JP2023101964A - Tool holder and apparatus for manufacturing can - Google Patents

Abstract

To provide a tool holder and an apparatus for manufacturing cans which can secure a large processing stroke of a processing tool largely without increasing a table stroke of a processing table.SOLUTION: A tool holder 6 which holds a processing tool 30 for processing a cylindrical body and is attached to a processing table 2 includes a holding member 31 which extends in an axial direction while centering a center axis C and holds the processing tool 30 onto an end part of one side in the axial direction, a holder main body 32 which is attached to the processing table 2, forms a cylindrical shape that is elongated in the axial direction and inserts the holding member 31 to an inner part, and a stroke mechanism 35 which reciprocates the holding member 31 in the axial direction with respect to the holding main body 32.SELECTED DRAWING: Figure 6

Description

The present invention relates to tool holders and can making equipment.

Conventionally, for example, a can manufacturing apparatus described in Patent Document 1 below is known. A can manufacturing apparatus includes a holding table, a processing table, a table indexing mechanism, and a crank mechanism. The holding table holds a plurality of cylindrical bodies (workpieces) and is intermittently rotated around the table axis. The processing table has a processing tool for processing the cylindrical body, is arranged to face the holding table in the axial direction of the table, and is reciprocally moved in the axial direction of the table. The table index mechanism intermittently rotates the holding table around the table axis with respect to the processing table. The crank mechanism reciprocates the processing table relative to the holding table in the axial direction of the table.

The holding table holds a plurality of bottomed cylindrical works such as DI cans arranged around the table axis. The tubular body is held on the holding table with its open end directed toward the processing table.
The machining table is provided with a plurality of machining tools for machining the tubular body arranged around the table axis. The multiple machining tools include multiple die machining tools and multiple rotary machining tools. Each die processing tool performs a drawing process for reducing the diameter of the peripheral wall of the cylindrical body, a diameter expanding process for expanding the peripheral wall, and the like. Each rotary processing tool performs rotary processing such as trimming, thread forming, curling, and throttle (curl crushing) processing on the peripheral wall of the cylindrical body.

The holding table and the processing table are repeatedly moved toward and away from each other in the axial direction of the table by the crank mechanism, and intermittently rotated relative to each other about the table axis by the table index mechanism. Specifically, the processing table moves toward and away from the holding table in the axial direction of the table, and during one stroke (reciprocating movement) between these approaches and separations, the holding table rotates about the table axis by a predetermined amount relative to the processing table.

Then, each time the tables move toward or away from each other by one stroke, the cylindrical body is subjected to predetermined processing by the processing tool, and the cylindrical body is moved to the next processing position by the processing tool.
By repeating this operation, the cylindrical body held by the holding table is sequentially processed by a plurality of processing tools provided on the processing table, and when processing by all the processing tools is completed, a can having a predetermined shape (bottle can, aerosol can, etc.) is obtained.

JP 2019-58945 A

In this type of can manufacturing apparatus, the amount of reciprocating movement of the processing table in the axial direction of the table (hereinafter referred to as table stroke) is reduced to shorten the molding time and improve production efficiency.
However, due to the reduced table stroke, the stroke of machining the cylindrical body by the machining tool (hereinafter referred to as the machining stroke) is also kept small, and for example, predetermined machining such as molding of the barrel of the cylindrical body (especially machining with a large stroke) may not be possible. In order to secure a large working stroke, the table stroke must be increased, which requires a large-scale structural change of the can manufacturing apparatus, and also lowers the production efficiency.

SUMMARY OF THE INVENTION An object of the present invention is to provide a tool holder and a can manufacturing apparatus capable of securing a large machining stroke of a machining tool without increasing the table stroke of the machining table.

One aspect of the present invention is a tool holder that holds a processing tool for processing a cylindrical body and is attached to a processing table, and includes a holding member that extends in the axial direction around a central axis and holds the processing tool at one end in the axial direction; a holder body that is attached to the processing table and has a cylindrical shape that extends in the axial direction;
According to another aspect of the can manufacturing apparatus of the present invention, there is provided a holding table that holds a cylindrical body and is intermittently rotated about a table axis, and a processing table that is reciprocally moved in the axial direction of the table with respect to the holding table. The processing table is fitted with the above-described tool holder that holds a processing tool for processing the cylindrical body. , the stroke mechanism moves the holding member to the other side in the axial direction opposite to the cylindrical body.

In the tool holder and can manufacturing apparatus of the present invention, the processing tool is attached to the processing table via the tool holder. The tool holder uses a stroke mechanism to reciprocate the holding member and the processing tool in the axial direction with respect to the holder main body in accordance with the reciprocating movement of the processing table in the axial direction of the table.

Specifically, the stroke mechanism moves (extends) the holding member and the processing tool in one axial direction toward the cylindrical body in accordance with the movement of the processing table to approach the holding table, thereby increasing the stroke of processing the cylindrical body by the processing tool. In addition, the stroke mechanism moves (contracts) the holding member and the processing tool to the other side in the axial direction opposite to the cylindrical body in accordance with the movement of the processing table away from the holding table, thereby suppressing the processing tool from interfering with the cylindrical body or the like during intermittent rotation of the holding table.

For this reason, among a plurality of processing tools for performing various types of processing on a cylindrical body, by holding a predetermined processing tool that requires a large processing stroke with the telescopic tool holder of the present invention, for example, it is possible to perform processing that could not be performed with a conventional small table stroke, such as molding the body of a cylindrical body.

As described above, according to the present invention, a large machining stroke of the machining tool can be ensured without increasing the table stroke of the machining table. As a result, it is possible to shorten the molding time of the cylindrical body and improve the production efficiency, while performing various molding processes on the cylindrical body.

