JP2018089691A - Bottle can manufacturing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bottle can manufacturing apparatus capable of performing bottom reforming on a can bottom without providing a bottom reforming device on a previous process or a post process of the bottle can manufacturing apparatus.SOLUTION: A bottle can manufacturing apparatus includes: a retention table 3 which is provided with a plurality of cylindrical chucks 7 capable of retaining a cylindrical can W with bottom and is intermittently rotated and moved around a table shaft; a working table which is provided with a plurality of working tools for performing working for a can body 51 of the can W, is arranged oppositely from a table shaft direction on the retention table 3 and is reciprocated in the table shaft direction; and a bottom reform mechanism 13 which is arranged oppositely from the side opposite to the working table along the table shaft direction on a can bottom 52 of the can W retained by the chucks 7.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a bottle can manufacturing apparatus for manufacturing a bottle can by processing a can (work).

  2. Description of the Related Art Conventionally, a bottle can manufacturing apparatus that manufactures a bottle can by processing a work can (intermediate molded body can) made of an aluminum alloy material or the like is known.

  The bottle can manufacturing apparatus includes an apparatus main body, a holding table supported by the apparatus main body and provided with a plurality of cylindrical chucks capable of holding a bottomed cylindrical can, and a shaft portion penetrating the holding table in the table axial direction. And a processing table provided with a plurality of processing tools disposed on the holding table so as to face the holding table in the axial direction of the table, and for processing the can body of the can. And a table index mechanism for intermittently rotating the holding table around the table axis with respect to the processing table.

A plurality of cans such as DI cans, which are workpieces, are held on the holding table along the table circumferential direction around the table axis. Specifically, the holding table is provided with a plurality of chucks that can hold cans arranged in the circumferential direction of the table, and the cans are held by the chuck with the opening end of the can body facing the processing table. The
In the processing table, a plurality of processing tools for processing the can body of the can (specifically, the opening end portion and the vicinity thereof in the can body) are arranged along the table circumferential direction. Specifically, a plurality of attachment holes penetrating in the table axis direction are formed in the processing table in the table circumferential direction, and the plurality of processing tools are attached to these attachment holes in the order of processing to the can.

The plurality of processing tools include a die processing tool and a rotational processing tool.
The die processing tool moves in the direction of its central axis (can axis) with respect to the can (direction parallel to the table axis) to reduce the diameter of the peripheral wall (can body) of the can and to expand the diameter of the peripheral wall. Die processing such as diameter processing is performed. The rotary processing tool moves around its central axis with respect to the can, and by rotating around the central axis, the peripheral wall of the can is rotated such as trimming, screw forming, curling, and throttle (curl crushing). Apply.

  The holding table and the processing table are repeatedly moved toward and away from each other in the table axis direction by the crank mechanism, and are relatively rotated relative to each other in the table circumferential direction by the table index mechanism. Specifically, the processing table moves toward and away from the holding table in the table axis direction, and the holding table moves around the table around the one stroke (reciprocating movement). Rotate in the direction by a predetermined amount.

Then, for each stroke in which the tables approach and separate from each other, the can (work) is processed, and the can is moved to the processing position by the next processing tool.
By repeating this operation, the can held by the holding table is sequentially processed by a plurality of processing tools provided on the processing table, and when a series of processing ends, the expected shape The bottle can of the product which has is manufactured.

  In addition, when the can held by the chuck of the holding table has finished all the processing, the piston portion provided on the holding table pushes the can toward the processing table in the table axial direction. Is discharged from the chuck.

By the way, in recent years, from the viewpoint of environmental protection such as CO ₂ emission reduction, there is an increasing demand for weight reduction of aluminum cans by reducing raw materials used. Specifically, aiming to reduce the weight of cans of 0.1 g or more (about 1% or more), it is necessary to develop lightweight cans that do not impair pressure strength reduction and productivity and are strong against distribution pinholes. . Even with a reduction of 0.1 g per can, if it can be applied to 18 billion cans per year in the aluminum can market, a significant reduction in environmental impact can be achieved.

In order to reduce the weight of the can, the original plate thickness of the plate material (plate material of the can before molding, hereinafter sometimes referred to as a blank) must be reduced, but if a thin blank is used, the original plate thickness is reduced. The pressure resistance of the maintained can bottom is lowered.
When the pressure-resistant strength is lowered, the annular convex portion protruding from the open end along the can axis direction toward the can bottom side is deformed by the action (increase) of the internal pressure of the can filled with the contents. So-called bottom growth occurs.

  If bottom growth occurs, the height of the can (total length in the can axis direction) is not stable, which may cause problems in production and shipment. Further, when the internal pressure of the can exceeds the pressure resistance strength, so-called buckling occurs in which the dome portion that is recessed from the can bottom along the can axis direction toward the opening end portion of the can bottom is reversed.

  As a technique for suppressing such bottom growth and buckling, for example, in Patent Documents 1 to 5 below, a concave portion is formed on the inner peripheral wall (inner wall) or outer peripheral wall (outer wall) of the annular convex portion of the can bottom. It describes a bottom reforming process that increases the strength of the can bottom.

US Pat. No. 6,616,393 JP 2016-47541 A JP 2016-47542 A Japanese Patent Laid-Open No. 11-244972 JP 2000-197937 A

  Bottle cans also have room for improvement in terms of weight reduction, and there is a demand for bottom reform processing on the bottom of cans. However, conventionally, when the bottom reforming process is performed on the bottom of the bottle can, it is necessary to install the bottom reforming apparatus in a pre-process or a post-process of the bottle can manufacturing apparatus, which increases equipment costs and installation space.

  The present invention has been made in view of such circumstances, and it is possible to perform bottom reforming processing on the bottom of a can without installing a bottom reforming device in a pre-process or a post-process of a bottle can manufacturing apparatus. The object is to provide a bottle can manufacturing apparatus.

  A bottle can manufacturing apparatus according to an aspect of the present invention includes a holding table provided with a plurality of cylindrical chucks capable of holding a bottomed cylindrical can, a rotary table that intermittently rotates around a table axis, and a can body of the can A plurality of processing tools for performing processing on the processing table, the processing table disposed opposite to the holding table in the direction of the table axis and reciprocating in the direction of the table axis, and the table shaft on the bottom of the can held by the chuck And a bottom reforming mechanism disposed opposite to the processing table along the direction.

  The bottle can manufacturing apparatus of the present invention includes a bottom reforming mechanism. The bottom reforming mechanism performs a bottom reforming process on the bottom of the can held by the holding table. That is, according to the present invention, it is possible to perform the bottom reforming process on the bottom of the can in the bottle can manufacturing apparatus without installing the bottom reforming apparatus in the pre-process and the post-process of the bottle can manufacturing apparatus. In this way, bottle cans manufactured with bottom reforming process can be made lighter by reducing the thickness of the bottom of the can (that is, the blank thickness of the blank) because the strength of the bottom of the can is increased and the pressure resistance is improved. While achieving this, bottom growth and buckling can be reliably prevented. Therefore, an increase in equipment cost and installation space can be suppressed while reducing the weight of the bottle can.

  Further, in the bottle can manufacturing apparatus, the bottom reforming mechanism includes a pressing portion that can contact the can bottom of the can held by the chuck, and a first movement that moves the pressing portion in the central axis direction of the chuck. And a second moving means for moving the pressing portion in the chuck radial direction orthogonal to the central axis of the chuck.

  In this case, the bottom reforming mechanism has a pressing portion that can come into contact with the bottom of the can held by the chuck of the holding table, and the pressing portion is moved in the direction of the center axis of the chuck (by the chuck) by the first moving means. It moves in the direction of the can axis of the can to be held, and moves in the chuck radial direction (in the direction of the can diameter of the can held by the chuck) by the second moving means. Thereby, the bottom reforming mechanism can perform the bottom reforming process on the can bottom of the can.

  Specifically, when the holding table is intermittently rotated about the table axis with respect to the processing table and the chuck of the holding table is disposed at a position corresponding to the bottom reforming mechanism, One moving means moves the pressing portion closer to the center axis of the chuck with respect to the bottom of the can held by the chuck. As a result, the pressing portion is disposed opposite to the inner peripheral wall or outer peripheral wall of the annular convex portion protruding from the opening end portion along the can axis direction to the can bottom side of the can bottom from the chuck radial direction. Is done.

Next, the second moving means of the bottom reforming mechanism moves the pressing portion in the chuck radial direction. Thereby, a press part presses the inner peripheral wall or outer peripheral wall of a cyclic | annular convex part among the can bottoms of a can, forms a recessed part in this can bottom, and performs a bottom reform process.
In this way, bottle cans manufactured with bottom reforming process can be made lighter by reducing the thickness of the bottom of the can (that is, the blank thickness of the blank) because the strength of the bottom of the can is increased and the pressure resistance is improved. While achieving this, bottom growth and buckling can be reliably prevented.

  In the bottle can manufacturing apparatus, it is preferable that the bottom reforming mechanism includes a third moving unit that moves the pressing portion in a chuck circumferential direction around a central axis of the chuck.

  In this case, from the state where the pressing portion presses the bottom of the can as described above, the third moving means can rotate the pressing portion in the chuck circumferential direction (can peripheral direction of the can held by the chuck). it can. As a result, the recess formed in the can bottom of the can by the pressing portion extends in the chuck circumferential direction, and the effect of stably increasing the strength of the can bottom along the can circumferential direction and maintaining the appearance of the can bottom satisfactorily. The effect that it can be obtained.

  Further, in the bottle can manufacturing apparatus, the pressing portion includes an inner peripheral wall of an annular convex portion that protrudes toward the bottom of the can from the open end along the can axis direction among the bottom of the can held by the chuck. It is preferable that it can contact | abut.

