JP2842017B2 - Diameter expansion device for cans - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for reducing the diameter of a can, for example, for performing drawing and flanging on the open end of a can, for example, a can filled with beverages. In particular, the present invention relates to a diameter reduction / expansion apparatus suitable for test processing of cans.

[0002]

2. Description of the Related Art Usually, the open end of a can for filling a beverage is
To attach the lid, drawing is performed first, and then flange processing is performed. The drawing and the flange processing are performed by a plurality of forming devices provided on the production line for the can.

[0003] In recent years, cans of various shapes have been manufactured from the viewpoint of diversification of filling materials and design economics. Test processing is performed to set processing conditions. Further, it is necessary to carry out test processing in order to improve the defect of the production line.

[0004]

However, conventionally,
Since the drawing and flange processing are performed by the molding equipment provided on the production line, the processing of the product on the production line must be temporarily stopped when performing the above-mentioned test processing, which requires a large amount of test processing. There is a problem that it becomes.

If a molding device similar to that of a production line is provided only for test processing, such a problem can be solved, but this molding device is expensive and wasteful.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a diameter reducing / expanding apparatus which is less expensive and simpler in structure than that provided on a production line.

[0007]

SUMMARY OF THE INVENTION A diameter reducing and expanding apparatus according to the present invention comprises a diameter reducing apparatus for successively drawing the opening end of a can in multiple stages, and a flange on the opening end of the can discharged from the diameter reducing apparatus. A diameter increasing device for processing, and a diameter reducing device for a can including a conveying path provided between the diameter reducing device and the diameter increasing device,

[0008] The diameter reducing device includes a plurality of first holding portions that are arranged on a base in one direction and hold a bottom of the can.
A plurality of reduced diameter dies provided on the base opposed to these first holding portions and advanced toward the first holding portion to sequentially reduce the opening end of the can in multiple stages are arranged adjacent to the can. Transport means for intermittently transporting to the first holding unit, and reduced-diameter die driving means for simultaneously driving the respective reduced-diameter dies forward and backward,

The reduced diameter die includes an outer die fitted on the outer peripheral side of the open end of the can, and an inner die fitted on the inner peripheral side of the open end of the can.

The reduced-diameter die driving means includes a rotatable first cam to which the outer die is slidably engaged, and a rotatable second cam to which the inner die is slidably engaged. With a cam,

The diameter expanding device includes a plurality of second holding portions rotatably arranged with respect to the base and holding a bottom of the can, a die holder that rotates integrally with the second holding portions, A plurality of enlarged dies attached to the die holder opposite to the second holding portion and advancing toward the second holding portion to increase the diameter of the open end of the can; and A third cam that moves forward and backward with respect to the die holder in conjunction with rotation of the die holder and the second holding unit;

The first holding unit, the reduced diameter die and the second holding unit are provided with pressure detecting means for detecting a pressing force acting in the axial direction when the diameter is reduced and the diameter is expanded. Features.

[0013]

According to the diameter reducing / expanding apparatus of the present invention, drawing is performed by the diameter reducing apparatus, and further, flange processing is performed by the diameter expanding apparatus.

In the diameter reducing device, the can to be formed is supported by the first holding portion with the bottom held, and the diameter reducing die is advanced by the diameter reducing die driving means toward the open end of the supported can. And the diameter of the opening end is reduced. The can whose diameter has been reduced in the previous stage is intermittently conveyed to the adjacent first holding unit by the conveying means, and when the diameter reducing die is advanced next, the next stage of diameter reduction is performed. In this manner, by arranging a plurality of diameter reducing dies along the direction of transport of the can and simultaneously advancing the plurality of diameter reducing dies, the opening end of the can is sequentially reduced in diameter.

In the diameter increasing device, the bottom portion is held and supported by the second holding portion, and the diameter expanding die attached to the die holder is directed toward the open end of the supported can by the die holder and the second holder.
In response to the rotation of the holding portion, the opening is advanced by the diameter-enlargement die driving means, and the diameter of the open end is enlarged. As described above, the diameter of the opening end of the can is increased by moving the diameter-enlarging die forward in association with the transport operation of the can.

