JP2005342752A - Apparatus for manufacturing can - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the deterioration of the quality of a can and the drop of the working rate of an apparatus by easily specifying the breakage of an expansion ring. <P>SOLUTION: This apparatus is provided with a detecting means 40 for detecting the breakage of the expansion ring 30. The detecting means 40 is provided with a passage 41 for checking which communicates with the flow passage 31 of the expansion ring 30 on the apparatus main body 11 and air is supplied from a supply source to the passage 41 for checking at lower pressure ( 0.1 MPa, for example ) than the prescribed pressure. The breakage of the expansion ring 30 is detected by judging whether the ring is expanded or not when the lower pressure air is supplied to the expansion ring 30 through the passage 41 for checking and the flow passage 31 in the state where a worked can is taken out by a taking-out mechanism. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a can manufacturing apparatus, and more particularly to a technique suitable for forming a bottomed cylindrical can into a desired shape.

As is well known, a beverage bottle can is generally formed as a DI can because it is formed by drawing a metal plate made of aluminum or an alloy thereof, and then performing an ironing process (Ironing). It is.
Such a DI can is formed into a large-sized bottle can by drawing and ironing a metal plate with a can manufacturing device and then forming a cup shape by repeating the drawing and ironing process again. Is done.

In the conventional can manufacturing apparatus, at the time of drawing and ironing, as shown in FIG. 5, the can bottom 2 of the bottle can 1 is fitted and held in a base pad 4 as a can bottom holding portion. The can body 3 of the bottle can 1 is held by a holding body 5 as an expandable ring, and the bottle can 1 is subjected to predetermined processing in that state (see, for example, Patent Document 1).
The base pad 4 is formed in a concave shape so that the bottom of the bottle can 1 can be fitted. The holding body 5 is formed in an annular shape by an elastic material. When the can bottom 2 of the bottle can 1 is held by the base pad 4, air is supplied to a flow path (not shown) provided inside. And bulge inward as a whole. The holding body 5 bulges inward as a whole to reduce the diameter and surround the periphery of the can body 3 of the bottle can 1 so that the can body 3 rotates around the axis in the base pad 4. It is held so that it can be prevented.
In FIG. 5, reference numeral 6 denotes a can bottom restraint type that is airtightly inserted into the bottle can 1, and air is sent into the bottle can 1 as indicated by an arrow, so that the can bottom 2 of the bottle can is the base. It is adapted to be pressed so as to correspond to the shape of the pad 4.
JP 2003-245733 A (page 2-5, FIGS. 1 to 4)

In the conventional can manufacturing apparatus, when the bottle can 1 is processed, when the base pad 4 as the can bottom holding portion holds the can bottom 3, the expansion ring 5 as the expansion ring holds the can body from the outer periphery. Thus, the bottle can 1 can be satisfactorily processed without co-rotation.
However, for example, when air is supplied to the expansion / contraction ring 5 to process the bottle can 1 at the beginning of operation of the apparatus, there is no problem when the bottle can 1 is held in the can bottom holding portion 4 in advance. When the bottle can 1 is not yet supplied to the bottom holding part 4 and air is supplied to the expansion / contraction ring 5, the expansion / contraction ring 5 swells significantly inward to the extent that it cannot be elastically restored to its original state, There was a problem of being torn. This problem may occur not only at the beginning of the operation of the apparatus but also at the end of the operation.
In such a case, it is necessary to find the tear of the expansion ring 4 and replace it with a new one. However, since a large number of expansion rings are actually provided, the torn expansion ring 4 cannot be easily found. There was also a problem that it took a considerable time to identify.
Also, if you continue to operate the device without noticing that the expansion ring has been broken, the broken expansion ring will not only cause scratches and dents on the bottle can, but also reduce the quality, and replace the expansion ring. In order to do this, the apparatus must be stopped, and the operating rate of the apparatus is reduced.

  The present invention has been made in consideration of such circumstances, and its purpose is to easily identify the breakage of the expansion and contraction ring and to prevent the can quality and the apparatus operating rate from being lowered. An object of the present invention is to provide a can manufacturing apparatus.

