JPH0122058B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an apparatus for forming and simultaneously bonding a metal tension ring to a container lid.

[Prior art and its problems]

Recently, container lids have become popular in which a tear weakening line is provided on the container lid body that extends from a tear-off tab protruding from the skirt of the container lid all the way to the top surface, and can be easily opened by pulling the tear-off tab. . When opening this type of container lid, it is necessary to apply considerable force to pull up the tear-off tab, so measures are taken to make the tear-off tab longer or attach an appropriate grip to make opening easier. is being measured. However, these measures have the disadvantage that there is considerable waste in preforming the container lid from sheet metal, resulting in an increased cost of the container lid.

In addition, many methods have been proposed in which the gripping piece is constructed separately and connected to the tear-off tab by means such as gluing, riveting, or clamping, but these methods require a lot of effort and time during the process. However, the connection part is fragile, and failures such as breakage occur easily before the package is opened, and the manufacturing cost increases significantly.

In order to overcome this problem, a strip is cut from the end of a thin metal plate and simultaneously curved to form a cylindrical ring with overlapped ends, and the free end of the tear-off tab of the container lid and the cylindrical ring are overlapped. The container lid and the cylindrical ring are positioned so that a portion of the cylindrical ring can be joined to each other, and the circumferential edge of the cylindrical ring is curled in the radial direction to form a ring, and a tear-off tab is wound inside the ring. A method and apparatus for manufacturing a container lid with a metal tension ring, which can be mass-produced at low cost by combining the two, was developed by Vikanders of Sweden, with whom the present applicant has formed a technical alliance.

That is, this type of container lid with a metal tension ring is constructed as shown in FIG. 1, for example. The continuous forming of the container lid is carried out by a pre-forming means for cutting the strip-shaped metal thin plate to form a cylindrical annular pre-formed object, and a pre-forming means for cutting the strip-shaped metal thin plate to form a cylindrical annular pre-formed object, and a pre-forming means for supplying the pre-formed object to a position where it is combined with the container lid tab piece. It basically consists of a molded body supply means, a container lid supply means, and a tension ring forming and joining means for forming a preformed body abutted against a container lid tab piece into a tension ring and simultaneously joining this to the container lid. This can be easily achieved using the following equipment.

In this case, in order to obtain a container lid with a metal tension ring with stable quality at a low cost, a cylindrical pre-formed body is formed at a sufficiently high speed, and this pre-formed body is attached to the container lid tab piece as a tension ring. It is required to mold at a sufficiently high speed and to bond sufficiently firmly.

[Purpose of the invention]

An object of the present invention is to properly position the free end of the tear-off tab of the container lid and a part of the cylindrical ring made of a thin metal plate of the preformed body to overlap, and to adjust the circumferential edge of the cylindrical ring to a radius. Detecting a supply interruption of the container lid or a state in which the tension ring and the container lid are not connected in a device that wraps a tearing tab into the ring and connects the two when forming a ring by curling in a direction, and The object of the present invention is to improve the means for eliminating preforms or tension rings before joining.

[Key points of the invention]

The present invention provides a means for shearing and simultaneously bending strips from the ends of a thin metal plate to form a cylindrical annular preformed body having both ends overlapped, and a free end of a tear-off tab of a container lid and a preformed body. The container lid and the preformed body are positioned so that a portion of the preformed body is overlapped with each other, and the peripheral edge of the preformed body is curled in the radial direction to form a ring. a tension ring forming and joining means for rolling a tear-off tab into the ring and joining the two; and before supplying the preformed body formed by the preformed body forming means to a predetermined position of the tension ring forming and joining means. a container lid supply means for supplying the container lid to a predetermined position on the tension ring forming and joining means; and means for pressurizing and deforming the joint between the container lid and the tension ring to strengthen the connection. A first monitoring means for detecting supply interruption of the container lid is provided in a part thereof, a first removing means for removing the preform is provided in a part of the preform supply means, and the tension ring forming and joining means is provided in a part of the preform supply means. 2nd to eliminate tension rings molded singly into part of the
a second monitoring means for detecting a container lid and a tension ring connected thereto is provided in a part of the container lid transfer means, and the container lid supply means is configured to provide a container lid in the container lid receiving area. The first monitoring means detects that the preformed body is not conveyed, and activates the first removal means to prevent the preformed body from being conveyed to the preformed body receiving area. It is characterized in that the second monitoring means is configured to exclude and monitor tension rings that are incompletely connected to the container lid.

