JP4166534B2 - Can feed line can feed control method and control system - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a can feed control system and a can feed control method, and more specifically, for example, to a can transfer line used in a filling device for filling a liquid into a can or a rinser for washing the inside of an empty can. The present invention relates to a can feed control system and a can feed control method for controlling stop and start of empty can feed without damaging the empty can.
[0002]
[Prior art]
For example, in the manufacturing process of canned beer, as shown in FIG. 1, a large number of empty cans a are sent to a position adjacent to the filling machine 2 in a line along a transfer line by an empty can transfer device, that is, a conveyor 1. One by one is cut out by the screw 4 and transferred one by one to the conveyor for the filling machine by the transfer mechanism 3. In such a can beer manufacturing process, if the downstream process is full of cans, the upstream process is short of cans, or an abnormality occurs in related equipment, empty Since it is necessary to temporarily stop the flow of cans, conventionally, a can stopper is provided on the transfer line to stop and stop empty cans that are being transferred, and the can stoppers stop and start the empty can feed. I try to control it.
[0003]
[Problems to be solved by the invention]
In the conventional empty can feed stop control system, the can stopper is provided only at one location near the transfer mechanism, and this conventional can stopper is indicated by 5 in FIG. 2 and FIG. In this way, it is arranged on both sides of the empty can conveyance line, and is made of a rubber elastic body 9 fixed to the bracket 6 by the fixtures 7 and 8, and is elastic by putting air into it. The body 9 is inflated and the elastic body is pressed against the side surface of the empty can, thereby holding the can from the side and stopping.
For this reason, when the feed speed of the empty can conveyance line is relatively low (for example, 1000 cpm or less), it is possible to simply stop the can stopper by operating it, but when the feed speed is high, the can can be damaged. In order to prevent this, it is necessary to operate the can stopper by decelerating the feed by the conveyor 1.
[0004]
However, in recent years, the feeding speed of the filling machine has also been increased, and as a result, the feeding speed of the empty can transport line by the conveyor 1 has also been increased to, for example, 2000 cpm, and the can stopper is operated in such a high speed feeding state. If you try to stop by pressing the empty can suddenly, there is a risk of damaging the empty can with the can stopper, and the empty can in the transport line is placed on a constantly moving conveyor and a constant feed force is applied. As a result, a large force is applied to empty cans in the transport line, particularly close to the can stopper, which may damage the empty cans. Further, in the structure of the above conventional can stopper, the stop position of the empty can cannot be made constant because of the structure, so that the leading can collides with the screw 4 provided at the inlet portion of the transfer mechanism 3 at the start of feeding and is damaged. There is a concern that, when the feeding of the can is stopped, the rear end of the can comes in contact with the can stopper and arrives at the can screw so that the screw does not enter smoothly and may be damaged.
On the other hand, if such high-speed feeding is once decelerated and then stopped by the can stopper, there is a problem that it is difficult to ensure high filling accuracy of filling by the filling machine.
[0005]
Further, such conventional rubber can stoppers are prone to wear due to repetitive operations and require frequent replacement. In addition, since the conventional can stopper is designed to push the substantially central side surface in the longitudinal direction of the empty can, there is a problem that the side wall is recessed in a thin can such as an aluminum can. In addition, in the manufacturing process of canned beer, it is necessary to periodically clean not only the filling machine but also the conveyor, etc. With conventional rubber can stoppers, for washing using hot water or chemicals, Since it lacks resistance, it is unsuitable for use in places that require such cleaning.
[0006]
The present invention has been made in view of the problems of a conventional can feed control system using a can stopper, and is capable of reliably controlling stop and start of can feed without damaging the can. An object of the present invention is to provide a can feed control system for a line and a can feed control method in a can transport line.
Another object of the present invention is to provide a can feed control system for a can transport line and a can feed in the can transport line that can accurately regulate the stop position of the can by the can stopper and prevent the can from being damaged by the screw on the downstream side. It is to provide a control method.
At least two can stoppers are separated along the transport line, and the downstream can stopper precisely regulates the can stop at the position immediately upstream of the screw, thereby delaying the rearmost can It is providing the can feed control system for can conveyance lines and the can feed control method in a can conveyance line which can prevent the damage generation | occurrence | production by a screw by eliminating.
