIG. 2. Figure 2

[0038] Figure 4 FIG. 4 is a diagram showing B-B section, C-C section, and D-D section of the curling plate of the curling device of FIG. 2. Figure 2

[0039] Figure 5 FIG. 5 is a diagram showing a process of producing a double lid.

[0040] Figure 6 FIG. 6 is a diagram showing a lid and its pull tab after being properly capped.

[0041] Figure 7 FIG. 7 is a diagram showing a double lid in close contact with a surface of a container.

[0042] Figure 8 FIG. 8 is a diagram showing a double lid that is raised away from a surface of a container.

[0043] Figure 9 FIG. 9 is a diagram showing a penetration-type sensor, and is an E-direction view of FIG. 8. Figure 2

[0044] FIG. 10 is a plan view of a curling device in which the penetration-type sensor is arranged differently from FIG. 9. Figure 10 Figure 2 FIG. 11 is a flowchart showing the order in which a double lid is detected in the embodiment.

[0045] DETAILED DESCRIPTION Figure 11 Hereinafter, an embodiment of the present application will be described with reference to the accompanying drawings.

[0046] In the embodiment, a production line 100 (manufacturing device) of a detection device 10, 10A (not shown in the drawings) to which an embodiment of the present application is applied has a preparation machine 30, a filling and sealing machine 60, and a curling device 20, and the filling and sealing machine 60 is provided with a cutting head 61. In addition, the production line 100 is provided with an inspection device or a manufacturing device as needed.

[0047] Figure 1 In the embodiment, a production line 100 (manufacturing device) of a detection device 10, 10A (not shown in the drawings) to which an embodiment of the present application is applied has a preparation machine 30, a filling and sealing machine 60, and a curling device 20, and the filling and sealing machine 60 is provided with a cutting head 61. In addition, the production line 100 is provided with an inspection device or a manufacturing device as needed. Figure 1

[0048] ​​​​In addition, although not explicitly shown, in the preparation machine 30, the containers have a function of aligning the opening portions (mouth portions) upward and sequentially feeding them to the next process.

[0049] In the filling and sealing machine 60, after the beverage (not shown) is filled in the container 1 (see Figures 2-10 ), the cap supplied from the cutting head 61 is capped and sealed. In addition, the cutting head 61 has a mechanism for punching a sheet-shaped cap material into a predetermined shape and forming it into a predetermined cap shape, and is capable of continuously supplying the cap to the filling and sealing machine via a conveyance path (not shown).

[0050] Immediately after being sealed, the lower flap portion 2A and the tab portion 2B of the cap 2 are in a state of being apart from and spread apart with respect to the container 1 (see, for example, Figure 6 ). The crimping device 20 is a device for bringing the lower flap portion 2A and the tab portion 2B of the cap 2, which are in a state of being apart from and spread apart with respect to the container 1, into close contact with the outer surface of the opening portion 1A of the container 1.

[0051] In addition, the detection device 10 (two-caps detection device) of the illustrated embodiment is provided to the crimping device 20, and the crimping device 20 including the detection device 10 will be described in detail Figure 2 hereinafter. Furthermore, Figure 1 In the filling and sealing machine 60, after the beverage (not shown) is filled in the container 1 (see

[0052] Figure 2 In the crimping device 20, the moving belt 21 and the crimping plate 22 are respectively arranged on both sides of the path (passage) of the container 1 (sealed container) moving in the arrow X direction. Here, the moving belt 21 can also be replaced with a rope or the like.

[0053] The moving belt 21 is driven by a plurality of drive wheels 21A installed on the crimping device main body side (not shown) and circulates in the arrow Y direction. On the other hand, the crimping plate 22 is fixed to the crimping device main body by a bracket 22A.

[0054] The moving belt 21 moves the container 1 in the direction of the arrow Y( Figure 2 ), and, as shown in Figure 3 , pushes the area of the container 1, which is lower than the portion capped with the cap 2, toward the crimping plate 22 side. Also, the crimping plate 22 pushes the side portion of the cap 2 of the container 1 (including the lower flap portion 2A and the tab portion 2B of the cap 2).

[0055] By the moving belt 21 circulating in the arrow Y( Figure 2 ) direction, the container 1 sandwiched by the moving belt 21 and the crimping plate 22 is moved in the direction of the arrow Y( Figure 2The lower flap portion 2A and the pull tab 2B of the cap 2 abutting against the press bending plate 22 are uniformly adhered to the surface of the container 1 throughout the entire circumference.

