JP6671186B2 - Winding device - Google Patents

Description

  The present invention relates to a can mounting unit for mounting a can, a chuck unit having a chuck provided opposite to the can mounting unit, and a winding device including a seaming roll for winding a lid around the can.

Conventionally, a can mounting unit for mounting a can filled with a beverage or the like, a chuck unit having a chuck provided opposite to the can mounting unit, and a winding provided with a seaming roll for winding a lid around the can. Fastening devices are known.
As shown in Patent Document 1, for example, a known winding device includes a seaming turret (1) for performing a step of winding a can and a lid, and a carry-in conveyor (supply) that supplies a can before the winding to the seaming turret. Conveyor 7), a lid transport turret (supply turret 3) of a lid supply unit for supplying a lid, a discharge turret (discharge turret 5) for unloading the wound can from the seaming turret, and further removing the can from the discharge turret. A carry-out conveyor (discharge conveyor 8) for carrying out to the outside is provided.

The seaming turret, the discharge turret, and the lid transport turret are provided with pockets (fitting recesses 2, 4, and 6) for individually housing and transporting the can and lid, respectively, on the outer peripheral portion.
In each pocket of the seaming turret, a can mounting unit (lifter 17) for mounting a can, a chuck unit (seaming chuck device 10) provided opposite to the can mounting unit, and a lid are attached to the can. Seaming rolls (18, 19) for tightening are provided.
In the winding device configured as described above, the speed and timing of each turret and each conveyor are adjusted by gears and the like, and the operations of the can mounting unit, the chuck of the chuck unit and the seaming roll arranged in each pocket are controlled by gears. By interlocking the rotation of the seaming turret with a cam mechanism or the like, the can and the lid conveyed at high speed can be continuously wound while being delivered.

JP-A-62-24537

In such a known winding device, when a can mounting unit (lifter) and a knockout pad provided in each pocket of the seaming turret are provided, the pad is used to rotate the seaming turret by a cam mechanism. Ascends and descends in conjunction.
In a state where the lid supplied from the lid transport turret of the lid supply unit is placed on the can, the lid is clamped with the can mounting unit (lifter) with a chuck to perform winding and tightening.
At this time, if the fitting force between the chuck and the lid is insufficient, poor tightening due to slip occurs, and the can buckles when an excessive axial load is applied to prevent slip. If the center of the can and the lid are misaligned, an eccentric load is applied when the chuck and the lid are fitted, and the can buckles.
For this reason, knurling, sandblasting, or the like is performed on the chuck to increase the frictional force, or to increase the axial load applied to the can, but no satisfactory results have been obtained.
Furthermore, when the can with the lid placed for winding is lifted and lowered by a rotating can placing unit (lifter), and the rotating chuck is fitted to the lid placed on the can to perform centering. When rotating at high speed, contact between the body of the can and the side guide member etc. due to displacement of the center of rotation causes dents, scratches, etc. of the can, and also reduces the centering performance of the lid by the chuck. Such problems remain.

  The present invention is to solve the above-mentioned problems, to prevent poor tightening due to slip by increasing the fitting force between the chuck and the lid, to reduce the axial load applied to the can to prevent buckling, It is an object of the present invention to provide a fastening device capable of improving the centering performance of a lid and a chuck and preventing buckling due to an unbalanced load.

  A winding device according to the present invention includes a can mounting unit for mounting a can, a chuck unit having a chuck provided to face the can mounting unit, and a seaming roll for winding a lid around the can. The above-mentioned object is attained by providing a wind-fastening device, wherein the chuck has a lid suction means, performs centering by the lid suction means, and controls rotation of the chuck.

According to the winding device according to the first aspect of the present invention, the chuck has a lid suction unit, and the center of the lid is performed by the lid suction unit. In addition, poor tightening due to slippage can be prevented, so that the axial load applied to the can can be reduced, and buckling of the can can be prevented and the can can be made thinner.
In addition, when the lid is placed on the can, the lid is reliably centered by chucking by the chuck, so that buckling due to an uneven load is prevented.
Further, by controlling the rotation of the chuck, the rotation of the lid when sucking the lid to the chuck can be controlled, and the lid can be stably and reliably sucked by the chuck.
In addition, the processing can be performed at a higher speed by suctioning the lid to the chuck with a negative pressure at the upstream side of the seaming turret from the junction of the can and the can mounting unit.

