JP6478519B2 - Can lid winding device and can lid winding method - Google Patents

Description

  The present invention relates to a can lid winding device and a can lid winding method for double winding a can lid on a container.

Conventionally, in cans used for solids, liquids and mixtures thereof, a can lid is placed on a container and fixed at a position corresponding to the central axis of the winding head, while the winding head revolves the winding roll. A double winding technique is known in which the curled portion of the can lid is wound around the flange portion of the can body, and is crimped, joined, and kept sealed (see, for example, Patent Document 1).
The can lid winding device known from Patent Document 1 is provided with four winding rolls (seaming roll d) provided at 90 ° intervals on a winding head (seaming head 7), and two pieces facing each other at 180 °. Initial winding (first seaming operation) is performed by the winding rolls (seaming rolls d1 and d3), and then the final winding is performed by the other two winding tightening rolls (seaming rolls d2 and d4) facing each other at 180 °. Winding (second seaming operation) is performed to form the winding portion.

Japanese Patent Publication No.54-12873

In the above-described can lid winding apparatus, in order to increase the processing per unit time and improve the productivity, it is possible to increase the revolution speed of the winding roll by the winding head and shorten the processing time. .
However, when a heavy object such as a winding head is stably rotated at a high speed, high dimensional accuracy and assembly weight balance are required, and the apparatus main body is enlarged to maintain the mechanical rigidity of the rotation center shaft and the like. Since it is necessary, there is a limit in speeding up the method of increasing the revolution speed described above.

  Here, the inventors of the present invention are that the above-described can lid winding apparatus performs the initial winding process and the final winding process with one winding head, that is, the initial winding is performed on one winding head. When the tightening roll and the final winding roll are provided, it is necessary to make the final winding roll stand by in the initial winding process and the initial winding roll in the final winding process. The present invention has been completed by paying attention to these points.

  That is, according to the present invention, when a plurality of containers are intermittently sent and tightened, the waiting time of each winding roll generated in each winding process is shortened, thereby speeding up the processing per unit time. An object of the present invention is to provide a can lid winding device and a can lid winding method.

A can lid winding device according to the present invention is a can lid winding device in which a winding head revolves a winding roll around a container and performs double winding by pressing the winding roll toward the container. A conveyance turret for intermittently conveying the container, wherein the winding head includes an upstream winding head and a downstream winding head, and the upstream winding head and the downstream winding head are included in the single transfer. disposed on the turret, the seaming roll, and at least the initial seaming roll and the final seaming roll, before Symbol initial seaming roll is disposed on the upstream seaming head, the final seaming roll, The problem is solved by being arranged in the downstream winding head.

The can lid winding method according to the present invention is a can lid winding method in which a winding roll is revolved around a container and pressed in the container direction to perform double winding, and the container is conveyed intermittently. A winding turret, the winding head including an upstream winding head and a downstream winding head, the upstream winding head and the downstream winding head being disposed on one of the transfer turrets, and the winding roll Includes at least an initial winding roll and a final winding roll, and at the first winding position where the upstream winding head operates, the initial winding roll performs initial winding and the downstream winding head operates. The above-mentioned problem is solved by performing final winding with the final winding roll at the second winding position.

