Technical Field
[0001] The present invention relates to a cloth spreading and carrying device and method
for spreading cloth, such as cloth having a large area, and carrying the cloth in
the spread state to a device in a next process, such as a press or a folder. Notice
that the word "cloth" used in the present invention means rectangular cloth represented
by sheets and towels.
Background art
[0002] When washing a large number of cloths, the washed cloths are successively subjected
to dehydrating, drying, pressing and folding processes, for example, while the cloths
are carried along a certain line. In the pressing process, particularly, the cloth
has to be inserted into the line in a state properly spread in advance. However, the
operation of spreading the large-sized cloths and inserting them into the line without
disorders one by one is hard to perform and imposes a large physical load on a worker
when manually performed.
[0003] To avoid such a problem, a known spreading and carrying device is proposed in which
cloth is treated through the steps of grasping cloth by clamps at both corner regions
thereof, moving the cloth upward by an ascending/descending means, re-grasping the
cloth at both the corner regions thereof by other clamps to laterally spread the cloth,
delivering the spread cloth to a conveyor for carrying it to a next process, and rotating
the conveyor to carry the cloth to the next process (see, for example, Patent Document
1).
[0004] The device disclosed in Patent Document 1, however, has the problem as follows. Until
the lowermost end of the cloth having been delivered from the spreading clamps onto
the conveyor is moved out from a start end portion of the conveyor, a inserting device
and an spreading device cannot be brought into the operation for moving the next cloth
and they are kept in a standby state for the purpose of matching in delivery timing.
Accordingly, there occurs a time lag from the timing at which the next cloth is grasped
by the inserting device to the timing at which it is spread in front of the conveyor
by the spreading device. The occurrence of such a time lag reduces the device treatment
capability. Further, because the time lag is changed depending on the width of the
cloth, the standby time is also changed and control becomes complicated.
[0005] In addition, when the cloth is delivered from the spreading clamps onto the conveyor,
the cloth is sucked onto a conveyor belt by a suction force from a state where the
cloth is hanged from the clamps while being held at both the corner regions thereof.
Therefore, the hanging cloth comes into a slacked state at its upper side portion
due to the gravity imposed on the cloth itself and the suction force, and is moved
onto the conveyor from such a slacked state. This often raises the problem that the
upper side portion of the cloth is disordered and the upper side of the cloth is not
straightly positioned on the conveyor.
[0006] In view of the above-described situation, the inventor previously proposed a device
for solving the problem of the time lag by employing a carrying device provided with
a suction box which has a large number of suction small holes formed in an upper surface
of the suction box, and for solving the problem of slacking of the cloth with the
provision of a vacuum belt (Patent Document 2).
[0007] Further methods and devices for spreading and carrying cloth are shown in Patent
Documents 3 to 5.
Disclosure of the Invention
Problem to be Solved by the Invention
[0009] In this application, the inventor intends to solve the problem of improving the treatment
performance and the quality of the device proposed in Patent Document 2 so as to overcome
its drawbacks.
[0010] The first drawback is that because receiving-side chucks are used to perform not
only a step of fetching the cloth, but also a step of spreading the cloth, the cloth
cannot be received from other inserting-side chucks until the spreading step is completed,
and therefore a longer waiting time is needed.
[0011] The second drawback is that when the bottom of the cloth is sucked to supply the
spread cloth in a state free from wrinkles to the carrying device, the upper side
portion of the spread cloth comes down by the sucking action and gets out of the shape,
thus resulting in a risk of deterioration of quality.
[0012] The third drawback is a risk that if the cloth is not sufficiently sucked by the
carrying device when it is delivered from the spreading device to the carrying device,
the cloth is sometimes dislocated and is dropped in the worst case. It is conceivable
to overcome this drawback by providing a device for retaining and fixing the upper
side portion of the cloth after spreading it. However, because such a solution requires
receiving-side chucks to receive the cloth in a position opposed to the plurality
of inserting-side chucks, there is a difficulty in ensuring a space for installation
of the retaining and fixing device.
[0013] The fourth drawback is a risk that when the cloth is transferred from the delivery
device to the carrying device, the upper side portion of the cloth is not completely
transferred and is turned over if the difference speed between the delivery device
and the carrying device is not sufficient.