According to the configuration of the present invention, by controlling the rotation of the plate of the can mounting unit, the rotation of the plate and the chuck is controlled to a low speed state in conjunction with the control of the rotation of the chuck. Dents and scratches due to contact between the can and the side guide member or the like are prevented. Further, it is possible to improve the centering performance of the lid by the chuck.
According to the winding device according to the third aspect , the chuck has the lid suction means, and the centering of the lid is performed by the lid suction means. In addition, poor tightening due to slippage can be prevented, so that the axial load applied to the can can be reduced, and buckling of the can can be prevented and the can can be made thinner.
In addition, when the lid is placed on the can, the lid is reliably centered by chucking by the chuck, so that buckling due to an uneven load is prevented.
Further, by controlling the rotation of the chuck, the rotation of the lid when sucking the lid to the chuck can be controlled, and the lid can be stably and reliably sucked by the chuck.
In addition, since the rotation of the chuck is performed by an independently controlled drive source, the start of rotation and the timing of acceleration can be optimally adjusted without stopping the operation by controlling the drive source. Can be easily performed in a short time, and the speed of the winding process can be increased.
According to the configuration of the fourth aspect, the rotation of the plate of the can mounting unit is performed by an independently controlled drive source, so that the start of rotation and the timing of acceleration are controlled by the drive source. Therefore, since the adjustment can be performed optimally without stopping the operation, the adjustment operation can be easily performed in a short time, and the speed of the winding-up process can be increased.
According to the configuration of the fifth aspect, the winding operation of the seaming roll is performed by an independently controlled drive source, so that the timing of the tightening operation is controlled by controlling the drive source, so that the operation is performed. The adjustment can be performed individually and optimally without stopping, the adjustment operation can be performed easily in a short time, the winding accuracy can be improved, and the speed of the winding process can be increased.
According to the configuration of the sixth aspect, since the drive source is a servomotor, the adjustment can be performed by an electric control command, and the feedback control can be performed. Can be performed more quickly, thereby improving the tightening accuracy and speeding up the tightening process.
According to the configuration of the present invention, since the pressing mechanism of the can mounting unit is configured to be operated by the fluid pressure, a constant pressing force is obtained, so that the adjustment is extremely easy and during operation. In particular, when the height of the can is slightly reduced during tightening, the axial load does not change even if the error of the actual can height reduction amount is absorbed by the pressing mechanism, and the tightening accuracy is improved. It is possible to increase the speed of the tightening process.
According to the configuration of the eighth aspect, since the pressing mechanism has the diaphragm that seals the fluid pressure, a sliding seal member is not required, and there is no sealing resistance at the time of lifting and lowering, and the plate is raised and lowered smoothly. be able to.
According to the configuration of the ninth aspect, since the chuck unit has the rotary vane pump for forcibly discharging the lubricating oil, the accumulation of the lubricating oil on the upper portion of the oil seal is minimized, and the chuck is rotated from the oil seal. Leakage and contamination of the lubricating oil can be prevented.

FIG. 3 is an explanatory view of a transport path of the fastening device according to the embodiment of the present invention. FIG. 2 is an explanatory diagram of a can mounting unit, a chuck, and a seaming roll of the fastening device according to the embodiment of the present invention. FIG. 3 is an explanatory diagram of a chuck and a seaming roll of the winding device according to the embodiment of the present invention. FIG. 4 is an explanatory view at the time of winding in FIG. 3. FIG. 3 is an explanatory diagram of the pressing mechanism of FIG. 2. FIG. 7 is an enlarged explanatory view of another embodiment of the pressing mechanism of the can mounting unit. FIG. 5 is an enlarged explanatory view of another form of the chuck unit. Sectional drawing of FIG.

