JP2007191166A - Capping apparatus and capping method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a capping apparatus and a capping method capable of preventing a roughly shaped cap to be fitted to a container mouth part from being obliquely capped. <P>SOLUTION: A connection part 27 for carrying a capped container 9 into a capping part 16 is arranged between a cap attaching part 17 for capping a cap 1 on a container mouth part and the capping part 16 to be threaded and fitted to a peripheral surface of the cap. The cap attaching unit comprises a plurality of cap loading units for holding and rotating a cap, a container feeding unit 20 for feeding the container to the position facing the cap loading units, and a cap carrying-in unit 19 for carrying a top plate part of the cap with the top plate part on the upper side in the cap loading units in a horizontal state. The cap loading unit comprises a capturing unit for sucking the top plate part of the carried-in cap, a cam means for relatively bringing the capturing unit and the carried-in container close to each other, and a valve means for applying the suction force to the capturing unit in a predetermined section from the cap carry-in position to the cap attaching position to the container mouth part. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  In the present invention, a threaded portion along the thread of the container mouth is provided on the peripheral surface of the cylindrical portion of a metal cap rough shape member (hereinafter also referred to as a cap) having an opening at one end that covers the container mouth. The present invention relates to a capping device and a capping method that perform molding and / or cuff molding.

  As a rough metal cap for a container, a bottomed cylindrical shape having one end opening provided with a top plate portion and a skirt portion hanging from the outer periphery thereof is widely known. A roll-on capping method is known as a method for attaching this kind of rough cap material to the container mouth. In this method, the container mouth is covered with a cap rough shape, and pressure is applied to the top surface of the cap rough shape to bring it into close contact with the open end of the container mouth. The thread forming roller is pressed against the peripheral surface of the skirt part of the container to form a threaded part that matches the thread of the container mouth part. Lock to the mouth. An example of a forming head in a capping device for performing such capping is described in Patent Document 1.

  The roll-on-capping method for forming a screw portion on the cap rough shape material after covering the cap rough shape material on the container mouth portion in this way is provided with a screw portion on the cap rough shape material in advance, and this is applied to the container mouth portion. Compared with a screw capping method for screwing into a container, this is an excellent method in that a screw shape suitable for the container mouth can be formed at all times and the working efficiency is high.

  Moreover, as shown in FIG. 11, a cap rough shape material 81 is supplied to a wide-mouthed container 80 such as a cup, a bottle, and a can, and the cap rough shape material supply device 82 for covering this is used. In the middle of transporting the filling container or the container 80 opened on the side opposite to the container opening, the rough cap 81 held at the tip of the chute 84 is taken out by hooking the container opening 83 on the skirt 85. This is known. However, if the skirt portion 85 of the rough cap member 81 is caught by the mouth portion 83 of the container 80 in the middle of conveyance, the container mouth portion 83 and the rough cap member 81 are not necessarily accurately centered and the rough cap member is not accurately centered. Since 81 is often inclined relative to the container opening 83, problems such as the cap rough shape 81 not being completely covered by the container opening 83 are likely to occur. In addition, a spring mechanism 86 is provided at the tip of the chute 84 to give resistance to the cap rough shape member 81 and prevent its free fall. Therefore, the container 80 may vibrate or tilt due to the take-out resistance force of the cap rough shape member 81, and the cap rough shape member 81 may be obliquely covered, or the contents in the container 80 may overflow. For this reason, instead of the configuration in which the skirt portion 85 of the cap rough shape member 81 is hooked and taken out by the container mouth portion 83, the cap rough shape material is provided so that the container mouth portion is covered with the cap rough shape material at the timing. An example of a profile supply device is described in Patent Document 2.

JP-A-1-99967 JP-A-8-253293

  However, in the crowning method in which the cap rough shape material is applied to the container mouth from the cap rough shape material chute used in the conventional cap rough shape material supply device, when the cap rough shape material is hooked and taken out from the chute, the resistance is reduced. In response, the container fluctuates and the vibration of the cap causes the cap rough shape to dance or to tilt and shift, so that the cap rough shape is easily covered with the container mouth. In such a case, when capping, the top plate portion of the cap rough shape material is pressed from above and the cap rough shape material is properly seated on the container mouth portion and tightened, but the wide mouth type (for example, In the case where the outer diameter of the container mouth portion is 35 mm or more), the oblique covering of the cap rough shape material may not be eliminated by simply pressing the cap rough shape material top plate portion, and it may be wound. . Therefore, in order not to cause such a problem, a complicated operation of adjusting the angle and height when supplying the rough cap member, the resistance of the spring attached to the tip of the chute, and the like is required.

