JP4756183B2 - A method of tightening the bottom plate (top plate) around the NC servo seamer and rectangular cube-shaped can body - Google Patents

Description

The present invention includes an NC servo seamer that winds a bottom plate or a top plate on a square can, an elliptical can, a deformed can, etc. other than a round can, and a winding that tightens a bottom plate (top plate) on a rectangular cube-shaped can body Regarding the method .

  Conventionally, as a device that joins the bottom plate and top plate to the can body, a seamer that covers the can body with the bottom plate and top plate and sandwiches it with a lifter and a chuck, and winds the can body, bottom plate and top plate with a seaming roll ( A tightening device) is known.

  For example, Patent Document 1 discloses that a can body and a lid that rotate together with a chuck are wound by a first winding roll and a second winding roll, and the first winding roll and the second winding clamp are described. The roll is gradually pushed in the direction of the can body by a rotating cam. Patent Document 2 describes a can body that does not rotate, a first seaming roll that rotates around a lid, and a second seaming roll that is wound around, and the first seaming roll The second seaming roll moves on the fixed winding cam surface and is gradually pushed in the can body direction.

  Furthermore, Patent Document 3 discloses that a circular can body and a lid can be moved by moving a first roll and a second roll by individual servo motors while a lifter and a chuck are driven synchronously at the same rotation speed by a single servo motor. The first roll and the second roll are moved based on the cam curve data of the virtual cam input to the control device.

JP-A-6-47469 JP-A-8-168837 JP-A-2005-111582

  However, in Patent Documents 1 and 2, since the first and second seaming rolls are driven by the cam mechanism, the movement of the seaming rolls in the direction of the can body during the winding process is fixed. Advanced techniques are required to fine-tune the movement movement while adapting to differences in product shape and material changes. Furthermore, since the seaming roll is gradually pushed toward the can body in the tightening process, there is a case where the seaming roll is inclined and may not be entrained in the middle. There was a risk that it would not be done or wrinkled. For this reason, the malfunction which cannot wind up the can which has sealing performance will arise.

  In particular, when the shape of the can to be tightened is a rectangular can, an elliptical can, or a deformed can, the first seaming roll or the second seaming roll has a structure in which the distance varies from the center of the can depending on the edge position of the can. Even if the final winding of each roll is adjusted uniformly, it is very difficult to obtain the processing conditions during the winding process.

  In Patent Document 3, the round can is tightened by moving a first roll and a second roll, which are the first seaming roll and the second seaming roll, by a servo motor. It is based on a curve. However, since the present invention is intended for round cans, there has been a problem that further technology is required to perform a winding process for square cans and deformed cans having straight and circular portions.

  Therefore, the present invention has been made in view of the above-mentioned problems, and in a square can, an elliptic can, and a deformed can, the bottom plate and the top plate can be uniformly and ideally wound around the entire circumference. An object is to provide an NC servo seamer.

To achieve the above object, together with NC servo seamer of the present invention is the NC servo seamer for fastening machining up the bottom plate and the top plate to the opening of the oval can body made from a corner can barrel or oval consisting quadrangle or the like , a rotatable lifter table for placing said can body which covered the bottom plate or the top plate, a lifter mechanism for moving the lifter table in the vertical direction, the bottom plate or the top plate disposed above the lifter table A chuck that supports the can body between a lifter table and a chuck rotating servo motor that rotates the chuck at a rotational speed corresponding to a rotation angle about the axis of the can body, A first seaming roll and a second seaming roll which wind up the can body and the bottom plate or the top plate; and the first seaming roll and the second seaming roll A first seaming roll electric actuator and a second seaming roll electric actuator that move a roll in the axial direction of the can cylinder in correspondence with a rotation angle about the axis of the can cylinder, and the chuck rotation In an NC servo seamer composed of a servo motor and a drive control panel of the electric actuators for the first and second seaming rolls ,
The chuck is configured such that its rotational speed is large at an edge position close to the axis of the can body supported and small at a far edge position, and the chuck includes a knockout cylinder. .

