JPH02221020A - Can cover planetary rotating device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a can lid planetary rotating device used for automatic multi-item inspection of can lids such as damage and dimensional errors. Concerning improvements to increase accuracy.

``Prior Art'' This type of can lid planetary rotating device includes a turntable that is intermittently rotated, and can lid mounting stands that are arranged at equal intervals around the outer circumference of the turntable and rotate on their own axis. Then, after placing the can lids supplied from the previous process on the above-mentioned mounting table and centering them, each mounting table is rotated and the turntable is intermittently rotated, so that the can lids are placed around the turntable. Can lids are sequentially inspected for scratches and dimensional errors using inspection equipment.

Incidentally, in conventional devices, the can lid mounting table has a structure as shown in FIG. 6 or 7.

First, in the device shown in FIG. 6, a convex part IA is formed on the top surface of the mounting table l, and the convex part IA fits tightly into the concave part KA on the back surface of the can lid (on the opposite side from the ring R). Perform centering.

On the other hand, in the apparatus shown in FIG. 7, two convex portions are formed on the upper surface of the mounting table 2, into which the recesses KB on the front side of the can lid fit without any gaps, and the can lid K is turned over and placed on the mounting table 2 for alignment. It is configured to do so.

"Problem that the invention attempts to solve" However, in all of the above conventional devices, the convex portion IA.

Since the configuration uses 2A to center the can lid, in order to obtain sufficient accuracy, these convex portions IA.

2A must be formed to a size that closely contacts the peripheral wall surfaces of the recesses KA and KB. However, setting such exact dimensions increases the precision required for placing the can lid K on the mounting table 1.2, which has the disadvantage of making it difficult to supply the can lid to the mounting table 1.2. .

For this reason, it is difficult to increase the accuracy of centering can lids during inspection beyond the current level, and it is becoming impossible to keep up with recent improvements in accuracy.

Furthermore, with the configuration in which the can lid K is placed upside down as shown in Figure 7, it is not possible to confirm the fixation state of the ring R, which is one of the important inspection items, and a separate inspection must be performed for this purpose. , it was inefficient.

"Means for Solving the Problems" The present invention has been made to solve the above-mentioned problems, and the projections formed on the outer periphery of the back surface of the can lids are arranged on the top surface of the can lid mounting table so that they overlap along the entire length. It is characterized by forming a positioning groove with a V-shaped cross section into which it fits, and also forming a ventilation path whose one end communicates with the upper surface of the can lid mounting table and whose other end is connected to an air intake source.

"Function" In this can lid planetary rotating device, the protrusion on the back side of the can lid is fitted into the positioning groove with a V-shaped cross section formed on the top surface of the mounting table, and air is sucked from the top surface of the mounting table. As a result, the can lid is attracted toward the mounting table, and this suction force causes the protrusions to slide along the side surfaces of the positioning grooves, thereby correcting misalignment of the protrusions along the entire circumference. Therefore, even if the placement accuracy of the can lid during supply is somewhat poor, the center of the can lid can be accurately aligned, and quality inspection etc. can be performed with high accuracy.

Embodiment FIGS. 1 and 2 are a longitudinal sectional view and a plan view showing an embodiment of a can lid planetary rotating device according to the present invention.

Reference numeral 10 in the figure is a rotating body that is intermittently rotated horizontally by a drive source (not shown), and a rotating shaft 11 is fixed upright at the center of the upper surface of this rotating body 10. A disc-shaped turntable 12 is horizontally fixed to the center of the rotating shaft 11, and cylindrical shafts 13 are vertically fixed to the outer circumference at equal intervals in the circumferential direction (eight in this case). Pulleys 15 are rotatably attached to these cylindrical shafts 13 via bearings 14. As shown in FIG. 2, a belt 16 is wound around these pulleys 15 and is driven by a drive pulley 17.
are rotated in the same direction.

Further, an annular mounting ring (mounting table) 18 is fixed to the upper surface of each pulley 15, and a resin-made annular plate 19 is fitted into the inner peripheral side of the ring. On the upper surface of the outer periphery of the mounting ring 18, as shown in FIG.
Positioning of V-shaped cross section where C fits into each other around the entire circumference @20
is formed. The width of this positioning groove 20 is the protrusion KC.
The width of the groove KC is larger than the width of the groove KC, and the angles formed between the two side surfaces thereof and the vertical line are equal to each other, and the center line of the positioning groove 20 and the center line of the protrusion KC are aligned in the vertical direction. In addition, positioning groove 2
It is desirable that the cross-sectional angle of the number 7 is 70 to 100 degrees. If it is less than 70 degrees, the width of the groove 20 becomes smaller and the can lid K
Precision is required when installing the centering point, and if the centering angle is extremely larger than 100°, it is difficult to obtain sufficient centering accuracy.

On the other hand, an annular plate-shaped sliding plate 21 is fixed to the lower surface of the turntable 12, and vent holes 22 are formed in this sliding plate 21 at positions corresponding to each cylindrical shaft 13. Also, inside the turntable 12, there are vent holes 2 that are paired with each other.
2 and the cylindrical shaft 13 are respectively formed. Further, at the upper end of the rotating shaft 11, a circular top plate 24 is provided at approximately the same height as the mounting ring 17.
is fixed horizontally.