  In this case, the pressing part of the bottom reforming mechanism performs a bottom reforming process on the inner peripheral wall of the annular convex part in the bottom of the can held by the chuck. That is, the pressing part moves from the inner side (center side) in the chuck radial direction to the outer side with respect to the inner peripheral wall of the annular convex part of the can bottom, so that a concave part is formed. It is possible to stably support the chuck with a simple structure, and as a result, it becomes easy to accurately perform the bottom reforming process on the bottom of the can. In this case, the appearance of the bottom of the can can be easily maintained.

  In the bottle can manufacturing apparatus, the pressing portion is preferably a forming roller.

  In this case, since the pressing portion is a forming roller, the pressing portion that presses the can bottom of the can can be rolled on the can bottom. Thereby, the frictional resistance at the time of forming the concave portion on the can bottom by the pressing portion can be reduced to prevent the surface of the can bottom from being scratched, and a wide formation region of the concave portion with respect to the can bottom can be easily secured. Accordingly, the strength of the can bottom can be more reliably and stably increased.

  Moreover, the said bottle can manufacturing apparatus WHEREIN: It is preferable that the said press part is a punch nail | claw.

  In this case, since the pressing portion is a punch claw, the structure for moving the pressing portion in the central axis direction and the chuck radial direction of the chuck can be simplified, and the concave portion is rapidly formed in the can bottom by a simple operation. be able to. Therefore, the processing speed of the bottom reforming process to the can bottom is increased.

  In the bottle can manufacturing apparatus, it is preferable that a through hole through which the bottom reforming mechanism is inserted is formed in a portion of the holding table corresponding to the chuck.

  In this case, the bottom reforming mechanism can be easily accessed with respect to the bottom of the can held by the chuck by a simple structure in which a through hole is formed in a portion corresponding to the chuck in the holding table.

  In the bottle can manufacturing apparatus, the bottom reforming mechanism is preferably arranged at a position corresponding to the chuck facing the die processing tool among the plurality of processing tools provided on the processing table. .

  In this case, when bottom reforming is performed on the bottom of the can by the bottom reforming mechanism, die processing is performed on the can body of the can by a die processing tool facing the chuck holding the can from the processing table side. Is done. As a result, the can is held between the die processing tool and the chuck, and the attitude of the can held by the chuck is stabilized (in particular, the movement of the can in the central axis (can axis) direction of the chuck is restricted). ), Lifting of the can from the chuck due to bottom reforming is reliably prevented. Accordingly, the accuracy of the bottom reforming process is stably increased.

  In addition, in this case, there is no need to prepare a pressing member for pressing the opening end of the can body, which has been conventionally required when performing the bottom reforming process, and the structure of the apparatus is simplified. In addition, since the bottom reforming process and the die processing are performed at the same time, the processing time does not increase as compared with the conventional technique while performing the bottom reforming process on the can.

  Further, the bottle can manufacturing apparatus includes a can discharge mechanism that is disposed opposite to the processing table along the table axial direction on the bottom of the can held by the chuck, the can discharge mechanism, It is preferable that an extruding portion capable of contacting the bottom of the can held by the chuck and a discharging unit that moves the extruding portion in the central axis direction of the chuck.

In the present invention, as described above, in order to easily access the bottom reforming mechanism to the bottom of the can held by the chuck, it is preferable that a through hole is formed in a portion corresponding to the chuck in the holding table. . For this reason, it is difficult to apply the piston part provided in the part corresponding to each chuck | zipper of a holding table in the conventional bottle can manufacturing apparatus to the bottle can manufacturing apparatus of this invention.
In view of this, in the above configuration, a can discharge mechanism for separating the can held by the chuck from the chuck is provided. The can discharge mechanism is provided, for example, in the apparatus main body other than the holding table.

  This can discharge mechanism is disposed opposite to the can bottom of the can held by the chuck from the side opposite to the processing table along the table axial direction (that is, from the apparatus main body side). The can discharge mechanism has an extruding portion that can come into contact with the bottom of the can held by the chuck, and the discharging means places the extruding portion in the central axis direction of the chuck (in the can axial direction of the can held by the chuck). The pushing portion pushes out the can, and the can is detached (discharged) from the chuck to the processing table side along the table axial direction.

  Further, in the bottle can manufacturing apparatus, the discharging means includes a first elevating unit that moves the extruding unit in a central axis direction of the chuck, and the extruding unit is moved at a slower speed than the first elevating unit. It is preferable to include a second elevating part that moves in the central axis direction.

  In this case, the discharging means has a first elevating part and a second elevating part that move the pushing part in the direction of the central axis of the chuck at different speeds. Specifically, the speed at which the second elevating part moves the pushing part in the direction of the central axis of the chuck is made slower than the speed at which the first elevating part moves the pushing part in the direction of the central axis of the chuck.

Therefore, when the can is discharged from the chuck, first, the first elevating part that moves the pushing part is fast moved quickly until the pushing part comes close to or comes into contact with the can bottom of the can. Next, the second elevating part, which moves the extruding part at a slow speed, pushes the extruding part against the can bottom of the can and pushes out the can to release the can from the chuck.
Thereby, the discharge operation of the can from the chuck by the discharge means is performed quickly, and the extruding part is prevented from colliding with the can bottom at a high speed and damaging the can bottom.

  According to the bottle can manufacturing apparatus of the present invention, it is possible to perform the bottom reforming process on the bottom of the can without installing the bottom reforming apparatus in a pre-process or a post-process of the bottle can manufacturing apparatus.

It is a flowchart which shows an example of the manufacturing process of a bottle can. It is a schematic diagram explaining the change of the shape of the can in the manufacturing process of a bottle can. It is a side view showing a schematic structure of a bottle can manufacturing device concerning one embodiment of the present invention. It is a front view which shows the IV-IV cross section of the bottle can manufacturing apparatus of FIG. It is a side view which shows the bottom reform mechanism of a bottle can manufacturing apparatus. It is a top view which shows the 1st moving means vicinity of a bottom reform mechanism. It is a front view which shows the 1st moving means vicinity of a bottom reform mechanism. It is a figure explaining operation | movement of a bottom reform mechanism. It is an enlarged view which shows the chuck | zipper, can bottom, and press part vicinity of FIG. It is a figure explaining operation | movement of a bottom reform mechanism. It is an enlarged view which shows the chuck | zipper, can bottom, and press part vicinity of FIG. It is a timing chart explaining operation | movement of a bottom reform mechanism. It is a side view which shows the can discharge | emission mechanism of a bottle can manufacturing apparatus. It is a top view which shows a can discharge | emission mechanism. It is a timing chart explaining operation | movement of a can discharge | emission mechanism.

  Hereinafter, the bottle can manufacturing apparatus 1 which concerns on one Embodiment of this invention is demonstrated with reference to drawings. In addition, in order to make the features of the present invention easier to understand, the drawings used for the description of the present embodiment may show the main part in an enlarged or extracted manner, and the dimensional ratio of each component Etc. are not always the same as the actual ones.

First, an example of the manufacturing process of the bottle can B will be described.
As shown in FIG. 1 and FIG. 2, the bottle can B has a plate material punching process S01, a cupping process (drawing process) S02, a DI process (drawing and ironing process) S03, a trimming process S04, and a printing / painting (can outer surface) process. S05, painting (can inner surface) step S06, necking step S07, trimming step S08, bottom reforming step S09, screw forming step S10, final necking step S11, final trimming step S12, curl step S13 and throttle step S14 Is done.

In the plate material punching step S01, for example, a rolled material (plate material) made of an aluminum alloy material or the like is punched to form a disc-shaped blank W0 as shown in FIG.
In the cupping step (drawing step) S02, the blank W0 is drawn (capping) by a cupping press and formed into a cup-like body W1 as shown in FIG.

In the DI step (drawing and squeezing step) S03, the DI body is used to re-draw and squeeze the cup-shaped body W1, and as shown in FIG. 2 (c), the can body (can body portion) 51 and the bottom of the can A bottomed cylindrical can W2 provided with (bottom of the can) 52 is formed. DI is an abbreviation for “Drawing & Ironing”. Specifically, the can W2 includes a can body 51 that is a cylindrical peripheral wall and a can bottom 52 that is a generally disc-shaped bottom wall. The central axis of the can body 51 of the can W2 and the central axis of the can bottom 52 are arranged coaxially with each other. In the present embodiment, these common axes are referred to as can axes.
In the DI process, the can bottom 52 is connected to the dome portion 55 that is recessed from the can bottom 52 along the can axis direction toward the opening end 51a side, and the outer peripheral edge of the dome portion 55, and extends along the can axis direction. An annular convex portion (rim) 56 that protrudes from the opening end portion 51a toward the can bottom 52 side and extends around the can axis is formed (see FIG. 9). The annular convex portion 56 includes a nose portion (grounding portion) 59 that protrudes most in the can axis direction at the can bottom 52, an inner peripheral wall (inner wall) 57 that is located inside the nose portion 59 in the can radial direction, and a nose portion 59. And an outer peripheral wall (outer wall) 58 positioned on the outer side in the can diameter direction.

  1 and 2, the can W2 that has undergone the DI step S03 has ears formed at the opening end portion 51a of the can body 51 and has a non-uniform height. Therefore, in the trimming step S04, a trimming device is used. The opening end 51a is trimmed to form a can W3 in which the height of the opening end 51a of the can body 51 is evenly aligned over the entire circumference, as shown in FIG. 2 (d).

  Next, after cleaning the can W3 to remove oil and the like, it is subjected to surface treatment and dried, and printing and coating of the outer surface of the can W3 (printing / coating (can outer surface) step S05) By applying (painting (can inner surface) step S06), a can W4 as shown in FIG. 2E is obtained.

  The can W4 is transferred to the bottle can manufacturing apparatus 1. Steps S07 to S14 described below are all manufacturing steps in the bottle can manufacturing apparatus 1. In the present embodiment, the can of the workpiece molded by the bottle can manufacturing apparatus 1 may be simply referred to as a can W.