In the tool holder, the stroke mechanism has a first stroke mechanism for moving the holding member toward the tubular body relative to the holder main body in the axial direction. The first stroke mechanism includes a cylinder chamber provided in the holder main body and extending in the axial direction; a piston provided in the holding member and arranged in the cylinder chamber; It is preferable to have an air outlet for

In this case, the first stroke mechanism pushes the piston to one side in the axial direction by the pressure of air supplied to the cylinder chamber (hereinafter referred to as air pressure), thereby moving the holding member and the processing tool to the one side in the axial direction toward the cylindrical body. Conventional can manufacturing apparatuses have used, for example, an air mechanism for holding a tubular body with a chuck, an air mechanism for supplying air into the tubular body during molding by a processing tool, and the like. Compared to the case where an electric actuator or the like is used as the first stroke mechanism, the use of air pressure as in the present invention does not require a large-scale structural change of the device, and it is also easy to supply and stop the air supply in mechanical synchronization with the reciprocating movement of the processing table. Therefore, air can be supplied to the cylinder chamber at appropriate timing.

In the tool holder, the first stroke mechanism may have a plurality of sets of the cylinder chamber, the piston, the air supply port and the air discharge port.

In this case, the thrust that pushes the piston toward one side in the axial direction by the air pressure is doubled according to the number of the sets. For this reason, for example, molding of a cylindrical body that requires a large thrust force can be performed. Moreover, even when the air pressure supplied to the cylinder chamber is low, a large thrust force can be stably applied to the holding member and the processing tool.

In the tool holder, it is preferable that the stroke mechanism has a second stroke mechanism that moves the holding member to the other side in the axial direction opposite to the cylindrical body with respect to the holder body, the second stroke mechanism has a biasing member that biases the holding member toward the other side in the axial direction with respect to the holder body, and the biasing force that the biasing member biases the holding member to the other side in the axial direction is smaller than the air pressure that the first stroke mechanism pushes the holding member to the one side in the axial direction.

In this case, when air is supplied to the cylinder chamber, the holding member moves to one side in the axial direction due to the air pressure, and when the supply of air to the cylinder chamber is stopped, the holding member moves to the other side in the axial direction due to the biasing force of the biasing member. Therefore, the holding member and the processing tool can be stably reciprocated in the axial direction at appropriate timing.

Preferably, the tool holder includes a sliding member provided between the holding member and the holder body for sliding them in the axial direction, one of the holding member and the holder body having a groove extending in the axial direction, the other of the holding member and the holder body having a detent portion inserted into the groove, the detent portion having a lubricant supply port for supplying a lubricant to the groove, and lubricant supplied from the lubricant supply port reaching the sliding member via the groove.

In this case, the anti-rotation portion and the groove restrict the relative rotation of the holder body and the holding member about the central axis, thereby stabilizing the machining accuracy of the cylindrical body by the machining tool. Moreover, since the lubricant can be supplied to the sliding member through the groove from the lubricant supply port of the detent portion, the function of the sliding member can be favorably maintained while the tool holder can be made compact.

According to the tool holder and the can manufacturing apparatus of the aspect of the present invention, a large working stroke of the working tool can be ensured without increasing the table stroke of the working table.

FIG. 1 is a side view showing a schematic configuration of a can manufacturing apparatus according to this embodiment. FIG. 2 is a diagram showing a section II-II of FIG. FIG. 3 is a perspective view showing the tool holder of this embodiment. FIG. 4 is a perspective view showing the tool holder of this embodiment. FIG. 5 is a plan view showing the tool holder of this embodiment. 6 is a sectional view showing a VI-VI section of FIG. 5. FIG. FIG. 7 is a perspective view showing a tool holder of a modified example of this embodiment. FIG. 8 is a perspective view showing a tool holder of a modified example of this embodiment. FIG. 9 is a plan view showing a tool holder of a modified example of this embodiment. 10 is a cross-sectional view showing the X-X section of FIG. 9. FIG.

A can manufacturing apparatus 1 and a tool holder 6 according to one embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the can manufacturing apparatus 1 of the present embodiment is a so-called bottle necker (bottle can manufacturing apparatus) that manufactures bottle cans (product cans) P having a predetermined shape by subjecting a bottomed cylindrical cylindrical body (intermediate molded can) W, which is a work, to a plurality of types of molding processes including die processing and rotary processing.

A tubular body W supplied as a work to the can manufacturing apparatus 1 is a DI can that has been subjected to DI (Drawing & Ironing) processing, printing, painting, etc. in previous processes. A DI can is formed into a cylindrical shape with a bottom by subjecting a disk-shaped blank punched from an aluminum alloy plate to a cupping process (drawing process), a DI process (draw-ironing process), a trimming process, a printing process, a painting process, and the like.

The cylindrical body W includes a cylindrical peripheral wall (can body) and a generally disk-shaped bottom wall (can bottom). In this embodiment, the central axis of the tubular body W is called a can axis. In the can manufacturing apparatus 1, the cylindrical body W is subjected to bottlenecking to form a mouthpiece and a shoulder. The mouthpiece is positioned at the open end of the peripheral wall and is the smallest diameter portion of the peripheral wall. The shoulder portion is disposed between the body, which is the largest diameter portion of the peripheral wall, and the mouthpiece, and has a tapered shape that gradually decreases in diameter from the body toward the mouthpiece along the can axial direction of the tubular body W.
The bottle-shaped can P produced by processing the tubular body W by the can-manufacturing apparatus 1 is filled with a content such as a beverage in a post-process, and a cap is screwed onto the mouthpiece to seal the bottle-shaped can P.

The can manufacturing apparatus 1 includes an apparatus body 4, a holding table 3, a processing table 2, a shaft portion 5, a crank mechanism 8, a table indexing mechanism 9, a drive motor 11, a supply wheel 10, a discharge wheel 14, a wheel indexing mechanism 15, and conveying means 12. The processing table 2 and the holding table 3 have respective table axes TA, which are central axes, extending in the horizontal direction, and these table axes TA are arranged coaxially with each other.

In this embodiment, the direction in which the table axis TA extends is called the table axis direction. In each figure, the table axis direction corresponds to the X-axis direction. Of the table axial directions, the direction from the processing table 2 to the holding table 3 (+X side) is called one side of the table axial direction, and the direction from the holding table 3 to the processing table 2 (−X side) is called the other side of the table axial direction. In addition, the table axial direction may be rephrased as the front-rear direction. In this case, one side (+X side) in the table axial direction corresponds to the rear side, and the other side (−X side) in the table axial direction corresponds to the front side.
A direction orthogonal to the table axis TA is called a table radial direction. In the radial direction of the table, the direction closer to the table axis TA is called the inner side in the table radial direction, and the direction away from the table axis TA is called the outer side in the table radial direction.
The direction of rotation around the table axis TA is called the table circumferential direction.

