JP4860532B2 - Can receiving pad - Google Patents

Description

  The present invention relates to a can receiving pad for holding the bottom of a can body.

  As cans that are filled and sealed with contents such as beverages, cans with flanges formed by tightening can lids at the open ends and bottle cans with caps screwed into the open ends are widely used. It is distributed in the market. As such a can body, the bottom portion has a dome portion that is recessed inward in the can axis direction of the trunk portion, and protrudes outward (downward) in the can axis direction of the trunk portion at the outer peripheral edge portion of the dome portion. DI (Drawing & Ironing) in which an annular convex portion is formed, and a connecting portion between the wall portion and the trunk portion that connects the annular convex portion and the trunk portion is a shoulder that protrudes outwardly from the can body Cans are generally known.

  In the process related to sealing after filling the contents such as beverages from the formation of such a can body, for example, a winding process of tightening a can lid around the opening end of the can body, or forming a DI can into a bottle can In the capping process in which the cap is attached to the bottle can and the screw is formed in the neck-in process for forming the screw, a pressing force in the can axis direction is applied to the can body during the molding because of the required high molding accuracy. It is necessary to securely fix the can body.

Therefore, when fixing the can body, for example, it is common to use a can receiving pad for holding the can body as shown in Patent Document 1 (FIG. 5), but producing a can body having a different bottom shape. In this case, it is necessary to change the can to the corresponding can receiving pad each time, and there is a problem that labor costs and cost increase due to the stop of the production line arise.
JP-A-2005-342752

However, in order to reduce production line downtime and costs, it is essential to suppress production line stoppage due to setup change even if the type of cans produced is changed. There is a strong demand for a technique for suppressing this.
The present invention has been made in view of such circumstances, and an object of the present invention is to provide a can receiving pad that can reduce the number of setup changes in production using cans of different types of can bottom shapes. And

In order to solve the above problems, the present invention proposes the following means.
The invention described in claim 1 has a first dome portion recessed at the bottom portion inward in the can axis direction of the trunk portion, and an outer peripheral edge portion of the first dome portion in the can axis direction of the trunk portion. A first annular convex portion protruding outward, and the first annular convex portion and the body portion are connected substantially linearly by an inclined wall portion in a cross section including the can shaft, The first can body in which the connecting portion between the inclined wall portion and the body portion is the first shoulder portion, and the outer diameter of the body portion at the bottom is the same as the outer diameter of the body portion of the first can body A second dome portion recessed toward the inner side in the can axis direction of the trunk portion, and an outer peripheral edge portion of the second dome portion protruding outward in the can axis direction of the trunk portion. And a portion between the second annular convex portion and the body portion is recessed more radially inward than the inclined wall portion of the first can body in the cross section including the can shaft. Curve contact The connecting portion between the curved connecting wall portion and the body portion is a second shoulder portion, and the distance in the can axis direction between the second shoulder portion and the second annular convex portion is connected by a wall portion. A can receiving pad that can hold both the first shoulder and the second can body formed larger than the distance in the can axial direction between the first annular projection and the first can. 1st can holding | maintenance shape part which hold | maintains the trunk | drum and 1st shoulder part connected to 1 shoulder part, and the inner periphery of the trunk | drum and 2nd annular convex part connected to a said 2nd shoulder part And a second can holding shape portion for holding the side.

  According to the can receiving pad according to the present invention, the first can body is held by the first shoulder portion and the inclined wall portion, and the second can body is formed in the second shoulder portion and the second annular convex portion. Since it is held by the peripheral side, both the first can body and the second can body are held at two or more locations in the can shaft direction, and the can shaft is securely fixed to the can receiving pad. As a result, since the pressing force is applied along the can axis direction, the can body can be prevented from buckling and falling.

  The can receiving pad according to claim 1, wherein the can receiving pad according to claim 1 includes an outer peripheral holding shape portion that holds an outer peripheral surface below the second shoulder portion. Features.

  According to the can receiving pad according to the present invention, since the outer periphery holding shape portion is formed, the second can body includes the second shoulder portion, the second annular convex portion, and the second can body. Since it is held on the outer peripheral surface below the second shoulder, the pressing force is stably applied in the can axis direction.

  According to the present invention, when producing cans of different types of can bottoms, the can bottom is held by a common can receiving pad, so that the number of setup changes is reduced, and the number of personnel required for the setup change is reduced. Expenses and costs associated with production line stoppage can be reduced.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows the bottom portions 11 and 12 of the first can body 10 and the second can body 20 according to an embodiment, and FIG. 2 shows a can receiving pad 40.

The first can body 10 is a can body having a bottomed cylindrical bottom portion 11, and as shown in FIG. 1 (A), the first can body 10 is recessed toward the inside of the trunk portion 12 in the direction of the can axis O <b> 1. 1 dome portion 13, and the outer peripheral edge portion of the first dome portion 13 is a first annular convex portion 16 projecting outward in the can axis O 1 direction of the body portion 12. The annular convex portion 16 and the trunk portion 12 are connected by an inclined wall portion 17.
The inclined wall portion 17 is formed in a substantially straight line in a cross section including the can axis O1, and is a first convex portion protruding outward of the first can body 10 at a connecting portion between the inclined wall portion 17 and the body portion 12. A shoulder 18 is formed.