[0007]
[Means for Solving the Problems]
The invention of the present application is a can feed control system for a can transport line,
At least two can stoppers are provided separated in the can feed direction of the transfer line,
The can stopper on the downstream side in the can feed direction is provided with a position restricting member that restricts the stop position of the can, and an actuator that moves the position restricting member between the restricting position and the retracted position,
After operating the upstream can stopper among the can stoppers, after discharging the can located downstream from the upstream can stopper to a subsequent process, operating the downstream can stopper, and then It is comprised so that the holding | suppressing of the can by the upstream can stopper may be cancelled | released.
Further, the present invention is a can feed control method in a can transport line,
At least two can stoppers are provided separated in the can feed direction of the transfer line,
After operating the upstream can stopper among the can stoppers, after discharging the can located downstream from the upstream can stopper to a subsequent process, operating the downstream can stopper, and then It is configured to release the holding of the can by the upstream can stopper and regulate the stop position of the can by the downstream can stopper.
According to the present invention, since the can stop position can be accurately regulated in the can conveyance line, it is easy to take the timing of cutting by the screw provided in the conveyance line when starting feeding from the can feed stop state, The can can be prevented from being bitten by the screw.
[0008]
In the can feed control system for the can transport line or the can feed control method in the can transport line, the can that has passed through the upstream can stopper after releasing the holding of the can by the upstream can stopper When the amount reaches a predetermined amount determined by the distance between the upstream can stopper and the downstream can stopper, the can feeding may be stopped again by operating the upstream can stopper. Thereby, it is possible to prevent the deformation of the can by preventing the application of an excessive pressing force acting on the most downstream can stopped by the downstream can stopper.
The can stopper on the upstream side in the can feeding direction is provided with a pressing member that contacts and presses the side surface of the can, and an actuator that presses the pressing member toward the can moving along the transport line. May be. Thereby, a can can be reliably controlled with a simple structure. Furthermore, the operation of the upstream can stopper and the operation of the screw may be linked to control the can more reliably and prevent the can from being damaged.
The operation of the screw provided on the downstream side of the downstream can stopper and cutting out the cans one by one from the transport line may be linked to the operation of the downstream can stopper. Accordingly, the can can be reliably cut out by the screw without being bitten by the screw.
Further, in the empty can feed control system for the empty can transfer line, the holding member of the upstream can stopper can be moved substantially at right angles to the feed direction of the transfer line on at least one side of the transfer line. And a lower presser member engageable with the bottom portion of the empty can, and the lower presser member and the lower presser member are arranged so as to be movable toward the empty can and relatively movable relative to the lower presser member, And an upper pressing member that presses the side surface of the upper portion of the can. In this case, a plurality of guide rods may be attached to the lower holding member in an upright state, and the upper holding member may be attached to be movable in the vertical direction.
According to the can feed control system, since the strongest part of the can, ie, the bottom part and the upper part of the can, is pressed, the can can be stopped without damaging the can. Since the parts move synchronously and hold the can, the can can be stably stopped. Moreover, since the said lower holding | suppressing part can move up and down relatively with respect to the said upper holding | suppressing part, it can respond to the cans from which height differs.
Furthermore, in the can feed control system for the can transport line, the pressing member and the position regulating member may be made of stainless steel. Thereby, there is little abrasion also by contact with a can, and it can reduce the necessity for part replacement as much as possible. Furthermore, it can withstand cleaning by using hot water or chemicals.
[0009]
【Example】
An embodiment of an empty can feed control system according to the present invention will be described below as a control system for an empty can conveyance line with reference to the drawings.
In FIG. 4, an embodiment of a can feed control system applied to an empty can conveyance line according to the present invention is shown generally at 100. The can feed control system of this embodiment is provided in association with an empty can conveyance line constituted by empty can conveyers 1. An empty can conveyor 1 (hereinafter simply referred to as a conveyor) 1 has a structure in which empty cans are placed on top and sent at a predetermined speed, and may be the same as the conventional conveyor shown in FIG. Accordingly, the same reference numerals are given in FIG. 4 and the detailed description of the structure and operation is omitted. The can feed control system 100 according to the present embodiment includes an upstream side, that is, a first can stopper 10, which is disposed at a position that is a desired distance upstream from the screw 4 provided at the downstream end of the conveyor, and a first can stopper 10. A downstream side, that is, a second can stopper 10 ′ is provided at a position downstream of the can stopper and immediately upstream of the screw 4.
