Technical Field
[0001] The present invention relates to a film label fitting apparatus. In particular, it
relates to a film label fitting apparatus configured to shape a film label into a
cylindrical shape before fitting the film label around the barrel of a container.
Background Art
[0002] Film label fitting apparatuses configured to fit a film label in a cylindrical shape
around the barrel of a container are well known (see Patent Documents 1 and 2, for
example).
[0003] The apparatus according to Patent Document 1 is configured to cut a film label in
a band shape to a predetermined length, shaping the resulting film label into a cylindrical
shape by wrapping the film label around a mandrel and fusing the opposite ends with
each other, and then holding the film label in the cylindrical shape with a picker
and lowering the film label to fit the film label around the outer periphery of a
container. The apparatus according to Patent Document 1 is configured so that two,
upper and lower, contact parts 36 of a pick-up device 33 hold a label 11 in the cylindrical
shape at only two points vertically spaced apart from each other.
[0004] The apparatus according to Patent Document 2 can fit film labels in a cylindrical
shape having different outer diameters (spread widths) around containers having different
outer diameters.
Prior Art Documents
Patent Document
[0005]
Patent Document 1: National Publication of International Patent Application No. 2009-509871
Patent Document 2: Japanese Patent Laid-Open No. 2008-50018
Summary of Invention
Problems to be Solved by the Invention
[0006] The apparatus according to Patent Document 1 has a problem that the pick-up device
33 holds the film label 11 in the cylindrical shape with low stability, since the
pick-up device 33 is configured to hold the film label 11 in the cylindrical shape
at only two points vertically spaced apart from each other. In addition, when the
apparatus according to Patent Document 1 is to handle a film label in the cylindrical
shape having a shorter vertical dimension (length), the pick-up device 33 needs to
be replaced with another pick-up device 33 suitable for the length.
[0007] According to Patent Document 2, film labels in the cylindrical shape having different
outer diameters (spread widths) can be fitted around containers. However, handling
of film labels having different vertical dimensions is not taken into consideration.
Means for Solving the Problems
[0008] In view of the circumstances described above, the present invention provides a film
label fitting apparatus comprising: a rotator that is rotatably provided; a plurality
of mounts provided on the rotator on which containers are mounted; supporting members
that are provided above the respective mounts so as to be capable of being raised
and lowered with respect to the mounts and support mouths of the containers to hold
the containers between the supporting members and the mounts; mandrels that are provided
for the respective mounts on the rotator to hold and shape film labels into a cylindrical
shape; pickers that are disposed on the respective mandrels and hold, from outside,
the film labels shaped into the cylindrical shape by the mandrels; and raising and
lowering mechanisms that raise and lower the pickers between the level of the mandrels
and the level of the containers on the mounts when the rotator rotates,
the containers mounted on the mounts being conveyed as the rotator rotates, and the
film labels shaped into the cylindrical shape by the mandrels being held by the pickers
and fitted around barrels of the containers placed below,
characterized in that the pickers are configured to hold outer peripheries of the
film labels shaped into the cylindrical shape by the mandrels and fit the film labels
around the barrels of the containers, an adjustment mechanism that changes the amount
of movement of the pickers is provided in a fitting section where the pickers fit
the film labels in the cylindrical shape around the barrels of the containers, and
the adjustment mechanism is capable of changing the level at which fitting of the
film labels by the pickers occurs in the fitting section to accommodate a difference
in vertical dimension of the film labels in the cylindrical shape.
Advantageous Effects of Invention
[0009] With the configuration described above, when the film labels shaped into the cylindrical
shape have different vertical dimensions, the adjustment mechanism can change the
level at which fitting of the film labels by the pickers occur, so that the film labels
having different vertical dimension can be fitted around the containers. Thus, the
present invention can provide a highly versatile film label fitting apparatus.
Brief Description of the Drawings
[0010]
[Figure 1]Figure 1 is a schematic plan view showing an embodiment of the present invention.
[Figure 2]Figure 2 is a cross-sectional view of essential parts taken along the line
II-II in Figure 1.
[Figure 3]Figures 3 show relative positions of film labels and containers to be handled
by a label fitting apparatus shown in Figure 1, Figure 3(a) showing a case where a
full label FL is fitted around a container, and
Figure 3(b) showing a case where a half label HL is fitted around a container.
[Figure 4]Figure 4 is an enlarged view of essential parts shown in Figure 1.
[Figure 5]Figure 5 is an enlarged view of essential parts shown in Figure 1.
[Figure 6]Figure 6 is an enlarged view of a picker shown in Figure 1.
[Figure 7]Figure 7 is a front view of essential parts shown in Figure 1.
[Figure 8]Figures 8 are diagrams for illustrating an operation of the label fitting
apparatus shown in Figure 1 fitting the full label FL around the container.
[Figure 9]Figures 9 are diagrams for illustrating an operation of the label fitting
apparatus shown in Figure 1 fitting the half label HL around the container.
[Figure 10]Figure 10 is a cross-sectional view of essential parts according to another
embodiment of the present invention.
