Dokumentenidentifikation |
EP0936142 29.06.2006 |
EP-Veröffentlichungsnummer |
0000936142 |
Titel |
Umlaufende Einwickelmittel für eine Verpackungsvorrichtung |
Anmelder |
Illinois Tool Works Inc., Glenview, Ill., US |
Erfinder |
Maekawa, Mikio, Itami-shi, Hyogo, JP; Ikeda, Mitsuharu, Itami-shi, Hyogo, JP |
Vertreter |
derzeit kein Vertreter bestellt |
DE-Aktenzeichen |
69931414 |
Vertragsstaaten |
BE, CH, DE, ES, FI, FR, GB, IT, LI, NL, SE |
Sprache des Dokument |
EN |
EP-Anmeldetag |
04.02.1999 |
EP-Aktenzeichen |
993008291 |
EP-Offenlegungsdatum |
18.08.1999 |
EP date of grant |
24.05.2006 |
Veröffentlichungstag im Patentblatt |
29.06.2006 |
IPC-Hauptklasse |
B65B 13/10(2006.01)A, F, I, 20051017, B, H, EP
|
IPC-Nebenklasse |
B65B 25/24(2006.01)A, L, I, 20051017, B, H, EP
B65B 11/04(2006.01)A, L, I, 20051017, B, H, EP
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Beschreibung[en] |
The present, invention concerns a packaging device, used
to package or tie together steel plate wrapped coils, steel bundles and the like,
by tying a packaging material around the surface of the item for packaging, so that
the item for packaging can be easily handled and in order to prevent the item for
packaging from getting dirty. Specifically, it concerns a packaging device which,
on the one hand, can be used for packaging relatively large items for packaging,
yet its structure is simple and can be miniaturized.
In the past, packaging devices of steel plate wrapped coils
included, for example, the device disclosed in Japanese Patent Application 5-294314,
which consisted of a circular track, forming a closed route, which is constructed
so that one part thereof can open and close, a truck, revolving on top of the abovementioned
circular route, a means of feeding a packaging material, which is mounted on the
above-mentioned truck and which feed the packaging material from a packaging material
coil, and a means of support, which can support the item for packaging whose one
part was closed and which is set in the above-mentioned circular route.
According to the above-mentioned existing technology, as
shown in, for example, Figure 3, a truck (51) is set so that it can pass inside
the steel plate wrapped coil, which is the item for packaging, and while a motor
(52) and a current collector (53) are mounted on the truck (51), conductive rails
(55) are arranged along a circular track (54), these conductive rails (55) supply
electric power, via the current collector (53), to a motor (52), and the truck (51)
is thus self-run.
In addition, because the distance between the item for
packaging and the truck (51), surrounding its circumference, varies from one time
to another, a tension accumulator (58) is installed on the truck (51), in order
to prevent slackening of the packaging material (57) delivered from the packaging
material coil (56), which is on the truck (51), when this distance narrows.
In other words, several stationary guide rollers (59) and
several swinging guide rollers (60) are arranged, and if the swinging guide rollers
(60) move away from the stationary guide rollers (59), the packaging material (57),
which revolves the guide rollers (59,60) and moves along a curved route, is slackened
and thus the swinging guide rollers (60) applies a constant tension to the packaging
material (57), as it moves away.
The above-mentioned existing packaging device has the following
problems.
- (1) Because a motor is installed in the truck, the truck has to be large, and
in order to enable this truck to smoothly revolve, the radius of curvature in the
corners has to be big, the circular track has to be big, and the whole packaging
device is enlarged. In addition, because conductive rails are laid along the circular
track, electrical leak counter-measures have to be sufficiently installed in order
to keep the safety of the operator, and the whole packaging device is therefore
enlarged also for this reason.
- (2) In the tension accumulator, which consists of several stationary guide rollers
and several swinging guide rollers, in addition to an urging means, in order for
the swinging guide rollers to smoothly move, space has to be created on the truck,
and the truck has to be enlarged even more. As a result, the circular track has
to be enlarged and the whole packaging device is further enlarged.