[0014] An object of the present invention is to overcome the above-described drawbacks and
to provide a device and a method for spreading and carrying cloth with higher treatment
performance and higher quality. Means for achieving the object
[0015] As means for achieving the above object, a method of the present invention has features
stated in (1) to (6) given below.
- (1) A method for spreading and carrying cloth, the method comprising the steps of
carrying the cloth upward by an inserting device while grasping the cloth at both
corner regions on one side thereof; receiving the cloth from the inserting device
by a transverse chuck and carrying the cloth to a center position along a first rail
disposed to lie in the right-to-left direction; receiving the cloth from the transverse
chuck by a delivery device and delivering the cloth to a spreading device; laterally
spreading the cloth received from the delivery device by the spreading device, which
is formed of a pair of chucks movable along a second rail disposed to lie in the right-to-left
direction, by separating the pair of chucks away from each other; spreading the laterally
spread cloth in the vertical direction by an air suction device; receiving the cloth
from the spreading device by the horizontally moving device and delivering the cloth
to a carrying device; and carrying the cloth to a next process by the carrying device.
- (2) In the method for spreading and carrying cloth stated in above (1), the horizontally
moving device preferably fixedly holds a hanging portion of the cloth by cooperation
with an upper end fixing bar held in a forwardly moved position and receives the cloth
from the spreading device while blowing air to an upper side portion of the cloth.
- (3) In the method for spreading and carrying cloth stated in above (2), the air suction
device preferably spreads the cloth in the vertical direction when the horizontally
moving device fixedly holds the hanging portion of the cloth.
- (4) In the method for spreading and carrying cloth stated in any one of above (1)
to (3), the delivery device preferably has a pair of grasping portions each comprising
an outer chuck and an inner chuck, the grasping portions receiving the cloth from
the transverse chuck, and the delivery device delivers the cloth to the spreading
device after swinging each outer chuck outward to stretch each of both the corner
regions of the cloth over a certain width.
- (5) In the method for spreading and carrying cloth stated in any one of above (1)
to (4), the carrying device preferably has a rotating speed at a position in which
the cloth first comes into the carrying device to be slower than a rotating speed
at a position in which the cloth is carried.
- (6) In the method for spreading and carrying cloth stated in any one of above (1)
to (5), after delivering the cloth to the delivery device, the transverse chuck preferably
is immediately moved to a position opposed to another inserting device.
[0016] As means for achieving the above object, the present invention provides a device
having features given below. A device for spreading and carrying cloth, according
to the present invention, comprises an inserting device carrying the cloth upward
to a position higher than the height of a worker while grasping the cloth at both
corner regions on one side thereof; a transverse chuck receiving the cloth from the
inserting device and moving the cloth to a center position of a device frame along
a first rail disposed to lie in the right-to-left direction; a delivery device receiving
the cloth from the transverse chuck and delivering the cloth to a spreading device;
the spreading device disposed at the center position of the device frame, receiving
the cloth from the delivery device, and laterally spreading the cloth along a second
rail disposed to lie in the right-to-left direction; an air suction device disposed
substantially below the spreading device and spreading the laterally spread cloth
in the vertical direction; a horizontally moving device receiving the cloth from the
spreading device and delivering the cloth to a carrying device; and the carrying device
receiving the cloth from the horizontally moving device and carrying the cloth to
a next process.
[0017] The inserting device comprises a inserting chuck having a pair of grasping portions,
and an ascending/descending slide cylinder capable of carrying the cloth upward to
a position higher than the height of a worker. The grasping portions of the inserting
chuck are each constituted by a pair of spring-biased clips. The cloth is inserted
into the inserting device such that one pair of grippers of the inserting chuck holds
one corner region of the cloth in a state where the cloth is stretched in a certain
width, and the other pair of grippers of the inserting chuck holds the other corner
region of the cloth on one same side thereof as the one corner region in a state where
the cloth is stretched in a certain width. The inserting device is provided in plural
to increase the treatment capability.
[0018] In the present invention, when the cloth is relayed in the order of the inserting
chuck → the transverse chuck → the center chucks → the spreading chucks, the upper
side portion of the cloth in an area used for such relayed delivery is required to
be stretched by each pair of chucks. This is because, unless the delivery of the cloth
is performed with the corner regions of the cloth kept in a stretched state, there
is a risk that the cloth is delivered in a skewed state. Also, because the width of
the cloth stretched by the chuck on the delivered side is reduced when the cloth is
delivered from one chuck to another chuck, the width of each stretched corner region
grasped by the inserting chuck is required to be designed to have such a size as ensuring
that a sufficient width of the stretched corner region is given to the next chuck
until reaching the final chuck.