The bottle can manufacturing apparatus 1 uses a plurality of types of die processing tools (necking molds) to perform die processing (necking processing) in a stepwise manner on the open end 51a of the can body 51 and the vicinity thereof. The portion 53 and the neck portion 54 are formed (necking step S07). The neck portion 54 is formed in a tapered shape that gradually decreases in diameter from the outermost diameter portion of the can body 51 toward the opening end portion 51a side from the can bottom 52 along the can axis direction. The base portion 53 is disposed at the opening end portion 51 a of the can body 51, is connected to the neck portion 54, and is formed in a cylindrical shape having the smallest diameter in the can body 51.
Further, if necessary, trimming processing of the opening end portion 51a having uneven heights is performed using a trimming tool of a rotary processing tool between a plurality of types of die processing (trimming step S08).
Thereby, as shown in FIG. 2 (f), a can W5 (W) having a base 53 and a neck 54 on the can body 51 is formed.

Then, a bottom reforming process is performed on at least one of the inner peripheral wall 57 and the outer peripheral wall 58 of the annular convex portion 56 of the can bottom 52 (bottom reforming step S09). In the example of the present embodiment, as shown in FIGS. 9 and 11, the bottom reforming process is performed on the inner peripheral wall 57 of the annular convex portion 56.
In FIG. 1, the bottom reforming step S09 is provided in a step before the final trimming step S12. Further, the bottom reforming step S09 is provided in a step before the screw forming step S10.

  In the example of the present embodiment, the bottom reforming process in the bottom reforming process S09 is performed at the same timing as a predetermined die process (for example, the last die process in step S07) among a plurality of die processes in the necking process S07. That is, a predetermined die process is performed on the vicinity of the open end 51a of the can body 51 of the can W, and at the same time, a bottom reform process is performed on the can bottom 52 of the can W.

Next, the base 53 of the can body 51 is subjected to screw forming using a screw forming tool of a rotary processing tool (screw forming step S10).
Further, the neck 53 is subjected to final necking using a plurality of types of die processing tools (final necking step S11), and final trimming is performed using a trimming tool of a rotary processing tool (final trimming step S12).

Next, the base 53 (opening end 51a) of the can body 51 is subjected to curling using a curling tool of a rotating tool (curling step S13), and a throttle processing tool (curl crushing tool) of the rotating tool. Is used to perform throttle processing (throttle process S14).
Thereby, the bottle can B as shown in FIG.2 (g) is manufactured. The bottle can B is filled with contents such as a beverage in a later process than the throttle process S <b> 14, and a cap is screwed onto the cap 53.

Next, the bottle can manufacturing apparatus 1 will be described.
3 and 4, the bottle can manufacturing apparatus 1 according to the present embodiment performs various forming processes including die processing and rotation processing on a bottomed cylindrical can (intermediate molded body can) W that is a workpiece. Is a so-called bottle necker that produces a bottle can B having a desired shape.

  The bottle can manufacturing apparatus 1 includes an apparatus main body 4, a holding table 3 supported by the apparatus main body 4 and provided with a plurality of cylindrical chucks 7 capable of holding cans W, and the holding table 3 penetrating in the direction of the table axis TA. Is provided with a plurality of processing tools 6 that are supported by the apparatus main body 4 via the shaft portion 5 and that are opposed to the holding table 3 from the direction of the table axis TA and that process the can body 51 of the can W. Table 2 is provided. The processing table 2 and the holding table 3 each have a central axis (table axis TA) extending in the horizontal direction, and these central axes are arranged coaxially with each other.

  The bottle can manufacturing apparatus 1 also includes a crank mechanism (reciprocating mechanism) 8 that reciprocates the processing table 2 in the direction of the table axis TA with respect to the holding table 3, and the holding table 3 about the table axis TA with respect to the processing table 2. And a table index mechanism 9 that intermittently rotates. That is, the machining table 2 reciprocates in the table axis TA direction. The processing table 2 reciprocates in the table axis TA direction with respect to the holding table 3 and the apparatus main body 4. The holding table 3 is intermittently rotated around the table axis TA. The holding table 3 is intermittently rotated around the table axis TA with respect to the processing table 2 and the apparatus body 4.

  The bottle can manufacturing apparatus 1 includes a supply wheel 10 that supplies the can W to the holding table 3, a discharge wheel 11 that discharges a processed can (made bottle can) B from the holding table 3, and a holding table 3. A wheel index mechanism 12 that rotates the supply wheel 10 and the discharge wheel 11 intermittently around the wheel axes SA and DA in synchronization with the intermittent rotation around the table axis TA is provided. That is, the supply wheel 10 rotates intermittently around the wheel axis SA in synchronization with intermittent rotation around the table axis TA of the holding table 3. The discharge wheel 11 rotates intermittently around the wheel axis DA in synchronization with the intermittent rotation around the table axis TA of the holding table 3.

  The bottle can manufacturing apparatus 1 includes a drive motor (not shown) for driving the crank mechanism 8, the table index mechanism 9, and the wheel index mechanism 12, and the bottom of the can W provided on the apparatus body 4 and held by the chuck 7. 52, the bottom reforming mechanism 13 disposed opposite to the processing table 2 along the direction of the table axis TA, and the bottom reforming mechanism 13 of the apparatus body 4 are different positions around the table axis TA (specifically, , Opposed to the working table 2 along the table axial direction TA from the opposite side to the can bottom 52 of the can W, which is provided at a position separated from the bottom reforming mechanism 13 in the holding table rotation direction R1). And a can discharge mechanism 14 to be arranged.

  The bottle can manufacturing apparatus 1 is provided in the apparatus main body 4, and a crank angle detection means (not shown) capable of detecting a crank angle described later, and a bottom reforming mechanism 13 based on the crank angle detected by the crank angle detection means. And a control unit (not shown) for operating the can discharge mechanism 14.

The definition of the direction (direction) used in the present embodiment is as follows.
A direction along the table axis TA (a direction in which the table axis TA extends) is referred to as a table axis TA direction.
The direction orthogonal to the table axis TA is referred to as the table radial direction. Of the table radial direction, the direction away from the table axis TA is referred to as the outer side of the table radial direction, and the direction approaching the table axis TA is referred to as the inner side of the table radial direction.
In addition, a direction that circulates around the table axis TA is referred to as a table circumferential direction. Of the table circumferential directions, the direction in which the holding table 3 is intermittently rotated with respect to the processing table 2 is referred to as a holding table rotation direction R1, and the opposite rotation direction is referred to as the opposite side to the holding table rotation direction R1. .

  The holding table rotation direction R1 is the same as the direction in which a plurality of processing tools 6 to be described later on the processing table 2 are arranged in the table circumferential direction in the order of processing to the can W. Therefore, the holding table rotation direction R1 can be referred to as the downstream side in the processing order to the can W (processing forward direction), and the side opposite to the holding table rotation direction R1 is referred to as the upstream side in the processing order to the can W. be able to.

Further, a direction along the center axis O of the chuck 7 described later (a direction in which the center axis O of the chuck 7 extends) is referred to as a center axis O direction. In the example of the present embodiment, the table axis TA and the center axis O of the chuck 7 are parallel to each other. Further, the can axis of the can W held on the chuck 7 substantially coincides with the central axis O of the chuck 7. That is, the central axis O of the chuck 7 and the can axis of the can W held by the chuck 7 are coaxial with each other.
A direction orthogonal to the central axis O of the chuck 7 is referred to as a chuck radial direction. Of the chuck radial direction, a direction away from the central axis O is referred to as an outer side in the chuck radial direction, and a direction approaching the central axis O is referred to as an inner side in the chuck radial direction. The chuck radial direction is the same direction as the can radial direction which is a direction perpendicular to the can axis of the can W held by the chuck 7.
Further, the direction around the central axis O of the chuck 7 is referred to as a chuck circumferential direction. The circumferential direction of the chuck is the same direction as the circumferential direction of the can, which is a direction around the can axis of the can W held by the chuck 7.

  3 and 4, the holding table 3 and the processing table 2 are repeatedly moved toward and away from each other in the table axis TA direction by the crank mechanism 8, and intermittently in the table circumferential direction by the table index mechanism 9. Relative rotation. Specifically, the machining table 2 moves toward and away from the holding table 3 in the direction of the table axis TA, and the holding table is moved relative to the machining table 2 during one approaching and separating stroke (reciprocating movement). 3 rotates (intermittently rotates) by a predetermined amount in the table circumferential direction.

Then, for each stroke in which the processing table 2 and the holding table 3 approach and separate, the can body 51 of the can W held by the chuck 7 of the holding table 3 is processed by the processing tool 6 provided on the processing table 2. The holding table 3 moves the can W to the downstream side (holding table rotation direction R1) in the processing order to the processing position by the next (another) processing tool 6.
By repeating this operation, the can W held by the holding table 3 is sequentially processed by the plurality of processing tools 6 provided on the processing table 2, and when a series of processing is completed, A bottle can B having a desired shape is manufactured.

  The holding table 3 is generally called a turntable or an index table. The holding table 3 has a disk shape or a circular ring shape. A plurality of chucks 7 are arranged along the circumferential direction of the table on the outer peripheral portion of the surface of the holding table 3 facing the processing table 2 side. Each of these chucks 7 holds a can W, and an open end 51a of the held can W opens toward the processing table 2. That is, the holding table 3 holds a plurality of cans W.

  In FIG. 9, the chuck 7 has a peripheral wall and a bottom wall. The can body 51 of the can W is fitted in the peripheral wall of the chuck 7. The peripheral wall of the chuck 7 is provided with an expandable ring 17 that elastically deforms due to air pressure and detachably holds the can body 51 of the can W. Of the can bottom 52 of the can W, a part of the outer peripheral wall 58 and the nose portion 59 are brought into contact with the bottom wall of the chuck 7. A portion of the bottom wall of the chuck 7 corresponding to the dome portion 55 of the can bottom 52 passes through the bottom wall in the direction of the central axis O of the chuck 7 and a pressing portion 20 of the bottom reforming mechanism 13 described later is inserted. An insertion hole 19 is formed.