[0016]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a first embodiment of the present invention;

FIGS. 1 and 2 show a diameter reducing and expanding apparatus according to this embodiment.
As shown in FIG. 1, a diameter reducing device 1 for sequentially drawing the opening end of the can C in multiple stages, a diameter expanding device 3 for performing flange processing on the opening end of the can C discharged from the diameter reducing device 1, A transport path 2 is provided between the diameter reducing device and the diameter expanding device.

As shown in FIG. 3, the diameter reducing device 1 includes a first shaft 15 rotatably supported on the base 4 and driven to rotate, a plate member 5 fixed to the base 4, Four pads (first holding portions) 6 arranged side by side in one direction toward the circumferential direction of the plate member 5 and holding the bottom of the can C
And a plurality of reduced diameter dies 7 provided on the base 4 so as to face the pads 6 and advanced toward the pads 6 to sequentially reduce the opening end of the can in multiple stages, and the can C is adjacent to the cans C. Transport means 8 for intermittently transporting to the pad 6;
And a reduced-diameter die driving means 9 for simultaneously driving the dies. A shooter 77 is attached to the first pad 6 of the diameter reducing device 1.
The can C is dropped into the inside, and the can C is supplied to the diameter reducing device 1.

The diameter reducing die 7 includes an outer die 10 fitted on the outer peripheral side of the open end of the can and an inner die 11 fitted on the inner peripheral side of the open end of the can.

The outer mold 10 is provided with a cylindrical member 12 interposed therebetween.
The holder member 1 is fixed to a holder member 14 attached to the shaft 15 so as to be movable in the axial direction.
A cam follower 16 is fixed to a rear end of the cam 4.

The inner die 11 is attached to the tip of a cylindrical shaft member 13 which is coaxially inserted into the cylindrical member 12 so as to be able to advance and retreat. A cam follower 17 is fixed to the rear end of the shaft member 13. Have been.

The reduced-diameter die driving means 9 includes the outer die 10.
The rear cam follower 16 is slidably engaged,
A first cam 18 fixed to the shaft 15 and a cam follower 17 at the rear end of the inner mold 11 are slidably engaged with each other, and a second cam 19 fixed to the shaft 15 is provided.
And The first cam 18 and the second cam 19
Have a phase difference from each other, and the outer mold 10 and the inner mold 11 are moved forward and backward with a phase difference therebetween. For example, when the inner mold 11 is advanced and fitted to the open end of the can C, the outer mold 10 is advanced toward the open end of the can C and the outer mold 10 is fitted to the open end. Alternatively, the inner mold 11 may be retracted.

The transport means 8 includes a cylindrical member 20 rotatably mounted on the shaft 15 and a pocket 22 mounted on the peripheral edge of the cylindrical member 20 for holding the body of the can C. The plate member 21 is formed, and the can C is conveyed by intermittently rotating the cylindrical member 20.

An introduction passage 23 for introducing compressed air is formed in the hollow portion of the shaft member 13. When the reduced diameter die 7 is advanced, the compressed air is guided from the introduction passage 23.
It is blown out from the reduced diameter die 7 to fill the inside of the can C to be drawn. The timing of jetting the compressed air can be set by a VARICAM.

Between the plate member 5 and the pad 6, when the reduced diameter die 7 is fitted to the can C, the pressing force of the bottom of the can C exerted on the pad 6 in the axial direction of the can C is detected. A load cell (pressure detecting means) 25 is mounted. Further, the cylindrical member 12 to which the outer mold 10 is attached has:
A load cell (pressure detecting means) 24 for detecting the axial pressing force of the can C acting on the tubular member 12 when the outer mold 10 is fitted to the can C is attached. Molding data is obtained based on the pressing forces on these load cells 24 and 25.

As shown in FIG. 1, the transport path 2 is constituted by a shooter 30 having an entrance facing the downstream side of the last pad 6 in the diameter reducing device 1. The exit of the shooter 30 is The can C discharged from the diameter reducing device 1 is connected to the diameter expanding device 3, falls in the shooter 30, and is conveyed to the diameter expanding device 3.

As shown in FIG. 4, the diameter expanding device 1 includes a second shaft 31 rotatably supported by the base 4 and driven to rotate, and a plate-like member coaxially fixed to the shaft 31. 32, and a shaft 3
2, two pads (second holding portions) 33 that are provided in the radial direction and hold the bottom of the can C, a die holder 34 that rotates integrally with these pads 33,
A plurality of diameter-enlarging dies 35 attached to the die holder 34 so as to advance toward the pad 33 and expand the diameter of the open end of the can C;
And a third cam 36 that moves forward and backward with respect to the die holder 34 in conjunction with the rotation of the and the plate-shaped member 32. A chute 79 is attached so as to face the rotational path of the pad 33 in the diameter expanding device 3.
The can C, which has been subjected to the flange processing by the diameter expanding device 3, is dropped and discharged inside the inside 9.

The diameter expanding die 35 has a cylindrical member 42 attached to the die holder 34 so as to be able to advance and retreat, a shaft member 37 rotatably attached to the cylindrical member 42, and fixed to the tip of the shaft member 37. A molding die 38, a gear 39 fixed to the rear end of the shaft member 37, a gear 40 attached coaxially to the second shaft 31 and meshing with the gear 39, and rotating the gear 40. And a cam follower 43 attached to the rear end of the cylindrical member 42.
And

The cam 36 is fixed to the base 4 via a cylindrical member 44, and the cam follower 43 is engaged with the cam 36. By rotating the shaft 31, the cam 36 is rotated. And when the die holder 34 is rotated,
In conjunction with this rotation, the diameter of the die 3 is increased with respect to the die holder 34.
5 is advanced and retracted, and the flange 38 is formed by the forming die 38 of the enlarged diameter die 35.

At the center of the shaft member 37 of the diameter expanding die 35, an introduction passage 45 through which compressed air is guided is formed.
When the diameter-enlargement die 35 is advanced, compressed air is ejected from the introduction path 45 to fill the inside of the can C.

Between the plate-shaped member 32 and the pad 33, the pressing force of the bottom of the can C exerted on the pad 33 in the axial direction of the can C when the enlarged diameter die 35 is fitted to the can C is detected. A load cell (pressure detecting means) 45 is attached. Processing data is obtained based on the pressing force of the load cell 45.

A suction device (not shown) is connected to the pad 33, and the suction device suctions the bottom of the can C so that the can C does not rotate during flange processing.

FIGS. 1 and 5 show the driving system of this embodiment.
It will be described based on.

An electric motor 50 with a speed reducer is mounted on the base 4, and the rotating shaft of the electric motor 50 is
A pulley 51 rotatably fixed to the base 4 is connected via a timing belt 52. This pulley 51
Is connected to a pulley 53 fixed to the first shaft 15 via a timing belt 54.

A shaft member 55 is coaxially fixed to the pulley 51. The shaft member 55 is rotatably supported on the base 4 via a bearing 56. The shaft member 55 is connected to an input end of a gear box 58 via a clutch 57. A shaft member 59 is connected to an output end of the gear box 58 via a clutch 60.
And is rotatably supported by the base 4 via the. Shaft member 5
9, a pulley 62 is fixed.
Is an index gear 64 via a timing belt 63
Of the index gear 64
Is connected to a pulley 66 via a timing belt 65.
Is connected to The pulley 66 is fixed to a shaft member 67, and the shaft member 67 is connected to the cylindrical member 20 via a belt 68. When the input end of the index gear 64 makes one rotation, the cylindrical member 20 is rotated.
Is inserted into the drive system so that the motor rotates intermittently.

As described above, the pulley 53 is fixed to the first shaft 15, as shown in FIG. 2, and the pulley 69 is fixed to the first shaft 15. The pulley 69 is connected via a timing belt 70 to a pulley 71 fixed coaxially to the second shaft 31.

An electric motor 73 which is driven independently of the electric motor 50 is attached to the base 4, and a pulley 74 is fixed to a rotating shaft of the electric motor 73. Is connected to a pulley 76 via a timing belt 75. The rotating shaft of the pulley 76 is connected to the gear 41 via a timing belt 77, as shown in FIG.

A gear 78 is coaxially fixed to the end of the first shaft 15, and the gear 68 is engaged with a gear 80 connected to a handle 79.
By rotating the handle 79, the first and second shafts 15, 31 can be manually rotated without using the electric motor 50.

Next, the operation of the diameter reducing / expanding device of this embodiment will be described.

The can C is supplied from the shooter 77 to the diameter reducing device 1, where the drawing process is performed. Then, the drawn can C is supplied to the diameter expanding device 3 through the shooter 30, the flange processing is performed by the diameter expanding device, and the can C is discharged from the flanged can C shooter 79.

When the electric motor 50 is rotated, the rotational displacement is transmitted to the first shaft 15 via the timing belt 52, the pulley 51, the timing belt 54 and the pulley 53, and the shaft 15 rotates. Then, since the first cam 18 and the second cam 19 are fixed to the shaft 15, these cams 18, 19 rotate, and the cam followers 16, 17 are advanced with this rotation. The outer die 10 and the inner die 11 connected to the cam followers 16 and 17 are advanced with a phase difference from each other. The outer die 10 and the inner die 11 are fitted into the open ends of the cans C held by the pads 6, and the open ends are reduced in diameter.

The electric motor 50 is connected to the cylindrical member 20 of the conveying means 8 via the timing belt 52, the pulley 51, the shaft member 56, the gear box 58, the shaft member 59, and the index gear 64. Motor 5
0 rotates intermittently during one rotation, and the can C held by the plate member 21 is intermittently conveyed to the adjacent pad 6 while the reduced diameter die 7 is retracted.

As described above, in the diameter reducing device 1 of this embodiment,
A plurality of reduced-diameter dies 7 are arranged along the transport direction of the can C, and the plurality of reduced-diameter dies 7 are simultaneously advanced to perform a plurality of stages of drawing at the same time in one stroke.

When the electric motor 50 is rotated, this rotational displacement is transmitted to the second shaft 31 via the timing belt 52, pulley 51, timing belt 54, pulley 53, pulley 69, timing belt 70 and pulley 71. , The shaft 31 is rotated. Since the die holder 34 is fixed to the shaft 31, the die holder 34 is rotated. Since the cam follower 43 is slidably engaged with the third cam 36 connected to the base 4, the cam follower 43 moves forward in conjunction with the rotation of the die holder 34, and expands, which is connected to the cam follower 43. The diameter die 35 moves forward, fits into the open end of the can C held by the pad 33, and the open end is enlarged. At this time, the molding die 38 of the diameter-enlargement die is rotated by the electric motor 73, and the diameter is smoothly increased by this rotation.

Since the phase difference between the outer die 10 and the inner die 11 is provided in the reduced diameter die 7, the interference between the inner die 11 and the can C during the drawing process can be avoided. The deformation of the open end of C can be prevented.

In the diameter reducing device 1, the load cell 2
4 and 25 are provided to detect the pressing force acting in the axial direction of the can C.
Based on the pressing force of the can 25, processing information such as the suitability of the drawing of the can C can be obtained.

Similarly, in the diameter expanding device 3 as well, a load cell 45 is provided to detect the pressing force acting in the axial direction of the can C. Processing information such as whether or not the flange processing is appropriate.

In the diameter reducing device 1 and the diameter expanding device 3, the inside of the can C is filled with the compressed air during the drawing and the flange processing. 33, and the pressure of the compressed air causes the can C
Is prevented from being deformed. Further, since the pressure of the compressed air acts on the diameter reducing die 7 or the diameter expanding die 35, the diameter of the diameter reducing die 7 or the diameter expanding die 35 is reduced after the diameter reduction or diameter expansion.
Can be easily separated.

In the above embodiment, four diameter reducing dies 7 are provided, and four stages of diameter reduction are performed during the transportation of the can C.
This corresponds to the current mainstream being four-stage necking, but it is expected that the diameter of the lid will be reduced in order to reduce the weight of the lid attached to the can C. In this case, It is necessary to reduce the diameter more than four steps. In such a case, the diameter is reduced once in four steps by the diameter reducing device 1 of the diameter reducing and expanding device of the present embodiment, and discharged from the transport path 2 before being supplied to the diameter expanding device 3. Diameter reduction die 7 of device 1
Is replaced with a different one, and then the can C having been subjected to the four-stage diameter reduction is passed through the diameter-reducing apparatus 1 again, whereby four or more stages of diameter reduction can be performed.

[0050]

As described above, in the diameter reducing and expanding apparatus for a can according to the present invention, the diameter reducing apparatus for successively drawing the opening end of the can in multiple stages, and the can discharged from the diameter reducing apparatus. A diameter increasing device for performing flange processing on an open end of the can, and a diameter reducing device for a can including a conveying path provided between the diameter reducing device and the diameter expanding device, wherein the diameter reducing device is A plurality of first holding portions arranged on a base arranged side by side in one direction and holding a bottom of the can; and a plurality of first holding portions provided on the base so as to face the first holding portions. A plurality of diameter-reducing dies which advance toward the can and sequentially reduce the diameter of the opening end of the can in multiple stages; conveying means for intermittently transporting the can to an adjacent first holding unit; And a reduced-diameter die driving means for driving
The reduced diameter die includes an outer die fitted on the outer peripheral side of the open end of the can, and an inner die fitted on the inner peripheral side of the open end of the can. Comprises a rotatable first cam slidably engaged with the inner die, and a rotatable second cam slidably engaged with the inner die. A plurality of second holding portions rotatably disposed with respect to the bottom portion of the can, a die holder rotating integrally with the second holding portions, and a die holder opposed to the second holding portion. And a plurality of expanding dies for advancing toward the second holding portion and expanding the opening end of the can, and linking the expanding dies with rotation of the die holder and the second holding portion. And a third cam that moves forward and backward with respect to the die holder, the first holding unit, the diameter reducing die, and the second holding unit. Since the pressure detecting means for detecting the pressing force acting on these axially upon diameter and diameter are provided,

The apparatus for reducing and expanding the diameter of a can can be made less expensive and simpler in structure than that provided on a can production line.

[Brief description of the drawings]

FIG. 1 is a side view showing an apparatus for reducing and expanding the diameter of a can according to one embodiment of the present invention.

FIG. 2 is a front view showing an apparatus for reducing the diameter of a can according to one embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a diameter reducing device in a device for reducing the diameter of a can according to an embodiment of the present invention.

FIG. 4 is a sectional view showing a diameter expanding device in the diameter reducing device for a can according to one embodiment of the present invention.

FIG. 5 is a front view showing a drive system in the can diameter reducing and expanding apparatus for a can according to one embodiment of the present invention.

[Explanation of symbols]

 C Can 1 Diameter reducing device 2 Conveying path 3 Diameter expanding device 4 Base 6 Pad (first holding part) 7 Diameter reducing die 8 Conveying means 9 Diameter reducing die driving means 10 Outer die 11 Inner die 18 First cam 19 Second cam 33 Pad (second holding portion) 34 Die holder 35 Large diameter die 36 Third cam 24, 25, 45 Load cell (pressure detecting means)

Claims (1)

(57) [Claims] 1. A diameter reducing device for successively drawing the opening end of a can in multiple stages, a diameter expanding device for performing flange processing on an opening end of the can discharged from the diameter reducing device, and the diameter reducing device. And a conveying path provided between the diameter reducing device and a diameter reducing device for a can, comprising: a plurality of diameter reducing devices arranged on a base arranged side by side in one direction and holding a bottom of the can. A first holding part and a first holding part;
A plurality of reduced-diameter dies provided on the base opposed to the holding portion to advance toward the first holding portion and sequentially reducing the opening end of the can in multiple stages; A transport unit for intermittently transporting the die to the holding unit; and a reduced-diameter die driving unit for simultaneously driving the reduced-diameter dies forward and backward. And an inner die fitted on the inner peripheral side of the open end of the can. The reduced-diameter die driving means includes a rotatable first cam with which the outer die is slidably engaged, A second cam rotatably engaged with the inner die so that the inner die is slidably engaged with the inner die. Holding part, a die holder that rotates integrally with the second holding part,
A plurality of enlarged dies that are attached to the die holder so as to face the holding portion and advance toward the second holding portion to increase the diameter of the open end of the can; A third cam that moves forward and backward with respect to the die holder in conjunction with the rotation of the second holding portion; and the first holding portion, the reduced diameter die, and the second holding portion have a reduced diameter and an enlarged diameter. A diameter reducing and expanding apparatus for a can, comprising pressure detecting means for detecting a pressing force acting in the axial direction at the time of diameter.