[0019] The transverse chuck is movable to the right and the left along the first rail disposed
to lie in the right-to-left direction of the device frame. The transverse chuck is
moved to a position opposed to the inserting device for receiving the cloth from the
inserting chuck, and then carries the received cloth to a center position in the device
frame. The transverse chuck has a pair of grasping portions which are disposed respectively
at opposite corner regions on a lower side of the transverse chuck and are each constituted
by a pair of clips. The grasping portions of the transverse chuck in each pair are
spaced at a smaller width than each pair of the grasping portions of the inserting
chuck such that, at the delivery of the cloth, the pair of the grasping portions of
the transverse chuck come into between the corresponding pair of the grasping portions
of the inserting chuck in a parallel relation.
[0020] In the known device shown in Patent Document 2, the chuck on the receiving side serves
to perform not only the receiving step, but also the spreading step. In the present
invention, the transverse chuck serves to perform only the receiving step, thus enabling
the receiving step and the spreading step to be performed in parallel. The reason
why four clips in total are disposed in the grasping portions of the transverse chuck
is in enabling the opposite corner regions of the cloth to be kept in the stretched
state when the cloth is delivered to the center chucks. The provision of the four
clips in total has another advantage that the cloth is hard to shift out of place
even when heavy cloth is laterally moved at a high speed.
[0021] The delivery device is positioned in the central area of the device frame and delivers
the cloth held by the transverse chuck to the spreading chucks. The delivery device
comprises a pair of arms pivotally mounted to the device frame, inner center chucks
and outer center chucks disposed at fore ends of the arms, a pair of center chuck
swinging cylinders for swinging and moving the arms from positions opposed to the
transverse chuck to positions opposed to the spreading chucks, center chuck actuating
cylinders for opening and closing the respective center chucks, and center chuck spacing
cylinders for adjusting the degrees of respective openings of the inner center chucks
and the outer center chucks. The inner center chucks generate stronger grasping forces
and have larger-sized grasping claws than the outer center chucks.
[0022] When the outer center chucks are moved outward to space more away from each other,
the outer center chucks grasp the cloth at its corner regions and stretch the opposite
corner regions of the cloth over a certain width in cooperation with the inner center
chucks. In order to avoid excessive forces from acting on the cloth at that time,
the grasping forces of the outer center chucks are preferably set to be weaker than
those of the inner center chucks. Additionally, in order to reduce driving forces
of center chuck actuating cylinders, the grasping claws of the outer center chucks
are preferably formed to be smaller than those of the inner center chucks.
[0023] In the present invention, when the cloth is relayed in the order of the inserting
chuck → the transverse chuck → the center chucks → the spreading chucks, the grasped
positions of the cloth are gradually shifted inward. However, because the corner regions
of the cloth are grasped by spacing the outer center chucks more away from each other,
the cloth can be delivered to the spreading chucks while being grasped at the corner
regions thereof so that the cloth is fully spread from one end to the other end.
[0024] Further, with the provision of the delivery device, the transverse chuck can be moved
to a position opposed to another inserting device without waiting for the end of the
spreading step of the cloth.
[0025] The spreading device comprises the spreading chucks in the form of a pair of grippers
provided on the second rail which is arranged to lie in the right-to-left direction
of the device frame, spreading chuck actuating cylinders for opening and closing the
spreading chucks, and right and left spreading chuck sliding motors for moving the
spreading chucks to the right and the left. By operating the spreading chuck sliding
motors forward or backward, the right and left spreading chucks can be moved along
the second rail in a direction spacing away from each other or a direction coming
closer to each other. The upper end fixing bars are positioned just below the spreading
device at the same height as the horizontally moving member in an opposed relation
and have a gap formed in a central area between the bars, which allows passage of
the cloth through it. When the cloth is delivered from the spreading chucks to the
horizontally moving member, the cloth is held between the upper end fixing bars and
the horizontally moving member.
[0026] Since the spreading device just performs a very simple operation of receiving the
cloth and spreading it, complicated operation control is not required. Further, the
step of receiving the cloth by the transverse chuck can be performed in parallel to
the spreading step.
