JP2007061869A - Method and device for fitting interior can for double drum - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and a device capable of reliably seaming a flange of an interior can around a barrel curl of an exterior can, and reducing the manufacturing cost with a simple device. <P>SOLUTION: An inversely U-shaped neck-in flange 12 with a lower edge being seamed slightly inwardly which is formed on an upper edge of an opening of an interior can 1 in advance is covered over a barrel curl 14 of an exterior can 2. An inner face of an upper half of the neck-in flange is tightly attached to a face of an upper half of the barrel curl of the exterior can to form a substantially disk-shaped one, and an edge of a rotary piece 6 rotating around the axis of rotation substantially parallel to the axial direction of the exterior can is abutted thereon, and a lower half of the neck-in flange is pressed against a lower face of the barrel curl. Then, a wave-shaped portion 15 generated by the contraction of the neck-in flange is pressed by a press roller 9 and tightly attached to a lower face of the barrel curl. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

TECHNICAL FIELD The present invention relates to a method and apparatus for mounting an internal can of a double drum can used by mounting an internal can in an external can.
About.

  For drums used mainly to store liquids such as ink and oil, powders, or granules, the cans that have been widely used in the past are used as exterior cans, and a thin interior can is attached inside. There is a double drum can (see, for example, Patent Document 1), and it is easy to recycle used exterior cans and to dispose of residual deposits inside interior cans reliably and easily. There is an advantage in that the use of a double drum can as a raw material and product storage means is increasing.

  As shown in FIG. 7, the double drum can described above is simply a structure in which the outward flange 52 of the inner can 51 is simply hung on the body curl 54 of the outer can 53, and a metal band 55 is wound around the outer periphery of both of them. (For example, see Patent Document 2).

  However, it takes time and effort to weld the metal band, and the mounting cost increases. Since the metal band is a separate member from the drum, the material cost cannot be ignored, and the drum can also be used for disposal after use. There is a problem that it must be considered separately from the main body, and there are cases where welding marks are left on the outer can when the metal band is welded, and correction is required when the outer can is recycled.

  Therefore, the applicant has previously developed an internal can for double drum cans in which the metal band is not required (see Patent Document 3), and has been widely put into practical use.

  The interior can is configured so that the outward flange of the interior can surround the outer curl of the exterior can, and the interior can itself is fixed to the exterior can by entraining the exterior curl of the exterior can. A fixing means for a separate member such as a band is not required, and a reduction in manufacturing cost and processing cost after use can be achieved.

The interior can having the above-described configuration is a state in which the exterior can and the interior can are rotated together around the axis while being set in the exterior can, using an appropriate jig from the inside of the opening upper edge of the interior can. It is only necessary to plastically deform along the circumference of the body curl, but there is a need for the development of a method and apparatus that can more easily and reliably engage the inner can and the outer can to reduce the manufacturing cost of the double drum can. It was.
Microfilm of actual application No. 57-119552 (pages 1 to 5, FIGS. 1 and 2) Utility Model Registration No. 2592881 (Pages 1-3, FIGS. 1-4) Japanese Patent Laying-Open No. 2005-162220 (Pages 1-5, FIGS. 1-7)

  An object of the present invention is to provide a method and an apparatus that can reliably wind the flange of the inner can around the trunk curl of the outer can, and that can reduce the manufacturing cost with a simple apparatus.

  In order to solve the above-mentioned problems, the method according to the present invention is a method for mounting an internal can of a double drum can in which a bottomed cylindrical interior can having an open top is installed in a bottomed cylindrical exterior can having an open top. In this case, the upper end edge of the interior can is previously curled into a reverse U-shaped cross section from the upper end of the opening to the outside, and the lower end edge is slightly wound inwardly. Forming an outward neck-in flange having a gap substantially the same as or slightly wider than the width of the body curl of the outer can, and inserting the inner can into the outer can to attach the neck in flange to the body curl of the outer can Cover the neck-in flange with a groove with an inverted U-shaped cross-section formed on the bottom surface of the press die, so that the upper half inner surface of the neck in flange is in close contact with the upper half surface of the body curl of the outer can. Disc shape and almost the axial direction of the outer can A rotating piece that rotates around the rotation axis forming a row is moved toward the center in the radial direction while rotating and moving relative to the outer can on a circumferential track concentric with the outer can. The lower half of the neck-in flange is pressed against the lower surface of the body curl by bringing the end edge of the rotary piece into contact with the edge of the neck-in flange located below, and then in the radial direction of the outer can in a cylindrical shape A pressing roller that rotates about an axis substantially orthogonal to the axial direction of the outer can is moved from the lower side of the body curl to the upper side on a circumferential track concentric with the outer can. The wave-like portion generated at the edge portion is pressed and brought into close contact with the lower surface of the body curl.