In addition, although it may seem that by increasing the
number of guide rollers, the movement distance of the above-mentioned swinging guide
rollers can be decreased, in such a case, the resistance produced between the guide
rollers and the packaging material increases, the smooth movement of the swinging
guide rollers is interrupted, and especially in devices wherein the truck revolves
at a high speed, they cannot respond quickly to rapid changes in the tension of
the packaging material.
The present invention solves the above-mentioned problems
by proposing a packaging device which can be used for packaging relatively large
items for packaging, while its structure is simple and can be miniaturized.
According to a first aspect of the present invention a
packaging device, is equipped with a means of feeding a packaging material, constructed
so that it can feed a packaging material from a packaging material coil, which is
supported so that it can rotate,
and which is characterized by the fact, that the above-mentioned packaging material
coil is connected with mobility, via a torque limiter, to a drive generator, which
applies a rotatory force in the direction opposite to the direction in which the
packaging material is fed, so that, if the rotatory force, generated by drawing
the packaging material from the packaging material coil, decreases below a set value,
this packaging material coil can rotate in the opposite direction.
Since the second aspect is constructed as above, if the
tension of the packaging material decreases as a result of a decrease in the length
of the packaging material drawn from the packaging material coil, until it is wrapped
around the item for packaging, the rotatory force produced by the drive generator
is transmitted to the packaging material coil, the packaging material coil rotates
in the opposite direction and applies tension to the packaging material.
On the other hand, by being wrapped around the item for
packaging, a tension exceeding a set value is applied to the packaging material,
drawn from the packaging material coil, and the rotatory force from the drive generator
is interrupted by the rotatory force limiter, and the packaging material is thus
smoothly fed from the packaging material coil. As a result, the first aspect has
the following advantage.
- (A) The drive generator is connected, with mobility, to the packaging material
coil and tension control rollers, via a torque limiter, and a set tension can therefore
be applied to the packaging material. Therefore, there is no need to install the
numerous swinging guide rollers, used in the above-mentioned past technology, and
the whole packaging device can be simplified and miniaturized.
According to a second aspect of the present invention a packaging device, is equipped
with a means of feeding a packaging material, constructed so that it can feed a
packaging material from a packaging material coil, and is characterized by the fact,
that a tension control roller is installed between the packaging material coil and
the item for packaging, which is wrapped by the packaging material, fed from the
packaging material coil, that the tension control roller is constructed so that
it can be rotated by the passage of the packaging material along the surface of
the tension control roller, and that the tension control roller is connected with
mobility, via a torque limiter, to a drive generator, which applies a rotatory force
in the direction opposite to the direction in which the packaging material passes
the above-mentioned tension control roller, so that, if the tension of the packaging
material, which passed the surface of the tension control roller (14), decreases
below a set value, this tension control roller can rotate in the opposite direction.
Since the second aspect is constructed as above, when the packaging material, fed
by from the packaging material coil, passes, a tension control roller rotates as
a result of the friction with the packaging material. In addition, if the tension,
applied by the packaging material as it wraps around the item for packaging, decreases
below a set value, the tension control roller rotates in the opposite direction
and the packaging material rewinds, causing the tension of the packaging material
to be maintained over the set value. Moreover, if the tension, applied by the packaging
material as it wraps around the item for packaging, exceeds a set value, the rotatory
force produced by the drive generator is interrupted by the rotatory force limiter,
and the packaging material is thus smoothly fed from the packaging material coil.
As a result, the second aspect has the following advantage in addition to that of
the first aspect.
- (B) A drive generator, which applies a rotatory force in the opposite direction,
is connected with mobility via torque limiters to the tension control rollers, set
between the packaging material coil and the item for packaging, and a constant tension
can therefore be applied to the packaging material, regardless of the consumption
of the packaging material.