[Embodiments of the invention]

Next, embodiments of the device according to the present invention will be described in detail below with reference to the accompanying drawings.

First, the overall basic structure of the device for forming and joining metal tension rings in container lids according to the present invention will be explained with reference to FIG. That is,
The apparatus of the present invention comprises a preform forming means 10, a preform supplying means 12, a container lid supplying means 14, a tension ring forming and bonding means 16, a container lid transfer means 18, and a bond reinforcing means 20. We are prepared. The functions and operations of each of these means are roughly as follows.

The pre-formed body forming means 10 is a substantially cylindrical shape in which a strip is cut from a strip metal sheet made of chromic acid treated steel, tin plate, aluminum alloy, etc., and simultaneously curved in the longitudinal direction so that both ends overlap each other. An annular preform is formed. Next, the preformed body supply means 12 receives the preformed body formed by the preformed body forming means 10 in the holding areas A and B, conveys it in the direction of the arrow, and carries it out to the preformed body receiving area C. . On the other hand, the container lid supply means 14 receives the container lid in the holding area D, conveys it in the direction of the arrow, and transports the container lid in the container lid receiving area E.
Transport to. Tension ring forming and coupling means 16
In the preformed body receiving area C, the preformed body supplying means 12
The container lid is received from the container lid supply means 14 at the container lid receiving area E, and the container lid tab piece and a part of the preformed product can be mutually superposed. The container lid and the preform are then positioned in a curved area F to form a ring by radially curling the peripheral edge of the preform, and the container lid tab piece is attached to this ring in a tensile ring forming and joining area G. The two are combined together and transported to the discharge area H.

Further, the container lid transfer means 18 is arranged in the discharge area H.
The container lid to which the tension ring is connected is received from the tension ring and connection means 16, conveyed in the direction of the arrow, and delivered to the transfer area I. Then, the bond reinforcing means 20 receives the container lid to which the tension ring is bonded from the container lid transfer means 18 in the transfer zone I, conveys it in the direction of the arrow, and in the pressurized deformation zone J, the container lid tab piece and the tension ring are bonded together. After strengthening the joint by pressurizing and deforming the mutually wrapped joint with the first part,
[see figure], and transported to the delivery area K.

However, in the metal tension ring forming and joining apparatus having the above-described configuration, for example, in the tension ring forming and joining means 16, after receiving the preform in the preform receiving area C, the container lid receiving area E
If the container lid supplying means 14 is not receiving container lids in the container lid holding area D when reaching the container lid holding area D, the preformed body and the container lid cannot be butted, so that the container lid is not supplied to the container lid holding area D, Problems like this occur.

That is, the tension ring forming and coupling means 16
If only the preform is received in , the tension ring is molded alone in the curved region F and the joint region G. In this case, there is no problem with the apparatus itself as the tension ring is formed individually, but the tension ring held by the tension ring forming and coupling means 16 remains as it is without being delivered to the container lid transfer means 18 in the discharge area H. do. Therefore, the tension ring forming and joining means 16 reaches the preform receiving area C and the container lid receiving area E while holding the tension ring. Therefore, in such a case,
In the tension ring forming and joining means 16, the already formed tension ring, preform and container lid coexist, and excessive force acts on the tool in the curved area F and the joining area G, causing damage or deformation. , which may cause the equipment to malfunction.

In addition, in the tension ring forming and joining means 16, even if the pre-formed body is received in the pre-formed body receiving area C and the container lid is received in the container lid receiving area E, it is also possible that the molding occurs in the curved area F and the joining area G for some reason. Problems similar to those described above occur with molded tension rings when the molded tension ring and container lid fail to connect. In this case, the container lid is transported to the container lid transfer means 18 and the bond reinforcing means 20 in the discharge area H, but there is no problem with the apparatus itself. However, since the container lid obtained in this manner is a defective product, it is necessary to appropriately inspect and remove it.

Therefore, the present invention is characterized in that each means for forming and joining the tension ring is provided with a monitoring means and an elimination means in order to prevent the above-mentioned device failure and occurrence of defective products. It is something.

Next, embodiments of the monitoring means and eliminating means, which are the essential parts of the apparatus of the present invention, will be described with reference to FIGS. 3 to 7.

