JP2902183B2 - Can Cima type changer - Google Patents

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 apparatus for changing a can size in a can filling line.

[0002]

2. Description of the Related Art FIGS. 4 to 7 show the structure of a seaming chuck and a seaming roll of a conventional general can seamer.
FIG. 7 is a sectional view of a general rotary seamer winding mechanism. In the figure, 11 is a first seaming roll, 12 is a second seaming roll, and 13 is a seaming chuck. Reference numeral 14 denotes a seaming lever, which is a spline (or serration) 15a on a seaming roll shaft 15.
It is possible to insert and pull down through
The lever 14 is fixed so that it can rotate integrally with the coaxial 15, and the shaft 14 is fixed to the lever 14. The seaming rolls 11 and 12 are coaxially rotatable freely through bearings 18 fixed to a shaft 16 by screws 17.
Hanged in the center of. On the other hand, the seaming chuck 13 is mounted via a spline (or serration) 22 at a lower end of a rotary cylinder 21 rotatably supported on a rotary frame 19 via a bearing 20.
It is configured to rotate integrally with the rotary cylinder 21. A knockout rod 23 penetrates through the rotary cylinder 21 so as to be slidable up and down. 27 is a communication 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 flange 28 provided on the outer periphery, and is connected to the seaming lever 14 via a ring 29. It is rotatably fixed by a matching lock nut 30. Reference numeral 31 denotes a bolt for positioning the seaming chuck 13 on the rotary cylinder 21 in the vertical direction.

[0003] When the can is fastened, the can normally exerts a pushing force on the seaming chuck 13, and the seaming rolls 11 and 12 also receive a reaction force when the can lid is pushed during the can winding operation. And it is pushed upward. In order to prevent the seaming lever 14 from falling off the seaming roll shaft 15, a cam 35 that rotates about a shaft 37 attached to the seaming lever 14 is provided.
6, the cam 35 is moved to the seaming roll shaft 1
5 enters a notch groove provided 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 urging force of the compression spring 43 via the cam lever 39 as shown in FIG.
The seaming lever 14 supporting the first and the second 12 is provided on a spline 15 a of the seaming roll shaft 15.
By engaging the cam 35 with the notch groove, the rotor lift
Seaming lever on the lower surface of the frame 19 via the seat plate 38
14 is in contact with the upper surface of the seaming rolls 11 and 12.
In the vertical direction (indicated by E). On the other hand, there is a gap F between the cam lever 39 and the rotary frame 19.
Can be. 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, 42a is a cam groove. When the can winding mechanism rotates, the seaming roll shaft 15 rotates by the action of the cam groove 42a and the cam follower 41, and the seaming lever 14 swings. The seaming rolls 11 and 12 alternately perform the tightening operation.

[0005] Next, the function of changing the mold will be described. When the seaming rolls 11, 12 and the seaming chuck 13 must be replaced in response to a change in the diameter of the can lid, the can is rotated by the handwheel 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 a gap is formed between the seaming lever 14 and the seat plate 38, the bolt 31 is loosened. At the same time, rotate the lever 36 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 hand and pull downward, the seaming lever 14
And the seaming chuck 13 are integrally connected by the connection bracket 27, so that 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 attach a seaming lever and a seaming chuck to which a seaming roll of a changed size is mounted, the spline of the seaming lever 14 is connected to the seaming roll shaft 15 because the spline diameter is the same as the previous one. After pushing the splines of the seaming chuck 13 into the splines 22 of the rotary cylinder 21 into the splines 15a, the bolts 31 are tightened to stop the seaming chuck 13, and the lever 36 is turned.
The cam 35 is inserted into the notch groove of the seaming roll shaft, the seaming lever 14 is fixed to the seaming roll shaft 15, and the mounting is completed by removing the pressing force from the upper end of the coaxial 15.

