JP4450159B2 - Mandrel rotation control device - Google Patents

Description

The present invention relates to a mandrel rotation control device , and more particularly to a mandrel rotation control device that presses a mandrel of a device that performs processing such as printing, painting, and label sticking on the surface of a cylindrical article such as a can.

  For example, the processing steps such as painting, coating, printing, or labeling on the outer peripheral surface of a two-piece cylindrical can are performed by fitting and supporting the cylindrical can on a mandrel, and a rotationally driven coating roll, coater roll, blanket roll, Alternatively, when the cylindrical can comes into frictional contact with a labeling roll or the like (hereinafter, these are referred to as a processing rotary roll), a treatment corresponding to each purpose is performed on the surface of the can body. In such an apparatus, when the can supported by the mandrel comes into contact with the rotating processing roll that is rotationally driven, if the speed difference between the two is large, the impact at the start of contact is large and the rotation of the mandrel is rotating for processing. It is difficult to perform accurate processing without accurately following the roll. For this reason, the mandrel is press-pinned to the rotational speed at the time of frictional contact before the start of contact. Conventionally, a press pin section and a processing section for performing printing or the like are provided on the outer peripheral surface of the roll of the processing rotary roll, and the press pin section of the processing rotary roll first performs the press pin by frictional contact with the mandrel, and then the processing section. Is subjected to processing such as printing by frictional contact. In such an apparatus, a belt in which a belt for transmitting rotation of the blanket cylinder to the mandrel is wound around the outer periphery of the blanket cylinder so as to surely perform the press pin is proposed (patent) Reference 1). Therefore, in the conventional method, when the processing rotary roll is a blanket cylinder, for example, the image transfer portion and the press pin contact portion must be provided on the blanket cylinder, and the diameter of the processing rotary roll is reduced. There was a problem that had to be enlarged.

  As another method, for example, as shown in FIG. 4, from a predetermined section before the start of frictional contact between the mandrel 41 disposed on the outer periphery of the mandrel wheel 40 at an equal pitch and the processing roll 42 to the end of the frictional contact. When the mandrel passes through this section, the mandrel is press-pinned by bringing the press pin belt 43 interlocked with the processing rotary roll 42 into frictional contact with the mandrel shaft. In any of the above conventional methods, the press pin forcibly rotates the mandrel with a belt that is wound around the outer periphery of the processing rotation roller, and the press pin and the rotation at the time of processing are rotated at the same peripheral speed. .

JP-A-9-267466

In this conventional method, since the rotation is caused by friction between the belt and the mandrel, it is difficult to reliably rotate, the rotation of the mandrel is unstable and the belt is worn during use, and the rotation is further prevented. There are problems such as stability. Since the belt is disposed in the vicinity of the outer peripheral surface of the processing roll and the mandrel wheel, there are problems that the belt becomes an obstacle and that maintenance such as adjustment of the belt tension is troublesome.
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a mandrel rotation control method and apparatus capable of reliably rotating a mandrel and stably pressing the mandrel instead of a conventional press pin mechanism using a belt.

The mandrel rotation control device of the present invention that solves the above-described problems is a predetermined treatment on the surface of the cylindrical article by frictional contact with the mandrel for fitting and supporting the cylindrical article and the outer peripheral surface of the cylindrical article supported by the mandrel. A mandrel rotation control device in a processing device comprising a combination with a processing rotating roll for applying a mandrel wheel, a mandrel wheel that revolves while supporting the mandrel so as to rotate, and a frictional contact with an outer peripheral surface of a cylindrical article fitted to the mandrel The mandrel shaft includes a processing rotating roll arranged in a possible manner, and the cylindrical article supported by the mandrel at least from a predetermined upstream position of the tracking section where the cylindrical article is in frictional contact with the processing rotating roll to a tracking section start position. The mandrel is pressed by frictional contact with the processing roll in the tracking section. There will have a pre-rotation means comprising so as to rotate, the preliminary rotation means, the press pin section from a predetermined position upstream of at least the tracking section to the tracking section start position, along the revolution path of the mandrel shaft Rack-shaped fixed gears disposed on the mandrel shaft, and a preliminary rotation gear provided on the mandrel shaft. The preliminary rotation gear is transmitted to the mandrel shaft via a cam clutch provided on the mandrel shaft, and is tracked. When the rotation speed of the mandrel shaft exceeds the rotation speed of the preliminary rotation gear in the section, transmission from the preliminary rotation gear to the mandrel shaft is cut off .

The rack-shaped fixed gear is arranged over a certain section downstream of the press pin section, the tracking section, and the tracking section, and after the tracking section is finished, the rotation speed of the mandrel meshes with the rack-shaped fixed gear and the preliminary rotation gear. When the rotation speed is reduced to the rotation speed, the rotational force of the preliminary rotation gear is transmitted to the mandrel shaft, and the mandrel is post-spinned at the same rotation speed as the press pin section.

Et al is, the tracking section, the mandrel is displaced in recessed circular track along the circumferential surface of the rotating roll process from the circular arc track, rotate at the same peripheral speed rotating roll and pressure-contact process by a fixed interval, wherein The rack-shaped fixed gear is configured to be deformed into a concave arc shape in synchronization with the mandrel trajectory, so that the tracking section can be made long and the processing can be performed reliably.

  In the present invention, the cylindrical article that is the article to be treated and the mode of treatment are not particularly limited, but the film label sticking apparatus for sticking the film label to the outer peripheral surface of the can as the cylindrical article is printed. The present invention can be suitably applied to a mandrel preliminary rotation control device of a processing device such as a printing device, a coating device for coating, or a coater for coating.

  According to the present invention, since the mandrel can be surely press-pinned at a predetermined rotational speed before the processing rotary roll comes into frictional contact with the mandrel, the load and impact at the start of frictional contact with the processing rotary roll are reduced. The mandrel can be stably and reliably rotated by frictional contact with the processing rotary roll, and the cylindrical article can be satisfactorily processed such as sticking of a film label. Further, during the frictional contact between the processing roll and the mandrel, the rotation of the mandrel releases the forced rotation at the time of the press pin and is driven only by the frictional force between the processing rotary roll and the mandrel. The rotation can be surely followed by the rotation of the processing rotary roll, and there is no fear of forced slippage between the cylindrical article surface and the processing rotary roll surface. Further, since no belt transmission mechanism is used to press the pins, there is no risk of rotation failure due to belt wear or the like, and maintenance is easy. Further, by adopting the mechanism of claim 5 or 6 as a mechanism for pressing the mandrel, the mandrel can be reliably rotated only in an arbitrary section by a compact mechanism, and the processing rotating roll During frictional contact with the mandrel, the interlock can be reliably released.

Hereinafter, the present invention will be described in detail with reference to the embodiment shown in FIGS.
1 to 3 show an embodiment of the present invention, and this embodiment is a film label sticking apparatus (Japanese Patent Laid-Open No. 2001-179830) for sticking a label to the surface of a can body previously proposed by the present applicant. The case where it applies to is shown.
In the figure, reference numeral 1 denotes a mandrel wheel, and a mandrel support arm 2 (FIG. 2) that is radially expandable and contractable on a rotation main shaft (not shown) is radially arranged at a predetermined pitch. The mandrel shaft 5 of the mandrel 3 is rotatably supported by a pair of bearings 6 and 6 in parallel with the rotation main shaft. A preliminary rotation gear 7 is rotatably fitted to the base portion of the mandrel shaft 5 so that the preliminary rotation gear 7 meshes with a rack-like fixed gear 10 formed on the outer peripheral surface of a cam plate 8 described later. It has become. The end of the mandrel shaft 5 is a mandrel 3 to which the can 30 is fitted, and an air port 4 is opened at the end of the mandrel shaft 5 through the air passage 16 disposed through the mandrel shaft. The can is communicated with the air control source, the can is fitted and held by vacuum, and the can is discharged from the mandrel by air pressure when discharged. Further, a can receiving pocket 11 and an air nozzle 9 are coaxially provided at the tip of the mandrel support arm 2 so as to face the mandrel 3, and a can body supplied from a can supply turret (not shown) is received in the pocket 11. The can body is supplied to the mandrel 3 by air pressure at a predetermined timing. Cam followers 12 are provided on both sides of the mandrel support arm 2 (left and right sides in FIG. 1), and the cam followers are fitted in cam grooves 13 formed on a pair of cam plates 8 on both sides fixed to the frame. is doing.