  5 and 9, a through hole 18 penetrating in the direction of the table axis TA is formed in a portion of the holding table 3 corresponding to the chuck 7. The through hole 18 is disposed at a position overlapping the chuck 7 when viewed from the central axis O direction (table axis TA direction). In the example of the present embodiment, the through hole 18 has a circular shape and is arranged coaxially with the central axis O of the chuck 7. The bottom reforming mechanism 13 is inserted into the through hole 18. In the example of the present embodiment, the pressing portion 20 and the cylindrical body 29 of the bottom reforming mechanism 13 are inserted into the through hole 18.

3 and 4, the processing table 2 is generally called a die table. The processing table 2 has a disk shape or a circular ring shape. A plurality of processing tools 6 for processing the can W held by the holding table 3 are arranged on the processing table 2 along the circumferential direction of the table. These processing tools 6 are arranged along the table circumferential direction on the outer peripheral portion of the surface facing the holding table 3 side in the processing table 2, and each of the chucks 7 of the holding table 3 and the chucks 7 holds the chucks 7. The cans W are arranged to face each other from the direction of the table axis TA.
The processing tool axis (center axis) of the processing tool 6 of the processing table 2, the center axis O of the chuck 7 facing the processing tool 6 in the holding table 3, and the can axis of the can W held by the chuck 7 are: Are arranged coaxially with each other. Then, the can W is processed by the processing tool 6 in a state where the can axis of the can W and the processing tool axis substantially coincide with each other.

  A plurality of mounting holes are formed in the processing table 2 so as to penetrate in the table axis TA direction. The plurality of processing tools 6 are attached to these mounting holes in the order of processing into the can W.

  The plurality of processing tools 6 include a die processing tool and a rotation processing tool. In the present embodiment, a plurality of die processing tools and a plurality of rotation processing tools are detachably disposed in the plurality of mounting holes of the processing table 2 in the order of processing to the can W. In addition, some of the plurality of mounting holes may be empty spaces in which the processing tool 6 cannot be mounted. An oiling tool is disposed in some of the plurality of mounting holes.

  The die processing tool moves in a can axis direction (a direction parallel to the table axis TA) with respect to the can W, and draws the diameter of the peripheral wall (can body 51) of the can W or increases the diameter of the peripheral wall. Die processing such as processing is performed. That is, the plurality of types of die processing tools include a drawing (diameter reduction) processing tool and a diameter expansion processing tool. One type of die processing is performed on the can W by one die processing tool.

  The rotary processing tool moves around the can axis with respect to the can W, and the peripheral wall of the can W (can body 51) is rotated around the can axis to perform trimming processing, screw forming processing, curling processing, and throttle (curling crushing). ) Rotary processing such as processing is performed. That is, the plurality of types of rotation processing tools include a trimming processing tool, a screw forming processing tool, a curling processing tool, a throttle (curling crushing) processing tool, and the like. One rotation processing is performed on the can W by one rotation processing tool.

  The shaft portion 5 is provided integrally with the processing table 2 and extends on the table shaft TA. The shaft portion 5 penetrates the holding table 3 in the direction of the table axis TA and is movable in the direction of the table axis TA with respect to the holding table 3. It is. The shaft portion 5 is supported by the apparatus main body 4 so as to be slidable in the direction of the table axis TA, and the end opposite to the processing table 2 along the table axis TA direction is connected to a connecting rod (not shown) of the crank mechanism 8. It is connected.

Although not specifically shown, the crank mechanism 8 is connected to a drive shaft to which a rotational driving force from a drive motor is input, and is connected to the drive shaft, and is rotated around the central axis of the drive shaft as the drive shaft rotates. And a connecting rod for connecting the crankshaft and the shaft portion 5 to each other. The crankshaft rotates around the central axis of the drive shaft at a constant angular velocity.
The crank mechanism 8 converts the rotational motion around the central axis of the drive shaft input from the drive motor to the drive shaft into linear motion in the table axis TA direction and outputs the linear motion to the shaft portion 5.

  The crank angle detection means detects a crank angle that is a circumferential position of the crankshaft along the center axis of the drive shaft. The crank angle represents the angular position around the central axis while the crankshaft makes one rotation (360 ° rotation) around the central axis of the drive shaft. In the example of the present embodiment, the crank angle detection means is an angular position detection sensor (rotation angle sensor) such as a rotary encoder or resolver.

  The table index mechanism 9 has a cam structure (not shown). The table index mechanism 9 rotates and stops the rotation of the holding table 3 around the table axis TA (intermittently rotates) for each stroke of the reciprocating movement of the machining table 2 due to the cam structure.

The crank angle will be described.
The entire crank angle (0 to 360 °) around the center axis of the drive shaft includes a range of a dwell period and a range of an index period. The sum of the size of the central angle in the range of the stop angle and the size of the central angle in the range of the allocation angle is 360 °.

  The stop angle is an angle range in which the holding table 3 is not rotated around the table axis TA with respect to the processing table 2 by the table index mechanism 9 (an angular range of a crank angle at which the rotation of the holding table 3 is stopped). It is. The stationary angle includes the bottom dead center (crank angle 180 °). Within the range of the stop angle, the machining table 2 moves closer to the holding table 3 in the direction of the table axis TA, and various processes are performed on the can W that is a workpiece.

The allocation angle (index angle) is an angle range in which the holding table 3 is rotationally moved around the table axis TA with respect to the processing table 2 by the table index mechanism 9. The allocation angle includes top dead center (crank angle 0 °). Within the range of the allocation angle, the processing table 2 is sufficiently separated from the holding table 3 in the direction of the table axis TA, and the holding table is rotated to the position where the can W faces the processing tool 6 that performs the next processing. It is transferred to R1.
Specifically, in FIGS. 12 and 15, the holding table 3 rotates when the crank angle is an allocation angle, and the holding table 3 stops when the crank angle is a stop angle.

In FIG. 4, the supply wheel 10 is called an infeed wheel and has a substantially cylindrical shape. The supply wheel 10 receives the can W supplied to the shooter 15 from the outside (pre-process) of the bottle can manufacturing apparatus 1 and transfers the can W to the holding table 3.
The discharge wheel 11 is called a discharge wheel and has a substantially cylindrical shape. The discharge wheel 11 receives the can W (bottle can B) processed by the bottle can manufacturing apparatus 1 from the holding table 3, and transfers (discharges) it to the conveying means 16. The conveyance means 16 conveys the bottle can B toward the outside (post process) of the bottle can manufacturing apparatus 1.

The supply wheel 10 is supported by the apparatus main body 4 with its central axis (wheel axis) SA arranged parallel to the table axis TA. The supply wheel 10 is rotated in the wheel rotation direction R2 around the wheel axis SA.
The discharge wheel 11 is supported by the apparatus main body 4 with its central axis (wheel axis) DA arranged parallel to the table axis TA. The discharge wheel 11 is rotated in the wheel rotation direction R3 around the wheel axis DA.
Although not particularly shown, a plurality of concave pockets that can hold the can body 51 of the can W are formed on the outer peripheral surfaces of the supply wheel 10 and the discharge wheel 11 at intervals in the circumferential direction.

  The wheel index mechanism 12 has a cam structure (not shown). The wheel index mechanism 12 uses a cam structure to rotate and stop the supply wheel 10 around the wheel axis SA (intermittent rotation) and to rotate the discharge wheel 11 around the wheel axis DA for each stroke of the reciprocating movement of the machining table 2. Rotate and stop rotation (intermittent rotation).

The supply wheel 10 and the discharge wheel 11 are synchronized with the intermittent rotation around the table axis TA of the holding table 3 by the wheel index mechanism 12 and the wheel rotation direction R2 is reverse to the rotation direction R1 of the holding table 3. , R3 are rotated intermittently.
The supply wheel 10 and the discharge wheel 11 are mechanically connected by a gear (not shown) or the like, and intermittently rotate around the wheel shafts SA and DA in synchronization with each other.

Specifically, in FIG. 4, when the supply wheel 10 rotates intermittently and the can W held in the pocket of the supply wheel 10 is arranged at a position corresponding to the chuck 7 of the holding table 3 (directly above the chuck 7). In addition, the pushing portion provided on the processing table 2 pushes the can W toward the holding table 3, and the can W is transferred from the pocket to the chuck 7 and held by the chuck 7.
Further, the can W held by the chuck 7 of the holding table 3 is transferred in the holding table rotation direction R1 for each stroke of the processing table 2, and after finishing all processing, the position corresponding to the pocket of the discharge wheel 11 ( When the can discharge mechanism 14 to be described later pushes out the can W (bottle can B of the product subjected to all processing) toward the discharge wheel 11 side, the bottle can B is transferred from the chuck 7 to the pocket and held in the pocket.
The bottle can B held in the pocket is transported around the wheel axis DA along with the intermittent rotation of the discharge wheel 11, released from the pocket, and then transported by the transport means 16. It is transferred to the outside.

As shown in FIG. 5, the bottom reforming mechanism 13 is disposed between the holding table 3 and the apparatus main body 4 along the table axis TA direction and supported by the apparatus main body 4.
As shown in FIG. 4, when viewed from the table axis TA direction, the bottom reforming mechanism 13 is a position corresponding to the chuck 7 </ b> A facing a predetermined die machining tool among the plurality of machining tools 6 provided on the machining table 2. Is arranged. That is, when viewed from the table axis TA direction, the bottom reforming mechanism 13 is disposed at a position overlapping the chuck 7A facing the die processing tool. Further, a later-described center axis C2 of the bottom reforming mechanism 13 and a center axis O of the chuck 7A substantially coincide with each other (the center axes C2, O are arranged coaxially).

