JP2018001254A - Molding processing unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a molding processing unit capable of performing molding processing on a cylindrical body, such as a can body or the like, without inserting a core into the cylindrical body.SOLUTION: A molding processing unit comprises: three or more processing shaft parts 11 arranged at intervals around a spindle shaft O; a molding processing part provided in at least one or more processing shaft parts 11 among the three or more processing shaft parts 11; a radial movement mechanism 40 for moving the three or more processing shaft parts 11 inwardly in a radial direction orthogonal to the spindle shaft O in synchronization with each other; a revolution mechanism 41 for revolving the three or more processing shaft parts 11 around the spindle shaft O in synchronization with each other; and a rotation mechanism 42 for rotating the three or more processing shaft parts 11 around a central axis of each processing shaft part 11 in synchronization with each other.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a molding unit that is provided in a can manufacturing apparatus that manufactures a bottle can, for example, and performs a molding process such as embossing on a can body (tubular body).

Conventionally, a can manufacturing apparatus for manufacturing a bottle can made of an aluminum alloy material or the like is known.
The can manufacturing apparatus includes a holding table and a processing table that are arranged to face each other. The holding table is generally called a turntable or an index table, and the processing table is generally called a die table. These tables have a disk shape or a circular ring shape, the central axis (table axis) extends in the horizontal direction, and the central axes of the tables are arranged coaxially with each other.

A plurality of bottomed cylindrical cans, which are workpieces, are held on the holding table along the table circumferential direction around the table axis.
In the processing table, a plurality of processing tools for processing the can are disposed along the circumferential direction of the table. 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 can axis direction (direction parallel to the table axis) with respect to the can and performs die processing such as drawing processing for reducing the diameter of the peripheral wall of the can and diameter expansion processing for expanding the diameter of the peripheral wall. The rotary processing tool moves around the can axis with respect to the can, and by rotating around the can axis, the peripheral wall of the can is subjected to rotational processing such as trimming, screw forming, curling, and throttle (curling caulking). Apply.

  The holding table and the processing table are repeatedly moved toward and away from each other in the table axis direction by the table driving unit provided in the main body frame of the can manufacturing apparatus, and are relatively rotated in the table circumferential direction intermittently. . 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 one stroke (reciprocal movement) of the approach and separation. Rotate in the direction by a predetermined amount.

Then, the can is processed for each stroke in which the tables approach and separate from each other, 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 A bottle can having the above has been manufactured.

Further, as the rotary processing tool, for example, an embossing unit (embossing tool) for embossing a can body (can peripheral wall) as shown in Patent Document 1 is known.
The embossing unit includes a core that is inserted into the can and is disposed to face the inner peripheral surface of the can body, and an outer core that is disposed to face the outer peripheral surface of the can body. The core and outer core sandwich the can body between them, and rotate around the can axis around the entire circumference of the can body (revolution) while rotating in reverse (rotating) around each axis in synchronization with each other by a gear mechanism or the like. ) And roll on the can body. Thereby, embossing is given to the can body.

Special Table 2000-515072

However, in the conventional embossing unit, the can body cannot be embossed after the bottle is necked.
Specifically, when bottle necking is applied to a can, the diameter gradually decreases between the body portion (maximum diameter portion) of the can body and the mouth portion along the can axis direction from the body portion to the mouth portion. A tapered neck is formed. For this reason, when trying to emboss the body after bottle necking, the core cannot pass through the mouth and neck (that is, cannot be inserted into the can), or even if it passes through. It could not reach the inner peripheral surface of the trunk and could not be embossed.

  In addition, the above-described problem is not limited to embossing, and the same applies to other molding processing using a core (for example, bead processing or remodeling processing).

  The present invention has been made in view of such circumstances. For example, with respect to a cylindrical body such as a can body, the cylindrical body is inserted without inserting a core into the cylindrical body. An object of the present invention is to provide a molding processing unit capable of performing molding processing.

  The molding unit of one aspect of the present invention includes three or more machining shaft portions arranged at intervals around a spindle axis, and at least one of the three or more machining shaft portions. A forming part provided in the shaft part, a radial movement mechanism for moving the three or more processing shaft parts inward in a radial direction orthogonal to the spindle axis, and the three or more A revolving mechanism for rotating the machining shaft portions around the spindle axis in synchronization with each other, and a rotation mechanism for rotating the three or more machining shaft portions around the center axis of each machining shaft portion, It is provided with.

For example, when the molding unit of the present invention is provided in a can manufacturing apparatus that manufactures a bottle can, the following excellent effects can be obtained.
First, a can, which is a workpiece, is arranged coaxially on the spindle shaft of the forming unit. At this time, with respect to the can body (tubular body) of the can, three or more machining shaft portions are arranged around the spindle axis at intervals from each other outside in the radial direction perpendicular to the spindle axis.

  The three or more machining shaft portions are moved inward in the radial direction orthogonal to the spindle axis while being synchronized with each other by the radial movement mechanism. As a result, the three or more machining shaft portions are brought into contact with the outer peripheral surface of the can body substantially simultaneously so as to support the can body from the periphery. Of these processing shaft portions, at least one or more processing shaft portions are provided with a forming portion such as an embossed portion.

The three or more machining shaft portions that are in contact with the can body are rotated (revolved) around the spindle axis in synchronization with each other by the revolution mechanism. That is, the three or more machining shaft portions rotate and move around the spindle shaft while maintaining a certain interval around the spindle shaft. Further, at this time, the three or more machining shaft portions are rotated (rotated) around the central axis of each machining shaft portion while being synchronized with each other by the rotation mechanism, and roll on the can body. As a result, the can body is subjected to a molding process such as a predetermined embossing process over the entire circumference or partially in the circumferential direction.
In the present invention, “three or more machining shaft portions are synchronized with each other” means that the time (and contents) of operation such as movement and rotation of three or more machining shaft portions are made to coincide with each other. It is to synchronize. In other words, the operations of the three or more machining shaft portions are linked in time.

  As described above, according to the present invention, the can body is formed by the forming portion of the processing shaft portion while the can body is stably supported from the outside in the radial direction by the three or more processing shaft portions. be able to. In other words, in the present invention, when the forming portion provided in the predetermined processing shaft portion presses the can body toward the inside in the radial direction to perform the forming processing, the other processing shaft portion other than the predetermined processing shaft portion. However, since the can body is supported toward the inside in the radial direction so as to receive the pressing force by the molding processing portion, a core as provided in a conventional molding processing unit is not required.

