JPH0731873Y2 - Winding thickness monitoring device for can seamer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a device for monitoring a winding thickness of a can seamer.

(Prior Art) A basic structure of a double winding device in a conventional can seamer will be described with reference to FIGS. 4 to 10. The turret 10 is attached to a shaft 11 and rotated by an appropriate drive mechanism (not shown). To be done. Around the turret shown in FIG. 5, several winding chucks 12 are arranged at equal intervals. Two of them are shown in FIG. This chuck 12
Cooperates with a pressing foot plate (not shown) to hold and drive the can body and the can end for the tightening work, and when rotating with the turret, it rotates about its own axis as is well known. it can. And these two chucks 12 have two sets of rolls, namely a first working roll 13 and a second working roll, respectively.
Together with 14 make up two tightening locations. Further, each of the rolls has a support lever (arm) 16, which extends from the winding shafts 18, 19.
It is rotatable on a shaft 15 held by 17, and the shafts 18, 19
As shown in FIG. 4, the bearings are held in the outer shaft bodies 20, 21 fixed to the turret 10.

Further, as shown in FIGS. 4 and 6, the upper ends of the shafts 18 and 19 are the arms 2
A follower 24 is rotatably attached to a shaft 25, which holds 2, 23 and is attached to the ends of the arms 22, 23. Arms 22 and 23 are
The follower 24 is placed at a position where it can be brought into contact with the cam paths 26, 27 on the cam ring 28, and the follower 24 is provided with a spring 29 placed between the receivers 31, 32 on the outer body and the projections 33, 34 on the arm. , 30 keep contact with the camway. And of these, the upper camway 26 is the first
It controls the working roll 13 and the lower cam path 27 is the second working roll.
Control 14

Also, the cam ring 28 is fixed to the off-axis body, so that when the turret rotates, the follower 24 moves along each cam path, and the shape of the cam path is such that when the chuck 12 and the rolls 13 and 14 rotate with the turret. It is designed so that the tightening work can proceed according to the required order. When the follower 24 rides in the recess or base of the camway, the rolls are in the retracted position, i.e., the position away from their respective chucks. Also follower 24
When is on the chevron chevron, the rolls are rotated toward the chuck 12 by the respective shafts 18,19. Further follower 24
As the roll moves along the highest chevron of the camway, the respective rolls 13, 14 are adjusted to the length of the chevron line and the turret 10.
Each chuck 12 for a time determined by the angular velocity of
Is held in the expected tightening position for.

Next, the detailed structure of the cam path 26 will be described. Cam way 26
As shown clearly in FIG. 8, the upper first operating track 42
And a lower second operation track 44. First operation trajectory
42 has a radially outwardly projecting lobe 46, while the second operating track 44 has a radially projecting lobe 48.

Next, referring to FIG. 7 to FIG. 10, this is the second
The dwell portion of lobe 48 only in the area of the operating trajectory 44
10 shows a modification of the cam path 26 in the area 50 (FIG. 9). Further, as clearly shown in FIGS. 8 to 10, the cam path 26 is provided with a saw (SAW) slit 52, and further, a radial inner surface 54 of the cam path 26 is provided with a pair of notches. That is, the recesses 56 and 58 are formed. Machined notch 56
A strain gauge R1 elongated in the circumferential direction of the cam is attached to the inner wall surface of the, and a strain gauge R2 is attached to the inner surface of the notch 56. The strain gauge R2 is elongated vertically and is
As clearly shown in the figure, it is arranged in radial alignment with the strain gauge R1.

On the other hand, a similar set of strain gauges R3 and R4 is attached to the inner surface of the machined notch 58, and the strain gauge R3 generally matches the strain gauge R2 and is elongated in the axial direction. On the other hand, the strain gauge R4 generally matches the strain gauge R1 and is elongated in the circumferential direction. The strain gauges R1 and R4 are the high dwell part of the second operation track 44.
It is distorted by the deflection of 50, and similarly strain gauge R2
And R3 are also partially distorted by the high deflection of the dwell portion 50.

In the above structure, the second seam forming operation track of the cam is provided with the sensor for displaying the load or the force applied in the second seam forming operation for directly displaying the sealing property of the double seam, and the cam track is used. The carried sensor is connected to a monitor system that indicates that a large and / or small force is being applied, which monitor system prints when a high or low force condition occurs. And a printer that identifies the failed station of the seam former, and a fault storage device that can be set to identify an unacceptable number of faults.

(Problems to be solved by the invention) However, in the above-mentioned conventional double tightening device, since the number of strain gauges is large and the number of amplifiers thereof is also large, the signal processing becomes complicated and the stress applied to the cam is measured. However, in order to obtain a fine deflection, it is necessary to weaken the cam, but this has a limit, and thus it is difficult to measure the fine deflection.

The present invention solves the above-mentioned conventional problems by arranging a linear sensor in the fixed part, constantly monitoring the displacement of the seaming lever of the second working roll, and issuing an alarm to those that deviate from the set value. It is what

(Means for Solving the Problems) Therefore, the present invention is directed to an iron piece attached to a support lever of a second working roll of a can seamer and a linear sensor arranged at a fixed portion outside the turret and measuring a distance to the iron piece. When,
A comparison circuit that compares the output signal from the linear sensor with a preset allowable value of the winding tightening thickness, an identification unit that identifies the identification number of the lifter body, a signal from the linear sensor, and an identification signal from the identification unit. And a display circuit for displaying the output from the comparison circuit and the count circuit, which is a means for solving the problem.