As shown in FIG. 1, a winding device 100 according to an embodiment of the present invention includes a seaming turret 101 for performing a step of tightening a can C and a lid F, and a can C before being wound onto the seaming turret 101. A supply conveyor 104 for supplying the lid F, a lid supply unit 104 having a lid supply device 105 for supplying the lid F, and a lid transport turret 106; a discharge turret 107 for transporting the canned CM from the seaming turret 101; The apparatus further includes an unloading conveyor 108 for unloading the CM from the discharge turret 107 to the outside.
Each of the seaming turret 101, the discharge turret 107, and the lid transport turret 106 is provided with a pocket P for individually housing and transporting the cans C, CM, and the lid F on the outer peripheral portion. And an attachment 103 for individually engaging and transporting.

The rotation speed of the seaming turret 101, the discharge turret 107, and the lid transport turret 106, the moving speed of the attachment 103 of the carry-in conveyor 102, and the interlocking timing of each pocket P and the attachment 103 are determined by the cans C and CM between each turret and the conveyor. And the lid F is designed to be adjustable so that it can be smoothly delivered.
Then, as shown in FIG. 1, the lid transfer turret 106 is arranged such that the position Gb at which the lid F is suctioned to the chuck 121 with a negative pressure is located on the upstream side of the seaming turret 101 with respect to the normal junction G. At the position Gb where the lid F is suctioned negatively to the chuck 121, the lid F is suctioned negatively to the chuck 121 to perform centering.
As shown in FIG. 2, the seaming turret 101 that performs the step of winding the can C and the lid F is opposed to the can mounting unit 110 for mounting the can C in each pocket P and the can mounting unit 110, respectively. And a seaming unit 130 having a seaming roll 131 for winding the lid F around the can C.

The seaming turret 101 is rotatably driven by a drive motor 151, and is configured to be able to detect a pocket position from its rotation phase by a pocket position detection encoder 155.
In addition, a pitch sensor S including a photoelectric tube, a proximity switch, a laser, and the like for detecting the position of the attachment 103 of the carry-in conveyor 102 is provided on a transport path of the carry-in conveyor 102, and the seaming turret 101 is provided by an output of the pitch sensor S. And the position of the attachment 103 with respect to the pocket P of the lid transport turret 106 is controlled.
By performing detection and control in this manner, the adjustment work can be performed more easily, and errors in the positions of the pockets and attachments and fluctuations in the position during operation are automatically detected and adjusted. This makes it possible to improve the tightening accuracy and to speed up the tightening process.

The lid supply device 105, the lid transport turret 106, and the carry-in conveyor 102 are independently controlled by a drive motor 153 of the lid supply device 105, a drive motor 152 of the lid transport turret 106, and a drive motor 154 of the carry-in conveyor 102, respectively. Driven by a source.
By driving the carry-in conveyor 102, the lid supply device 105, and the lid transport turret 106 with independently controlled drive sources, the operation timing can be individually and optimally adjusted without stopping the operation using an operation panel or the like. Adjustment work for preventing deformation, scratching, dents of the can, and poor tightening due to misalignment of the lid can be easily performed in a short time.
Each of the motors employs a servomotor so that the speed and timing can be individually adjusted, and can follow the speed and timing fluctuations of the seaming turret 101 in accordance with the output of the pocket position detection encoder 155. It is configured.

Similarly, the rotation of the plate 112 and the chuck 121 is performed by using the drive motor 157 of the can mounting unit 110 and the drive motor 156 of the chuck 121 as drive sources, and the roll swing shaft 132 is driven by the drive motor 158 of the roll swing shaft 132. Are driven by independently controlled driving sources.
In this manner, by driving the driving sources independently controlled, the timing of starting and accelerating the rotation of the plate 112 and the chuck 121, the timing of the tightening operation, and the pressing amount are controlled by the respective driving sources. This makes it possible to individually and optimally adjust the operation without stopping the operation using an operation panel or the like, and thus the adjustment operation can be easily performed in a short time.