The device body 4 supports the holding table 3 , the processing table 2 , the shaft portion 5 , the crank mechanism 8 , the table indexing mechanism 9 , the drive motor 11 , the supply wheel 10 , the discharge wheel 14 and the wheel indexing mechanism 15 . The conveying means 12 extends outside the apparatus main body 4 .

Although not shown in detail, the apparatus body 4 has, for example, a base, a frame attached to the base, and an exterior member covering the base and the frame. The base is installed on the floor of a facility such as a factory. The frame is fixed to the base. The exterior member is a housing or the like. A part of the exterior member is an openable and closable door, which is opened and closed during maintenance and the like.

The holding table 3 is called, for example, a turntable or an index table. The holding table 3 has a circular annular shape. The holding table 3 is a hollow plate-like table with a large diameter. The radius of the holding table 3 is, for example, 650 mm or more. A plurality of chucks 7 are arranged along the table circumferential direction on the outer peripheral portion of the surface of the holding table 3 facing the other side (front side) in the axial direction of the table. That is, the holding table 3 has a plurality of chucks 7 arranged in the outer peripheral portion of the holding table 3 and arranged in the table circumferential direction. Each chuck 7 holds the bottom portion of the cylindrical body W, respectively. The cylindrical body W held by the chuck 7 has its open end opened on the other side in the table axial direction and faces the processing table 2 . The holding table 3 is intermittently rotated in the table circumferential direction by a table index mechanism 9 . That is, the holding table 3 holds a plurality of cylindrical bodies W and is intermittently rotated around the table axis TA.

In this embodiment, of the table circumferential direction, the direction in which the holding table 3 is intermittently rotated with respect to the processing table 2 is called the holding table rotation direction R1, and the rotation direction opposite to this is called the side opposite to the holding table rotation direction R1 or the opposite side of the holding table rotation direction.
The rotation direction R1 of the holding table is the same as the direction in which a plurality of processing tools 30, which are provided on the processing table 2 and will be described later, are arranged in the circumferential direction of the table in the order of processing the cylindrical body W. As shown in FIG. Therefore, the holding table rotation direction R1 can be rephrased as the downstream side (or simply the processing forward direction) of the processing order of the cylindrical body W, and the side opposite to the holding table rotation direction R1 can be rephrased as the upstream side of the processing order of the cylindrical body W.

The processing table 2 is called a die table, for example. The processing table 2 has a disk-like or circular annular shape. The diameter (outer diameter) of the processing table 2 is substantially the same as the diameter of the holding table 3 . The processing table 2 is supported by the device main body 4 via the shaft portion 5 . The shaft portion 5 extends through the holding table 3 in the axial direction of the table. The shaft portion 5 is fixed to the processing table 2 and extends on the table axis TA. The shaft portion 5 is movable with respect to the holding table 3 in the axial direction of the table. The shaft portion 5 is supported by the device main body 4 so as to be slidable in the axial direction of the table.

The processing table 2 is arranged to face the holding table 3 from the other side in the table axial direction. The machining table 2 is reciprocated in the table axial direction with respect to the holding table 3 by a crank mechanism 8 . The processing table 2 has a processing tool 30 for processing the cylindrical body W (see FIGS. 3 and 4) and a tool holder 6 that holds the processing tool 30 . That is, a tool holder 6 for holding a processing tool 30 is attached to (a table body of) the processing table 2 .

A plurality of sets of processing tools 30 and tool holders 6 are provided on the processing table 2 . The plurality of tool holders 6 include fixed type tool holders (detailed illustration is omitted) and telescopic type tool holders 6 of the present embodiment. The fixed type and telescopic type tool holders 6 are arranged side by side in the table circumferential direction on the outer peripheral portion of the processing table 2 . Specifically, the plurality of tool holders 6 are arranged along the table circumferential direction on the outer peripheral portion of the processing table 2, and are arranged to face the plurality of cylindrical bodies W held by the holding table 3 from the other side in the table axial direction.

As shown in FIG. 1, the central axis C of each tool holder 6 extends parallel to the table axis TA. In this embodiment, the direction in which the central axis C of the tool holder 6 extends is called the axial direction. The axial direction is the same as the table axial direction and corresponds to the X-axis direction in each figure. In this embodiment, the one side in the axial direction corresponds to one side (+X side) in the axial direction of the table, and the other side in the axial direction corresponds to the other side (−X side) in the axial direction of the table. Note that the axial direction may also be called the holder axial direction, the tool axial direction, or the like.
A direction perpendicular to the central axis C is called a radial direction. Of the radial directions, the direction closer to the central axis C is called the radial inner side, and the direction away from the central axis C is called the radial outer side.
The direction of rotation around the central axis C is called the circumferential direction.

The central axis C of the tool holder 6, the processing tool 30 held by the tool holder 6, and the can axis of the cylindrical body W facing the processing tool 30 (corresponding to the central axis of the chuck 7) are arranged coaxially with each other. Note that the processing tool 30 does not have to be arranged coaxially with the central axis C depending on the type of the processing tool 30 . With the can axis of the tubular body W and the central axis C of the tool holder 6 aligned, the tubular body W is machined by the machining tool 30 supported by the tool holder 6 . A plurality of tool holders 6 each support processing tools 30 of different types, sizes, and the like. Each processing tool 30 of the plurality of tool holders 6 faces each cylindrical body W from the other side in the table axial direction.

As shown in FIG. 6, the processing table 2 has a mounting hole 2a penetrating the processing table 2 in the table axial direction (X-axis direction). A plurality of mounting holes 2 a are provided on the outer peripheral portion of the processing table 2 so as to be arranged in the table circumferential direction. A plurality of tool holders 6 holding a plurality of types of processing tools 30 are arranged in the order of processing to the cylindrical body W along the holding table rotation direction R1 and are attached to the respective attachment holes 2a.

