JP2568203B2 - Can lid winding device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a device for winding a can lid of a liquid can.

(Prior Art) A so-called DI can body formed by drawing aluminum is often used as a can body of a can for general beverage liquid, for example, carbonated drinking water. In this type of can, the material cost is reduced by reducing the thickness of aluminum that is the material of the can body. However, if the plate thickness of the can body is set below a certain thickness,
When the can lid is wound around the can body, the can body is buckled and deformed before the completion of the can lid winding due to the pressing force applied in the axial direction of the can body by the lifter and the seaming chuck in the winding machine.

(Problems to be Solved) The present invention is a can lid that can be tightened without buckling deformation of the can body when the can body is wound around the can body even when the can body is made thinner than before. It is an object of the present invention to provide a tightening device for.

(Means for Solving the Problem) In order to achieve the above object, the present invention presses a rotatable lifter that mounts and lowers a can barrel and a can lid together with the lifter in the axial direction of the can barrel. A rotatable seaming chuck and a winding means for winding the can lid around the can body are provided, and the can lid and the can body are integrally rotated through the lifter and the seaming chuck to attach the can lid to the can body. In the winding device, between the lifter and the seaming chuck, there is provided restraining means for inserting the can body during the winding of the can lid and restraining the radial deformation of the can body. When the barrel is pressed by the lifter and the seaming chuck, the tubular member that comes into contact with the side surface of the can barrel and restrains the can barrel from the outside while being rotatable integrally with the can barrel; It is characterized by comprising a supporting member that rotatably supports.

(Operation) By adopting the above-mentioned means, the restraining means restrains the can body pressed by the lifter and the seaming chuck from the outside to prevent the can body from being deformed in the radial direction. The can body is housed in the tubular member of the restraining means, and is pressed by the lifter and the seaming chuck to come into contact with the tubular member. As a result, the tubular member of the restraining means restrains the can body from the outside. Then, the tubular member rotates following the rotation of the can body during tightening, and the can body is restrained by restraining the can body while preventing the occurrence of scratches on the side surface of the can body due to contact between the can body and the tubular member. Prevent deformation.

Further, according to the above-described preferable structure, the restraint means is located between the lifter and the sea mink chuck that move up and down with the can body placed thereon, and the can body is inserted into the restraint means by the lift of the lifter so that the can lid and It constrains the radial deformation of the can body when pressed axially by the lifter and seaming chuck.

(Embodiment) An embodiment of the present invention will be described in detail below with reference to the drawings.

In FIG. 1, 1 is a lifter, 2 is a seaming chuck, and 3 is a seaming roll.

The lifter 1 includes a cam 4 and a cam follower 5, and the cam follower 5 is guided by the cam 4 and moves so as to be able to move up and down. A support body 7 is provided outside the upper cylindrical portion of the cam follower 5 via a first bearing 6 so as to be rotatable around the central axis of the support body 7. A casing 9 is provided on the outer periphery of the upper portion of the support body 7 via a second bearing 8, and the casing 9 is slidably mounted above and below a first revolution arm 11 connected to a main shaft 10. A spline gear 12 is provided on the outer periphery of the lower portion of the support 7 along the central axis of the support 7 of the support 7.
The fixed gear 13 is meshed with. Therefore, when the arm 11 rotates, the supporting body 7 inside the casing revolves around and the lower spline gear 12 of the supporting body 7 moves to the fixed gear.
The support 7 is meshed along 13 and is rotated around the central axis by the upper and lower bearings 6 and 8.

Further, a spring 14 is arranged in a cylindrical hollow portion provided inside the support body 7, and a can body A is placed on the spring 14 and the can body A is mounted thereon.
A support plate 15 is provided which is biased upward at 14 and is locked on the upper portion of the support body 7 to rotate together with the support body 7. On the other hand, the seaming chuck 2 rotates in synchronization with the can body A which rotates above the can body A through the support 7 and the support plate 15 which rotate by the above-mentioned structure, and the second revolution arm which is connected to the main shaft 10.
It is provided by 16 so that it can revolve around the can body A coaxially.

Further, as shown in FIGS. 2 and 3, in the seaming roll 3, the end hook portion b of the can lid B is connected to the flange portion a of the can body A.
It has a groove portion 17 for tightly winding it and is arranged so that the support shaft 18 of the seaming roll 3 is parallel to the support shaft 19 of the seaming chuck 2.

The configuration described above is found in prior art can lid wrapping devices. Next, an example of the main part of the present invention will be described in detail below.

20 shows the structure of a reinforcing ring which is an example of the restraint means of the present invention. The reinforcing ring 20 is provided between the supporting plate 15 on which the can body A is placed and the seaming chuck 2. Is provided at a position where the can lid B can be placed in the upper opening of the can body A when it is inserted into the reinforcing ring 20. The reinforcing ring 20 is an inner cylindrical member 21 which is a cylindrical member having a length sufficient to surround all side surfaces of the can body excluding the neck-in portion, and an outer cylindrical member which is a support member externally inserted into the inner cylindrical member 21. And a member 22. The inner cylindrical member 21 is rotatable via a needle bearing 23 provided between the inner cylindrical member 21 and the outer cylindrical member 22, and the outer cylindrical member 22 is integrally formed with an arm 24 connected to the main shaft 10 to support the support member 7 and Revolves coaxially with the seaming chuck 2.

