JPH0261859B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an apparatus for manufacturing an easy-open lid that is fastened to a can container, a bottle container, etc. This invention relates to a manufacturing technique when a turret-type lid transfer means is used to manufacture lids.

(Prior Art) As an easy-open lid manufacturing apparatus using a turret method, the one shown in FIG. 10 is conventionally known.

This conventional device M grips a lid 102 with a gripper 101 of a turret 100.
The lid 102 is sequentially transferred to a rivet molding mold, a score line engraving mold, and a tab crimping mold as press molds by intermittent rotation of the lid 102.

This device M is formed so that it can be applied to lids of various sizes (diameters) by exchanging the gripper 101. The position was set to match the top.

The turret pitch circle is a circle with a design-specific diameter, and lids of various sizes were positioned so that the center of the lid was on this pitch circle.

(Problem to be Solved by the Invention) However, if the size (diameter) of the lid differs, the distance from the center of the lid to the rivet forming position where the tab is caulked will also differ.
In the conventional structure in which the center 103 of the lid is aligned with the pitch circle 104 of the turret, if the size of the lid differs, the position of the rivet will be different for each lid. There was a problem in that the replacement required a great deal of effort and time, resulting in extremely low work efficiency.

(Means for Solving the Problems) The present invention has been made for the purpose of solving the above-mentioned problems, and in order to achieve this purpose, in the present invention, the gripper that grips the lid has a certain It has a turret that is equally spaced radially for each installation angle and rotates intermittently for each installation angle of the gripper, and at least the lid is located at the stop position of the gripper as the turret rotates intermittently. The easy-open lid is equipped with a rivet molding mold that molds rivets in off-center locations, a score line engraving mold that engraves score lines on the lid, and a tab crimping mold that crimps a tab onto the rivet on the lid. The manufacturing apparatus was set so that the center of the rivet forming of the lid coincided with the pitch circle of the turret.

(Function) In the manufacturing apparatus of the present invention, the center of rivet forming of each lid is aligned with the pitch circle of the turret, so the center of rivet forming of each lid is set at the same position regardless of the size of the lid. become.

Therefore, the rivet molding mold and the tab caulking mold can be used in common for each lid, and the trouble of replacing these molds every time the size of the lid is changed can be omitted.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to FIGS. 1 to 9.

In this embodiment, an apparatus for manufacturing a full-open type easy-open lid will be described as an example.

Easy-open lid manufacturing apparatus A of this embodiment
In the process of intermittently transporting the lid B by the turret 1, the lid B is subjected to various pressing processes such as rivet forming, score line engraving, and tab caulking, and finally an easy press as shown in Fig. 3 is applied to the lid B. This is a device for manufacturing an open lid E, which includes a turret 1, a gripper 2, a rivet primary mold 3 as a press mold, a rivet secondary mold 4, a score line engraving mold 5, and a tab temporary mold. The main components are a crimping type 6 and a tab crimping type.

The turret 1 is designed to intermittently transfer the lid B gripped by the gripper 2 at every 45 degrees, and has a circular plate attached to the upper end of a vertical shaft 10 which is rotated intermittently at every 45 degrees by an intermittent drive mechanism (not shown). 11 is fixed, and the disk 1
1, eight grippers 2 are arranged radially evenly on the outer periphery of the gripper 1 at an angle of 45 degrees, which is the same as the intermittent rotation angle.

Therefore, this turret 1 has a stopping position for the gripper 2, which is the processing station for the lid B.
In this embodiment, the stop positions are set at the supply station a for the lid B, the primary forming station b for the rivet, the secondary forming station c for the rivet, the station d for engraving the score line, and the station d for the tab. The temporary crimping station e, the tab final crimping station f, and the easy-open lid ejection station g are set in this order.

The gripper 2 grips the lid B between a fixed claw 20 and a clamping claw 22 biased inwardly by a spring 21, and intermittently transports the lid B to each station in sequence. Various sizes are prepared corresponding to the size (diameter) of the lid B, and these are removably attached to the ball spline shaft 12 provided on the disc 11 by a boss portion 23.

Then, the pitch circle P of the turret 1 is set to the circumference on which the largest size of grippers among these grippers of various sizes can be attached without interfering with each other, and each gripper to be gripped by the grippers of various sizes is The rivet forming center C of the lid is
It is set to match on this pitch circle P.