[0056] In order to normally adhere the lower flap portion 2A and the pull tab 2B of the cap 2 to the surface of the container 1 without being folded (bent) so as to be overlapped, the cross-sectional shape of the press bending plate 22 (the cross-sectional shape of the portion pressing the container 1) is configured to gradually change from the upstream to the downstream (from the left side to the right side). Figure 2

[0057] The cross section B-B of the press bending plate 22 (refer to Figure 2 ) shown in Figure 4 (A) indicates the cross section C-C shown in Figure 4 (B) and the cross section D-D shown in Figure 4 (C). Figure 4 Figure 4 In (A) to

[0058] (C), in addition to the cross-sectional shape of the press bending plate 22, the portion of the container 1 to which the cap 2 is fitted is also indicated. Figure 4 In the cross section B-B on the upstream side shown in Figure 4 (A), the press bending plate 22 presses only the upper end portion of the cap 2. In contrast to this, Figure 4 In the cross section C-C on the downstream side from the cross section B-B shown in Figure 4 (B), the press bending plate 22 presses the lower flap portion 2A of the cap 2 except for the pull tab portion 2B.

[0059] Next, with reference to Figure 5 , Figure 6 , Figure 7 and Figure 8 , the reason why two caps are arranged at one container to generate so-called "double caps" is described.

[0060] When the cap 2 is fitted to the container 1 to be supplied from the cutting head 61 Figure 1 , the cap 2 in the state of being punched from the aluminum foil is covered (fitted) to the mouth portion 1A of the container 1. As shown in Figure 5 (A), generally, the cap 2 before being fitted to the container 1 is only the cap 2 on the foremost row of the container 1 side which is adsorbed by a vacuum (a vacuum suction mechanism is not shown) and is held in a state of not falling down. The caps 2-1, 2-2 (indicated by dotted lines) which are continuous to the cap 2 on the foremost row are stopped (blocked) from advancing to the container 1 side by the cap 2 on the foremost row, but the continuous caps 2-1, 2-2 are forced to the cap 2 on the foremost row side by gravity. In addition, Figure 5 ​In stage (A), container 1 is filled with a beverage as its contents.

[0061] like Figure 5 As shown in (A), during the stage before the cap is placed on container 1, the cap 2 is held in an inclined position relative to the horizontal direction. Regarding the direction of movement of container 1 (arrow U direction), the leading edge of the opening 1A of container 1 (where the beverage has been filled) Figure 5 (A) The left edge hooks onto the bottommost part 2C of the cover 2, which is tilted relative to the horizontal direction, and moves the cover 2 along against the vacuum holding force. The leading edge of the opening 1A of the moving container 1 hooks onto the bottommost part 2C of the cover 2 and moves along with it. As a result, the cover 2 will leave the vacuum suction mechanism not shown in the figure and cover the opening 1A of the container 1 with the weight of the cover 2.

[0062] When the foremost cover 2 is carried away, the subsequent covers 2-1 move to the position of the foremost cover due to gravity and are held in place by the vacuum action of a vacuum suction mechanism (not shown).

[0063] like Figure 5 As shown in (B), a pull tab 2B is provided at the lid 2. The aforementioned pull tab 2B is used to pull the lid 2 by pinching it with fingers when removing the lid 2 from the container 1. However, when the lid 2 is punched and shaped by the cutting head 61, the pull tab 2B is as follows: Figure 6 As shown in Figure 2, it extends roughly in a horizontal direction.

[0064] Figure 5 In the process of covering container 1 with lid 2 (cap), subsequent lid 2-1 was not detected and monitored (see reference). Figure 5 (A)) Pull-out film 2-1B (refer to) Figure 5 (A)) is located where in the circumference of cover 2-1.

[0065] When the foremost lid 2 covers the container 1, for example, if the pull tab 2-1B of the subsequent lid 2-1 extends towards the foremost lid 2 and the pull tab 2-1B enters under the lid 2, then when the lid 2 covers the container 1, there is a situation where the lid 2-1 is pulled along by the lid 2. Therefore, a so-called "double lid" is created. Furthermore, there is a space between the lower part 2A and the outer surface of the container 1, and the pull tab 2-1B of the subsequent lid 2-1 will enter this part (see reference). Figure 5 (C)), therefore, in continuous production, it is difficult to eliminate the problem by targeting only the subsequent cover 2-1.

[0066] Although this double-lid situation arises because the force that moves container 1 is stronger than the vacuum-based holding force that keeps the lid fixed in place, if the force that moves container 1 is not stronger than the force that moves container 1 based on the vacuum-based holding force, then... Figure 5 (A) The cover 2 covering the opening 1A of the container cannot move with the container 1.

[0067] Here, according to the action of the filling and sealing machine 60 after and the container 1 at the press-bending device 20, there are two types of so-called "two-continuous-covers". One of the two types of "two-continuous-covers" is as shown in FIG. 6, in which the subsequent cover 2-1 is in close contact with the surface of the container 1. Figure 7 Figure 8 The other type of two-continuous-covers is as shown in FIG. 7, in which the subsequent cover 2-1 is raised upward from the surface of the container 1.