[0006]

As described above, when changing the size of a can in the prior art can seamer, the can changing operation uses a manual handle to rotate the winding mechanism, and also requires replacement of the seaming roll. Since the upper end of the seaming roll shaft has to be held down by a hand tool, there is a drawback that it takes much labor and time. In view of the above, the present invention is to automatically perform positioning of the seaming roll shaft at the time of seaming roll replacement, and to allow the upper end of the seaming roll shaft to be pressed by a pneumatic actuator, thereby replacing the seaming roll. And to solve the above-mentioned conventional problems.

[0007]

SUMMARY OF THE INVENTION For this reason, the present invention provides a plurality of can winding mechanisms arranged at equal pitches on a circumference at an equal distance from a vertical center axis. A can base that pushes 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 swings on a seaming roll shaft that is different from the seaming chuck. Equipped with two sets of seaming rolls, the can covered with a can lid fed in time by a conveyor is gripped by the can pedestal and the seaming chuck and rotated vertically and equidistant from the center axis. While being transferred on the circumference, the upper edge of the can and the can lid are wrapped by the seaming roll, and in the can changer in the can seamer to be sent out to the next step, the same type changing apparatus is , Seaminglo A control mechanism capable of detecting the rotation angle of the screw shaft, controlling the drive motor to stop the can winding mechanism at a predetermined position, and then sending the can winding mechanism arbitrarily one pitch at a time. Mounted on the Cima body frame,
An actuator capable of pushing down the upper end of the seaming roll shaft at one position where the can winding mechanism stops is provided as means for solving the problem.

[0008]

[Function] At the time of changing the size of a can in a can seamer, as a means for rotating a winding mechanism, a detector for detecting a position of a rotation angle of a rotation center axis (vertical axis) of the mechanism and a can seamer. A control device that combines a drive motor and a manual switch of the motor stops the drive motor when each winding mechanism reaches a predetermined position on the frame of the can seamer body, and stops the winding mechanism. Thereafter, when the manual switch is pressed, the winding mechanism moves by one pitch and stops again. At a predetermined position of the frame of the can seamer main body, a compressed air operated actuator is attached, which operates so as to press the upper end of the seaming roll shaft of the stopped tightening mechanism, thereby performing the work of replacing the seaming roll. make it easier.

[0009]

FIG. 1 is a vertical sectional view of a whole rotary mechanism of a rotary can seamer according to an embodiment of the present invention, and FIGS. It is explanatory drawing of the principal part. Also, the general can-seamer winding mechanism has been described with reference to FIGS. 5 to 7 showing the prior art. However, in the embodiment of FIG. 1 of the present invention, the winding mechanism is not different from the above-described conventional technique. Will be omitted, and points different from FIGS. 5 to 7 will be described.

In FIG. 1 to FIG. 4, reference numeral 7 denotes a vertical center axis of the can seamer, and a rotary frame 19 integrated with a concentric cylinder axis is freely fitted on the center axis 7 with the vertical center axis 7. The rotary frame 19 is rotated in the direction of arrow X, and a plurality of winding mechanisms are arranged on the same circumference at the same pitch. Further, the vertical center shaft 7 rotates in the opposite direction to the rotary frame 19, that is, in the direction of arrow Y to rotate the seaming chuck 13 on the rotary frame 19 and the can table 9
And the can 8 is rotated at high speed in the direction of arrow Z. The main body frame 42 is a fixed frame,
2, a cam groove 42a and a through hole 42b are provided. 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 rotation 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 a bevel gear 46 attached to the upper end of the central shaft to the small bevel gear 47, and transmitted from the axis of the small bevel gear 47 to the rotation position sensor 49 via a direct coupling 48.