The primary mold 3 for the rivet is disposed at the primary molding station b, and here it molds the primary rivet 30 on the lid B that has been moved from the supply station a in front, and as shown in FIG. It consists of a lower mold 32 in which a molding hole 31 is formed, and an upper mold 34 in which a molding pin 33 is protruded from the lower surface.

This primary mold 3 has a molding hole 31 and a molding pin 3.
A lower die 32 is fixed to the upper surface of the frame 8, and a press slide 35 is fixed to one side of the upper die 34 via a holder so that the rivet forming center C on the pitch circle P is aligned with the center of the rivet forming center C. .

A secondary rivet forming mold 4 is disposed at a secondary forming station c, and here a secondary rivet is placed on the lid B that has been moved from the primary forming station b from above the primary rivet 30 as a final rivet forming process. 40, as shown in FIG.
and an upper mold 44 having a molding hole 43 formed in its lower surface.

In addition, in this secondary mold 4, the lower mold 42 is fixed to the frame 8 so that the molding pins 41 and the molding holes 43 are vertically aligned, similar to the above-described primary molding mold 3.
The upper die 44 is attached to the press slide 3 via the holder.
5 is attached to the other side.

The score line engraving mold 5 is disposed at the engraving station d, and here the above-mentioned secondary forming station c
A score line 50 is engraved along the outer periphery of the lid B, which has been moved from the lid B. As shown in FIG. and an upper die 53.

This engraving die 5 also has a lower die 51 fixed to the upper surface of the frame 8 and an upper die 53 fixed to the press slide 54 via a holder.

Further, in order to prevent the secondary rivet 40 from being deformed when the score line 50 is carved, a formation holding pin 55 and a shape holding hole 56 are formed in the carving die 5, and at the same time as the score line 50 is carved, a formation holding pin 55 and a shape holding hole 56 are formed. , a molding recess 58 and a molding protrusion 59 for molding the recess 57 are formed in the center of the lid B.

The temporary crimping die 6 for the tab is disposed at the temporary crimping station e, and at the same time cuts the tab 60 from the tab coil 60a supplied to the station e, and at the same time cuts off the secondary rivet of the lid B that has been moved from the engraving station d. 40, the cut tab 6
0 is temporarily crimped, and there is a rivet pin 6 on the top surface.
1, a receiving mold 63 for the tab coil 60a, and an upper mold 65 having a caulking pin 64 on its lower surface.

In this temporary caulking mold 6, a lower mold 62 is fixed to the upper surface of the frame 8, and a receiving mold 63 is attached to the lower mold 62.
It is located above the press slide 66 and is fixed to the frame 8 via a bracket (not shown), and a mold 65 is fixed to one side of the press slide 66 via a holder.

The tab final crimping die 7 is disposed in the final crimping station f, and is used here to firmly crimp the tab 60 temporarily crimped by the temporary crimping station e to the secondary rivet 40 of the lid B. It is comprised of a lower mold 72 having a rivet pin 71 protruding from the top thereof, and an upper mold 74 having a hammer 73 formed at its lower end.

In this main crimping die 7, a lower die 72 is fixed to the upper surface of the frame 8, and an upper die 74 is fixed to the other side of the press slide 66 via a holder.

In addition, as mentioned above, each press slide 35, 5
4 and 66 are each divided into separate bodies, and each moves up and down independently by a crank mechanism 82 having an eccentric wheel 81.

Furthermore, when the turret 1 is rotating, the lower end of the upper die of each of the press molds is held at a position above the upper end of the claws 20, 22 of the gripper 2 that grips the lid B on the pass line, and the turret 1 is stopped. When the lid B is positioned at each station, the lid B is lowered, and at the same time, the grippers 2 are pushed down and the lid B is lowered to the level where it contacts the lower mold, and at the same time, the upper mold and the lower mold are used to place the lid B in a predetermined position. We are trying to process it.

In Fig. 2, reference numeral 9 denotes an oil receiving plate, which is disposed above the turret 1 to catch oil dripping from the crank mechanism 82, etc., and prevents the lid B from getting dirty with oil during processing. do.

Next, the operation of this embodiment will be explained.