According to the can lid winding apparatus and the can lid winding method according to claims 1 and 8, the can lid has a transport turret for intermittently transporting the container, and the winding head includes an upstream winding head and a downstream winding head. The upstream winding head and the downstream winding head are disposed on one transport turret, and the winding roll includes at least an initial winding roll and a final winding roll, and an initial winding roll Is disposed in the upstream winding head, the final winding roll is disposed in the downstream winding head, and the initial winding is performed by the initial winding roll at the first winding position where the upstream winding head operates, and the downstream winding is performed. By performing final winding with the final winding roll at the second winding position where the tightening head operates, the container is intermittently sent on one transport turret so that the initial winding and final winding can proceed simultaneously. Possible and occurs in each winding process It is possible to shorten the waiting time of each winding roll to increase the processing per unit time .
According to the can lid winding apparatus according to claim 2, the winding head includes an upstream winding head and a downstream winding head, and the winding roll includes at least an initial winding roll and a final winding roll. The initial winding roll is disposed on the upstream winding head, and the final winding roll is disposed on the downstream winding head. As a result, the upstream winding head performs initial winding with the initial winding roll, and the downstream winding head performs final winding with the final winding roll, so that the initial winding and the final winding are performed simultaneously. This makes it possible to shorten the waiting time of each winding roll generated in each winding process, and to increase the processing per unit time.
Further, the winding head includes a pressing mechanism having a shank portion that supports the winding roll in a swingable manner, a cam lever extending from the shank portion, and a cam follower attached to the cam lever, and the pressing mechanism includes: The winding roll is supported so that it can rotate and can stop or advance, and the cam lever has a counterweight portion on the opposite side of the cam follower so that the winding roll, the shank portion, and the cam lever revolve around the container. It is possible to set so as to generate a swinging moment in the direction in which the cam follower is pressed against the cam by the centrifugal force at the time, and the load on the cam pressing spring can be reduced. In addition, the higher the rotational speed and the higher the centrifugal force, the more the cam follower can be urged toward the cam side, and the winding roll can be accurately traced by the cam and the movement trajectory specified by the cam. Thus, the winding accuracy can be improved.

1 is a schematic front view of a can lid winding device according to an embodiment of the present invention. Plane explanatory drawing of the can lid winding apparatus of FIG. The perspective view of an upstream winding head. Sectional drawing of an upstream winding head. Sectional drawing of a winding roll, a shank part, and a cam lever. Plan explanatory drawing of a cam and a cam follower. The leveling process drawing of the can lid winding method concerning one embodiment of the present invention. Arrangement explanatory drawing of the winding roll under the lower flange of Drawing 4. The perspective view in the vicinity of a winding roll and a shank part, and side surface partial sectional drawing. FIG. 5 is an explanatory diagram of an arrangement of a cam lever below the upper flange of FIG. 4. The perspective view of a cam lever and a shank part vicinity, and a partially exploded perspective view. The perspective view of a downstream winding head. Sectional drawing of a downstream winding head. The partial cutaway perspective view of a can lid supply mechanism. The top view of a can lid supply mechanism. Side surface sectional drawing of a can lid supply mechanism.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
A can lid winding device 100 according to an embodiment of the present invention, as shown in FIGS. 1 and 2, revolves the winding roll around the container and can press the winding roll in the container direction, which will be described later. An upstream winding head 110 and a downstream winding head 120, a container transport mechanism 170, and a can lid supply mechanism 180 are provided.
The container transport mechanism 170 includes a carry-in conveyor 172 that supplies the can 1 (container) from the outside, and a transport turret 171 that intermittently transports the can 1 inside.
The transport turret 171 has a plurality of can transport pockets (not shown) at equal intervals in the circumferential shape, and is configured to rotate intermittently. The can body 1 transported from the transport conveyor 172 is By the intermittent rotation, the can lid supply position 108, the first winding position 101 where the upstream winding head 110 operates, the second winding position 102 where the downstream winding head 120 operates, and the discharge position 103 are stabilized in this order. Are transported.
The can lid supply mechanism 180, which will be described later, includes a feeding unit 184 that feeds a plurality of can lids 2 from the outside, and a cutout unit 181 that takes out the lowermost one of the plurality of can lids 2 that have been loaded and stacked. And a transport unit 182 for transporting the taken-out can lid 2 to the can lid supply position 108.

  As shown in FIGS. 3 to 5, the upstream winding head 110 includes a head center shaft 112 and a head rotating cylinder 113 that is externally fitted to the head center shaft 112 and is rotatably attached. An upper flange 115 is fixed to the upper part of the head rotating cylinder 113, and a lower flange 116 is fixed to the lower part of the head rotating cylinder 113, and the head rotating cylinder 113 is rotated integrally around the head central axis 112 by an appropriate drive source (not shown). Four shank support portions 117 are erected on the lower flange 116 at intervals of 90 °, and respectively support the shank shafts 151 holding the initial winding rolls 130 in a rotatable manner. In other words, four initial winding rolls 130 are arranged at 90 ° intervals on the upstream winding head 110.