FIG. 3 shows an embodiment of the monitoring means. That is, the monitoring means of this embodiment is installed in the monitoring area L located downstream of the container lid holding area D when viewed in the rotational direction of the container lid supplying means 14 (see FIG. 2).
It is provided to monitor the supply status of container lids that are continuously supplied to the tension ring forming and joining means 16. In FIG. 3, reference numeral 22
2 shows a stationary guide rail provided on the container lid supply means 14, on the outer surface of which a holding member 26 for holding the monitoring unit 24 is fixed. A light emitting element 32 made of a light emitting diode or the like and a light receiving element 34 made of a photovoltaic cell or the like are fixed to the upper horizontal wall part 28 and the lower horizontal wall part 30 which protrude inward in the radial direction of the holding member 26, respectively.
A monitoring unit 24 is configured. Light projecting element 3
2 is positioned so as to project light downward through the gap between the outer surface of the container lid receiving block 36 provided on the container lid supplying means 14 and the inner surface of the stationary guide rail 22, and the light receiving element 34 receives the light projected from the light projecting element 32. is positioned so as to receive the light that is emitted.

Therefore, the monitoring unit 2 configured in this way
4, if the container lid 38 is located between the light emitting element 32 and the light receiving element 34 held by the container lid receiving block 36, the light from the light emitting element 32 will reach the container lid 38.
The light receiving element 34 is blocked by the light emitting element 32.
It becomes impossible to receive light from the Therefore, when the container lid receiving blocks 36 passing through the monitoring area L one after another after a predetermined interval are holding container lids 38, the container lids 38 passing through the monitoring area L will
By blocking the light from 2, the light receiving element 34
Then, reception of light from the light projecting element 32 is interrupted at predetermined time intervals. However, if, for example, a particular one of the container lid receiving blocks 36 does not hold a container lid 38, this container lid receiving block 3
6 passes through the monitoring area L, the light from the light emitting element 32 is not blocked, and therefore the light receiving element 34 does not transmit light from the light emitting element 3 for a time interval longer than the predetermined time interval.
The reception of light from 2 continues. Therefore, the light receiving element 34 is provided with an appropriate signal generating circuit (not shown) so that the light receiving element 34 receives light from the light emitting element 32 for a time interval longer than the predetermined time interval. If the signal generation circuit is configured to operate and generate a predetermined signal when the operation continues, the supply cutoff state of the container lid 38 can be easily detected.

4 and 5 show one embodiment of the exclusion means. That is, the removal means of this embodiment is installed in the exclusion area M located upstream of the preform receiving area C as seen in the rotational direction of the preform supplying means 12 (see FIG. 2), and is used for tension ring forming. and coupling means 1
This is provided in order to eliminate the pre-formed bodies that are continuously supplied to the molded body 6. In FIG. 4, the removal means of this embodiment comprises an air jet nozzle 42 and a collection duct 44, which are arranged opposite to the tip of a holder 40 provided on the preform supply means 12. As is clear from FIG. 5, the air injection nozzle 42 is directed outward in the radial direction of the holder 40 toward the preformed body 46, which is magnetically attracted and held at the tip of the holder 40. The air flow injection nozzle 42 is also in communication with a suitable source of compressed air via a selectively opened control valve (not shown). Therefore, as shown in FIG.
When the preformed body 46 held by the second holder 40 reaches the exclusion zone M, if the control valve of the air jet nozzle 42 is opened, an air flow is injected from the nozzle 42 and the holder 40 is The preformed body 46 held at the tip can be forcibly separated and collected into the collection duct 44 (see FIG. 5).

The monitoring means and exclusion means of the embodiments described above can be related by suitable electronic control circuitry (not shown) as follows. That is, when the monitoring means provided in the monitoring area L of the container lid supplying means 14 (see FIG. 2) detects that no container lid is being supplied and generates a predetermined detection signal by the signal generating circuit, this By opening the control valve of the exclusion means provided in the exclusion zone M of the preformed body supply means 12 based on the detection signal, the container lid supply means 1 is removed from the container lid receiving area E in the tension ring forming and joining means 16.
The preformed body that is butted against the container lid supplied from 4 can be removed before reaching the preformed body receiving area C. As a result, it is possible to prevent the preform from being supplied alone to the curved area F and bonding area G of the tension ring forming and joining means 16, and the above-mentioned problems can be avoided.