The plurality of machining tools 30 includes die machining tools and rotary machining tools. In this embodiment, a plurality of tool holders 6 for holding die machining tools and a plurality of tool holders 6 for holding rotary machining tools are detachably provided in the plurality of mounting holes 2a of the machining table 2 in the order of machining the cylindrical body W. In addition, one or more of the plurality of mounting holes 2a may be an empty space (that is, unused) where the tool holder 6 is not mounted. Also, one or more of the plurality of tool holders 6 may hold an oiling tool as the processing tool 30 . The oiling tool applies oil to the part of the cylindrical body W to be processed.

The die processing tool moves in the axial direction (the direction in which the can axis extends) relative to the cylindrical body W, and performs die processing such as drawing to reduce the diameter of the peripheral wall (can body) of the cylindrical body W and diameter expansion to increase the diameter of the peripheral wall. One type (predetermined) of die processing is applied to the cylindrical body W by one die processing tool. Examples of the die processing tool include molding tools such as a diameter-reducing mold and a diameter-expanding mold described in Patent Document 1 (Japanese Patent Application Laid-Open No. 2019-58945).

The rotary processing tool performs rotary processing such as trimming, thread forming, curling, and throttle (curl crushing) processing on the peripheral wall of the cylindrical body W by rotating the cylindrical body W in the circumferential direction (around the can axis). One type of (predetermined) rotary machining is applied to the cylindrical body W by one rotary machining tool.
A detailed configuration of the tool holder 6 will be described separately later.

As shown in FIG. 1, the crank mechanism 8 reciprocates the processing table 2 with respect to the holding table 3 in the axial direction of the table. The crank mechanism 8 has a drive shaft 16 to which rotation (rotational driving force) from the drive motor 11 is input, a crank shaft 17 that is connected to the drive shaft 16 and is rotated around the axis O of the drive shaft 16 as the drive shaft 16 rotates, and a connecting rod 18 that connects the crank shaft 17 and the shaft portion 5. That is, the machining table 2 and the crankshaft 17 are connected via the connecting rod 18 and the shaft portion 5 . The crankshaft 17 rotates around the axis O of the drive shaft 16 at a constant angular velocity. The crank mechanism 8 converts the rotary motion about the axis O of the drive shaft 16 input from the drive motor 11 to the drive shaft 16 into linear motion in the axial direction of the table and outputs the linear motion to the shaft portion 5 .
The drive motor 11 is, for example, an inverter motor or the like.

The table index mechanism 9 rotates and stops (intermittently rotates) the holding table 3 in the table circumferential direction for each stroke of the reciprocating movement of the processing table 2 along the table axis direction. The table index mechanism 9 intermittently rotates the holding table 3 about the table axis TA with respect to the processing table 2 according to the crank angle about the drive shaft 16 of the crank mechanism 8 .

That is, the holding table 3 and the processing table 2 are repeatedly moved toward and away from each other in the axial direction of the table by the crank mechanism 8, and intermittently rotated relative to each other in the circumferential direction of the table by the table index mechanism 9. Specifically, the processing table 2 moves toward and away from the holding table 3 in the axial direction of the table, and during one stroke (reciprocating movement) between these approaches and separations, the holding table 3 rotates (intermittently rotates) relative to the processing table 2 by a predetermined amount in the table circumferential direction.

Then, for each stroke in which the machining table 2 and the holding table 3 approach and separate, the cylindrical body W held by the chuck 7 of the holding table 3 is subjected to a predetermined machining by the machining tools 30 of the respective tool holders 6 of the machining table 2, and the holding table 3 moves the tubular body W downstream in the machining order (rotational direction R1 of the holding table) to the machining position by the next (different) machining tool 30.
By repeating this operation, the cylindrical body W held by the holding table 3 is sequentially processed by a plurality of processing tools 30 provided on the processing table 2, and when the processing by all the processing tools 30 is completed, a bottle can P having a predetermined shape is obtained.

As shown in FIG. 2 , the feed wheel 10 feeds the tubular body W to the holding table 3 . The supply wheel 10 is called an infeed wheel and has a substantially cylindrical shape. The supply wheel 10 receives the tubular body W supplied to the shooter 13 from the outside (pre-process) of the can manufacturing apparatus 1 and transfers the tubular body W to the holding table 3 . The supply wheel 10 is supported by the apparatus main body 4 with the wheel axis SA as its central axis extending parallel to the table axis TA. The supply wheel 10 is rotated in the wheel rotation direction R2 about the wheel axis SA.

The discharge wheel 14 discharges the processed cylindrical body W (bottle can P) from the holding table 3 . The discharge wheel 14 is called a discharge wheel and has a substantially cylindrical shape. The discharge wheel 14 receives the cylindrical body W (bottle can P) processed by the can manufacturing apparatus 1 from the holding table 3 and delivers (discharges) it to the conveying means 12 . The conveying means 12 conveys the bottle-can P toward the outside (post-process) of the can manufacturing apparatus 1 . The discharge wheel 14 is supported by the apparatus main body 4 with the wheel axis DA as its central axis extending parallel to the table axis TA. The discharge wheel 14 is rotated in the wheel rotation direction R3 about the wheel axis DA.

A plurality of concave pockets 23 capable of holding the peripheral wall of the tubular body W are provided on the outer periphery of the supply wheel 10 at equal intervals in the wheel circumferential direction around the wheel axis SA. A plurality of recessed pockets 24 capable of holding the peripheral wall of the cylindrical body W (bottle can P) are provided on the outer periphery of the discharge wheel 14 at equal intervals in the wheel circumferential direction around the wheel axis DA. 2, illustration of the respective pockets 23 and 24 is partially omitted.

These pockets 23 and 24 are formed in concave curved surfaces having concave arc-shaped cross sections perpendicular to the wheel axes SA and DA corresponding to the cylindrical peripheral wall of the tubular body W. As shown in FIG. In addition, suction holes communicating with an air suction source (not shown) are opened in the inner surfaces of the pockets 23 and 24 . The pockets 23 and 24 can hold the cylindrical body W by the air suction force of the air suction source acting on the peripheral wall of the cylindrical body W through the suction holes.