[0010]
5 to 8, the upstream side of the present embodiment, that is, the first can stopper 10 is shown. This can stopper 10 is disposed on one side of the conveyor 1 that moves with the empty can placed thereon (lower side in FIG. 6 and left side in FIG. 7), and a support structure 20 fixed to the main body frame 11 of the conveyor, A lower pressing portion 30 supported by the support structure 20 so as to be movable substantially perpendicular to the conveying direction of the conveyor, an actuator 40 for pressing the lower pressing portion 30 toward the conveying path of the empty can, and the lower pressing portion 30 And an upper pressing part 50 arranged to be movable up and down.
[0011]
The support structure 20 includes a bracket 21 fixed to the side surface of the main body frame 11 of the conveyor 1 and a support plate 22 fixed to the bracket 21 in an upright state. A pair of holes 23 are formed in the support plate 22 so as to be separated in the lateral direction (left and right direction in FIGS. 5 and 6), and a bearing member 24 is attached in each hole. The bracket 21 and the support plate 22 are preferably made of stainless steel that does not easily rust. The lower pressing portion 30 includes a pair of shafts 31 slidably supported by the respective bearing members 24, a mounting plate 32 fixed to the shaft 31, and a lower pressing member 33 fixed to the mounting plate 32. ing. The lower pressing member 33 is made of stainless steel, and its planar shape is as shown in FIG. Both end portions 33a (left and right both ends in the figure) of the lower pressing member are thick (as viewed in the moving direction of the pressing member), and are fixed to the mounting plate 32 with set screws or the like at both ends. The pressing surface 33b of the pressing member is processed smoothly so as not to damage the can surface due to contact with the can. Guide rods 34 extending in the vertical direction are fixed to both end portions 33a of the lower pressing member. The upper ends of the guide rods 34 are integrally fixed to each other by a connecting plate 35. The length of the pressing member (the length along the moving direction of the empty can) is a length capable of holding a plurality (three in this embodiment) of empty cans.
[0012]
In this embodiment, the actuator 40 is composed of a fluid pressure cylinder in which the cylinder body 41 is fixed to the support plate 21 and the piston rod 42 is fixed to the attachment plate 32 via an arbitrary connector.
As shown in FIG. 8, the upper pressing portion 50 includes an upper pressing member 53 made of stainless steel in the same shape as the lower pressing member 33 of the lower pressing portion 30. A hole 54 penetrating vertically is formed at both ends of the upper pressing member 53, and the guide rod 34 penetrates the through hole 54. The upper pressing member 53 is freely movable in the vertical direction with respect to the guide rod 34. The pressing surface 53b of the upper pressing member 53 is also smoothly processed, and the upper surface of the empty can is pushed by the pressing surface. From both ends of the upper pressing member 53, plate-like protrusions 55 are provided so as to protrude in the longitudinal direction.
In the present specification, the bottom portion of an empty can is described with reference to FIG. 2. From the lower end portion of the cylindrical side wall b of the can a to the bottom portion (in this example, the outer peripheral portion has a conical shape). ) Refers to the part that moves to c, and this part is more resistant to external pressure than the central part of the cylindrical side wall b of the can. The upper portion refers to a portion that changes from the upper portion of the cylindrical side wall b to the conical portion d, and this portion is also stronger than the central portion.
[0013]
In the can stopper of the embodiment shown in FIGS. 5 to 8, lower guide rails 61 a and 61 b and upper guide rails 62 a and 62 b are arranged on both upper sides of the conveyor 1 (both sides of the transport path). One lower guide rail 61 a is disposed on the opposite side of the lower pressing portion 30 with the can a conveyed by the conveyor 1 interposed therebetween, and extends along the conveyor 1. The lower guide rail 61 a is fixed to the main body frame of the conveyor 1 by a mounting plate 63. The other lower guide rail 61b is disposed above the conveyor 1 on the side where the lower pressing portion 30 is provided, extends along the conveyor, and is fixed to the main body frame 11 via a mounting plate (not shown). As shown in FIG. 5, the lower guide rail 61 b is deformed upward at that position so as not to interfere with the lower pressing member 33 of the lower pressing portion 30.