The lid B supplied to the supply station a is subjected to predetermined processing at each station as the turret 1 rotates intermittently, and finally taken out as an easy-open lid E from the discharge station g.

When this manufacturing apparatus A is applied to lids Ba and Bb of different sizes (diameters), for example, as shown in FIG. 9, grippers 2a and 2b corresponding to the lids Ba and Bb are replaced. However, in this case, even if the sizes of the grippers 2a, 2b are different, the lids Ba, gripped by each gripper 2a, 2b are
Bb is set so that the rivet forming centers Ca and Cb coincide with the pitch circle P of the turret 1, so regardless of the size of the lids Ba and Bb, the rivet forming centers Ca and Cb are located at the same position. is positioned.

Therefore, the rivet primary mold 3, secondary mold 4, which are arranged with the rivet molding center C as a reference,
Temporary crimping type 6 and permanent crimping type 7 have both sizes of lids Ba,
It can be used in common with Bb, and the trouble of replacing it can be omitted.

In addition, regarding the score line engraving mold 5, the size of the score line 50 and the recess 5 are determined according to the size of the lid B.
7 has a different shape, so it is necessary to replace it with one of a predetermined size.

Although the embodiments of the present invention have been described above in detail with reference to the drawings, the specific configuration is not limited to these embodiments, and the present invention may be modified without departing from the gist of the present invention. included.

For example, in the embodiment, a full-open type easy-open lid is used as an example, but the present invention can also be applied to a partial-type easy-open lid.

Further, although the intermittent rotation angle of the turret is set to 45 degrees, it is also possible to have a structure in which 12 grippers are equally spaced every 30 degrees and rotated intermittently every 30 degrees.

Further, in the embodiment, the rivet forming process was made into two steps of primary forming and secondary forming, but the rivet may be formed in one step or three or more steps.

Also, regarding the tab crimping process, we used two steps, a temporary crimping process and a final crimping process, but the crimping process could be performed in one process.Also, although the tab coil method was used for supplying the tabs, it is necessary to prepare the tabs separately in advance. It is also possible to separately produce the parts and supply them one by one.

(Effects of the Invention) As explained above, in the easy-open lid manufacturing apparatus of the present invention, the center of the rivet molding of the lid is aligned with the pitch circle of the turret, so the size of the lid can be adjusted. I have never heard that the position of the rivet changes depending on the size.

As a result, even if the size of the lid changes, the rivet forming position is set at a constant position, and therefore the positions of the rivet forming die and tab crimping die are also fixed, and the rivet forming position is set every time the size of the lid is changed. You can eliminate the troublesome labor of replacing molds and tab crimping molds, and greatly improve work efficiency.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a turret of a manufacturing apparatus according to an embodiment of the present invention, FIG. 2 is an overall perspective view of the apparatus according to the embodiment, and FIG. FIG. 4 is a cross-sectional view showing the primary mold for the rivet of the device of this example, FIG. 5 is a cross-sectional view of the secondary mold for the rivet of the device of this example, and FIG. FIG. 7 is a cross-sectional view showing the temporary swaging mold of the tab of the device of this embodiment, FIG. 8 is a sectional view of the final swaging mold of the tab of the device of this embodiment, and FIG. FIG. 10 is a plan view showing the turret of the conventional device. A...Easy-open lid manufacturing equipment, B...
Lid, E... Easy open lid, 1... Turret, 2... Gripper, 3... Primary mold (rivet mold), 4... Secondary mold (rivet mold), 5... Engraving mold (score line engraving mold), 6...Temporary caulking type (tab caulking type), 7...Final caulking type (tab caulking type), C...Rivet forming center, P...
...Pituchi yen.

Claims (1)

[Scope of Claims] 1 Grippers for gripping the lid are arranged radially evenly at fixed angles, and have a turret that rotates intermittently at each angle of the grippers, and the turret rotates intermittently at each angle. At the stop position of the gripper due to movement, there is a rivet forming die that forms a rivet at least in a location off the center of the lid, a score line engraving die that engraves a score line on the lid, and a tab that forms a tab on the rivet of the lid. An easy-open lid manufacturing apparatus in which a tightening tab and a caulking mold are sequentially arranged, wherein the center of the rivet forming center of the lid is set to coincide with the pitch circle of the turret.