  In other words, the pressing forces applied by the three or more processing shafts from the outside in the radial direction to the can body act so as to balance each other, so that the can body is molded while being stably held. Therefore, the core for applying the pressing force from the inside of the can body so as to balance the pressing force of the outer core as in the conventional molding unit is unnecessary.

As described above, according to the present invention, it is possible to perform the molding process on the predetermined portion of the can body regardless of the shape of the portion other than the predetermined portion on which the molding process along the can axis direction is performed. it can. Accordingly, even after the bottle is necked, the can body can be subjected to various molding processes such as embossing, beading, and reforming.
The molding unit of the present invention is not limited to use in a can manufacturing apparatus that manufactures bottle cans, but also when used in other apparatuses, the inside of the cylindrical body is located inside various cylindrical bodies. It is possible to form the cylindrical body without inserting a child.

  In addition, the molding processing unit has a fulcrum shaft portion that is arranged around the spindle shaft and spaced from each other, and has the same number of fulcrum shaft portions as the processing shaft portion. It is preferable to rotate around the central axis of the fulcrum shaft and move inward in the radial direction.

In this case, the machining shaft portion can move inward in the radial direction perpendicular to the spindle axis by rotating around the fulcrum shaft portion, so that the machining shaft portion moves inward in the radial direction ( The movement toward the can body is smooth and stable.
Therefore, three or more machining shaft portions can be stably and surely brought into contact with the can body, and the above-described operational effects become more remarkable.

  The molding processing unit includes a block in which the processing shaft portion and the fulcrum shaft portion are disposed, and a housing that rotates around the spindle shaft and to which the fulcrum shaft portion is fixed. Preferably includes the block and the housing.

  In this case, by rotating the housing around the spindle axis, the fulcrum shaft portion fixed to the housing and the machining shaft portion disposed in the block together with the fulcrum shaft portion rotate around the spindle axis (revolution). Be made. That is, with a simple structure, three or more machining shaft portions can be rotated around the spindle shaft in synchronization with each other.

  In the molding processing unit, a first gear provided on a spindle shaft portion extending on the spindle shaft, a second gear provided on the fulcrum shaft portion and meshing with the first gear, and the processing shaft portion. And a third gear meshing with the second gear, and the rotation mechanism preferably includes the first gear, the second gear, and the third gear.

  In this case, since the first gear of the spindle shaft portion and the second gear of the fulcrum shaft portion are engaged, and the second gear of the fulcrum shaft portion and the third gear of the machining shaft portion are engaged, When the processing shaft portion rolls on the can body, the rotation (spinning) of the third gear of the processing shaft portion is caused by the rotation of the third gear of the other processing shaft portion via the first gear and the second gear. Synchronizes with rotation (spinning). Therefore, with a simple structure, three or more machining shaft portions can be rotated around the central axis of each machining shaft portion in synchronization with each other.

More specifically, the machining shaft portion provided with the third gear rotates relatively around the spindle shaft around the first gear via the second gear, and also around the central axis of the machining shaft portion. Rotates (spins). Such rotation of the machining shaft portion is performed stably and accurately in synchronization with each other between the three or more machining shaft portions.
That is, according to the above configuration, it is possible to roll three or more machining shaft portions on the can body while synchronizing each other with a simple structure.

  In the molding unit, a pressing unit that presses the processing shaft portion toward a radially inner side perpendicular to the spindle shaft, and a biasing force that urges the processing shaft portion toward a radially outer side. And the radial movement mechanism preferably includes the pressing means.

  In this case, the pressing means presses the processing shaft portion inward in the radial direction orthogonal to the spindle shaft, so that the forming process can be stably performed on the can body by this pressing force. In addition, since the biasing means biases the machining shaft portion outward in the radial direction perpendicular to the spindle shaft, the machining shaft portion after forming the can body has a complicated structure. In addition, it is possible to easily return to the arrangement state before the molding process (the initial state and the normal state other than during the molding process).

  According to the molding unit of the present invention, for example, a cylindrical body such as a can body can be molded without inserting a core into the cylindrical body. is there. Therefore, when this molding processing unit is provided in a can manufacturing apparatus for manufacturing bottle cans, even after bottle canning has been performed on the can, various processes such as embossing, bead processing, remodeling processing, etc. Can be processed.

It is a side view showing a schematic structure of a can manufacturing device concerning one embodiment of the present invention. It is a figure which shows the II-II cross section of FIG. It is a partial permeation | transmission top view which shows the embossing unit (molding process unit) attached to the process table. It is a longitudinal cross-sectional view which shows an embossing unit (molding unit). It is a partial see-through perspective view of an embossing unit (molding unit). It is a partial permeation | transmission perspective view (figure which shows the principal part as a longitudinal cross-section) explaining the internal structure of an embossing unit (molding unit). It is a partial permeation | transmission top view explaining the internal structure of an embossing unit (molding process unit).

Hereinafter, a can manufacturing apparatus 1 and an embossing unit (molding unit) 10 according to an embodiment of the present invention will be described with reference to the drawings.
1 and 2, the can manufacturing apparatus 1 of the present embodiment is a bottle having an expected shape by performing various bottle necking processes including a die process and a rotating process on a bottomed cylindrical can W. This is a so-called bottle necker that produces can B.

  The can W supplied as a workpiece to the can manufacturing apparatus 1 is a DI can that has been subjected to DI (Drawing & Ironing) processing, printing, and painting in the previous process. DI cans are obtained by applying a cupping process (drawing process), DI process (drawing and squeezing process), trimming process, printing process, painting process, etc. to a disc-shaped blank punched out of a plate material such as an aluminum alloy material. It is formed in a bottom cylinder shape.

In FIG. 4, a can W (bottle can B) is a cylindrical can body (cylindrical body, which is a peripheral wall of the can in this embodiment) 100 and a can bottom (bottom wall of the can). 101). The central axis of the can body 100 and the central axis of the can bottom 101 are arranged coaxially with each other. In the present embodiment, these common axes are referred to as can axes. The can W (bottle can B) shown in FIG. 4 represents a shape that has been subjected to bottle necking processing. The can body 100 has a body portion (maximum diameter portion) 102 and a mouth portion (open end portion). A tapered neck portion 104 that gradually decreases in diameter from the trunk portion 102 toward the mouth portion 103 along the can axis direction is formed between the small-diameter portion 103 and the small-diameter portion 103.
In FIG. 2, bottle can B manufactured by processing can W by can manufacturing device 1 is filled with contents such as a beverage in a subsequent process, and a cap is screwed.

  As shown in FIGS. 1 and 2, the can manufacturing apparatus 1 includes a processing table 2 and a holding table 3 that are arranged to face each other. 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.