  The lower end of the head central shaft 112 is provided with a winding chuck 142 for pressing the can lid 2 placed on the can body 1 from above, and a can lid pressing shaft provided with a knockout pad 143 at the lower end. 114 is provided, and the can lid pressing shaft 114 is urged by a can lid pressing spring 119 so as to protrude downward. A cover 118 is detachably provided on the outer peripheral side of the lower flange 116. FIG. 3 is a view with the cover 118 removed.

The head rotating cylinder 113 is provided with a cam 111 below the upper flange 115 so as to be rotatable with respect to the head rotating cylinder 113. The cam 111 is attached detachably and easily with a fastening member such as a bolt. (See Figure 4)
In this embodiment, the cams 111 are provided in two upper and lower stages, and the two cams 111a and 111b are arranged with a 90 ° phase change. As shown in FIG. 6, the upper cam 111a is formed with a profile for operating two cam followers 161a and 161c at positions facing each other along the locus Ka, and the lower cam 111b is facing 180 °. A profile is formed for operating the other two cam followers 161b and 161d at the positions along the locus Kb.
In addition, the two cams 111a and 111b are integrally fixed, and are configured to rotate relative to the head rotating cylinder 113 by using a differential gear mechanism or the like (not shown). In accordance with the number of times, the number of rotations of the head rotating cylinder 113 with respect to the head central axis 112 and the number of rotations of the two cams 111 with respect to the head rotating cylinder 113 are set to a predetermined ratio.

The upstream winding head 110 includes a shank portion 150 that supports the initial winding roll 130 in a swingable manner, a cam lever 160 that is fixed to the shank portion 150, and a cam follower 161 that is rotatably supported by the cam lever 160. It has.
The shank portion 150 has a shank shaft 151, a shank lever 152, and a shank fixing member 153 that fixes the shank lever 152 at the lower end portion 154 of the shank shaft 151, and a roll center that rotatably supports the initial winding roll 130. The shaft 131 is fixed on the opposite side of the shank lever 152 from the shank fixing member 153.

On the other hand, a cam lever 160 is fixed to the upper end portion 155 of the shank shaft 151. That is, the pressing mechanism supports the initial winding roll 130 so that it can rotate and can stop or advance. The cam lever 160 is provided with a cam pressing spring 162 to prevent the cam 111 and the cam follower 161 from being separated when the pressing is released at the time of high-speed rotation, and the cam follower 161 is pulled in the direction of the cam 111.
Thus, the cam follower 161 moves following the cam 111 of the upstream winding head 110, whereby the shank shaft 151 rotates and the initial winding is performed on the flange portion of the can body 1 and the curl portion of the can lid 2. The clamping roll 130 is pressed and released.

The cam 111 provided in each head as a driving unit of the pressing mechanism controls the shift amount and timing of the initial winding roll 130 by its profile, and in the winding process of the winding (initial winding), a winding region Then, the shift amount of each winding roll is controlled so that the processing amount becomes constant, and each winding roll is moved at high speed in the non-winding region.
Further, in the present embodiment, as shown in FIG. 7, it includes a “leveling process” for maintaining the same amount of pressing by each winding roll before the end of the initial winding and final winding. A profile is adopted in which the initial winding roll 130 is immediately detached from the can 1 immediately after completion of the fastening.

In this way, the setting of the trajectory for pressing and detaching the winding roll is optimized to achieve better tightening with improved winding stability such as the tightening dimension and tightening shape, and further processing per unit time. It is possible to increase the speed.
That is, even when tightening the thin-walled can body and the can lid that have been gauged down, the generation of wrinkles during the winding of the flange portion of the can body and the curl portion of the can lid, which has been a concern, has been reduced. It is possible to smooth the surface of the winding.
In addition, unintentional contact between the initial winding roll 130 in the middle of separation and the winding portion of the can body 1 can be avoided, and the container can be moved immediately to improve the processing speed, so that the winding can be performed more efficiently. Can be done.
It should be noted that the cam can be changed to an arbitrary cam having an optimum amount of winding roll displacement and timing cam curve according to the processing conditions of the target can body and can lid.