  Recently, various types of container mouth portions have been proposed. For example, the tip of the container mouth portion is curled to flatten the curled side surface or the top plate, or to be thin and have strength. There is a shape of the container mouth portion narrowed by. Various types of liner shapes have been proposed, depending on whether the cap rough shape is for negative pressure or positive pressure. However, in the crowning method in which the cap rough shape material is covered from the cap rough shape material chute to the container mouth portion, the crown shape of the cap rough shape material becomes unstable due to the liner shape of the cap rough shape material, and the cap is attached in a slanted state. May be. As shown in FIG. 12, when the shape of the liner member 87 of the rough cap member 81 is a shape with the inner rib 88, the rib 88 and the curled portion 89 are normally fitted into the container mouth portion 83. Instead, a part of the rib 88 may ride on the top surface of the curled portion 89 of the container mouth portion 83. As shown in FIG. 12, when the top plate portion 81 </ b> A of the rough cap member 81 is pressed from above, a part of the rib 88 runs on the top surface of the curled portion 89 and is bent to the outside of the curled portion 89. In this state, the cap rough shape member 81 is tightened in a state where a part of the rib 88 is bitten in the container mouth portion 83, and the contact state between the top surface of the curled portion 89 and the rib 88 is all around. Sealing failure occurs due to non-uniformity.

  The present invention has been made in view of the above technical problems, and the object thereof is to stabilize the crowning of the rough cap material fitted into the container mouth, and to provide an oblique covering of the rough cap material. Capping of the rough cap material, which improves the tightening quality of the rough cap shape material, and ensures that the rough cap shape is crowned and tightened. It is to provide an apparatus and a capping method.

  In order to achieve the above-mentioned object, the invention according to claim 1 is directed to press the top plate portion against a metal cap rough profile placed on the container mouth, and form a roller on the cap rough profile peripheral surface. In the capping device that applies capping and attaches a cap to the container mouth portion, a cap rough shape crowning portion for covering the supplied container mouth portion with the cap rough shape material, and a cap rough shape of the container with the cap rough shape material crowned. A connection for carrying the cap-crowded container into the capping part via a connection turret between the capping part for pressing the molding roller against the circumferential surface of the profile and capping the container and attaching the rough cap to the container mouth. And the cap rough shape crowning portion includes a plurality of cap loading portions that absorb and hold the top plate portion of the rough cap shape material and revolve, A container supply section for supplying a container to the cap loading section; and a cap rough shape material carrying section for carrying the cap rough shape material into the container supply section from the horizontal direction with the top plate portion facing upward, The cap loading unit is configured to make the cap capturing unit that elastically contacts the top plate unit of the loaded cap rough shape member and adsorbs the rough cap shape member relative to the cap capturing unit and the loaded container. And a valve means for causing a suction force to act on the cap rough shape capturing part in a predetermined section from the loading position of the cap rough shape material to the container mouth portion. It is characterized by being.

  According to a second aspect of the present invention, in the first aspect of the present invention, the rough cap material crown portion moves upwardly toward the cap capturing portion through the lower end opening of the supplied container. The lifting means for elastically deforming the vicinity of the center of the top plate portion of the rough cap member is provided on the rotary table side for revolving the container, and the container is a container having a lower end opening. Is a capping device.

  Further, in the invention of claim 3, after a metal cap is preliminarily attached to the container mouth portion, a molding roll is circulated around the peripheral surface of the cap placed on the container mouth portion and wound around the container mouth portion. In the capping method of tightening, when the cap is attached to the container mouth, the cap top plate is sucked and held, and before the sealing liner member of the cap contacts the container mouth, the peripheral edge of the cap The cap top plate portion that is sucked and held with the portion as a fulcrum is elastically deformed upward to displace the inner rib of the liner member of the cap toward the center of the cap, and the cap is attached to the container mouth. Thereafter, the suction holding of the cap is released to return the inner rib.

  According to the first aspect of the present invention, since the rough cap material is held by adsorbing the top plate portion of the rough cap material, the top plate portion of the rough cap material can be held in a horizontal state, and in this state the container Since it is crowned at the mouth, the cap rough shape can be crowned at the container mouth without causing defects such as so-called oblique covering. Further, the conventional capping mechanism can be used as it is for the capping unit, and the equipment cost can be reduced.

  According to the invention of claim 2, the central portion of the top plate portion is elastically deformed upward by suction, and the upward elastic deformation amount is adjusted by the elevating means. Thus, when the liner portion is provided on the inner side of the top plate portion and the liner portion includes an inner rib inserted along the inner peripheral edge of the container mouth portion, the inner rib is formed by the above deformation of the top plate portion. The cap is deformed in the center direction, and the inner diameter of the tip is reduced. As a result, the rough cap material can be easily attached to the container mouth, and the rough cap material can be stably wound in the capping portion of the next process.