In order to achieve the above object, the present invention proposes the following means.
The invention according to claim 1 is formed in an annular shape so as to surround the rotating disc intermittently around the central axis and the can body, and a plurality of them are arranged at the same radial position on the rotating disc, An expansion ring that swells inward by a fluid of a predetermined pressure supplied inside and holds the can body of the can, and when the expansion ring is positioned at the can supply position by the rotation of the rotating disk The expansion ring holds the can and performs predetermined processing in the holding state. When the expansion ring that has finished processing the can is positioned at the can discharge position by rotation of the rotating disk, the processing is finished. In the can manufacturing apparatus in which the can is discharged from the expansion / contraction ring, the can includes a detection means for supplying a fluid to the expansion / contraction ring and detecting breakage of the expansion / contraction ring.
According to a second aspect of the present invention, in the can manufacturing apparatus according to the first aspect, in the main body of the apparatus, the detecting means reaches between the can discharge position and the can supply position at which the rotating disk has finished processing. It is provided in the position.
According to a third aspect of the present invention, in the can manufacturing apparatus according to the first or second aspect, the detection means is configured such that the fluid supplied to the telescopic ring is a pressure lower than the predetermined pressure.
According to a fourth aspect of the present invention, in the can manufacturing apparatus according to any one of the first to third aspects, the detection means includes a pressure gauge for detecting fluid pressure.
According to a fifth aspect of the present invention, in the can manufacturing apparatus according to any one of the first to third aspects, the detection means includes a flow meter for detecting a flow rate of the fluid.
The invention according to claim 6 is the can manufacturing apparatus according to any one of claims 1 to 3, wherein the detection means includes a pressure gauge for detecting a fluid and a flow meter for detecting a flow rate of the fluid. Features.

  According to the first aspect of the present invention, the detection means is configured to detect the breakage of the expansion and contraction ring by supplying air to the expansion and contraction ring. As a result of being able to easily identify the expansion / contraction ring that has been damaged, it is possible to prevent the quality of the can from being deteriorated by quickly replacing the expansion / contraction ring in which damage has occurred, and the operating rate of the device It is possible to prevent the decrease, and the effect that the reliability of the apparatus can be increased accordingly.

  According to the invention of claim 2, the detection means inspects the expansion / contraction ring passing between the can supply device and the can discharge device, while the expansion / contraction ring is between the can supply device and the can discharge device. Since the can is not held, the detection means can reliably check whether the expansion ring is broken without being obstructed by the can, and the expansion ring does not hold the can. Therefore, there is no risk of damaging the can during inspection.

  According to the invention of claim 3, since a fluid having a pressure lower than a predetermined pressure is supplied to the expansion / contraction ring, when the expansion / contraction ring is not damaged, there is no possibility that the expansion / contraction ring bulges inwardly, The effect that there is no fear of breakage is acquired.

  According to the invention of claim 4, since the detecting means includes the pressure gauge, when the fluid is supplied to detect the breakage, the fluid pressure is reduced if the expansion / contraction ring is broken. Thus, the effect of reliably detecting the breakage of the expansion / contraction ring can be obtained.

  According to the invention of claim 5, since the detecting means includes a flow meter, when the fluid is supplied to detect the breakage, the fluid will flow out if the expansion / contraction ring is broken. The effect that the breakage of the expansion / contraction ring can be reliably detected by the flow rate is obtained.

  According to the invention according to claim 6, in the can manufacturing apparatus according to any one of claims 1 to 5, when the fluid is supplied to detect the breakage, if the expansion / contraction ring is broken, Since the fluid pressure of the pressure gauge decreases, it is possible to reliably detect the breakage of the expansion ring. On the other hand, since the detection means includes a flow meter, when the fluid is supplied to detect the breakage, the expansion ring is If it is broken, the fluid can flow out and be detected by the flow meter, so that the breakage of the expansion / contraction ring can be reliably detected, and both the pressure gauge and the flow meter are reliable as detection means. The effect which can improve property is acquired.

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 are views showing a can manufacturing apparatus according to an embodiment of the present invention.
The can manufacturing apparatus 10 of this embodiment shown in FIG. 1 is for processing a bottomed cylindrical can 1a in order, and the apparatus main body 11 includes a rotating disk 12 and a processing machine 13.
As shown in FIG. 2, the rotating disk 12 is provided on the outer periphery of the center shaft portion 12 a and is supported so as to be rotatable around the center axis. The rotating disk 12 includes a plurality of holding mechanisms 70 in the circumferential direction. Are provided for each angle α.
The holding mechanism 50 is provided with a can bottom holding portion 20 for holding the can 1a, and an expandable ring 30 for holding the can 1a by bulging or shrinking in the radial direction.
The rotating disk 12 rotates counterclockwise as indicated by an arrow for each angle at which the can bottom holding portion 20 and the expansion ring 30 are provided. When the expansion / contraction ring 30 is positioned at the can supply position X, the can bottom holding unit 20 and the expansion / contraction ring 30 are transferred to the can bottom holding unit 20 and the expansion / contraction ring 30 by the can 1a serving as a work by the supply mechanism 50. Holds the can 1a.
The supply mechanism 50 receives the cans 1a one by one each time the cans 1a are supplied from the direction of the arrow A shown in FIG. 2, and the can supply position X while rotating the received cans 1a in synchronization with the rotation pitch of the rotary disk 12. Is transferred to the can bottom holding part 20 and the expansion / contraction ring 30.

