JPH0261860B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to an apparatus for manufacturing easy-open lids that are wrapped around cans, bottle containers, etc., and in particular, a manufacturing technology when a turret method is used to transfer the lids. Regarding.

(Prior art) An easy-open lid manufacturing device using the turret method grips the lid with the gripper of the turret.
By intermittent rotation of the turret, the lid is sequentially transferred to a rivet mold, a score line engraving mold, and a tab crimping mold as press molds.

In this case, each mold is composed of an upper mold and a lower mold, and these upper molds and lower molds are used to press the lid in a predetermined manner, but in the past, the lid was released by opening the gripper. Each press work was performed in the same condition.

(Problem to be Solved by the Invention) However, if the gripper is released from gripping the lid after each pressing process as in the past, gripping during transfer and releasing during pressing are repeated, so that the gripping position of the lid gradually changes. There was a problem that misalignment occurred, making it impossible to perform press processing at an accurate position.

(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, the present invention has a gripper that grips the lid in a fixed manner. It has a turret that is equally spaced radially for each installation angle and rotates intermittently for each installation angle of the gripper, and a press mold is placed at the stop position of the gripper as the turret rotates intermittently. In an easy-open lid manufacturing device, at least a rivet molding mold for forming a rivet on the lid, a score line engraving mold for engraving a score line on the lid, and a tab crimping mold for crimping a tab on the rivet of the lid are arranged in this order. , supports the gripper so as to be movable up and down, urges the gripper upwardly with a spring to hold it in the raised position, and has an upper die of each press die between the gripper and the upper die of each of the press molds. A pressing means is provided for pressing down the gripper along with the lowering movement.

(Function) Therefore, in the manufacturing apparatus of the present invention, when the upper die of each press type moves downward during press working, the gripper moves downward together against the spring through the pressing means, so that the lid cannot be closed. While being gripped by the gripper, it can be lowered together with the upper mold to perform a predetermined pressing process between it and the lower mold.

In addition, when the upper mold is raised after the pressing process is finished, the grippers are biased by the spring and rise while gripping the lid, so the lid is always gripped by the grippers, and once the lid is gripped by the grippers, The gripping position can be kept constant until the processing by each press die is completed.

(Example) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

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 processes such as rivet forming, score line engraving, and tab caulking, and finally the fourth
This is a device for manufacturing an easy-open lid E as shown in the figure, which includes a turret 1, a gripper 2, a primary rivet mold 3 as a press mold, a secondary rivet mold 4, and a score line engraving device. Type 5, tab temporary caulking type 6, tab final caulking type 7,
The main components are:

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 example, the stop positions are set at the supply station a of the lid B, the primary forming station b of the rivet, the secondary forming station c of the rivet, the engraving station d of the score line, and the station d of 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. The gripper 2 has a mounting structure in which a ball spline shaft 12 is erected on the outer peripheral edge of a disc 11, and a boss portion 23 is attached to the shaft 12.
are fitted so that they can be slid up and down, and are urged upward by the spring 24 to hold the gripper 2 in the raised position, and this raised position is used as the intermittent rotation position to move the lid B to be gripped to the pass line. It is structured to be transported on L.

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.
The lower die 32 is aligned with the frame 8 so that the
The upper die 34 is fixed to one side of the press slide 35 via a holder.

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 shape retaining pin 55 and a shape retaining hole 56 are formed in the engraving die 5, and at the same time as the score line 50 is being engraved, a shape retaining pin 55 and a shape retaining 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 an upper die 65 is fixed to one side of the press slide 66 via a holder.

The tab final crimping die 7 is disposed at the final crimping station f, and is used here to firmly swam the tab 60 temporarily crimped by the temporary crimping station e to the secondary rivet 40 of the lid B. It is composed of a lower mold 72 having a rivet pin 71 protruding thereon, 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, each of the press slides 35, 54, 6 described above
6 are divided into separate bodies, and are moved up and down independently by crank mechanisms 82 each having an eccentric wheel 81.