Mode for Carrying out the Invention
[0011] In the following, the present invention will be described with regard to embodiments
shown in the drawings. In Figures 1 and 2, a film label fitting apparatus 1 is configured
to cut a roll-fed film label 2 to a predetermined length, shape the cut film label
2 into a cylindrical shape and fit the film label 2 in the cylindrical shape around
a barrel 3A of a container 3 having a circular cross section. The film label 2 is
referred to also as a shrink label and is placed around the barrel 3A of the container
3, which is a plastic bottle, and then is heated to shrink and be tightly fitted on
the outer periphery of the barrel 3A.
[0012] The film label fitting apparatus 1 according to an embodiment comprises a labeler
main unit 5 that rotates clockwise to convey containers 3 supported on respective
mounts 4 and fits a film label 2 in a cylindrical shape around the barrel 3A of each
container 3, a feeding star wheel 11 that feeds the containers 3 onto the respective
mounts 4 in the labeler main unit 5 at a feed position A, label feeding means 12 that
cuts the roll-fed film label 2 to a predetermined length and feeds the cut film label
2 to the labeler main unit 5, and a discharging star wheel 13 that discharges the
containers 3 off the respective mounts 4 at a discharge position B.
[0013] The film label fitting apparatus 1 performs a process that begins with shaping the
film label 2 cut to a predetermined length into a cylindrical shape and ends with
fitting the film label 2 around the barrel 3A of the container 3 placed below the
film label 2. The container 3 discharged off the mount 4 in the labeler main unit
5 by the discharging star wheel 13 is then conveyed to a subsequent process (not shown),
in which the film label 2 in the cylindrical shape fitted around the barrel 3A of
the container 3 is heated to shrink and be tightly fitted on the outer periphery of
the barrel 3A.
[0014] As described in detail later, the film label fitting apparatus 1 according to this
embodiment is characterized by the capability of switching between fitting the film
label 2 having a longer vertical dimension (a full label FL) around substantially
the whole of the barrel 3A of the container 3 and fitting the film label 2 having
a shorter vertical dimension (a half label HL) around only an upper part of the barrel
3A of the container 3 (see Figures 3(a) and 3(b)).
[0015] On the upstream side of the feeding star wheel 11, a feeding conveyer 14 that conveys
a row of containers 3 in the standing position is disposed, and a timing screw 15
that spaces each container 3 on the feeding conveyer 14 away from the preceding and
following containers 3 is provided.
[0016] On the downstream side of the discharging star wheel 13, a discharging conveyer 16
that receives the containers 3 from the discharging star wheel 13 and conveys the
containers 3 to a subsequent process on the downstream side is provided.
[0017] Although not shown, the feeding star wheel 11 and the discharging star wheel 13 are
each provided, on the outer periphery thereof, with a plurality of pockets that house
and hold the containers 3. The feeding star wheel 11 is configured to successively
feed the containers 3 spaced apart from each other by the timing screw 15 from the
feeding conveyer 14 onto the mounts 4 at the feed position A. The discharging star
wheel 13 is configured to discharge the containers 3 with the film label 2 fitted
around the barrel 3A thereof off the mounts 4 and pass the containers 3 to the discharging
conveyer 16 at the discharge position B.
[0018] The labeler main unit 5 is configured to rotate clockwise in Figure 1 and convey
the containers 3 on the respective mounts 4 from the feed position A to the discharge
position B, and the label feeding means 12 is disposed at a position outside of a
label feed position C in the conveyance path of the containers 3.
[0019] The label feeding means 12 comprises a feed roller 21 that unrolls a length of film
label 2 and feeds the film label 2, a rotary cutter 22 that successively cuts the
roll-fed film label 2 to a predetermined length, and a feeding drum 24 that passes
the film labels 2 having the predetermined length to respective mandrel 23 in the
labeler main unit 5 at the label feed position C. The feed roller 21, the rotary cutter
22 and the feeding drum 24 are configured to rotate in synchronization with each other.
[0020] The label feeding means 12 further comprises an applying roller 25 that applies an
UV curing adhesive to each film label 2 having the predetermined length cut by the
rotary cutter 22. The applying roller 25 is disposed adjacent to the outer periphery
of the feeding drum 24. The applying roller 25 can be moved by a drive mechanism (not
shown) between an advanced position and a retracted position. The applying roller
25 is in the advanced position when in operation and in the retracted position when
not in operation.
[0021] As shown in Figure 2, a large number of suction holes 24A is formed in the outer
surface of the feeding drum 24, and a suction is exerted on all the suction holes
24A through a negative pressure channel inside of the feeding drum 24. As a result,
the film labels 2 cut to the predetermined length by the rotary cutter 22 are sucked
and held to the outer surface of the rotating feeding drum 24. In this process, each
film label 2 is sucked and held to the outer surface of the feeding drum 24 in a reverse
state, in which the back surface of the film label 2 faces up.
[0022] As the feeding drum 24 rotates, the applying roller 25 is advanced at a predetermined
time to apply the UV curing adhesive to the film label 2 sucked and held to the feeding
drum 24. This process is designed so that the UV curing adhesive is applied to a rear
end of each film label 2 held on the outer surface of the feeding drum 24.
[0023] The film labels 2 with the UV curing adhesive applied thereto are then passed from
the feeding drum 24 to the respective mandrels 23 in the labeler main unit 5 at the
label feed position C. In this embodiment, both the film label 2 having a longer vertical
dimension (full label FL) and the film label 2 having a shorter vertical dimension
(half label HL) are passed from the feeding drum 24 to the mandrel 23 with the lower
end of the film label 2 being at substantially the same level as the lower end of
the mandrel 23.