  The cam plates 8 are arranged on both sides so as to sandwich the mandrel wheel 1. When the mandrel wheel 1, that is, the mandrel support arm 2 rotates as the main shaft rotates, the mandrel support arm 2 is restrained by the cam groove 13, It rotates (revolves) while being displaced in the radial direction of the rotating body according to the shape of the groove. The cam groove 13 is endless but not completely circular. As clearly shown in FIG. 1, the film label attaching section (tracking section) B is recessed in the radial direction along the attaching roll 20 and attached. The tracking angle with the roll is increased. Thereby, a film label sticking section can be formed long, and the reliable sticking in a high-speed line is enabled. Further, since the mandrel support arm 2 is supported by a double cam structure composed of cam grooves 13 and 13 and cam followers 12 and 12 of the cam plate 8 provided on both sides thereof, the conventional cantilever type support is provided. Rigidity is increased compared to the structure, and high adhesion pressure is obtained.

  As described above, the cam plates 8 and 8 have the endless cam groove 13 formed on the side facing the mandrel wheel, and the preliminary rotation gear 7 fixed to the mandrel shaft 5 on the upper surface of one cam plate. A rack-like fixed gear 10 that meshes with is arranged. The rack-shaped fixed gear 10 has at least a friction contact section with the sticking roll 20 so that the can fitted to the mandrel can rotate the mandrel shaft 5 before starting the frictional contact with the sticking roll 20. It is necessary to dispose over a range from a predetermined position upstream of the (tracking section) to the sticking roll and frictional contact. In the present embodiment, the press pin section A is provided on the upstream side of the tracking section B in this way, and the rack-shaped fixed gear 10 is disposed over the predetermined section on the downstream side beyond the tracking section, A post-spin section C was formed. Each of the press pin section A and the post spin section C is preferably in a range of about 10 to 30 °, and in the embodiment shown in the figure, a case where each is set to about 20 ° is shown.

  Therefore, while the mandrel shaft 5 passes through the section where the rack-shaped fixed gear 10 is disposed, the pre-rotation gear 7 provided on the mandrel shaft meshes with the rack-shaped fixed gear 10 so that the mandrel 3 rotates. However, in this embodiment, when the can fitted to the mandrel starts frictional contact with the film adhering roll 20, that is, when it reaches the tracking section, the mandrel shaft due to the meshing of the preliminary rotation gear 7 and the rack-shaped fixed gear 10 is achieved. The transmission of the rotational force to 5 is cut off, and the rotation of the mandrel shaft 5 follows the rotation of the sticking roll due to the frictional contact caused by the frictional contact with the sticking roll. It was devised so as not to occur. As a mechanism for this purpose, a cam clutch 15 is provided between the preliminary rotation gear 7 and the mandrel shaft 5. The cam clutch is a one-way rotation clutch, and when the rotational speed on the driven side is larger than the rotational speed on the driving side, a known mechanism that interrupts transmission from the driving side can be adopted, and the configuration is not particularly limited. In the present embodiment, by setting the rotation speed of the mandrel shaft by the meshing ratio between the rack-shaped fixed gear 10 and the preliminary rotation gear 7, that is, the press pin rotation speed, slightly lower than the rotation speed of the mandrel shaft in the tracking section, Until the tracking section is reached, the mandrel 3 is press-pinned by meshing with the rack-shaped fixed gear 10 and the pre-rotating gear 7, and in the film attaching section, it is rotated by the frictional force of the attaching roll and passes the tracking section. Again, the impact due to the rapid speed fluctuation of the mandrel is alleviated by post-spinning at a lower speed than that at the time of sticking only for a certain interval. However, forced rotation after passing through the tracking section is not always necessary and can be omitted.