The upper guide rails 62a and 62b are moved up and down by an elevating mechanism 70 together with a cover 64 disposed above the conveyor and extending along the conveyor. Therefore, the upper guide rails 62a and 62b are moved up and down by the lifting mechanism. There are several types of cans (shown here as three types) having different lengths (or heights), and the beer cans can be vertically adjusted to correspond to various types of cans. The lifting mechanism may be a fluid pressure cylinder or a combination of a screw shaft and a nut driven by an electric motor.
[0014]
5 and 8, the upper guide rail 62b on the upper pressing portion 50 side of the upper guide rail is deformed downward at that position so as not to interfere with the pressing member at a portion where the upper pressing member 53 is present. . A protrusion 66 extending at a right angle with respect to the longitudinal direction is provided at the end of the upper guide rail 62b on the upper pressing member 53 side, and a slit 67 is formed in the protrusion, and the upper pressing member 53 is formed in the slit. An end projection 55 is received. Thus, the upper pressing member 53 moves up and down together with the upper guide rail 62b, but is movable in the horizontal direction (direction toward the can conveyed by the conveyor) relative to the upper guide rail 62b. Reference numeral 68 denotes a top guide rail fixed integrally with the cover 64 and guides the top of the empty can to be conveyed. Reference numeral 69 denotes a housing covering the entire conveyor.
[0015]
In the can stopper 10 configured as described above, when a small empty can is conveyed by the conveyor 1, the upper guide rail is at the lowest position shown by the solid line in FIGS. 5 and 7, and the cover and the top guide rail correspond to it. It is in the position. Therefore, the upper pressing member 53 of the upper pressing portion, in which the protruding portion is received by the slit of the upper guide rail and held in the vertical direction by the upper guide rail, is also in the lowest position. In this state, when it is desired to temporarily stop the empty can a transported along the transport line by the conveyor 1, the actuator 40 is operated to push the lower pressing member 33 of the lower pressing portion 30 toward the empty can. The holding surface 33b of the holding member 33 comes into contact with the side surface of the bottom portion of the empty can a to stop the movement of the empty can. When the lower pressing member 33 moves, the guide rod 34 attached thereto also moves together, and the upper pressing member 53 connected to the pressing member via the guide rod also moves. For this reason, the pressing surface 53b of the pressing member comes into contact with the side surface of the upper portion of the empty can a and presses the empty can. In this way, the empty can can be prevented from falling because it is held at the lower and upper portions of the empty can. Moreover, since the strongest part of the empty can is pressed, the can is not deformed.
When the size of the empty can changes and the height changes, the upper guide rail is raised in accordance with the size of the empty can, whereby the holding member 53 of the upper holding portion 50 is also raised. Therefore, it becomes possible to hold down the portion of the can that is difficult to deform according to the size of the empty can, and there is no risk of scratching the can.
[0016]
The downstream side, that is, the structure and operation of the second can stopper 10 ′ is such that the lower pressing portion, the lower pressing member, the upper pressing portion, and the upper pressing member of the first can stopper portion 10 are respectively a lower position restricting portion and a lower position restricting portion. 9 and FIG. 10 show the planar shapes of the lower and upper pressing members as shown in FIGS. 9 and 10. Except for the differences, the structure and operation of the first can stopper are basically the same. Accordingly, the structure and operation of the different points will be described here, and the other description will be omitted.
That is, the lower position restricting member 33 'and the upper position restricting member 53' of the lower position restricting portion 30 'of the can stopper 10' are connected to the end portions of the can side surfaces 33b 'and 53b' ( 9 and 10, restriction protrusions 33 c ′ and 53 c ′ are respectively formed on the left end and the end closest to the screw. When the lower position restricting member 33 ′ and the upper position restricting member 53 ′ are moved to the restricting position by the actuator 40, the stop position of the can is restricted by the protrusion. Also, the can-side surfaces 33b 'and 53b' of the upper and lower position regulating members are not designed to press the side surfaces of the can when in the restricted position, and the can comes into contact with the protrusion and stops. ing. That is, when the position restricting member is in the restricting position, the empty can a can move between the position restricting member surfaces 33b 'and 53b' and the guide rails 61a and 62a, and abuts against the restricting protrusions 33c 'and 53c'. The movement stops when
[0017]
In the second can stopper 10 'of the present embodiment, the basic structure of the first can stopper 10 is used as it is, so that the lower pressing member of the lower pressing portion and the upper pressing member of the upper pressing portion as described above. However, each of the lower position restricting portions has a structure that merely replaces the lower position restricting member and the upper position restricting portion of the upper position restricting portion, but the original function of the second can stopper is to hold down the side of the can. Instead of stopping, it is not limited to the structure shown in the above-mentioned embodiment, because the stop position of the can is accurately regulated by projecting a portion such as a restricting protrusion into the transfer path of the can. Any structure may be used as long as the structure can be regulated.