  In addition, instead of the cam, the cam follower, and the cam lever, a servo motor with a speed reducer (not shown) that controls and drives the movement trajectory dedicated to each head is connected to the shank shaft upper end portion 155 as the driving mechanism of the pressing mechanism. The trajectory including the optimum winding tightening process and the leveling process may be changed and operated by program-controlling the shank shaft so as to have a trajectory including the tightening process and the leveling process.

  By the way, when the head rotating cylinder 113 rotates, centrifugal force is generated, and as shown in FIGS. 8 to 11, a rotational moment is generated toward the cam follower 161 about the shank shaft 151 as a central axis. For this reason, the cam pressing spring 162 is provided and the cam follower 161 side is pulled and biased toward the cam 111. However, as the rotational speed of the head rotating cylinder 113 increases, the rotational moment further increases, and the cam pressing spring 162 is moved. And the cam follower 161 is biased in the direction of separating, and the cam follower 161 may be detached from the cam 111. Alternatively, the initial winding roll 130 is also biased in the direction of separating, and the winding accuracy may be reduced.

  Therefore, the cam lever 160 has a counterweight portion 163 on the side opposite to the cam follower 161 in order to generate a rotation moment in a direction to cancel the rotation moment generated in the cam follower 161. The counterweight portion 163 is set so that the center of gravity of the entire member that swings together with the shank shaft 151 is located on the counterweight portion 163 side from the line connecting the revolution center and the rotation center of the shank shaft 151. By giving a rotational moment in the direction to cancel the rotational moment generated in the cam follower 161 to the counterweight portion 163 side, a swinging moment can be given to the cam follower 161 connected via the cam lever 160 in a direction to be pressed against the cam 111 side. It becomes possible.

According to the above configuration, it is possible to set so that a swinging moment in a direction in which the cam follower is pressed against the cam is generated by the centrifugal force when the winding roll, the shank portion, and the cam lever revolve around the container. The load on the spring can be reduced. In addition, the higher the rotational speed and the higher the centrifugal force, the more the cam follower can be urged toward the cam side, and the winding roll can be accurately traced by the cam and the movement trajectory specified by the cam. Thus, the winding accuracy can be improved.
In addition, since the above-mentioned counterweight part 163 presses the cam follower 161 to the cam 111 side appropriately, the shape, weight, etc. suitable for a desired specification can be selected and changed.
In FIG. 10, the position where the cam follower 161 contacts the peak portion of the cam 111 is indicated by a solid line, and the position where the cam follower 161 contacts the valley portion of the cam 111 is indicated by a two-dot chain line.

At the first winding position 101, initial winding is performed in which the curled portion of the can lid 2 is wound around the flange portion of the can body 1. In the case of this embodiment, four initial winding rolls 130 are arranged in the upstream winding head 110, and when the initial winding is started, four cam followers 161a and 161c are taken along the tracks Ka and Kb of the cam 111. , 161b, 161d move simultaneously, and the four initial winding rolls 130 supported by the pressing mechanism so as to be able to rotate and stop or advance / retreat simultaneously start a shifting operation.
When the initial winding roll 130 contacts the curled portion of the can lid 2 and revolves 1/4, the previous initial winding roll 130 enters the curled region of the processing start point. That is, when the initial winding roll 130a connected to the cam follower 161a revolves 1/4, the initial winding roll 130d connected to the cam follower 161d enters the curl region of the machining start point. Similarly, each initial winding roll 130b, 130c, 130d enters the curl region of the processing start point of the immediately preceding initial winding roll 130a, 130b, 130c. Thereafter, the immediately preceding initial winding roll 130 continues to revolve in the region in the middle of processing, and the amount of processing until the initial winding is completed closes between the effective winding rotational speeds.
At that time, the amount of processing for plastic working involving the flange portion of the can body 1 and the curled portion of the can lid 2 is shared by the four initial winding rolls 130, and the amount of processing per revolution is 1 / Since 4 is sufficient, the can lid pressing amount per one initial winding roll (processing depth) can be ½ that of the conventional two initial winding rolls.
As a result, even if the processing speed is further doubled compared to the case of the conventional two initial winding rolls, the processing amount is doubled, but the processing amount per one winding roll (processing depth). Since this is the same as in the prior art, suitable winding can be performed, and the processing time can be shortened and the winding speed can be increased.