In the present embodiment, the direction along the table axis TA (the direction in which the table axis TA extends) is referred to as the 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.

  1 and 2, the can manufacturing apparatus 1 includes a main body frame 4 that supports a processing table 2 and a holding table 3. The main body frame 4 is provided with a table driving unit, and the table driving unit includes a table driving motor, a connecting shaft 5, a crank mechanism, and the like.

  The processing table 2 and the holding table 3 are repeatedly relatively moved in the table circumferential direction intermittently in the table circumferential direction by the table driving unit of the main body frame 4 repeatedly moving toward and away from each other in the table axis TA direction. 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 holding table rotation direction R1 in the table circumferential direction.

Then, for each stroke in which the processing table 2 and the holding table 3 approach and separate from each other, the can W held by the holding table 3 is processed by the processing tool 6 provided on the processing table 2, and the holding table 3. Moves the can W toward the processing position by the next (another) processing tool 6 toward the downstream side of the processing order (holding table rotation direction R1).
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 (can holders) 7 are arranged along the table circumferential direction on the outer peripheral portion of the surface of the holding table 3 facing the processing table 2 side. These chucks 7 each hold a can W, and the open end of the held can W opens toward the processing table 2.

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 the table axis TA with respect to the plurality of cans W held by the holding table 3. They are opposed to each other from the direction.
Further, the processing tool axis (center axis) of the processing tool 6 of the processing table 2 and the can axis of the can W facing the processing tool 6 in the holding table 3 (that is, the center axis of the chuck 7) are arranged coaxially with each other. Is done. Then, the can W is processed by the processing tool 6 in a state where the can axis and the processing tool axis coincide with each other.

Although not particularly illustrated, the machining table 2 is formed with a plurality of mounting holes penetrating in the table axis TA direction and arranged in the table circumferential direction. The plurality of processing tools 6 can be attached to these mounting holes in the order of processing into the can W.
The mounting hole opens in the outer peripheral portion of the surface facing the holding table 3 side in the processing table 2, and is drilled to the surface facing the opposite side of the holding table 3 in this outer peripheral portion. The number of mounting holes formed in the processing table 2 is 50, for example.

  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 the direction of the can axis (direction parallel to the table axis TA) with respect to the can W, and draws the diameter of the peripheral wall (can body 100) of the can W or increases the diameter of the peripheral wall. Die processing such as processing is performed. 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 by the rotation around the can axis, the peripheral wall (can body 100) of the can W is trimmed, threaded, embossed, curled, and throttled. (Curl caulking) A rotating process such as a process is performed. One rotation processing is performed on the can W by one rotation processing tool.

The rotary processing tool is detachably mounted on the forming portion 19 for rotating the can W and the mounting hole of the processing table 2, and the forming portion 19 is attached to the mounting hole with a spindle axis (a central axis of the rotary processing tool). And a tool spindle 20 that rotatably supports around O (see FIG. 4). The tool spindle 20 is connected to a drive motor via a transmission member such as a belt, and the drive motor is disposed on the processing table 2. The tool spindle 20 is rotated around the spindle axis O by the rotational driving force transmitted from the driving motor, and the molding unit 19 performs a rotating process on the can W using this rotational force.
In the present embodiment, at least an embossing unit (molding unit) 10 for embossing (molding) the can body 100 is provided as a rotary processing tool. The embossing unit 10 will be described later separately.

  In FIG. 2, the main body frame 4 includes a can supply wheel 8 that supplies the can W to the holding table 3, and a can discharge wheel 9 that discharges the processed can W (bottle can B) from the holding table 3. I support it.

  The can supply wheel 8 is generally called a star wheel or an infeed wheel. The can supply wheel 8 has a columnar shape or a cylindrical shape, and its central axis (wheel axis SA) is arranged parallel to the table axis TA, and is rotatably supported by the main body frame 4.

  The can supply wheel 8 is synchronized with the intermittent rotation of the holding table 3 in the table circumferential direction, and in the wheel rotation direction R2 that is opposite to the holding table rotation direction R1 among the wheel circumferential directions around the wheel axis SA. Rotate intermittently. A plurality of recesses (pockets) having a concave arc shape in a cross-sectional view perpendicular to the wheel axis SA are formed on the outer peripheral surface of the can supply wheel 8 at equal intervals in the wheel circumferential direction. The peripheral wall (can body 100) is held.

  The can discharge wheel 9 is generally called a star wheel or a discharge wheel. The can discharge wheel 9 has a columnar shape or a cylindrical shape, and its central axis (wheel axis DA) is arranged parallel to the table axis TA, and is rotatably supported by the main body frame 4.

  The can discharge wheel 9 is synchronized with the intermittent rotation of the holding table 3 in the table circumferential direction, and in the wheel rotation direction R3 that is opposite to the holding table rotation direction R1 among the wheel circumferential directions around the wheel axis DA. Rotate intermittently. On the outer peripheral surface of the can discharge wheel 9, a plurality of concave portions (pockets) having a concave arc shape in a cross-sectional view perpendicular to the wheel axis DA are formed at equal intervals in the wheel circumferential direction. The peripheral wall (can body 100) of (bottle can B) is held. The bottle can B held in the concave portion is transferred around the wheel axis DA along with the intermittent rotation of the can discharge wheel 9, released from the concave portion, and then transferred to the outside of the can manufacturing apparatus 1.

What is shown in FIGS. 3 to 7 is an embossing unit (embossing tool) 10. The embossing unit 10 is a type of molding unit. In addition to the embossing unit 10 cited as an example in this embodiment, the forming unit includes a processing unit (processing tool) that performs various forming processes on the can body 100, such as a bead processing unit or a remodeling unit. .
Since the embossing unit (molding unit) 10 is a rotating tool for the processing tool 6, the embossing unit (molding unit) 10 includes the above-described forming unit 19 and tool spindle 20.

In the following description of the embossing unit 10, a direction along the spindle axis (rotation center axis of the tool spindle 20) O of the embossing unit 10 (direction in which the spindle axis O extends) is referred to as a spindle axis O direction. In the present embodiment, the spindle axis O and the table axis TA are parallel to each other.
A direction perpendicular to the spindle axis O is referred to as a spindle radial direction. Of the spindle radial directions, the direction away from the spindle axis O is referred to as the outside of the spindle radial direction, and the direction approaching the spindle axis O is referred to as the inside of the spindle radial direction.
Further, a direction around the spindle axis O is referred to as a spindle circumferential direction.