Specifically, the chuck 7A is held more than the chuck 7B facing the trimming processing tool (final trimming processing tool) that performs the final trimming processing on the can W among the plurality of processing tools 6 provided on the processing table 2. It is located on the opposite side to the table rotation direction R1 (that is, on the upstream side in the processing order for the can W). Further, the chuck 7A is on the opposite side of the holding table rotation direction R1 from the chuck 7C facing the screw forming tool that performs screw forming on the can W among the plurality of processing tools 6 provided on the processing table 2. Is located.
That is, when the bottle can manufacturing apparatus 1 is viewed from the table axis TA direction, the bottom reforming mechanism 13 provided in the apparatus body 4 is the final of the plurality of processing tools 6 arranged on the processing table 2 along the table circumferential direction. It is arrange | positioned on the opposite side (upstream side of the process order to the can W) to the holding table rotation direction R1 rather than the trimming process tool and the screw forming process tool.

  As shown in FIGS. 5 to 11, the bottom reforming mechanism 13 includes a pressing portion 20 that can contact the can bottom 52 of the can W held by the chuck 7, and the pressing portion 20 in the direction of the central axis O of the chuck 7. A first moving means 21 that moves the pressing portion 20 in the chuck radial direction, and a third moving means 23 that moves the pressing portion 20 in the chuck circumferential direction.

  The bottom reforming mechanism 13 is configured to support a support frame 24 fixed to the apparatus main body 4, a lift motor 25 provided on the support frame 24, and a rotational motion around the motor shaft of the lift motor 25 to rotate the central axis O of the chuck 7. Elevating cam 26 that converts to a reciprocating linear motion in the direction (table axis TA direction), a main body frame 27 connected to the elevating cam 26, and the main body frame 27 with respect to the support frame 24 as a central axis O of the chuck 7. And a lifting guide 28 that is slidably connected in the direction.

The bottom reforming mechanism 13 includes a cylindrical body 29 that is disposed coaxially with the central axis O of the chuck 7 in the main body frame 27, a pressing portion 20 that protrudes from the opening end of the cylindrical body 29 toward the chuck 7, and a cylindrical body. 29, a rotary lift shaft 30 that rotates about the central axis O (chuck circumferential direction) with respect to the cylindrical body 29 and moves in the direction of the central axis O, and a rotary lift shaft that is provided in the cylindrical body 29. The rotary motion of 30 is transmitted to the pressing portion 20 and the reciprocating linear motion of the rotary lifting shaft 30 in the direction of the central axis O is slid in the radial direction (chuck radial direction) perpendicular to the central axis O of the pressing portion 20. A link 31 for conversion, a rotary ball spline 32 for connecting the rotary lift shaft 30 to the main body frame 27 so as to be rotatable about the central axis O and slidably movable in the direction of the central axis O, and the main body frame 27 are provided. The rotation motor 33 that rotates the rotary elevating shaft 30 around the central axis O via the timing belt 34, the pressing motor 35 provided on the main body frame 27, and the rotational motion of the pressing motor 35 around the motor axis. Is provided with a pressing cam 36 that converts this into a reciprocating linear motion in the direction of the central axis O of the chuck 7 and transmits it to the rotary elevating shaft 30.
The central axes of the cylindrical body 29, the rotary elevating shaft 30, and the rotary ball spline 32 are coincident with each other, and this common axis is indicated by reference numeral C2. The central axis C2 is coaxial with the central axis O of the chuck 7. Moreover, the raising / lowering motor 25, the rotation motor 33, and the pressing motor 35 are a servomotor, a stepping motor, etc., for example.

  The pressing part 20 of this embodiment is a forming roller. The pressing portion 20 is a molding die having a disk shape, a cylindrical shape, or a columnar shape, and a central axis C <b> 1 extends parallel to the central axis O of the chuck 7. The pressing portion 20 is attached to the cylindrical body 29 so as to be rotatable about the central axis C1 and slidable in a radial direction perpendicular to the central axis C1.

  8 and 9, the central axis C <b> 1 of the pressing portion 20 is disposed coaxially with the central axis O of the chuck 7. On the other hand, in FIGS. 10 and 11, the pressing portion 20 is moved in the chuck radial direction by the action of the rotary lifting shaft 30 and the link portion 31, and the central axis C <b> 1 of the pressing portion 20 is the chuck 7. It is separated from the central axis O. The pressing portion 20 can contact the inner peripheral wall 57 of the annular convex portion 56 in the can bottom 52 of the can W held by the chuck 7.

  Specifically, a flange portion is formed on the outer peripheral edge portion of the pressing portion 20, and the length (thickness) of the flange portion in the central axis C <b> 1 direction is the can axis direction of the inner peripheral wall 57 of the annular protrusion 56. It is set smaller than the length of. Then, the flange portion of the pressing portion 20 abuts against the inner peripheral wall 57 of the annular convex portion 56 and presses the inner peripheral wall 57 toward the outer side in the chuck radial direction, whereby a concave portion is formed in the inner peripheral wall 57. The In the example of the present embodiment, the pressing portion 20 is rotationally moved around the central axis O of the chuck 7 by the third moving means 23, so that the inner peripheral wall 57 of the annular convex portion 56 extends along the can circumferential direction. A ring-shaped recess extending in the direction is formed.

The first moving means 21 reciprocates (reciprocates linearly) the main body frame 27 in the direction of the central axis O of the chuck 7 with respect to the main body frame 27 having the cylindrical body 29 to which the pressing portion 20 is attached and the support frame 24. A lifting motor 25, a lifting cam 26, and a lifting guide 28 are provided.
The first moving means 21 causes the pressing portion 20 to pass through the through hole 18 of the holding table 3 and the insertion hole 19 of the chuck 7 in the direction of the central axis O with respect to the can bottom 52 of the can W held by the chuck 7. It can be moved closer and away.

The second moving means 22 includes a main body frame 27 having a cylindrical body 29 to which the pressing portion 20 is attached, and a radial direction (chuck radial direction) perpendicular to the central axis O of the chuck 7 with respect to the cylindrical body 29. And a pressing motor 35 that reciprocates in the direction, a rotating cam 30, a rotary ball spline 32, and a link portion 31.
By the second moving means 22, the pressing portion 20 can move toward and away from the can bottom 52 of the can W held by the chuck 7 in the chuck radial direction.

The third moving means 23 rotates and moves the pressing portion 20 around the central axis O (chuck circumferential direction) of the chuck 7 with respect to the cylindrical body 29 and the main body frame 27 having the cylindrical body 29 to which the pressing portion 20 is attached. A rotation motor 33, a timing belt 34, a rotary ball spline 32, a rotary lift shaft 30 and a link portion 31 are provided.
By the third moving means 23, the pressing portion 20 can be rotated and moved in the chuck circumferential direction with respect to the can bottom 52 of the can W held by the chuck 7.

  Based on the crank angle detected by the crank angle detecting means, the control unit moves the lifting / lowering motor 25 of the first moving means 21, the pressing motor 35 of the second moving means 22, and the rotating motor of the third moving means 23. 33 is operated.

Next, with reference to the timing chart shown in FIG. 12, the bottom reforming process of the can W into the can bottom 52 by the bottom reforming mechanism 13 will be described.
In FIG. 12, when the crank angle falls within the range of the stopping angle, the rotation operation of the holding table 3 in the table circumferential direction stops. In the state where the holding table 3 is stopped, first, the first moving means 21 moves the pressing portion 20 closer to the can bottom 52 of the can W held by the chuck 7 in the direction of the central axis O.

Specifically, from the initial state of the bottom reforming process by the bottom reforming mechanism 13 shown in FIG. 5, the lifting motor 25 is operated by the control unit and the motor shaft is rotated, and the lifting cam 26 and the lifting guide 28 are moved. As a result, the pressing portion 20 moves forward (up) toward the chuck 7 along the central axis O direction together with the main body frame 27.
As shown in FIGS. 8 and 9, when the pressing portion 20 reaches the rising end in the direction of the central axis O, the control portion stops the rotation of the motor shaft of the lifting motor 25, and the pressing portion 20 is the bottom of the can W 52 is maintained close to 52.

Next, in FIG. 12, the second moving means 22 moves the pressing portion 20 toward the can bottom 52 of the can W held by the chuck 7 in the chuck radial direction.
Specifically, as shown in FIGS. 8 and 9, the pressing motor 35 is operated by the control unit from the state where the central axis C <b> 1 of the pressing unit 20 is disposed coaxially with the central axis O of the chuck 7. By the action of the pressing cam 36 having a cam roller eccentric with respect to the motor shaft by the rotation of the motor shaft, the rotary lifting shaft 30 reciprocated in the direction of the central axis O by the pressing cam 36, and the link portion 31, The pressing portion 20 moves toward the outside in the chuck radial direction. Thereby, the inner peripheral wall 57 of the annular convex part 56 of the can bottom 52 is pressed by the outer peripheral edge part (saddle part) of the pressing part 20, and the inner peripheral wall 57 has a concave part (dented outward in the can radial direction). (Not shown) is formed.
As shown in FIGS. 10 and 11, when the pressing unit 20 reaches the outer end in the chuck radial direction, the control unit stops the rotation of the motor shaft of the pressing motor 35, and the pressing unit 20 is an annular convex of the can bottom 52. The state of being pressed by the portion 56 is maintained.

Next, in FIG. 12, the pressing unit 20 is rotationally moved in the chuck circumferential direction by the third moving unit 23 with respect to the can bottom 52 of the can W held by the chuck 7.
Specifically, as shown in FIGS. 10 and 11, while the pressing portion 20 is pressed against the inner peripheral wall 57 of the annular convex portion 56, the rotation motor 33 is operated by the control portion and the motor shaft is A rotary ball spline 32 that rotates and is coupled to the motor shaft via a pulley and a timing belt 34, a rotary lift shaft 30 that is restricted from rotating about the central axis O with respect to the rotary ball spline 32, and a rotary lift shaft The pressing portion 20 rotates and moves in the chuck circumferential direction by the action of the link portion 31 whose rotation around the central axis O is restricted with respect to 30. As a result, the inner peripheral wall 57 of the annular convex portion 56 of the can bottom 52 is pressed by the outer peripheral edge portion (saddle portion) of the pressing portion 20 that rolls on the inner peripheral wall 57, and the inner peripheral wall 57 has a can circumferential direction. A ring-shaped recess (not shown) extending over the entire circumference is formed.
After the pressing unit 20 rolls on the inner peripheral wall 57 of the annular convex portion 56 over the entire circumference in the can circumferential direction, the control unit stops the rotation of the motor shaft of the motor 33 for rotation and moves the pressing unit 20 in the chuck circumferential direction. The rotational movement of is stopped.