[0068] In the type of two-continuous-covers as shown in FIG. 6, in which the subsequent cover 2-1 (see FIG. 6 (C)) is carried away by the container 1, at the press-bending device 20 (see FIG. 6 (B)), the moving belt 21 is sandwiched and pressed by the press-bending plate 22, and as a result, in a state in which the pull tab 2-1B of the subsequent cover 2-1 enters between the lower hem portion 2A of the cover 2 and the outer surface of the container 1, the subsequent cover 2-1 is in close contact with the surface of the container 1. Figure 7 Figure 5 (C)) is carried away by the container 1, at the press-bending device 20 (see FIG. 6 (B)), the moving belt 21 is sandwiched and pressed by the press-bending plate 22, and as a result, in a state in which the pull tab 2-1B of the subsequent cover 2-1 enters between the lower hem portion 2A of the cover 2 and the outer surface of the container 1, the subsequent cover 2-1 is in close contact with the surface of the container 1. Figure 2

[0069] Figure 7 In the state as shown in FIG. 6 (two-continuous-covers in which the subsequent cover 2-1 is in close contact with the surface of the container 1), it becomes a case in which the subsequent cover 2-1 exists in a region below the mouth portion of the container 1 in which the cover 2 (the lower hem portion 2A, the pull tab 2B) does not exist in a normal state of the two-continuous-covers.

[0070] On the other hand, in the two-continuous-covers as shown in FIG. 7, in which the subsequent cover 2-1 is in close contact with the surface of the container 1 in a state in which the pull tab 2-1B of the subsequent cover 2-1 enters between the lower hem portion 2A of the cover 2 and the outer surface of the container 1, and the two-continuous-covers of FIG. 6 are the same, but a part of the subsequent cover 2-1 is raised above the container 1, and the subsequent cover 2-1 extends to a region in which the cover 2 does not exist in a normal state of the two-continuous-covers, that is, a region above the container 1. Figure 8 Figure 7

[0071] In the detection device of the illustrated embodiment, the detection of the two-continuous-covers of the type as shown in FIG. 6 (in this specification, there is a case in which it is described as "close-contact-type two-continuous-covers") in which the subsequent cover 2-1 is in close contact with the outer surface of the container 1 is performed by means of the proximity sensor 3. Figure 7 Figure 8 On the other hand, the detection of the two-continuous-covers of the type as shown in FIG. 7, that is, the two-continuous-covers in which the subsequent cover 2-1 is raised from the surface of the container 1 (in this specification, there is a case in which it is described as "raised-type two-continuous-covers") is performed by means of the penetration-type sensor 4. Here, the penetration-type sensor 4 is an example of a sensor provided with a signal transmitter 4A (for example, a light projector) and a signal receiver 4B (for example, a light receiver).

[0072] First, the detection of the two-continuous-covers of the type as shown in FIG. 6, that is, the detection of the "close-contact-type two-continuous-covers" will be described. Figure 7 ​​​​​​​

[0073] Figure 2 In the case of detecting the double lid 2, the detection device 10 is provided to the press-bending device 20. In the press-bending device 20, the container 1 is moved in the arrow X direction while being rotated in the arrow Z direction by the moving belt 21 and the press-bending plate 22. The moving belt 21 and the press-bending plate 22 are provided on both sides (in the up-down direction) of the path in which the container 1 is moved in the arrow X direction while being rotated in the arrow Z direction. The proximity sensor 3 is provided at a position along the path. Figure 2

[0074] In the illustrated embodiment, six proximity sensors 3 are provided in the downstream side region of the container moving direction of the path. As shown in FIG. 6, the proximity sensor 3 is installed to the press-bending device main body via a bracket 3A at a position close to the moving belt 21. The reason why six proximity sensors 3 are provided in the illustrated embodiment will be described later. Figure 2 Figure 3 In the A-A cross section of FIG. 7, the detection region RIl of the proximity sensor 3 is a region slightly lower than the lid 2 (including the lower hanging portion 2A and the pull tab 2B) of the passing container 1. Therefore, in the detection region RIl, the lid 2 (2-1) is not present in the normal state (state in which the double lid is not present) in which the lid 2 is not present on the outer surface of the container 1 (the subsequent lid 2-1 is not in contact with the container 2). In other words, the detection region RIl is a region in which the lid 2 is not detected in the normal state.

[0075] In the A-A cross section of FIG. 7, the detection region RIl of the proximity sensor 3 is a region slightly lower than the lid 2 (including the lower hanging portion 2A and the pull tab 2B) of the passing container 1. Therefore, in the detection region RIl, the lid 2 (2-1) is not present in the normal state (state in which the double lid is not present) in which the lid 2 is not present on the outer surface of the container 1 (the subsequent lid 2-1 is not in contact with the container 2). In other words, the detection region RIl is a region in which the lid 2 is not detected in the normal state. Figure 2 Figure 3 In the A-A cross section of FIG. 7, the detection region RIl of the proximity sensor 3 is a region slightly lower than the lid 2 (including the lower hanging portion 2A and the pull tab 2B) of the passing container 1. Therefore, in the detection region RIl, the lid 2 (2-1) is not present in the normal state (state in which the double lid is not present) in which the lid 2 is not present on the outer surface of the container 1 (the subsequent lid 2-1 is not in contact with the container 2). In other words, the detection region RIl is a region in which the lid 2 is not detected in the normal state.