 The second can body 20 is a can body having a bottomed cylindrical bottom portion 11. As shown in FIG. 1B, the outer diameter of the body portion 22 in the vicinity of the bottom portion 21 is equal to that of the first can body 10. The body portion 12 has the same outer diameter in the vicinity of the bottom portion 11, and the bottom portion 21 has a second dome portion 23 that is recessed inward in the can axis O 2 direction of the body portion 22, and the second dome portion 23. The outer peripheral edge portion of the body portion 22 is a second annular convex portion 26 projecting outward in the can axis O2 direction of the body portion 22, and the curve connecting wall portion is between the second annular convex portion 26 and the body portion 22. 27.

The curved connection wall portion 27 has a cross section including the can axis O2 that is concave inward in the radial direction from the inclined wall portion 17 of the first can body 10, and the curved connection wall portion 27 and the body portion 22 A second shoulder portion 28 that is convex outward from the second can body 20 is formed at the connecting portion.
The distance L2 between the second shoulder 28 of the second can body 20 and the bottom surface of the second annular protrusion 26 in the can axis O2 direction is the same as the distance between the first shoulder 18 of the first can body 10 and the distance L2. It is formed larger than the distance L1 in the can axis direction O1 direction from the bottom surface of the first annular convex portion 16.
Here, the starting points of the shoulder portions 18 and 28 at the can axial distances L1 and L2 are the trunk portions 12 and 22, the inclined wall portion 17 and the curved connection when the shoulder portions 18 and 28 do not have the corner R. This is the height direction position of each intersection of the wall portion 27.

  Further, the bottom portions 11 and 21 of the first and second can bodies are formed outwardly in the can axis direction of the annular convex portions 16 and 26 when the first and second can bodies 10 and 20 are in an upright posture. The side surface is a grounding portion in contact with the grounding surface.

 As shown in FIG. 2, the can receiving pad 40 has a pocket concave portion 41 formed in the central portion of the cylindrical body, and can store and hold both the first can body 10 and the second can body 20. Yes.

 A first can body holding shape portion 42 and a second can body holding shape portion 43 are formed in the pocket concave portion 41, and the first can body holding shape portion 42 is formed by the first shoulder portion 18. The body portion 12 </ b> A of the portion to be connected to and the at least the vicinity of the first shoulder portion 18 of the inclined wall portion 17 can be held, and the second can holding shape portion 43 is connected to the second shoulder portion 28. The body portion 22 </ b> A and the inner circumferential side surface 26 </ b> A of the second annular convex portion 26 are formed so as to be able to be held.

 In this embodiment, the first can holding shape portion 42 has an R-shaped outer peripheral side portion 12 A constituting the first shoulder portion 18, and an R-shape constituting the second shoulder portion 28. It is formed in an annular shape around the can axis O1 for holding the cylindrical portion 41A capable of holding the body portion 22A of the outer peripheral side portion and the inclined wall portion 17 connected to each of the first shoulder portions 18 from the lower side. And an inclined holding portion 41B whose inner peripheral side is inclined downward.

 In this embodiment, the cylindrical portion 44 is configured in common to the first can body holding shape portion 42 that holds the body portion 12A and the second can body holding shape portion 43 that holds the body portion 22A. The inner diameter is slightly larger than the body portions 12A and 22A.

 In addition, an annular groove 45 is formed on the bottom surface of the can receiving pad 40 so as to be complementary to the second annular convex portion 26. The annular groove 45 is located on the inner circumferential side of the annular groove 45 and faces the outer circumferential side. A second can body holding shape portion 43 is formed by the peripheral wall portion 45A, and an outer peripheral holding shape portion 47 is formed by the outer peripheral wall portion 45B positioned on the outer peripheral side of the annular groove 45 and facing the inner peripheral side, and the shoulder portion 28. The outer peripheral side surface 26B of the second annular convex portion 26 located further downward is held.

Next, the operation of the can receiving pad 40 according to this embodiment will be described.
When the first can body 10 is accommodated in the can receiving pad 40, the first can body 10 has an inclined wall portion because the barrel portion 12 </ b> A connected to the first shoulder portion 18 is formed by the cylindrical shape portion 44. 17 is held by the inclined surface 42 </ b> A of the first can holding shape portion 42.
When the second can body 20 is housed in the can receiving pad 40, the second can body 20 has the barrel portion 22A connected to the second shoulder portion 28 by the cylindrical shape portion 44, so that the second can body 20 The inner peripheral side surface 26A of the annular convex portion 26 is held by the inner peripheral wall portion 45A of the annular concave groove 45, and the outer peripheral side surface 26B of the second annular convex portion 26 is held by the outer peripheral wall portion 45B of the annular concave groove 45.
In this way, the first can body 10 and the second can body 20 held by the can receiving pad 40 can be pressed in the direction of the can shafts O1 and O2 in, for example, a tightening device, a neck-in processing device, and a screw forming device. Pressure is applied to process these processes.