Next, in FIG. 12, the pressing portion 20 is directed from the annular convex portion 56 of the can bottom 52 of the can W toward the inner side in the chuck radial direction (diameter center) by the second moving means 22 in the reverse procedure. Move away. Further, the first moving means 21 causes the pressing portion 20 to move backward (down) along the central axis O direction from the bottom 52 of the can W.
All the operations of the bottom reforming mechanism 13 described above are performed while the holding table 3 is stopped.

As shown in FIG. 13, the can discharge mechanism 14 is disposed between the holding table 3 and the apparatus main body 4 along the table axis TA direction and supported by the apparatus main body 4.
As shown in FIG. 4, the can discharge mechanism 14 is disposed at a position corresponding to the chuck 7 facing the pocket of the discharge wheel 11 when viewed from the table axis TA direction. That is, when viewed from the table axis TA direction, the can discharge mechanism 14 is disposed at a position overlapping the chuck 7 facing the pocket of the discharge wheel 11. Further, a later-described center axis C3 of the can discharge mechanism 14 and a center axis O of the chuck 7 substantially coincide with each other (the center axes C3 and O are arranged coaxially).

As shown in FIGS. 13 and 14, the can discharge mechanism 14 includes an extruding portion 40 that can contact the can bottom 52 of the can W held by the chuck 7, and the extruding portion 40 in the direction of the central axis O of the chuck 7. And a discharging means 43 that is moved to the position.
The discharge means 43 includes a first elevating unit 41 that moves the pushing unit 40 in the direction of the central axis O of the chuck 7, and the pushing unit 40 in the direction of the central axis O of the chuck 7 at a slower speed than the first elevating unit 41. A second elevating part 42 to be moved. That is, the amount of movement per unit time at which the first elevating unit 41 moves the pusher 40 in the direction of the central axis O (the speed at which the pusher 40 is moved in the direction of the central axis O) is determined by the second elevating unit 42. Is set to be larger than the amount of movement per unit time for moving in the direction of the central axis O. In other words, with respect to the amount of movement per unit time for the first elevating part 41 to move the pushing part 40 in the central axis O direction, the second elevating part 42 per unit time for moving the pushing part 40 in the central axis O direction. The amount of movement is set small.

The can discharge mechanism 14 includes a support frame 44 fixed to the apparatus main body 4, an elevating cylinder 45 provided on the support frame 44, a main body frame 47 connected to the piston rod 46 of the elevating cylinder 45, and a main body A cylindrical body 48 arranged coaxially with the central axis O of the chuck 7 in the frame 47, a discharge cylinder 49 provided in the main body frame 47, and a piston rod 50 of the discharge cylinder 49 within the cylindrical body 48. A ball spline 61 that is slidably supported in the direction and a joint 62 of the piston rod 50 are provided.
The central axes of the extruded portion 40, the cylindrical body 48, the ball spline 61, and the piston rod 50 are coincident with each other, and this common axis is indicated by a symbol C3 in the drawing. The central axis C3 is coaxial with the central axis O of the chuck 7. The lifting cylinder 45 and the discharge cylinder 49 are, for example, air cylinders.

  The extruded portion 40 of the present embodiment has a cylindrical shape or a columnar shape. In the illustrated example, the pushing portion 40 is disposed on the chuck 7 side along the central axis O direction from the cylindrical body 48. The pusher 40 is attached to the tip of the piston rod 50 of the discharge cylinder 49. The distal end surface of the pushing portion 40 facing the chuck 7 in the direction of the central axis O has a convex curved surface shape corresponding to (engaged with) the concave curved surface shape of the dome portion 55 of the can bottom 52 of the can W held by the chuck 7. ing. That is, in the sectional view along the central axes O and C3 shown in FIG. 13 (sectional view including the central axes O and C3), the radius of curvature formed by the concave curved surface portion of the dome portion 55 of the can W and the tip of the pushing portion 40 The curvature radii formed by the convex curved surface portions of the surfaces are substantially the same.

The first elevating unit 41 supports a main body frame 47 that supports the discharge cylinder 49 to which the pushing unit 40 is attached, and elevates and lowers the main body frame 47 in the central axis O direction with respect to the support frame 44 (reciprocating linear motion). Cylinder 45 and piston rod 46.
By the first elevating part 41, the pushing part 40 passes through the through hole 18 of the holding table 3 and the insertion hole 19 of the chuck 7 in the direction of the central axis O with respect to the can bottom 52 of the can W held by the chuck 7. It can be moved closer and away.
Further, what is indicated by reference sign S <b> 1 in FIG. 13 is a stroke in the direction of the central axis O of the pushing portion 40 by the first elevating portion 41. At the rising end where the pushing portion 40 is raised by the first lifting and lowering portion 41, the front end surface of the pushing portion 40 is disposed close to or in contact with the dome portion 55 of the can bottom 52 of the can W.

The second elevating part 42 includes a discharge cylinder 49 and a piston rod 50 that reciprocate the pushing part 40 in the direction of the central axis O with respect to the main body frame 47.
By the second elevating part 42, the pushing part 40 can push the can bottom 52 of the can W held by the chuck 7 toward the opening end 51 a side in the direction of the central axis O, and the side opposite to the pushing direction. Retreat towards. When the pushing portion 40 pushes out the can bottom 52, the can W held by the chuck 7 is released from the chuck 7 and delivered to the pocket of the discharge wheel 11.
Further, what is indicated by reference sign S <b> 2 in FIG. 13 is a stroke in the direction of the central axis O of the pushing portion 40 by the second elevating portion 42. The stroke S2 of the second elevating unit 42 is set smaller than the stroke S1 of the first elevating unit 41.

  And a control part operates the raising / lowering cylinder 45 of the 1st raising / lowering part 41 and the discharge | emission cylinder 49 of the 2nd raising / lowering part 42 based on the crank angle which the crank angle detection means detected.

Next, the discharge operation of the can W (bottle can B) from the chuck 7 by the can discharge mechanism 14 will be described with reference to the timing chart shown in FIG.
In FIG. 15, when the crank angle is within the range of the stopping angle, the rotation operation of the holding table 3 in the table circumferential direction is stopped. In a state where the holding table 3 is stopped, first, the first elevating part 41 moves the pushing part 40 closer to the can bottom 52 of the can W held by the chuck 7 in the direction of the central axis O.

Specifically, from the initial state of the can discharge operation by the can discharge mechanism 14 shown in FIG. 13, the lifting / lowering cylinder 45 is operated by the control unit, and the piston rod 46 advances toward the chuck 7 in the direction of the central axis O. Accordingly, the pushing portion 40 moves forward together with the main body frame 47 toward the chuck 7 in the direction of the central axis O.
When the pushing part 40 reaches the rising end in the direction of the central axis O according to the stroke S1 of the first lifting part 41, the control part maintains the piston rod 46 of the lifting cylinder 45 at the rising end position.

Next, in FIG. 15, the extruding part 40 is moved forward (raised) in the direction of the central axis O by the second elevating part 42, and the can bottom 52 of the can W held by the chuck 7 is pushed out from the chuck 7. The can W is detached (can discharge).
Specifically, as shown by a two-dot chain line in FIG. 13, the discharge cylinder 49 is operated by the control unit from the state in which the pushing portion 40 is disposed near or in contact with the can bottom 52 by the first elevating unit 41. The piston rod 50 moves forward (up) toward the opening end 51a side of the can W (that is, the processing table 2 side) along the central axis O direction. Move forward toward the opening end 51a side.
After the pushing portion 40 reaches the rising end in the direction of the central axis O according to the stroke S2 of the second lifting portion 42 and the can W is discharged from the chuck 7, the second lifting portion is performed in the reverse procedure to that described above. 42, the pushing portion 40 moves backward (down) in the direction of the central axis O. Further, the pushing portion 40 is moved backward in the direction of the central axis O by the first elevating portion 41.
All the operations of the can discharge mechanism 14 described above are performed while the holding table 3 is stopped.

  The bottle can manufacturing apparatus 1 of the present embodiment described above includes a bottom reforming mechanism 13. The bottom reforming mechanism 13 performs a bottom reforming process on the can bottom 52 of the can W held by the holding table 3. That is, according to this embodiment, it is possible to perform the bottom reforming process on the can bottom 52 of the can W in the bottle can manufacturing apparatus 1 without installing the bottom reforming apparatus in the pre-process and the post-process of the bottle can manufacturing apparatus 1. It is. In this way, the bottle can B manufactured by performing the bottom reforming process can reduce the thickness of the can bottom 52 (that is, the original plate thickness of the blank W0) because the strength of the can bottom 52 is increased and the pressure resistance is improved. While realizing the weight reduction of the can B, bottom growth and buckling can be reliably prevented. Therefore, an increase in equipment cost and installation space can be suppressed while reducing the weight of the bottle can B.

  In the present embodiment, the bottom reforming mechanism 13 includes the pressing portion 20 that can contact the can bottom 52 of the can W held by the chuck 7 of the holding table 3, and the pressing portion 20 is moved in the first movement. The means 21 moves in the direction of the central axis O of the chuck 7 (in the direction of the can axis of the can W held by the chuck 7), and the second moving means 22 moves in the direction of the chuck diameter (in the direction of the can diameter of the can W held by the chuck 7). Moving. As a result, the bottom reforming mechanism 13 can perform a bottom reforming process on the can bottom 52 of the can W.