Further, between each upper mold of each of the press molds and the gripper 2, there is a secondary mold 4 shown in FIG. 10 as an example.
As shown in the figure, the gripper 2
A pressing means for pressing down is provided,
In this case, a pressing arm 95 is extended from the upper mold 44, and a pressing surface 96 is formed on the upper surface of the boss portion 23 of the gripper 2, and the pressing surface 96 is pressed by the pressing arm 95 to push down the gripper 2. It is used as a pressing means.

Moreover, the distance T between the pressing arm 95 and the pressing surface 96 is
The distance between the upper mold 44 and the lid B is set to be the same, and the upper mold 4
4 descends and the pressing arm 95 contacts the pressing surface 96, and at the same time the upper mold 44 contacts the lid B. In this state, the upper mold 44 further lowers and presses the lid B in a predetermined manner with the upper mold 44 and the lower mold 42. I am trying to process it.

In Fig. 3, 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 is taken out from the discharge station g as an easy-open lid E.

In this case, the lower end of each upper die of each press die is connected to the claw of the gripper 2 that grips the lid B on the pass line L when the turret 1 rotates, as in the example of the secondary forming die 4 in FIG. It is held at a position above the upper ends of 20 and 22, and when the turret 1 stops and the lid B is positioned at the secondary forming station c, it begins to descend, and at the time of its descent, the pressing surface 96 is pressed by the pressing arm 95, respectively. 11, the gripper 2 is pushed down against the spring 24, and as shown in FIG. It will be processed.

Further, when the press working by the mold 44 and the lower mold 42 is finished and the upper mold 44 is raised, the gripper 2 is also raised by the spring 24 while gripping the lid B, and the turret is raised while being held at the raised position. The intermittent rotation of 1 moves the pass line L to the next step, where a predetermined process is performed using the same operation as described above.

Therefore, in the manufacturing apparatus A of this embodiment, from the time when the lid B is gripped by the gripper 2 at the supply station a until the lid B is discharged from the discharge station g after passing through a predetermined pressing process, the lid B is always The lid B remains gripped by the gripper 2, and the gripping position of the lid B once gripped by the gripper 2 never shifts during the manufacturing process.

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 may be performed in one process.Also, although the tab coil method was used to supply 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, a pressing means is provided for pressing down the gripper together with the lowering movement of the upper die of each press die, so that press processing is possible. At this time, in synchronization with the lowering movement of the upper mold, the lid is lowered while being gripped by the gripper until it touches the lower mold, and at the same time, while it is being gripped, the prescribed pressing is performed with the lower mold and the upper mold. be able to.

Also, when the press work is finished and the upper mold is raised,
The gripper is also biased by the spring and rises.
Since the lid is held in its raised position, it remains gripped by the gripper during the transfer process by the turret, and there is no possibility that the gripping position will shift, allowing accurate machining to be carried out in the correct position. can be applied.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a turret of a manufacturing apparatus according to an embodiment of the present invention, FIG. 2 is a plan view of the turret,
FIG. 3 is an overall perspective view of the device of this embodiment, FIG. 4 is a plan view of an easy-open lid manufactured by the device of this embodiment, and FIG. 5 is a cross-sectional view showing a primary forming mold for a rivet of the device of this embodiment. FIG. 6 is a sectional view showing a secondary forming mold for rivets of the device of this embodiment, FIG. 7 is a sectional view of a score line engraving mold of the device of this embodiment, and FIG. 8 is a tab of the device of this embodiment. A cross-sectional view showing a temporary caulking mold of
FIG. 9 is a cross-sectional view showing the final crimping type of the tab of the device of this embodiment, and FIGS. 10 and 11 are explanatory views of the operation of the device of this embodiment. 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 type), 6... Temporary crimping type (tab crimping type), 7... Real crimping type (tab crimping type), 24... Spring, 95...
Pressing arm (pressing means), 96...pressing surface (pressing means).

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 during movement, there are at least a rivet molding mold for molding a rivet on the lid, a score line engraving mold for carving a score line on the lid, and a tab caulking mold for caulking the tab onto the rivet on the lid. In the easy-open lid manufacturing apparatus, the gripper is supported so as to be movable up and down, and the gripper is urged upward by a spring to be held in a raised position, and the gripper and the mold are arranged in order. An apparatus for producing an easy-open lid, characterized in that a pressing means is provided between the upper molds of each press mold to press down a gripper along with the lowering movement of each upper mold.