  On the other hand, as shown in FIG. 1, when the can bottom holding part 20 holding the can 1a is positioned at a predetermined position by the rotation of the rotating disk 12, the processing machine 13 can move the can bottom holding part 20 and the expansion ring. By moving toward the can 1a held by 30, the can is subjected to predetermined processing. Although not shown in detail in FIG. 1, when the bottle can 1 is manufactured as the processing machine 13, for example, a plurality of squeezing and squeezing processes that are formed into a bottomed cylindrical shape having a predetermined length by repeating squeezing and squeezing processes, for example. A processing portion, a neck-in processing portion that forms a base portion by reducing the diameter of the bottomed cylindrical tip opening portion, a threading processing portion that performs threading processing to be screwed with a cap on the outer periphery of the base portion, a bottle can 1 In order to have the same overall length (overall height), it has various processing parts such as a trimming processing part that cuts the tip opening, and each of these processing parts is synchronized with the rotational pitch of the rotating disk 12 as a whole. As shown by arrow C in FIG.

That is, in FIG. 2, the rotary substrate 12 is rotated by an angle α, and when the can bottom holding part 20 and the expansion / contraction ring 30 are located at the can supply position X, the can 1a is transferred by the supply mechanism 50. Hold.
The can 1a is moved each time it is sequentially rotated by one pitch while being held by the can bottom holding portion 20 and the expansion ring 30, and a predetermined processing is performed by the processing machine at the moved position, thereby opening the tip. A bottle can 1 having a desired shape having a base portion is obtained. The bottle can 1 is made of a material made of aluminum or an alloy thereof.

  Further, as shown in FIG. 2, the can bottom holding portion 20 that holds the bottle can 1 that has been processed and the expansion ring 30 are positioned at the can discharge position Y by the rotation of the rotating disk 12, so that the can bottom holding is performed. When the bottle can 1 held by the portion 20 and the expansion / contraction ring 30 is received by the take-out mechanism 60, the bottle can 1 becomes empty. The take-out mechanism 60 rotates in synchronization with the rotation pitch of the rotary disk 12. When the bottle can 1 is received from the can bottom holding part 20 and the expansion / contraction ring 30 at the can discharge position Y while rotating, the bottle can 1 is sequentially discharged in the direction of arrow B.

Then, in the rotating disc 12, the can bottom holding portion 20 and the telescopic ring 30 in an empty state are further moved by the rotation of the rotating disc 12 and reach the can supply position X again, as described above. The can 1a supplied from the mechanism 50 is held, and this operation is repeated thereafter.
On the rotating disk 12, a plurality of expansion rings 20 and can bottom holding portions 30 are also arranged between the can supply position X and the can discharge position Y at the same predetermined interval.
Accordingly, when the bottle can 1 is delivered by the supply mechanism 50, it has not yet reached the shape of the bottle can, and is merely in the shape of the bottomed cylindrical can 1a. It will be formed into a literal bottle can shape.

  As shown in FIG. 3, the can bottom holding portion 20 is formed in a cylindrical shape and is attached to the rotating disk 12. The can bottom holding part 20 has a shallow cup shape.

The can bottom holding part 20 is provided with a recessed part 21 formed to be recessed in such a size that the can bottom 2 of the bottle can 1 can be fitted therein. The can bottom holding part 20 includes the recessed part 21. The can bottom 2 is held by fitting the can bottom 2 inside. The recess 21 has a flat plate seat 22 for receiving a protrusion 2a provided downward on the inner peripheral side of the bottom 2 of the bottle can 1, and an inclination for receiving an inclined part 2b provided on the outer peripheral surface of the protrusion 2a. It has a receiving seat 23 and a fitting insertion wall 24 for fitting the periphery of the can bottom 2 side, and has a shape substantially corresponding to the can bottom 2 of the bottle can 1.
Further, the can bottom holding part 20 is attached with a can bottom receiving member 16 having a tip surface 17 formed in a spherical surface having a shape substantially corresponding to the surface of the center part of the can bottom 2.
The can bottom receiving member 16 is inserted through the center portion of the can bottom holding portion 20, and the front end surface 17 of the can bottom receiving member 16 is provided so as to protrude into the recessed portion 21.