The embossing unit 10 includes at least one machining shaft portion 11 among the three or more machining shaft portions 11 and the three or more machining shaft portions 11 that are spaced apart from each other around the spindle axis O. A radial movement mechanism 40 that moves the provided embossing part (molding part) 12A and three or more machining shaft parts 11 inward in a radial direction perpendicular to the spindle axis O in synchronization with each other; A revolving mechanism 41 that rotates three or more machining shaft portions 11 around the spindle axis O in synchronization with each other, and three or more machining shaft portions 11 around the central axis of each machining shaft portion 11 in synchronization with each other. A rotation mechanism 42 that rotates the rotation mechanism 42.
In the present embodiment, “three or more machining shaft portions 11 are synchronized with each other” means that the time (and content) of operation such as movement and rotation of the three or more machining shaft portions 11 is mutually equal. To match, to synchronize. In other words, the operations of the three or more machining shaft portions 11 are linked in time.

  Further, the embossing unit 10 is arranged around the spindle axis O with a space between each other, and a fulcrum shaft part 13 provided in the same number as the machining shaft part 11, and a pair (pair) of the machining shaft part 11 and the fulcrum shaft part 13. Are arranged, and the processing shaft portion 11 and the fulcrum shaft portion 13 are rotatably supported around the central axis of each shaft portion 11, 13 and the spindle shaft O is rotated. A fixed housing (second housing 22 and third housing 23 described later), a spindle shaft portion 15 extending on the spindle shaft O, and a gear having a first gear 31, a second gear 32, and a third gear 33 described later. A mechanism, a pressing means 17 for pressing the machining shaft portion 11 toward the inside in the radial direction perpendicular to the spindle axis O, and a biasing force for pushing the machining shaft portion 11 toward the outside in the radial direction perpendicular to the spindle shaft O. Force And 16, and a. The machining shaft portion 11, the fulcrum shaft portion 13, and the spindle shaft portion 15 extend along the spindle axis O (in parallel with the spindle axis O).

  In the example of the present embodiment, the embossing unit 10 is provided with three machining shaft portions 11. These machining shaft portions 11 are arranged at equal intervals in the spindle circumferential direction (at a pitch of 120 ° in the example of this embodiment). Note that the three or more machining shaft portions 11 may be arranged at unequal intervals in the spindle circumferential direction. In a normal state other than the time of embossing (during molding), the processing shaft portion 11 is more in the spindle radial direction than the virtual cylindrical surface corresponding to the outer diameter of the body (maximum diameter portion) 102 of the can body 100 of the can W. Arranged outside.

Further, of the three machining shaft portions 11, a predetermined machining shaft portion 11 is fitted to a tip portion of the machining shaft portion 11 (an end portion on the holding table 3 side along the central axis direction of the machining shaft portion 11). An embossing part (molding part) 12A is provided in which a convex part (predetermined molding process shape) for embossing (for molding process) is formed on the outer peripheral surface.
Of the three processing shaft portions 11, the processing shaft portion 11 other than the predetermined processing shaft portion 11 has a cylindrical shape that fits the tip end portion of the processing shaft portion 11, and has an outer peripheral surface for embossing. The process support part 12 in which the convex part is not formed is provided.
The positions along the spindle axis O direction of the embossed portion 12A and the processing support portion 12 are the same.

  In the example of the present embodiment, as the three processing shaft portions 11, one predetermined processing shaft portion 11 including the embossing portion 12A is provided, and another processing shaft portion including the processing support portion 12 (predetermined processing shaft portion). Two machining shaft portions (11) other than the shaft portion 11 are provided. However, the present invention is not limited to this, and two or more predetermined machining shaft portions 11 may be provided, or all the machining shaft portions 11 may be provided with the predetermined machining shaft portion 11 including the embossing portion 12A. May be.

  As shown in FIG. 4, the embossing section 12A and the processing support section 12 of the plurality of processing shaft sections 11 are such that the holding table 3 and the processing table 2 are in the table axis TA direction (the vertical direction in FIG. When it moves close to (O direction), the can W (bottle can B) is opposed to the body portion (maximum diameter portion) 102 of the can body 100 from the outside in the radial direction.

  In FIG. 4, the molding unit 19 of the embossing unit 10 includes a first cylindrical tubular housing 21 connected to the tool spindle 20 in a state where rotation around the spindle axis O with respect to the tool spindle 20 is restricted, Provided in the first housing 21, urged toward the holding table 3 side from the processing table 2 along the spindle axis O direction with respect to the first housing 21, and movable in the spindle axis O direction. A top-cylindrical second housing 22, a top-cylindrical third housing 23 connected to the second housing 22 so as to close an opening end of the second housing 22 facing the holding table 3; A pressing ring 24 that is rotatably attached to the third housing 23 and protrudes toward the holding table 3 is provided.

Inside the second housing 22 and the third housing 23, a processing shaft portion 11, a fulcrum shaft portion 13, a block 14, and a spindle shaft portion 15 are disposed.
Further, a gear mechanism is accommodated between the top wall of the second housing 22 and the top wall of the third housing 23. Specifically, the first gear 31 provided on the spindle shaft portion 15; A second gear 32 provided on the fulcrum shaft portion 13 and meshed with the first gear 31 and a third gear 33 provided on the machining shaft portion 11 and meshed with the second gear 32 are disposed.

  In this embodiment, the revolution mechanism 41 includes the block 14 and the housing (the second housing 22 and the third housing 23). A fulcrum shaft portion 13 and a processing shaft portion 11 are disposed in the block 14, and the fulcrum shaft portion 13 is fixed to the second housing 22 and the third housing 23. Therefore, when the tool spindle 20 is rotated about the spindle axis O and the second housing 22 and the third housing 23 are rotated about the spindle axis O along with this, the fulcrum fixed to the housings 22 and 23 is supported. Together with the shaft portion 13, the block 14 and the processing shaft portion 11 rotate around the spindle axis O. Accordingly, the three or more machining shaft portions 11 are rotated (revolved) around the spindle axis O in synchronization with each other.

  The rotation mechanism 42 includes a first gear 31, a second gear 32, and a third gear 33. Then, by the gear mechanism including the first gear 31, the second gear 32, and the third gear 33, the three or more machining shaft portions 11 rotate around the central axis of each machining shaft portion 11 in synchronization with each other ( Rotation) is possible.

  The first gear 31 is disposed coaxially with the spindle shaft portion 15, the second gear 32 is disposed coaxially with the fulcrum shaft portion 13, and the third gear 33 is disposed coaxially with the machining shaft portion 11. The first gear 31, the second gear 32, and the third gear 33 have the same position along the spindle axis O direction. In the example of this embodiment, the outer diameters of the first gear 31, the second gear 32, and the third gear 33 are reduced in this order.

