JPH012745A - Can lid seaming device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a device for tightening the lid of a liquid can.

(Prior Art) - The so-called D1 can body formed by drawing aluminum is often used for the can bodies of cans for IIC beverage liquids, such as carbonated drinks. For this type of can, material costs have been reduced by thinning the aluminum that forms the can body.However, if the thickness of the can body is reduced below a certain level, When tightening the can lid onto the can body, the can body is buckled and deformed before the can lid is completely tightened due to the pressing force applied in the axial direction of the can body by a lifter and a seaming chuck in the seaming machine.

(Problems to be Solved) The present invention provides a can lid that can be wrapped and tightened without causing buckling deformation of the can body when the can lid is wrapped around the can body even if the plate thickness of the can body is made thinner than before. The purpose of this invention is to provide a seaming device.

(Means for solving the problem) In order to achieve the above object, the present invention provides a can lid seaming device which presses the can lid in the axial direction of the can body when the can lid is seamed onto the can body. A preferred embodiment of the seaming device of the present invention is characterized in that the seaming device is characterized in that restraining steps for restraining deformation of the can body in the radial direction are provided on all sides of the can body. According to the invention, the can body is equipped with a lifter that lifts and lowers the can body, a seaming chuck that presses the can lid together with the lifter in the axial direction of the can body, and a seaming means that wraps the can lid around the can body. , characterized in that the restraining means is provided between the lifter and the seaming chuck.

(Function) In the present invention, by employing the above-mentioned means, the restraining means is located on all sides of the can body on the outside of the can body, and presses the can lid and the can body in the axial direction when the can lid is tightened. radial deformation of the can body due to

Further, according to the above-mentioned preferred configuration, the restraining means is positioned between the lid and the seaming chunk when the can body is lifted and lowered, and the can body is inserted into the restraining means by the lifting of the lifter, and the can body is raised and lowered together with the can lid. When pressed in the axial direction by the lifter and seaming chuck, deformation of the can body in the radial direction is restrained.

(Example) An example of implementation of the present invention will be described in detail below with reference to the drawings.

In Figure 1, 1 beam lid, 2 is seaming chuck, and 3
indicates seaming roll.

The lifter 1 consists of a cam 4 and a cam follower 5, and the cam follower 5 is guided by the cam 4 and moves up and down. A support 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 7. A casing 9 is provided on the upper outer periphery of the support body 7 via a second bearing 8, and the casing 9 is attached to be slidable above and below a first revolving arm 11 connected to a main shaft 10. Further, a spline gear 12 is provided on the lower outer periphery of the support body 7 along the central axis of the support body 7, and a fixed gear 13 is meshed with the spline gear 12. Therefore, when the arm 11 rotates, the support body 7 inside the casing revolves, and the lower spline gear 12 of the support body 7 meshes with the fixed gear 13, causing the support body 7 to rotate around the central axis. It is configured to rotate using upper and lower bearings 6.8.

Further, a spring 14 is arranged in a cylindrical hollow part provided inside the support body 7, and the can body A is placed above the spring 14 and is urged upward by the spring 14. A support Fi, 15 is provided which is locked at and rotates together with the support 7. On the other hand, the seaming channel 2 has a second revolving arm connected to the main shaft 10, which rotates in synchronization with the rotating can body A via the rotating support 7 and support plate 15 above the can body A. 16, it is installed so as to revolve coaxially with the can body A.

Furthermore, as shown in FIGS. 2 and 3, the seaming roll 3
has a groove 17 for wrapping the end hook part of the can 1tI B around the flange part a of the can body A, and the support shaft 18 of the seaming roll 3 is parallel to the support shaft 19 of the seaming chuck 2. It is arranged so that

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

Reference numeral 20 in FIG. 1 shows the structure of a reinforcing ring which is an example of the restraint means of the present invention, and the reinforcing ring 2o is placed between the can body A@the supporting plate 15 on which it is mounted and the seaming chuck 2.
is inserted into the reinforcing ring 2o, the can MB is inserted into the can body A.
It is located in a position where it can be placed in the upper opening of the The reinforcing ring 20 consists of inner and outer coaxial cylindrical members 21,22 of sufficient length to surround all sides of the can body.

The inner cylindrical member 21 is rotatable via a needle bearing 23 provided between it and the outer cylindrical member 22, and the outer cylindrical member 22 is integrally formed with an arm 24 connected to the main ah 10 to support the support 7. and seaming chuck 2
It revolves coaxially with.

Next, the operation of the 20 seaming device will be explained. As shown in FIG. 1, the inside of the can body A is filled with a liquid (not shown) and the support plate 15 is
niS! place Next, the can body A is connected to the arm 1 by the main shaft 10.
It revolves in the radial direction of the can body Δ via the casing 9 and the support body 7 fixed to the can body 1. According to this revolution movement, the can body A is moved upward via the support body 7 by a lifter l consisting of a cam 48 and a cam follower 5, and at the same time, the support body 7 is rotated by the spline gear 12 and fixed gear 13 at the lower part of the support body 7, and the can body A is rotated at the same time. Torso A rotates. Also, after the can body A is inserted into the reinforcing ring 20 during upward movement by the lifter 1, the can MB is supplied to the upper opening of the can body A, and then the can MB is supplied to the lower opening of the seaming chuck 2. It rises until the top surface of the lid B is joined.

