JP5572446B2 - Container push-up device - Google Patents

Description

  The present invention relates to a container push-up device that pushes up a reversing part that protrudes outward from the bottom of a container and reverses the reversing part to the inside of the container.

  There are various kinds of containers for storing liquid contents such as beverages. As one type, containers made of synthetic resin, for example, blow molded bottles (PET bottles) made of polyethylene terephthalate are known. In the bottle of this type, when the heated sealed contents are cooled, the inside of the bottle may be in a reduced pressure state due to a decrease in the volume of the contents, and the container body may be slightly deflated. In order to suppress such deformation of the bottle, which is undesirable in appearance, Patent Document 1 discloses a bottle having a flexible inversion portion in which a part of the bottom of the bottle is protruded downward. The filling of the contents into the bottle with the reversing part is performed in a state where the reversing part protrudes outside the bottom of the bottle. And after sealing a bottle mouth part with a cap, the inversion part which protruded outside is pushed in and it inverts inside a bottle. By reducing the volume due to the reversal, the inside of the bottle is pressurized and the reduced pressure accompanying the cooling of the contents is offset, so that deformation of the bottle is effectively suppressed. Patent Document 2 discloses such a bottom recessed device for a bottle with a reversing part.

  Also, a defect detection mechanism that detects a reversal failure of a reversing unit is conventionally known. FIG. 10 is an explanatory diagram of a conventional defect detection mechanism. In a state where the bottle 30 filled and sealed with the contents is held, the reversing portion 30 a provided at the bottom of the bottle 30 is pushed up using a movable push-up punch 31. By this activation processing, the reversing part 30 a protruding downward from the bottom of the bottle 30 is deformed and reversed, and is pushed into the bottle 30. The follower mechanism 32 such as a spring causes the push-up punch 31 to follow the shape of the reversing part 30a by constantly biasing the push-up punch 31 upward. Here, a defect detection sensor 33 is provided at the lower end of the push-up punch 31 as a mechanism for detecting a reversal failure of the reversing portion 30a, that is, a lack of pushing. As shown in FIG. 5A, when the reversing portion 30a is properly reversed and sufficiently pushed into the bottle, the push-up punch 31 is appropriately displaced upward following the shape of the reversing portion 30a. To do. In this case, the lower end of the push-up punch 31 does not come into contact with the defect detection sensor 33 or even if it comes into contact, the degree is slight. When the stroke amount (downward displacement amount) of the defect detection sensor 33 constantly biased upward by a spring or the like (not shown) is less than a predetermined threshold value, it is determined that the reversal of the reversing unit 30a is good (normal). Is done. On the other hand, as shown in FIG. 4B, when the reversing portion 30a is not sufficiently reversed and is not sufficiently pushed into the bottle, the shape of the reversing portion 30a is followed and the push-up punch 31 is moved upward. The amount of displacement is also insufficient. In this case, the lower end of the push-up punch 31 comes into contact with the defect detection sensor 33, and the defect detection sensor 33 is pushed downward against the upward biasing force. When the stroke amount of the defect detection sensor 33 is equal to or greater than a predetermined threshold value, it is determined that the reversal of the reversing unit 30a is defective.

JP-T-2006-501109 JP 2009-096504 A

  However, in the conventional defect detection mechanism described above, since a defect detection sensor is provided for each bottle that is a target of defect detection, a large number of mechanical parts such as sensors and springs attached thereto are required. For example, when the number of bottles accommodated in the turntable is 20, 20 sensors and 20 machine parts are required. Further, as the number of sensors increases, the labor required for exchanging consumables increases, and the frequency of sensor malfunctions and failures increases. Therefore, there is a concern that productivity may be reduced due to the stoppage of the production line. Furthermore, since the good / bad determination of the reversing part is performed with a subtle stroke amount (for example, in 0.5 mm units) of the sensor, the labor required for the adjustment increases as the number of sensors increases.

  Therefore, an object of the present invention is to simplify the defect detection mechanism in the container push-up device and to improve the maintainability.