[0027] Preferably, the air suction device is installed below the spreading device and comprises
a vacuum box having a suction port formed at a top thereof, an air suction fan for
sucking air in the vacuum box, and leading rollers disposed on the front side near
the suction port of the vacuum box (above a front wall). The leading rollers are disposed
on the front side near the suction port of the vacuum box (above a front wall). The
air suction fan is operated when the upper side portion of the cloth is fixedly held
by the upper end fixing bars and the horizontally moving member, the upper end fixing
bars being positioned at the height in an opposed relation to the horizontally moving
member just below the spreading chucks. Substantially at the same timing, the leading
rollers are rotated in a feed direction at a high speed by leading roller motors such
that a lower portion of the cloth is sucked into the vacuum box and the cloth is spread
in the vertical direction.
[0028] In the present invention, since the upper side portion of the cloth is fixedly held
when the cloth is sucked into the vacuum box, it is possible to eliminate the problem
that the upper side portion of the cloth is excessively withdrawn downward by the
suction and is deformed from the properly spread shape.
[0029] The horizontally moving device preferably comprises the horizontally moving member
moving above a transfer conveyor toward and away from the upper end fixing bars, a
vacuum motor causing a suction force to act in a suction box formed on the horizontally
moving member, a horizontally moving member cylinder for horizontally moving the horizontally
moving member, and right and left air blowers disposed adjacent respectively to the
right and left upper end fixing bars and having a gap formed in a central area between
the air blowers, which allows passage of the cloth grasped by the center chucks through
it. The horizontally moving member has a length in the right-to-left direction corresponding
to a maximum width of cloths to be treated, and the suction box having a large number
of small holes is formed on an upper surface of the horizontally moving member at
a front end portion thereof. By sucking air in the horizontally moving member with
the operation of the vacuum motor, the upper side portion of the cloth can be attracted
onto the upper surface of the horizontally moving member. When the horizontally moving
member cylinder is in its contracted state, the horizontally moving member is positioned
substantially just below the spreading chucks, and when the horizontally moving member
cylinder is spread, the horizontally moving member is moved toward the inner or rear
side at a high speed.
[0030] By delivering the cloth from the spreading chucks to the horizontally moving member
while blowing air toward the upper side portion of the cloth in the state where the
cloth is held between the upper end fixing bars and the horizontally moving member,
drop or downward displacement of the cloth caused in the delivery step can be minimized.
[0031] The carrying device preferably comprises the transfer conveyor constituted by a perforated
belt having a large number of small holes formed therein, a peeling-off shaft disposed
in front of the transfer conveyor and rotating at a speed lower than a horizontally
moving speed of the horizontally moving member and a rotating speed of the transfer
conveyor, an air suction passage provided below the transfer conveyor, and a discharge
conveyor disposed in continuation with the transfer conveyor. A trailing end portion
of the discharge conveyor is continued to a inserting conveyor on the press side.
[0032] The air suction passage is communicated with the vacuum box, and the switching damper
enables a suction force to selectively act in any of the vacuum box and the air suction
passage. When the cloth is carried, a negative pressure is caused to generate in the
air suction passage so that the cloth having been supplied onto the transfer conveyor
is held under the suction and is surely transported by the transfer conveyor.
[0033] By setting the rotating speed of the peeling-off shaft to be slower than the moving
speed of the horizontally moving member, a sufficient frictional force is generated
due to the speed difference between the moving speed of the horizontally moving member
and the rotating speed of the peeling-off shaft. Therefore, the upper side portion
of the cloth can be smoothly peeled off and transferred onto the carrying device without
being turned over.
[0034] Further, since the rotating speed of the peeling-off shaft is set to be slower than
the rotating speed of the transfer conveyor, a weak frictional force acts on the cloth
when the cloth is transferred from the peeling-off shaft onto the transfer conveyor,
and the cloth is carried in a state of being properly spread in the lengthwise direction.
As a result, the cloth is hard to wrinkle and high quality is ensured.
[0035] In addition, since there is no need of slowing down the speed of the transfer conveyor
in order to maintain the speed difference, the treatment efficiency is increased.
Effect of the Invention
[0036] According to the present invention, since the receiving-side chuck in the known device
shown in Patent Document 2 is separated into the transverse chuck and the spreading
chucks, the receiving step by the transverse chuck and the spreading step by the spreading
chucks can be performed in parallel. Hence the treatment efficiency can be increased.