The wheel index mechanism 15 intermittently rotates the supply wheel 10 and the discharge wheel 14 about the respective wheel axes SA and DA in synchronization with the intermittent rotation of the holding table 3 about the table axis TA. That is, the supply wheel 10 intermittently rotates around the wheel axis SA in synchronization with the intermittent rotation of the holding table 3 around the table axis TA. The discharge wheel 14 intermittently rotates around the wheel axis DA in synchronization with the intermittent rotation of the holding table 3 around the table axis TA. The wheel index mechanism 15 has a cam structure. The wheel index mechanism 15 rotates and stops rotating (intermittently rotates) the supply wheel 10 about the wheel axis SA, and rotates and stops rotating (intermittently rotates) the discharge wheel 14 about the wheel axis DA, for each stroke of the reciprocating movement of the processing table 2.

Specifically, the supply wheel 10 and the discharge wheel 14 are intermittently rotated by the wheel index mechanism 15 in wheel rotation directions R2 and R3 (each clockwise in the example of FIG. 2), which are opposite to the holding table rotation direction R1 (counterclockwise in the example of FIG. 2).
The supply wheel 10 and the discharge wheel 14 are mechanically connected by, for example, belts, pulleys, gears, joints, etc., and intermittently rotate about the wheel axes SA and DA in synchronization with each other.

More specifically, when the supply wheel 10 rotates intermittently and the tubular body W held in the pocket 23 of the supply wheel 10 is placed at a position (immediately above the chuck 7) overlapping the chuck 7 of the holding table 3 when viewed in the axial direction of the table, a pushing portion (not shown) provided in the processing table 2 pushes the tubular body W toward one side in the axial direction of the table (that is, toward the holding table 3 side). Thereby, the cylindrical body W is delivered from the pocket 23 to the chuck 7 and held by the chuck 7 .

In addition, the tubular body 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 machining table 2, and when all the machining is completed and placed at a position (directly below the pocket 24) overlapping the pocket 24 of the discharge wheel 14 when viewed from the table axial direction, the extrusion piston provided in the chuck 7 directs the tubular body W (bottle can P of the product that has undergone all machining) toward the other side in the table axial direction (that is, the discharge wheel 14 side). Push out. As a result, the tubular body W(P) is transferred from the chuck 7 to the pocket 24 and held in the pocket 24 .

The bottle-can P held in the pocket 24 is transferred around the wheel axis DA as the discharge wheel 14 intermittently rotates, is released from the pocket 24 and is transferred to the transfer means 12 .

The drive motor 11, the crank mechanism 8, the table index mechanism 9, and the wheel index mechanism 15 are mechanically connected to each other by gears, belts, joints, or the like so as to be synchronizable. That is, the crank mechanism 8, the table index mechanism 9, and the wheel index mechanism 15 are driven in synchronization with each other by the rotational driving force of the drive motor 11. As shown in FIG.

Next, the tool holder 6 of this embodiment will be described in more detail with reference to FIGS. 3 to 6. FIG. The tool holder 6 shown in FIGS. 3 to 6 is of a telescopic type whose entire length can be extended and retracted in the axial direction.

The tool holder 6 includes a holding member 31 extending axially around the central axis C, a holder body 32 having a cylindrical shape extending axially and into which the holding member 31 is inserted, a sliding member 33 provided between the holding member 31 and the holder body 32 for sliding them in the axial direction, a biasing member 34, and a stroke mechanism 35.

The holder main body 32 is attached to the processing table 2 and fixed to the processing table 2 . The holder main body 32 has a table attachment portion 36 , a cylinder chamber 37 , an air supply port 38 , an air discharge port 39 and a detent portion 40 .

The table mounting portion 36 is arranged on the outer peripheral portion of the holder main body 32 . In the present embodiment, the table mounting portion 36 is arranged on one axial side (+X side) of the holder body 32 . The table mounting portion 36 has a portion that is inserted into the mounting hole 2 a of the processing table 2 . The tool holder 6 is fixed to the processing table 2 via the table attachment portion 36 .

The cylinder chamber 37 is provided inside the holder body 32 . The cylinder chamber 37 is a substantially columnar space extending in the axial direction around the central axis C. As shown in FIG. The cylinder chamber is formed into a sealed chamber using seal members such as O-rings. In this embodiment, the cylinder chamber 37 is arranged in a portion of the holder main body 32 on the other side (−X side) in the axial direction. That is, the cylinder chamber 37 is arranged on the other side in the axial direction of the table mounting portion 36 .

The air supply port 38 communicates the outside of the holder body 32 with the cylinder chamber 37 . The air supply port 38 has a through hole radially penetrating the peripheral wall of the holder body 32 and a joint member attached to the through hole by screwing or the like. A radially outer end portion of the through hole of the air supply port 38 opens to the outer peripheral surface of the peripheral wall of the holder main body 32 . The radially inner end of the through hole of the air supply port 38 opens to the other axial end of the cylinder chamber 37 . Compressed air is supplied to the air supply port 38 from an air supply source (not shown) through a tube, a pipe, or the like. The pressure of the air supplied to the air supply port 38 is, for example, 0.5 MPa.

The air discharge port 39 communicates the outside of the holder body 32 with the cylinder chamber 37 . The air discharge port 39 has a through hole radially penetrating the peripheral wall of the holder body 32 . A radially outer end portion of the through hole of the air discharge port 39 opens to the outer peripheral surface of the peripheral wall of the holder main body 32 . A radially inner end portion of the through hole of the air discharge port 39 opens to an axially one-side end portion of the cylinder chamber 37 .

The anti-rotation portion 40 is attached to the peripheral wall of the holder main body 32 . In this embodiment, the anti-rotation portion 40 is arranged between the table mounting portion 36 and the cylinder chamber 37 in the axial direction. The anti-rotation portion 40 has a fixed portion 41 fixed to the peripheral wall of the holder body 32, a projection 42 projecting radially inward from the inner peripheral surface of the peripheral wall, and a lubricant supply port 43 extending inside the anti-rotation portion 40 and opening into the projection 42.