On the other hand, a base 25 is arranged horizontally surrounding the rotating shaft 11, and guide bars 27 are vertically slidable on the periphery of the opening of the base 25 at intervals in the circumferential direction via mounting members 26. A ventilation plate 29 is attached vertically to the upper ends of these guide bars 27 and is fixed to the lower surface of the sliding plate 21 via a support plate 28 . Further, a spring 30 is attached to the outer periphery of each guide bar 27, and these springs 30 move the ventilation plate 29 toward the sliding plate 21.
is being forced to.

As shown in FIG. 5, the ventilation plate 29 has a C-shape that overlaps the sliding plate 21 over its entire length, and C-shaped ventilation grooves 31 are formed on its upper surface over its entire length. There is. This ventilation groove 31 communicates with all the ventilation ports 22 except those located at the can lid supply position P1 and the discharge position P2.

Further, holes 32 are formed in the ventilation plate 29 and communicate with two positions at the bottom of the ventilation groove 31, and one end of an intake pipe 34 is connected to each of these holes 32 by a connecting member 33. The other end of this intake pipe 34 is connected to an intake source (not shown).

In the apparatus having the above configuration, the turntable 12
While rotating intermittently, the can lid K is positioned and placed on the mounting ring 18 which is stopped at the can lid supply position PI, and the protrusion KC is fitted into the positioning groove 20. At this point, the protrusion K
It is not necessary for C to be located precisely at the center of the positioning groove 20, and the supply to the can lid may be performed with relatively rough precision.

Next, when the turntable 12 rotates and the mounting ring 18 on which the can lid K is placed comes to the position P2, the ventilation hole 22 of the sliding plate 21 communicates with the ventilation groove 31 of the ventilation plate 29, and the ventilation path 23
The can lid K is sucked through the cylindrical shaft 13. Therefore, even if there is a slight deviation in the state of placement on the can lid, the protrusion KC moves along the side surface of the positioning groove 20 and the deviation is corrected along the entire circumference, so that the can lid is accurately placed. centered on. At the same time, the belt 16 hits the pulley 15 and rotates the can lid K.

Next, at positions P2 to P8, various inspection devices (not shown) inspect the can lid for external dimensions, ring fixation status, presence of external damage, etc., and then the can lid is transferred to the next process by an ejection device at position P8. be transported.

In this way, with this device, even if the positional accuracy when supplying to the can lid is somewhat poor, the positioning groove 20 formed in the mounting ring 18 and the function of the suction mechanism make it possible to accurately locate the center of the can lid during inspection. This enables highly accurate measurements. Furthermore, since the can lid is placed face up on the mounting ring 18, the ring R on the surface can be easily inspected. Furthermore, in the above embodiment, the sliding plate 21 and the ventilation plate 29 prevent air from being taken in from the mounting ring 18 at the supply/discharge position PI, P8, so that the can lid can be supplied from the previous process and the next process is prevented. This has the advantage that the can lid can be discharged smoothly.

Note that the present invention is not limited to the above embodiments, and the detailed structure may be changed as necessary.

"Effects of the Invention" As explained above, in the can lid planetary rotation device according to the present invention, the protrusion on the back surface of the can lid is inserted into the positioning groove having a V-shaped cross section formed on the top surface of the mounting table. They are fitted into each other, and air is taken in from the top of the mounting table. As a result, the can lid is suctioned toward the mounting table, and due to this suction force, the protrusions slide along the side surfaces of the positioning grooves, and their positions are mutually corrected along the entire circumference. Therefore, even if the placement accuracy of the can lid during supply is somewhat poor, the center of the can lid can be accurately aligned, and quality inspection etc. can be performed with high accuracy. Furthermore, since the can lid is placed with its front side facing upward, it has the advantage that rings and the like can be inspected at the same time.

[Brief explanation of the drawing]

1 and 2 are a longitudinal sectional view and a plan view showing an embodiment of a can lid planetary rotating device according to the present invention, and FIGS. 3 and 4 are a longitudinal sectional view and a plan view showing a mounting table of the device. FIG. 5 is a plan view showing the ventilation path of the device. Also,
FIGS. 6 and 7 are schematic diagrams showing the main parts of a conventional can lid planetary rotating device. K...can lid, KC...projection on the back of the can lid, 11...
Rotating shaft, 12... Turntable, 13... Cylindrical shaft, 16... Belt (can lid rotation mechanism), 18... Placement ring (placement stand), 20... Positioning groove, 21...・・・
Sliding plate, 23... Ventilation path, 29... Ventilation plate, 34.
・Intake pipe.

Claims (1)

[Claims] Can lid planetary rotation in which can lid mounting stands are rotatably arranged at intervals in the circumferential direction on the outer periphery of a turntable that is rotated intermittently, and a can lid rotation mechanism that rotates these can lid mounting stands is provided. In the apparatus, a positioning groove having a V-shaped cross section is formed on the upper surface of the can lid mounting table, into which a protrusion formed on the outer periphery of the back surface of the can lid is fitted over the entire length, and one end of the groove is formed on the upper surface of the can lid mounting table. A can lid planetary rotating device characterized in that a ventilation path is formed which communicates with the upper surface of a placing stand and whose other end is connected to an air intake source.