[0076] On the contrary, in the case where the double lid 2 is present (refer to FIG. 8), a part of the subsequent lid 2-1 is in contact with the outer surface of the container 1 in the detection region RIl. Therefore, as long as the double lid 2 is present, the subsequent lid 2-1 is in contact with the surface of the container 1 in the detection region RIl and is detected by the proximity sensor 3. Figure 7 Figure 7

[0077] Figure 2 In the A-A cross section of FIG. 7, the detection region RIl of the proximity sensor 3 is a region slightly lower than the lid 2 (including the lower hanging portion 2A and the pull tab 2B) of the passing container 1. Therefore, in the detection region RIl, the lid 2 (2-1) is not present in the normal state (state in which the double lid is not present) in which the lid 2 is not present on the outer surface of the container 1 (the subsequent lid 2-1 is not in contact with the container 2). In other words, the detection region RIl is a region in which the lid 2 is not detected in the normal state. Figure 3 Figure 7

[0078] As described above, when the double lid 2 is present, a part of the subsequent lid 2-1 is in contact with the region of the surface of the container 1 in which the lid 2 is not present in the normal state (state in which the double lid is not present) (the detection region RIl in FIG. 7) (refer to FIG. 8). Figure 3 Figure 7

[0079] ​​​​​​​​​When a metallic aluminum (covers 2 and 2-1 are made of aluminum) is near the inspection area RI1 where covers 2 and 2-1 are not normally present, the subsequent aluminum cover 2-1 is detected by proximity sensor 3. Since cover 2 (the subsequent cover 2-1) is present on the surface of container 1 (inspection area RI1 of proximity sensor 3) where cover 2 (the subsequent cover 2-1) is not normally present, it can be confirmed that a portion of the subsequent cover 2-1 exists in inspection area RI1, thus determining that a tightly sealed double cover has been formed.

[0080] For reference Figure 11 As explained later, if a tight-fitting double cover is detected, an alarm will be triggered, and other necessary processing and procedures will be performed.

[0081] Since as long as container 1 is in a normal state (without producing a tight-fitting double cover), proximity sensor 3 does not detect aluminum (cover 2, and subsequent cover 2-1), it can be determined that container 1 is normal (without producing a tight-fitting double cover).

[0082] Here, in the Figure 2 The location indicated by the reference numeral "P" in the attached diagram, which is near the entrance of the travel path of container 1, cannot be determined in advance at which point in the circumferential direction the subsequent cover 2-1 of the tight-fitting double cover will be in close contact with container 1. Furthermore, since the inspection area RI1 of proximity sensor 3 cannot be accurately detected unless it is set at a very close distance to proximity sensor 3, if the distance between proximity sensor 3 and container 1 is not very close, it is impossible to detect the presence of the subsequent cover 2-1 in inspection area RI1.

[0083] Therefore, when only one proximity sensor 3 is set, based on the circumferential position of the container 1 that is tightly sealed by the subsequent cover 2-1 of the double cover, even if a tightly sealed double cover is generated ( Figure 7 The subsequent cover 2-1 also does not exist in the inspection area RI1, and the proximity sensor 3 cannot detect the situation of the close-fitting double cover.

[0084] In the illustrated embodiment, container 1 rotates in the Z direction while moving in the X direction (see reference). Figure 2 Therefore, if six proximity sensors 3 are set up, and each proximity sensor 3 is arranged at a position 60° apart from the center corner of the container 1 so as to detect the circumferential direction of the container 1 at equal intervals, then the entire circumferential area of ​​the container 1 can be detected by means of proximity sensors 3.

[0085] According to the inventor's experiments, as long as six proximity sensors 3 are set up and configured such that each proximity sensor 3 detects the circumferential position of the container 1 at 60° intervals from the center angle of adjacent proximity sensors 3, then... Figure 7The exact location of the subsequent cap 2-1 on the circumference of container 1 can be accurately detected.

[0086] In addition, Figure 2 In the middle, six proximity sensors 3 are set up in the upstream and downstream directions of the area ( Figure 2 The dimension L (in the left-right direction) is set to be slightly longer than the outer perimeter of container 1, so as to reduce the risk of missed detection.

[0087] In the illustrated embodiment, a proximity sensor 3 is provided on the opposite side of the bending plate 22 (the side of the moving belt 21) regarding the travel path of the container 1.

[0088] As mentioned above, the proximity sensor 3 must be very close to the covers 2 and 2-1 (aluminum) to detect contact, and this distance requirement is very strict. Therefore, if the proximity sensor 3 is positioned on the side of the bending plate 22 to detect the tightly closed dual covers, the proximity sensor 3 will interfere with the bending plate 22. (Refer to...) Figure 3 It can be seen that it is difficult to place the proximity sensor 3 on the side of the bending plate 22.

[0089] Therefore, in the illustrated embodiment, the proximity sensor 3 is not located on the side of the bending plate 22 with respect to the travel path of the container 1, but is located on the side of the moving belt 21 opposite to the bending plate 22.