[0024] As described in detail later, each film label 2 passed to the mandrel 23 is held
to wrap around the outer surface of the mandrel 23 and thereby shaped into a cylindrical
shape with the front surface facing up and the rear end with the UV curing adhesive
and the front end being overlaid one on another.
[0025] To harden the UV curing adhesive on the film label 2 in this state, UV irradiating
means 26 is disposed at a hardening position D in the conveyance path of the mandrel
23. When the film label 2 in the cylindrical shape held on each mandrel 23 is conveyed
to the hardening position D from the label feed position C, the UV irradiating means
26 emits UV rays to the overlaid parts (the UV curing adhesive) of the front end and
the rear end of the film label 2 held on the mandrel 23. The UV curing adhesive between
the front end and the rear end of the film label 2 in the cylindrical shape held on
the mandrel 23 is then hardened, and the front end and the rear end overlaid one on
another is firmly bonded to each other.
[0026] The label feeding means 12 is configured as described above, and the film labels
2 cut to the predetermined length to which the UV curing adhesive is applied successively
are passed to the respective mandrels 23 in the rotating labeler main unit 5 at the
label feed position C.
[0027] Next, a configuration of the labeler main unit 5 will be described. The labeler main
unit 5 comprises a central shaft 32 provided on a base 31 to stand in the vertical
direction, a cylindrical member 33 rotatably provided on the central shaft 32 with
a plurality of bearings interposed therebetween, three plates 34 to 36 fitted to the
cylindrical member 33 in the horizontal position, a large number of mounts 4 provided
on the outer periphery of the lowest plate 34 at regular intervals on which the containers
3 are to be mounted, mandrels 23 provided above the respective mounts 4 to shape the
film label 2 into a cylindrical shape, supporting members 37 that are provided above
the respective mounts 4 so as to be capable of being raised and lowered and each of
which is to be fitted onto an upper end mouth 3B of the container 3, and pickers 41
that are provided on the respective mandrels 23 and each of which sucks and holds
the outer periphery of a lower part of the film label 2 in the cylindrical shape formed
around the mandrel 23 and fits the film label 2 around the barrel 3A of the container
3.
[0028] The plates 34 to 36 are integrated with each other by the cylindrical member 33
and can integrally rotate about the central shaft 32. Sets of the mount 4, the mandrel
23, the supporting member 37 and the picker 41 are provided at regular intervals along
the circumference of the outer periphery of the plates 34 to 36.
[0029] The plates 34 to 36 rotate clockwise in Figure 1 at a constant speed by the action
of a driving force of a motor (not shown), and the feeding star wheel 11 and the discharging
star wheel 13 rotate in synchronization with the plates 34 to 36 by the action of
transmission means (not shown).
[0030] The mounts 4 are fixed to the lowest plate 34, and mounting surfaces of the mounts
4, which are the upper surfaces thereof, are flat surfaces and are all kept at the
same level.
[0031] As shown in Figures 2 to 4, a cylindrical member 42 is disposed above each mount
4 to vertically penetrate the outer periphery of the middle plate 35, which is located
above the mounts 4, and the cylindrical member 42 is rotatably supported by a bearing.
The mandrel 23 is hollow and cylindrical and is fitted around the outer periphery
of the lower end of the cylindrical member 42.
[0032] A straight negative pressure pipe 43 is slidably passed through the cylindrical member
42, and the supporting member 37 is coupled to the lower end of the cylindrical member
42 passed through the cylindrical member 42 and the mandrel 23. The inside of the
negative pressure pipe 43 constitutes a negative pressure channel 43A, and the negative
pressure channel 43A is connected to a suction means (not shown) at the upper end
thereof.
[0033] The mandrel 23 is manufactured to have a length conforming to the vertical length
of the film label 2 to be treated. In this embodiment, in order that the mandrel 23
can be used with both the film label 2 having the longer vertical dimension (full
label FL) shown in Figure 3(a) and the film label 2 having the shorter vertical dimension
(half label HL) shown in Figure 3(b), the mandrel 23 has a length conforming to the
vertical dimension of the film label 2 shown in Figure 3(a) (full label FL). In addition,
the mandrel 23 is manufactured to have a slightly larger outer diameter than the barrel
3A of the container 3, so that the film label 2 shaped into a cylindrical shape by
the mandrel 23 can be fitted around the barrel 3A of the container 3 with a slight
clearance.
[0034] As shown in Figure 4, a large number of radial suction holes 23A is formed in the
outer surface of the mandrel 23 at positions below the cylindrical member 42. The
suction holes 23A are always in communication with a space S between the lower part
of the inner surface of the mandrel 23 and the outer surface of the negative pressure
pipe 43.
[0035] On the other hand, communication holes 43B in communication with the suction holes
23A via the space S are formed in the negative pressure pipe 43 at predetermined positions.
When the suction means (not shown) is activated, a negative pressure is exerted on
each suction hole 23A via the negative pressure channel 43A, the communication holes
43B and the space S, so that the film label 2 in the cylindrical shape can be sucked
and held to the outer surface of the mandrel 23 in this state. In this embodiment,
the outer surface of the mandrel 23 and the suction holes 23A formed therein constitute
a holding section that holds the film label 2.