  In order to solve such a problem, the first invention has a plurality of mounting bases, a plurality of push-up punches, a lifting mechanism, a biasing member, and a defect detection sensor, and protrudes outward from the bottom of the container. Provided is a container push-up device that pushes up an inversion portion and reverses the inside of the container. Each of the plurality of mounting tables moves on the conveyance path, and a container is mounted on each of the mounting tables. The plurality of push-up punches are provided corresponding to each of the mounting tables, and individually reverse the inversion portions of the containers placed on the mounting tables. The raising / lowering mechanism raises / lowers each of the push-up punches. The urging member urges each of the push-up punches upward to cause the raising / lowering position of the push-up punch to follow the shape of the reversing part. The defect detection sensor is provided at a predetermined transport position in the transport path, and detects the lift position of the push-up punch each time the push-up punch passes through the predetermined transport position.

  The second invention has a rotatable turntable, a plurality of push-up punches, an elevating mechanism, a biasing member, and a defect detection sensor, and pushes up the reversing portion protruding outward from the bottom of the container. A container push-up device for reversing the inside of a container is provided. The turntable is provided with a plurality of mounting tables on which the containers are mounted in the circumferential direction. The plurality of push-up punches are provided corresponding to each of the mounting tables, and individually reverse the inversion portions of the containers placed on the mounting tables. The raising / lowering mechanism raises / lowers each of the push-up punches. The urging member urges each of the push-up punches upward to cause the raising / lowering position of the push-up punch to follow the shape of the reversing part. The defect detection sensor is provided at a predetermined transfer position on the turntable, and detects the lift position of the push-up punch each time the push-up punch passes through the predetermined transfer position.

  Here, in the first or second invention, a plurality of amplifying levers may be further provided that are provided corresponding to each of the mounting tables and individually amplify the displacement of the push-up punch. In this case, it is preferable that the defect detection sensor detects a position where the displacement is amplified by the amplification lever as the lift position. Further, the defect detection sensor may be a non-contact sensor that detects whether or not the end of which the displacement is amplified by the amplification lever is opposed. Furthermore, it is preferable that the defect detection sensor is provided at at least one of a conveyance position before the reversing unit is reversed and a conveyance position after the reversing unit is reversed.

  The third invention has a plurality of mounting tables, a plurality of push-up punches, an elevating mechanism, a biasing member, a plurality of amplification levers, and at least one defect detection sensor, and outward from the bottom of the container. Provided is a container push-up device that pushes up a protruding inversion portion and reverses the inside of the container. Each of the plurality of mounting tables moves on the conveyance path, and a container is mounted on each of the mounting tables. The plurality of push-up punches are provided corresponding to each of the mounting tables, and individually reverse the inversion portions of the containers placed on the mounting tables. The raising / lowering mechanism raises / lowers each of the push-up punches. The urging member urges each of the push-up punches upward to cause the raising / lowering position of the push-up punch to follow the shape of the reversing part. The defect detection sensor is provided at a predetermined transport position in the transport path, and detects the lift position of the push-up punch each time the push-up punch passes through the predetermined transport position. The plurality of amplification levers are provided corresponding to the push-up punches, and individually amplify the displacement of the push-up punches. At least one defect detection sensor detects a position where the displacement is amplified by the amplification lever.

  A fourth invention has a rotatable turntable, a plurality of push-up punches, an elevating mechanism, a biasing member, a plurality of amplification levers, and at least one defect detection sensor, and is arranged outside from the bottom of the container. A container push-up device is provided that pushes up the reversing part protruding to the inside and reverses the inside. The turntable is provided with a plurality of mounting tables on which the containers are mounted in the circumferential direction. The plurality of push-up punches are provided corresponding to each of the mounting tables, and individually reverse the inversion portions of the containers placed on the mounting tables. The raising / lowering mechanism raises / lowers each of the push-up punches. The urging member urges each of the push-up punches upward to cause the raising / lowering position of the push-up punch to follow the shape of the reversing part. The plurality of amplification levers are provided corresponding to the push-up punches, and individually amplify the displacement of the push-up punches. At least one defect detection sensor detects a position where the displacement is amplified by the amplification lever.

  Here, in the third or fourth invention, the subordinate conceptual configuration according to the first or second invention described above may be applied.

  According to the first or second invention, the raising / lowering position of the push-up punch is detected each time the push-up punch passes through the predetermined transport position by the defect detection sensor provided at the predetermined transport position. Accordingly, since it is not necessary to provide a defect detection sensor for each mounting table, the number of sensors, the number of mechanical parts attached thereto, the number of signal lines connected to the defect sensor, etc. can be reduced, and the defect detection mechanism. Can be simplified. At the same time, it is possible to reduce labor for exchanging consumables, malfunctioning of the sensor, or adjustment of the sensor, so that maintainability can be improved.