The mandrel rotation control device of the present embodiment is configured as described above and operates as follows.
As disclosed in Japanese Patent Application Laid-Open No. 2001-179830, the surface of the sticking roll 20 has a film label suction surface 21 and holds the film label attached to the outer peripheral surface of the body of the can body by suction. Rotate at a constant speed at a predetermined rotation speed. On the other hand, the mandrel wheel 1 also rotates at a constant speed in synchronization with the sticking roll 20, but the mandrel 3 supported by the mandrel support arm 2 of the mandrel wheel 1 is in a free state and reaches the press pin section A. The can body 30 supplied from the can receiving pocket 11 is externally fitted on the upstream side, and the can body 30 is held by the vacuum from the air passage 16 so as to rotate integrally with the mandrel. When the mandrel wheel 1 rotates in this state and the mandrel 3 reaches the place where the rack-shaped fixed gear is disposed, the pre-rotation gear 7 provided on the mandrel shaft revolves while meshing with the rack-shaped fixed gear 10. By doing so, the rotational force is transmitted to the mandrel shaft 5 via the cam clutch 15, and the mandrel 3 starts the press pin. In this state, the rotation speed of the mandrel 3, that is, the can body is defined by the meshing ratio between the preliminary rotation gear 7 and the rack-shaped fixed gear 10, and can be arbitrarily set. In this embodiment, the rotational speed is set slightly lower than the rotational speed in frictional contact with the sticking roll. The rotation speed of the press pin is 90 to 100%, preferably 95 to 99% of the processing rotation speed in the tracking section. If the rotation speed of the press pin is 90% or less of the processing rotation speed, the effect of the press pin is low, and if it exceeds 100%, it will be forcibly decelerated at the start of processing, and the surface of the can body and the surface of the sticking roll A strong frictional force works between them and causes inconvenience. Further, if it is 100%, it is difficult to switch between the press pin and the driving mechanism for processing rotation, so 99% or less and 95% or more are desirable.

  When the mandrel 3 is given a predetermined number of rotations by the gear mechanism in the press pin section A and arrives at the tracking section B, the mandrel 3 receives a rotational force by the frictional contact of the sticking roll 20 with the can 30 and the sticking roll. The surface and the outer peripheral surface of the can body rotate at a constant speed. As a result, the mandrel shaft rotates at a higher rotational speed than that at the time of the press pin, so that the connection between the cam clutch and the pinion shaft is disconnected, and transmission of the rotational force due to the engagement between the rack-shaped fixed gear and the preliminary rotation gear is shielded. The mandrel operates exclusively by frictional contact with the sticking roll and rotates following the sticking roll accurately. Thereby, the film label adsorbed and held on the outer peripheral surface of the sticking roll can be accurately stuck on the outer peripheral surface of the can body.

  After the tracking section, the frictional contact between the can body fitted to the mandrel and the sticking roll 20 is released, and the rotation speed of the mandrel decreases to the rotation speed due to the engagement between the rack-shaped fixed gear and the preliminary rotation gear. Then, the cam clutch is activated again, the rotational force of the preliminary rotation gear is transmitted to the mandrel shaft, and the mandrel starts post-spinning at the same rotational speed as that of the press pin. As a result, the can attached with the film label does not stop rotating immediately and continues to rotate at a rotation speed lower than the processing speed for a certain section, so there is no impact when the sticking roll leaves, A film label can be attached.