A lubricant such as grease or oil is supplied to the lubricant supply port 43 via a grease nipple or the like. In this embodiment, the lubricant supply port 43 branches inside the anti-rotation portion 40 and opens at a plurality of locations (three locations in this embodiment) on the outer surface of the projecting portion 42 . One of the plurality of lubricant supply ports 43 opens in a radially inward facing surface of the projection 42 , and the other two open in a pair of circumferentially facing surfaces of the projection 42 .

As shown in FIG. 6, the holding member 31 is provided so as to pass through the holder body 32 in the axial direction. That is, the holding member 31 includes a portion inserted into the holder main body 32 , a portion protruding from the holder main body 32 in one axial direction, and a portion protruding from the holder main body 32 in the other axial direction. The holding member 31 is axially movable with respect to the holder body 32 .

Specifically, the holding member 31 has a shaft 44 , a piston 45 , a groove 46 , a tool holding portion 47 and a pressing flange 48 .
The shaft 44 has an axial shape extending in the axial direction around the central axis C. As shown in FIG. The shaft 44 is inserted inside the holder body 32 and passes through the holder body 32 in the axial direction. That is, the shaft 44 has a portion arranged inside the holder main body 32 , a portion protruding from the holder main body 32 to one axial side, and a portion protruding from the holder main body 32 to the other axial side.

A piston 45 is arranged inside the holder body 32 and fixed to the shaft 44 . The piston 45 has a substantially columnar shape centered on the central axis C. As shown in FIG. A piston 45 is provided in the holding member 31 and arranged in the cylinder chamber 37 . A seal portion 49 provided on the outer peripheral surface of the piston 45 slidably contacts the inner peripheral surface of the cylinder chamber 37 . The seal portion 49 has an annular shape centered on the central axis C. As shown in FIG. The piston 45 slides axially within the cylinder chamber 37 .

As shown in FIGS. 4 and 6 , (the through hole of) the air supply port 38 of the holder body 32 is arranged on the other side of the piston 45 in the axial direction. That is, the air supply port 38 supplies air to a portion of the cylinder chamber 37 located on the other side in the axial direction relative to the piston 45 (see FIG. 10).
The air discharge port 39 of the holder main body 32 is arranged on one side of the piston 45 in the axial direction. That is, the air discharge port 39 discharges air from a portion of the cylinder chamber 37 located on one side of the piston 45 in the axial direction.

Therefore, air is supplied from the air supply port 38 to the cylinder chamber 37 and discharged from the air discharge port 39 , so that the piston 45 moves in the cylinder chamber 37 to one side in the axial direction due to the air pressure.

As shown in FIG. 6, the groove 46 is recessed radially inward from the outer peripheral surface of the shaft 44 and extends axially. Groove 46 is located in the portion of shaft 44 that is located within holder body 32 . In this embodiment, the groove 46 is arranged on one side of the piston 45 in the axial direction. The anti-rotation portion 40 is inserted into the groove 46 . Specifically, the protruding portion 42 of the anti-rotation portion 40 is inserted into the groove 46 from the outside in the radial direction and is movable in the axial direction. A plurality of lubricant supply ports 43 that open to the protruding portion 42 are positioned in the groove 46 . Therefore, the lubricant supply port 43 supplies lubricant to the groove 46 .

The tool holding portion 47 is arranged on one side in the axial direction of the holder main body 32 . The tool holding portion 47 is connected to one axial end of the shaft 44 . The tool holding portion 47 is positioned at one axial end of the holding member 31 . The tool holding portion 47 has a disc shape centered on the central axis C. As shown in FIG. In this embodiment, the tool holding portion 47 has the largest outer diameter in the holding member 31 .

A processing tool 30 is attached to the tool holding portion 47 . The processing tool 30 is fixed to the end surface of the tool holding portion 47 facing one side in the axial direction. That is, the processing tool 30 is held by the tool holding portion 47 and protrudes from the tool holding portion 47 to one side in the axial direction. Thereby, the holding member 31 holds the processing tool 30 at one axial end thereof.

The pressing flange 48 is arranged on the other axial side of the holder body 32 . The pressing flange 48 is connected to the other axial end of the shaft 44 . The presser flange 48 is located at the end of the holding member 31 on the other side in the axial direction. The pressing flange 48 has a disc shape centered on the central axis C. As shown in FIG. The presser flange 48 has a larger outer diameter than the portion of the shaft 44 located on the other axial side of the holder body 32 .

The sliding member 33 is, for example, a sliding bearing or the like. The sliding member 33 has a substantially cylindrical shape centered on the central axis C. As shown in FIG. In this embodiment, the sliding member 33 is fixed to the inner peripheral portion of the holder main body 32 . The inner peripheral surface of the sliding member 33 slides on the outer peripheral surface of the shaft 44 . A plurality of sliding members 33 are provided spaced apart from each other in the axial direction. In this embodiment, a pair of sliding members 33 are provided apart from each other in the axial direction.

Lubricant supplied from the lubricant supply port 43 is configured to reach the sliding member 33 via the groove 46 . At least one of the plurality of sliding members 33 (in this embodiment, the sliding member 33 on the other side in the axial direction) is arranged to face the groove 46 in the radial direction.

The biasing member 34 is a compression coil spring or the like that spirally extends around the central axis C. As shown in FIG. A portion of the shaft 44 that protrudes to the other side in the axial direction from the holder main body 32 is inserted into the biasing member 34 . The biasing member 34 is arranged between the end surface of the holder body 32 facing the other side in the axial direction and the pressing flange 48 . Specifically, the end portion of the biasing member 34 on one side in the axial direction contacts the end surface of the holder main body 32 facing the other side in the axial direction. The end portion of the biasing member 34 on the other side in the axial direction contacts the surface of the pressing flange 48 facing the one side in the axial direction.

The biasing member 34 biases the pressing flange 48 toward the other side in the axial direction with respect to the holder main body 32 . Thereby, the biasing member 34 biases the holding member 31 toward the other side in the axial direction with respect to the holder main body 32 . The biasing force with which the biasing member 34 biases the holding member 31 toward the other side in the axial direction is smaller than the air pressure that pushes the piston 45 toward the one side in the axial direction when air is supplied from the air supply port 38 to the cylinder chamber 37 .