4 to 6, the spindle shaft portion 15 is fixed to the top wall of the third housing 23. The spindle shaft portion 15 is provided through the top wall of the third housing 23 in the thickness direction.
A first gear 31 is provided in a portion of the spindle shaft portion 15 that is located on the processing table 2 side (upper side in FIGS. 4 and 6) along the spindle axis O direction from the top wall of the third housing 23. Yes. A can retainer 25 is provided in a portion of the spindle shaft portion 15 located on the holding table 3 side (lower side in FIGS. 4 and 6) along the spindle axis O direction from the top wall of the third housing 23. Yes. When the can body 100 is embossed by the embossing unit 10, the can presser 25 is brought into contact with the mouth portion 103 of the can W and restricts the movement of the can W.

  The first gear 31 is attached to the spindle shaft portion 15 via a bearing 26 and is rotatable about the central axis (spindle shaft O) with respect to the spindle shaft portion 15. In the example of the present embodiment, a pair of bearings 26 are provided at both ends along the central axis direction of the spindle shaft portion 15 inside the first gear 31.

Both end portions along the central axis direction of the fulcrum shaft portion 13 are fixed to the top wall of the second housing 22 and the top wall of the third housing 23. The fulcrum shaft portion 13 is provided through the block 14 accommodated between the top wall of the second housing 22 and the top wall of the third housing 23 in the spindle axis O direction.
The fulcrum shaft portion 13 is attached to the block 14 via a bearing 27 and is rotatable about the central axis of the fulcrum shaft portion 13. In other words, the block 14 can rotate around the central axis of the fulcrum shaft portion 13 with respect to the fulcrum shaft portion 13 fixed to the second housing 22 and the third housing 23. In the example of the present embodiment, a pair of bearings 27 are provided at both end portions along the central axis direction of the fulcrum shaft portion 13 inside the block 14.

The second gear 32 is disposed at an intermediate portion located between both end portions along the central axis direction of the fulcrum shaft portion 13. In the illustrated example, the second gear 32 is disposed between the pair of bearings 27 along the central axis direction of the fulcrum shaft portion 13.
The second gear 32 is attached to the fulcrum shaft portion 13 via the bearing 28 and is rotatable about the central axis with respect to the fulcrum shaft portion 13. In the example of the present embodiment, a pair of bearings 28 are provided at both end portions along the central axis direction of the fulcrum shaft portion 13 inside the second gear 32.

  The processing shaft portion 11 is provided so as to penetrate the top wall of the third housing 23 in the thickness direction. A portion of the machining shaft portion 11 that is located on the machining table 2 side (upper side in FIGS. 4 and 6) along the spindle axis O direction than the top wall of the third housing 23 is attached to the block 14 via a bearing 29. (In FIG. 4, the block 14 on which the machining shaft portion 11 is disposed is not shown). That is, the processing shaft portion 11 is rotatable about the central axis of the processing shaft portion 11 with respect to the block 14. In the example of the present embodiment, a pair of bearings 29 are provided at both end portions along the central axis direction of the machining shaft portion 11 inside the block 14.

The third gear 33 is disposed at a portion corresponding to the block 14 along the central axis direction in the machining shaft portion 11. In the illustrated example, the third gear 33 is disposed between the pair of bearings 29 along the central axis direction of the machining shaft portion 11.
The third gear 33 is directly attached (fitted) to the machining shaft 11 and is restricted from rotating around the central axis with respect to the machining shaft 11 by a key structure or the like. Has been.

Further, in the processing shaft portion 11, the embossed portion 12 </ b> A and the portion positioned on the holding table 3 side (the lower side in FIGS. 4 and 6) along the spindle axis O direction from the top wall of the third housing 23. One of the processing support portions 12 is provided.
In the example of the present embodiment, the axial length of the portion of the processing shaft portion 11 that is located closer to the holding table 3 along the spindle axis O direction than the top wall of the third housing 23 is the top wall of the third housing 23. It is made longer than the axial length of the portion located on the processing table 2 side along the spindle axis O direction.

  3 to 7, the block 14 has a substantially rectangular parallelepiped shape. The block 14 is disposed between the top wall of the second housing 22 and the top wall of the third housing 23 and slightly spaced from these top walls. The block 14 is provided with one fulcrum shaft portion 13 and one machining shaft portion 11. The number of blocks 14 is the same as the number of pairs (sets) of the fulcrum shaft portion 13 and the processing shaft portion 11. In the example of this embodiment, the number of pairs (sets) of the fulcrum shaft portion 13 and the machining shaft portion 11 is three, and thus the number of blocks 14 is three.

  The block 14 is provided with a cam follower (roller) 30 having a cylindrical shape so as to be rotatable about its axis. The shaft of the cam follower 30 extends along the spindle circumferential direction (but linearly), and the outer peripheral surface of the cam follower 30 is in contact with the inner peripheral surface of the peripheral wall of the first housing 21. The cam follower 30 can roll on the inner peripheral surface of the peripheral wall of the first housing 21 along the spindle axis O direction.

Specifically, in FIG. 4, when the first housing 21 moves from the processing table 2 toward the holding table 3 along the spindle axis O direction with respect to the second housing 22 (that is, the top wall of the first housing 21). When the cam follower 30 approaches the top wall of the second housing 22, the cam follower 30 follows the shape of the concave portion 34 formed on the inner peripheral surface of the first housing 21 (specifically, the depth of the concave portion 34). 4 is moved toward the inner side in the spindle radial direction (as the cam follower 30 is shown in FIG. 4). Omitted). That is, the cam follower 30 is pressed by the inner peripheral surface of the first housing 21 and moves inward in the spindle radial direction.
In the present embodiment, the cam follower 30 and the first housing 21 are provided as the pressing means 17 that presses the machining shaft portion 11 toward the inside in the spindle radial direction. Specifically, the pressing means 17 is directed inward in the spindle radial direction so as to rotate the machining shaft portion 11 disposed in the block 14 around the central axis of the fulcrum shaft portion 13 together with the block 14. Press. That is, in the example of the present embodiment, the pressing unit 17 presses the processing shaft portion 11 toward the inside in the spindle radial direction via the block 14.

  In the present embodiment, the radial movement mechanism 40 includes the pressing unit 17. As will be described later, the radial movement mechanism 40 rotates the machining shaft portion 11 around the central axis of the fulcrum shaft portion 13 and moves it toward the inside in the spindle radial direction.