The winding method of the present invention is an NC servo seamer that winds a bottom plate or a top plate around an opening of a rectangular can body made of a square or the like or an elliptic can body made of an ellipse , and the bottom plate or the top plate. A rotatable lifter table for placing the can body covered with a cover, a lifter mechanism for moving the lifter table in the vertical direction, and the can body being disposed above the lifter table via the bottom plate or the top plate. A chuck supported between the lifter table, a servo motor for rotating the chuck corresponding to a rotation angle centered on the axis of the can body, and rotating the chuck at a rotation speed, the can body and the bottom plate Alternatively, the first seaming roll and the second seaming roll that wind up the top plate, and the first seaming roll and the second seaming roll are connected to the axis of the can body. A first seaming roll electric actuator and a second seaming roll electric actuator that move in the axial direction of the can body in accordance with a rotation angle as a center, the chuck rotation servomotor, and the first and second electric motors. In an NC servo seamer configured with a drive control panel of an electric actuator for seaming rolls , the chuck is configured such that its rotational speed is large at an edge position close to the shaft center of the supported can body and small at a remote edge position. At the same time, the chuck is equipped with a knockout cylinder, and an NC servo seamer is used to place a rectangular plate-shaped can body on the bottom plate (top plate) and place it on a lifter table provided with a positioning guide. After that, turn on the start switch and drive the lifter air cylinder to -Push the table up toward the chuck and insert the chuck into the inner peripheral surface of the bottom plate (top plate) that covers the can body while continuing to lift the lifter table, and place the bottom plate (top plate) between the lifter table and the chuck. When the can body is sandwiched with a predetermined pressing force, the lifter air cylinder is turned off, the electromagnetic brake is released, and the chuck rotating servo motor starts rotating. The rotation of the servo motor for rotating the chuck is transmitted to the chuck rotating shaft via the drive pulley, timing belt and driven pulley, the chuck rotates, the can body covered with the bottom plate (top plate) rotates with the lifter table, and Rotate the servo motor for chuck rotation and drive with the rotary encoder provided in the servo motor for chuck rotation The sequencer and motion controller in the control panel interlock the movements of the chuck rotation servo motor and the first seaming actuator that match the programmed product, and the can cylinder has a constant rotation speed of the chuck rotation servo motor. If there is, since the peripheral speed of the long side portion and the short side portion and the corner portion of the bottom plate (top plate) and the can body is different, the servo motor for chuck rotation corresponding to each part a to h of the can body long cuboid The rotation of the servo motor for the first seaming roll is controlled, and the outer peripheral curl portion of the bottom plate (top plate) placed on the flange portion of the can body is pressed together with the flange portion by the annular groove portion and the flange portion of the first mixing roll. The primary winding process, and the second seaming roll servomotor is automatically driven, and the second seaming roll The secondary winding process in which the primary winding part is pressed by the grooved part and the collar part, and the secondary winding process is performed in the same manner as the primary winding process. While stopping, the first seaming roll and the second seaming roll are returned to their original positions by the first seaming roll servomotor and the second seaming roll servomotor, and the lifter table is not rotated by the electromagnetic brake. The knockout cylinder and lifter air cylinder are operated simultaneously, and the bottom plate (top plate) is pushed downward by the knockout pad attached to the drive shaft of the knockout cylinder to separate it from the chuck, and the bottom plate (top plate) is wound. Place the lifter table in its original state with the can body tightened on the lifter table. Characterized in that comprising a step of decreasing up location.