Further, by using a servo motor as the drive source, the adjustment can be performed by an electric control command, and the feedback control can be performed, so that the adjustment operation can be easily performed in a short time.
It should be noted that the discharge turret 107 and the unloading conveyor 108 not shown in FIG. 2 deliver only the can CM after the winding and allow some deviation in speed and timing. An appropriate drive source may be used, such as mechanically driving the motor through a transmission mechanism.
Further, if the design is such that the speed and timing can be easily adjusted in terms of accuracy and speed, the seaming turret 101 which can be easily used for the lid supply device 105, the lid transport turret 106, and the carry-in conveyor 102. An appropriate drive source may be used, such as mechanically driving the drive motor 151 via a transmission mechanism.

The can mounting unit 110 has a plate 112 on which the can C is mounted, and a pressing mechanism 111 for elastically pressing the plate 112 upward.
As shown in FIG. 5, the pressing mechanism 111 is configured such that a piston 114 having a plate 112 fixed thereon is inserted into a cylinder space 113 and a pressurized fluid such as compressed air is supplied into the cylinder space 113. Then, the plate 112 is elastically pressed upward.
As described above, since the pressing mechanism 111 is operated by the fluid pressure of the compressed air or the like, in order to obtain a constant axial load, the fluid pressure to be supplied only needs to be adjusted by the supply source. There is no need to individually adjust the pressing mechanisms 111 of the mounting unit 110, and the adjustment operation can be easily performed in a short time.
Further, by adjusting the axial load by the fluid pressure, the buckling of the can C can be prevented without applying an impact load.
In addition, it is possible to apply a constant load following the can height reduction during winding, improve the winding accuracy, obtain stable winding dimensions, and speed up the winding process. Becomes

Further, the can mounting unit 110 is moved up and down by a vertical movement mechanism 115 of the can mounting unit 110 including a vertical cam 116 and a vertical cam follower 117.
The vertical cam 116 is fixedly provided. When the seaming turret 101 rotates, the vertical cam follower 117 moves according to the cam profile, and the can mounting unit 110 moves up and down according to the position.
By having the vertical movement mechanism 115 for vertically moving the can placement unit 110, the vertical movement mechanism 115 can be used together with the pressing mechanism 111 to move the can C placed on the can placement unit 110 to the chuck 121. The mechanism can be simplified as a mechanism for only ascending.
In addition, the vertical movement mechanism 115 of the can mounting unit 110 is configured not to operate during the winding operation of the seaming roll, so that the operation of the pressing mechanism 111 during the winding operation is reliably and stably performed. It is possible to do.

The chuck 121 of the chuck unit 120 is provided rotatably and fixedly, and has a negative pressure suction hole 125 as shown in FIGS. By suctioning under negative pressure, a lid suction means capable of holding the lid F alone by suction is configured.
In this case, the lid F is attracted to the chuck 121 to perform centering, and then the can mounting unit 110 is raised to fit the lid F to the can.
As described above, by adhering the lid F to the chuck 121 and performing centering of the lid F, the fitting force between the chuck 121 and the lid F is increased, and poor tightening due to slip is prevented, and the can is applied to the can C. Thus, the buckling of the can C is prevented, and the thickness can be reduced.
Further, when the lid F is placed on the can C, the lid F is securely centered by the suction by the chuck 121, and buckling due to an uneven load is prevented.
Further, by controlling the rotation of the chuck 121, the rotation of the lid F when attracting it to the chuck 121 is controlled, and the lid F can be stably and reliably attracted by the chuck 121.
The chuck 121 does not have a conventional knockout pad at the center thereof as shown in the figure, and the lid F is suctioned by the lid suction means of the chuck 121 to perform centering of the lid F with respect to the can. .

The operation of the winding device 100 configured as described above will be described.
The can C before the lid F is fastened is engaged with each attachment 103 of the carry-in conveyor 102, is conveyed, and heads toward the seaming turret 101.
On the other hand, the lid F is cut out one by one from the lid supply device 105 and delivered to each pocket P of the lid transport turret 106, and is directed to the seaming turret 101 by the rotation of the lid transport turret 106.
Usually, the speed and timing of the loading conveyor 102 and the lid transport turret 106 are adjusted in accordance with the speed and timing of the seaming turret 101 such that the centers of the cans C and the lid F coincide at the junction G. Then, at a position Gb where the upstream side lid F is suctioned to the chuck 121 with a negative pressure, the lid F is attracted to the chuck 121 whose rotation is controlled by the drive motor (servo motor) 156, and the centering of the lid F is performed. .

