JPH05123797A - Device for changing die for can seamer - Google Patents

Abstract

PURPOSE:To improve efficiency in die changing operation by automatically performing the positioning of a can seaming mechanism and the press action of the upper end of a seaming roll shaft in the die changing operation of a can seamer. CONSTITUTION:When the control mode of a driving motor is switched to a die changing mode and an actuating button is pressed, the can seaming mechanism is moved at one pitch via a center axis 7 and stopped at a predetermined position by the driving motor through a signal from a sensor 49 for rotational position. An actuator 45 is actuated at the stopped position, and the upper end of the seaming roll shaft 15 is pressed down. By this actuation, a space E is formed between a rotary frame 19 and a seaming lever 14, and the die changing operation is performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a can seamer type changing device for changing a can size in a can filling line.

[0002]

2. Description of the Related Art FIGS. 5 to 7 show the structures of a conventional can seamer seaming chuck and seaming roll.
FIG. 1 is a cross-sectional view of the general winding mechanism of a general rotary seamer. In the figure, 11 is a first seaming roll, 12 is a second seaming roll, and 13 is a seaming chuck. A seaming lever 14 is a spline (or serration) 15a on the seaming roll shaft 15.
Although it is possible to insert it and pull it out downwards,
A shaft 16 is fixed to the lever 14 so as to rotate integrally with the coaxial shaft 15, and a shaft 16 is fixed to the lever 14. The seaming rolls 11 and 12 are rotatably coaxial with each other via a bearing 18 fixed to a shaft 16 by a screw 17.
Is suspended in the center of. On the other hand, the seaming chuck 13 is attached via a spline (or serration) 22 to the lower end of a rotary cylinder 21 rotatably supported by a rotary frame 19 via a bearing 20,
It is adapted to rotate integrally with the rotary cylinder 21. A knockout rod 23 penetrates through the rotary cylinder 21 so as to be slidable in the vertical direction. Reference numeral 27 is a connecting bracket, which integrally connects the seaming lever 14 and the seaming chuck 13. That is, the bracket 27 is connected to the seaming chuck 13 via a collar 28 provided on the outer periphery, and is connected to the seaming lever 14 via a ring 29. The ring 29 is connected to the connecting bracket 27. It is rotatably fixed by a matching lock nut 30. Further, 31 is a bolt for vertically positioning the seaming chuck 13 on the rotary cylinder 21.

When the can is wound, the can is normally pushed up by the seaming chuck 13, and the seaming rolls 11 and 12 are also acted by the reaction force when pushing the can lid during the can winding operation. And then pushed upwards. Further, in order to prevent the seaming lever 14 from falling off the seaming roll shaft 15, a cam 35 that rotates around a shaft 37 attached to the seaming lever 14 is provided, and the lever 3
By turning 6, the cam 35 moves the seaming roll shaft 1
5 enters into the notch groove provided and serves as a stopper.

The upper end of the seaming chuck 13 contacts the flange of the rotary cylinder 21, and the rotary cylinder 21 is firmly supported by the bearing 20 in the vertical direction with respect to the seamer body. Since the seaming roll shaft 15 is pushed upward by the compression spring 43 via the cam lever 39 as shown in FIG. 1, the seaming lever 14 supporting the seaming rolls 11 and 12 is When fixed to the Ming roll shaft 15, its upper end abuts on a seat plate 38 attached to the rotary frame 19 (indicated by E). On the other hand, a gap F is formed between the cam lever 39 and the rotary frame 19. As described above, the vertical positions of the seaming chuck 13 and the seaming rolls 11 and 12 can be secured. 41 is a cam follower, 42
Is a seamer body frame, and 42a is a cam groove. When the can winding mechanism rotates, the seaming roll shaft 15 is rotated by the action of the cam groove 42a and the cam follower 41, and the seaming lever 14 is swung. 11 and 12 alternately perform the tightening operation.

Explaining the operation of changing the mold, when it is necessary to replace the seaming rolls 11 and 12 and the seaming chuck 13 in response to a change in the can lid diameter, the can is turned by a hand-held handle without the can. Turn the seamer, move the seaming roll to a position where it is easy to work,
Lower the upper end of the seaming roll shaft 15 with a tool,
After opening a gap between the seaming lever 14 and the seat plate 38, the bolt 31 is loosened. Along with this, the lever 36 is turned to remove the cam 35 from the notch groove of the seaming roll shaft,
Seaming rolls 11 and 12 and seaming chuck 1
3 by holding it by hand and pulling it downward, seaming lever 14
Since the seaming chuck 13 and the seaming chuck 13 are integrally connected by the connecting bracket 27, the seaming lever 14 is separated from the seaming roll shaft 15 via the spline 15a, and the seaming chuck 13 is rotated via the spline 22. 21 and is pulled down integrally via the connecting bracket 27. Next, in order to mount the seaming lever and the seaming chuck to which the seaming roll of the changed size is attached, the spline of the seaming lever 14 is set to the seaming roll shaft 15 because the spline diameter is the same as the previous one. After the splines of the seaming chuck 13 are pushed into the splines 15a of the rotary cylinder 21 respectively, the bolts 31 are tightened to stop the seaming chuck 13, and the lever 36 is rotated.
The cam 35 is put in the notch groove of the seaming roll shaft, the seaming lever 14 is stopped on the seaming roll shaft 15, and the pushing down force from the upper end of the coaxial shaft 15 is removed to complete the mounting.