  Further, the surplus meat portion generated by the pressing of the wave-shaped portion is extended outward by pressing by the pressing roller, and a gap is formed between the body curl and the lower half of the neck-in flange.

  Further, the rotary piece is configured to rotate around a rotation axis that forms 7 to 9 degrees outwardly with respect to the central axis of the outer can.

  The apparatus according to the present invention is an interior can mounting device for a double drum can in which a bottomed cylindrical interior can whose top is also opened is installed in a bottomed cylindrical exterior can whose top is open. A pressing die that presses the outer can downward in the axial direction to press the upper half of the opening edge against the body curl, a fixing means for holding and fixing the outer can containing the inner can, and a substantially disk shape that is substantially vertical Rotating around a rotational axis and moving toward the center in the radial direction while rotating relative to the outer can on a circumferential track concentric with the outer can, and positioned below the body curl A rotating piece that presses the lower half of the neck-in flange against the lower surface of the body curl by bringing the end edge of the rotating piece into contact with the end side of the neck-in flange, and the outer can in a cylindrical shape in the radial direction of the outer can The axial direction of Rotates around a substantially orthogonal axis and is moved upward from below the body curl on a circumferential track concentric with the outer can, and presses the wave-like part generated at the edge as the neck-in flange is reduced in diameter. Then, the structure includes a pressing roller that is brought into close contact with the lower surface of the body curl, and a rotation driving unit that rotates the rotating piece and the pressing roller relative to the outer can.

  Further, the fixing means is configured by a support plate that supports the bottom of the outer can so as to be rotatable about an axis, and the press mold, and the press mold is rotated about the axis by the rotation driving means. As a thing.

  Further, the rotary piece is configured to rotate around a rotation axis that forms 7 to 9 degrees outwardly with respect to the central axis of the outer can.

  According to the present invention, after the upper half of the flange of the inner can is brought into close contact with the periphery of the upper half of the body curl of the outer can by a press die, the end of the flange is brought into contact with the lower half of the body curl by the rotary piece. Since the wavy portion of the flange end side that is deformed along the deformation is leveled by the pressing roller, there is almost no error caused by the deformation at the flange end side of the interior can, and the flange of the interior can The end side part adheres securely to the lower surface of the trunk curl.

  Therefore, it is possible to eliminate the danger that the end of the inner can rises and injures the hand of the operator who operates the drum can, and the risk that the engagement force between the inner can and the outer can decreases. it can.

  In addition, the process of closely attaching the neck-in flange of the inner can around the trunk curl of the outer can includes three steps: pressing the upper half with a press die, winding the lower half with a rotary piece, and adhering the end with a pressing roller. Since it is divided into processes, the movement when driving the press die, rotating piece and pressing roller is only in one axial direction. For example, a jig is placed inside the open end of the inner can, and this jig is placed around the body curl. Compared to controlling the movement of the jig when it is configured to be deformed toward the outside, a much simpler configuration is sufficient, and the equipment cost and maintenance cost for installing the interior can Can be greatly reduced.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the apparatus according to the present invention will be described below in detail based on specific examples shown in the accompanying drawings.
FIG. 1 shows a schematic configuration diagram of an apparatus according to the present invention, and a press mold that rotates concentrically with the rotating table above a rotating table 4 on which a can 3 in a state where an inner can 1 and an outer can 2 described later are set is placed. 5, the lower part of the can 3 is held by a chuck 4 b provided on the upper surface of the turntable 4, the upper end of the can is pressed by a press die 5, and the press die 5 is not shown around the shaft 5 a. These press dies 5 and turntable 4 constitute a fixing means.

  The rotary table 4 is driven around a shaft 4a in accordance with the rotary driving of the press mold that also serves as a rotary drive means.