[0090] In the illustrated embodiment, since the cover 2 is made of aluminum, the proximity sensor 3 is of the metal-sensing type. However, in the case of a non-metallic cover, such as a tight-fitting double cover (double cover), it is also possible to detect the metal by using a proximity sensor of the type that reacts to materials other than metal.

[0091] In other words, regarding the detection of "close-fitting double-lid" covers based on proximity sensors, by selecting an appropriate type of proximity sensor, it can also be applied to covers made of different materials than cover 2 in the illustrated embodiment. However, the material of the cover to be detected must be different from the material of the container.

[0092] Here, proximity sensor 3 can detect a tight-fitting double-lid that is in close contact with the container surface. Figure 7 ),but Figure 8 The "tilted double cap" shown cannot be detected by proximity sensor 3. Although the position of the tilted double cap depends on the tilting condition, it is located in the area above container 1, so the distance from proximity sensor 3 is long. For proximity sensor 3, it is difficult to set the inspection area RI1 to a position that can detect the "tilted double cap".

[0093] Therefore, in the illustrated embodiment, Figure 8The "lifted double lid" shown is detected by a penetration type sensor 4 (an example of a sensor provided with a signal transmitter 4A and a signal receiver 4B).

[0094] Figure 2 In the case of the lifted double lid, the detection device 10A is configured using a penetration type sensor 4 (penetration type fiber sensor) disposed in the path of movement of the container 1 of the press-bending device 20. The penetration type sensor 4 is mounted to the press-bending device body via a bracket 4C in the region of the downstream side (right side in the case shown) of the aforementioned path. Figure 2

[0095] As described above, there are two types of double lid, the sealed double lid and the lifted double lid, but in the embodiment shown, the detection device for the sealed double lid is indicated by reference numeral "10" and the detection device for the lifted double lid is indicated by reference numeral "10A". In the embodiment shown, both the detection device for the sealed double lid 10 and the detection device for the lifted double lid 10A are provided.

[0096] Further, as described above, the penetration type sensor 4 is an example of a sensor provided with a signal transmitter 4A and a signal receiver 4B.

[0097] As shown in Figure 2 , Figure 9 The penetration type sensor 4 is provided with an irradiation side unit 4A (for example, a light projector) and a receiving side sensor 4B (for example, a light receiver), the light projector 4A and the light receiver 4B being disposed on opposite sides of the path of the container 1.

[0098] In the embodiment shown, light rays LT are irradiated from the light projector 4A to the light receiver 4B. In the case of the occurrence of a lifted double lid, the subsequent lid 2-1 that is lifted will shield the irradiation light LT irradiated from the light projector 4A to the light receiver 4B, and therefore the light receiver 4B will not receive the irradiation light LT. Thus, the penetration type sensor 4 detects the occurrence of a lifted double lid.

[0099] The detection of a lifted double lid by means of the penetration type sensor 4 will be further described with reference to Figure 9 .

[0100] Figure 9 In the case shown, the detection region RI2 of the penetration type sensor 4 based on the irradiation light LT is a region above the mouth of the lid 2 of the passing container 1.

[0101] Therefore, in the normal state in which a lifted double lid has not occurred, the subsequent lid 2-1 is not present in the detection region RI2, and the irradiation light LT irradiated from the light projector 4A is not shielded and is received by the light receiver 4B. Thus, it is possible to determine that a lifted double lid has not occurred.

[0102] ​On the other hand, in the case of the occurrence of the lifted two-covers, a part of the subsequent cover 2-1 passes through the detection region R12. Here, as shown in Figure 8 Figure 8 the subsequent cover 2-1 is lifted from the surface of the container 1 (refer to

[0103] In other words, in the illustrated embodiment, the detection region R12 is a region in which the irradiation light LT is not shielded in the normal state in which the lifted two-covers are not generated, but the irradiation light LT is shielded by the subsequent cover 2-1 in the state in which the lifted two-covers are generated.

[0104] Figure 11 As described later, in the case of the detection of the lifted two-covers, an alarm, other necessary processing, or the like is executed.

[0105] In the illustrated embodiment, the light projector 4A and the light receiver 4B are arranged on both sides of the path of the container 1.

[0106] However, the light projector 4A and the light receiver 4B can also be arranged on the same side with respect to the path of the container 1. For example, if the light receiver 4B is arranged at a position at which the irradiation light LT reflected by the subsequent cover 2-1 can be received, in the normal state in which the lifted two-covers are not generated, the irradiation light LT irradiated from the light projector 4A is not received by the light receiver 4B, but in the case of the lifted two-covers in which the subsequent cover 2-1 is lifted, the irradiation light LT from the light projector 4A is reflected by the lifted subsequent cover 2-1 and is detected by the light receiver 4B. Thus, the generation of the lifted two-covers can be detected.

