JPH0671351A - Device for forming can - Google Patents

Abstract

PURPOSE:To smoothly support the punch, to move it back and forth on a straight line, to further improve the processing speed for forming can bodies, to prevent the wear of a shaft supporting part and to stably perform the forming process of the can bodies for a long time. CONSTITUTION:When a pinion 116 whose pitch diameter is the same as the pitch radius of a gear 106 is revolved, in a state engaged with the inner peripheral teeth of the gear 106, on the axial line of the gear 106 as a center by means of a driving mechanism, the pinion 116 is rotated concurrently with the revolution and a point on the pitch circle of the pinion 116 generates the locus of movement back and forth on the diameter of the pitch circle of the gear 106. Consequently, the punch 5 which is provided freely rotatably on the one point of the pitch circle of the pinion 116 makes a linear movement back and forth, such movement is supported by a fluid bearing, a pressure fluid is interposed between the punch 5 and the shaft supporting part, and a direct contact between the punch 5 and the shaft supporting part is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention applies a deep drawing and ironing process (DI process, draw and ioning process) by linearly moving a punch back and forth in a through hole of a die. The present invention relates to a can forming device for forming a metal can body such as

[0002]

2. Description of the Related Art Generally, a bottomed cylindrical can body made of aluminum, steel, etc. is formed into a cup shape by a cupping press of a plate material such as aluminum, steel, etc., and then installed in a through hole of a die. In this state, it is formed by deep drawing and ironing with a punch that can move linearly back and forth.

[0003]

By the way, as a mechanism for reciprocating linear motion of the punch, hitherto, the punch is connected to the rotary shaft of the rotary machine through a crank and a connecting rod, and the rotary motion of the rotary machine is controlled by the crank and The one that drives the punch by changing it into a linear motion by a connecting rod is used. However, in such a conventional drive mechanism as described above, the punch does not make a reciprocating linear motion in its axial direction in a strict state, but shakes in a direction orthogonal to the axial line. There is a limit to the speed, which is a constraint in improving the molding speed of the can body, and the bearing part that slidably supports the punch cannot withstand continuous operation for a long period of time. There is. Therefore, as a result of diligent studies by the present inventors, a large gear with inner peripheral teeth formed,
A small gear that has a pitch circle diameter that is the same as the pitch circle radius of this large gear and that meshes with the inner peripheral teeth of the large gear and that moves along this large gear, and that is connected to this small gear and that is small. A new can forming device has been developed which is composed of a drive mechanism for revolving a gear about the axis of the large gear and a punch rotatably provided on the pitch circle of the small gear. Then, in this can forming device, a small gear having a pitch circle diameter of the same diameter as the pitch circle radius of the large gear is meshed with the inner peripheral teeth of the large gear, and the small gear is driven by the drive mechanism. When revolving around the axis of the large gear, the small gear revolves along with the revolution, and a point on the pitch circle of the small gear reciprocates on the diameter of the pitch circle of the large gear to draw a trajectory. As a result, since the punch rotatably provided at one point on the pitch circle of the pinion gear moves in a reciprocating linear motion, the punch can be moved smoothly and quickly in a reciprocating linear motion, and the forming speed of the can body can be increased. In addition to being able to improve the performance, it is possible to prevent the bearing portion supporting the movement of the punch from being burdened, and the molding process of the can body can be stably performed for a long period of time.

With the development of the above-mentioned new can forming apparatus, the present invention improves the shaft supporting portion for supporting the reciprocating movement of the punch. The object of the present invention is to improve the shaft supporting portion and the punch. Can prevent the direct contact of
The punch can be smoothly supported and can be quickly moved back and forth in a straight line, the molding processing speed of the can can be further improved, and the shaft supporting portion can be prevented from being worn, and An object of the present invention is to provide a can forming device that can stably perform a forming process of a can body over a long period of time.

[0005]

In order to achieve the above object, the present invention forms a can body by deep drawing and ironing by moving a punch linearly in a through hole of a die. In the can forming apparatus, a large gear having inner teeth formed thereon, and a gear having a pitch circle diameter of the same diameter as the pitch circle radius of the large gear, and meshing with the inner teeth of the large gear, From a small gear that moves along, a drive mechanism that is connected to this small gear and that revolves the small gear around the axis of the large gear, and a punch that is rotatably provided on the pitch circle of the small gear. The shaft supporting portion for movably supporting the punch is composed of a fluid bearing.