Thereafter, at the junction G, the can mounting unit 110, the rotation of which is controlled by the drive motor (servo motor) 157, rises, so that the lid F is mounted on the can C, and the can C on which the lid F is mounted is , Against the pressing force of the pressing mechanism 111, is held between the plate 112 and the chuck 121 with a constant axial load required for winding.
When the can C on which the lid F is placed is nipped, a mechanism that elastically presses the plate 112 upward by a pressurized fluid such as compressed air when the can C is held is used. A constant pressing force is obtained and a constant pressing force is obtained irrespective of the amount of pressing and lowering of the plate 112, so that the adjustment is extremely easy and does not fluctuate during operation.
Note that a mechanical spring may be used as the pressing mechanism 111 as long as the pressing force can be easily adjusted in terms of accuracy and speed.

When the seaming turret 101 further rotates, the plate 112 and the chuck 121 accelerate to the number of rotations necessary for the tightening before the sandwiched can C reaches the tightening section E shown in FIG.
Since the drive sources for the rotation of the plate 112 and the chuck 121 are driven by the servo motors 157 and 156 that are independently controlled, the start and acceleration timing of the rotation of the plate 112 and the chuck 121 are independently controlled. It is possible to make individual adjustments without stopping the operation, to perform adjustment work easily in a short time, and to cope with fluctuations during operation.
Further, the start of rotation and the timing of acceleration of the plate 112 and the chuck 121 are controlled, the can C is raised by the plate 112 of the can mounting unit 110 that rotates, and the can C is placed on the lid F that is attracted to the chuck 121 that rotates. At the time of fitting, the rotation of the plate 112 and the chuck 121 is stopped, and the rotation is controlled at a low speed to reduce the displacement of the center of rotation, thereby preventing the dent of the can C due to the contact with the guide member, etc. Further, the centering performance of the lid F by the suction of the chuck 121 can be improved.

While passing through the winding section E, the roll swing shaft 132 of the seaming unit 130 is operated by the drive motor (servo motor) 158, and the seaming roll 131 is pressed from the side, whereby the winding is performed.
Although only one seaming roll 131 is shown in the drawing, in actuality, the roll swing shaft 132 is provided with two seaming rolls 131 for primary winding and secondary winding, and It is sequentially pressed while passing through the section E, and the tightening is completed.
The drive source of the roll swinging shaft 132 uses a servomotor 158 that is independently controlled in order to link with the rotation phase of the seaming turret 101. Since the pressing amount can be controlled independently and can be adjusted individually and optimally without stopping the operation, adjustment work can be performed easily in a short time, and it is possible to cope with fluctuations during operation. Become.
The release of the suction by the negative pressure of the lid suction means of the chuck 121 is performed at an appropriate timing such as placing the lid F on the can C, during the tightening process, or after the completion of the tightening.
Further, when the can mounting unit 110 is moved up and down after the completion of the winding and before the delivery to the discharge turret 107, in order to surely separate the chuck 121 and the lid F, the negative pressure suction hole of the lid suction means is used. A positive pressure may be applied to 125.

When a mechanism that elastically presses the plate 112 upward with a pressurized fluid such as compressed air is used as the pressing mechanism 111 as in the above-described embodiment, the height of the can C is slightly reduced during tightening. At this time, even if an error of the actual can height reduction amount is absorbed by the pressing mechanism 111, the axial load does not fluctuate, thereby improving the tightening accuracy and increasing the speed of the winding process.
The can CM that has been completely tightened is delivered from the seaming turret 101 to the discharge turret 107, further delivered from the discharge turret 107 to the unloading conveyor 108, and is delivered to the next process such as inspection and packing.