[0107] However, in the lifted two-covers, the size, position, angle, shape, or the like of the lifted subsequent cover 2-1 varies, and thus in order to improve the detection accuracy of the lifted two-covers, the light receiver 4B must be arranged so that the light reflected by the lifted subsequent cover 2-1 can be actually received by the light receiver 4B.

[0108] In addition, the sensor for the detection of the lifted two-covers is not limited to the penetration type sensor 4 that irradiates light from an irradiator. Although not explicitly shown, by irradiating, for example, ultrasonic waves and receiving the ultrasonic waves by an ultrasonic wave sensor, the lifted two-covers can also be detected. However, in the case in which the container 1 moves at a high speed (for example, at a speed of about 40 m per minute), it is difficult to detect the lifted two-covers by ultrasonic waves.

[0109] In the illustrated embodiment, as shown in​​Figure 2 As shown, on the path of container 1, proximity sensor 3 is configured on the upstream side and penetration sensor 4 is configured on the downstream side.

[0110] However, it is also possible to configure the penetrating sensor 4 on the upstream side of the proximity sensor 3.

[0111] Figure 10 In the process, the penetrating sensor 4 is positioned on the upstream side along the path of the container 1's movement. Figure 10 (Left side in the middle), proximity sensor 3 is positioned downstream of the penetrating sensor 4. Even if the penetrating sensor 4 is placed as... Figure 10 As shown, it is positioned upstream of proximity sensor 3, and can also achieve [the following]. Figure 2 The same effect applies to the same situation.

[0112] In the illustrated embodiment, the proximity sensor 3 for detecting the tightly sealed double-sided cover and the penetration sensor 4 for detecting the warped double-sided cover are located in the bending device 20, but the detection devices 10 and 10A for the double-sided cover can also be located in a location other than the bending device 20.

[0113] However, in order to detect "close-fitting double-lids" that are in close contact with container 1, the proximity sensor 3 is preferably combined with a mechanism that rotates the container, such as the combination of the moving belt 21 and the bending plate 22. Furthermore, when the proximity sensor 3 is located outside the bending device 20, the number of proximity sensors 3 is not limited to six as described above.

[0114] On the other hand, in order to detect "curved double caps" that belong to the type of curved double caps, the penetrating sensor 4 does not have a mechanism that needs to be combined separately, but the curvature must be completed at the time of inspection. Therefore, it is preferable to set the rotation mechanism of the bending device 20 or the like during or after the passage.

[0115] In order to effectively detect different types of double covers, the double cover detection device is preferably a combination of proximity sensor 3 and penetration sensor 4. However, as long as the occurrence pattern of the double cover can be controlled, it is also possible to detect it using only a single sensor.

[0116] Next, mainly refer to Figure 11 Explain the order of testing for the double-lid cover.

[0117] Figure 11 In step S1, using proximity sensor 3 ( Figure 2 , Figure 3 Determine whether a moving container 1 has been detected. Figure 2 ) two-piece cover ( Figure 7 Tightly connected two-piece cover).

[0118] If the cap 2 (the subsequent cap 2-1) is detected in the inspection area RI1 (an area in which the cap 2 is not present in the normal state) near the proximity sensor 3 (Step S1: Yes), it is determined that the tight-type double cap (detected) is generated at the container 1, and if the cap 2 is not detected in the inspection area RI1, it is determined that the tight-type double cap (not detected) is not generated at the container 1 (Step S1: No). Figure 3 If the cap 2 (the subsequent cap 2-1) is detected in the inspection area RI1 (an area in which the cap 2 is not present in the normal state) near the proximity sensor 3 (Step S1: Yes), it is determined that the tight-type double cap (detected) is generated at the container 1, and if the cap 2 is not detected in the inspection area RI1, it is determined that the tight-type double cap (not detected) is not generated at the container 1 (Step S1: No).

[0119] If the cap 2 (the subsequent cap 2-1) is detected in the inspection area RI1 (an area in which the cap 2 is not present in the normal state) near the proximity sensor 3 (Step S1: Yes), it is determined that the tight-type double cap (detected) is generated at the container 1, and if the cap 2 is not detected in the inspection area RI1, it is determined that the tight-type double cap (not detected) is not generated at the container 1 (Step S1: No).

[0120] In Step S2 (in the case where the tight-type double cap is not detected), it is determined whether the outer surface of the container 1 moving on the path detects the double cap (the lift-type double cap, Figure 2 , Figure 9 ) by means of the penetration-type sensor 4. Figure 8 Figure 8 If the cap 2 (the subsequent cap 2-1) is detected in the inspection area RI1 (an area in which the cap 2 is not present in the normal state) near the proximity sensor 3 (Step S1: Yes), it is determined that the tight-type double cap (detected) is generated at the container 1, and if the cap 2 is not detected in the inspection area RI1, it is determined that the tight-type double cap (not detected) is not generated at the container 1 (Step S1: No).