As shown in FIGS. 12 and 13, the downstream winding head 120 has two shank support portions 117 erected on the lower flange 116 at an interval of 180 °, and the two final winding rolls 140. Are arranged at intervals of 180 °.
The cam 111 is provided in one stage (hereinafter referred to as the cam 111c), and a profile is formed for operating the two cam followers 161e and 161f at positions facing each other along a locus Kc (not shown). The deviation amount and timing of the roll 140 are controlled, the winding process of the crimping (final winding) is controlled, and the cam profile including the above-described “running process” is employed. Note that the cam follower 161f is located on the back side of the downstream winding head 120 in FIG.
Further, when the head rotary cylinder 113 rotates, the swing angle at the time of winding of the final winding roll 140 and the position of the center of gravity of the entire member that swings together with the shank shaft 151 are determined by the initial winding roll of the upstream winding head 110. Therefore, the counterweight part 163 provided on the opposite side of the cam follower 161 of the cam lever 160 also has a different shape. Other configurations are the same as those of the upstream winding head 110.

At the second winding position 102, final winding tightening is performed in which the curled portion of the can lid 2 and the flange portion of the can body 1 that are wound in the initial winding are pressure-bonded. In the case of this embodiment, two final winding rolls 140 are arranged on the downstream winding head 120.
When the final winding is started, the two cam followers 161 are moved simultaneously along the locus Kc of the cam 111c formed so as to be the movement locus of the final winding, whereby the two final winding rolls 140 are moved. At the same time, the movement starts.
When the final winding roll 140 contacts the curled portion of the can lid 2 and revolves 1/2, the previous final winding roll 140 enters the curled region of the processing start point, and thereafter, always the previous final winding. The tightening roll 140 continues to revolve in the region in the middle of processing, and the amount of processing until the final winding is completed is close to the effective winding rotational speed.

Next, the can lid supply mechanism 180 will be described with reference to FIGS. 14 to 16.
The can lid supply mechanism 180 is disposed in the cutout portion 181 so that the can lid 2 put in from the loading portion 184 is stacked and received, and protrudes slightly to the inner peripheral side at the lowermost portion of the receiving hole 187. Three screw rolls 183 and a knife 189 integrally attached to the upper surface of the screw roll 183. Each of the screw rolls 183 has one oblique groove 186 in the vertical direction of the cylindrical outer peripheral surface, and the oblique groove 186 protrudes toward the inner peripheral side of the accommodation hole 187 when facing the accommodation hole 187 side. The drive shaft 188 connected to a drive source (not shown) is intermittently rotated by a drive toothed pulley integral with the drive shaft 188 via a timing belt 185 and a screw. The pulley with driven teeth of the roll 183 is configured to be intermittently rotatable in synchronization.

The can lid 2 thrown from the throwing portion 184 is stacked in the receiving hole 187, and is laminated by a knife 189 integrally attached to the upper surface of the screw roll 183 that slightly protrudes to the inner peripheral side at the bottom of the receiving hole 187. Maintained. When the three screw rolls 183 rotate, only one sheet of the lowermost can lid 2 is cut out by the integrally attached knife 189, and the uppermost portions of the respective slant grooves 186 simultaneously face the receiving hole 187 side. The can lid 2 is lowered in the three oblique grooves 186 of the screw roll 183 while the curled portion of the can lid 2 is supported, and falls to the transport unit 182 (shown in FIG. 2). Thus, when the can body 1 is supplied, the screw roll 183 rotates and sends the can lid 2 to the can transport pocket.
On the other hand, when the can body 1 is not supplied, the screw roll 183 does not rotate and does not supply the can lid 2. At that time, the knife 189 continuously maintains the laminated state without cutting out the can lid 2.
The transport unit 182 receives the can lids 2 separated one by one by the cutting unit 181 with a lid transport pin and a guide rail (not shown) provided on the upper surface around the can transport pocket of the transport turret 171, and the can lid supply position The transported can lid 2 is placed on the upper portion of the can body 1 held by the transport turret 171 at the can lid supply position 108.