[0006]

In the can forming apparatus of the present invention, the small gear having the same pitch circle diameter as the pitch circle radius of the large gear is engaged with the inner peripheral teeth of the large gear by the drive mechanism. When the small gear is revolved around the axis of the large gear, the small gear rotates along with the revolution, and a point on the pitch circle of the small gear reciprocates on the diameter of the pitch circle of the large gear. As a result, the punch rotatably provided at one point on the pitch circle of the pinion gear makes a reciprocating linear movement, and the reciprocating linear movement of the punch is supported by a fluid bearing, and the punch and the shaft supporting portion are By interposing a pressure fluid between them, direct contact between the punch and the shaft support is prevented.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

In these drawings, a can forming apparatus according to an embodiment of the present invention is inserted into a cup-shaped material 3 which has been carried into a position of a through hole 2a of a die 2 from above a fixed frame assembly 1. Then, a cup holder 4 for positioning and fixing the raw material 3 and a long punch 5 for deep-drawing and ironing the raw material 3 through the inside of the cup holder 4 and the through hole 2a of the die 2. , A can bottom receiving portion 6 that faces the punch 5 to form a can bottom, a can body unloading mechanism 8 that carries out the can body 7 completed in the can bottom receiving portion 6, and the punch 5 is linearly moved back and forth. Punch drive mechanism 10
And two punch bearing mechanisms 20 that support and guide the reciprocating linearly moving punch 5, and gas is ejected from the tip of a gas ejection hole 5a formed in the center of the punch 5 to punch the can body 7. Gas discharge mechanism 3 for releasing from the tip of 5
0 and the motor 1 which is the drive source of the punch drive mechanism 10
And a cup holder drive mechanism 40 for linearly moving the cup holder 4 in a reciprocating manner in synchronization with the punch 5.

The can body unloading mechanism 8 is an endless chain 81 wound around a plurality of sprockets 80, and is attached to the outside of the chain 81 at predetermined intervals, and the movement of the chain 81 causes the can bottom to move. An L-shaped can body placing tool 82 on which the can body 7 of the receiving portion 6 is placed and lifted and conveyed obliquely upward, and a carry-out for receiving and carrying out the can body 7 placed on the can body placing tool 82. It is composed of a chute 83.

In the punch drive mechanism 10, the motor 100 is installed on one end surface (the left end surface in FIGS. 1 and 3) of the fixed frame assembly 1 so as to be vertically rotatable. A pulley 101 is attached to the output shaft of the motor 100. Then, the pulley 10
1, a flywheel 103 is connected to a fixed belt assembly 1 via a belt 102. The flywheel 103 is rotatably mounted on a small diameter portion of a fixed cylindrical body 104 mounted on the fixed frame assembly 1 via a bearing 105. It is installed.

An annular large gear 106 having inner peripheral teeth is attached to the inner surface of the intermediate portion of the fixed cylindrical body 104, and the small tip end portion and the large proximal end portion of the fixed tubular body 104 are attached. A rotary shaft body 109 having a diameter increased in multiple steps from a small diameter portion at the distal end to a large diameter portion at the proximal end is rotatably mounted on each inner surface via bearings 107 and 108, respectively.
Between the flywheel 103 and the rotary shaft body 109, rotation and transmission of the rotation are achieved by a clutch brake 110 mounted on the rotary shaft body 109, and the clutch brake 110 is adjacent to the clutch brake 110. By releasing the pressurized air from the pressurized air manifold 111, the clutch is disengaged and the brake is activated.

Further, a small gear accommodating portion 112 is formed in the large diameter portion at the base end of the rotary shaft body 109, and in this small gear accommodating portion 112, a pair of bearings 113 and 114 are provided. A hollow gear support 115 is rotatably mounted. And, in the middle part of the gear support 115,
A small gear 116 meshing with the inner peripheral teeth of the large gear 106 is mounted, and the pitch circle diameter of the small gear 116 is set so as to match the pitch circle radius of the large gear 106.