Next, as shown in FIG. 3, the lifter 5 further rises and the flange part a of the can body A and the end hook part of the can MB are moved to a predetermined position using the lifter l and the seaming chuck 2 by the urging force of the spring 14. Press with pressure.

Next, the end hook portions of the flanges a and m A B of the can body A are pressed against the end hook portions of the can MB from the radial direction of the can body A using the groove portion 17 provided in the seaming roll 3. Wrap it around flange part a of body A.

Next, the operation of the reinforcing ring 20 will be explained in detail using FIG. 2.

When the can body A is inserted into the reinforcing ring 20 by lifting the lifter 1 and pressed together with the can 11WL B in the axial direction by the biasing force of the springs 14, the can body A is slightly deformed in the radial direction and the reinforcing ring 20 is connected. It is pressed against the inner cylindrical member 21 and rotates together with the inner cylindrical member 21 by a needle bearing 23 provided between the inner and outer cylindrical members 21 and 22. Therefore, flange part a of can FA and can MB
The rotation of the end hook part is not affected by the reinforcing ring 20, and the seaming roll 3 is tightened by the groove part 17.

According to the seaming device in which a reinforcing ring is provided between the lid and the seaming chuck of the above-described embodiment, by inserting the can body into the reinforcing ring as the lifter rises, the can body is pressed in the axial direction. As shown in Figure 4, the elastic limit point is clearly higher than that without the reinforcing ring, and the seaming device of this embodiment is extremely effective as a countermeasure against deformation and buckling of the can body due to pressure during seaming. It was found that the structure of this example was effective and that it was possible to reduce the thickness of the can body. However, in Figure 4, "with" means using the above-mentioned reinforcing ring,
In addition, "None" indicates the elastic limit point when the can body was pressed in the axial direction without using a reinforcing ring.

In the above-described embodiment, the liquid to be filled into the can body is preferably a foaming liquid, which is more suitable for maintaining the shape of the can due to the internal pressure of the liquid after filling. Further, although the above-mentioned embodiment was performed for tightening the can lid of a two-piece can, similar results can be obtained for a three-piece can. In addition, the reinforcing ring of the present invention is divided into two parts in the axial direction and holds the can body from the left and right sides of the can body. The can body may be configured to restrain deformation, or the can body may be installed in the reinforcing ring in advance without being integrally formed or fixed to the arm member and placed on the support plate. It goes without saying that the configuration can be changed without departing from the gist of the present invention if the intention of the present invention in the examples is understood.

(Effect) Therefore, according to the present invention, when the can lid is tightened, the restraining means is located on all sides of the can body on the outside of the can body, and the radius of the can body is reduced by pressing the can lid and the can body in the axial direction. Since directional deformation is restrained, buckling deformation of the can body can be prevented even when the can lid is wrapped around a can body that is thinner than before. Therefore, the material cost of the can can be reduced, and at the same time, by making the can thinner, the can can be easily crushed after use, making it easier to dispose of it.

Furthermore, according to a preferred configuration of the seaming device of the present invention, the restraining means is a reinforcing ring, and if the reinforcing ring is placed between the lid and the sealing chuck when the can body is raised and lowered, the can When the can body is automatically inserted into the reinforcing ring by the lifting of the lifter and is pressed in the axial direction with the can lid by the lifter and seaming chuck, the radial deformation of the can body is restrained. As described above, the lid can be easily tightened without deforming the can body.

[Brief explanation of drawings]

The drawings show an example of an embodiment of the present invention, and FIG. FIG. 2 is an explanatory sectional view similar to FIG. 1 in a tightened state. FIG. 3 is a partially enlarged view of FIG. 2. Further, FIG. 4 is a diagram showing the elastic limit point of the can body depending on whether or not a restraining means is provided. ■...Lifter 2...Seaming chuck 3...Seaming roll 20...Restraint means \...Case 1 B...Can lid patent applicant Hokkai Seikan Co., Ltd., 2 18 ．． ..., 1 agent (left Tatsu Kiyoshi: 'nee'... hole: il;
,,'+ -to 1 \ None 11

Claims (1)

[Claims] 1. In a device that presses the can lid in the axial direction of the can body to tighten the can lid when tightening the can lid to the can body, a restraining means for restraining deformation of the can body in the radial direction is provided. A can lid seaming device characterized by being provided on all sides of the can body. 2. The seaming device includes a lifter that lifts and lowers the can body by placing it thereon;
A seaming chuck for pressing the can lid together with the lifter in the axial direction of the can body, and a seaming means for wrapping the can lid around the can body, and the restraining means is provided between the lifter and the seaming chuck. A can lid seaming device according to claim 1, characterized in that: