JP2022020316A - Frame for drive mechanism, and can molding equipment - Google Patents

Abstract

To provide a frame for a drive mechanism, which can increase mounting accuracy of a reciprocating linear motion mechanism and which can facilitate maintenance of the reciprocating linear motion mechanism, and can molding equipment comprising the same.SOLUTION: A drive mechanism has a reciprocating linear motion mechanism for reciprocating a ram shaft. The reciprocating linear motion mechanism is housed in a cylindrical casing. In a frame for the drive mechanism, one side plate and the other side plate, a front plate and a back plate are integrally fixed. The back plate of the frame for the drive mechanism is provided with a circular opening for housing the reciprocating linear motion mechanism around a peripheral surface of the casing.SELECTED DRAWING: Figure 4

Description

The present invention relates to a frame for a drive mechanism to which a drive mechanism for reciprocating a ram shaft and a cup holder is attached when a cup-shaped body is DI-processed at the time of manufacturing a DI can, and a can forming apparatus provided with the drive mechanism frame. ..

As a can body filled and sealed with contents such as beverages, a bottomed cylindrical DI can having a can body (wall) and a can bottom (bottom), and a disk wound around the open end of the DI can. Two-piece cans with a shaped can lid and are known. Further, a bottle can in which a cap is screwed to the open end of a DI can (a so-called bottle necking process such as so-called bottle necking after DI processing) is also well known.

The DI can used for such a can body has a bottomed tubular shape by subjecting a disk-shaped blank punched from a plate material of an aluminum alloy material to a coupling process (squeezing process) and a DI process (squeezing ironing process). Is formed in.

In the cupping step, the blank is cupped (drawing) to form a cup-shaped body which is a molding intermediate in the process of transferring from the blank to the DI can. Further, in the DI step, a punch sleeve is fitted inside the cup-shaped body, and a plurality of dies are fitted outside, and the cup-shaped body is squeezed and ironed between them. That is, the cup-shaped body is subjected to DI (Drawing & Ironing) processing to obtain a DI can.

In performing DI processing on the cup-shaped body, for example, a can molding apparatus as described in Patent Document 1 is used. This can forming apparatus has a reciprocating linear motion mechanism for linearly reciprocating the ram shaft that supports the punch sleeve.
Conventionally, such a reciprocating linear motion mechanism has been provided between a lower frame split body that supports the lower half of the housing of the reciprocating linear motion mechanism and an upper frame split body provided along the upper half of the housing of the reciprocating linear motion mechanism. It was supported by a split-type drive mechanism frame that sandwiches a reciprocating linear motion mechanism.

Japanese Unexamined Patent Publication No. 2018-054065

However, the conventional split type drive mechanism frame has a structure in which two frame split bodies are fastened so as to sandwich the reciprocating linear motion mechanism to fix the reciprocating linear motion mechanism, so that the mounting accuracy of the reciprocating linear motion mechanism is low. There was a problem that it was easy to become, and the blurring of the ram axis was likely to be large.

Further, at the time of maintenance of the reciprocating linear motion mechanism, it is necessary to go through a time-consuming process such as removing the upper frame split body to expose the reciprocating linear motion mechanism and then suspending and taking out the reciprocating linear motion mechanism. There was a problem that it was low.

The present invention has been made in consideration of such circumstances, and is for a drive mechanism capable of improving the mounting accuracy of the reciprocating linear motion mechanism and facilitating the maintenance of the reciprocating linear motion mechanism. It is an object of the present invention to provide a frame and a can forming apparatus equipped with the frame.

In the drive mechanism frame of the present invention, a ram shaft provided with a punch at the front end portion and a through hole through which the punch is inserted are formed, and the cup-shaped body extruded by the punch is passed through the cup. The drive is provided in a can forming apparatus having a die for drawing and ironing a shape, a cup holder for pressing the cup against the end face of the die, and a drive mechanism for reciprocating the ram shaft. A frame for a drive mechanism that houses the mechanism, wherein the drive mechanism has a reciprocating linear motion mechanism that reciprocates the ram shaft, and the reciprocating linear motion mechanism is housed in a cylindrical housing, and the drive mechanism is accommodated. One and the other side plate, bottom plate, front plate, and back plate are integrally fixed to the frame, and the back plate surrounds the peripheral surface of the housing and accommodates the reciprocating linear motion mechanism. It is characterized in that the circular openings to be formed are integrally formed.

According to the frame for the drive mechanism of the present invention, the frame for the drive mechanism for attaching the reciprocating linear motion mechanism is integrated, and the reciprocating linear motion mechanism is accommodated and fixed in the accommodating circular opening. It is possible to improve the mounting accuracy of the reciprocating linear motion mechanism as compared with the frame for a drive mechanism composed of the divided bodies divided into a plurality of such parts. This makes it possible to suppress vibration during operation of the reciprocating linear motion mechanism and blurring of the reciprocating motion of the ram shaft, and to perform squeezing and ironing processing on the cup-shaped body with high accuracy.

Further, in the present invention, the drive mechanism has a cup holder drive mechanism for reciprocating the cup holder, and the cup holder drive mechanism may be supported between the front plate and the back plate.

Further, in the present invention, the housing may be rotatably formed with a gear that transmits the rotational force of the reciprocating linear motion mechanism to the cup holder drive mechanism.

Further, in the present invention, the back plate may extend upward from the front plate.

Further, in the present invention, the front plate may be partially detachably formed.

Further, in the present invention, an extension portion on which the die is arranged may be integrally fixed to the outside of the one side plate.

The can molding apparatus of the present invention is a drive mechanism of the can molding apparatus provided with the drive mechanism frame according to each of the above items, and is the drive mechanism frame, the reciprocating linear motion mechanism, and the cup holder drive mechanism. It is characterized by having at least.

According to the present invention, there is provided a drive mechanism frame capable of improving the mounting accuracy of the reciprocating linear motion mechanism and facilitating maintenance of the reciprocating linear motion mechanism, and a can forming apparatus provided with the frame. be able to.

FIG. 1 is a schematic configuration diagram showing an example of a can molding apparatus. FIG. 2 is a perspective view showing an example of a reciprocating linear motion mechanism. FIG. 3 is a perspective view showing an example of the cup holder drive mechanism. FIG. 4 is a perspective view showing a frame for a drive mechanism according to an embodiment of the present invention. FIG. 5 is a perspective view showing a drive mechanism frame in a state where the reciprocating linear motion mechanism and the cup holder drive mechanism (cam mechanism) are fixed.

Hereinafter, a drive mechanism frame and a drive mechanism of a can molding apparatus provided with the drive mechanism frame according to the embodiment to which the present invention is applied will be described with reference to the drawings. It should be noted that the embodiments shown below are specifically described in order to better understand the gist of the invention, and are not limited to the present invention unless otherwise specified. In addition, the drawings used in the following description may be shown by enlarging the main parts for convenience in order to make the features of the present invention easy to understand, and the dimensional ratios of each component are the same as the actual ones. It is not always the case.

First, a DI can made from the cup-shaped body W will be described.
DI cans are used for cans (two-piece cans and bottle cans) that are filled and sealed with the contents of beverages and the like. In the case of a two-piece can, the can body includes a bottomed cylindrical DI can and a disk-shaped can lid wrapped around the open end of the DI can. In the case of a bottle can, the can body includes a DI can (which has been subjected to so-called bottle necking after DI processing) and a cap screwed to the open end of the DI can. .. The "DI" of the DI can is an abbreviation for Drawing & Ironing.

The DI can is formed into a bottomed tubular shape by subjecting a disk-shaped blank punched from a plate material of an aluminum alloy material to a cupping step (squeezing step) and a DI step (squeezing ironing step). Specifically, in the case of a two-piece can, for example, the DI can is manufactured through a plate material punching process, a cupping process, a DI process, a trimming process, a printing process, a painting process, a necking process, a bottom reform process, and a franging process in this order. To.

Next, the can molding apparatus will be described.
FIG. 1 is a schematic configuration diagram showing an example of a can molding apparatus.
The can forming apparatus 100 is used in the above-mentioned DI step, and the cup-shaped body W is subjected to DI processing (drawing (re-squeezing) ironing processing) to form a DI can.

In FIG. 1, the can forming apparatus 100 is used in the DI step described above, and the cup-shaped body W is subjected to DI processing (drawing (re-drawing) ironing processing) to form a DI can U. The can forming apparatus 100 has a ram shaft 103 provided with a punch sleeve 102 at the front end portion and a reciprocating linear motion mechanism (ram shaft drive mechanism) 11 for reciprocating the ram shaft 103 along the axis O direction of the ram shaft 103. A bearing 105 (105F, 105R) that reciprocally supports the ram shaft 103 in the axis O direction, a die 108 (108A, 108B) having a through hole 107 through which the punch sleeve 102 is inserted, and a die 108. With a cup holding mechanism 101 including a cup holder 106 inserted into the cup-shaped body W arranged on the end surface 108a facing rearward in the axis O direction and pressing the bottom wall of the cup-shaped body W toward the end surface 108a. The cup holder 106 is provided with an urging means 115, which is located behind the bearing 105 (front bearing 105F) in the O-axis direction and can urge the cup holder 106 by air pressure.

Further, the can forming apparatus 100 includes a cup feeder (not shown) that conveys the cup-shaped body W on the end face 108a of the die 108, and a receiving seat (not shown) that holds the cup-shaped body W on the end face 108a. A bottom former (can bottom molding mold) 110 that faces the punch sleeve 102 from the axis O direction and is arranged at the forward end position of the punch sleeve 102 along the axis O direction to form the can bottom together with the punch sleeve 102. The DI can U is separated from the punch sleeve 102 by discharging air from the can carry-out mechanism (not shown) for transporting the subsequent DI can U to the outside of the can molding device 100 and the air discharge hole opened at the front end of the punch sleeve 102. A cup holder drive that mechanically connects to the blow-off (air discharge mechanism) 112 to be molded and is driven synchronously with the reciprocating linear motion mechanism 11 to reciprocate the cup holder 106 of the cup holding mechanism 101 in the axis O direction. It includes a mechanism (cam mechanism) 12 and a drive source (not shown) such as a drive motor connected to the reciprocating linear motion mechanism 11.

Then, in the can forming apparatus 100, a frame base portion 10A to which the reciprocating linear motion mechanism 11 and the cup holder drive mechanism (cam mechanism) 12 are fixed, a die 108 and a bottom former (can bottom forming die) 110 are placed. The extension portion 10B and the drive mechanism frame 10 including the extension portion 10B are formed.

In the following description, the central axes of the ram shaft 103, the punch sleeve 102, the bearing 105, the die 108, the cup holder 106, and the bottom former 110 are arranged coaxially with each other and extend in the horizontal direction. It is referred to as axis O.

Next, the reciprocating linear motion mechanism (ram axis drive mechanism) 11 will be described.
FIG. 2 is a perspective view showing an example of a reciprocating linear motion mechanism.
The reciprocating linear motion mechanism 11 includes a housing 21 having an internal gear 23, a first rotating body (rotating shaft) 22, and a second rotating body 24 having an external gear 25 that meshes with the internal gear 23. , A ram shaft connecting portion (acting portion) 27, and the like.

The housing 21, its internal gear 23, and the first rotating body (rotating shaft) 22 are centered on the first central axis C1, that is, are arranged coaxially with each other with the first central axis C1 as a common axis. The second rotating body 24 and its external gear 25 are centered on the second central axis C2, that is, are arranged coaxially with each other with the second central axis C2 as a common axis.
The first central axis C1 and the second central axis C2 are arranged parallel to each other and separated from each other. In the present embodiment, the first central axis C1 and the second central axis C2 extend in the horizontal direction.

The housing 21 has a cylindrical outer shape. The cylindrical shape referred to here includes not only a cylinder having a perfect circular cross section but also a cylinder having a flat part or having protrusions or ridges formed on the outer peripheral surface.

The first rotating body (rotating shaft) 22 of the reciprocating linear motion mechanism 11 is connected to the rotating shaft of a motor (not shown) which is a drive source of the reciprocating linear motion mechanism 11.
In such a reciprocating linear motion mechanism 11, when a rotational driving force is transmitted from a motor (not shown) to the first rotating body (rotating shaft) 22, the first rotating body (rotating shaft) 22 is rotated around the first central axis C1. It can be rotated. Then, the second rotating body 24 supported by the first rotating body 22 is also rotated around the first central axis C1.

At this time, since the external gear 25 of the second rotating body 24 and the internal gear 23 of the housing 21 mesh with each other, the second rotating body 24 is rotated (revolved) around the first central axis C1. While being rotated, it is also rotated (rotated) around the second central axis C2. Then, the ram shaft connecting portion (acting portion) 27 connected to the second rotating body 24 reciprocates linearly along the horizontal axis S1 direction.

That is, the reciprocating linear motion mechanism 11 converts the rotational driving force input to the first rotating body (rotating shaft) 22 into a reciprocating linear driving force (reciprocating linear motion), and converts the ram shaft connecting portion (acting portion) 27 into a reciprocating linear motion. Output to the outside via. Therefore, by connecting the punch sleeve 102 (see FIG. 1) to the ram shaft connecting portion (acting portion) 27 via the ram shaft 103, the punch sleeve 102 is connected to the punch sleeve 102 in a predetermined direction (axis O parallel to the horizontal axis S). It can be reciprocated linearly along the direction), and the cup-shaped body W can be subjected to DI processing using the punch sleeve 102 and the die 108 to form the DI can U.

FIG. 3 is a perspective view showing an example of the cup holder drive mechanism.
The cup holder drive mechanism (cam mechanism) 12 has a rotational force via a plurality of gears 38, 39 that transmit the rotational force of the interlocking gear 29 fixed to the first rotating body (rotating shaft) 22 of the reciprocating linear motion mechanism 11. The axis of action to which the rotating shaft 32 is transmitted, the cam 33 and the rotating body 34 fixed around the rotating shaft 32, and the cam 35 and the rotating body 36 interlocked with the cam 33 and the rotating body 34 are fixed. It has 37 and. The plurality of gears 38, 39 are rotatably provided inside the frame base portion 10A, which will be described later.

The action axis 37 performs a reciprocating linear motion along a predetermined direction (horizontal axis S2 direction in the example of the present embodiment) by rotating the rotation axis 32. Two operating shafts 106a and 106a extending from the cup holder 106 are connected to the rotating shaft 32 via a support member 31.
With the above configuration, when the rotational driving force is transmitted from the motor (not shown) to the first rotating body (rotating shaft) 22 of the reciprocating linear motion mechanism 11, a plurality of gears (not shown) are transferred from the reciprocating linear motion mechanism 11. A rotational force is transmitted to the rotary shaft 32 via the cup holder drive mechanism 12, and the cup holder 106 of the cup holding mechanism 101 (see FIG. 1) is connected to the ram shaft connecting portion (acting portion) 27 of the reciprocating linear motion mechanism 11. In conjunction with the reciprocating movement of, the reciprocating movement is performed in the axis O direction.

In addition to the configuration in which the cup holder 106 is reciprocated by a mechanical configuration such as a cam or a rotating body as in the present embodiment, the cup holder drive mechanism reciprocates the cup holder by, for example, a motor or air pressure. It may be configured to make it.

FIG. 4 is a perspective view showing a frame for a drive mechanism according to an embodiment of the present invention. Further, FIG. 5 is a perspective view showing a drive mechanism frame in a state where the reciprocating linear motion mechanism and the cup holder drive mechanism (cam mechanism) are fixed.

The drive mechanism frame 10 of the present embodiment is composed of a frame base portion 10A and an extension portion 10B. The frame base portion 10A and the extension portion 10B may be integrally formed of the same members, or may be formed by fixing and integrating separate members.

The frame base 10A forms a box-shaped body entirely made of metal, and has a front plate 41, a bottom plate 42, one side plate 43A, the other side plate 43B, and a back plate 44, and has a front plate 41. Some are removable. That is, an open portion 41A is formed in a part of the front plate 41, and a lid plate 41B covering the open portion 41A is provided.

The front plate 41, the bottom plate 42, one side plate 43A, the other side plate 43B, and the back plate 44 are integrally formed by, for example, casting. In addition to the integral molding by casting, these plates constituting the frame base 10A may be fixed to each other by screws, welding, or the like, and the whole may be integrally formed.

The upper portion of the back plate 44 is formed so as to extend upward from the front plate 41. That is, the back plate 44 is formed so that the upper portion protrudes in a substantially semicircular shape. The back plate 44 is formed with a circular opening 46 for attaching the reciprocating linear motion mechanism 11. The circular opening 46 is an opening extending along the thickness direction of the back plate 44.

The opening diameter of the circular opening 46 is formed to be larger than the outer diameter of the cylindrical housing 21 constituting the reciprocating linear motion mechanism 11.

As shown in FIG. 5, a reciprocating linear motion mechanism 11 is attached to such a circular opening 46. The reciprocating linear motion mechanism 11 is fitted into the circular opening 46 so that the outer peripheral surface of the cylindrical housing 21 is in contact with the inner peripheral surface of the circular opening 46. Then, the rib 21a formed on the outer peripheral surface of the housing 21 of the reciprocating linear motion mechanism 11 and the bolt hole 46c formed on the edge portion on the front surface side (opening portion 41A side) of the circular opening 46 are fastened by bolts. By doing so, the reciprocating linear motion mechanism 11 is firmly fixed to the frame base 10A via the back plate 44.

The first rotating body (rotating shaft) 22 of the reciprocating linear motion mechanism 11 fixed to the back plate 44 is connected to the rotating shaft of a motor (not shown) arranged outside the back plate 44.

A cup holder drive mechanism (cam mechanism) 12 is supported between the front plate 41 and the back plate 44 of the frame base 10A. More specifically, the front plate 41 is formed with support openings 41a and 41b, and the back plate 44 is also formed with support openings 44a and 44b. Of these, the support opening 41a and the support opening 44a, and the support opening 41b and the support opening 44b are formed on the same central axis so as to face each other.