  Furthermore, according to the invention of claim 3, since the top plate portion is sucked and held by the cap, in this case, the top plate portion is sucked by using the peripheral portion of the top plate portion as a fulcrum. The part side is elastically deformed upward. Along with this, the tip of the inner rib of the liner member provided on the inner periphery of the top plate portion is displaced toward the center of the top plate portion. Since the cap is put on the container mouth in this state, the inner rib of the liner member is folded outside the top of the container mouth and is put on without being bitten by the container mouth. After that, when the suction is released, the inner rib returns and adheres closely to the container mouth portion, so that a poorly crowned material such as the cap mouthpiece is crowned while the container mouth portion bites the inner rib. Can be prevented.

  Hereinafter, the present invention will be described with reference to specific examples. First, the container which is the object of the present invention is a so-called resealable (resealable) metal container in which a cap is attached to the container mouth with a screw. The metal plate as the material includes an aluminum plate, aluminum An alloy plate, a surface-treated steel plate such as tin-free steel, a tin plate, a chrome-plated steel plate, an aluminum-plated steel plate, a metal-plated steel plate such as a nickel-plated steel plate, and other various alloy-plated steel plates can be used. Moreover, the raw material which coat | covered the surface which should become the can inner surface side of a metal plate with a thermoplastic resin can also be used. This can body is a three-piece can type reseal can consisting of a can body, a cap and a bottom lid, or a can, re-drawn can, stretch can, squeezed iron can, impact can, etc. It is possible to make a two-piece can type reseal can in which a cap is attached to a seamless can body formed by a screw. Alternatively, the top dome is molded at the bottom of the seamless can body, the neck and shoulders are molded, the cap is wrapped around the screw formed on the mouth and neck, and the neck is at the opening at the bottom of the can body Other containers such as bottle-shaped cans that are subjected to in processing and flange processing and whose bottom lid is wound can be used.

  On the other hand, the cap is a metal bottomed cylindrical body having a top plate portion and a skirt portion, and is covered with a container mouth portion from the opening side and roll-on molded (capped) by a capping device described later, and the cap A thread groove is formed in the cylindrical portion of the skirt portion, and the skirt hem portion (opening side end portion) is skirt-tightened to form a so-called pill fur proof function.

  The material of the cap is not particularly limited. For example, a metal material such as an aluminum alloy plate coated with an epoxy-phenol resin in which an olefin resin powder is dispersed on the inner surface side is used. As the liner material, for example, a conventionally known resin material such as a blend material of low-density polyethylene and an ethylene-propylene rubber-like copolymer, a blend material of polypropylene and a styrene elastomer, or a polyester elastomer is used. .

  An example of this is shown in FIG. 9, and FIG. 9 shows a state before roll-on molding, and the rough cap 1 is suspended downward from the periphery of the top plate 2 via the corner 3. A portion where the screw portion is formed is left as a cylindrical portion 5 in the skirt portion 4 to be formed, and a pilfer proof band 7 is provided at the bottom of the cylindrical portion 5 so as to be separated by the weakening portion 6. Is formed. A sealing resin liner member 8 is integrally attached to the inner surface side of the top plate portion 2 of the cap 1.

  On the other hand, as shown in FIG. 10, the can container 9 to which the cap 1 is attached is a can container 9 having a container mouth portion 10 with a screw that can be resealed (re-sealed) by the cap 1, The end portion of the container mouth portion 10 of the can container 9 manufactured from the above is formed with a curled portion 11 having a circular cross-section or a multi-layered folded structure at the upper end, and expands downward below the curled portion 11. A male screw portion 13 that is a screw thread for screwing the cap 1 is formed through the inclined wall 12, and a convex bead 14 is formed below the male screw portion 13. An annular bead 15 that is recessed inward in the radial direction is formed in the lower portion. Therefore, the lower end portion of the pilfer proof band 7 is engaged with the inclined surface that is a boundary portion between the convex bead 14 and the annular bead 15. The can container 9 may be a pre-filled container filled with the contents or a pre-filled container opened on the side opposite to the container mouth. A glass container may also be used.

  By the way, when the cap 1 in which the screw part shown in FIG. 9 is not formed is attached to the container mouth part 10 shown in FIG. 10, it will be described later in a state where the cap 1 is put on the container mouth part 10 from above. By using such a capping device, the container mouth portion 10 is placed on the cylindrical portion 5 of the skirt portion 4 of the cap 1 by screw forming with a screw forming roller while applying a stoppering pressure to the top plate portion 2 of the cap 1. A female screw portion is formed so as to match the male screw portion 13, and the lower end portion of the pilfer proof band 7 formed at the skirt portion of the skirt portion 4 of the cap 1 is made to protrude from the container mouth portion 10 by a skirt fastening roller. The bottom end of the bead 14 is tightened so as to be engaged. When the pilfer proof function is performed by other means, the cap does not have the pilfer proof band 7. Therefore, when capping such a cap, only the screw forming roller is provided. It becomes.