The packaging devices, pertaining to the above-mentioned
first and second, aspects, can be applied to packaging devices which wrap a packaging
material around an item for packaging by fixing a means of feeding the packaging
material and causing the item for packaging to be self-run. The packaging devices
pertaining to the first and second aspects can be applied to a packaging device
which causes a truck, on which the means of feeding the packaging material is mounted,
to revolve along a circular track. In addition, in such a case the truck can be
driven by a means of running the truck, which is set along the circular track, or
the truck can be made to self-run by means of a motor, which is mounted on the truck
and is supplied electricity from conductive rails, arranged along the circular track.
In addition, as the drive generator used in the packaging
device pertaining to the above-mentioned first and second aspects, a drive generator
for exclusively reverse rotation can be installed, but in the case that the above-mentioned
means of feeding the packaging material is mounted on the truck and causes it to
revolve around the circumference of the item for packaging, it is recommended to
utilize this drive generator, which can cause the truck to revolve. If the truck
revolution speed is increased, the changes in the distance between the packaging
material coil and the item for packaging become sharp and slack can be rapidly produced.
By utilizing the drive generator which causes the truck to revolve, therefore, the
slack produced by the above-mentioned changes in distance can be quickly absorbed
in response to the speed of the truck.
A particular embodiment of a device in accordance with
this invention will now be described with reference to the accompanying drawings;
in which:-
- Figure 1 is a front cutaway view of the packaging device, showing an embodiment
of the present invention;
- Figure 2 is a perspective cutaway view of the truck, used in the packaging device;
and
- Figure 3 is a front cutaway view of the truck, showing the past technology.
As shown in Figure 1, this packaging device (1) is equipped
with a frame (3), in which a holding space for the item for packaging (2) is set,
a truck (4), which revolves around the circumference of the above-mentioned holding
space for the item for packaging (2), a means of feeding a packaging material (7),
which feeds a packaging material (6) from a packaging material coil (5), which is
mounted on the above-mentioned truck (4), and a means of support (9), which supports
the steel plate wrapped coil, which is the item for packaging (8).
The above-mentioned frame (3) consists of two U-shaped
half-frames (3a/3a), set so that their open sides (10) face each other, and a circular
track (11), which forms a closed route, is formed along the inner rim of the front
and back sides of the frame (3).
Each of the above-mentioned U-shaped half-frames (3a/3a)
are made so that they can connect and disconnect, to the right and left, in Figure
1, and by connecting and disconnecting, the above-mentioned circular route (11)
opens and closes in the center.
In addition, the carrying-in and carrying-out of the above-mentioned
steel plate wrapped coil (8) is done with the above-mentioned circular track (11)
in the open state. In the carrying-in state, shown in Figure 1, only the upper part
of the steel plate wrapped coil (8) is placed in the above-mentioned circular track
(11). In- other words, in a state in which the circular track (11) is inserted inside
the steel plate wrapped coil (8), the steel plate wrapped coil is supported by the
above mentioned means of support (9).
In addition, the circular route(11) is constructed so that
it can open and close by causing the two U-shaped half-frames (3a/3a) to mutually
connect and disconnect, but the circular route can also open and close by movement
of only one part of the frame, such as by a parallel movement or a swinging movement,
and the like.
As shown in Figures 1 and 2, in the above-mentioned U-shaped
half-frame (3a), a serrated toothed belt (12), which rotates on the inner side and
outside of it, is installed as a means of driving the truck. When the serrated toothed
belt (12) rotates, through the work of a motor (13), it is caused to interlock with
the above-mentioned truck (4), and the driving force of the serrated toothed belt
(12) thus causes the truck (4) to revolve along the above-mentioned circular track
(11).
The packaging material (6), fed from the above mentioned
packaging material coil (5), is gradually drawn from the packaging material coil
(5) as the truck revolves on the circular track (11), and after it passes the circumference
of the tension control roller (14), it is wrapped around the above-mentioned steel
plate wrapped coil.