For example, in the above embodiment, the lower position restricting member 33 ′ and the upper position restricting member 53 ′ may be short in the can conveying direction, and as shown in FIG. The position restricting member 33 ″ having the position restricting portion 33c ″ for restricting the position of the can is operated by an actuator 40 ″ such as a fluid pressure cylinder in a direction substantially perpendicular to the can conveying direction. But it ’s okay.
[0018]
The screw 4 has a known structure in which the empty can a is cut out in the axial direction of the screw by a spiral groove 4a formed on the outer periphery by rotation and is sent separately from the continuously arranged empty cans. However, when the second can stopper 10 'is opened and the empty can reaches the position of the screw 4, the empty can bites into the screw 4 if it does not align with the position of the tip of the spiral groove 4a (the right end in FIG. 4). In rare cases, not only can the empty can be damaged, but also the empty can cannot be smoothly fed. Therefore, in this embodiment, the rotational movement of the screw and the opening / closing operation of the second can stopper are considered in consideration of the feed speed of the conveyor 1, and the position restricting member of the second can stopper 10 'is retracted by the actuator. The empty can starts to move and is synchronized so that the empty can enters the tip of the spiral groove when the position of the screw 4 is reached.
[0019]
Next, the operation of the can feed control system of this embodiment will be described with reference to FIG.
During normal operation of the transport line, the upstream side, ie, the first can stopper 10 and the downstream side, ie, the second can stopper 10 ′, are in an inoperative state, and the empty can a is a conveyor as shown by A in FIG. 1 is continuously fed to the position of the screw 4. When it is desired to stop the feeding of the empty can that is being sent on the transport line, first, the first can stopper 10 is operated to hold the empty can, and as shown by B, the empty can on the upstream side of the first can stopper The flow of is stopped. However, since the conveyor 1 is being fed in this state, the empty can located downstream from the first can stopper 10 is fed to the screw 4 through the second can stopper 10 'which is inactive. Then, it is continuously sent from the screw to the filling machine 2 through the transfer mechanism (C in FIG. 12), and is discharged.
[0020]
As indicated by D in FIG. 12, after all empty cans a downstream of the first can stopper 10 have been dispensed, the second can stopper 10 'is actuated and moved by the position restricting members 33' and 53 '. The flow of the empty can a is stopped and the stop position of the empty can can be regulated. Thereafter, as indicated by E, the first can stopper 10 is in an inoperative state, and the empty can a stopped by the can stopper 10 starts to flow toward the second can stopper 10 '. The state-of-the-art empty can is engaged with the restricting protrusion of the position restricting member to restrict the stop position. When an empty can of a predetermined amount (an amount determined in relation to the distance L between the first can stopper and the second can stopper and the diameter of the empty can) passes through the first can stopper, as indicated by F, The first can stopper operates to hold the empty can and stop the flow of the empty can upstream of it. At this time, the final can of the empty can that has passed through the first can stopper 10 and stopped by the second can stopper 10 'and the empty can at the tip stopped by the first can stopper Determines the predetermined amount so that a gap is formed. This completes stopping the empty can feed.
[0021]
When starting the feeding of empty cans by the empty can conveyance line, first, as shown by G in FIG. 12, the operation of the second can stopper 10 'is stopped to move the position restricting members 33' and 53 'to the retracted position. To start feeding empty can a. Thereafter, as indicated by H, the operation of the first can stopper 10 is stopped and the holding of the can by the pressing members 33 and 53 is released. Then, since the feeding speed of the conveyor 1 is slightly faster than the cutting speed of the empty can by the screw 4 originally, the empty can a stopped by the first can stopper 10 catches up with the preceding empty can, and FIG. As shown in the above, it continues continuously. The time lag until the first can stopper releases the hold after the second can stopper releases the stop of the empty can is the feed speed of the conveyor 1 and the empty can supply stop state shown in FIG. The distance between the last empty can stopped by the second can stopper 10 ′ and the most recent (downmost downstream) empty can stopped by the first can stopper 10 And determined by.