  A capping device according to the present invention includes a capping portion 16 that performs screw forming and skirt fastening forming of the female screw portion and a cap rough shape crowning portion that covers the cap rough shape material 1 over the container mouth portion 10 as a preceding process ( (Hereinafter referred to as a crowned portion) 17. FIG. 1 schematically shows the state of arrangement, and the crown portion 17 includes a rotary table 18 and a guide frame 18A for placing the can container 9 on the upper surface of the outer peripheral portion at equal intervals. A cap carry-in mechanism 19 and a container carry-in mechanism 20 are disposed on the outer peripheral side of the turntable 18 in the crown portion 17. The cap carry-in mechanism 19 includes an infeed turret 21 and a slider 22 that feeds the cap 1 with the opening facing downward and the top plate 2 facing upward toward the infeed turret 21. The infeed turret 21 is formed with pocket portions 21A that are accommodated one by one with the top plate portion 2 of the cap 1 in a substantially horizontal state, and the locus of the pocket portions 21A corresponds to the rotary table 18. Is in contact with the trajectory of the mounting portion of the can container 9. More specifically, the infeed turret 21 is disposed so that the cap 1 accommodated in the pocket portion 21 </ b> A passes above the can container 9 placed on the rotary table 18.

  The slider 22 is arranged so as to carry the cap 1 at a position almost opposite to the crown 17 with the infeed turret 21 in between. And the guide member 23 is arrange | positioned along the rotation direction of the infeed turret 21 in the range from the front-end | tip part of the slider 22 to the vicinity of the position on the outer peripheral part of the turntable 18 among the outer peripheral sides of the infeed turret 21. ing. The guide member 23 has an outer periphery of the rotating plate so as to prevent the cap 1 from being removed from the guide plate 23A and the pocket portion 21A on which the cap 1 held in the pocket portion 21A is placed in a horizontal state. Guide frames 23B and 23C arranged in an arc shape on the side.

  In FIG. 1, the rotary table 18 rotates in the clockwise direction, and a container carry-in mechanism 20 is disposed on the upstream side of the cap carry-in mechanism 19. The container carry-in mechanism 20 includes an infeed turret 24 and a screw feeder 25 that feeds the can container 9 toward the infeed turret 24. The infeed turret 24 is a rotating plate in which pocket portions 24A for accommodating the can containers 9 one by one are formed around the periphery at equal intervals, and the locus of the pocket portions 24A corresponds to the placement of the can containers 9 on the rotary table 18. It is in contact with the trajectory of the table.

  The screw feeder 25 is arranged in a tangential direction of the infeed turret 24 at a predetermined location on the outer peripheral side of the infeed turret 24 and upstream of the infeed turret 24 from the delivery position of the can container 9 with respect to the crown portion 17. Yes. Further, on the outer peripheral side of the infeed turret 24, the range from the tip of the screw feeder 25 to the vicinity of the loading position of the can container 9 with respect to the rotary table 18 of the crowning portion 17 is along the rotation direction of the infeed turret 24. A guide member 26 is arranged. The guide member 26 has a guide plate (not shown) for placing the can container 9 held in the pocket portion 24A and the outer peripheral side of the infeed turret 24 so as to prevent the can container 9 from coming off the pocket portion 24A. And a guide frame 26A arranged in an arc shape.

  On the other hand, a connection portion 27 is disposed between the crowning portion 17 and the capping portion 16 for transferring the can container 9 with the cap rough profile 1 crowned from the crowning portion 17 to the capping portion 16. Yes. The connection portion 27 includes a turret 28 in which a plurality of pocket portions for accommodating the can containers 9 one by one are provided around the periphery, and the crown portion 17 in a state where the can containers 9 are held in the pocket portions. To the capping unit 16.

  The capping portion 16 is formed by drawing the corner portion 3 of the cap 1 attached to the container mouth portion 10, screw forming processing using a screw forming roll (not shown), and pilling using a hem fastening roll (not shown). This is for performing the bottom fastening of the lower end portion of the furproof band 7. This can be configured by a conventionally known capping device, for example, a device described in JP-A-2005-145522.

  Next, the configuration of the crown portion 17 will be described. 2 shows an overall configuration, FIG. 3 shows a cap loading mechanism Lc including a push pad 53 corresponding to the cap capturing portion of the present invention, and FIG. 4 shows an anvil 34 together. A fixed housing 30 fixed on a machine base portion (not shown) is provided, and a rotating shaft 31 protrudes upward and is rotatably held therein. A flange 31A is formed at a portion of the rotary shaft 31 protruding from the fixed housing 30, and the rotary table 18 described above is integrally attached thereto. Around the turntable 18, a plurality of holding claws 32 that hold the can container 9 in an upright state are provided at regular intervals in the circumferential direction of the turntable 18. The place where the holding claw 32 is provided is a mounting portion on which the can container 9 loaded by the container loading mechanism 20 is placed, and below that is an air cylinder 33 corresponding to the lifting means in the present invention. It is mounted upwards. The air cylinder 33 is provided with an anvil 34 that moves up and down together with a piston (not shown). When the can container 9 is a container without a bottom cover, the anvil 34 is extended in the process of attaching the cap 1 to the cap. 1 top plate 2 is slightly pushed up from the lower side.