[0036] A servo motor 44 is provided on the middle plate 35 for each mandrel 23. The servo
motor 44 is configured to rotate the cylindrical member 42 and the mandrel 23 via
three gears 45 to 47.
[0037] The gear 47 is fitted on the upper end part of the cylindrical member 42, and the
gear 45 is provided on a drive shaft of the servo motor 44. The gears 47 and 45 are
engaged with the gear 46, which is rotatably provided on the middle plate 35.
[0038] With such a configuration, when the drive shaft of the servo motor 44 rotates, the
gears 45 to 47 also rotate in association to make the cylindrical member 42 and the
mandrel 23 rotate (revolve). The servo motor 44 makes the mandrel 23 rotate when the
film label 2 is to be passed from the feeding drum 24 at the label feed position C.
[0039] Next, the supporting member 37 that holds the upper end mouth 3B of the container
3 will be described. As shown in Figure 4, the supporting member 37 has a cylindrical
shape and substantially the same outer diameter as the negative pressure pipe 43 and
is coupled to the lower end of the negative pressure pipe 43 and raised and lowered
by a raising and lowering mechanism 48.
[0040] As shown in Figure 2, a sliding member 52 that is raised and lowered along a slide
rail 51, which is fixed to the plate 36, is coupled to an upper part of the negative
pressure pipe 43. The sliding member 52 is provided with a first cam follower 53.
[0041] A first cam 54 is disposed outside of and adjacent to the plate 36 so as to surround
the labeler main unit 5. The first cam follower 53 is engaged with the first cam 54.
As a result, as the labeler main unit 5 rotates clockwise, the negative pressure pipe
43 and the supporting member 37 coupled to the lower end of the negative pressure
pipe 43 is raised and lowered along a cam groove of the first cam 54. As a result,
as the labeler main unit 5 rotates to convey the mounts 4 on which the containers
3 are mounted, the supporting member 37 can be fitted onto the upper end mouth 3B
of the container 3 on the mount 4 in a predetermined region in the conveyance path
and can be moved to an upward position so as to be spaced apart from the upper end
mouth of the container 3 at the feed position A and the discharge position B. Once
the supporting member 37 is fitted onto the mouth 3B of the container 3, the container
3 is held between the mount 4 and the supporting member 37. The raising and lowering
mechanism 48 is configured as described above.
[0042] In this embodiment, the mount 4 is fixed, and the supporting member 37 is raised
and lowered. As an alternative, however, the supporting member 37 may be fixed, and
the mount 4 may be raised and lowered.
[0043] Next, the picker 41 that holds the film label 2 in the cylindrical shape held on
the mandrel 23 and fits the film label 2 around the container 23, a raising and lowering
mechanism 55 that raises and lowers the picker 41, and an adjustment mechanism 56
that changes the amount of raising or lowering of the picker 41 at a fitting position
E will be described.
[0044] Specifically, as shown in Figures 2 and 5 to 6, the picker 41 comprises a pair of
left and right arms 57 each having a semicircular holding part 57A at a tip end thereof,
and the pair of arms 57 are opened and closed by an open/close mechanism 58.
[0045] The holding parts 57A of the arms 57 are dimensioned so that the inner diameter of
the circle formed by the holding parts 57A closed together is slightly larger than
the outer diameter of the barrel 3A of the container 3. The arms 57 are opened and
closed by the open/close mechanism 58 and raised and lowered by the raising and lowering
mechanism 55 between a position where the lower ends of the holding parts 57A is located
at substantially the same level as the lower end of the mandrel 23 (a raising limit
position, see the imaginary line in Figure 4) and a position where the lower ends
of the holding parts 57A is located at a level higher than and close to the mounting
surface of the mount 4 (a lower limit position, see Figure 5).
[0046] The vertical dimension of the holding parts 57A is shorter than the vertical dimensions
of the full label FL and the half label HL as shown in Figures 8 and 9. Therefore,
when the outer periphery of the lower end of the full label FL or the half label HL
is held by the holding parts 57A of the picker 41, a part of the label extends off
the upper edge of the holding parts 57A, whether the label is the full label FL or
the half label
FL.
[0047] As shown in Figure 6, a plurality of suction holes 57B are formed in the inner surface
of the holding parts 57A of the picker 41 and are in communication with suction means
(not shown) via a tube (not shown) connected to the outside of the arms 57. If the
suction means is activated in the state where the picker 41 is closed, and the film
label 2 in the cylindrical shape on the mandrel 23 is surrounded by the holding parts
57A located outside of and close to the film label 2, a negative pressure is exerted
on the suction holes 57B in the holding parts 57A. Because of the negative pressure,
the film label 2 in the cylindrical shape are sucked and held to the holding parts
57A of the picker 41.
[0048] Next, the open/close mechanism 58 that opens and closes the arms 57 of the picker
41 will be described. The open/close mechanism 58 comprises a supporting plate 61
that is provided with the arms 57 and is raised and lowered by the raising and lowering
mechanism 55, an open/close rod 62 that is disposed to vertically penetrate the lowest
plate 34 and is coupled to a base part of one of the arms 57 at the upper end part
thereof, a lever 63 that rotates the open/close rod 62, a second cam follower 64 provided
on a tip end of the lever 63, and a second cam 65 that is fixed to the base 31 and
engaged with the second cam follower 64.