  On the other hand, an expansion ring 30 for holding the can body 3 of the bottle can 1 is provided on the inner side surface of the can bottom holding portion 20. The expansion / contraction ring 30 has an annular shape made of, for example, a rubber material. This can bottom holding part 20 has a flow path 31 into which air flows. When the can bottom 2 of the bottle can 1 is held in the can bottom holding part 20 as shown in FIG. 3, when air is supplied into the flow path via a plug (not shown), the expansion ring 30 The can body 3 is held by bulging to the inner peripheral side and surrounding the periphery of the can body 3 from the outside.

In this embodiment, as shown in FIG. 4, detection means 40 for detecting that the expandable ring 30 is broken is provided.
The detection means 40 measures a check passage 41 connected to a flow path 31 provided in the expansion ring 30, a supply device 44 that supplies low-pressure (for example, 0.01 MP) air, and an internal pressure in the expansion ring 30. And a flow meter 43 that measures the amount of air flowing into the telescopic ring 30.

  As shown in FIG. 4, the detection means 40 is provided at an adjacent position closer to the can supply position X than the can discharge position Y.

Since the can manufacturing apparatus 10 of this embodiment is configured as described above, its operation will be described below.
In FIG. 2, when the supply mechanism 50 is supplied from the direction of arrow A, the can 1a is received while the supply mechanism 50 rotates, and the can bottom positioned at the can supply position X on the rotating disk 12 By feeding into the holding part 20 and the expansion / contraction ring 30, the can bottom holding part 20 and the expansion / contraction ring 30 hold the can 1a.
That is, the can bottom holding part 20 fits and holds the can bottom of the can 1a, and the expansion ring 30 prevents the inside by supplying air, thereby holding the can body 3 from the outer peripheral direction.

When the can bottom holding part 20 and the expansion / contraction ring 30 holding the can 1a move by rotating the rotating disk 12 by one pitch at a time for each angle α, the processing machine 13 moves forward each time and the can By performing predetermined processing on 1a, a bottle can 1 having a shape as shown in FIG. 3 is obtained.
When the can bottom holding part 20 and the expansion ring 30 that have been processed with respect to the bottle can 1 are positioned at the can discharge position Y, the take-out mechanism 60 removes the bottle can from the can bottom holding part 20 and the expansion ring 30. 1 is received and sent out in the direction of arrow B.

After that, the expandable ring 30 from which the bottle can 1 has been taken out is directed toward the can supply position X by the rotation of the rotating disk 12.
At that time, when the expansion / contraction ring 30 moves to the position Z next to the can discharge position Y, the check passage 41 of the detection means 40 is connected to the flow path 31 of the expansion / contraction ring 30 as shown in FIG. Since air is supplied to the use passage 41, the air is sent to the expansion / contraction ring 30 through the check passage 41 and the flow path 31.

  And since the detection means 40 includes the pressure gauge 42, when air is supplied to detect breakage, if the expansion / contraction ring 30 is broken, the pressure does not increase. Damage can be reliably detected. Further, since the flow meter 43 is also included, when air is supplied to the expansion / contraction ring 30 in order to detect breakage, if the expansion / contraction ring 30 is broken, the fluid flows out. The breakage of the expansion / contraction ring 30 can be reliably detected. Therefore, the breakage of the expansion / contraction ring 30 can be reliably detected, and the reliability as the detection means can be enhanced.

Therefore, according to this embodiment, when the expansion / contraction ring 30 does not hold the bottle can 1, the air is supplied to the expansion / contraction ring 30 in that state to detect breakage of the expansion / contraction ring 30. It is possible to easily identify the expansion / contraction ring 30 in which damage has occurred without checking all the expansion / contraction rings 30 one by one.
As a result, it is possible to prevent the quality of the bottle can 1 from deteriorating and to prevent the operating rate of the apparatus from degrading by quickly replacing the damaged expansion / contraction ring. Therefore, the reliability of the device can be increased.