The stroke mechanism 35 axially reciprocates the holding member 31 with respect to the holder body 32 . Specifically, when the processing table 2 moves closer to the holding table 3, the stroke mechanism 35 moves the holding member 31 and the processing tool 30 toward the cylindrical body W in one axial direction. Further, when the processing table 2 moves away from the holding table 3 , the stroke mechanism 35 moves the holding member 31 and the processing tool 30 to the other side in the axial direction opposite to the cylindrical body W.

The stroke mechanism 35 has a first stroke mechanism 50 that moves the holding member 31 and the processing tool 30 toward the cylindrical body W with respect to the holder body 32 in one axial direction, and a second stroke mechanism 51 that moves the holding member 31 and the processing tool 30 with respect to the holder body 32 in the other axial direction opposite to the cylindrical body W.
The first stroke mechanism 50 has the aforementioned cylinder chamber 37 , piston 45 , air supply port 38 and air discharge port 39 . The second stroke mechanism 51 has the biasing member 34 described above.

The biasing force by which the biasing member 34, that is, the second stroke mechanism 51 biases the holding member 31 to the other axial side is smaller than the air pressure by which the first stroke mechanism 50 pushes the holding member 31 to the one axial side. A difference between the air pressure and the biasing force is, for example, 200 kg or more. The difference corresponds to the thrust force with which the tool holder 6 pushes the holding member 31 and the processing tool 30 to one side in the axial direction. In the present embodiment, the thrust force is set to 200 kg or more, so that the cylindrical body W can be formed stably.

In the tool holder 6 and the can manufacturing apparatus 1 of this embodiment described above, the processing tool 30 is attached to the processing table 2 via the tool holder 6 . The tool holder 6 axially reciprocates the holding member 31 and the processing tool 30 with respect to the holder main body 32 in accordance with the axial reciprocation of the processing table 2 by the stroke mechanism 35 .

Specifically, as the processing table 2 moves closer to the holding table 3, the stroke mechanism 35 moves (extends) the holding member 31 and the processing tool 30 in one axial direction toward the cylindrical body W, thereby increasing the stroke of processing the cylindrical body W by the processing tool 30. In addition, in accordance with the movement of the processing table 2 away from the holding table 3, the stroke mechanism 35 moves (contracts) the holding member 31 and the processing tool 30 to the other side in the axial direction opposite to the cylindrical body W, thereby suppressing the processing tool 30 from interfering with the cylindrical body W and the like during intermittent rotation of the holding table 3.

Therefore, by holding a predetermined processing tool 30 for which a large processing stroke is desired among the plurality of processing tools 30 for performing various processing on the cylindrical body W with the telescopic type tool holder 6 of the present embodiment, for example, it is possible to perform processing that could not be performed with a conventional small table stroke, such as molding the body of the cylindrical body W.

As described above, according to the present embodiment, a large machining stroke of the machining tool 30 can be ensured without increasing the table stroke of the machining table 2 . As a result, it is possible to shorten the molding time of the tubular body W and improve the production efficiency, while performing various molding processes on the tubular body W.

Further, in the present embodiment, the stroke mechanism 35 has a first stroke mechanism 50 that moves the holding member 31 toward the cylindrical body W relative to the holder body 32 in one axial direction.
In this case, the first stroke mechanism 50 pushes the piston 45 to one side in the axial direction by the pressure of the air supplied to the cylinder chamber 37, thereby moving the holding member 31 and the processing tool 30 to the one side in the axial direction toward the cylindrical body W. Although not shown, the can manufacturing apparatus 1 uses, for example, an air mechanism for holding the cylindrical body W with the chuck 7 and an air mechanism for supplying air into the cylindrical body W during molding by the processing tool 30. Compared to the case where an electric actuator or the like is used as the first stroke mechanism 50, the use of air pressure as in the present embodiment does not require a large-scale structural change of the device, and it is also easy to supply and stop the air supply and stop in mechanical synchronization with the reciprocating movement of the processing table 2. Therefore, air can be supplied to the cylinder chamber 37 at appropriate timing.

Further, in the present embodiment, the stroke mechanism 35 has a second stroke mechanism 51 that moves the holding member 31 to the other side in the axial direction opposite to the cylindrical body W with respect to the holder body 32. The second stroke mechanism 51 has a biasing member 34, and the biasing force of the biasing member 34 biasing the holding member 31 to the other side in the axial direction is smaller than the air pressure with which the first stroke mechanism 50 pushes the holding member 31 to the one side in the axial direction.
In this case, when air is supplied to the cylinder chamber 37, the holding member 31 moves to one side in the axial direction due to air pressure, and when the supply of air to the cylinder chamber 37 is stopped, the holding member 31 moves to the other side in the axial direction due to the biasing force of the biasing member 34. Therefore, the holding member 31 and the processing tool 30 can be stably reciprocated in the axial direction at appropriate timing.

Further, in this embodiment, the protrusion 42 of the anti-rotation portion 40 is inserted into the groove 46, and the lubricant supplied from the lubricant supply port 43 of the anti-rotation portion 40 is configured to reach the sliding member 33 via the groove 46.
In this case, the relative rotation of the holder body 32 and the holding member 31 about the central axis C can be restricted by the anti-rotation portion 40 and the groove 46, and the machining accuracy of the cylindrical body W by the machining tool 30 can be stabilized. Also, since the lubricant can be supplied to the sliding member 33 through the groove 46 from the lubricant supply port 43 of the anti-rotation portion 40, the function of the sliding member 33 can be favorably maintained while the tool holder 6 is made compact.

It should be noted that the present invention is not limited to the above-described embodiments, and, for example, as described below, changes in configuration can be made without departing from the gist of the present invention.

7 to 10 show modifications of the telescopic type tool holder 6 described in the above embodiment. In this modified example, the same names and symbols are given to the same configurations as in the above-described embodiment, and the description thereof is omitted.

In the above-described embodiment, the first stroke mechanism 50 has one set of the cylinder chamber 37, the piston 45, the air supply port 38, and the air discharge port 39. In this modification, as shown in FIGS. 7 to 10, the first stroke mechanism 50 has a plurality of such sets. Specifically, in the illustrated example, the first stroke mechanism 50 has two such sets, and the two sets are arranged axially side by side (that is, in series).