  A rotating frame 35 positioned on the upper side of the rotating table 18 is integrally attached to the rotating shaft 31. A plurality of guide sleeves 36 and cap pockets 35 </ b> A are provided around the rotary frame 35 and immediately above the placement portion of the can container 9 on the rotary table 18 corresponding to the placement portion. Inside the guide sleeve 36 is inserted an elevating rod 37 that moves up and down toward the mounting portion, that is, toward the can container 9 on the mounting portion. The elevating rod 37 can move up and down non-rotatingly with respect to the guide sleeve 36, for example, via a ball spline bearing. Further, the upper end portion protrudes upward from the guide sleeve 36 and is attached to the bracket 38 in a suspended state at the upper end portion.

  On the other hand, a shaft end 39 extends above the rotating frame 35 on the same axis as the rotating shaft 31, and a cylindrical member 40 is concentrically attached to the shaft end 39 via a bearing 39A. It is fixed to a machine base (not shown). An upper outer peripheral surface of the cylindrical member 40 is located near the bracket 38, and a cam groove 42 constituting a part of the cam mechanism 41 is formed on the entire outer peripheral surface. A cam follower 43 that engages with the cam groove 42 and moves in the circumferential direction and the vertical direction along the cam groove is attached to the bracket 38. In other words, the cam mechanism 41 is configured to move up and down in the process in which the elevating rod 37 pivots around the rotary shaft 31 together with the rotary shaft 31 and the rotary frame 35.

  A through hole 44 is formed along the central axis of the lift rod 37, and a hose 45 is connected to the upper end of the through hole 44. The other end of the hose 45 is connected to the rotating frame 35 and to a relay port 46 provided for each lifting rod 37. Further, the rotary table 18 is formed with a vent hole 47 penetrating in the vertical direction for each lifting rod 37, and the vent hole 47 and the relay port 46 are connected one-on-one.

  A slide ring 48 is attached to the lower surface of the rotary table 18 at a position corresponding to the vent hole 47, and the vent hole 47 is open to the lower surface of the slide ring 48. On the other hand, a fixed ring 49 slidably contacting the lower surface of the slide ring 48 is attached to the fixed housing 30 and pressed against the lower surface of the slide ring 48 by an elastic member (not shown) such as a coil spring. A groove 50 is formed on the upper surface side of the fixing ring 49 over a predetermined range in the circumferential direction, and a suction port 51 is formed so as to communicate with the groove 50. A suction source such as a vacuum pump (not shown) is connected to the suction port 51. Accordingly, in the state in which the ventilation hole 47 on the rotary table 18 side and the groove 50 are in communication with each other, a suction action is generated through the through hole 44 of the lifting rod 37, and the rotary table 18 is further rotated to form the ventilation hole 47. By removing from the groove 50, the suction action is stopped and the atmosphere is released. That is, the disc valve mechanism 52 is formed here. The opening / closing timing of the disc valve mechanism 52 and the configuration of the cam mechanism 42 will be described later together with the operation thereof.

  A push pad 53 that holds the cap 1 by adsorbing the top plate 2 of the cap 1 is attached to the lower end of the lifting rod 37. The push pad 53 includes a nozzle member 54 that is fixed to the lower end portion of the elevating rod 37, and a sleeve 55 that is fitted to the outer peripheral side of the nozzle member 54 so as to move up and down by a predetermined dimension. The nozzle member 54 is formed with a suction port 56 through which a through hole 44 formed in the elevating rod 37 communicates.

  A sleeve 55 is attached to the nozzle member 54 with a stop ring 57 attached to the nozzle member 54 so that the sleeve 55 is prevented from coming off, and an elastic body that presses the sleeve 55 toward the stop ring 57 side, that is, a compression spring 58 is provided. It is disposed between the member 54 and the sleeve 55. And the lower end part 55A of the sleeve 55 has a shape in which the outer peripheral part protrudes, and the corner part 3 of the cap 1 is pressed by this outer peripheral part. In addition, as shown in FIG. 4, you may provide the push pin 60 pressed with the spring 59 so that it may protrude below in several places of the outer peripheral part of the sleeve 55. As shown in FIG.