  According to the third or fourth invention, since the displacement of the push-up punch is amplified by the amplification lever, even if the displacement of the push-up punch is very small, it can be accurately detected by the defect detection sensor. Accordingly, it is possible to accurately detect a defect of the reversal portion without using an expensive sensor or without exerting more labor than necessary to adjust the sensor.

Configuration diagram of transport mechanism External view of a bottle that is an example of a container Configuration diagram of container push-up device Enlarged view of main parts of container push-up device Activating timing chart Diagram showing normal state before activation The figure which shows the defect state before activation processing Diagram showing normal state after activation The figure which shows the defect state after activation processing Explanatory drawing of conventional defect detection mechanism

  FIG. 1 is a top view of a transport device in which the container pushing-up device according to the present embodiment is mounted. The transport device 1 is mainly composed of a rotatable turntable 2 and includes an input mechanism 3 for supplying a container to the turntable 2 and a discharge mechanism 4 for discharging the container therefrom. On the outer periphery of the turntable 2, a plurality of accommodating portions 2a are provided at predetermined intervals, and containers are accommodated in the respective accommodating portions 2a. And in the process in which a container is conveyed by rotation of the turntable 2, the activation process with respect to the container accommodated in the accommodating part 2a is continuously performed by the container pushing-up apparatus provided later corresponding to each accommodating part 2a. Done. The input mechanism 3 includes an input path 3a, a screw conveyor 3b, and an input turret 3c. The container on the input path 3a conveyed from the upstream (previous process) is sent to the input turret 3c by the rotation of the screw conveyor 3b, and is input to the accommodating portion 2a of the turntable 2 through the input turret 3c. On the other hand, the discharge mechanism 4 includes a discharge turret 4a and a discharge conveyor 4b. The container discharged from the accommodating portion 2a of the turntable 2 is sent to the discharge conveyor 4b through the discharge turret 4a, and is conveyed downstream (post-process) by the discharge conveyor 4b.

  As shown in the figure, the container is put into a certain storage portion 2a at a predetermined insertion position (θ = θin) before the rotation angle θ of the storage portion 2a is 90 °. Further, the container is discharged from the accommodating portion 2a at a predetermined discharge position (θ = θout) after the rotation angle θ is 270 °. Therefore, the range of θin ≦ θ ≦ θout is a substantial conveyance path in the turntable 2. In the process of moving the container within this range, a series of activation processes are performed on each container.

  Defect detection sensors 5a and 5b are provided at predetermined conveyance positions close to the outer periphery of the turntable 2. One defect detection sensor 5a is provided at a predetermined transfer position (θ = θ3) before activation processing, and the container is good / bad before the reversing unit 6e (see FIG. 2) is reversed. Determine. The other defect detection sensor 5b is provided at a predetermined transport position (θ = θ8) after the activation process, and determines whether the container is good or bad after the reversing portion 6e is reversed. To do. One of the features of this embodiment is that, as mentioned in the prior art, a sensor is not provided for each housing portion 2a, but the failure detection sensors 5a and 5b are shared by all the housing portions 2a, and the housing portion 2a. Is that the container accommodated in the accommodating portion 2a is inspected for defects whenever it passes the conveying positions θ3, θ8. As the defect detection sensors 5a and 5b, for example, a non-contact sensor (for example, a photoelectric sensor, a proximity sensor, a laser sensor, or the like) that is turned on when a member to be detected (for example, a metal member) comes close can be used. However, a well-known contact sensor (for example, a touch sensor manufactured by Metrol Co., Ltd.) may be used if wear due to contact with other members is not considered. In this embodiment, the two defect detection sensors 5a and 5b are used to detect defects before and after the activation process. However, when the defect detection target is only one before and after the process. For this, it is sufficient to use only one of the defect detection sensors 5a and 5b.