[0006]

As described above, in the can changing work in changing the can size in the conventional can seamer, the manual handle is used to rotate the winding mechanism, and the seaming roll is also replaced. Since the upper end of the seaming roll shaft has to be pressed with a hand tool, there is a drawback that it takes a lot of manpower and time. In view of this, the present invention automatically positions the seaming roll shaft when replacing the seaming roll, and enables the upper end of the seaming roll shaft to be pressed by a pneumatic actuator, thereby performing the seaming roll replacement work. The above-mentioned conventional problems are solved by improving the efficiency of the above.

[0007]

For this reason, according to the present invention, a plurality of can winding mechanisms are arranged at equal pitches on an equidistant circumference from a vertical central axis, and the can winding mechanisms rotate. While pushing up the lower part of the can, a seaming chuck that supports the can lid from the top while rotating in the same direction and in the same direction as the can base, and rocks on a seaming roll axis different from the seaming chuck. A can equipped with two sets of seaming rolls and covered with a can lid, which was sent by a conveyor at the same timing, was gripped by the can base and the seaming chuck and rotated vertically while being equidistant from the central axis. In the remodeling device in the can seamer in which the upper edge of the can and the can lid are fastened by the seaming roll while being sent on the circumference and sent out to the next step, the remodeling device is , Seaminglo A control mechanism capable of detecting the rotation angle of the reel shaft, controlling the drive motor to stop the can winding mechanism at a predetermined position, and then arbitrarily feeding the can winding mechanism one pitch at a time. Mounted on the Cima body frame,
An actuator capable of pushing down the upper end of the swing shaft of the seaming roll at one position of the can winding mechanism stop position is provided as a means for solving the problem.

[0008]

[Function] As a means for rotating the winding mechanism when changing the can size when changing the can size of the can seamer, a detector for detecting the position of the rotation angle of the rotation center axis (vertical axis) of the mechanism and the can seamer A control device that combines a drive motor and a manual switch of the motor stops the drive motor and stops the winding mechanism when each winding mechanism reaches a predetermined position on the frame of the can seamer body. Then, when the manual switch is pressed, the winding mechanism moves by one pitch and stops again. In addition, a compressed air actuated actuator is attached to a predetermined position of the frame of the can seamer body, and it operates so as to push the upper end of the seaming roll shaft of the winding mechanism that has stopped, so that the seaming roll replacement work can be performed. make it easier.

[0009]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a vertical sectional view of a rotary can seamer winding mechanism showing an embodiment of the present invention, and FIGS. It is explanatory drawing of the principal part of. A general can seamer winding mechanism has been described with reference to FIGS. 5 to 7 showing a conventional technique. However, since the winding mechanism in the embodiment of FIG. The description will be omitted, and points different from those in FIGS. 5 to 7 will be described.

1 to 4, 7 is a vertical center axis of the can seamer, and a rotary frame 19 integrated with a cylindrical axis concentric with the central axis 7 is rotatably fitted to the vertical central axis 7. The rotary frame 19 has a plurality of winding mechanisms arranged at equal pitches on the same circumference. The vertical center shaft 7 rotates in the opposite direction of the rotary frame 19, that is, in the direction of the arrow Y, and the seaming chuck 13 on the rotary frame 19 and the can base 9
And the can 8 is rotated at high speed in the direction of arrow Z. The body frame 42 is a fixed frame.
2, a cam groove 42a and a through hole 42b are provided. Further, a pneumatic actuator 45 is attached to the main body frame 42, an operating rod of the actuator 45 passes through the through hole 42b, and a rotational position sensor 49 is attached to the upper left of the main body frame 42. The rotation of the vertical central shaft 7 is transmitted from the bevel gear 46 attached to the upper end of the central shaft to the small bevel gear 47, and is transmitted from the shaft of the small bevel gear 47 to the rotational position sensor 49 via the direct coupling coupling 48.