[0049] The two arms 57 each have a gear 57C in a base part thereof, and the gears 57C are
engaged with each other (see Figure 6). Therefore, when one of the arms 57 rotates
by the action of the open/close rod 62, the other arm 57 also rotates in association
with the arm 57, and the holding parts 57A are opened and closed, that is, the picker
41 is opened and closed.
[0050] As shown in Figure 5, a stepped cylindrical sleeve 67 is rotatably fitted in a through-hole
in the plate 34 with a bearing 66 interposed therebetween. The outer periphery of
the open/close rod 62 is fitted into a spline groove in the inner surface of the sleeve
67. As a result, the open/close rod 62 can be raised and lowered with respect to the
sleeve 67 but cannot rotate with respect to the sleeve 67. That is, the open/close
rod 62 and the sleeve 67 integrally rotate by the action of the bearing 66. The lever
63 is coupled to the lower end of the sleeve 67, and the second cam follower 64 is
attached to the tip end of the lever 63.
[0051] The open/close mechanism 58 is configured as described above. As the labeler main
unit 5 rotates, when the second cam follower 64 is engaged with the second cam 65,
the lever 63 swings to rotate the open/close rod 62 along with the sleeve 67. By this
rotation, the pair of arms 57 and the holding parts 57A are opened and closed by the
action of the two gears 57C. In this way, as the labeler main unit 5 rotates, the
picker 41 is opened and closed by the open/close mechanism 58 in a predetermined region
of the conveyance path of the container 3.
[0052] Next, the raising and lowering mechanism 55 that raises and lowers the picker 41
will be described. As shown in Figures 2 to 5, the raising and lowering mechanism
55 comprises a raising and lowering rod 71 that is disposed to vertically penetrate
the lowest plate 34 and coupled to the supporting plate 61 at the upper end part thereof,
a sliding member 72 coupled to the lower end of the raising and lowering rod 71, a
slide rail 73 that is fixed to the plate 34 and guides raising and lowering of the
sliding member 72, a third cam follower 74 provided on the sliding member 72, and
a third cam 75 that is disposed to surround the central shaft 32 and engaged with
the third cam follower 74.
[0053] As the labeler main unit 5 rotates clockwise, the third cam follower 74 and the sliding
member 72 are raised and lowered along a cam groove of the third cam 75, and therefore,
the picker 41 is also raised and lowered between the lower limit position at which
the picker 41 surrounds the barrel 3A of the container 3 on the mount 4 and the raising
limit position at which the picker 41 surrounds the outer periphery of the lower end
of the mandrel 23 as shown by the imaginary line in Figures 2 and 4.
[0054] In this embodiment, the film label 2 cut to a predetermined length is shaped into
a cylindrical shape to surround the outer periphery of the mandrel 23, the picker
41 then holds the film label 2 in the cylindrical shape and fits the film label 2
around the barrel 3A of the container 3. In this respect, it is convenient that the
picker 41 can be used to fit both the film label 2 having the longer vertical dimension
(full label FL) and the film label 2 having the shorter vertical dimension (half label
HL) around the container 3, even if the barrels 3A of the containers 3 have the same
outer diameter.
[0055] To this end, in this embodiment, in the fitting section E in which the pickers 41
sucks and holds the outer peripheries of the lower ends of the film labels 2 in the
cylindrical shape and fits the film labels 2 around the containers 3, the adjustment
mechanism 56 is provided to change the level of the lowering limit of the picker 41
depending on whether the picker 41 is to fit the full label FL around the barrel 3A
of the container 3 in such a manner that the lower end of the full label FL covers
the lower end of the barrel 3A of the container 3 or the picker 41 is to fit the half
label HL around the barrel 3A of the container 3 in such a manner that the lower end
of the half label HL covers a part above the lower end of the barrel 3A of the container
3 (see Figures 1 and 7).
[0056] Figure 7 schematically shows the third cam 75 and the adjustment mechanism 56. The
third cam 75 comprises a single cam groove as a movement path in the other region
than the fitting section E.
[0057] On the other hand, in the fitting section E, the third cam 75 comprises a lower first
cam groove 82A that constitutes a path for the full label FL and a lower second cam
groove 82B that constitutes a path for the half label HL, which are switchable.
[0058] The adjustment mechanism 56 comprises a cam plate 82 in which the two different cam
grooves described above are formed, and an air cylinder 83 that raises the cam plate
82 to the upper position for the full label FL and lowers the cam plate 82 to the
lower position for the half label HL in an alternate manner.
[0059] When the air cylinder 83 positions the cam plate 82 at the upper position, the third
cam follower 74 is raised and lowered along the first cam groove 82A in the fitting
section E. Therefore, the amount of vertical movement of the picker 41 in the fitting
section E is at the maximum. More specifically, the picker 41 moves between the raising
limit position and the position of the lower end of the outer periphery of the barrel
3A of the container 3 on the mount 4 (the lower limit position).
[0060] On the other hand, when the air cylinder 83 positions the cam plate 82 at the lower
position as shown in Figure 7, the third cam follower 74 is raised and lowered along
the second cam groove 82B. Therefore, the amount of vertical movement of the picker
41 in the fitting section E is smaller. More specifically, the picker 41 moves between
the raising limit position and the lowering limit position, which is at the level
of the middle of the barrel 3A of the container 3 on the mount 4 (see Figure 9(e)).