Furthermore, on the base end side of the gear support 115, a pitch circle extending portion 117 protruding outward from the bearing 114 is provided, and the pitch circle of the pinion gear 116 is arranged along the axis of the pinion gear 116. The pitch circle support shaft 118 is attached to the end of the pitch circle extension 117. A connecting rod 119 extending to the axis of the pinion gear 116 (gear support 115) is attached to the pitch circle support shaft 118, and the pinion 116 (gear support 115 of the connecting rod 119 is attached. ), The connecting pin 12
0 is rotatably connected. The axis of the connecting pin 120 is set to coincide with the axis of the gear support 115 (small gear 116).

The tip of an L-shaped rotary member 121 is rotatably connected to the connecting pin 120.
The base end portion of the character-shaped rotating body 121 is rotatably supported by the fixed frame assembly 1 via a bearing 122. The axis line of the base end portion of the L-shaped rotary body 121 is set to match the axis line of the rotary shaft body 109. Further, a connecting rod 124 is rotatably connected to the pitch circle extending portion 117 via a bearing 123, and a pair of sliding contact members 125, so as to cover a part of the bearing 123.
126 are attached to the connecting rod 124 in a state of sliding contact with the pitch circle support shaft 118 side of the pitch circle extension 117 and the pitch circle support shaft 118, respectively. The base end of the punch 5 is rotatably connected to the tip of the connecting rod 124 via a hollow pin 127.

The two punch bearing mechanisms 20 are liquid bearings (hydrostatic bearings) provided in the fixed frame assembly 1, respectively. In these liquid bearings, a bearing tubular portion 201 is mounted inside a fixed tubular portion 200, and the bearing tubular portion 201 is provided with a pair of annular end portions 202 spaced apart by a predetermined distance and four connecting portions. 203 and the annular end portion 202 and the connecting portion 203.
The four rectangular liquid injection holes 204 are formed by the above, and the discharge groove 205 is formed on the inner surface of each connecting portion 203. Then, a pressurized liquid is supplied to each of the liquid injection holes 204 from a liquid injection connector 206 mounted on the fixed cylinder portion 200.

In the gas discharge mechanism 30, one end of a hose 300 is connected to the base end of the gas discharge hole 5a of the punch 5, and the other end of the hose 300 is in sliding contact with the pitch circle support shaft 118 side. Hose mounting hole 1 formed in the tool 126
26a. And the hose mounting hole 1
Reference numeral 26a includes a sliding contact member 12 on the pitch circle support shaft 118 side.
An internal hole 118a formed in the pitch circle support shaft 118 is communicated with a ring-shaped space 126b formed in No. 6, and the internal hole 118a is aligned with the axis of the pitch circle support shaft 118. The hose 300 includes one inlet hole formed along the inlet and a cross-shaped outlet hole communicating with the inlet hole and communicating with the ring-shaped space 126b formed in the sliding contact tool 126. And the hose mounting hole 126a of the sliding contact tool 126 and the ring-shaped space 12
6b, the gas discharge hole 5a and the pitch circle support shaft 1
Gas communication means 301 for communicating with the internal hole 118a
Is configured.

The connecting rod 119 is provided in the inlet hole of the internal hole 118a formed in the pitch circle support shaft 118.
Is connected to the communication hole 119a, and the communication hole 119a is connected to the communication hole 119a through the ring-shaped recess 120a formed in the connecting pin 120.
Are in communication. And, in this circulation hole 120b,
Ring-shaped recess 120c formed on the connecting pin 120
A substantially hook-shaped flow hole 121a formed in the L-shaped rotary body 121 is communicated with each other through the communication hole 12a.
A communication hole 302a of the ring body 302 attached to the L-shaped rotary body 121 is communicated with the la 1a, and these communication holes 119a, the ring-shaped recess 120a, the flow hole 120b, and the ring-shaped recess are formed. Location 120c and flow hole 121
The gas flow passage 305 is configured by a and the communication hole 302a.