  Next, the operation of the above-described capping device, that is, the method of the present invention will be described with a focus on the operation of the above-described crowned portion 17. FIG. 5 shows a rotation circle of the mounting portion on the rotary table 18, and a line connecting the rotation center of the rotary table 18 and the rotation center of the infeed turret 21 in the cap carry-in mechanism 19 is The contact position (position indicated by N in FIG. 5) is the carry-in position of the cap 1. Similarly, the position where the line connecting the rotation center of the turntable 18 and the rotation center of the infeed turret 24 in the container carry-in mechanism 20 and the rotation circle contact (position indicated by M in FIG. 5) is the can container 9. This is the loading position. On the other hand, the position where the line connecting the rotation center of the turntable 18 and the rotation center of the turret 28 in the connection portion 27 and the rotation circle (position indicated by P in FIG. 5) is completed. It becomes a position to deliver the finished can container 9 from the crowning part 17 to the connection part 27. FIG. 6 shows the cam diagram corresponding to each of these positions and the on / off of suction (vacuum) by the valve mechanism 52.

  The can container 9 is placed on the mounting portion of the rotary table 18 at the loading position indicated by M in FIG. 5, and is rotated clockwise together with the rotary table 18 as shown in FIG. 5. The rotation of the rotary table 18 and the loading of the cap 1 are synchronized, and when the can container 9 moves to the cap loading position (position indicated by N in FIG. 5), the cap extends to the upper side of the can container 9. The cap 1 is fed onto the guide member 23 of the carry-in mechanism 19 so as to coincide with the same axis as the can container 9. At this time, the push pad 53 is pulled up to the upper limit position by the cam mechanism 41 and is separated upward from the top plate portion 2 of the cap 1. Here, as shown in FIG. 1, when the supply of the can container 9 is stopped, the proximity sensor 25A detects the presence or absence of the can, and the slider 22 outlet portion of the cap carry-in mechanism 19 is detected by an electromagnetic valve and an air cylinder (not shown). The rotation of the stopper wheel 22A attached to is stopped, and the supply of the cap to the corresponding pocket 21A is stopped.

  When the push pad 53 together with the rotary table 18 rotates slightly from the cap loading position and reaches the position indicated by P1 in FIG. 5, the push pad 53 starts to move down together with the lifting rod 37 by the cam mechanism 41 described above. . This state is shown as P1 in FIG. When the guide member 23 is rotated to near the end of the guide member 23 and reaches the position indicated by P <b> 2 in FIG. 5, the push pad 53 substantially contacts the top plate portion 2 of the cap 1 mounted on the guide member 23. At the same time, the vent hole 47 on the rotary table 18 communicates with the groove 50 in the valve mechanism 52 described above, and suction (vacuum) is started. As a result, the top plate portion 2 of the cap 1 is attracted by the push pad 53, and the cap 1 is sucked and held by the push pad 53. This state is shown as P2 in FIG.

  The height of the push pad 53 is kept constant until the cap 1 comes off the guide member 23 (position indicated by P3 in FIG. 5). This state is shown as P3 in FIG. Then it is lowered again. As described above, since the can container 9 is disposed immediately below the push pad 53 and the container opening 10 and the cap 1 are held on substantially the same axis, the push pad 53 is lowered by the cam mechanism 41. As a result, the cap 1 approaches the container mouth 10 and the coronation is started. This state is shown as P4 in FIG.

  When the push pad 53 is further lowered, the cap 1 is fitted more deeply into the container mouth portion 10, and the liner member 8 provided on the inner surface of the top plate portion 2 contacts the curled portion 11 of the container mouth portion 10. . The state in the process is shown as P5 in FIG. When the push pad 53 is lowered to the lower limit position by the cam mechanism 41, the sleeve 55 constituting the push pad 53 receives a resistance force for attaching the cap 1 so that the compression spring 58 is Compressed and pushed up relatively. In other words, an action of pushing the cap 1 against the container mouth 10 by the elastic force of the compression spring 58 occurs. In this case, the elastic force of the compression spring 58 is adjusted so that the cap 1 does not deform excessively. Thus, the cap 1 is finished wearing, and the suction of the cap 1 by the push pad 53 is released (vacuum OFF). This state is shown as P6 in FIG. This is the state at the position indicated by P6 in FIGS.

  After the suction of the cap 1 is released, the push pad 53 is held at the lower limit position for a short time until the position indicated by P6 in FIG. 5 is reached. This is because the cap 1 can be surely pushed by the compression spring 58. Thereafter, the push pad 53 is pulled upward by the action of the cam mechanism 41 and returns to the upper limit position. The state of the process is shown as P7 in FIG. Then, the push pad 53 reaches the upper limit position via the position indicated by P7 in FIGS. 5 and 6, and returns to the position indicated by the above-described symbol P1.

  In the middle of the process, the can container 9 in which the cap 1 is completely attached is delivered to the connection portion 27 at the delivery position indicated by P in FIG. Further, the can container 9 is carried into the rotary table 18 from the container carry-in mechanism 20 at the carry-in position indicated by M in FIG.