  In this embodiment, a bottle as shown in FIG. 2 is used as an example of a container to be activated. The bottle 6 is a PET bottle obtained by blow molding a synthetic resin such as polyethylene terephthalate, and is filled and sealed with a liquid content such as a beverage prior to activation processing. The bottle 6 includes a bottle body portion 6a, a bottle shoulder portion 6b, a cap 6c attached to the bottle mouth portion, and an inversion portion 6e formed at the center of the bottle bottom portion 6d. The reversing part 6e can be reversed from a protruding state protruding outward from the bottle bottom 6d to a depressed state recessed inside the bottle 6 due to the flexibility resulting from the material of the bottle 6, and is put into the turntable 2. It is in a protruding state at the time. The inversion part 6e is provided in order to increase the internal pressure of the bottle 6 sealed with the cap 6c. When the liquid content is warm-filled, the volume of the content is reduced by cooling after sealing. Thereby, since the inside of the bottle 6 will be in a pressure-reduced state, the bottle trunk | drum 6a etc. will be in the state slightly deflated. In order to prevent this, after the bottle 6 is sealed, the inside of the bottle 6 is pressurized by reversing the inversion portion 6e in the protruding state into the depressed state. As a result, the reduced pressure due to the cooling of the contents is offset, so that the deformation of the bottle 6 is effectively suppressed. In addition, the contents may be not only those filled under pressure but also those filled at room temperature. This is because increasing the internal pressure of the bottle 6 by the reversing unit 6e contributes to maintaining the shape of the bottle 6 and the like.

  FIG. 3 is a configuration diagram of the container pushing-up device. The container push-up device 7 is individually attached to each accommodating portion 2a of the turntable 2. The container push-up device 7 is mainly composed of a mounting table 8, a holding mechanism 9, a push-up punch 10, an elevating mechanism 11, an amplification lever 12, and an urging member 15. The mounting table 8 is mounted in an opening formed in the turntable 2 so as to be movable up and down. A biasing member 13 such as a spring is provided inside the mounting table 8, and the mounting table 8 is constantly biased upward by the biasing member 13. When the mounting table 8 is raised, the upper surface of the mounting table 8 is substantially flush with that of the turntable 2. The mounting table 3 has a substantially circular shape corresponding to the outer diameter of the bottle 6. The introduction of the bottle 6 to the mounting table 8 and the discharge of the bottle 7 from the mounting table 8 are performed in a state where the mounting table 3 is in the raised position.

  The holding mechanism 9 is fixed to the turntable 2 corresponding to each mounting table 8, and holds the bottle 6 mounted on the mounting table 8. The holding mechanism 9 includes an elevating bar 9a extending in the vertical direction, a drive unit 9b such as a hydraulic cylinder for elevating the elevating bar, a pressing member 9c attached to the tip of the elevating bar 9a, and a holding arm 9d. . The pressing member 9c is disposed immediately above the center of the mounting table 8, and moves up and down by driving of the driving unit 9b. The pressing member 9c is engaged with the cap 6c or the bottle shoulder 6b of the bottle 6 according to the tip shape. When the pressing member 9 c is lowered, the mounting table 8 is pushed down together with the bottle 6 against the upward biasing force by the biasing member 13. In the state where the mounting table 8 is lowered to the lowered position, the bottle bottom 6d is fitted into the turntable 2, and the bottle body 6a is also gripped by the holding arm 9d extending sideways. By this gripping, the lowered bottle 6 is stably held. The activation process for the bottle 6 is performed in a state where the bottle 6 is stably held in this manner. When the pressing member 9c is raised, the mounting table 8 is returned to the raised position by the upward biasing force (returning force) of the biasing member 13.

  The push-up punch 10 is provided corresponding to each mounting table 8 and is located immediately below the center of the mounting table 8. The push-up punch 10 can be inserted into a through-hole penetrating the mounting table 8 in the vertical direction, and extends linearly in the vertical direction, that is, in the height direction of the bottle 6. The tip of the push-up punch 10 faces the reversing part 6e provided at the bottom of the bottle 6 placed on the placing table 8. The push-up punch 10 is attached to a base portion 14 disposed below the mounting table 8, and is movable within a predetermined movable range. The length of the push-up punch 10 is suppressed to a length that does not protrude from the upper surface of the mounting table 8 in the raised position so as not to disturb the sliding of the bottle 6 on the mounting table 8. The base 14 is composed of a single or a plurality of highly rigid metal members, and is slidably attached to a slide bar 16 extending vertically. In addition, a biasing member 15 such as a spring is interposed in the gap between the outer periphery of the push-up punch 10 and the inner periphery of the base portion 14, whereby the push-up punch 10 is always biased upward. By this urging force, the raising / lowering position of the push-up punch 10 follows the shape of the reversing part 6 e of the bottle 6. That is, the push-up punch 10 rises as the downward protrusion amount of the reversing portion 6e decreases, while the push-up punch 10 descends as the protrusion amount increases. When the push-up punch 10 rises and reaches the upper limit of the movable range, the push-up punch 10 is separated from the reversing portion 6e. The reversing part 6 e of the bottle 6 placed on the placing table 8 is pushed up by a pushing punch 10 that is displaced relative to the placing table 8.