FIG. 6 shows another embodiment of the exclusion means. That is, the exclusion means of this embodiment is installed in the exclusion zone N located downstream of the discharge zone H and upstream of the pre-formed body receiving zone C when viewed in the rotational direction of the tension ring forming and coupling means 16 (the second (see figure) is provided to eliminate a tension ring that is molded separately from the container lid. In FIG. 6, the removal means of this embodiment is composed of an interference member 50 disposed close to the upper surface of the outer member 48 provided on the tension ring forming and coupling means 16, and a stationary support plate 52 for holding this interference member 50. has been done. The interference member 50 is provided at the free end of the stationary support plate 52 and is adapted to cause the formed tension ring 54 held on the upper surface of the outer member 48 to fall radially outwardly of the tension ring formation and coupling means 16. to direct. Therefore, if the tension ring 54 is formed alone in the curved area F and the connection area G of the tension ring forming and connection means 16 without being combined with the container lid for some reason, the eliminating means configured in this way will The tension ring 54 remaining even after passing through the discharge area H can be reliably removed. Note that it is preferable that the removed tension ring 54 is configured to be appropriately collected in a collection container.

FIG. 7 shows another embodiment of the monitoring means. That is, the monitoring means of this embodiment is installed in the monitoring area O located downstream of the discharge area H when viewed in the rotational direction of the container lid transfer means 18 (see FIG. 2), and the tension ring forming and connecting means 16 This is provided to monitor whether or not the container lid, which has been properly connected to the container lid at the same time as the tension ring is formed, is being transported. In FIG. 7, reference numeral 56 indicates a stationary guide rail provided on the container lid transfer means 18, and a holding member 60 for holding the monitoring unit 58 is fixed to the outer surface of this stationary guide rail 56. An upper horizontal wall portion 62 and a lower horizontal wall portion 64 projecting inward in the radial direction of this holding member 60.
The monitoring unit 58 is constructed by fixing a light emitting element 66 made of a light emitting diode or the like and a light receiving element 68 made of a photovoltaic cell or the like, respectively, and fixing a detector 70 made of a proximity switch or the like to the upper horizontal wall 62. ing. The light projecting element 66 is positioned to project light downwardly through the gap between the outer surface of the container lid receiving block 72 provided on the container lid transfer means 18 and the inner surface of the stationary guide rail 56, and the light receiving element 68 It is positioned so as to receive the light projected from 66. In addition, the detector 70
is positioned relative to the upper surface of the stationary guide rail 56 adjacent the container lid receiving block 36 to detect the presence of a tension ring 54 coupled to the container lid 38 passing therethrough. In this case, the stationary guide rail 56 corresponds to the detector 70.
Notch 74 so as not to affect the detector 70
is provided.

Therefore, the monitoring unit 5 configured in this way
8, the container lid 38 to which the tension ring 54 is connected is held by the container lid receiving block 72, and the light emitting element 6
6 and the light-receiving element 68, the light-receiving element 68 intermittents reception of light from the light-emitting element 66 at predetermined time intervals in the same way as in the embodiment shown in FIG. Container lid receiving block 72
If the light receiving element 68 is not held at the same time, the light receiving element 68 continues to receive light from the light projecting element 66 for a time interval longer than the predetermined time interval. On the other hand, the detector 70 performs a detection operation when there is a tension ring 54 arriving together with the container lid 38, which is completely opposite to the detection operation of the light receiving element 68. So, for example,
When the container lid 38 with the tension ring 54 missing is being transferred, the detector 70 also does not perform the detection operation, although the detector 70 should normally perform the detection operation when the light receiving element does not receive light from the light emitting element 66. become. In such a case, an appropriately attached signal generating circuit (not shown) generates a signal to stop the operation of the apparatus, and, for example, searches for the cause of the missing tension ring 54 in the tension ring forming and joining means 16. It is preferable to do so.

The details of the respective configurations of the preformed body forming means 10, the preformed body supplying means 12, the container lid supplying means 14, the tension ring forming and joining means 16, the container lid transporting means 18, and the bonding reinforcement means 20 are as follows.
Patent applications filed on the same date as the present application [Unexamined Japanese Patent Application Publication No. 1983-1993]
-191530, JP 59-191531, JP 59-191532, JP 59-191533,
JP-A-59-191527 and JP-A-59-191534
The details are described in the specification and drawings of the following publication.