[0037] Since the outer center chucks are moved outward more away from each other in the
delivery device, the cloth can be surely grasped at the corner regions so that the
cloth is fully spread from one end to the other end.
[0038] Since the upper side portion of the cloth is fixedly held by the upper end fixing
bars, there is no risk that the upper side portion of the cloth is excessively withdrawn
downward by the suction and is deformed from the properly spread shape. Accordingly,
a high-quality finished state can be always obtained. In particular, a more significant
effect can be obtained when target cloth is large and heavy.
[0039] Further, since the cloth is fixedly held by the upper end fixing bars, the cloth
can be avoided from displacing downward at the time when it is delivered from the
spreading device to the horizontally moving device.
[0040] Since the peeling-off shaft is disposed in front of the transfer conveyor, a sufficient
speed difference can be ensured between the horizontally moving member and the transfer
conveyor. As a result, the upper side portion of the cloth can be avoided from turning
over at the time when the cloth is delivered from the horizontally moving member to
the transfer conveyor.
[0041] In addition, since there is no need of slowing down the speed of the transfer conveyor
in order to maintain the speed difference, the treatment efficiency is increased.
Brief Description of the Invention
[0042]
Fig. 1 is a front view of a cloth spreading and carrying device.
Fig. 2 is a side sectional view of the cloth spreading and carrying device.
Fig. 3 is an explanatory view for explaining the operation when an up-button disposed
in a inserting device is depressed.
Fig. 4 is an explanatory view for explaining the operation when cloth is delivered
from transverse chucks to a delivery device.
Fig. 5 is an explanatory view for explaining the operation of a pre-step in which
the cloth is delivered from the delivery device to an spreading device.
Fig. 6 is an explanatory view (1/2) for explaining the operation when the cloth is
spread by the spreading device in the right-to-left direction.
Fig. 7 is an explanatory view (2/2) for explaining the operation when the cloth is
spread by the spreading device in the right-to-left direction.
Fig. 8 is an explanatory view (1/2) for explaining the operation when the cloth is
spread in the vertical direction and is delivered from the spreading device a horizontally
moving member.
Fig. 9 is an explanatory view (2/2) for explaining the operation when the cloth is
spread in the vertical direction and is delivered from the spreading device to the
horizontally moving member.
Fig. 10 is an explanatory view (1/2) for explaining the operation when the cloth is
delivered from the horizontally moving member to a carrying device.
Fig. 11 is an explanatory view (2/2) for explaining the operation when the cloth is
delivered from the horizontally moving member to the carrying device.
Reference Numerals
[0043]
1 inserting chuck
2 ascending/descending slide cylinder
3 transverse chuck
4 transverse chuck sliding motor
5 inner center chuck
6 outer center chuck
7 center chuck swinging cylinder
8 spreading chuck
9 spreading chuck sliding motor
11 horizontally moving member
12 upper end fixing bar
13 leading roller motor
14 air blower
15 switching damper
16 suction fan
17 vacuum motor
18 transfer conveyor
19 peeling-off shaft
21 first rail
23 second rail
24 vacuum box
25 air suction passage
26 center chuck actuating cylinder
28 spreading chuck actuating cylinder
29 transverse chuck opening/closing cylinder
32 horizontally moving member cylinder
33 leading roller
34 discharge conveyor
51 opening/closing bar
52 release plate
a, b cloth
Best Mode for Carrying out the Invention
[0044] The best mode for carrying out the invention will be described below with reference
to the drawings. Note that, in the following description, the term "front-to-back
direction" means a direction in which cloth as a treatment target is carried, and
the term "right-to-left direction" means a direction perpendicular to the carrying
direction of the cloth.
[0045] A device for spreading and carrying cloth according to the present invention comprises,
as shown in Figs. 1 and 2, an inserting device carrying the cloth upward to a position
higher than the height of a worker while grasping the cloth at both corner regions
on one side thereof, a transverse chuck 3 receiving the cloth from the inserting device
and moving the received cloth to a center position in a device frame along a first
rail 21 disposed to lie in the right-to-left direction, a delivery device receiving
the cloth from the transverse chuck 3 and delivering the cloth to a spreading device,
the spreading device receiving the cloth from the delivery device at a center position
of the device frame and spreading the cloth, an air suction device installed substantially
just below the spreading device, a horizontally moving device receiving the spread
cloth from the spreading device and delivering the cloth to a carrying device, and
the carrying device receiving the cloth held by a horizontally moving member and carrying
the cloth toward a press.