  The raising / lowering mechanism 11 raises / lowers the push-up punch 10 provided for each accommodating portion 2 a as the turntable 2 rotates. In this embodiment, the raising / lowering mechanism 11 is implement | achieved by the guide rail 11a and the roller 11b. The guide rail 11 a is disposed adjacent to the turntable 2 and extends in the circumferential direction of the turntable 2. Further, the guide rail 11 a has undulations for defining the lift position of the push-up punch 10. On the other hand, the roller 11b is attached to the base 14, and is engaged with the guide rail 11a. When the roller 11b moves along the guide rail 11a, the roller 11b is displaced according to the undulation of the guide rail 11a. As a result, the push-up punch 10 attached to the base 14 moves up and down. In addition, it may replace with such a mechanical link of the guide rail 11a and the roller 11b, and may perform raising / lowering control with a hydraulic cylinder etc.

  The amplification lever 12 is provided on each of the mounting tables 8, and amplifies the displacement of the push-up punch 10 according to the lever principle. FIG. 4 is an enlarged view of a main part of the container push-up device 7. A fulcrum 12 a of the amplification lever 12 is attached to the base portion 14. Further, one end 12 b (left end) of the amplification lever 12 is close to the push-up punch 10 and is pushed down by the lowering of the push-up punch 10. Further, the other end 12c (right end) of the amplification lever 12 is close to the defect detection sensor 5 (generic name of the above-described 5a and 5b). The length of the amplification lever 12 from the fulcrum 12a to the other end 12c is longer than that from the fulcrum 12a to the one end 12b. Thereby, the secondary displacement on the other end 12c side becomes larger than the primary displacement on the one end 12b side caused by the raising and lowering of the push-up punch 10. Further, a biasing member 17 such as a spring is attached to the other end 12c side of the amplification lever 12, and the amplification lever 12 is always biased so as to be horizontal.

  In the present embodiment, the urging member 15 that directly urges the push-up punch 10 itself is used as a means for causing the raising / lowering position of the push-up punch 10 to follow the shape of the reversing portion 6e of the bottle 6. Instead of or in combination with this, the biasing member 17 attached to the amplification lever 12 may be used. This is because the biasing member 17 also indirectly biases the push-up punch 10 through the amplification lever 12.

  As shown in the figure, the arrangement of the two defect detection sensors 5a and 5b is different. The defect detection sensor 5a for determining the defect before the activation processing is attached so as to face the other end 12c of the amplification lever 12 that rises to the right. Before the activation process, it is normal that the reversing part 6e protrudes downward. In this case, when the push-up punch 10 is lowered by the protrusion of the reversing part 6e and the amplified lever 12 is sufficiently pushed down, the defect detection sensor 5a is turned on. On the other hand, the defect detection sensor 5b for determining the defect after the activation processing is attached so as to face the other end 12c of the horizontal amplification lever 12. In this case, when the push-up punch 10 rises due to the depression of the reversing portion 6e and the amplified lever 12 is hardly pushed down, the defect detection sensor 5b is turned on.

  FIG. 5 is a timing chart of activation processing focusing on a certain accommodating portion 2a. First, when the container 2a reaches the loading position (θ = θin) as the turntable 2 rotates, the bottle 6 is loaded into the container 2a from the loading turret 3c shown in FIG. The charged bottle 6 is set on the mounting table 8 in the housing portion 2a. As described above, at this time, the bottle 6 is already filled with the contents, and the reversing portion 6e protrudes downward from the bottle bottom portion 6d. Thereafter, when the turntable 2 further rotates and the rotation angle θ (conveying position) of the storage portion 2a reaches θ1, the pressing member 9c of the storage portion 2a is lowered, and the bottle 6 on the mounting table 8 is pushed down. It is done. Accordingly, the bottle 6 is held by the periphery of the mounting table 8 that has been depressed from the upper surface of the turntable 2 and the holding arm 9d.