[0121] If the cap 2 (the subsequent cap 2-1) is detected in the inspection area RI1 (an area in which the cap 2 is not present in the normal state) near the proximity sensor 3 (Step S1: Yes), it is determined that the tight-type double cap (detected) is generated at the container 1, and if the cap 2 is not detected in the inspection area RI1, it is determined that the tight-type double cap (not detected) is not generated at the container 1 (Step S1: No). Figure 9 If the cap 2 (the subsequent cap 2-1) is detected in the inspection area RI1 (an area in which the cap 2 is not present in the normal state) near the proximity sensor 3 (Step S1: Yes), it is determined that the tight-type double cap (detected) is generated at the container 1, and if the cap 2 is not detected in the inspection area RI1, it is determined that the tight-type double cap (not detected) is not generated at the container 1 (Step S1: No).

[0122] If the cap 2 (the subsequent cap 2-1) is detected in the inspection area RI1 (an area in which the cap 2 is not present in the normal state) near the proximity sensor 3 (Step S1: Yes), it is determined that the tight-type double cap (detected) is generated at the container 1, and if the cap 2 is not detected in the inspection area RI1, it is determined that the tight-type double cap (not detected) is not generated at the container 1 (Step S1: No).

[0123] If the cap 2 (the subsequent cap 2-1) is detected in the inspection area RI1 (an area in which the cap 2 is not present in the normal state) near the proximity sensor 3 (Step S1: Yes), it is determined that the tight-type double cap (detected) is generated at the container 1, and if the cap 2 is not detected in the inspection area RI1, it is determined that the tight-type double cap (not detected) is not generated at the container 1 (Step S1: No).

[0124] Figure 1 If the cap 2 (the subsequent cap 2-1) is detected in the inspection area RI1 (an area in which the cap 2 is not present in the normal state) near the proximity sensor 3 (Step S1: Yes), it is determined that the tight-type double cap (detected) is generated at the container 1, and if the cap 2 is not detected in the inspection area RI1, it is determined that the tight-type double cap (not detected) is not generated at the container 1 (Step S1: No).

[0125] If the cap 2 (the subsequent cap 2-1) is detected in the inspection area RI1 (an area in which the cap 2 is not present in the normal state) near the proximity sensor 3 (Step S1: Yes), it is determined that the tight-type double cap (detected) is generated at the container 1, and if the cap 2 is not detected in the inspection area RI1, it is determined that the tight-type double cap (not detected) is not generated at the container 1 (Step S1: No).

[0126] ​​Once the steps S3, S4 are completed, the process returns to step S1 to perform the same process on the next container 1.

[0127] Here, Figure 11 The order shown, the step S1 and step S2 can be performed in reverse, and, also, the step S1 and step S2 can be performed simultaneously.

[0128] If according to the illustrated embodiment, the detection device 10, along the path of the container 1 moving is provided with a proximity sensor 3, in the normal state where the double cover (double cover, tightness type, Figure 7 ) does not produce a tight contact with the outer surface of the container 1, the proximity sensor 3 detects the absence of the inspection area Rl 1 of the container surface of the cover 2 (2-1). On the other hand, if the subsequent cover 2-1 is in tight contact with the container surface (in the case of a double cover, tightness type, Figure 7 ), the part of the subsequent cover 2-1 taken away will exist in the inspection area Rl 1. Thus, in the case of a double cover, tightness type, the proximity sensor 3 detects the presence of the subsequent cover 2-1, and can detect the situation of the double cover, tightness type.

[0129] In addition, when the proximity sensor 3 is arranged, in the long direction of the moving path of the container 1, in the range of the outer peripheral dimension of the container 1, six (or more) proximity sensors 3 are arranged, the distance between adjacent proximity sensors 3 is arranged to be equal to the central angle 60° in the circumferential direction of the container 1, and the circumferential direction of the rotating container 1 is inspected at equal intervals. Therefore, in the double cover, tightness type, no matter where the subsequent cover 2-1 exists on the circumference of the container 1, it can be detected.

[0130] In addition, if according to the illustrated embodiment, the detection device 10A, along the path of the container 1 moving is provided with a penetration type sensor 4, in the case where the double cover, Figure 8 ) is produced on the container 1, the detection area Rl 2 where the cover 2 does not exist in the normal state is inspected. Therefore, in the case where the subsequent cover 2-1 is raised away from the outer circumference of the container (in the case where the double cover, raised type, is produced), the raised subsequent cover 2-1 will shield the light rays or the like (there are also cases where ultrasonic waves or the like are irradiated) irradiated from the irradiation side 4A (for example, a light projector) of the penetration type sensor 4, so that the signal receiving side 4B (for example, a light receiver) cannot receive the irradiated light or the like.

[0131] Therefore, when the container 1 passes through the part provided with the penetration type sensor 4, if the irradiated light or the like is not perceived by the receiving side 4B, in the case where the subsequent cover 2-1 is raised away from the outer circumference of the container, the raised subsequent cover 2-1 will shield the irradiated light or the like in the inspection area Rl 2, so that the situation of the double cover, raised type, is detected.