Moreover, in the apparatus main body 11, if the detection means 40 is provided in the position between the can supply position X on a rotation disc, and the can discharge position Y which finished processing, the expansion-contraction ring which is damaged is easy. In addition, the air can be detected without being supplied to each of the expansion / contraction rings 30 holding the bottle can 1 one by one, so that the detection can be easily performed.
Moreover, the detection means 40 supplies air having a pressure lower than a predetermined pressure required for holding the bottle can 1 to the expansion ring 30 at the time of detection, so that the expansion means 30 is inward when the expansion ring 30 is not damaged. There is no risk of bulging and there is no risk of breakage.

  When the detecting means 40 is provided with alarm means for issuing an alarm when the breakage of the expansion / contraction ring is detected, or provided with an emergency stop means for stopping the rotation of the rotating disk 12, the expansion / contraction ring is damaged. On the other hand, since the can is not supplied, it is possible to prevent the can from being scratched and to further increase the reliability of the apparatus.

In the above embodiment, an example in which both the pressure gauge and the flow meter are used as the detecting means to accurately detect the breakage of the expansion / contraction ring has been shown. However, the detection can be performed only by providing at least one of them. However, the present invention is not limited to the illustrated embodiment. In addition, an example was shown in which an air pressure of 0.3 MPa was supplied as a predetermined pressure necessary to hold the can, and an air pressure of 0.1 MPa was supplied as an air pressure supplied at the time of detection. The size of the air pressure may be appropriately selected depending on the material constituting the expansion ring, the material and thickness of the can as a workpiece, and therefore the air pressure for detection is large enough that the expansion ring does not elastically recover. A low pressure that does not swell is sufficient.
And although the example which used air in order to operate an expansion-contraction ring was shown, fluids, such as oil pressure, can also be used, for example, and are not limited to the example of illustration. Moreover, although the example applied to the bottle can filled with drinking water etc. was shown, even if it applies to the apparatus which manufactures not only a bottle can but the cylindrical can which does not have a nozzle | cap | die part, the same effect is obtained. Of course, it can also be applied to the production of cans other than materials made of aluminum or its alloys.
Moreover, in this embodiment, although the detection means 40 is installed in the position of Z, as long as it is between the can discharge position Y and the can supply position X, any location may be sufficient.

It is a side view which shows the manufacturing apparatus of the can which concerns on one embodiment of this invention. It is explanatory drawing which looked at the rotary disk in the manufacturing apparatus of a can from the front. It is an enlarged explanatory view showing a can bottom holding portion and an expansion / contraction ring provided on the rotating disk. It is expansion explanatory drawing which shows a detection means. It is explanatory drawing of the principal part which shows the manufacturing apparatus of the conventional can.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bottle can 10 Manufacturing apparatus 11 Apparatus main body 12 Rotating disc 30 Expansion ring 40 Detection means 41 Check passage 42 Pressure gauge 43 Flow meter

Claims (6)

A rotating disk that rotates intermittently around the central axis and an annular shape that surrounds the can body, and a plurality of them are arranged at the same radial position on the rotating disk, and a predetermined pressure supplied inside An expansion ring that bulges inward by a fluid and holds the can body of the can, and the expansion ring holds the can when the expansion ring is positioned at a can supply position by the rotation of the rotating disk. In addition, when the expansion ring that has finished processing the can is positioned at the can discharge position by the rotation of the rotating disk, the processed can is discharged from the expansion ring. In the can manufacturing apparatus,
A can manufacturing apparatus comprising: a detecting means for supplying fluid to the expansion ring to detect breakage of the expansion ring. The can manufacturing apparatus according to claim 1,
In the apparatus main body, the detection means is provided at a position where the rotating disk reaches between the can discharge position and the processed can supply position. In the can manufacturing apparatus according to claim 1 or 2,
The detection device is a can manufacturing apparatus, wherein the fluid supplied to the telescopic ring is a pressure lower than the predetermined pressure. In the can manufacturing apparatus according to any one of claims 1 to 3,
The can manufacturing apparatus according to claim 1, wherein the detecting means includes a pressure gauge for detecting fluid pressure. In the can manufacturing apparatus according to any one of claims 1 to 3,
The can manufacturing apparatus according to claim 1, wherein the detecting means includes a flow meter for detecting a flow rate of the fluid. In the can manufacturing apparatus according to any one of claims 1 to 3,
The said detection means contains the pressure gauge which detects the fluid, and the flowmeter which detects the flow volume of the fluid, The manufacturing apparatus of the can characterized by the above-mentioned.

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