  Specifically, the holding table 3 is intermittently rotated around the table axis TA with respect to the processing table 2 and the apparatus main body 4 by the table index mechanism 9, and the chuck 7 of the holding table 3 is moved to the bottom of the apparatus main body 4. When the first moving means 21 of the bottom reforming mechanism 13 is placed at a position corresponding to the reforming mechanism 13, the pressing portion 20 is placed at the center of the chuck 7 against the can bottom 52 of the can W held by the chuck 7. Move closer in the direction of axis O. As a result, the pressing portion 20 is directed from the chuck radial direction to the inner peripheral wall 57 of the annular convex portion 56 projecting toward the can bottom 52 side from the open end 51a along the can axis direction in the can bottom 52 of the can W. Opposed.

Next, the second moving means 22 of the bottom reforming mechanism 13 moves the pressing portion 20 in the chuck radial direction. Thereby, the pressing part 20 presses the inner peripheral wall 57 of the annular convex part 56 in the can bottom 52 of the can W to form a concave part in the can bottom 52 and perform a bottom reforming process.
In this way, the bottle can B manufactured by performing the bottom reforming process can reduce the thickness of the can bottom 52 (that is, the original plate thickness of the blank W0) because the strength of the can bottom 52 is increased and the pressure resistance is improved. While realizing the weight reduction of the can B, bottom growth and buckling can be reliably prevented.

In the present embodiment, the bottom reforming mechanism 13 includes the third moving means 23 that moves the pressing portion 20 in the chuck circumferential direction around the central axis O of the chuck 7.
That is, in this case, the third moving means 23 moves the pressing portion 20 in the chuck circumferential direction (can peripheral portion of the can W held by the chuck 7 from the state where the pressing portion 20 presses the can bottom 52 of the can W as described above. Direction). Thereby, the recessed part formed in the can bottom 52 of the can W by the press part 20 will extend in the chuck | zipper circumferential direction, the effect of improving the intensity | strength of the can bottom 52 stably along a can circumferential direction, The effect that the external appearance can be maintained well is obtained.

Moreover, in this embodiment, the press part 20 is the annular convex part 56 which protrudes toward the can bottom 52 side from the opening end part 51a along a can axial direction among the can bottoms 52 of the can W hold | maintained at the chuck | zipper 7. Since it can contact | abut to the inner peripheral wall 57, there exists the following effect.
That is, in this case, the pressing portion 20 of the bottom reforming mechanism 13 performs the bottom reforming process on the inner peripheral wall 57 of the annular convex portion 56 in the can bottom 52 of the can W held by the chuck 7. That is, the pressing part 20 moves from the inner side (center side) in the chuck radial direction to the outer side with respect to the inner peripheral wall 57 of the annular convex part 56 of the can bottom 52 to form a concave part. 52 and the can body 51 can be stably supported by the chuck 7 having a simple structure, and as a result, the bottom reforming process can be easily performed on the can bottom 52 with high accuracy. In this case, the appearance of the can bottom 52 of the can W can be easily maintained.

  In this embodiment, since the pressing part 20 of the bottom reforming mechanism 13 is a forming roller, the pressing part 20 that presses the can bottom 52 of the can W rolls on the can bottom 52 (annular convex part 56). Can be made. Thereby, the frictional resistance at the time of forming the concave portion on the can bottom 52 by the pressing portion 20 can be reduced to prevent the surface of the can bottom 52 from being scratched, and the formation region of the concave portion with respect to the can bottom 52 can be easily secured. be able to. Accordingly, the strength of the can bottom 52 can be more reliably and stably increased.

Moreover, in this embodiment, since the through-hole 18 which penetrates the press part 20 of the bottom reform mechanism 13 is formed in the part corresponding to the chuck | zipper 7 among the holding tables 3, there exist the following effects.
That is, in this case, the bottom reforming mechanism 13 is pressed against the can bottom 52 of the can W held by the chuck 7 by a simple structure in which the through hole 18 is formed in a portion of the holding table 3 corresponding to the chuck 7. The unit 20 can be easily accessed.
Further, in the present embodiment, the pushing portion 40 of the can discharge mechanism 14 is inserted into the through hole 18 of the holding table 3. Therefore, the pushing portion 40 of the can discharging mechanism 14 can be easily accessed with respect to the can bottom 52 of the can W held by the chuck 7.

In the present embodiment, the bottom reforming mechanism 13 is disposed at a position corresponding to the chuck 7A facing the die machining tool among the plurality of machining tools 6 provided on the machining table 2. Play.
That is, in this case, when the bottom reforming mechanism 13 performs the bottom reforming process on the can bottom 52 of the can W, the can of the can W is formed by the die processing tool facing the chuck 7A holding the can W from the processing table 2 side. Die processing is performed on the body 51. As a result, the can W is sandwiched between the die processing tool and the chuck 7A, and the attitude of the can W held by the chuck 7A is stabilized (particularly in the direction of the center axis O (can axis) of the chuck 7A). The movement of W is regulated), and the lift of the can W from the chuck 7A due to the bottom reforming process is surely prevented. Accordingly, the accuracy of the bottom reforming process is stably increased.

  In addition, in this case, it is not necessary to prepare a pressing member or the like for pressing the open end 51a of the can body 51, which has been conventionally required when performing the bottom reforming process, and the structure of the apparatus is simplified. In addition, since the bottom reforming process and the die processing are performed at the same time, the processing time does not increase as compared with the conventional case while the bottom reforming process is performed on the can W.

  In the present embodiment, as shown in FIG. 4, when the bottle can manufacturing apparatus 1 is viewed from the table axis TA direction, the bottom reforming mechanism 13 provided in the apparatus main body 4 is provided on the processing table 2 along the table circumferential direction. Among the plurality of processing tools 6 arranged, the holding table rotation direction R1 is opposite to the final trimming processing tool (processing tool 6 facing the chuck 7B) and the screw forming processing tool (processing tool 6 facing the chuck 7C). It arrange | positions (upstream side of the process order to the can W). For this reason, in the flowchart explaining the manufacturing process of the bottle can B shown in FIG. 1, the bottom reforming process S09 is provided in a process preceding the final trimming process S12. Further, the bottom reforming step S09 is provided in a step before the screw forming step S10. Thereby, there exists the following effect.

  That is, in the bottom reforming step S09, there is a possibility that the height of the can W in the can axis direction may be changed by performing the bottom reforming process on the can bottom 52, but the bottom reforming is performed as in the present embodiment. If the process is performed in a process preceding the final trimming process, the height accuracy in the can axis direction of the opening end 51a of the can W after the final trimming process is stably secured. That is, the accuracy of the height in the can axis direction from the can bottom 52 to the open end 51a in the can W after the final trimming process is ensured. Further, when the bottom reforming process is performed in a process prior to the screw forming process, the height accuracy in the can axis direction of the male threaded portion of the cap portion 53 of the can W after the screw forming process is stably secured. That is, the accuracy of the height in the can axis direction from the can bottom 52 to the male screw portion of the base portion 53 in the can W after the screw forming process is ensured. In addition, the accuracy of the length in the can axis direction (the height of the male screw portion to which the cap is screwed) from the male screw portion of the base portion 53 of the can W after the screw forming process to the opening end portion 51a is ensured stably. .

  In the present embodiment, the can discharge mechanism 14 is provided in the apparatus main body 4. That is, the bottle can manufacturing apparatus 1 includes the can discharge mechanism 14. The can discharge mechanism 14 includes an extruding portion 40 that can come into contact with the can bottom 52 of the can W held by the chuck 7, and a discharging means 43 that moves the extruding portion 40 in the direction of the central axis O of the chuck 7. ing. As a result, the following effects can be obtained.

In the present embodiment, as described above, the portion corresponding to the chuck 7 in the holding table 3 in order to easily access the pressing portion 20 of the bottom reforming mechanism 13 to the can bottom 52 of the can W held by the chuck 7. A through-hole 18 is formed in the upper surface. For this reason, it is difficult to apply the piston part provided in the part corresponding to each chuck | zipper of a holding table in the conventional bottle can manufacturing apparatus to the bottle can manufacturing apparatus 1 of this embodiment.
Therefore, in the present embodiment, the can discharge mechanism 14 for separating the can W held by the chuck 7 from the chuck 7 is provided. The can discharge mechanism 14 is provided not in the holding table 3 but in the apparatus main body 4.

  The can discharge mechanism 14 is disposed to face the can bottom 52 of the can W held by the chuck 7 from the side opposite to the processing table 2 along the table axis TA direction (that is, from the apparatus main body 4 side). The can discharge mechanism 14 has an extruding portion 40 that can come into contact with the can bottom 52 of the can W held by the chuck 7, and the discharging means 43 removes the extruding portion 40 in the direction of the central axis O of the chuck 7 (chuck 7 is moved in the direction of the can axis of the can W, the extruding portion 40 pushes out the can W, and the can W is detached (discharged) from the chuck 7 toward the processing table 2 along the table axis TA direction. Is done.

Further, in the present embodiment, the discharging means 43 includes a first elevating unit 41 that moves the extruding unit 40 in the direction of the central axis O of the chuck 7, and the extruding unit 40 at the center of the chuck 7 at a slower speed than the first elevating unit 41. Since it has the 2nd raising / lowering part 42 moved to the direction of an axis | shaft O, there exists the following effect.
In other words, in this case, the discharge means 43 has a first elevating part 41 and a second elevating part 42 that move the pushing part 40 in the direction of the central axis O of the chuck 7 at different speeds. Specifically, the second lift 42 moves the pusher 40 in the direction of the central axis O of the chuck 7 with respect to the speed at which the first lift 41 moves the pusher 40 in the direction of the central axis O of the chuck 7. The speed has been slowed down.