[0061] At the raised position shown in Figure 7, the picker 41 is only lowered to the middle
of the barrel 3A of the container 3 when the picker 41 is to hold the film label in
the cylindrical shape and fit the film label around the barrel 3A (see Figure 9(e)).
Therefore, in this case, the half label HL is fitted around the part of the barrel
3A of the container higher than the middle thereof. That is, the lower end of the
half label HL is located above the lower end of the barrel 3A of the container 3.
[0062] In this state where the half label HL covers the part of the barrel 3A of the container
3 higher than the middle thereof, if the introduction of the negative pressure to
the picker 41 is stopped to release the half label HL, the half label HL may fall
to the lower end of the outer periphery of the barrel 3A of the container 3 or may
be tilted even if it does not fall.
[0063] To avoid this, in this embodiment, a hot air blower nozzle 84 is provided to temporarily
secure the half label HL once fitted around the barrel 3A of the container 3 to the
barrel 3A when the picker 41 fits the half label HL around the barrel 3A. That is,
as temporarily securing means, the hot air blower nozzle 84 facing to the container
3 on the mount 4 is disposed on the outer side of the fitting section E of the labeler
main unit 5. When the picker 41 fits the film label 2 (half label HL) in the cylindrical
shape around the upper part of the barrel 3A of the container 3, the hot air blower
nozzle 84 blows hot air to a part of the half label HL on the container 3 higher than
the part held by the picker 41. This causes the upper part of the half label HL to
shrink and be temporarily secured to the upper part of the barrel 3A of the container
3. The half label HL temporarily secured in this way does not fall along the barrel
3A or is not tilted even if the picker 41 releases the half label HL.
[0064] When the film label 2 to be fitted around the barrel 3A of the container 3 is the
full label FL, the full label FL is fitted around substantially the whole of the barrel
3A of the container 3, and the lower end of the full label FL abuts against the mounting
surface of the mount 4 (see Figure 5). Therefore, when the picker 41 fits the full
label FL around the container 3, the hot air blower nozzle 84 as the temporarily securing
means is not activated.
[0065] As an alternative to the heating means as the temporarily securing means, such as
the hot air blower nozzle 84, a fine spray of water may be ejected to temporarily
secure the half label HL by the action of the surface tension of the water. That is,
any means that can temporarily secure the half label HL to the barrel 3A of the container
3 can be used.
[0066] In the following, an operation of the film label fitting apparatus 1 configured as
described above fitting the film label 2 around the barrel 3A of the container 3 will
be described. As described above, according to this embodiment, the film label 2 having
the longer vertical dimension (full label FL) and the film label 2 having the shorter
vertical dimension (half label HL) can be fitted around the containers 3 having the
same outer diameter. In this respect, an operation of fitting the full label FL around
the container 3 will be first described, and an operation of fitting the half label
HL around the container 3 will be then described.
[0067] First, in the raising and lowering mechanism 55 that raises and lowers the picker
41, the adjustment mechanism 56 shown in Figure 7 raises the cam plate 82 so that
the third cam follower 74 is engaged with the second cam groove 82A of the cam plate
82.
[0068] Next, in the state where the labeler main unit 5 is rotating clockwise, the feeding
star wheel 11 feeds the containers 3 onto the mounts 4 in the feed position A in Figure
1 (see Figures 1 and 8(a)).
[0069] At this point, the supporting member 37 is retracted above the container 3 by the
action of the first cam 54, and the picker 41 is also retracted to the level of the
lower end of the outer periphery of the mandrel 23 by the action of the third cam
75 and is in the open state.
[0070] After that, the container 3 passes through the feed position A as the labeler main
unit 5 rotates, and then, the supporting member 37 is lowered by the action of the
first cam 54 and is fitted onto the mouth 3B of the container 3, and the container
3 is vertically held between the mount 4 and the supporting member 37 (see Figure
8(b)).
[0071] As the container 3 then moves to an upstream position close to the label feed position
C, the picker 41 is lowered to the level of the mouth 3B of the container 3 by the
action of the third cam 75 (see Figure 8(c)).
[0072] At this point, the second cam 65 of the open/close mechanism 58 that opens and closes
the picker 41 maintains the picker 41 in the open state, and therefore, there is a
clearance between the container 3 and the picker 41.
[0073] On the other hand, the label feeding means 12 is in the waiting state after the rotary
cutter 22 cuts the film label 2 fed by the feed roller 21 to a predetermined length,
the film labels 2 having the predetermined length (full label FL) are held on the
outer surface of the feeding drum 24, and the applying roller 25 applies the UV curing
adhesive to the rear end of each full label FL (see Figure 2).
[0074] The container 3 and the mandrel 23 above the container 3 then reach the label feed
position C, the servo motor 44 makes the mandrel 23 rotate. At this point, the suction
holes 23A of the mandrel 23 are in communication with the operating suction means
via the negative pressure pipe 43, so that the feeding drum 24 releases the full label
FL and passes the full label FL to the mandrel 23 in such a manner that the lower
end of the full label FL is located at substantially the same level as the lower end
of the mandrel 23. Since the mandrel 23 is revolving, the full label FL passed to
the mandrel 23 wraps around the outer surface of the mandrel 23 and is sucked and
held thereto (see Figure 8(c)). Furthermore, the front end and the rear end of the
full label FL are overlaid one on another, and the UV curing adhesive bonds the front
end and the rear end overlaid one on another. That is, the film label 2 held on the
outer surface of the mandrel 23 has a cylindrical shape.