The above-mentioned steel plate wrapped coil (8) is rotated
and at the same time supported by the above-mentioned means of support (9), and
therefore, the above-mentioned packaging material (6) spirally wraps the inside
and outside of the steel plate wrapped coil (8) and the packaging is completed within
one rotation of the steel plate wrapped coil (8) on the means of support (9).
As shown in Figure 2, in the above-mentioned truck (4),
passive gears (16) are supported, with mobility, between two side planks (15/15),
and the above-mentioned serrated toothed belt (12) engages with these passive gears
(16). The above mentioned passive gears (16) are connected with mobility to driving
gears (18) via transmission mechanisms (17), set on the outside of the above-mentioned
side planks (15). These driving gears (18) engage with a rack, formed in the outer
surface of the above-mentioned circular track (11), and the driving force of the
above-mentioned serrated toothed belt (12) is transmitted from the passive gears
(16) to the driving gears (18), thereby causing the truck (4) to revolve along the
circular track (11).
Because the above-mentioned serrated toothed belts (12)
are each set along the whole inner surface of each of the U-shaped half-frames (3a),
as shown in Figure 1, if the openings (10) of both U-shaped half-frames (3a/3a)
touch each other, the two serrated toothed belts (12/12) are likely to interfere
with each other in the above-mentioned openings (10). In this embodiment, therefore,
the serrated toothed belt (12) of one side is set, as shown in Figure 2, in a groove
on one side, which is formed in the U-shaped half-frame (3a), while the other serrated
toothed belt (12) is set in a groove on the opposite side, and both serrated toothed
belts (12/12) do not interfere with each other. Therefore, the above-mentioned passive
gears (16) are set in two places between the side planks (15/15). Nevertheless,
the means of engagement are not limited to or by the structure described in this
embodiment.
Moreover, in order for the truck (4) to be smoothly guided
on the circular track (11), four holding rollers (20) are installed in the front
and back in the inner surface of each side plank (15).
Between the above-mentioned two side planks (15/15), as
the above-mentioned means of feeding the packaging material, the packaging material
coil (5), tension control roller (14) and three guide rollers (21...) are supported,
each with mobility, and the packaging material (6), drawn from the packaging material
coil (5), passes a route which curves between the tension control roller (14) and
the three guide rollers (21...) and is fed to the circumference of the steel plate
wrapped coil, during which process the friction with the packaging material (6),
which passes along the surface of the tension control roller (14), causes it to
freely rotate.
When the above-mentioned truck (4) revolves along the circular
track (11), the distance between the packaging material coil (5) and the position
for wrapping the steel plate wrapped coil (8) periodically changes, but when this
distance decreases, the drawing force of the packaging material (6) from the packaging
material coil (5), or, in other words, the tension of the packaging material (6),
weakens, and adequate wrapping cannot be conducted. Torque limiters (24/24) were
therefore installed at the ends of the front side, shown in Figure 2, of the support
axis (22) of the above-mentioned packaging material coil (5) and of the support
axis (24) of the tension control rollers (14), each of these torque limiters (24)
is connected, with mobility, to the above-mentioned passive gear (16), which becomes
the drive generator (25), via the abovementioned transmission mechanism (17), so
that a rotatory force in the direction opposite to the direction in which the packaging
material (6) is fed and passes, can be applied by the passive gear (16) to the packaging
material coil (5) and tension control roller (14).
In the case that the packaging material coil (5) and the
tension control roller (14) rotate at a rotatory force which exceeds a set value,
through the drawing of the packaging material (6), the above-mentioned torque limiter
(24) interrupts the rotatory force produced by the drive generator (25), so that
the packaging material (16) is smoothly drawn. In addition, in the case that the
rotatory force, produced by the above-mentioned drawing, decreases below a set value,
the interruption is removed and the rotatory force produced by the drive generator
(25) is applied, the slackened packaging material (6) is rewound and the tension
increased.