According to the present invention , the movement of the first seaming roll and the second seaming roll and the rotation of the chuck are performed by the respective servo motors, and the rotation of the lifter table is subordinate to the rotation of the chuck. Even if the edge is different from the center distance of an elliptical can etc., the rotation of the chuck can be controlled to an efficient rotation speed at a constant peripheral speed, and the movement of the first seaming roll and the second seaming roll can be tightened It can be performed corresponding to the edge portion. Further, the movement of the first seaming roll and the second seaming roll is uniform even during the tightening process, and the trajectory of the first seaming roll and the second seaming roll capable of ideal winding is freely driven. This can be easily done by changing the program input to the control unit. In other words, even in the can manufacturing process, even if the winding process that requires the most technology is a square can, an elliptical can, a deformed can, etc., it is shaped into a can (bottom plate or top plate) that performs the tightening process. It can be easily performed by changing the corresponding chuck and changing the program.

In addition, even if the edge portion is different from the center distance of a square can, an elliptic can, etc., the chuck can be rotated at a constant peripheral speed, and a good winding process without a winding failure can be performed.

Furthermore, when carrying out the can after finishing the winding process, the support of the can by the chuck can be reliably released, and the can can be moved to the carry-out position while being placed on the lifter table.

  Embodiments of the present invention will be described below with reference to the drawings.

  1 to 3 show an NC servo seamer according to a first embodiment of the present invention. FIG. 1 is a front view, FIG. 2 is a right side view, FIG. 3 is a plan view, and FIGS. FIG. 6 is an enlarged cross-sectional view showing a sandwiched state between the lifter table and the chuck.

  1 to 3, a lifter air cylinder 2 with a drive shaft constituting a lifter mechanism facing upward is fixed to an upper surface of a base 1 fixed with bolts to a floor or the like, and a frame 3 is It is erected on the rear side of the lifter air cylinder 2.

  A lifter table 4 provided with a positioning guide (not shown) is provided at the tip of the drive shaft of the lifter air cylinder 2. The lifter table 4 is rotatable about the drive shaft, and a can body 6 having a bottom plate or a top plate (hereinafter referred to as a bottom plate (top plate)) 5 covered on the lift table 4 by the guide. It can be positioned and placed. That is, as shown in FIG. 6, the opening of the can body 6 is formed with a flange portion 6a, and a bottom plate (top plate) 5 having an outer peripheral curl portion 5a is placed on the flange portion 6a. It has become.

  Between the base 1 and the lifter table 4, an electromagnetic brake mounting member 7 having two legs 7a fixed to the base 1 is disposed. An electromagnetic brake 8 that restricts rotation is provided.

  The upper part of the frame 3 is branched, and a chuck rotating servo motor 10 provided with a rotary encoder 9 for detecting a rotation state is attached to the branch part via an attachment member 11, and the chuck rotating servo motor 10 is rotated. A driving pulley 12 is fixed to the shaft.

  A chuck holding member 13 is disposed above the return table 4 on the front surface of the branch portion of the frame 3. The chuck holding member 13 extends at least in front of the return table 4, and the chuck 14 is provided at the tip of a chuck rotating shaft 15 that is rotatably held by the chuck holding member 13. As shown in FIG. 6, the chuck 14 is formed in a shape that fits inside the inner peripheral surface 5 b of the bottom plate (top plate) 5, and is connected to the chuck rotating shaft 15 by the driving pulley 12 and the timing belt 19. The driven pulley 20 is fixed. A through hole 16 is provided at the center of the chuck 14 and the chuck rotating shaft 15, and a drive shaft 17 a of a knockout cylinder 17 attached to the chuck holding member 13 is inserted into the through hole 16. A knockout pad 18 is attached to the tip of the drive shaft 17a of the knockout cylinder 17, and the bottom plate (top plate) 5 of the finished can is pressed downward to forcibly release the fitted state with the chuck 14. It has come to be able to do.

  A first seaming roll holding member 21 and a second seaming roll holding member 22 are fixed to the bottom of the chuck holding member 13, and the first seaming roll holding member 21 and the second seaming roll 21 are fixed. The roll holding member 22 is provided at a symmetrical position across the center of rotation of the chuck 14. The first seaming roll holding member 21 and the second seaming roll holding member 22 are provided with a first seaming roll electric actuator 23 and a second seaming roll electric actuator 24, respectively.