[0075] The container 3 then moves to the hardening position D as the labeler main unit 5
rotates, the UV irradiating means 26 emits UV rays to the overlaid front and rear
ends (UV curing adhesive) of the full label FL in the cylindrical shape held on the
mandrel 23 (see Figures 1 and 8(c)). Then, the front and rear ends of the full label
FL are firmly bonded to each other by the hardened UV curing adhesive, and the full
label FL in the cylindrical shape is held on the outer surface of the mandrel 23.
[0076] As the container 3 passes through the hardening position D, the picker 41 is raised
by the action of the third cam 75 until the lower end of the picker 41 is at substantially
the same level as the lower end of the full label FL held on the mandrel 23 (the raising
limit position), and the picker 41, which has been open, is closed by the action of
the open/close mechanism 58 (see Figure 8(d)).
[0077] Once the picker 41 is closed, the suction holes 57B of the picker 41 come into communication
with the operating suction means, so that the picker 41 sucks the full label FL, and
the communication between the suction holes 23A of the mandrel 23 and the suction
means is cut off. As a result, the full label FL is released from the mandrel 23,
and the outer periphery of the lower end of the full label FL is sucked and held to
the holding parts 57A of the picker 41 (see Figure 8(d)).
[0078] As the container 3 then moves to the fitting section E, the third cam follower 74
moves along the first cam groove 82A of the cam plate 82, so that the picker 41 holding
the full label FL is lowered to the lower limit position on the mount 4, and thus
the lower end of the full label FL is lowered to the lower end of the barrel 3A of
the container 3 (see Figures 1 and 8(e)). As a result, the full label FL in the cylindrical
shape held by the picker 41 is fitted around the whole of the barrel 3A of the container
3.
[0079] In the case where the full label FL is fitted around the barrel 3A of the container
3 as described above, the lower end of the full label FL abuts against the mounting
surface of the mount 4. Therefore, in the case where the full label FL is fitted around
the container 3, the hot air blower nozzle 84 is not activated.
[0080] As the container then passes through the fitting section E, the communication between
the suction holes 57B of the picker 41 and the suction means is cut off, and the picker
41 is opened by the open/close mechanism 58. Once the picker 41 releases the full
label FL in this way, the picker 41 is then raised by the action of the third cam
75 until the lower end of the picker 41 is substantially at the level of the lower
end of the mandrel 23 (the raising limit position), and is retracted above the container
3 (see Figure 8(f)).
[0081] When the container 3 around which the full label FL in the cylindrical shape is fitted
then reaches the discharge position B, the supporting member 37 is raised by the action
of the first cam 54 and is separated from the mouth 3B of the container 3, and the
container 3 is discharged off the mount 4 and passed to the discharging conveyer 16
by the discharging star wheel 13 (see Figures 1 and 8(g)).
[0082] In this way, the film label 2 having the longer vertical dimension (full label FL)
is shaped into the cylindrical shape and then fitted around the barrel 3A of the container
3.
[0083] The container 3 around which the full label FL is fitted is then fed to a shrink
tunnel (not shown) by the discharging conveyer 16, where the full label FL is heated
to shrink and be tightly fitted on the barrel 3A of the container 3 (see Figure 1).
[0084] Next, an operation of the film label fitting apparatus 1 fitting the film label 2
having the shorter vertical dimension (half label HL) around the upper part of the
barrel 3A of the container 3 will be described.
[0085] In this case, first, the film label 2 in the label feeding means 12 is replaced with
the half label HL. At the same time, the adjustment mechanism 56 in the fitting section
E lowers the cam plate 82 so that the second cam groove 82B is engaged with the third
cam follower 74 (see Figure 7). As a result, in the fitting section E, the picker
41 holding the lower end of the outer periphery of the half label HL fits the half
label HL around the barrel 3A of the container 3 on the mount 4 with the lower end
of the half label HL lowered to the level close to the middle of the barrel 3A, which
is higher than the lower end of the barrel 3A (see figs, 9(d) and 9(f)).
[0086] In addition, in the fitting section E, the hot air blower nozzle 84 blows hot air
to an upper part of the half label HL fitted around the barrel 3A of the container
3 (see Figure 9(e)). As a result, the upper part of the half label HL fitted around
the barrel 3A of the container 3 shrinks and is temporarily secured to the upper end
of the barrel 3A of the container 3.
[0087] The raising and lowering operation and the opening and closing operation of the picker
41, the operation of the mandrel 23 and the raising and lowering operation of the
supporting member 37 in the region other than the fitting section E are the same as
those in the above-described case where the full label FL is fitted around the container
3, and detailed descriptions of those operations will be omitted (see Figures 9(a)
to 9(g)).