〔Effect of the invention〕

As is clear from the foregoing, in the present invention, the container lid supply means for continuously supplying container lids is provided with a monitoring view, and the container lid monitoring means is disposed there, while the preformed body is continuously By providing an exclusion area in the preform supply means and arranging the preform removal means therein, the preform supply means can be provided with a corresponding preform removal area when the supply of the container lid to the tension ring forming and joining means is interrupted. By removing the molded bodies in advance, incomplete molding of the tension ring can be avoided and continuous operation of the device can be safely achieved. Also,
A monitoring area is provided in the means for transporting the container lid with the tension ring, which is formed simultaneously with the tension ring and is joined to the container lid, and the means for monitoring the container lid and the tension ring is disposed therein, and the means for monitoring the container lid and the tension ring is disposed therein. By providing an exclusion zone and arranging a forming ring exclusion means there, it is possible to detect the transfer of a container lid with a missing tension ring, thereby discovering a malfunction of the device, and also to detect the transfer of a container lid with a missing tension ring, and to remove the forming ring that was not joined by the tension ring forming and joining means. The ring can be removed to ensure the safety of the device. Therefore, according to the tension ring forming and joining apparatus equipped with the monitoring means and the exclusion means configured as described above, it is possible to safely manufacture container lids with metal tension rings that are low-cost and have excellent strength, and to improve their performance. Mass production can be easily achieved.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a container lid with a metal tension ring manufactured by the apparatus of the present invention, FIG. 2 is a schematic explanatory diagram showing the manufacturing process of the container lid with a metal tension ring shown in FIG. The figure is a sectional view of a main part showing one embodiment of the monitoring means which is a main part of the device of the present invention, FIG. FIG. 4 is an enlarged perspective view of the main part of the removing means, FIG. 6 is an enlarged perspective view of the main part showing another embodiment of the removing means, and FIG. 7 is a sectional view of the main part showing another embodiment of the monitoring means. It is. 10... Pre-molded body forming means, 12... Pre-molded body supplying means, 14... Container lid supplying means, 16... Tension ring forming and bonding means, 18... Container lid transfer means, 20... Bonding reinforcement means , 22... Stationary guide rail, 24... Monitoring unit, 26... Holding member, 28... Upper horizontal wall, 30... Lower horizontal wall, 32... Light projecting element, 34... Light receiving element, 3
6... Container lid receiving block, 38... Container lid,
40... Holder, 42... Air injection nozzle, 44
... Collection duct, 46 ... Preformed body, 48 ... Outer member, 50 ... Interference member, 52 ... Stationary support plate, 54 ... Tension ring, 56 ... Stationary guide rail, 58 ... Monitoring unit, 60...holding member,
62... Upper horizontal wall part, 64... Lower horizontal wall part,
66... Light emitting element, 68... Light receiving element, 70...
Detector, 72...Container lid receiving block, 74...
...Notch.

Claims (1)

[Scope of Claims] 1. A means for shearing and simultaneously curving a strip from an end of a thin metal plate to form a cylindrical ring-shaped preformed body having both ends overlapped; a free end of a tear-off tab of a container lid; Positioning the container lid and the preformed body so that a portion of the preformed body is overlapped with each other, and curling a peripheral edge of the preformed body in a radial direction to form a ring. a tensile ring forming and connecting means for rolling the tear-off tab into the ring and joining the two together; a container lid supplying means for supplying the container lid to a predetermined position of the tension ring forming and joining means; and a container lid transporting means for supplying the container lid with the tension ring joined to the free end of the tearing tab. An apparatus for forming a metal tension ring and simultaneously bonding it to a container lid, comprising means for transferring the metal tension ring through a means and pressurizing and deforming the joint between the container lid and the tension ring to strengthen the joint, A part of the means is provided with a first monitoring means for detecting supply interruption of the container lid, a part of the preformed body supply means is provided with a first removal means for removing the preformed body, and the tension ring forming and a second to eliminate a tension ring singly molded into part of the coupling means;
a second monitoring means for detecting a container lid and a tension ring connected thereto is provided in a part of the container lid transfer means, and the container lid supply means is configured to provide a container lid in the container lid receiving area. The first monitoring means detects that the preformed body is not conveyed, and activates the first removal means to prevent the preformed body from being conveyed to the preformed body receiving area. Apparatus for forming and simultaneously bonding a metal tension ring to a container lid, characterized in that the second monitoring means is arranged to exclude and monitor tension rings that are incompletely bonded to the container lid.