  When the rotation angle θ of the housing portion 2a reaches θ2, the guide rail 11a gradually starts to rise. As a result, the base 14 and the push-up punch 10 are displaced upward in conjunction with the roller 11b engaged with the guide rail 11a, and a preparation state for activation processing is obtained. In this preparation state, the tip of the push-up punch 10 rises to the vicinity of the reversing part 6e, but does not reach the push-up of the reversing part 6e.

  When the rotation angle θ of the housing portion 2a reaches θ3, a defect inspection (bottom inspection) before activation is performed using the defect detection sensor 5a provided at the position θ3. As shown in FIG. 6, in the normal state in which the reversing part 6 e of the bottle 6 is appropriately projected, the push-up punch 10 that has come into contact with the reversing part 6 e descends against the urging force of the urging member 15, Push down one end 12b. As a result, the horizontal amplification lever 12 changes to a state of rising to the right. When the amplified lever 12 rises to the right, the other end 12c of the amplified lever 12 faces the defect detection sensor 5a. Thereby, the defect detection sensor 5a is turned on. When the defect detection sensor 5a is on, the determination result of the bottom inspection is good (normal). On the other hand, as shown in FIG. 7, in the abnormal state where the reversing part 6 e does not properly protrude (complete or incomplete depressed state), the push-up punch 10 is moved from the normal state by the biasing force of the biasing member 15. As a result, the amplification lever 12 remains in a state closer to the horizontal than the normal state. In this case, since the other end 12c of the amplification lever 12 does not face the defect detection sensor 5a, the defect detection sensor 5a is turned off. When the defect detection sensor 5a is off, the determination result of the bottom inspection is regarded as defective. As described above, by using the amplification lever 12, even if the primary displacement amount a1 on the one end 12b side is minute, the secondary displacement amount a2 on the other end 12c side to be detected by the defect detection sensor 5a is sufficiently large. growing. For example, when the lever length ratio is 1: 5, the primary displacement amount a1 of about 2 mm is amplified to the secondary displacement amount a2 of about 10 mm. By using the amplified secondary displacement amount a2 as a detection target, a bottom inspection before activation processing can be performed with high accuracy.

  Thereafter, the push-up punch 10 is raised by, for example, about 10 mm in the range from θ4 to θ5, and the push-up punch 10 is lowered by about several mm in the range from θ6 to θ7. Thereby, the activation process is performed, and the reversing part 6 e of the bottle 6 is pushed up by the push-up punch 10.

  Thereafter, when the rotation angle θ of the housing portion 2a reaches θ8, a defect inspection (reverse inspection) after activation is performed using the defect detection sensor 5b provided at the position θ8. As shown in FIG. 8, in a normal state in which the reversing part 6 e of the bottle 6 is appropriately depressed, the push-up punch 10 is raised by the urging force of the urging member 15, and the amplified lever 12 is leveled. In this case, since the other end 12c of the amplification lever 12 faces the defect detection sensor 5b, the defect detection sensor 5b is turned on. When the defect detection sensor 5b is on, the determination result is good (normal). On the other hand, as shown in FIG. 9, in the abnormal state where the reversing part 6 e is not properly depressed, the push-up punch 10 in contact with the reversing part 6 e descends against the urging force of the urging member 15, One end 12b of the amplification lever 12 is pushed down. As a result, the amplified lever 12 is in a state of rising to the right. In this case, since the other end 12c of the amplification lever 12 does not face the defect detection sensor 5b, the defect detection sensor 5b is turned off. When the defect detection sensor 5b is off, the determination result is determined to be defective. Similar to the above-described bottom inspection, by using the secondary displacement amount a2 amplified by the amplification lever 12 as a detection target, the reverse inspection after the activation processing can be accurately performed.

  When the rotation angle θ (conveying position) of the storage portion 2a reaches θ9, the pressing member 9c in the storage portion 2a rises, and the mounting table 8 returns to the raised position. Finally, when the storage portion 2a reaches the discharge position (θ = θout), the bottle 6 in the storage portion 2a is sent to the discharge turret 3c shown in FIG. 1, thereby completing a series of activation processes.