  As described above, the sleeve 55 constituting the push pad 53 has a shape in which the outer periphery of the lower end protrudes, and the tip end (lower end) of the nozzle member 54 is slightly above the lower end of the sleeve 55. Have retreated. Therefore, when the push pad 53 adsorbs the top plate portion 2 of the cap 1, an action of raising the central portion relatively and bulging upward (elastic deformation) occurs. In particular, when the anvil 34 described above is provided, as shown in FIG. 4, the anvil 34 is protruded upward and the top plate portion 2 is pushed up from the lower side, so that the central portion of the top plate portion 2 is surely secured. It can be bulged and the amount of bulging can be adjusted.

  When the top plate portion 2 is elastically deformed as described above, the liner member 8 provided on the inner surface thereof is also deformed. This state is shown in FIG. The liner member 8 is provided from the inner surface of the top plate portion 2 to the inner surface of the corner portion 3, and further includes an inner rib 8a and an outer rib 8b. The inner rib 8a is an outer rib in order to improve sealing performance. The curl portion 11 of the container mouth portion 10 is inserted between the ribs 8a and 8b. The leading end side of the inner rib 8a is displaced in the center direction of the cap 1 with the bulging deformation of the top plate portion 2, and the outer rib 8b is not displaced so much, so that the interval between the inner rib 8a and the outer rib 8b is increased. Then, when the cap 1 is completely attached, the deformation of the top plate portion 2 is released, so that the inner rib 8a returns to the original position and the liner member 8 returns to the inner peripheral surface of the curled portion 11 as shown in FIG. Close contact with. Therefore, the curled portion 11 can be easily inserted between the ribs 8a and 8b when the cap is attached, and the inner rib 8a rides on the top end portion of the curled portion 11 and is caught by the top end portion of the curled portion 11 It is possible to avoid a poorly tightened state that is crowned by.

  Therefore, according to the above-mentioned capping device according to the present invention, since the top plate portion 2 of the cap 1 is held and moved in a horizontal state, the cap 1 is crowned on the container mouth portion 10. The so-called oblique covering can be prevented. In addition, a connection unit 27 (rotary conveyance mechanism) that receives the can container 9 having the cap 1 attached thereto from the crowning part 17 and delivers it to the capping part 16 is disposed between the crowning part 17 and the capping part 16. Therefore, the crown portion 17 does not interfere with equipment such as a capping head forming roll (not shown) in the capping portion 16. Therefore, it can be set as the structure which adsorb | sucks the top-plate part 2 of the cap 1 widely. Also, when targeting a wide-mouth cap, the wide-mouth cap has a larger diameter than the height and is stable when placed on the guide plate and transported in the horizontal direction. Therefore, it is possible to carry the sheet, and therefore, it is possible to achieve an effect that it is effective for increasing the capping speed. In addition, it is possible to provide a reliable cap crowning method without modifying the capper portion.

  Further, when sucking and holding the top plate portion 2 of the cap 1, the top portion 2 is swollen upward by sucking the central portion of the top plate portion 2 while supporting the peripheral portion of the cap 1. The tip of the inner rib 8a can be elastically displaced toward the center of the cap 1. As a result, even when the outer diameter of the inner rib 8a is larger than the inner diameter of the container opening 10 and the liner shape is difficult to fit, the inner rib 8a can be prevented from being bitten when the cap 1 is put on. . Thereafter, the suction is released and the tip of the inner rib 8a can be returned to the original position.

  That is, when the liner shape has a shape or outer diameter that is difficult to insert into the container mouth portion 10 and has the inner rib 8a that is relatively tightly fitted, the inner rib 8a has a rib length of 2 mm or more. Even if the shape of the curled portion 11 of the container mouth portion 10 is distorted, the inner rib 8a is made to be smaller by reducing the outer diameter of the distal end portion of the inner rib 8a. Overcoming the top end portion and the outer peripheral side of (curl portion 11), as a result, it is possible to prevent a situation where the curled portion is tightened in a state of being caught.

  Further, the top plate portion of the rough cap material can be structured to be widely adsorbed by the cap capturing portion such as a push pad. Thereby, even in the case of a wide-mouthed cap, it can be stably carried in and attached horizontally, and it is advantageous for speeding up the capping operation.

  In addition, when the number of heads of the capping unit 16 and the number of push pads 53 of the crowning unit 17 are made the same, a manufacturing history display corresponding to the capping head number of the capping process is given to the top plate unit 2 by the anvil 34. It is also possible.

  Note that the present invention is not limited to the above specific example, and the cam means in the present invention is only required to have a function of relatively bringing the cap capturing portion and the container close to each other. Instead of a configuration in which the cap capturing portion corresponding to the pad 53 is raised and lowered, a configuration in which the container is raised and lowered may be used.