(Operation) When the can comes to the working position of the second working roll and is wound, the supporting lever is displaced according to the winding thickness, and the iron piece is also displaced. Further, a voltage corresponding to the distance between the iron piece and the linear sensor is generated in the amplifier and is input to the controller. This signal serves as an identification signal for the main body of the can platform lifter. Further, the preset circuit is operated by the setting device which inputs the maximum value and the minimum value of the preset tightening thickness, and the preset allowable value is set in the comparison circuit. The comparison circuit compares the output of the waveform shaping circuit with the preset allowable value, and when the output of the waveform shaping circuit does not reach the preset allowable value, the display circuit is driven to issue an alarm. At this time, the display circuit also displays the identification number of the canister lifter corresponding to the abnormal canister output from the counting circuit.

(Embodiment) The present invention will be described below with reference to the embodiments of the drawings. Figs. 1 to 3 show an embodiment of the present invention. In the figure, 12 is a winding chuck, 13 and 14 are first and second working rolls, and 16 and 17 are support levers, respectively, which are the same as those of the conventional device shown in FIGS. 4 to 6. Therefore, a detailed description thereof will be omitted here, and only a difference from the related art will be described. Now, the linear sensor 121 is arranged at a fixed portion of the second working roll 14 of the can seamer at the working position, and the iron piece 124 is attached to the support lever 17 of the second working roll 14.

The output from the linear sensor 121 is input to the amplifier 121A,
The output of the amplifier 121A is input to the controller 123. Reference numeral 102 denotes a lifter plate on which the can 101 is placed. Further, when monitoring, in order to determine the number of the canned plate winding thickness, the proximity switch 122 that detects the detection plate 160 attached to the lifter body 115 that moves up and down by the cam 116 is arranged on the fixed cover 161. There is. The signal from the proximity switch 122 is also input to the controller 123 and controlled. Controller 123
The waveform shaping circuits 150 and 151, the count circuit 152, the preset circuit 153, the comparison circuit 154, the display circuit 155, and the winding thickness allowable value setting device 156 are included.

Next, the operation of the winding thickness monitoring device of the embodiment configured as described above will be explained.
When the can comes to the operating position and is wound and tightened, the support lever 17 is displaced according to the winding thickness, and the iron piece 124 is also displaced. A voltage corresponding to the distance between the iron piece 124 and the linear sensor 121 is generated in the amplifier 121A and is input to the controller 123. On the other hand, the proximity switch 122 inputs a passage signal to the controller 123 when the lifter main body 115 at the head approaches. This signal is waveform-shaped by the waveform shaping circuit 150 and then input to the count circuit 152, which serves as an identification signal for the lifter body 115. The output of the amplifier 121A is waveform-shaped by the waveform shaping circuit 151, and then input to the count circuit 152 and the comparison circuit 154.

Furthermore, the maximum value T1 and the minimum value T2 of the preset allowable value of the winding tightening thickness
The preset circuit 153 is actuated by the setting device 156 for inputting, and the preset allowable value is set in the comparison circuit 154.

Further, in the comparison circuit 154, the output of the waveform shaping circuit 151 is compared with the preset allowable value, and if the output of the waveform shaping circuit 151 does not reach the preset allowable value, the display circuit 155 is driven to issue an alarm. At this time, the display circuit 155 also displays the identification number of the lifter main body 115 corresponding to the abnormal can stand output from the count circuit 152. Further, by adding the data processing function as described above to the controller 123, it is possible to manage the winding thickness of each seaming head.

(Effect of the Invention) Since the present invention is configured as described in detail above,
The iron piece fixed to the support lever of the second working roll and the linear sensor enable monitoring of the winding thickness, which makes signal processing extremely simple. Further, the present invention has an advantage that it is possible to monitor the abnormality of the winding tightening thickness without changing the structure of the seamer.

[Brief description of drawings]

FIG. 1 is a plan view showing a winding thickness monitoring device for a can seamer showing an embodiment of the present invention, FIG. 2 is a front view of the same monitoring device, and FIG. 3 is a monitoring device showing an embodiment of the present invention. Is a block diagram of FIG. 4, FIG. 4 is a partial sectional front view of a conventional can seamer winding tightening portion, FIG. 5 is a view taken along arrows V-V in FIG. 4, and FIG. 6 is a view taken along arrows VI-VI in FIG. Fig. 7 is a detailed plan view of the cam passage shown in Fig. 4, and Fig. 8 is VIII to VIII of Fig. 7.
A sectional view, FIG. 9 is an enlarged sectional view taken along line IX-IX in FIG. 8, and FIG. 10 is a view taken in the direction of arrow X in FIG. Description of main parts of the drawing 12 …… Winding chuck, 13 …… 1st working roll 14 …… 2nd working roll, 16, 17 …… Support lever 101 …… Can, 102 …… Lifter plate 115 …… Lifter body , 116 ...... Cam 121 ...... Linear sensor, 122 ...... Proximity switch 124 ...... Iron piece, 152 …… Count circuit 154 …… Comparison circuit, 155 …… Display circuit 156 …… Rolling thickness setting device, 160 …… Detection plate

Continuation of the front page (72) Hideo Takahashi, 1500, Suganuma, Oyama-cho, Suna-gun, Shizuoka Prefecture Inside the Aluminum Can Development Center, Mitsubishi Metals Corporation (56) Reference JP-A-63-295314 (JP, A) JP-A-58 -68609 (JP, A) Actual Kaihei 1-153382 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. An iron piece attached to a support lever of a second working roll of a can seamer, a linear sensor arranged at a fixed portion outside a turret and measuring a distance to the iron piece, and an output signal from the linear sensor. A comparison circuit for comparing the preset allowable value of the winding thickness, an identification means for identifying the identification number of the lifter body, a signal from the linear sensor and an identification signal from the identification means, and outputs a synchronization signal. And a display circuit that displays the outputs from the comparison circuit and the count circuit, and a monitoring device for a winding thickness of a can seamer.