  The first seaming roll electric actuator 23 is provided with a first seaming roll servomotor 26 having a ball screw 25 as a rotation axis, and a ball screw nut 27 is screwed onto the ball screw 25, so that a first seaming roll servo is provided. The ball screw nut 27 is moved toward and away from the rotation axis of the chuck 14 by driving the motor 26. A first seaming roll moving member 29 is connected to the ball screw nut 27 via a connecting member 28, and the first seaming roll 30 is freely rotatable at the tip of the first seaming roll moving member 29. Is held in.

  As shown in FIG. 4, the first seaming roll 30 has an annular groove 30b formed on the outer peripheral surface of the roll member 30a and a collar 30c protruding below the annular groove 30b. The primary winding shown in FIG. 8 can be performed.

  The second seaming roll electric actuator 24 is configured similarly to the first seaming roll electric actuator 23, and includes a ball screw 31, a second seaming roll servo motor 32, a ball screw nut 33, a connecting member 34, A second seaming roll moving member 35 and a second seaming roll 36 are provided. As with the first seaming roll 30, the second seaming roll 36 has an annular groove 36b formed on the outer peripheral surface of the roll member 36a, and a collar 30c of the first seaming roll 30 below the annular groove 36b. As shown in FIG. 9, a flange portion 36 c having a smaller protrusion is formed, and secondary winding is performed to complete the tightening of the bottom plate (top plate) 5 and the can body 6. Yes.

Next, the operation of the NC servo seamer having the above configuration will be described.
As shown in FIGS. 1 and 2, a rectangular plate-shaped can body 5 is covered with a bottom plate (top plate) 5 and placed on a lifter table 4 provided with positioning guides (not shown). Thereafter, the start switch is turned on, the lifter air cylinder 2 is driven, and the lifter table 4 is pushed up toward the chuck 14. At this time, since the electromagnetic brake 8 is working, the rotatable lifter table 4 remains in a stopped state, and there is no change in the position of the can body 6 or the like that is positioned when placed.

  If the lift of the lifter table 4 is continued, as shown in FIG. 6, the chuck 14 is fitted into the inner peripheral surface 5 b of the bottom plate (top plate) 5 placed on the can body 6, and the lifter table 4 is interposed between the lifter table 4 and the chuck 14. A can body 6 covered with a bottom plate (top plate) 5 is sandwiched. When the air cylinder 2 is lifted with a predetermined pressing force, the lifter air cylinder 2 is turned off, the electromagnetic brake 8 is released, and the chuck rotating servo motor 10 starts rotating. The rotation of the chuck rotating servo motor 10 is transmitted to the chuck rotating shaft 15 via the driving pulley 12, the timing belt 19 and the driven pulley 20, and the chuck 4 rotates, and the can body 6 covered with the bottom plate (top plate) 5 is covered. Rotates together with the lifter table 4.

  When the chuck rotating servo motor 10 starts rotating, the chuck rotating servo suitable for the programmed product is prepared by the rotary encoder 9 provided in the chuck rotating servo motor 10, the sequencer and the motion controller in the drive control panel. The movement of the motor 10 and the first seaming actuator 23 is performed in conjunction with each other. At this time, if the rotational speed of the chuck rotating servomotor 10 is constant, the can body 6 has different long-side and short-side portions and peripheral speeds at the corners of the bottom plate (top plate) 5 and the can body 6. Therefore, the rotation speed curve A shown in FIG. 10B is programmed in correspondence with the respective parts a to h of the rectangular parallelepiped shown in FIG. 10A, and the chuck rotating servo motor 10 and the first seaming roll are used. The rotation of the servo motor 26 is controlled.

  Accordingly, as shown in FIG. 7, the outer peripheral curl portion 5a of the bottom plate (top plate) 5 placed on the flange portion 6a of the can body 6 and the annular groove portion 6b of the first mixing roll 30 together with the flange portion 6a. The primary winding which is pressed and tightened by the portion 6c is performed, and the primary winding in the state shown in FIG. 8 is completed. 7, 8, and 9, reference numeral 40 denotes a packing for maintaining the sealing performance of the tightening portion.

  When the primary winding is finished, the second seaming roll servomotor 32 automatically starts to drive, and the second seaming roll 36 presses the primary winding site by the annular groove 36b and the flange 36c. Then, the secondary winding is performed in the same manner as the primary winding, and the secondary winding is completed as shown in FIG.

  When the secondary winding is completed, the chuck rotating servo motor 10 stops at a fixed position, and the first seaming roll 30 and the second seaming roll 36 are connected to the first seaming roll servo motor 26 and the second seam roll 26, respectively. It is returned to the original position by the mingroll servomotor 32 and is locked so that the electromagnetic brake 8 works and the lifter table 4 does not rotate.

  Next, the knockout cylinder 17 and the lifter air cylinder 2 operate simultaneously, and the bottom plate (top plate) 5 is pushed downward by the knockout pad 18 attached to the drive shaft 17a of the knockout cylinder 17 to be separated from the chuck 14, and the bottom plate The can body 6 on which the (top plate) 5 is wound is placed on the lifter table 4, the lifter table 4 is lowered to the original position, and the winding work is finished.

  The NC servo seamer is configured to include a first seaming roll 30, a second seaming roll 36, and two types of seaming rolls. It can be set as the structure driven by each electric actuator for seaming rolls. For example, it comprises three types of seaming rolls consisting of a first seaming roll, a second seaming roll, and a third seaming roll, and is the same as the electric actuators 23 and 24 for the first and second seaming rolls. The third seaming roll is driven by the third seaming roll electric actuator configured as described above.

It is a front view which shows Example 1 of this invention. It is a right view of FIG. It is a top view of FIG. It is an expanded sectional view showing the 1st seaming roll. It is an expanded sectional view showing the 2nd seaming roll. It is an expanded sectional view which shows the time of clamping of the can body with a lifter table and a chuck | zipper. It is a fragmentary sectional view which shows the state which covered the bottom plate (top plate) to the can body. It is a fragmentary sectional view which shows the state of primary winding. It is a fragmentary sectional view which shows a secondary winding shape. It is a figure showing the relationship between the edge part position of a rectangular bottom plate (top plate), and rotational speed.

Explanation of symbols

1 base 2 air cylinder for lifter 3 frame 4 lifter table 5 bottom plate (top plate)
6 Can body 7 Electromagnetic brake attachment member 8 Electromagnetic brake 9 Rotary encoder 10 Servo motor for chuck rotation 11 Attachment member 12 Drive pulley 13 Chuck holding member 14 Chuck 15 Chuck rotation shaft 16 Through hole 17 Knockout cylinder 18 Knockout pad 19 Timing belt 20 Followed Pulley 21 First seaming roll holding member 22 Second seaming roll holding member 23 First seaming roll electric actuator 24 Second seaming roll electric actuator 25, 31 Ball screw 26 First seaming roll servomotor 27, 33 Ball screw nut 28, 34 Connecting member 29 Moving member for first seaming roll 30 First seaming roll 32 Servo motor for second seaming roll 35 Moving member for second seaming roll 36 Second seaming roll 40 Packing

Claims (2)

It is an NC servo seamer that winds a bottom plate or top plate around the opening of a rectangular can body made of a square or the like or an elliptic can body made of an ellipse .
A rotatable lifter table for placing the can body covered with the bottom plate or the top plate, a lifter mechanism for moving the lifter table in the vertical direction, and disposed above the lifter table via the bottom plate or the top plate. A chuck for supporting the can body between a lifter table, a chuck rotating servomotor for rotating the chuck at a rotational speed corresponding to a rotation angle about the axis of the can body, A first seaming roll and a second seaming roll that wind up the can body and the bottom plate or the top plate, and a rotation angle of the first seam roll and the second seaming roll about the axis of the can body A first seaming roll electric actuator and a second seaming roll electric actuator that move in the axial direction of the can body Serial chuck rotating servo motor and the first, the NC servo seamer which is composed of the drive control board of the electric actuator for the second seaming roll,
The chuck is configured such that its rotational speed is large at an edge position close to the axis of the can body supported, and small at a far edge position,
An NC servo seamer characterized in that the chuck comprises a knockout cylinder. It is an NC servo seamer that winds a bottom plate or top plate around the opening of a rectangular can body made of a square or the like or an elliptic can body made of an ellipse .
A rotatable lifter table for placing the can body covered with the bottom plate or the top plate, a lifter mechanism for moving the lifter table in the vertical direction, and disposed above the lifter table via the bottom plate or the top plate. A chuck for supporting the can body between a lifter table, a chuck rotating servomotor for rotating the chuck at a rotational speed corresponding to a rotation angle about the axis of the can body, A first seaming roll and a second seaming roll that wind up the can body and the bottom plate or the top plate, and a rotation angle of the first seam roll and the second seaming roll about the axis of the can body A first seaming roll electric actuator and a second seaming roll electric actuator that move in the axial direction of the can body Serial chuck rotating servo motor and the first, the NC servo seamer which is composed of the drive control board of the electric actuator for the second seaming roll,
The chuck is configured such that its rotational speed is large at an edge position close to the axis of the can body supported, and small at a far edge position,
The chuck is equipped with a knockout cylinder, and an NC servo seamer covers the bottom plate (top plate) on a rectangular can-shaped can body. After positioning and mounting on a lifter table provided with positioning guides, the chuck is started. Turn on the switch, drive the lifter air cylinder to push the lifter table toward the chuck, and fit the chuck on the inner peripheral surface of the bottom plate (top plate) that covers the can body while continuing to lift the lifter table In addition, the can body with a bottom plate (top plate) is sandwiched between the lifter table and the chuck, and when the can body is sandwiched with a predetermined pressing force, the lifter air cylinder is turned off and the electromagnetic brake is The chuck rotation servo motor starts rotating, and the rotation of the chuck rotation servo motor -The chuck rotates by being transmitted to the chuck rotating shaft via the timing belt and driven pulley, the can body covered with the bottom plate (top plate) rotates with the lifter table, and the servo motor for rotating the chuck rotates. By the rotary encoder provided in the chuck rotation servo motor, the sequencer and motion controller in the drive control panel, the movement of the chuck rotation servo motor and the first seaming actuator suitable for the programmed product are linked, and the can body If the rotation speed of the servo motor for chuck rotation is constant, the peripheral speed of the long side and the short side and the corners of the bottom plate (top plate) and the can body are different. Servo motor for chuck rotation and servo motor for first seaming roll corresponding to ah A primary winding step in which rotation is controlled and the outer peripheral curl portion of the bottom plate (top plate) placed on the flange portion of the can body is pressed and tightened together with the flange portion by the annular groove portion and the flange portion of the first mixing roll. When,
The servo motor for the second seaming roll is automatically driven, and the second seaming roll presses the primary winding portion by the annular groove portion and the flange portion, and performs the secondary winding tightening similarly to the primary winding 2 Next winding process,
After finishing the secondary winding, the servo motor for rotating the chuck is stopped at a fixed position, and the first seaming roll and the second seaming roll are moved by the first seaming roll servo motor and the second seaming roll servo motor. Return to the original position, lock the lifter table with the electromagnetic brake so that it does not rotate, operate the knockout cylinder and the lifter air cylinder at the same time, and use the knockout pad attached to the drive shaft of the knockout cylinder. A rectangular cube shape characterized by comprising a step of lowering the lifter table to the original position in a state where the can body having the bottom plate (top plate) is tightened and placed on the lifter table by pushing down on the chuck. A method of tightening the bottom plate (top plate) around the can body.

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