[0088] In the case where the half label HL is fitted around the container 3, as in the case
of the full label FL, the half label HL is sucked and held to the outer periphery
of the lower end of the mandrel 23 with the lower end of the half label HL being at
substantially the same level as the lower end of the mandrel 23 and thereby shaped
into a cylindrical shape (see Figure 9(d)). The picker 41 then sucks and holds the
outer periphery of the lower end of the half label HL in the cylindrical shape on
the mandrel 23 (see Figure 9(d)) and is lowered along the second cam groove 82B of
the cam plate 82, thereby fitting the half label HL around the part of the barrel
3A of the container 3 higher than the middle thereof (see Figures 9(d) to 9(f)).
[0089] In the case where the picker 41 fits the half label HL around the container 3 as
described above, since the vertical dimension of the half label HL is approximately
a half of the vertical dimension of the full label FL described earlier, so that a
negative pressure leakage occurs through the suction holes 24A in the upper part of
the feeding drum 24 holding the half label HL and through the section holes 23A in
the upper part of the mandrel 23 holding the half label HL. However, according to
this embodiment, the half label HL is held on the outer periphery of the feeding drum
24 and the mandrel 23 while allowing for the negative pressure leakage through the
suction holes 24A in the upper part of the feeding drum 24 and the suction holes 23A
in the upper part of the mandrel 23.
[0090] In handling of the half label HL, the negative pressure leakage through the suction
holes 24A in the upper part of the feeding drum 24 and the suction holes 23A in the
upper part of the mandrel 23 may be prevented. In that case, for example, the communication
state of the negative pressure channel (not shown) that connects the suction holes
24A in the upper part of the feeding drum 24 and the suction holes 23A in the upper
part of the mandrel 23 to the suction means can be switched by an electromagnetic
switching valve depending on the dimension of the half label HL.
[0091] According to this embodiment described above, the raised position of the picker 41
does not change, whether the picker 41 is to fit the full label FL and the half label
HL around the container 3, and the lowered position (fitting level) of the picker
41 can be changed by the adjustment mechanism 56 switching the level of the cam plate
82 between the raised position and the lowered position, whether the picker 41 is
holding the outer periphery of the lower end of the full label FL or the half label
HL. Thus, the single apparatus can handle both the full label FL and the half label
HL and fit the labels around the containers 3 having the same outer diameter.
[0092] Therefore, the film label fitting apparatus 1 provided according to this embodiment
is highly versatile.
[0093] Although the picker 41 holds the outer periphery of the lower end of the full label
FL and the half label HL in this embodiment, the present invention is not limited
thereto, and the picker 41 may hold the outer periphery of a part of the film label
slightly above the lower end thereof to fit the film label around the container 3.
However, the picker 41 preferably holds the outer periphery of the lower end of the
full label FL and the half label HL, because the possibility of failures, such as
the film label 2 being caught on the container 3 and curling up during fitting, can
be minimized.
[0094] Furthermore, although the mandrel 23 is disposed above the mount 4, and the picker
41 carries the film label 2 in the cylindrical shape downward and fits the film label
2 around the container 3 from above in this embodiment, the present invention is not
limited to this arrangement, and the mandrel 23 and the picker 41 may be disposed
below the mount 4, and the picker 41 may carry the film label 2 in the cylindrical
shape upward and fit the film label 2 around the container 3 from below. In that case,
the picker 41 sucks and holds the outer periphery of the upper end of the film label
2 in the cylindrical shape on the mandrel 23, and the diameters of the mount 4 and
the mandrel 23 are slightly larger than the diameter of the container 3 to be handled.
[0095] In the first embodiment described above, a cam mechanism is used as the raising and
lowering mechanism 55 for raising and lowering the picker 41. However, the raising
and lowering mechanism 55 for raising and lowering the picker 41 may be a servo motor-driven
mechanism or a linear drive mechanism such as one shown in Figure 10. More specifically,
as shown in Figure 10, a vertical raising and lowering guide 107 is disposed so as
to extend from a mount 104 to the level of a mandrel 123, and a supporting member
108 is attached to the raising and lowering guide 107 in such a manner that the supporting
member 108 can be raised and lowered. Furthermore, a picker 141 having a pair of left
and right arms 157 is attached to the supporting member 108 in such a manner that
the picker 141 can be opened and closed. In this embodiment, the picker 141 can be
raised and lowered by a linear drive source 109 raising and lowering the supporting
member 108, and the level of the lowering limit of the picker 141 can be switched
depending on whether the full label FL or the half label HL is handled in the fitting
section E described above.
[0096] In the embodiment shown in Figure 10, a rotary actuator 128 and a pair of gears 129
provided on base parts of the arms 157 are used to open and close the arms 157 of
the picker 141. The picker 141 can be opened and closed at a desired position by the
rotary actuator 128 rotating the gears 129. In the embodiment shown in Figure 10,
components corresponding to those in the first embodiment described earlier are denoted
by the same reference numerals plus 100. The embodiment shown in Figure 10 can provide
the same effects and advantages as those of the first embodiment described earlier.
[0097] In the embodiments described above, the UV curing adhesive is used to bond the front
and rear ends of the film label 2. As an alternative, however, the front and rear
ends of the film label 2 may be bonded to each other with a hot melt adhesive or laser.
Reference Signs List
[0098]
- 1
- film label fitting apparatus
- 2
- film label
- FL
- full label
- HL
- half label
- 3
- container
- 3A
- barrel
- 4
- mount
- 5
- labeler main unit (rotator)
- 23
- mandrel
- 37
- supporting member
- 41
- picker