In this case, the thrust that pushes the piston 45 toward one side in the axial direction by the air pressure is doubled according to the number of the sets. Concretely, when there are two sets, the thrust is approximately doubled compared to when there is one set. For this reason, for example, molding of the cylindrical body W, which requires a large thrust force, can be performed. Moreover, even when the air pressure supplied to the cylinder chamber 37 is low, a large thrust force can be stably applied to the holding member 31 and the processing tool 30 . For example, when the pressure of the air supplied to the air supply port 38 is 0.3 MPa, in this modified example, the difference between the air pressure with which the first stroke mechanism 50 pushes the holding member 31 to one side in the axial direction and the urging force with which the second stroke mechanism 51 urges the holding member 31 to the other side in the axial direction is 250 kg or more.

In the above-described embodiment, an example in which the holding member 31 is provided with the groove 46 and the holder main body 32 is provided with the anti-rotation portion 40 and the sliding member 33 has been described, but the present invention is not limited to this. Although not particularly shown, the holding member 31 may be provided with the anti-rotation portion 40 and the sliding member 33 , and the holder body 32 may be provided with the groove 46 . That is, one of the holding member 31 and the holder main body 32 should have the groove 46 extending in the axial direction, and the other of the holding member 31 and the holder main body 32 should have the anti-rotation portion 40 inserted into the groove 46 .

In the above-described embodiment, the plurality of tool holders 6 attached to the processing table 2 include the fixed type and the telescopic type, but the present invention is not limited to this. All of the plurality of tool holders 6 may be telescopic type tool holders 6 .

In the above-described embodiment, the configuration in which the first stroke mechanism 50 moves (extends) the holding member 31 in the axial direction by air pressure is taken as an example, but the configuration is not limited to this. Moreover, although the second stroke mechanism 51 moves (contracts) the holding member 31 in the axial direction by the biasing force of the biasing member 34, the configuration is not limited to this. Although not particularly illustrated, the stroke mechanism may be configured to reciprocate (extend and contract) the holding member 31 in the axial direction by, for example, an electric actuator or the like.

In the above-described embodiment, the can manufacturing apparatus 1 is an example of a bottle can manufacturing apparatus that manufactures bottle cans P by performing various processes on a bottomed tubular body W, but the present invention is not limited to this. The can manufacturing apparatus 1 may be, for example, an aerosol can manufacturing apparatus that manufactures aerosol cans by subjecting the tubular body W to various processing, or a can manufacturing apparatus that manufactures cans other than bottle cans and aerosol cans. Further, the cylindrical body W is not limited to a cylindrical shape with a bottom, and may be a simple cylindrical shape without a bottom wall.

The present invention may combine the respective configurations described in the above-described embodiments and modifications, etc., without departing from the spirit of the present invention, and addition, omission, replacement, and other changes of the configuration are possible. Moreover, the present invention is not limited by the above-described embodiments and the like, but is limited only by the scope of the claims.

According to the tool holder and the can manufacturing apparatus of the present invention, a large working stroke of the working tool can be ensured without increasing the table stroke of the working table. Therefore, it has industrial applicability.

DESCRIPTION OF SYMBOLS 1... Can manufacturing apparatus, 2... Processing table, 3... Holding table, 6... Tool holder, 30... Processing tool, 31... Holding member, 32... Holder body, 33... Sliding member, 34... Biasing member, 35... Stroke mechanism, 37... Cylinder chamber, 38... Air supply port, 39... Air discharge port, 40... Anti-rotation part, 43... Lubricant supply port, 45... Piston, 46... Groove, 50... First stroke mechanism, 51... Second stroke mechanism, C... Central axis, TA... Table axis, W... Cylindrical body

Claims (6)

A tool holder that holds a machining tool for machining a cylindrical body and is attached to a machining table,
a holding member that extends axially around a central axis and holds the processing tool at one end in the axial direction;
a holder body attached to the processing table, having a tubular shape extending in the axial direction, and having the holding member inserted therein;
a stroke mechanism that axially reciprocates the holding member with respect to the holder body,
tool holder. The stroke mechanism has a first stroke mechanism for moving the holding member toward the cylindrical body with respect to the holder main body in one axial direction,
The first stroke mechanism is
a cylinder chamber provided in the holder body and extending in the axial direction;
a piston provided in the holding member and arranged in the cylinder chamber;
an air supply port that supplies air to a portion of the cylinder chamber located on the other side in the axial direction relative to the piston;
an air discharge port for discharging air from a portion of the cylinder chamber located on one side in the axial direction relative to the piston;
A tool holder according to claim 1. The first stroke mechanism has a plurality of sets of the cylinder chamber, the piston, the air supply port, and the air discharge port,
Toolholder according to claim 2. The stroke mechanism has a second stroke mechanism for moving the holding member relative to the holder main body in the other axial direction opposite to the cylindrical body,
The second stroke mechanism has a biasing member that biases the holding member toward the other side in the axial direction with respect to the holder body,
The biasing force with which the biasing member biases the holding member toward the other axial side is smaller than the air pressure with which the first stroke mechanism pushes the holding member toward the one axial side,
A tool holder according to claim 2 or 3. A sliding member provided between the holding member and the holder body for sliding them in the axial direction,
one of the holding member and the holder body has an axially extending groove;
The other of the holding member and the holder body has a detent portion inserted into the groove,
The anti-rotation portion has a lubricant supply port that supplies lubricant to the groove,
configured so that the lubricant supplied from the lubricant supply port reaches the sliding member through the groove,
Tool holder according to any one of claims 1 to 4. a holding table that holds the cylindrical body and is intermittently rotated around the table axis;
a processing table reciprocally moved in the axial direction of the holding table;
The tool holder according to any one of claims 1 to 5, which holds a machining tool for machining the tubular body, is attached to the machining table,
When the processing table moves closer to the holding table, the stroke mechanism moves the holding member toward the cylindrical body in one axial direction,
When the processing table moves away from the holding table, the stroke mechanism moves the holding member in the other axial direction opposite to the tubular body.
Can making equipment.

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