  Thus, according to the present embodiment, the defect detection sensors 5a and 5b for detecting the state defect of the reversing unit 6e are not provided individually for each push-up punch 10, but are shared by all the push-up punches 10, Each time the push-up punch 10 passes the predetermined transport positions θ3 and θ8, the lift position of the push-up punch 10 is detected each time. The detection timings of the defect detection sensors 5a and 5b are uniquely specified in terms of control on the assumption that the rotation speed of the turntable 2 and the interval between the accommodating portions 2a are known. Therefore, the defect detection by the defect detection sensors 5a and 5b can be continuously performed at the timing synchronized with the rotation of the turntable 2. By sharing the defect detection sensors 5a and 5b, the number of sensors and mechanical parts such as springs attached to the sensors and the number of signal lines connected to the sensors can be reduced, thereby simplifying the defect detection mechanism. it can. At the same time, it is possible to reduce labor for exchanging consumables, malfunctioning of the sensor, or adjustment of the sensor, so that maintainability can be improved.

  Further, according to the present embodiment, since the primary displacement amount a1 of the push-up punch 10 itself is amplified by the amplification lever 12, even if the displacement of the push-up punch 10 is very small, the defect detection sensors 5a and 5b can accurately detect it. be able to. Thereby, it is possible to accurately detect a defect of the reversing unit 6e without using an expensive sensor or without exerting more labor than necessary to adjust the sensor. In the case of paying attention to this effect, it is not essential to share the defect detection sensors 5a and 5b, and the sensor is provided for each storage portion (for each push-up punch) as described in the prior art. Can also be applied.

  In the above-described embodiment, the turntable 2 is used as the conveyance path. However, the present invention is not limited to this, and can be similarly applied to any conveyance path including a linear shape. .

  As described above, the defect detection mechanism according to the present invention is not limited to the bottle described above, and can be widely applied to containers of various shapes provided with a reversing unit.

DESCRIPTION OF SYMBOLS 1 Conveying device 2 Turntable 3 Loading mechanism 4 Discharging mechanism 5, 5a, 5b Defect detection sensor 6 Bottle 7 Container pushing-up device 8 Mounting table 9 Holding mechanism 10 Pushing punch 11 Lifting mechanism 12 Amplifying lever 13, 15, 17 Energizing member 14 Base 16 Slide rod

Claims (5)

In the container push-up device that pushes up the reversing part protruding outward from the bottom of the container and reverses it inside the container,
A plurality of mounting tables each of which moves on the transport path, on which each of the containers is mounted;
A plurality of push-up punches which are provided corresponding to each of the mounting tables and individually reverse the reversing part of the container mounted on the mounting table;
A lifting mechanism for lifting and lowering each of the push-up punches;
An urging member that urges each of the push-up punches upward to follow the ascending / descending position of the push-up punch to the shape of the reversing unit;
A defect detection sensor that is provided at a predetermined transport position in the transport path and detects the lift position of the push-up punch each time the push-up punch passes through the predetermined transport position ;
Possess an amplifying lever to amplify the displacement of the push-up punch,
The container push-up device , wherein the defect detection sensor detects a position where displacement is amplified by the amplification lever . In the container push-up device that pushes up the reversing part protruding outward from the bottom of the container and reverses it inside the container,
A rotatable turntable provided with a plurality of mounting tables in the circumferential direction on which the container is mounted;
A plurality of push-up punches which are provided corresponding to each of the mounting tables and individually reverse the reversing part of the container mounted on the mounting table;
A lifting mechanism for lifting and lowering each of the push-up punches;
An urging member that urges each of the push-up punches upward to follow the ascending / descending position of the push-up punch to the shape of the reversing unit;
A defect detection sensor that is provided at a predetermined transport position on the turntable and detects the lift position of the push-up punch each time the push-up punch passes through the predetermined transport position ;
Possess an amplifying lever to amplify the displacement of the push-up punch,
The container push-up device , wherein the defect detection sensor detects a position where displacement is amplified by the amplification lever . The amplification lever is provided corresponding to each of the mounting tables , and is a plurality of amplification levers that individually amplify the displacement of the push-up punch ,
The container pushing-up device according to claim 1, wherein the defect detection sensor detects a position where displacement is amplified by the amplification lever as the lift position.   4. The container push-up device according to claim 3, wherein the defect detection sensor is a non-contact sensor that detects whether or not a displacement is amplified by the amplification lever.   The said defect detection sensor is provided in at least one of the conveyance position before reversing the said inversion part, and the conveyance position after reversing the said inversion part, The any one of Claim 1 to 4 characterized by the above-mentioned. The container push-up device described in the above.

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