FIG. 2 shows the structure of the rotational position sensor 49, which is provided with a disk 51.
The rotation transmitted from the small bevel gear 47 causes the disc 51 to rotate.
Is designed to rotate. A groove 51a or a projection is provided on the outer periphery of the disk 51 at equal intervals, and a proximity sensor 52 that can adjust a mounting angle along the outer periphery of the disk 51,
The groove 51a or the protrusion of the disk 51 can be detected. If the can seamer is 12 pieces (having 12 sets of can winding mechanisms), the rotation speed of the rotary frame 19 and the rotation speed of the vertical center shaft 7 are the same, and the gear ratio of the bevel gear 46 and the small bevel gear 47 is 3 : 1
The pitch of the can winding mechanism can be adjusted by providing four grooves 51a or protrusions of the disk 51 at equal circumferential intervals. The same operation effect can be obtained by using the structure of the position sensor 55 shown in FIG. 3 instead of the rotation position sensor 49. That is, the position sensor 55 is mounted 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, the operation of attaching and detaching the seaming lever to and from the seaming roll shaft will be described. When the control mode of the drive motor (not shown) is switched to model change, each time the operation button is pressed, the drive motor is rotated by the can winding mechanism. Is moved by one pitch to stop at a predetermined position. At the stopped position, the operating rod of the pneumatic actuator 45 is operated to push the upper end 15 b of the seaming roll shaft 15 against the urging force of the compression spring 43.
Depressing Te, omission force pushing the seaming lever 14 a gap upward between the seat plate 38 of the upper surface of the lower surface and the seaming lever 14 of the rotary frame 19, Les
Turn bar 36 to cut groove of seaming roll shaft 15
The engaged cam 35 is removed, and the seaming chuck 13 is removed.
Loosen the bolts 31 with the seaming chuck 13
Move the seaming lever 14 from the seaming roll shaft 15
It can be easily extracted. Next, the replacement seaming chuck is inserted into the spline 22 and fastened with the bolt 31, and the replacement seaming lever is fitted into the seaming roll shaft 15 and stopped by the cam 35. Next, the operation rod of the pneumatic actuator 45 is pulled up, and the operation button is pressed to move to the next type change operation. The operation is exactly the same for the position sensor 55 of FIG.

[0013]

As described above in detail, according to the present invention, the seaming roll shaft can be automatically held down by the pneumatic actuator in the can seamer changing operation. An excellent effect is obtained such that the number of hands and time can be remarkably reduced as compared with the case where the seaming roll shaft is pressed by the turning hand tool.

[Brief description of the drawings]

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

FIG. 2 is a structural diagram of a rotational 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 near a conventional seaming roll axis.

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 longitudinal sectional view of a conventional winding mechanism.

[Explanation of symbols]

 7 vertical center axis 8 can 9 can base 11, 12 seaming roll 13 seaming chuck 14 seaming lever 15 seaming roll shaft 42 body frame 45 pneumatic actuator 49 rotation position sensor 55 position sensor

──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Hirofumi Ito 1 Nagoya Equipment Works, Nagoya City No. 1 Mitsuhishi Heavy Industries, Ltd. Nagoya Kiki Seisakusho Co., Ltd. (72) Inventor Masamitsu Takahara 60-1 Kutsubo, Iwazuka-cho, Nakamura-ku, Nagoya-shi Nakanishi Engineering Co., Ltd. (56) References JP-A-1-254332 ( JP, A) JP-A-2-238345 (JP, A) JP-A-2-1532 (JP, U) JP-A-2-48101 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , (DB name) B21D 51/32 B21D 37/04

Claims (1)

(57) [Claims] 1. A plurality of can winding mechanisms arranged at equal pitches on a circumference equidistant from a vertical center axis, wherein the can winding mechanism rotates and pushes up a lower part of the can while rotating. The conveyor is equipped with a seaming chuck that supports the can lid from above while rotating in the same direction and the same direction as the can base, and two sets of seaming rolls that swing on a different seaming roll axis from the seaming chuck. While the can covered with the can lid sent at the same timing is gripped by the can pedestal and the seaming chuck and rotated vertically while being sent on the circumference equidistant from the center axis. , The upper edge of the can and the can lid are wound up by the seaming roll and sent to the next step in the can changer in the can seamer. The same type changing device detects the rotation angle of the seaming roll shaft. And drive mode After the can-winding mechanism is stopped at a predetermined position by controlling the can-winding mechanism, a control mechanism that can arbitrarily feed the can-winding mechanism one pitch at a time, type sorter cans Cima, characterized in that in one office clamping mechanism stop position becomes an actuator that can be pushed down the upper end of the Shiminguro spool shaft.