  As mentioned above, although one Embodiment at the time of applying the present invention to the device which sticks a film label on the outer peripheral surface of a 2 piece can body was shown, the rotation control method of the mandrel and the device of the present invention are based on the above-mentioned embodiment. Not limited to the outer peripheral surface of the cylindrical article, for example, a printing device that performs printing, a coating device that performs painting, a processing device such as a coater that performs coating, and the cylindrical article are not limited to cans, but various cylindrical articles such as bottomed or It can be applied to a case where a bottomless metal tube, paper tube, or synthetic resin tube is fitted to a mandrel to perform various treatments on the surface thereof.

It is a principal part schematic diagram which shows the outline of embodiment at the time of applying the rotation control apparatus of the mandrel which concerns on this invention to a film label sticking apparatus. It is the principal part side surface schematic. It is a principal front schematic diagram showing the operation. It is the schematic which shows the press pin mechanism of the conventional mandrel.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mandrel wheel 2 Mandrel support arm 3 Mandrel 5 Mandrel shaft 7 Preliminary rotation gear 8 Cam plate 10 Rack-shaped fixed gear 11 Can receiving pocket 12 Cam follower 13 Cam groove 15 Cam clutch 20 Adhesion roll 21 Film label adsorption surface

Claims (4)

Mandrel rotation in a processing apparatus comprising a combination of a mandrel for fitting and supporting a cylindrical article and a rotating roll for treatment that performs a predetermined treatment on the surface of the cylindrical article by frictional contact with the outer peripheral surface of the cylindrical article supported by the mandrel A control device, comprising a mandrel wheel that supports and revolves the mandrel so as to rotate, and an outer peripheral surface of a cylindrical article fitted to the mandrel, and a processing rotary roll disposed so as to be in frictional contact with the mandrel. The mandrel shaft is press-pinned between a predetermined upstream position of a tracking section where the cylindrical article to be supported is in frictional contact with the processing rotary roll and a tracking section start position, and the processing rotary roll is in contact with the processing rotary roll in the tracking section. mandrel axis frictional contact is a pre-rotation means comprising so as to rotate,該予The rotating means includes a rack-shaped fixed gear disposed along a revolution path of the mandrel shaft at least in a press pin section from a predetermined upstream position of the tracking section to a tracking section start position, and a spare provided on the mandrel shaft. The preliminary rotation gear is transmitted to the mandrel shaft via a cam clutch provided on the mandrel shaft, and the rotation speed of the mandrel shaft exceeds the rotation number of the preliminary rotation gear in the tracking section. And a mandrel rotation control device characterized in that transmission from the preliminary rotation gear to the mandrel shaft is cut off . The rack-shaped fixed gear is arranged over the press pin section, the tracking section, and a fixed section downstream of the tracking section, and the mandrel rotation speed is meshed between the rack-shaped fixed gear and the preliminary rotation gear after the end of the tracking section. 2. The mandrel rotation control device according to claim 1 , wherein the rotational force of the preliminary rotation gear is transmitted to a mandrel shaft when the rotation speed is reduced to a mandrel shaft, and the mandrel is post-spinned at the same rotation speed as the press pin section . In the tracking section, the mandrel is displaced from the circular arc track to a concave circular arc track along the circumferential surface of the processing rotary roll, and is pressed against the processing rotary roll for a certain interval and rotated at the same peripheral speed. The mandrel rotation control device according to claim 1 , wherein the mandrel is deformed into a concave arc shape in synchronization with the mandrel trajectory. The cylindrical article is a can body, and the rotating roll for processing is any of a film label attaching roll for attaching a film label, a transfer roll for printing, and a coating roller for performing coating or coating on the outer peripheral surface of the can body. The mandrel rotation control device according to any one of claims 2 to 3 .

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