[0132] Further, in the illustrated embodiment provided with the detection device 10, 10A, the proximity sensor 3 and the penetration type sensor 4 are disposed along the path of movement of the container 1, and even if Figure 7 the subsequent cap 2-1 is of the type of a close type two-piece cap that is close to the surface of the container, or even if Figure 8 the subsequent cap 2-1 is of the type of a lift type two-piece cap that is lifted away from the outer periphery of the container, detection can be performed with certainty.

[0133] Here, although the proximity sensor 3 and the penetration type sensor 4 are provided at the detection device 10, 10A, respectively, a camera is not provided, and it is not necessary to take an image of the container after the cap is carried. Therefore, it is not necessary to provide a mechanism for providing a camera at the production line.

[0134] Further, if compared with a camera, the proximity sensor 3 and the penetration type sensor 4 are inexpensive, and therefore, compared with the case where an expensive camera is provided, it is possible to reduce the cost of the entire production line.

[0135] In addition to this, in the illustrated embodiment, since the proximity sensor 3 and / or the penetration type sensor 4 are provided at the press-bending device 20, the container 1 is rotated by the movement belt 21 and the press-bending plate 22, and during the period in which the lower hanging portion 2A and the pull tab 2B of the cap 2 are close to the container 1, it is possible to detect Figure 7 the close type two-piece cap. Furthermore, it is possible to detect Figure 8 the lift type two-piece cap and the close type two-piece cap at approximately the same time.

[0136] Incidentally, the illustrated embodiment is merely an example, and is not a description of the purpose of limiting the technical scope of the present application.

[0137] Explanation of Reference Signs

[0138] 1... Container

[0139] 1A... Opening portion

[0140] 2... Cap

[0141] 3... Proximity sensor

[0142] 4... Penetration type sensor 4

[0143] 4A... Light projector (emission side device)

[0144] 4B... Light receiver (reception side sensor)

[0145] 20... Press-bending device

[0146] 10, 10A... Detection device

[0147] 100... Manufacturing device

Claims

1. A dual-cover detection device, characterized in that, On the production line for products where the container opening is sealed with a cap, Proximity sensors are installed along the path the container moves along. The area detected by this proximity sensor is the area where, under normal conditions, there would be no lid, or where two lids are installed consecutively on a container, with the subsequent lid making close contact with the container surface. This proximity sensor is used to detect containers with two lids installed continuously.

2. The dual-cover detection device as described in claim 1, characterized in that, The aforementioned proximity sensor is located in the area where the container rotates along the path the container is being transported.

3. The dual-cover detection device as described in claim 1 or 2, characterized in that, The aforementioned proximity sensors are arranged in multiple units along the path the container is transported, within a range approximately the same size as the outer perimeter of the container.

4. A dual-lid detection device, characterized in that, On the production line for products where the container opening is sealed with a cap, Sensors equipped with signal transmitters and receivers are installed along the path of the container's movement. The sensor detects areas where, under normal conditions, there are no lids, two lids are consecutively installed on a container, and the subsequent lid detaches from the container surface and tilts upwards. This sensor is used to detect containers with two lids installed continuously.

5. The dual-cover detection device as described in claim 4, characterized in that, The aforementioned sensor is placed in the area where the container rotates or in the area after the rotation along the path the container is transported.

6. The dual-cover detection device as described in claim 4 or 5, characterized in that, The aforementioned sensor is a penetrating sensor.

7. A dual-cover detection device, characterized in that, On the production line for products where the container opening is sealed with a cap, Two types of sensors are used: a proximity sensor along the path the container moves along, and a sensor with a signal transmitter and a signal receiver along the same path. The area detected by the aforementioned proximity sensor is an area where, under normal conditions, there would be no lid, two lids are installed consecutively on a container, and the subsequent lid will be in close contact with the container surface. The area detected by the sensor equipped with the aforementioned transmitter and receiver is an area where, under normal conditions, there is no lid, two lids are consecutively installed on a container, and the subsequent lid peels off from the container surface and curls upwards. The detection of containers with two lids installed continuously is performed using the aforementioned proximity sensor and / or a sensor equipped with the aforementioned transmitter and receiver.

8. The dual-cover detection device as described in claim 7, characterized in that, The aforementioned proximity sensor is located in the area where the container rotates along the path the container is being transported.

9. The dual-cover detection device as described in claim 7, characterized in that, Along the path along which the container is transported, multiple proximity sensors are provided within a range roughly the same size as the outer perimeter of the container.

10. The dual-cover detection device as described in claim 8, characterized in that, Along the path along which the container is transported, multiple proximity sensors are provided within a range roughly the same size as the outer perimeter of the container.

11. The dual-cover detection device as described in any one of claims 7 to 10, characterized in that, The sensor, equipped with the aforementioned transmitter and receiver, is located in the area where the container rotates or in the area after the rotation along the path in which the container is transported.

12. The dual-cover detection device as described in any one of claims 7 to 10, characterized in that, The sensor equipped with the aforementioned transmitter and receiver is a penetrating sensor.

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