  The press die 5 has a circular shape concentric with the shaft 5a, and has a molding groove 5b whose cross-sectional shape is an inverted U shape. By pressing the opening edge of the can 3 by the molding groove, the press die 5 is internally provided. The upper half of the neck-in flange of the can 1 is pressed against the upper half of the body curl of the outer can 2, and details will be described later.

  A rotary piece 6 is provided outside the press die 5 so that the rotary piece can freely rotate around a shaft 6a. An arm 7 for supporting the rotary piece is expanded and contracted by an actuator 8. Thus, the rotating piece is moved forward and backward in the radial direction of the can 3 toward the center of the can 3.

  A pressing roller 8 facing the molding groove 5b is provided below the press die 5, and the pressing roller 9 can freely rotate around a shaft 9a attached to the tip of the arm 10. The arm 10 can be moved up and down by driving the actuator 11.

  In FIG. 1, the rotary piece 6 and the pressing roller 9 are disposed at a position that forms an angle of 180 ° around the axis of the can 3, but it is not necessary to be particularly restricted by this positional relationship.

Next, the mounting method of the interior can according to the present invention will be described together with the operation of the apparatus of the present invention configured as described above.
First, the upper end edge of the bottomed cylindrical interior can 1 having an open upper portion is formed in an inverted U-shaped cross section from the upper end of the opening to the outside as shown in FIG. The neck-in flange 12 is formed by curling into a shape in which the lower edge is slightly wound inside.

  The neck in flange 12 is formed such that the width Wa of the gap between the lower edge of the inner can 12 and the body 13 of the interior can is substantially the same as or slightly wider than the width Wb of the body curl 14 of the exterior can 2. It is configured so that it can be easily set in the outer can.

  The can 3 in which the internal can 1 is set in the external can 2 is set in the apparatus of the present invention described above, and the lower part of the can is gripped and fixed on the turntable 4 by the chuck 4b. After the centering is performed, the press die 5 is lowered as shown in FIG. 3 to fit the molding groove 5b around the neck in flange 12, and the upper half of the neck in flange 12 is connected to the upper half of the body curl 14. While pressing around the part, the can is fixed in the vertical direction.

  After fixing the can 3 as described above, the press die 5 is rotationally driven to rotate the can around the axis. In this state, the actuator 8 is driven to extend the arm 7, whereby the rotary piece 6 is The upper edge of the rotary piece comes into contact with the lower surface of the neck-in flange 12 and pushes up the lower surface of the neck-in flange while following the rotation of the can. And move toward the center of the can.

The upper edge of the rotary piece 6 is rounded, and the rotary shaft 6a of the rotary piece 6 is inclined to the upper axis of the can 3 upwardly by 7 to 9 °. The neck-in flange and the upper edge of the rotating piece can be smoothly contacted.
Further, the rotary piece 6 may have a pressing force so that the rotary piece is directed upward by an appropriate biasing means such as a compression spring.

  At this time, since the edge portion of the neck-in flange 12 is pushed inward to reduce the diameter, the surplus meat with the reduced diameter of the neck-in flange is waved, and the corrugated portion 15 is formed on the edge portion. However, the wavy portion 15 is removed by the action of the next pressing roller 9.

  Thus, the pressing roller 9 is moved upward by the drive of the actuator 11, contacts the lower surface of the neck-in flange 12, is driven by the rotation of the can 3, and smoothes the wavy portion generated in the neck-in flange. And mold.

  As a result, as shown in FIG. 5, excess meat of the neck-in flange 12 forming the wave-shaped portion is pushed outward, and the gap between the lower half of the body curl 14 and the lower half of the neck-in flange is between A gap 16 is formed in the gap.

When the gap 16 is formed, the lower half of the barrel curl of the finished double drum can 17 is in a state where the diameter of the lower half is slightly increased. This portion is used when the lid 18 is attached to the double drum. Since this is a part that has no effect on the device, there will be no trouble during use.
If the wavy portion is extended inward, the inner edge of the neck-in flange may come into contact with the outer periphery of the outer can and be damaged.