FIG. 2 shows the structure of the rotational position sensor 49. The sensor 49 is provided with a disc 51,
The disc 51 is rotated by the rotation transmitted from the small bevel gear 47.
Is designed to rotate. The disk 51 is provided with grooves 51a or protrusions on the outer circumference of the disk 51 evenly, and the proximity sensor 52 capable of adjusting the mounting angle along the outer circumference of the disk 51 allows
The groove 51a or the protrusion of the disc 51 can be detected. If the can seamer has 12 cores (have 12 can winding mechanisms), the rotary speed of the rotary frame 19 and the rotary speed of the vertical central shaft 7 are the same, and the gear ratio of the bevel gear 46 and the small bevel gear 47 is 3; If: 1
The groove 51a or the protrusion of the disc 51 can be adjusted to the pitch of the can winding mechanism by providing four grooves 51a on the circumference. Further, instead of the rotational position sensor 49, the structure of the position sensor 55 shown in FIG. That is, the position sensor 55 is attached near the through hole 42b of the main body frame 42 and can directly detect the upper end 15b of the seaming roll shaft 15.

Next, a description will be given of the work of attaching / detaching the seaming lever to / from the seaming roll shaft. When the control mode of the drive motor (not shown) is switched to the mold change, the drive motor is closed by the drive motor every time the operation button is pressed. Move by one pitch to stop at the specified position. When the operating rod of the pneumatic actuator 45 is actuated to push down the upper end 15b of the seaming roll shaft 15 at the stopped position, a gap is created between the rotary frame 19 and the seaming lever, and the seaming lever 14 is moved vertically. The pushing force is released, the cam 35 holding the seaming lever 14 and the seaming roll shaft 15 is easily released, and the seaming lever 14 can be easily pulled out from the seaming roll shaft 15.
The seaming chuck 13 can be easily removed by loosening the bolt 31. Next, insert the replacement seaming chuck into the spline 22 with the bolt 31
The seaming lever to be replaced is fitted on the seaming roll shaft 15 and stopped by the cam 35. Next, pneumatic actuator 45
Pull up the operating rod of and press the operating button to move to the next mold changing work. In the case of the position sensor 55 of FIG. 3, the operation is exactly the same.

[0013]

As described above in detail, according to the present invention, since the seaming roll shaft can be automatically pressed by the pneumatic actuator during the work change of the can seamer, the seamer can be moved by the conventional handwheel. As compared with the case where the seaming roll shaft is held down by the turning hand tool, it has an excellent effect such that manpower and time can be remarkably reduced.

[Brief description of drawings]

FIG. 1 is a partially cutaway sectional view of a can seamer according to an embodiment of the present invention.

FIG. 2 is a structural diagram of a rotary position sensor according to an embodiment of the present invention.

FIG. 3 is a vertical sectional view of a position sensor mounting portion according to the embodiment of the present invention.

FIG. 4 is a vertical cross-sectional view around a conventional seaming roll shaft.

FIG. 5 is a plan view of a conventional can seamer winding mechanism.

FIG. 6 is a side view of a conventional seaming roll.

FIG. 7 is a vertical sectional view of a conventional winding mechanism.

[Explanation of symbols]

 7 Vertical Center Axis 8 Can 9 Can Stand 11, 12 Seaming Roll 13 Seaming Chuck 14 Seaming Lever 15 Seaming Roll Axis 42 Body Frame 45 Pneumatic Actuator 49 Rotation Position Sensor 55 Position Sensor

Front page continuation (72) Inventor Hirofumi Ito 1 Takamichi, Iwazuka-cho, Nakamura-ku, Nagoya City Mitsubishi Heavy Industries, Ltd. Nagoya Machinery Works (72) Inventor Tamiya century Iwazuka-cho, Nakamura-ku, Nagoya City Mitsubishi Heavy Industries Inside Nagoya Equipment Mfg. Co., Ltd. (72) Inventor Masamitsu Takahara 60-1 Kyutansho, Iwatsuka-cho, Nakamura-ku, Nagoya

Claims (1)

[Claims] 1. A can base in which a plurality of can winding mechanisms are arranged at equal pitches on a circumference equidistant from a vertical center axis, and the can winding mechanism pushes the lower part of the can while rotating. Conveyor equipped with a seaming chuck that supports the can lid from above while rotating in the same direction and with the same direction as the can base, and two sets of seaming rolls that swing on a seaming roll axis different from the seaming chuck. While the can covered with the can, which has been sent in timed by, is being held by the can base and the seaming chuck and being rotated vertically while being fed on the circumference at an equal distance from the central axis. In a remodeling device for a can seamer in which the upper edge of the can and the can lid are wound by the seaming roll and sent out to the next step, the remodeling device detects the rotation angle of the seaming roll shaft. Drive Control mechanism that stops the can winding mechanism at a predetermined position and then feeds the can winding mechanism one pitch at a time. A can-seamer type changing device comprising: an actuator capable of pushing down the upper end of the swing shaft of the seaming roll at one position of the fastening mechanism stop position.