  In FIG. 7, when the cam follower 30 that rolls on the inner peripheral surface of the first housing 21 is moved inward in the spindle radial direction, the block 14 provided with the cam follower 30 is positioned at the center of the fulcrum shaft portion 13. By rotating around the axis, the machining shaft 11 is moved inward in the spindle radial direction. In other words, the machining shaft portion 11 can rotate around the central axis of the fulcrum shaft portion 13 and move inward in the spindle radial direction. Specifically, the cam followers 30 provided in the three or more blocks 14 are simultaneously pressed toward the inner side in the spindle radial direction by the inner peripheral surface of the first housing 21, and accordingly, the three or more machining shaft portions 11. Are movable inward in the spindle radial direction in synchronization with each other. FIG. 7 shows an arrangement state (innermost end position) in which the cam follower 30, the block 14, and the machining shaft portion 11 are moved most inward in the spindle radial direction.

  Further, for example, the inner diameter of the cam follower 30 in the spindle radial direction and the spindle of the cam follower 30 are set by variously setting the outer diameter of the cam follower 30, the depth of the recess 34, the inner diameter of the inner peripheral surface of the first housing 21, and the like. It is possible to adjust the amount of movement toward the inside in the radial direction. Thereby, the innermost end position of the machining shaft portion 11 in the spindle radial direction and the amount of movement of the machining shaft portion 11 moving inward in the spindle radial direction can be adjusted as appropriate. Alternatively, for example, by appropriately setting the positional relationship among the fulcrum shaft portion 13, the processing shaft portion 11 and the cam follower 30 disposed in the block 14, the innermost end position of the processing shaft portion 11 in the spindle radial direction, The amount of movement of the machining shaft portion 11 toward the inside in the spindle radial direction can also be adjusted as appropriate.

3, 5, and 7, what is indicated by reference numeral 35 is a stopper. The stopper 35 is provided between the top wall of the second housing 22 and the top wall of the third housing 23, and is disposed adjacent to the block 14.
As shown in FIG. 7, the biasing means 16 provided in the block 14 is in contact with the stopper 35. In the illustrated example, the biasing means 16 includes a compression coil spring and a plunger, and the plunger abuts against the stopper 35. In the example shown in the figure, the block 14 rotated and moved around the central axis of the fulcrum shaft portion 13 is in contact with the stopper 35, but the block 14 may not be in contact with the stopper 35.

The biasing means 16 biases the block 14 and the cam follower 30 outward in the spindle radial direction, and biases the machining shaft portion 11 provided in the block 14 outward in the spindle radial direction. doing.
In a state in which the cam follower 30, the block 14, and the processing shaft portion 11 are moved inward in the spindle radial direction, the first housing 21 extends along the spindle axis O direction with respect to the second housing 22 in FIG. 4. When moving from the holding table 3 toward the processing table 2 side (that is, when the top wall of the first housing 21 and the top wall of the second housing 22 are separated from each other), the cam follower 30, The block 14 and the processing shaft portion 11 have the shape of the recess 34 formed on the inner peripheral surface of the first housing 21 (specifically, the depth of the recess 34 extends along the spindle axis O direction). As it goes deeper toward the side), it is moved outward in the spindle radial direction. That is, the cam follower 30, the block 14, and the machining shaft portion 11 move toward the outside in the spindle radial direction while being urged by the urging means 16, and are in a normal state (embossing) other than during embossing (molding) It is returned to the initial position before (molding). For this reason, the urging means 16 can be rephrased as “return means”.

In FIG. 4, a cylindrical surface 36 that is slidably in contact with the body portion 102 of the can body 100 of the can W is formed on the inner peripheral surface of the presser ring 24.
When the embossing unit 10 moves forward with respect to the can W, the presser ring 24 comes into contact with the body 102 of the can body 100 from the outside in the spindle radial direction, and the can W moves in the spindle radial direction. To regulate.

  3 and 4, what is indicated by reference numeral 37 is a stopper member. When the pressing ring 24 comes into contact with the stopper member 37 from the spindle axis O direction, the holding table 3 such as the third housing 23, the second housing 22, the block 14, and the processing shaft portion 11 together with the pressing ring 24. And the most advanced position in the spindle axis O direction with respect to the can W is determined.

In FIG. 4, what is indicated by reference numeral 38 is a bearing that connects the presser ring 24 and the third housing 23 so as to be relatively rotatable about the spindle axis O.
Reference numeral 39 denotes a bearing for connecting the mounting hole of the machining table 2 and the tool spindle 20 of the embossing unit 10 so as to be relatively rotatable about the spindle axis O.

The embossing unit (molding unit) 10 configured as described above is configured such that the can W (bottle can B) held by the chuck 7 is disposed opposite to the embossing unit 10 in the spindle axis O direction. As the processing table 2 moves forward (approaching) with respect to the holding table 3, first, the cylindrical surface 36 of the press ring 24 is fitted from the neck portion 104 of the can body 100 to the body portion (maximum diameter portion) 102.
Next, the pressing ring 24 comes into contact with the stopper member 37, and further forward movement of the second housing 22 and the third housing 23 with respect to the holding table 3 and the can W is restricted.

  From this state, the processing table 2 further moves forward with respect to the holding table 3, and accordingly, the first housing 21 moves closer to the second housing 22 from the direction of the spindle axis O, and these second housings are moved. The distance in the spindle axis O direction between 22 and the first housing 21 is narrowed.

  At this time, the concave portion 34 on the inner peripheral surface of the first housing 21 is engaged with the concave portion 34 corresponding to the taper shape that gradually decreases in diameter toward the processing table 2 side in the spindle axis O direction. The cam follower 30 that rolls rolls on the inner peripheral surface of the first housing 21 while being gradually pressed inward in the spindle radial direction along the tapered shape. Along with this, the processing shaft portion 11 moves inward in the spindle radial direction while rotating around the central axis of the fulcrum shaft portion 13 together with the block 14. Then, the embossed portions (molding portions) 12A or the processing support portions 12 provided on the three or more processing shaft portions 11 are brought into contact with the outer peripheral surface of the body portion 102 of the can body 100 almost simultaneously.

  Thereby, the trunk | drum 102 of the can W is hold | gripped between the three or more process axial parts 11, and a trunk | drum is obtained by the embossing unit 10 rotating with respect to the can W in the spindle circumferential direction in this state. A predetermined embossing (molding) is applied to 102.

The embossing unit 10 of the present embodiment described above exhibits the following excellent effects when provided in the can manufacturing apparatus 1 that manufactures the bottle can B.
First, a can W (bottle can B), which is a workpiece, is arranged on the spindle axis O of the embossing unit 10 so as to be coaxial. At this time, with respect to the can body (tubular body) 100 of the can W, three or more (three in the example of the present embodiment) machining shaft portions 11 are provided on the outside in the radial direction orthogonal to the spindle axis O. They are arranged around the axis O at intervals.