The longitudinal cross-sectional view which shows schematic structure of the apparatus based on this invention. The principal part expansion longitudinal cross-sectional view which shows the state which set the interior can in the exterior can. The principal part expansion longitudinal cross-sectional view which shows the state currently pressed with the press die. The principal part expansion longitudinal cross-sectional view which shows the state currently pressed with the rotation piece. The principal part expansion longitudinal cross-sectional view which shows the state currently pressed with the press roller. The partially broken longitudinal cross-sectional view which shows an example of the double drum can of the completed state. The expanded longitudinal section of the trunk curl part in the conventional double drum can.

Explanation of symbols

1 Inner can 2 Outer can 3 Can (half-drum double drum can)
4 Turntable 5 Press die 6 Rotating piece 7 Arm 8 Actuator 9 Pressing roller 10 Arm 11 Actuator 12 Neck-in flange 13 Inner can body 14 Body curl 15 Wavy portion 16 Clearance 17 Double drum can (Completed)
18 lid

Claims (6)

  In the interior mounting method of a double drum can in which a bottomed cylindrical interior can that is also open at the top is installed in a bottomed tubular exterior can that is open at the top, in the interior top opening edge of the interior can in advance, The outer cross-section is curled into a reverse U-shape and the lower end edge is slightly wound inward, and the width of the outer can body curl is approximately the same or slightly wider between the lower end edge and the outer portion of the body. An outward neck-in flange having a gap was formed, an interior can was inserted into the exterior can, and the neck in flange was covered with the body curl of the exterior can, and the neck in flange was formed on the lower surface of the press die. Cover the upper half of the body curl of the outer can with the groove that has an inverted U-shaped cross section, and make the inner surface of the upper half of the neck-in flange adhere to the disk, making it approximately disk-shaped and rotating almost parallel to the axial direction of the outer can A rotating piece that rotates around its axis Is moved toward the center in the radial direction while rotating relative to the outer can on a circumferential track that is concentric with the outer can, and the end of the rotary piece is positioned at the end of the neck-in flange located below the body curl. Pressing the lower half of the neck-in flange against the lower surface of the body curl by bringing the edges into contact with each other, and then rotating the cylinder in the radial direction of the outer can around the axis substantially perpendicular to the axial direction of the outer can The roller is moved from the lower side to the upper side of the body curl on the circumferential track concentric with the outer can, and the corrugated part generated at the end edge is pressed in accordance with the diameter reduction of the neck-in flange so as to adhere to the lower surface of the body curl. A method for mounting an interior can of a double drum can configured to be made.   The surplus meat portion generated by pressing the corrugated portion is extended outward by pressing by the pressing roller, and a gap is formed between the trunk curl and the lower half of the neck-in flange. The internal drum mounting method of the double drum can described.   2. The method for mounting an inner can of a double drum can according to claim 1, wherein the rotating piece is configured to rotate around a rotation axis that forms 7 to 9 ° outwardly with respect to a central axis of the outer can. .   In an interior can mounting device for a double drum can in which a bottomed cylindrical interior can that is also open at the top is installed in a bottomed tubular exterior can that opens at the top, the opening edge of the interior can faces downward in the axial direction of the exterior can A pressing die that presses the upper half of the opening edge against the body curl, a fixing means for holding and fixing the outer can containing the inner can, and a substantially disc-like shape that rotates about a substantially vertical rotation axis. The end of the neck-in flange that is moved toward the center in the radial direction while rotating relative to the outer can on a circumferential track that is concentric with the outer can, and located below the body curl When the edge of the rotary piece is brought into contact with the rotary piece, the rotary piece that presses the lower half of the neck-in flange against the lower surface of the body curl, and a columnar shape, which is substantially orthogonal to the axial direction of the outer case in the radial direction of the outer case Around the axis It rotates and is moved from the lower side of the trunk curl to the upper side on the circular orbit that is concentric with the outer can. An internal can mounting apparatus for a double drum can, comprising: a pressing roller to be in close contact; and a rotation driving means for rotating the rotating piece and the pressing roller relative to the outer can.   The fixing means is configured by a support plate that rotatably supports the bottom of the outer can around an axis and the press mold, and the press mold is configured to be driven to rotate around the axis by the rotation driving means. The internal drum mounting device for a double drum can according to claim 4.   5. The double drum can interior can mounting device according to claim 4, wherein the rotary piece is configured to rotate around a rotation axis that forms 7 to 9 ° outwardly with respect to a central axis of the exterior can. .

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