The rotation shaft 32 of the cup holder drive mechanism (cam mechanism) 12 is supported by the support opening 41a and the support opening 44a. Further, the working shaft 37 of the cup holder drive mechanism (cam mechanism) 12 is supported by the support opening 41b and the support opening 44b. As a result, the cup holder drive mechanism (cam mechanism) 12 is supported between the front plate 41 and the back plate 44 of the frame base 10A.

In the present embodiment, the extension portion 10B of the drive mechanism frame 10 is formed so as to be in contact with the outer surface of one side plate 43A constituting the frame base portion 10A. Like the frame base 10A, the extension 10B may be made of a metal plate or the like, and the extension 10B and the frame base 10A are fastened together by, for example, bolts or the like. ..

For example, a cup holder 106, an urging means 115, a bottom former 110 (see FIG. 1), and the like are arranged on the upper portion of the extension portion 10B. These members may be fixed to the upper part of the extension portion 10B by, for example, bolts.

The extension portion 10B does not necessarily have to be integrally formed with the frame base portion 10A to which the reciprocating linear motion mechanism 11 is attached. That is, a frame may be formed adjacent to the frame base portion 10A to attach a die, a cup holder, or the like corresponding to the extension portion 10B as a member separate from the frame base portion 10A.

As described above, according to the drive mechanism frame 10 of the present embodiment, the drive mechanism frame 10 for attaching the reciprocating linear motion mechanism 11 is integrally molded, and a circular opening capable of accommodating the reciprocating linear motion mechanism 11 is accommodated. By accommodating and fixing the frame in the 46, the mounting accuracy of the reciprocating linear motion mechanism 11 can be improved as compared with the conventional frame for a drive mechanism composed of a plurality of divided bodies. As a result, vibration during operation of the reciprocating linear motion mechanism 11 and blurring of the reciprocating motion of the ram shaft 103 can be suppressed, and the cup-shaped body can be squeezed and ironed with high accuracy.

Although one embodiment of the present invention has been described above, this embodiment is presented as an example and is not intended to limit the scope of the invention. This embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. This embodiment and its modifications are included in the scope and gist of the invention as well as the invention described in the claims and the equivalent scope thereof.

The drive mechanism frame of the present invention can improve the mounting accuracy of the reciprocating linear motion mechanism to the frame, thereby suppressing the wobbling of the reciprocating motion of the ram shaft and squeezing and ironing the cup-shaped body with high accuracy. It is possible to do. Therefore, it has industrial applicability.

10 Drive mechanism frame 10A Frame base 10B Extension 11 Reciprocating linear motion mechanism (ram shaft drive mechanism)
12 Cup holder drive mechanism (cam mechanism)
21 Housing 41 Front plate 42 Bottom plate 43A One side plate 43B The other side plate 44 Back plate 46 Circular opening

Claims (7)

A ram shaft provided with a punch at the front end and a through hole through which the punch is inserted are formed, and the cup-shaped body extruded by the punch is passed through to draw and iron the cup-shaped body. A drive mechanism frame provided in a can forming apparatus having a die to be performed, a cup holder for pressing the cup-shaped body against the end face of the die, and a drive mechanism for reciprocating the ram shaft, and accommodating the drive mechanism. There,
The drive mechanism has a reciprocating linear motion mechanism that reciprocates the ram shaft.
The reciprocating linear motion mechanism is housed in a cylindrical housing.
One and the other side plate, the bottom plate, the front plate, and the back plate are integrally fixed to the drive mechanism frame, and the back plate has the reciprocating linear motion surrounding the peripheral surface of the housing. A frame for a drive mechanism, characterized in that a circular opening for accommodating the mechanism is integrally formed. The first aspect of the present invention is characterized in that the drive mechanism has a cup holder drive mechanism for reciprocating the cup holder, and the cup holder drive mechanism is supported between the front plate and the back plate. The frame for the drive mechanism described. The drive mechanism frame according to claim 2, wherein a gear for transmitting the rotational force of the reciprocating linear motion mechanism to the cup holder drive mechanism is rotatably formed in the housing. The drive mechanism frame according to any one of claims 1 to 3, wherein the back plate extends upward from the front plate. The drive mechanism frame according to any one of claims 1 to 4, wherein the front plate is partially detachably formed. The drive mechanism frame according to any one of claims 1 to 5, wherein an extension portion on which the die is arranged is integrally fixed to the outside of the one side plate. A can molding apparatus provided with the drive mechanism frame according to any one of claims 1 to 6.
A can molding apparatus having at least the drive mechanism frame and the reciprocating linear motion mechanism.

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