Further, the ring body 302 is slidably provided on a ring-shaped slidable contact member 303. The slidable contact member 303 is provided with a spring 304 provided on the fixed frame assembly 1 so as to form the ring. The body 302 is pressed and biased. Then, the communication hole 3 of the ring body 302
02a has a gas supply hole 303a formed in the sliding contact member 303 and the ring body 302 (L-shaped rotary member 12).
The gas supply source A is connected to the gas supply hole 303a.

The cup holder drive mechanism 40 is connected to a pulley 400 attached to the tip of the rotary shaft 109 and a pulley 401 attached to the pulley 400 via a belt 401, and an input shaft of a cam box 402 having a double cam mechanism. 40
2a, a pair of tension rollers 404 for adjusting the tension of the belt 401, a pivot shaft 405 provided on the output side of the cam box 402 so as to be swingable within a predetermined angle range, A pair of rotating rollers 407 provided at both ends of the pivot shaft 405 so as to face each other via a connecting member 406, and a roller receiving portion 408a for rotatably supporting these rotating rollers 407.
And an inner movable cylinder 408 movably provided on the outer periphery of the fixed cylindrical portion 200 of the punch bearing mechanism 20 on the tip side of the punch 5, and an outer movable body 408 movably provided on the outer periphery of the inner movable cylinder 408. Moving barrel 409 and these moving barrels 40
8 and 409, and a pressurizing chamber 410 whose inside is maintained at a predetermined hydraulic pressure, and an outer moving cylinder 409, which is attached to each of the roller receiving portions 408a and the fixed cylindrical portion 200. Two support rods 411 slidably supported by the rod slide portion 200a, and these support rods 41
1 and a front cylindrical body 412 connected to the tip end of the first cylindrical body 412. The cup holder 4 is attached to the front cylindrical body 412.

A water-soluble lubricating liquid is supplied to the die 2 in order to cool the die 2 and the punch 5 during deep drawing and ironing and prevent seizure of the material 3. Further, the bearings 107, 108 of the punch driving mechanism 10 are
113, 114, 123, the hollow pin 127 portion, the liquid injection connector 206 of the punch bearing mechanism 20, and the pressurizing chamber 410 of the cup holder drive mechanism 40 are the same kind of component as the lubricating liquid and have a viscosity (concentration). A large amount of lubricating liquid is being supplied. These lubricating liquids are supplied from the same supply source, and the lubricating liquid supplied to the die 2 is diluted with water to an appropriate concentration and supplied to the die 2. It is configured.

When the can body 7 is formed by using the can forming apparatus having the above-described structure, first, the cup-like shape is carried in from above the fixed frame assembly 1 to the through hole 2a of the die 2. Inside the material 3 of the cup holder drive mechanism 4
The cup holder 4 is inserted by 0 to position and fix the material 3, and the punch 5 supported and guided by the two punch bearing mechanisms 20 is moved by the punch driving mechanism 10 into the inside of the cup holder 4 and the die. Two
After passing through the through hole 2a of the punch 3 and subjecting the material 3 to deep drawing and ironing, and contacting the can bottom receiving portion 6 to complete the can body 7, the gas discharging mechanism 30 gas discharge hole of the punch 5 is formed. The can body 7 is released from the tip of the punch 5 by ejecting gas from the tip of the can body 7.
While driving the chain 81 of the can body unloading mechanism 8 and placing the chain on the can body platform 82, the chain is lifted obliquely upward and guided to the carry-out chute 83.

In this case, the operation of the punch drive mechanism 10 for linearly moving the punch 5 back and forth will be described in detail. First, the rotary shaft of the motor 100 is rotated to move the pulley 10 to the pulley 10.
1, by rotating the flywheel 103 via the belt 102, the flywheel 103 is rotated through a clutch brake 110 connecting the flywheel 103 to the rotary shaft body 109 during normal operation. It is transmitted to the body 109. As a result, the rotary shaft 1
09 rotates via both bearings 107 and 108, so that both bearings 11 are accommodated in the small gear housing portion 112 of this rotating shaft body 109.
Gear support 1 rotatably mounted via 3,114
15 and the small gear 116 rotate (revolve) about the axis of the rotary shaft 109, whereby the fixed cylindrical body 10
The small gear 116, which is in mesh with the inner peripheral teeth of the large gear 106 fixed to the No. 4, rotates together with the gear support 115 around their axes (rotates).