The three or more machining shaft portions 11 are moved inward in the radial direction perpendicular to the spindle axis O by the radial movement mechanism 40 while being synchronized with each other. As a result, the three or more processing shaft portions 11 are brought into contact with the outer peripheral surface of the can body 100 substantially simultaneously so as to support the can body 100 from the periphery. In the example of the present embodiment, the three processing shaft portions 11 function as a three-claw chuck and grip the can body 100 from the outside in the radial direction.
Of these processed shaft portions 11, at least one processed shaft portion 11 is provided with an embossed portion (molded portion) 12A. In the example of the present embodiment, an embossing portion 12A is provided in one processing shaft portion (predetermined processing shaft portion) 11 among the three processing shaft portions 11, and two processing shaft portions (predetermined processing shaft portions 11). The processing support portion 12 is provided on the other processing shaft portion 11), and the embossing portion 12 A and the processing support portion 12 abut against the body portion 102 of the can body 100.

  The three or more machining shaft portions 11 that are in contact with the can body 100 are rotated (revolved) around the spindle axis O by the revolution mechanism 41 in synchronization with each other. That is, the three or more machining shaft portions 11 rotate and move around the spindle axis O while maintaining a certain interval around the spindle axis O. At this time, the three or more machining shaft portions 11 are rotated (rotated) around the center axis of each machining shaft portion 11 by the rotation mechanism 42 while being synchronized with each other, and roll on the can body 100. As a result, the can body 100 is subjected to predetermined embossing (molding) over the entire circumference or partially in the circumferential direction.

  As described above, according to the present embodiment, the can body 100 is supported by the embossed portion 12A of the processing shaft portion 11 while the can body 100 is stably supported from the outside in the radial direction by the three or more processing shaft portions 11. 100 can be embossed. That is, in this embodiment, when the embossing part 12A provided in the predetermined processing shaft part 11 presses the can body 100 toward the inner side in the radial direction to perform the embossing, the parts other than the predetermined processing shaft part 11 are used. Since the other processing shaft portion 11 supports the can body 100 inward in the radial direction so as to receive the pressing force by the embossing portion 12A, a core as provided in a conventional embossing unit is not required. .

  That is, the three or more processing shaft portions 11 are applied to the can body 100 from the outside in the radial direction so that the pressing forces are balanced so that the can body 100 is stably held and embossed. Since it is processed, a core for applying a pressing force from the inside of the can body 100 so as to balance the pressing force of the outer core as in a conventional embossing unit is unnecessary.

As described above, according to the present embodiment, the can body 100, regardless of the shape of a portion of the can body 100 other than the predetermined portion (the body portion 102 in the example of the present embodiment) that is embossed along the can axis direction. 100 predetermined parts can be embossed. Accordingly, even after the can W is subjected to bottle necking processing (even after the neck portion 104 and the mouth portion 103 are formed), the can body 100 can be embossed.
That is, the embossing unit 10 can emboss the can body 100 without inserting a core into the can body (tubular body) 100.

  Further, in the present embodiment, there are provided fulcrum shaft portions 13 that are arranged around the spindle axis O at intervals and are provided in the same number as the machining shaft portions 11, and the radial movement mechanism 40 includes the machining shaft portions 11. Since it rotates around the central axis of the fulcrum shaft part 13 and moves toward the inside in the spindle radial direction, the following effects are obtained.

That is, in this case, since the machining shaft portion 11 can move inward in the spindle radial direction by rotating around the fulcrum shaft portion 13, the machining shaft portion 11 is directed inward in the spindle radial direction of the machining shaft portion 11. The movement (approaching movement to the can body 100) is smooth and stable.
Accordingly, the three or more machining shaft portions 11 can be brought into contact with the can body 100 stably and surely, and the above-described operational effects become more remarkable.

  In the present embodiment, the block 14 in which the machining shaft portion 11 and the fulcrum shaft portion 13 are disposed, and the housing that rotates around the spindle shaft O and to which the fulcrum shaft portion 13 is fixed (the second housing 22 and the third housing). 23), and since the revolution mechanism 41 includes the block 14 and the housing, the following effects can be obtained.

  That is, in this case, by rotating the housing around the spindle axis O, the fulcrum shaft portion 13 fixed to the housing, and the machining shaft portion 11 disposed in the block 14 together with the fulcrum shaft portion 13 are Rotated (revolved) around O. That is, with a simple structure, the three or more machining shaft portions 11 can be rotated around the spindle axis O in synchronization with each other.

  In the present embodiment, the first gear 31 provided on the spindle shaft portion 15, the second gear 32 provided on the fulcrum shaft portion 13, and the third gear 33 provided on the machining shaft portion 11 mesh with each other. Since the gear mechanism is provided and the rotation mechanism 42 includes the gear mechanism, the following effects can be obtained.

  That is, in this case, the first gear 31 of the spindle shaft portion 15 and the second gear 32 of the fulcrum shaft portion 13 are engaged with each other, and the second gear 32 of the fulcrum shaft portion 13 and the third gear of the machining shaft portion 11 are engaged. 33 is engaged, the rotation (spinning) of the third gear 33 of the processing shaft portion 11 when the processing shaft portion 11 rolls on the can body 100 causes the first gear 31 and the second gear to rotate. Synchronize with the rotation (spinning) of the third gear 33 of the other machining shaft portion 11 via 32. Therefore, three or more machining shaft portions 11 can be rotated around the central axis of each machining shaft portion 11 in synchronization with each other with a simple structure.

More specifically, the machining shaft portion 11 provided with the third gear 33 rotates relatively around the spindle shaft O around the first gear 31 via the second gear 32, and the machining shaft portion 11. It also rotates (rotates) around the center axis of the. Such rotation of the machining shaft portion 11 is performed stably and accurately in synchronization with each other between the three or more machining shaft portions 11.
That is, according to the above configuration, it is possible to roll the three or more machining shaft portions 11 on the can body 100 while synchronizing with each other with a simple structure.

In the present embodiment, a pressing means 17 that presses the machining shaft portion 11 toward the inner side in the spindle radial direction and an urging means 16 that biases the machining shaft portion 11 toward the outer side in the spindle radial direction are provided. In addition, since the radial movement mechanism 40 includes the pressing means 17, the following operational effects can be obtained.
That is, in this case, since the pressing means 17 presses the processing shaft portion 11 toward the inside in the spindle radial direction, the can body 100 can be stably embossed by this pressing force. Further, since the biasing means 16 biases the machining shaft portion 11 toward the outside in the spindle radial direction, the machining shaft portion 11 after embossing the can body 100 has a complicated structure. And can be easily returned to the arrangement state before embossing (initial state, normal state other than during embossing).