Therefore, when the can W is discharged from the chuck 7, first, the first lifting / lowering unit 41 that moves the pushing unit 40 is quickly moved until the pushing unit 40 comes close to or comes into contact with the can bottom 52 of the can W. Move to. Next, the second elevating part 42, which moves the extruding part 40 at a slow speed, presses the extruding part 40 against the can bottom 52 of the can W and pushes out the can W to release the can W from the chuck 7.
As a result, the discharge operation of the can W from the chuck 7 by the discharge means 43 is performed quickly, and the pushing portion 40 collides with the can bottom 52 at a high speed and damages the can bottom 52. Is prevented.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention, as will be described below.

  In the above-described embodiment, an example in which the bottom reforming mechanism 13 includes the pressing unit 20, the first moving unit 21, the second moving unit 22, and the third moving unit 23 has been described, but the present invention is not limited thereto. It is not something. In the bottle can manufacturing apparatus 1, the bottom reforming mechanism 13 is disposed opposite to the can bottom 52 of the can W held by the chuck 7 from the side opposite to the processing table 2 along the table axis TA direction. What is necessary is just to have the structure which can give a bottom reform process.

In the above-described embodiment, an example in which the pressing portion 20 of the bottom reforming mechanism 13 presses the inner peripheral wall 57 of the annular convex portion 56 of the can bottom 52 of the can W to form a concave portion has been described. It is not something. That is, the bottom reforming mechanism 13 includes a pressing portion 20 that can contact the can bottom 52 of the can W held by the chuck 7, and first moving means 21 that moves the pressing portion 20 in the direction of the central axis O of the chuck 7. The second moving means 22 for moving the pressing portion 20 in the chuck radial direction may be provided, and thus the following configuration may be employed.
For example, the first moving means 21 moves the pressing portion 20 closer to the can bottom 52 of the can W held by the chuck 7 in the direction of the central axis O of the chuck 7. The annular convex portion 56 of the can bottom 52 may be opposed to the outer peripheral wall 58 from the chuck radial direction. In this case, the second moving means 22 moves the pressing portion 20 from the outside in the chuck radial direction to the inside (center side), so that the pressing portion 20 can contact the outer peripheral wall 58 of the annular convex portion 56. At the same time, the outer peripheral wall 58 is pressed to form a recess in the can bottom 52 (bottom reforming is performed).
Or the press part 20 may be pressed with respect to both the inner peripheral wall 57 and the outer peripheral wall 58 of the annular convex part 56 of the can bottom 52, respectively, and a recessed part may be formed in the inner peripheral wall 57 and the outer peripheral wall 58, respectively.

In the above-described embodiment, the pressing portion 20 is a forming roller. However, the present invention is not limited to this. In other words, the pressing portion 20 may be a punch claw as shown in, for example, Patent Document 4 (Japanese Patent Laid-Open No. 11-244972) and Patent Document 5 (Japanese Patent Laid-Open No. 2000-197937) described above.
In this case, since the pressing portion 20 is a punch claw, the structure for moving the pressing portion 20 in the central axis O direction and the chuck radial direction of the chuck 7 can be simplified, and the concave portion is formed in the can bottom 52 by a simple operation. Can be formed quickly. Therefore, the processing speed of bottom reforming to the can bottom 52 is increased.
In addition, the 3rd moving means 23 which moves the press part 20 to the chuck | zipper circumferential direction does not need to be provided.

In the above-described embodiment, the bottom reforming mechanism 13 is disposed at a position corresponding to the chuck 7A facing the die processing tool among the plurality of processing tools 6 provided on the processing table 2. It is not limited to this.
That is, in the above-described embodiment, when the bottom reforming mechanism 13 performs the bottom reforming process on the can bottom 52 of the can W, the opening end 51a of the can body 51 of the can W is pressed while being molded by the die processing tool. However, instead of this, for example, the opening end 51a may be pressed by a pressing member provided on the processing table 2 without being processed. Furthermore, the pressing member may not be provided. That is, in the bottle can manufacturing apparatus 1, the expansion ring 17 that can be elastically deformed by air pressure is provided on the chuck 7, and the holding power of the can W is sufficiently secured by the expansion ring 17. It is also possible to perform bottom reforming processing without pressing the opening end 51a.

In the above-described embodiment, when the bottle can manufacturing apparatus 1 is viewed from the table axis TA direction, the bottom reforming mechanism 13 provided in the apparatus body 4 is arranged on the processing table 2 along the table circumferential direction. The tool 6 is arranged on the opposite side of the holding table rotation direction R1 from the final trimming tool and the screw forming tool (upstream side in the processing order to the can W). Although the process S09 is provided in the process before the final trimming process S12 and the screw forming process S10, the process is not limited to this.
That is, the bottom reforming mechanism 13 may be disposed so as to be opposed to any one of the chucks 7 holding the can W from the table axis TA direction among the plurality of chucks 7 arranged on the holding table 3. However, the present invention is not limited to a configuration in which only facing each other.

Further, in the above-described embodiment, the discharging unit 43 chucks the pushing unit 40 at a speed slower than the first lifting unit 41 and the first lifting unit 41 that reciprocates the pushing unit 40 in the direction of the central axis O of the chuck 7. Although the configuration including the second elevating unit 42 that reciprocates in the direction of the central axis O of 7 (that is, including the two elevating units) has been described as an example, the configuration is not limited thereto.
That is, the discharge means 43 may reciprocate the pushing portion 40 in the direction of the central axis O of the chuck 7 by, for example, one lifting portion, or the speed at which the pushing portion 40 is moved in the direction of the central axis O is different from each other. The extruding part 40 may be reciprocated in the direction of the central axis O of the chuck 7 by three or more elevating parts.

  In the above-described embodiment, the configuration in which the crank table 8 causes the machining table 2 to reciprocate in the table axis TA direction with respect to the holding table 3 has been described as an example. A reciprocating mechanism such as a mechanism may be used.

  In addition, in the range which does not deviate from the meaning of this invention, you may combine each structure (component) demonstrated by the above-mentioned embodiment, a modification, and a remark etc., addition of a structure, omission, substitution, others It can be changed. Further, the present invention is not limited by the above-described embodiments, and is limited only by the scope of the claims.

  According to the bottle can manufacturing apparatus of the present invention, it is possible to perform the bottom reforming process on the bottom of the can without installing the bottom reforming apparatus in a pre-process or a post-process of the bottle can manufacturing apparatus. Therefore, it has industrial applicability.

DESCRIPTION OF SYMBOLS 1 Bottle can manufacturing apparatus 2 Processing table 3 Holding table 4 Apparatus main body 5 Shaft part 6 Processing tool 7 Chuck 7A Chuck which opposes a die processing tool 8 Crank mechanism (reciprocating mechanism)
DESCRIPTION OF SYMBOLS 9 Table index mechanism 13 Bottom reforming mechanism 14 Can discharge | emission mechanism 18 Through-hole 20 Press part 21 1st moving means 22 2nd moving means 23 3rd moving means 40 Extrusion part 41 1st raising / lowering part 42 2nd raising / lowering part 43 Discharge means 51 Can body 51a Open end 52 Can bottom 56 Annular convex 57 Inner peripheral wall O Central axis of chuck TA Table axis W Can (can of intermediate molded body, workpiece)

Claims (10)

A plurality of cylindrical chucks capable of holding a bottomed cylindrical can, and a holding table that rotates intermittently around a table axis;
A plurality of processing tools for processing the can body of the can, a processing table that is disposed opposite to the holding table from the table axis direction and reciprocates in the table axis direction,
A bottle can manufacturing apparatus comprising: a bottom reforming mechanism disposed on the bottom of a can held by the chuck so as to face the can from the side opposite to the processing table along a table axial direction. The bottle can manufacturing apparatus according to claim 1,
The bottom reforming mechanism is
A pressing part capable of contacting the bottom of the can held by the chuck;
First moving means for moving the pressing portion in the direction of the central axis of the chuck;
A bottle can manufacturing apparatus comprising: a second moving unit configured to move the pressing portion in a chuck radial direction orthogonal to a central axis of the chuck. The bottle can manufacturing apparatus according to claim 2,
The bottle reformer manufacturing apparatus according to claim 1, wherein the bottom reforming mechanism includes third moving means for moving the pressing portion in the circumferential direction of the chuck around the central axis of the chuck. It is a bottle can manufacturing apparatus of Claim 2 or 3,
Of the can bottom of the can held by the chuck, the pressing portion is capable of abutting on an inner peripheral wall of an annular convex portion protruding toward the bottom of the can from an opening end along the can axis direction. Bottle can manufacturing equipment. The bottle can manufacturing apparatus according to any one of claims 2 to 4,
The said can part is a shaping | molding roller, The bottle can manufacturing apparatus characterized by the above-mentioned. The bottle can manufacturing apparatus according to claim 2,
The said can part is a punch nail | claw, The bottle can manufacturing apparatus characterized by the above-mentioned. It is a bottle can manufacturing device according to any one of claims 1 to 6,
The bottle can manufacturing apparatus according to claim 1, wherein a through hole through which the bottom reforming mechanism is inserted is formed in a portion of the holding table corresponding to the chuck. It is a bottle can manufacturing device according to any one of claims 1 to 7,
The bottom reforming mechanism is disposed at a position corresponding to the chuck facing the die processing tool among the plurality of processing tools provided on the processing table. It is a bottle can manufacturing device according to any one of claims 1 to 8,
A can discharge mechanism disposed on the bottom of the can held by the chuck, opposite to the processing table along the table axial direction,
The can discharge mechanism is
An extruding part capable of coming into contact with the bottom of the can held by the chuck;
A bottle can manufacturing apparatus, comprising: a discharge unit that moves the pushing portion in a central axis direction of the chuck. The bottle can manufacturing apparatus according to claim 9,
The discharging means is
A first elevating part that moves the pushing part in a central axis direction of the chuck;
A bottle can manufacturing apparatus, comprising: a second elevating unit that moves the pushing unit in a direction of a central axis of the chuck at a slower speed than the first elevating unit.

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