As a result, the pitch circle support shaft 118 attached to the end of the pitch circle extension 117 formed to project at the base end of the gear support 115 is attached to the pitch circle support shaft 118 via the bearing 123. Along with the connecting rod 124, the hollow pin 127, and the punch 5 which are rotatably connected, only the diameter of the pitch circle of the large gear 106 (in FIG. 1 and FIG. 6, it corresponds to the left end position of the pitch circle of the large gear 106). Therefore, the reciprocating linear movement is made within the range from this position to the right end position of the pitch circle of the large gear 106.

Here, the relationship between the large gear 106, the small gear 116 that meshes with the inner peripheral teeth of the large gear 106, and the pitch circle support shaft 118 attached to the end of the pitch circle extension 117 is shown in FIG. Describing with reference to FIG. 14, the small gear 116 having the pitch circle diameter set so as to match the pitch circle radius of the large gear 106 is rotated along the inner peripheral teeth of the large gear 106 while By going around (from the position shown in FIG. 11 to FIG. 12, FIG. 13, FIG.
4 (returning to the position shown in FIG. 11 through the position shown in FIG. 4), a point on the pitch circle of the small gear 116 (the axis of the pitch circle support shaft 118) P moves on the pitch circle diameter D of the large gear 106. , It makes a reciprocating linear motion that moves from the left end to the right end and then returns to the left end.

In this case, one point P on the pitch circle of the small gear 116 rotates once while reciprocating linearly while the small gear 116 makes one revolution while rotating along the inner peripheral teeth of the large gear 106. Therefore, the pitch circle support shaft 118 also makes one rotation about its axis while performing a reciprocating linear motion. As a result, in FIG. 6, the connecting rod 1 rotatably connected to the pitch circle support shaft 118 via the bearing 123.
Since the reference numeral 24 smoothly supports the rotation (rotation) of the pitch circle support shaft 118 by the bearing 123 and moves linearly back and forth,
The punch 5, which is connected to the connecting rod 124 via the hollow pin 127, also surely and swiftly moves linearly without shaking in the direction orthogonal to its axis. Therefore, the punch 5 can be smoothly inserted into the through hole 2a of the die 2, and the can body 7 can be molded at a high speed.

The end of the connecting rod 119 attached to the pitch circle support shaft 118 to the axis of the pinion gear 116 (gear support 115) is rotatably connected to this end. 120 together with the pinion gear 116
Similarly to the axis of, the rotary motion is performed around the axis of the large gear 106 (rotating shaft 109). Further, an L-shaped rotating body 121 that rotatably supports the connecting pin 120.
Rotates with the rotational movement of the connecting pin 120 about the axis of the large gear 106 (rotating shaft 109).

Further, as described above, when the punch 5 reciprocates linearly, four liquid injection connectors 206 are provided.
From the four cylindrical liquid injection holes 2 of the bearing tubular portion 201 via the fixed tubular portions 200 of the both punch bearing mechanisms 20.
By supplying the pressurized liquid to the inside of 04, the punch 5 can be held in a state of being floated from the inner surface of the bearing tubular portion 201 by the pressure of the pressurized liquid, and the punch 5 and the bearing tubular portion 201 The frictional resistance can be greatly reduced, and the reciprocating linear motion of the punch 5 can be smoothly supported and guided.

On the other hand, with the rotation of the rotary shaft 109, the cam box 40 is driven through the pulley 400, the belt 401 and the pulley 403 of the cup holder drive mechanism 40.
The rotation of the second input shaft 402a causes the rotary roller 407 at the upper end of the two connecting members 406 to swing about the pivot shaft 405 within a predetermined angle range.
As a result, the inner moving barrel 408 slides back and forth along the fixed barrel portion 200 of the punch bearing mechanism 20 via the roller receiving portion 408a holding the rotating rollers 407 therebetween, so that the pressurizing chamber Outer moving tube 409 via 410
Moves in the same direction as the inner moving barrel 408, and the two support rods 411 attached to the outer moving barrel 409 are the support rod sliding portions 200a of the roller receiving portions 408a and the fixed barrel portion 200. Slide while being supported by.