  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.

  For example, in the above-described embodiment, it has been described that the embossing unit 10 is provided with the same number of fulcrum shaft portions 13 and blocks 14 as the processing shaft portions 11, but is not limited thereto. That is, according to the present invention, the radial movement mechanism 40, the revolution mechanism 41, and the rotation mechanism 42 allow the three or more machining shaft portions 11 to move inward in the spindle radial direction in synchronization with each other. Any structure other than the structure described in the above embodiment may be used as long as the structure can be realized as long as the structure can be rotated. Good. That is, the radial movement mechanism 40, the revolution mechanism 41, and the rotation mechanism 42 are not limited to those described in the above-described embodiment. In this case, for example, the fulcrum shaft portion 13 and the block 14 may not be provided.

In the above-described embodiment, an example in which three embossing units 10 are provided with three machining shaft portions 11 has been described. However, four or more machining shaft portions 11 may be provided.
Further, as the three machining shaft portions 11, one predetermined machining shaft portion 11 provided with an embossing portion 12A, and another machining shaft portion provided with a machining support portion 12 (processing shafts other than the predetermined machining shaft portion 11). Part) 11 is provided, and one embossing part 12A rolls on the can body 100, so that a predetermined embossing is performed over the entire circumference of the can body 100 or partially in the circumferential direction. However, the present invention is not limited to this. That is, a plurality (two or more) of the embossed portions 12A may be provided.
Specifically, each of the plurality of machining shaft portions 11 may be provided with an embossing portion 12A, or a plurality of machining shaft portions 11 may be provided along the central axis direction of the machining shaft portion 11. An embossed portion 12A may be provided. When a plurality of embossed portions 12A are provided in this way, it is possible to respond more flexibly to various requests for embossing applied to the can body 100.
Further, the embossing portions 12A and the processing support portions 12 of the plurality of processing shaft portions 11 may be arranged at different positions along the spindle axis O direction. However, as described in the above-described embodiment, when the embossing portions 12A and the processing support portions 12 of the plurality of processing shaft portions 11 are arranged at the same position along the spindle axis O direction, embossing is performed. It is preferable because it is more stable.

  In the above-described embodiment, as the rotation mechanism 42, the first gear 31 provided in the spindle shaft portion 15, the second gear 32 provided in the fulcrum shaft portion 13, and the first gear 31 provided in the machining shaft portion 11. A gear mechanism that meshes with the three gears 33 is provided, and the three or more machining shaft portions 11 are synchronously rotated (spinned) with each other by the gear mechanism. However, the present invention is not limited to this. . That is, three or more machining shaft portions 11 may be rotated synchronously with each other by a structure other than the gear mechanism (for example, a timing belt, a cam mechanism, or the like).

  Moreover, although the above-mentioned embodiment demonstrated the case where the embossing unit 10 was used for the can manufacturing apparatus 1 which manufactures the bottle can B, it is not limited to this, You may use for another apparatus. . Even when the embossing unit 10 is used in an apparatus other than the can manufacturing apparatus 1, the cylindrical body is inserted into the cylindrical body without inserting a core into various cylindrical bodies serving as workpieces. Can be embossed with the same effects as described above.

  In the above-described embodiment, the embossing unit 10 is described as an example of the molding unit. However, molding units other than the embossing unit 10 are also included in the present invention. That is, the molding unit of the present invention includes a processing unit (processing tool) that performs various molding processes on the can body (tubular body) 100 such as a bead processing unit and a remodeling unit. Specifically, for example, in the case of a bead processing unit, a bead processing unit (forming processing unit) is used instead of the embossing unit 12A of the processing shaft unit 11 described above. In the case of a remodeling unit, a remodeling unit (molding unit) is used instead of the embossing unit 12A of the processing shaft 11 described above.

  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 molding unit of the present invention, for example, a cylindrical body such as a can body can be molded without inserting a core into the cylindrical body. is there. For this reason, when this molding processing unit is provided in a can manufacturing apparatus for manufacturing bottle cans, even after bottle canning has been performed on the can, the can body can be embossed, beaded, reformed, etc. Various molding processes can be performed. Therefore, it has industrial applicability.

10 Embossing unit (molding unit)
11 Machining shaft 12A Embossing part (Molding part)
13 fulcrum shaft 14 block 15 spindle shaft 16 urging means (return means)
17 Pressing means 22 Second housing (housing)
23 Third housing (housing)
31 1st gear 32 2nd gear 33 3rd gear 40 Radial direction movement mechanism 41 Revolution mechanism 42 Rotation mechanism O Spindle shaft

Claims (5)

Three or more machining shafts arranged at intervals around the spindle axis;
Of the three or more machining shaft portions, at least one molding processing portion provided on the machining shaft portion;
A radial movement mechanism that moves the three or more machining shaft portions inward in a radial direction orthogonal to the spindle axis in synchronization with each other;
A revolving mechanism for rotating the three or more machining shaft portions around the spindle shaft in synchronization with each other;
A molding processing unit comprising: a rotation mechanism configured to rotate the three or more processing shaft portions around a central axis of each processing shaft portion in synchronization with each other. The molding unit according to claim 1,
There are fulcrum shaft portions arranged around the spindle shaft and spaced apart from each other, and provided in the same number as the machining shaft portion,
The said radial direction movement mechanism rotates the said process axial part around the center axis | shaft of the said fulcrum axis | shaft part, and moves it to the inner side of the said radial direction, The shaping | molding process unit characterized by the above-mentioned. The molding unit according to claim 2,
A block in which the machining shaft and the fulcrum shaft are disposed;
A housing that rotates about the spindle axis and to which the fulcrum shaft is fixed,
The revolving mechanism includes the block and the housing. The molding unit according to claim 2 or 3,
A first gear provided on a spindle shaft portion extending on the spindle shaft;
A second gear provided on the fulcrum shaft and meshing with the first gear;
A third gear provided on the machining shaft and meshing with the second gear;
The rotation processing mechanism includes the first gear, the second gear, and the third gear. The molding unit according to any one of claims 1 to 4,
A pressing means for pressing the machining shaft portion toward the inside in the radial direction perpendicular to the spindle shaft;
Urging means for urging the machining shaft portion toward the outer side in the radial direction,
The said radial direction moving mechanism contains the said press means, The shaping | molding process unit characterized by the above-mentioned.

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