In addition, because the external diameter (of the packaging
material coil (5)) decreases with the consumption of the packaging material (6),
the rotatory force in the opposite direction, which rotates the above-mentioned
packaging material coil (5) via the above-mentioned torque limiter (24), initially
can only resist a small drawing force. Nevertheless, because the rotatory force
in the opposite direction, which rotates the above-mentioned packaging material
coil (5), is aimed at eliminating slack in the packaging material between the packaging
material coil (5) and the tension control roller (14), there is no problem even
when the tension changes.
On the other hand, because the external diameter of the
tension control rollers (14) is constant, the rotatory force which rotates the tension
control rollers (14) is not affected by the consumption of the packaging material
(6), and tension higher than a predetermined one can be applied to the packaging
material (6) wrapped around the steel plate wrapped coil (8).
In the above-mentioned embodiment, the explanation refers
to the packaging of a steel plate wrapped coil, but, needless to say, the invention
can also be applied to packaging of other items for packaging, such as steel bundles.
In the case that a long steel bundle is packaged, for example, packaging can be
done by spirally wrapping the packaging material, by causing the truck to revolve
while the steel bundle is gradually moved in a direction perpendicular to the page.
Moreover, the mechanism which maintains the tension of
the above-mentioned packaging material above a set value can be applied also in
the case that the means of feeding the packaging material is stationary and the
item for packaging is caused to freely rotate. However, as shown in the above-mentioned
embodiment, in the case that the above-mentioned mechanism is utilized in a means
of feeding the packaging material, which is mounted on a truck which revolves along
a circular track, the tension of the packaging material can be maintained by a simple
and compact structure, the truck can be miniaturized and the whole packaging device
can be miniaturized.
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Anspruch[de] |
Verpackungsvorrichtung, die mit einem Mittel (7) zur Zuführung
eines Verpackungsmaterials ausgestattet ist, das so ausgeführt ist, dass es
ein Verpackungsmaterial (6) von einer drehbar gestützten Verpackungsmaterialrolle
(5) zuführen kann,
dadurch gekennzeichnet, dass die oben erwähnte Verpackungsmaterialrolle
(5) über einen Drehmomentbegrenzer (24) beweglich mit einem Antriebsgenerator
(25) verbunden ist, der eine Drehkraft in die der Zuführungsrichtung des Verpackungsmaterials
(6) entgegengesetzte Richtung anlegt, so dass sich die Verpackungsmaterialrolle
(5), wenn die durch Ziehen des Verpackungsmaterials (6) von der Verpackungsmaterialrolle
(5) erzeugte Drehkraft unter einen Einstellwert verringert wird, in die entgegengesetzte
Richtung drehen kann.
Verpackungsvorrichtung, die mit einem Mittel (7) zur Zuführung
eines Verpackungsmaterials ausgestattet ist, das so ausgeführt ist, dass es
ein Verpackungsmaterial (6) von einer Verpackungsmaterialrolle (5) zuführen
kann,
dadurch gekennzeichnet, dass eine Spannungssteuerwalze (14) zwischen der
Verpackungsmaterialrolle (5) und dem zu verpackenden Gegenstand (8), der von dem
von der Verpackungsmaterialrolle (5) zugeführten Verpackungsmaterial (6) eingewickelt
wird, installiert ist und dass die Spannungssteuerwalze (14) so ausgeführt
ist, dass sie durch das Laufen des Verpackungsmaterials (6) entlang der Fläche
der Spannungssteuerwalze (14) gedreht werden kann, und dass die Spannungssteuerwalze
(14) über einen Drehmomentbegrenzer (24) beweglich mit einem Antriebsgenerator
(25) verbunden ist, der eine Drehkraft in die Richtung anlegt, die der Richtung,
in der das Verpackungsmaterial (6) über die genannte Spannungssteuerwalze (14)
läuft, entgegengesetzt ist, so dass sich diese Spannungssteuerwalze (14) bei
Abnahme der Spannung des Verpackungsmaterials (6), das die Fläche der Spannungssteuerwalze
(14) passiert hat, unter einen Einstellwert, in die entgegengesetzte Richtung drehen
kann.