As a result, the cup holder 4 is inserted through the front cylinder 412 attached to the tip of each support rod 411.
Moves toward and away from the die 2. Therefore, when performing deep drawing / ironing on the cup-shaped material 3 set at the position of the through hole 2a of the die 2 by the punch 5, the cup holder 4 is placed inside the material 3 at the position of the through hole 2a of the die 2. The material 3 is inserted, and the material 3 is pinched between the cup holder 4 and the die 2 and positioned and fixed.

In this case, the rotating rollers 407 at the upper ends of the two connecting members 406 swinging about the pivot shaft 405 and the roller receiving portion 408a sandwiching these rotating rollers 407 are connected to each other. Moving barrel 408
Are set so as to be advanced slightly to the die 2 side from the forward limit of the cup holder 4 when the cup-shaped material 3 is sandwiched between the cup holder 4 and the die 2.
The forward movement of the cup holder 4 is blocked by the material 3 so that the front cylinder 412, the support rod 411, and the outer movement cylinder 409 that directly move the cup holder 4 are pressed by the pressurizing chamber 410. Against the inner moving cylinder 408
To retreat slightly. As a result, the cup holder 4 firmly presses the material 3 against the die 2 by the pressure of the pressurizing chamber 410, so that the material 3 can be firmly held.

If the cup-shaped material 3 is not set at a predetermined position of the through hole 2a of the die 2, the cup holder 4 is brought into contact with the material 3 at the normal time. Force greater than the pressing force of the cup holder 4
Join in. In this case, the pressurizing force of the pressurizing chamber 410 rises abnormally. Therefore, by releasing this pressure from the pressurizing chamber 410, the cup holder 4, the front cylindrical body 412, the support rod 411 and the outer moving cylinder. The mold 409 such as the cup holder 4 and the die 2 is prevented from being damaged by retracting the 409 with respect to the inner moving cylinder 408.

Further, the punch 5 is the through hole 2 of the die 2.
When the can 7 is released from the punch 5 after the can 7 is formed by inserting the a into the can bottom receiving portion 6, a ring attached to the L-shaped rotary body 121. The communication hole 302a of the body 302 and the sliding contact member 30 that is in sliding contact with the ring body 302 by the urging force of the spring 304.
By communicating with the gas supply hole 303a of No. 3, from the gas supply source A, the above-mentioned gas supply hole 303a and the communication hole 302.
a, circulation hole 121a of L-shaped rotating body 121, connecting pin 1
20 ring-shaped recess 120c, flow hole 120b, ring-shaped recess 120a, communication hole 119a of connecting rod 119, internal hole 118a of pitch circle support shaft 118, ring-shaped cavity 126b of sliding contact tool 126, and hose mounting hole. Gas is supplied into the gas discharge hole 5a of the punch 5 through the 126a and the hose 300. Then, by discharging the gas from the tip of the gas discharge hole 5a, the can body 7 can be easily released from the mold.

In this case, the sliding contact member 303 is surely pressed against the ring body 302 by the spring 304, and between the connecting pin 120, the L-shaped rotating body 121 and the connecting rod 119, and the pitch. Since the space between the circular support shaft 118 and the sliding contact tool 126 is sufficiently sealed, the ring body 302 and the L-shaped rotary body 12 are sealed.
1, connecting pin 120, connecting rod 119, pitch circle support shaft 1
18, even if the sliding contact device 126 moves individually, the gas supply source A
It is possible to reliably discharge the gas from the tip of the gas discharge hole 5a of the punch 5 at a predetermined time without leaking the gas from the middle of the gas. Further, since the hose 300 is arranged only between the sliding contact tool 126 and the punch 5 which make the same reciprocating linear motion, the hose 300 may be damaged or fall off even if the punch 5 moves at a high speed. It can be used stably for a long period of time.