[0046] The inserting device comprises an inserting chuck 1 having a pair of grasping portions,
and an ascending/descending slide cylinder 2 capable of carrying the cloth upward
to a position higher than the height of a worker. The grasping portions of the inserting
chuck 1 are constituted by respective pairs of clips 1a - 1d which are spring biased.
The cloth is inserted into the inserting device such that one pair of grippers 1 a,
1 b of the inserting chuck 1 holds one corner region of the cloth in a state where
the cloth is stretched in a certain width, and the other pair of grippers 1 c, 1 d
of the inserting chuck 1 holds the other corner region of the cloth on one same side
thereof as the one corner region in a state where the cloth is stretched in a certain
width. A release plate 52 is disposed above the ascending/descending slide cylinder
2 such that the release plate 52 comes into abutment against the clips 1a - 1d to
release the cloth at the time when the cloth is delivered.
[0047] In the cloth spreading and carrying device according to the present invention, four
inserting devices are disposed at the front side, thus allowing four workers to perform
the operation of inserting the cloth in front of the respective inserting devices.
When each worker depresses an up-button disposed on the inserting device (or in an
automatic mode), the ascending/descending slide cylinder 2 is operated to raise the
inserting chuck 1. While one inserting chuck 1 is operated to deliver the cloth, the
other inserting chucks 1 are kept on standby at positions lower than the height at
which the cloth is delivered.
[0048] The transverse chuck 3 is movable to the right and the left along the first rail
21 disposed to lie in the right-to-left direction of the device frame. The transverse
chuck 3 is moved to a position opposed to the inserting device for receiving the cloth
from the inserting chuck 1, and then carries the received cloth to a center position
in the device frame. The transverse chuck 3 has a pair of grasping portions which
are disposed respectively at opposite corner regions on a lower side of the transverse
chuck 3 and are each constituted by a pair of clips. The grasping portions of the
transverse chuck 3 in each pair are spaced at a smaller width than each pair of the
grasping portions of the inserting chuck 1 such that, at the delivery of the cloth,
the pairs of the grasping portions (clips 3a - 3d) of the transverse chuck 3 come
into between the corresponding pairs of the grasping portions (clips 1a - 1 d) of
the inserting chuck 1 in a parallel relation.
[0049] An opening/closing bar 51 operated by a transverse chuck opening/closing cylinder
29 is disposed in each of upper portions of the ascending/descending slide cylinders
2 and a central area of the device frame, and the grasping portions of the transverse
chuck 3 can be opened and closed by operating the opening/closing bar 51.
[0050] The delivery device is positioned in the central area of the device frame and delivers
the cloth held by the transverse chuck 3 to spreading chucks 8. The delivery device
comprises a pair of arms pivotally mounted to the device frame, inner center chucks
5 and outer center chucks 6 disposed at fore ends of the arms, a pair of center chuck
swinging cylinders 7 for swinging and moving the arms from positions opposed to the
transverse chuck 3 to positions opposed to the spreading chucks 8, center chuck actuating
cylinders 26 for opening and closing the respective center chucks, and center chuck
spacing cylinders (not shown) for adjusting the degrees of respective openings of
the inner center chucks 5 and the outer center chucks 6. The inner center chucks 5
generate stronger grasping forces and have larger-sized grasping claws than the outer
center chucks 6.
[0051] The inner center chucks 5 and the outer center chucks 6 can be opened and closed
by the center chuck actuating cylinders 26. When the transverse chuck 3 is laterally
moved to a position opposed to the center chucks 5, 6, the outer center chucks 5,
6 are swung by the center chuck swinging cylinders 7 toward the front side closer
to the worker and center chuck actuating cylinders are operated to grasp the cloth.
Further, the grasping portions of the transverse chuck 3 are released by an opening/closing
bar 51 which is operated by the transverse chuck opening/closing cylinder 29, whereby
the cloth is delivered from the transverse chuck 3 to the center chucks 5, 6.
[0052] Upon receiving the cloth, the center chucks 5, 6 are returned to the original swung
position by the center chuck swinging cylinders 7, and the outer center chucks 6 are
moved by the center chuck spacing cylinders to space from each other, thus bringing
each of the opposite corner regions of the cloth into a stretched state over several
centimeters. Then, the center chucks 5, 6 are further swung rearward by the center
chuck swinging cylinders 7 such that the stretched opposite corner regions of the
cloth are grasped by the spreading chucks 8 for the delivery of the cloth.