Next, the operation of this winding device will be described. As shown in FIG. 1, the inside of the can body A is filled with a liquid (not shown) to support the support plate 15
Place on. Next, the can body A revolves in the radial direction of the can body A via the casing 9 and the support 7 fixed to the arm 11 by the main shaft 10. In accordance with this revolving movement, the can body A moves upward through the support body 7 by the lifter 1 composed of the cam 4 and the cam follower 5, and the support body 7 rotates by the spline gear 12 and the fixed gear 13 below the support body 7, and at the same time the can body is rotated. Body A rotates. Further, the can body A is inserted into the reinforcing ring 20 during the upward movement by the lifter 1 and then the can lid B is formed.
Is supplied to the upper opening of the can body A and is further raised until the upper surface of the can lid B is joined to the lower opening of the seaming chuck 2.

Next, as shown in FIG. 3, the lifter 5 is further raised to set the can body A, the flange portion a, and the end hook portion b of the can lid B by the urging force of the spring 14 by the lifter 1 and the seaming chuck 2. Press with the pressure of.

Next, the flanges a of the can body A and the end hook portions b of the can lid B are pressed by the groove portions 17 provided in the seaming roll 3 in the radial direction of the can body A so as to press the end hook portions b of the can lid B. Tighten it around the flange a of the can body A.

Next, the operation of the reinforcing ring 20 will be described in detail with reference to FIG.

When the can body A is inserted into the reinforcing ring 20 by raising the lifter 1 and is axially pressed by the biasing force of the spring 14 together with the can lid B, the can body A is slightly deformed in the radial direction and comes close to it. It is pressed against the inner cylindrical member 21 and is rotated integrally with the inner cylindrical member 21 by a needle bearing 23 provided between the inner and outer cylindrical members 21 and 22. Therefore, the rotation of the flange portion a of the can body A and the end hook portion b of the can lid B is wound by the groove portion 17 of the seaming roll 3 without being impaired by the reinforcing ring 20.

According to the winding device in which the reinforcing ring is provided between the lifter and the seaming chuck of the above-described embodiment, the can body is inserted into the reinforcing ring by the lifter rising, so that the can body is pressed in the axial direction. As shown in FIG. 4, the elastic limit point is clearly higher than that without the reinforcing ring, and the winding device of this embodiment is very useful as a countermeasure against deformation and buckling of the can body due to pressing during winding. It has been found that the structure of this embodiment is effective and the can body can be made thinner. However, in FIG. 4, "existence" indicates the elastic limit point in the case where an axial pressing test of the can body is performed without using the reinforcement ring and "absence".

The liquid to be filled in the can body in the above-described embodiment is preferably a foamable liquid that is more suitable for maintaining the shape of the can by the internal pressure of the liquid after filling. Further, in the above-described embodiment, the tightening of the can lid of the two-piece can is performed, but the same result can be obtained for the three-piece can. Needless to say, the configuration can be changed without departing from the gist of the present invention by understanding the intention of the present invention in the above-described embodiments.

(Effect) Therefore, according to the present invention, when the can lid is wound, the restraint means is on the side surface of the can barrel outside the can barrel so that the can lid and the can barrel are pressed in the radial direction. Since the deformation of the can barrel is restrained, the buckling deformation of the can barrel can be prevented even when the can lid is wound around the can barrel which is thinner than before. Therefore, the material cost of the can can be reduced, and at the same time, the can body can be thinned to facilitate crushing of the can after use, and the disposal can be facilitated. Further, by rotatably supporting the tubular member by the supporting member of the restraint means, the tubular member is rotated integrally with the rotating can body by being pressed by the lifter and the seaming chuck, so that the outer periphery of the can body is secured during winding. It is possible to prevent scratches and the like from occurring and improve the appearance quality of the can body.

Further, according to the configuration of a preferred example of the winding device in the present invention, the restraining means is a reinforcing ring, and the reinforcing ring is arranged between a lifter for raising and lowering a can body and a sealing chuck. As the cylinder is automatically inserted into the reinforcing ring by the lifting of the lifter and is axially pressed by the lifter and the seaming chuck together with the can lid, the radial deformation of the can cylinder is restrained. The winding of the lid can be easily performed without deforming the can body as described above.

[Brief description of drawings]

The drawing shows an example of an embodiment of the present invention, and FIG. 1 is an explanatory sectional view of an embodying apparatus. FIG. 2 is an explanatory sectional view similar to FIG. 1 in a wound state. FIG. 3 is a partially enlarged view of FIG. FIG. 4 is a diagram showing the elastic limit points of the can body depending on the presence or absence of restraint means. 1 ... Lifter, 2 ... Seaming chuck 3 ... Seaming roll, 20 ... Restraint means A ... Can barrel, B ... Can lid

Claims (1)

(57) [Claims] 1. A rotatable lifter that mounts and lowers a can barrel, and a rotatable seaming chuck that presses the can lid together with the lifter in the axial direction of the can barrel; and the can lid is wound around the can barrel. An apparatus for winding and tightening a can lid and a can body by integrally rotating the can lid and the can body through a lifter and a seaming chuck, and between the lifter and the seaming chuck, When the can lid is tightened, the can body is inserted to restrain the deformation of the can body in the radial direction. The restraining means is provided when the can body is pressed by the lifter and the seaming chuck. A cylindrical member that is rotatable integrally with the can body while abutting on the side surface of the can body and restraining the can body from the outside; and a support member that rotatably supports the cylindrical member. Can lid winding device.