  According to the can receiving pad 40 according to the above-described embodiment, since both the first can body 10 and the second can body 20 can be held, production relating to different types of can bodies having different can bottom shapes can be achieved. In this case, the number of setup changes can be reduced. As a result, the labor cost required for the setup change and the cost associated with the stop of the production line can be suppressed.

  The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, in the above embodiment, Although the case where the lower surface of the annular convex portion 16 of the first can body 10 is not held has been described, the lower surface, the inner peripheral surface, and the outer peripheral surface of the annular convex portion 16 of the first can body 10 are supported by the can receiving pad 40. It is also possible to form an annular groove that can hold

Next, the result of having verified the effect of the can receiving pad 40 concerning this invention is shown.
3 and 4 are views showing the effects of the can receiving pad 40 according to this embodiment. In each of FIGS. 3 and 4, (A) is an example, and (B) is a can body. (C) has shown the comparative example 2 in the state in which the can body was hold | maintained by the exclusive can receiving pad.
The cans used in this verification test are the first can body 10 and the second can body 20 each having a diameter of 66 mm and a height of 133 mm. The first can body 10 and the second can body in the above embodiment. For three pieces having bottom shapes corresponding to each of the bodies 20, the load in the can axis direction (pressing force, vertical axis) (N) is changed, and the change in the can axial displacement (horizontal axis) at the pressing force is changed. Was measured.

  According to this verification test, as shown in FIG. 3, for the first can 10, the displacement at the pressing force 1600 (N) is about 0.35 mm in the example and about 0.55 mm in the comparative example 1 and is compared. In Example 2, it is about 0.35 mm, and the displacement in the axial direction of the can in the example is equivalent to a can receiving pad dedicated to each conventional can body, and is about 63% of the state where the can body is not held. It was confirmed that it was suppressed.

  For the second can 20, as shown in FIG. 4, the displacement at the pressing force 1600 (N) is about 0.32 mm in the example, about 0.65 mm in the comparative example 1, and about 0.65 mm in the comparative example 2. It is 0.58 mm, and the axial displacement in the can is suppressed to 55% of the can receiving pad dedicated to each conventional can body and about 49% of the state in which the can body is not held. confirmed.

It is a longitudinal cross-sectional view which shows the bottom part of the can which concerns on one Embodiment of this invention, (A) is a 1st can and (B) is a figure which shows a 2nd can. It is a longitudinal cross-sectional view which shows the can receiving pad which concerns on one Embodiment of this invention. It is a figure which shows the effect in the 1st can of the can receiving pad which concerns on one Embodiment of this invention, (A) is an Example, (B), (C) is a figure which shows a comparative example. It is a figure which shows the effect in the 2nd can body of the can receiving pad which concerns on one Embodiment of this invention, (A) is an Example, (B), (C) is a figure which shows a comparative example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 1st can body 11,21 bottom part 12,22 trunk | drum 13 1st dome part 16 1st cyclic | annular convex part 17 inclined wall part 18 1st shoulder part 20 2nd can body 23 2nd dome part 26 second annular convex portion 28 second shoulder portion 27 curved connection wall portion 40 can receiving pad 42 first can body holding shape portion 43 second can body holding shape portion 47 outer periphery holding shape portion

Claims (2)

A first dome part that is recessed toward the inner side in the can axis direction of the trunk part, and an outer peripheral edge part of the first dome part projects outward in the can axis direction of the trunk part; An annular convex portion is formed, and the first annular convex portion and the body portion are connected substantially linearly by an inclined wall portion in a cross section including the can shaft, and the inclined wall portion and the body portion are connected. A first can body whose part is a first shoulder;
The outer diameter of the body portion at the bottom portion is the same as the outer diameter of the body portion of the first can body, and has a second dome portion that is recessed toward the inside in the can axis direction of the body portion, The outer peripheral edge portion of the dome portion 2 is a second annular convex portion projecting outward in the can axis direction of the trunk portion, and the can shaft is located between the second annular convex portion and the trunk portion. A connecting portion between the curved connecting wall portion and the trunk portion is connected to a second shoulder by a curved connecting wall portion that is recessed radially inward from the inclined wall portion of the first can body The can axial direction distance between the second shoulder and the second annular convex is greater than the can axial distance between the first shoulder and the first annular convex. A can receiving pad that can hold both the formed second can body and
A first can body holding shape portion for holding the body portion connected to the first shoulder portion and the inclined wall portion;
A can receiving pad comprising: a body portion connected to the second shoulder portion; and a second can body holding shape portion for holding an inner peripheral side of the second annular convex portion. The can receiving pad according to claim 1,
A can receiving pad comprising an outer peripheral holding shape portion for holding an outer peripheral surface below the second shoulder portion.

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