Since the rotation of the screw roll is controlled intermittently in this way, it can also be used as a can lid stopper function that decides whether or not to send the can lid depending on the presence or absence of the can body, in the case of conventional continuous rotation There is no need for a stopper for feeding the can lid with an open / close shutter or the like.
In addition, since a timing belt and a toothed pulley are used for rotational drive, there are no problems such as noise, wear, lubrication such as lubrication, and oil leakage countermeasures such as seals as in conventional gear drive. The structure is simple and hygienic.

Next, a can lid winding method according to an embodiment of the present invention using the can lid winding device 100 configured as described above will be described.
As shown in FIG. 2, the can body 1 opened at the top is loaded from a carry-in conveyor 172 and transferred to a can transport pocket of a transport turret 171 that transports the can body 1 intermittently. The can body 1 in the can transport pocket is transported in the order of the can lid supply position 108, the first winding tightening position 101, the second winding tightening position 102, and the discharge position 103 by intermittent rotation.
First, at the can lid supply position 108, the can lid 2 conveyed by the conveyance unit 182 of the can lid supply mechanism 180 is placed on the opening portion of the can body 1 body. The can 1 is intermittently conveyed while being held in the can conveyance pocket of the conveyance turret 171 with the can lid 2 placed thereon, and reaches the first winding position 101.

At the first winding position 101, the can body 1 held in the can conveyance pocket of the conveyance turret 171 is pushed upward by a first lifter (not shown) and wound at the lower end of the head central shaft 112 provided on the upstream winding head 110. It is fixed by being sandwiched between the fastening chuck 142.
In a state where the can body 1 is fixed, the four initial winding rolls 130 arranged in the upstream winding head 110 revolve around the can body 1 and are pressed in the direction of the can body 1. An initial winding is performed in which the curled portion of the can lid 2 is fitted to the flange portion and wound.
When the initial tightening is finished, the first lifter (not shown) descends and simultaneously the can lid 2 is pushed downward by the knockout pad 143 while the can body 1 is lowered downward and is held in the can transport pocket of the transport turret 171 again. It is conveyed intermittently and reaches the second winding position 102.

At the second winding position 102, similarly to the initial winding, the can body 1 held in the can conveyance pocket of the conveyance turret 171 is pushed upward by a second lifter (not shown) and provided in the downstream winding head 120. The head is fixed by being sandwiched between the lower end of the head center shaft 112 and the winding chuck 142.
In a state where the can body 1 is fixed, the two final winding rolls 140 arranged in the downstream winding head 120 revolve around the can body 1 and are pressed in the direction of the can body 1 so that the initial winding tightening is performed. The final winding tightening is performed in which the flange portion of the can body 1 and the curled portion of the can lid 2 wound together are performed, and the double winding tightening is completed.
When the final winding is finished, the can body 1 is lowered downward, similarly to the first winding position 101, is held in the can transfer pocket of the transfer turret 171, and is intermittently transferred again, and reaches the can discharge position 103.
The discharge from the can discharge position 103 may be actively discharged by a conveyor, a turntable, a pusher, or the like, or may be discharged from below the can transfer pocket of the transfer turret 171 through an inclined surface or the like.

As described above, according to the can lid winding apparatus and the can lid winding according to the present invention, the upstream winding head and the downstream winding head are separately provided, so that the winding can be performed simultaneously. Processing time can be shortened by shortening the waiting time of each winding roll generated.
Further, in this embodiment, the initial winding rolls are arranged more than the final winding rolls, so that it is possible to shorten the initial winding processing time that generally requires more rotation than the final winding rolls. it can.
More specifically, since the initial winding rolls are four and the final winding rolls are two, the processing time of the initial winding and the final winding that require about twice the effective winding rotational speed is the same. Alternatively, the processing efficiency can be improved by minimizing the idle time of the upstream and downstream winding heads.
In the embodiment of the present invention, the processing time is about 1/3 compared with the conventional case of winding with a winding head (two initial winding rolls and two final winding rolls are arranged in one head). Can be shortened.

As another embodiment of the present invention, when three initial winding rolls 130 are arranged in the upstream winding head 110, the initial winding rolls 130 are arranged at intervals of 120 °, and the three cams 111 are arranged in a 120 ° phase. It is desirable to change the position. In this case, as described above, the processing amount per revolution is 済 む.
Further, when six initial winding rolls 130 are arranged in the upstream winding head 110, the initial winding rolls 130 are arranged at intervals of 60 °, and three cams 111 corresponding to the two opposing rolls are set to 120. ° It is desirable to change the phase. In this case, as described above, the processing amount per revolution is ６.
Similarly, when the five initial winding rolls 130 are arranged in the upstream winding head 110, the initial winding rolls 130 are arranged at equal intervals of 72 °, and the five cams 111 are arranged by changing the phase by 72 °. It is desirable to do. In this case, the processing amount per revolution is only 1/5.
When two initial winding rolls 130 are arranged on the upstream winding head 110, the configuration is the same as that of the above-described downstream winding head.

Even in the configuration in which the initial winding rolls 130 are arranged as described above, the same operational effects can be obtained as in the case where the four initial winding rolls 130 are arranged in the upstream winding head 110. In other words, by winding the effective winding speed of the above-described initial winding with two or more initial winding rolls, the initial winding time is shortened compared to the conventional method, and the processing per unit time is further increased. It is possible to increase the speed.
Note that the number of cams 111 used is not limited to the above-described content, and the design can be changed within the allowable range of the allocation angle.

In the above-described embodiment, the initial winding head has four initial winding rolls and the final winding head has two final winding rolls. However, depending on the required winding conditions, It is also possible to perform a preliminary process before the initial winding process using the preliminary winding roll as the winding head and an additional process after the final winding process using the additional winding roll as the final winding head.
Further, regarding the number of winding heads, an arbitrary number of winding heads such as a third winding head can be arranged in the middle or front and back of the upstream winding head 110 and the downstream winding head 120. It is also possible to cause the arbitrary winding head to perform a preliminary process and an additional process.
It is also possible to adjust the processing speed of the other head by reducing the processing speed of the other head in accordance with the processing speed of the head that requires time for winding. As a result, the initial winding time and the final winding time are equal or nearly equal, the idle time of the upstream winding head and the downstream winding head can be minimized, and the processing efficiency can be improved.

  In the can lid winding device of the present invention, as described above, the initial winding roll is disposed in the upstream winding head, the final winding roll is disposed in the downstream winding head, and the upstream winding head operates. In the first winding position, initial winding is performed by the initial winding roll, and in the second winding position where the downstream winding head is operated, final winding is performed by the final winding roll. Since the winding head and the downstream winding head have the same configuration, various winding rolls can be applied to each winding head by appropriately setting the shape and dimensions of the cam profile, shank lever, and counterweight. The arrangement, number, combination, and winding sequence of winding rolls can be freely selected, and not only metal cans but also plastic resin containers such as PET, paper containers, etc. Parts can be applied to seaming of various containers with.

DESCRIPTION OF SYMBOLS 1 ... Can body 2 ... Can lid 100 ... Can lid winding apparatus 101 ... 1st winding clamping position 102 ... 2nd winding clamping position 103 ... Can discharge position 108 ... Can lid supply position 110 ... Upstream winding head 111 ... Cam 112 ... Head center shaft 113 ... Head rotating cylinder 114 ... Can lid pressing shaft 115 ... Upper flange 116 ... Lower Flange 117 ... Shank support part 118 ... Cover 119 ... Can lid pressing spring 120 ... Downstream winding head 130 ... Initial winding roll 131 ... Roll central axis 140 ... Final winding Clamping roll 141 ... Roll center shaft 142 ... Winding chuck 143 ... Knockout pad 150 ... Shank portion 151 ... Shank shaft 152 ... Shank lever 153 · Shank fixing member 154 ··· Lower end portion 155 ··· Upper end portion 160 ··· Cam lever 161 ··· Cam follower 162 ··· Cam pressing spring 163 ··· Counterweight portion 170 ··· Container transport mechanism 171 Transport turret 172 Carry-in conveyor 180 Can lid supply mechanism 181 Cut-out section 182 Transport section 183 Screw roll 184 Loading section 185 Timing belt 186 .. Diagonal groove 187 ... receiving hole 188 ... drive shaft 189 ... knife

Claims (11)

A can lid winding device in which the winding head revolves the winding roll around the container and performs double winding by pressing the winding roll toward the container,
A transport turret that transports the container intermittently;
The winding head includes an upstream winding head and a downstream winding head;
The upstream winding head and the downstream winding head are arranged on one of the transport turrets;
The winding roll includes at least an initial winding roll and a final winding roll,
The initial winding roll is disposed on the upstream winding head;
The can lid winding device, wherein the final winding roll is disposed in the downstream winding head. A can lid winding device in which the winding head revolves the winding roll around the container and performs double winding by pressing the winding roll toward the container,
The winding head includes an upstream winding head and a downstream winding head;
The winding roll includes at least an initial winding roll and a final winding roll,
The initial winding roll is disposed on the upstream winding head;
The final winding roll is disposed on the downstream winding head;
The winding head includes a pressing mechanism having a shank portion that supports the winding roll in a swingable manner, a cam lever extending from the shank portion, and a cam follower attached to the cam lever.
The pressing mechanism supports the winding roll so that it can rotate and can stop or advance,
The cam lever, can lid seaming apparatus according to claim Rukoto that having a counterweight portion opposite the cam follower. 3. The can lid winding apparatus according to claim 1 , wherein two to six of the initial winding rolls are arranged on the upstream winding head. 4. The can lid winding apparatus according to any one of claims 1 to 3 , wherein a larger number of the initial winding rolls are arranged than the final winding rolls. Four initial winding rolls are arranged on the upstream winding head,
The can lid winding apparatus according to any one of claims 1 to 4 , wherein two final winding rolls are arranged on the downstream winding head. The container conveying mechanism which conveys a container intermittently toward the 2nd winding clamping position where the said downstream winding head act | operates from the 1st winding clamping position where the said upstream clamping head act | operates is provided. The can lid winding device according to any one of claims 1 to 5 . There are an input part for supplying a plurality of can lids, a cutout part for taking out the lowermost one of the input can lids, and a transport part for transporting the extracted can lids to the can lid supply position. And
7. The can according to claim 6 , wherein the cut-out portion includes a can lid supply mechanism having three screw rolls provided with one oblique groove in a vertical direction of a cylindrical outer peripheral surface that rotates intermittently. Lid tightening device. A can lid winding method in which a winding roll is revolved around a container and pressed in the direction of the container to perform double winding,
A transport turret that transports the container intermittently;
The winding head includes an upstream winding head and a downstream winding head;
The upstream winding head and the downstream winding head are arranged on one of the transport turrets;
The winding roll includes at least an initial winding roll and a final winding roll,
In the first winding position where the upstream winding head operates, initial winding is performed by the initial winding roll,
A can lid winding method, wherein the final winding is performed by the final winding roll at a second winding position where the downstream winding head operates. 9. The can lid winding method according to claim 8 , wherein in the initial winding, two to six initial winding rolls are pressed simultaneously. 10. The can lid winding method according to claim 8, wherein the initial winding time and the final winding time are equal or substantially equal. The can lid winding method according to any one of claims 8 to 10, further comprising a leveling step before the end of the initial winding and the final winding.

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