  In the present embodiment, a cap that is likely to be obliquely covered when it is crowned on the container mouth, particularly a wide-mouth type cap (of the container mouth that is prone to biting of the inner rib when crowned with an oblique covering). Although an example that is advantageous when capping a cap that is applied to an outer diameter of 35 mm or more is shown, it is not limited to a wide-mouth type cap having a liner member with an inner rib, and it is oblique even without an inner rib It can also be applied to caps that are likely to be covered and caps having a small outer diameter (for example, caps called diameters 33 and 28) that have little swelling effect on the cap top plate, and can prevent miscapping due to oblique covering.

  Further, in the present embodiment, the capping for forming the screw part and the skirt fastening is illustrated, but the present invention is not limited to this, and the cap without the pilfer proof band, that is, only the screw part without performing the skirt fastening. It can also be applied to capping for roll-on molding.

  Furthermore, when the cap is tightened with a plurality of capping devices, that is, when the skirt is formed and then the screw is formed with another capping device, or the screw is formed and then the skirt is formed with another capping device. In any case, the present invention can be applied to the first capping device in which the cap is put on the container mouth portion.

FIG. 3 is a layout view showing an arrangement of a cap rough shape crowning portion, an infeed portion, a capping portion, and the like in the capping device according to the present invention. It is sectional drawing which shows the whole structure of an example of the cap rough-shaped material crown | attachment part. It is sectional drawing which shows a part of the cap rough-shaped material crown | attachment part. It is sectional drawing which shows the state which has pushed up the top-plate part of the cap adsorb | sucked with the push pad with an anvil. It is a figure which shows each position on the turntable rotation circle in a cap rough profile crowning part. It is a cam diagram which wrote together on and off of adsorption | suction. It is a figure which abbreviate | omits some guide-related members and shows the state in each process until it adsorb | sucks and caps a cap. It is a fragmentary sectional view which shows the state (a) in which the inner rib of a liner member is elastically deformed, and the state (b) in which the deformed inner rib returned. It is a partial cross section side view shown partially in a cross section about an example of a metal cap to which the present invention is applied. It is a partial cross section side view shown in a section cut away partially about an example of a container main part (near a container mouth part) to which the present invention is applied. It is a figure of the cap chute which shows a prior art example. It is explanatory drawing which shows the state which was tightened and became the crowning defect.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Rough cap material (cap), 2 ... Top plate part, 8 ... Resin liner member, 9 ... Can container, 10 ... Container mouth part, 16 ... Capping part, 17 ... Rough cap material crown part (crown) 19) Cap carry-in mechanism, 20 ... Container carry-in mechanism, 34 ... Anvil, 36 ... Guide sleeve, 37 ... Lifting rod, 41 ... Cam mechanism, 44 ... Through-hole, 52 ... Valve mechanism, 53 ... Push pad, Lc: Cap loading part.

Claims (3)

In a capping device that presses the top plate against a metal cap rough profile placed on the container mouth, presses a molding roller against the circumferential surface of the cap rough, capping, and attaches the cap to the container mouth ,
A cap rough shape crowning portion that covers the supplied container mouth portion with a cap rough shape material, and a cap is formed by pressing a forming roller against the peripheral surface of the cap rough shape material of the container with the cap rough shape crowned, and the container mouth portion. In the middle of the capping portion for mounting the cap rough shape material to, a connection portion for carrying the cap-attached container into the capping portion via a connection turret is disposed,
The cap rough shape crowning portion includes a plurality of cap loading portions that absorb and hold the top plate portion of the rough cap shape material, and a container supply portion that supplies a container to the cap loading portion, The container supply section includes a cap rough shape material carrying section for horizontally loading a cap rough shape material with the opening on the lower side and the top plate portion on the upper side,
The cap loading unit is configured to make the cap capturing unit that elastically contacts the top plate portion of the loaded cap rough shape member and sucks the cap rough shape member relative to the cap capturing unit and the loaded container. And a valve means for causing a suction force to act on the cap rough shape capturing part in a predetermined section from the loading position of the cap rough shape material to the container mouth portion. A capping device characterized by that.   The cap rough shape crowning portion passes through the lower end opening of the supplied container and moves upward toward the cap capturing portion, and elastically moves around the center of the top plate portion of the cap rough shape material. 2. The capping device according to claim 1, wherein an elevating means for deforming upward is provided on a rotary table side for revolving the container, and the container is a container having a lower end opening. In a capping method in which a metal cap is pre-attached to the container mouth portion, and then a forming roll is wound around the peripheral surface of the cap covered on the container mouth portion and the container mouth portion is wound.
When the cap is attached to the container mouth portion, the cap top plate portion is sucked and held, and before the sealing liner member of the cap contacts the container mouth portion, the cap peripheral portion is sucked and held as a fulcrum. The cap top plate is elastically deformed upward to displace the inner rib of the cap liner member toward the center of the cap, and the cap is attached to the container mouth, and then the cap is held by suction. The capping method is characterized by releasing and returning the inner rib.

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