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Anspruch[en] |
A packaging device equipped with a means of feeding a packaging material
(7), constructed so that it can feed a packaging material (6) from a packaging material
coil (5), which is supported so that it can rotate,
characterized in that the abovementioned packaging material coil (5) is connected
with mobility, via a torque limiter (24) to a drive generator (25), which applies
a rotatory force in the direction opposite to the direction in which the packaging
material (6) is fed, so that, if the rotatory force, generated by drawing the packaging
material (6) from the packaging material coil (5), decreases below a set value,
this packaging material coil (5) can rotate in the opposite direction.
A packaging device equipped with a means of feeding a packaging material
(7), constructed so that it can feed a packaging material (6) from a packaging material
coil (5),
characterized in that a tension control roller (14) is installed between
the packaging material coil (5) and the item for packaging (8), which is wrapped
by the packaging material (6), fed from the packaging material coil (5),
and that the tension control roller (14) is constructed so that it can be rotated
by the passage of the packaging material (6) along the surface of the tension control
roller (14) and that the tension control roller (14) is connected with mobility,
via a torque limiter (24), to a drive generator (25), which applies a rotatory force
in the direction opposite to the direction in which the packaging material (6) passes
the above-mentioned tension control roller (14), so that, if the tension of the
packaging material (6), which passed the surface of the tension control roller (14),
decreases below a set value, this tension control roller (14) can rotate in the
opposite direction.
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Anspruch[fr] |
Dispositif d'emballage doté d'un moyen (7) d'avancement d'un matériau
d'emballage construit de manière à pouvoir faire avancer un matériau
d'emballage (6) depuis une bobine (5) de matériau d'emballage soutenue de manière
à pouvoir tourner,
caractérisé en ce que ladite bobine (5) de matériau d'emballage
est reliée de manière mobile par l'intermédiaire d'un limiteur de
couple (24) à un générateur d'entraînement (25) qui exerce une
force rotatoire dans la direction opposée à la direction dans laquelle
le matériau d'emballage (6) est avancé de telle sorte que si la force
rotatoire créée lorsque le matériau d'emballage (6) est tiré
de la bobine (5) de matériau d'emballage diminue en dessous d'une valeur fixée,
cette bobine (5) de matériau d'emballage peu tourner dans le sens inverse.
Dispositif d'emballage doté d'un moyen (7) d'avancement d'un matériau
d'emballage construit de manière à permettre de faire avancer un matériau
d'emballage (6) provenant d'une bobine (5) de matériau d'emballage,
caractérisé en ce qu'un rouleau (14) de contrôle de traction
est installé entre la bobine (5) de matériau d'emballage et l'objet emballé
(8) qui est emballé par le matériau d'emballage (6) extrait de la bobine
(5) de matériau d'emballage,
en ce que le rouleau (14) de contrôle de traction est construit de manière
à pouvoir être mis en rotation par le passage du matériau d'emballage
(6) à la surface du rouleau (14) de contrôle de traction et
en ce que le rouleau (14) de contrôle de traction est relié de
manière mobile, par l'intermédiaire d'un limiteur de couple (24), à
un générateur d'entraînement (25) qui exerce une force rotatoire
dans la direction opposée à la direction dans laquelle le matériau
d'emballage (6) passe sur ledit rouleau (14) de contrôle de traction de telle
sorte que si la traction dans le matériau d'emballage (6) qui passe sur la
surface du rouleau (14) de contrôle de traction diminue en dessous d'une valeur
fixe, ce rouleau (14) de contrôle de traction peut tourner dans le sens opposé.
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Patent Zeichnungen (PDF)
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