FIG. 6 shows a can mounting unit 110b having another type of pressing mechanism. As shown in the drawing, the pressing mechanism 111b hermetically seals a piston 114b for raising and lowering a plate 112b with respect to a cylinder space 113b by a diaphragm 118b. It is configured to keep.
This eliminates the need for a sliding seal member, and there is no sealing resistance when the piston 114b moves up and down, so that the plate 112b can move up and down smoothly.

FIGS. 7 and 8 show another embodiment of the chuck unit in the winder according to the present invention. As shown in FIG. 7, the chuck unit 120c is provided above the lowermost oil seal 129c with the rotation of the chuck 121c. A rotating blade pump 127c that rotates is provided, and the lubricating oil is forcibly discharged from the discharge tube 128c by the rotation of the rotating blade pump 127c.
Accordingly, the amount of lubricating oil stored on the oil seal 129c can be minimized, and the leakage and contamination of the lubricating oil from the oil seal 129c due to the rotation of the chuck 121c can be prevented.

Reference numeral 100: Winding device 101: Seaming turret 102: Loading conveyor 103: Attachment 104: Lid supply unit 105: Lid supply device 106: Lid transport turret 107: Discharge turret 108 ... Unloading conveyor 110 ... Can mounting unit 111 ... Pressing mechanism 112 ... Plate 113 ... Cylinder space 114 ... Piston 115 ... Vertical movement mechanism 116 ... Up and down Moving cam 117 Vertical movement cam follower 118 Diaphragm 120 Chuck unit 121 Chuck 125 Negative pressure suction hole (lid suction means)
126 ··· Chuck outer periphery 127 ··· Rotating vane pump 128 ··· Discharge tube 129 ··· Oil seal 130 ··· Seaming unit 131 ··· Seaming roll 132 ··· Roll swing shaft 151 · .. Drive motors (drive sources) for seaming turrets
152 ··· Drive motor (drive source) for lid transport turret
153 ··· Drive motor (drive source) of lid supply device
154 ・ ・ ・ Driving motor (drive source) for carry-in conveyor
155 ・ ・ ・ Pocket position detection encoder (detection means)
156 ··· Drive motor (drive source) for chuck
157 ··· Driving motor (drive source) for can mounting unit
158 ··· Drive motor (drive source) for roll swing shaft
C ・ ・ ・ Can (before closing the lid)
F ・ ・ ・ Lid CM ・ ・ ・ Can (after tightening the lid)
P ... pocket E ... winding section G ... confluence point

Claims (9)

A seaming turret, a can placement unit in which a plurality disposed in said seaming turret, tighten winding a plurality of chuck units, the lid can having a chuck disposed opposite to each of the cans placement unit seaming A winding device having a roll,
The chuck has a lid suction means, and performs centering of the lid by the lid suction means,
Configured to control the rotation of the chuck ,
A winding device , wherein a position where the lid is suctioned to the chuck by a negative pressure is located upstream of a seaming turret with respect to a junction of the can and the can mounting unit .   The apparatus according to claim 1, wherein the rotation of the plate of the can mounting unit is controlled. A seaming turret, a plurality of can mounting units arranged on the seaming turret, a plurality of chuck units each having a chuck provided opposite to the can mounting unit, and seaming for winding a lid around the can A winding device having a roll,
The chuck has a lid suction means, and performs centering of the lid by the lid suction means,
The rotation of the chuck, seaming apparatus you and performing a driving source which is controlled independently.   4. The device according to claim 2, wherein the rotation of the plate of the can mounting unit is performed by an independently controlled drive source. 5.   The winding device according to any one of claims 1 to 4, wherein the winding operation of the seaming roll is performed by an independently controlled drive source.   The winding device according to claim 3, wherein the drive source is a servomotor.   The winding device according to any one of claims 1 to 6, wherein the pressing mechanism of the can mounting unit is configured to operate by fluid pressure.   The device according to claim 7, wherein the pressing mechanism includes a diaphragm that seals fluid pressure.   9. The device according to claim 1, wherein the chuck unit includes a rotary blade pump for forcibly discharging lubricating oil.

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