Each bearing 1 of the punch drive mechanism 10
07,108,113,114,123, hollow pin 12
Liquid injection connector 206 of the 7th part and punch bearing mechanism 20
By supplying the lubricating liquid from the lubricating liquid supply source to the pressurizing chamber 410 of the cup holder driving mechanism 40, respectively, the lubricating of the moving body supporting portion is promoted and the moving bodies are smoothly rotated or linearly moved. While it can be moved and the pressure in the pressurizing chamber 410 can be maintained at a predetermined value, a lubricating liquid having a viscosity (concentration) smaller than that of the lubricating liquid is stored in the die 2 as the lubricating liquid supply source. Since it is supplied in a diluted state, it is possible to prevent the die 2 and punch 5 from cooling and the seizure of the material 3 during deep drawing and ironing, and even if the above two types of lubrication are used. Even if the liquids are mixed, since they are the same kind of components, there is no problem, and there is an advantage in maintenance that they are easy to handle and easy to process.

[0035]

As described above, the present invention provides a can forming apparatus for forming a can body by performing deep drawing and ironing by linearly moving a punch in a through hole of a die. A large gear having inner teeth formed thereon, and a small gear having a pitch circle diameter of the same diameter as the pitch circle radius of the large gear and meshing with the inner teeth of the large gear to move along the large gear. And a driving mechanism that is connected to the small gear and revolves the small gear around the axis of the large gear, and a punch rotatably provided on the pitch circle of the small gear. Since the shaft supporting portion that freely supports is composed of a fluid bearing, a state in which a small gear having a pitch circle diameter of the same diameter as the pitch circle radius of the large gear is meshed with the inner peripheral teeth of the large gear. Then, the above small gear is moved up by the drive mechanism. When revolving around the axis of the large gear, this small gear rotates along with the revolution, and a point on the pitch circle of the small gear reciprocates along the diameter of the pitch circle of the large gear to draw a locus. , A punch rotatably provided at one point on the pitch circle of the pinion gear reciprocates linearly, and the reciprocating linear movement of the punch is supported by a fluid bearing, and a pressure fluid is applied between the punch and the shaft support portion. By intervening to prevent direct contact between the punch and the shaft support part, direct contact between the shaft support part and the punch can be prevented, the punch can be smoothly supported, and the reciprocating straight line can be quickly performed. In addition to being able to move, it is possible to further improve the molding processing speed of the can body, prevent wear of the shaft support portion, and perform stable molding processing of the can body for a long period of time. .

[Brief description of drawings]

FIG. 1 is a plan view showing a left half of an embodiment of the present invention.

FIG. 2 is a plan view showing the right half of one embodiment of the present invention.

FIG. 3 is a front view showing the left half of the embodiment of the present invention.

FIG. 4 is a front view showing the right half of the embodiment of the present invention.

FIG. 5 is a side view of FIG.

FIG. 6 is a cross-sectional view of a gas discharge mechanism section.

FIG. 7 is a rear view of FIG.

FIG. 8 is a plan view of a cup holder drive mechanism section.

9 is a sectional view taken along line IX-IX in FIG.

FIG. 10 is a front view of FIG.

FIG. 11 is an explanatory diagram showing a relationship between a large gear and a small gear.

FIG. 12 is an explanatory diagram showing a state in which the small gear revolves 90 degrees from the state of FIG. 11;

FIG. 13 is an explanatory view showing a state in which the pinion gear revolves 180 degrees from the state of FIG. 11;

FIG. 14 is an explanatory diagram showing a state in which the small gear revolves 270 degrees from the state of FIG. 11;

[Explanation of symbols]

 2 die 2a through hole 5 punch 7 can body 10 punch drive mechanism 20 punch bearing mechanism (shaft support portion) 100 motor (small gear drive mechanism) 106 large gear 109 rotating shaft body (small gear drive mechanism) 116 small gear

Claims (1)

[Claims] 1. A can forming apparatus for forming a can body by performing deep drawing and ironing by linearly moving a punch in a through hole of a die to form a large gear having inner peripheral teeth. A small gear that has a pitch circle diameter that is the same as the pitch circle radius of the large gear, and that meshes with the inner peripheral teeth of the large gear and moves along the large gear, and that is connected to the small gear, and A drive mechanism that revolves a small gear around the axis of the large gear and a punch rotatably provided on the pitch circle of the small gear. A shaft support portion that movably supports the punch is a fluid bearing. A can forming device characterized in that