[0022]
【The invention's effect】
(A) Since the can stop position can be accurately regulated in the can conveyance line, it is easy to take the timing of cutting by the screw provided in the conveyance line when feeding is started from the can feed stop state. Biting can be prevented.
(B) When the empty can is stopped in the can conveyance line, it is possible to prevent the deformation of the can by preventing the application of an excessive pressing force acting on the most downstream can.
(C) The operation of the screw and the operation of the can stopper are interlocked so that the can can be reliably cut out by the screw without being bitten by the screw.
[Brief description of the drawings]
FIG. 1 is a schematic diagram of a can beer production process equipped with a conventional can conveyance line.
FIG. 2 is a front view of a conventional can stopper.
FIG. 3 is a side view of the can stopper of FIG. 2;
FIG. 4 is a diagram showing an entire can feed control system according to the present invention.
FIG. 5 is a side view of the upstream side or first stopper used in the can feed control system shown in FIG. 4;
6 is a plan view of the first can stopper of FIG. 5 as viewed along line AA in FIG. 7;
FIG. 7 is a longitudinal sectional view of the first can stopper of FIG. 5;
FIG. 8 is a view taken along line BB in FIG. 7;
FIG. 9 is a plan view of the lower position regulating member on the downstream side, that is, the second can stopper.
FIG. 10 is a plan view of an upper position regulating member of a second can stopper.
FIG. 11 is a perspective view showing a modified example of the second can stopper.
FIG. 12 is an operation explanatory diagram of the can feed control system.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Conveyor 11 Main body frame 10 1st can stopper 10 '2nd can stopper 20 Support structure 21 Bracket 22 Support plate 30 Lower press part 30' Lower position control part 32 Mounting plate 33 Lower press member 33 'Position control member 33 ″ Position restricting member 40 Actuator 50 Upper pressing portion 50 ′ Upper position restricting portion 53 Upper pressing member 53 ′ Upper position restricting members 61a and 61b Lower guide rails 62a and 62b Lower guide rails

Claims (5)

In the can feed control system for the can transport line,
At least two can stoppers are provided separated in the can feed direction of the transfer line,
The can stopper on the downstream side in the can feed direction is provided with a position restricting member that restricts the stop position of the can, and an actuator that moves the position restricting member between the restricting position and the retracted position,
After the can stopper on the upstream side of the can stopper is operated to stop the feeding of the can, the can on the downstream side of the upstream can stopper is discharged to a subsequent process, and the downstream can stopper is Operate to stop feeding the can, and then release the can holding by the upstream can stopper,
Furthermore, when the can passing through the upstream can stopper reaches a predetermined amount determined by the distance between the upstream can stopper and the downstream can stopper, the upstream can stopper is operated again to A can feed control system characterized by stopping feed.   2. The can feed control system for a can transport line according to claim 1, wherein the can stopper on the upstream side in the can feed direction is pressed against a side surface of the can and the press member is transported. A can feed control system comprising an actuator for pushing toward a can moving along a line.   3. A can feed control system for a can transport line according to claim 1, wherein the screw is provided on the downstream side of the downstream can stopper, and the screw operates to cut out the cans one by one from the transport line. A can feed control system, wherein the operation of the downstream can stopper is interlocked. A can feed control method in a can transport line,
At least two can stoppers are provided separated in the can feed direction of the transfer line,
After the can stopper on the upstream side of the can stopper is operated to stop the feeding of the can, the can on the downstream side of the upstream can stopper is discharged to a subsequent process, and the downstream can stopper is The can can be stopped by operating, after which the can holding by the upstream can stopper is released, the can stop position is regulated by the downstream can stopper,
Furthermore, when the can passing through the upstream can stopper reaches a predetermined amount determined by the distance between the upstream can stopper and the downstream can stopper, the upstream can stopper is operated again to A can feed control method characterized by stopping feed.   5. A can feed control method for a can conveyance line according to claim 4, wherein the screw is provided on the downstream side of the downstream can stopper and cuts the cans one by one from the conveyance line, and the downstream can stopper. A can feed control method characterized in that the operation of the can is linked.

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