[0053] The spreading device comprises the spreading chucks 8 in the form of a pair of grippers
provided on a second rail 23 which is arranged to lie in the right-to-left direction
of the device frame, spreading chuck actuating cylinders 28 for opening and closing
the spreading chucks 8, and right and left spreading chuck sliding motors 9 for moving
the spreading chucks 8 to the right and the left. By operating the spreading chuck
sliding motors 9 forward or backward, the right and left spreading chucks 8 can be
moved along the second rail 23 in a direction spacing away from each other or a direction
coming closer to each other.
[0054] The spreading chucks 8 receive the cloth from the center chucks 5, 6 in the center
position of the device frame and are moved along the second rail 23 in opposite directions,
thereby spreading the cloth. More specifically, when the center chucks 5, 6 are moved
to the positions opposed to the spreading chucks 8 while the right and left spreading
chucks 8 are in a state close to each other, the spreading chucks 8 grasp the cloth
with the operation of the spreading chuck actuating cylinders 28, and the center chucks
5, 6 are operated by the center chuck actuating cylinders 26 to release the cloth,
whereby the cloth is delivered from the center chucks 5, 6 to the spreading chucks
8. Then, an upper side portion of the cloth can be spread by moving the spreading
chucks 8 along the second rail 23 so as to space from each other in the right-to-left
direction in the state of the spreading chucks 8 receiving the opposite corner regions
of the cloth.
[0055] The air suction device is installed below the spreading device and comprises a vacuum
box 24 having a suction port formed at a top thereof, an air suction fan 16 for sucking
air in the vacuum box 24, and leading rollers 33 disposed on the front side near the
suction port of the vacuum box 24 (above a front wall). The air suction fan 16 is
operated when the upper side portion of the cloth is fixedly held by upper end fixing
bars 12 and a horizontally moving member 11, the upper end fixing bars 12 being positioned
at a height in an opposed relation to the horizontally moving device just below the
spreading device and having a gap between them, which allows passage of the cloth
through it. Substantially at the same timing, the leading rollers 33 are rotated in
a feed direction at a high speed by leading roller motors 13 such that a lower portion
of the cloth is sucked into the vacuum box 24 and the cloth is spread in the vertical
direction.
[0056] Further, the suction of the cloth into the vacuum box 24 is performed for a very
short time immediately after the upper side portion of the cloth has been stretched
by the spreading chucks. For that operation, a passage between the air suction fan
16 and the vacuum box 24 is selectively communicated with each other or cut off by
a vacuum switching damper 15.
[0057] The horizontally moving device comprises a horizontally moving member 11 moving above
a transfer conveyor 18 toward and away from the upper end fixing bars 12, a vacuum
motor 17 causing a suction force to act in a suction box formed on the horizontally
moving member 11, a horizontally moving member cylinder 32 for horizontally moving
the horizontally moving member 11, right and left upper end fixing bars 12 positioned
just below the spreading chucks 8 at the same height as the horizontally moving member
11 in an opposed relation and having a gap formed in a central area between the bars
12, which allows passage of the cloth grasped by the center chucks 5, 6 through it,
and right and left air blowers 14 disposed adjacent respectively to the right and
left upper end fixing bars 12 and having a gap formed in a central area between the
air blowers 14, which allows passage of the cloth grasped by the center chucks 5,
6 through it. The horizontally moving member 11 has a length in the right- to-left
direction corresponding to a maximum width of cloths to be treated, and the suction
box having a large number of small holes is formed on an upper surface of the horizontally
moving member 11 at a front end portion thereof. By sucking air in the horizontally
moving member 11 with the operation of the vacuum motor 17, the upper side portion
of the cloth can be attracted onto the upper surface of the horizontally moving member
11. When the horizontally moving member cylinder 32 is in its contracted state, the
horizontally moving member 11 is positioned substantially just below the spreading
chucks 8, and when the horizontally moving member cylinder 32 is spread, the horizontally
moving member 11 is moved toward the inner or rear side at a high speed.
[0058] The cloth is delivered from the spreading chucks 8 to the horizontally moving member
11 by contracting the horizontally moving member cylinder 32 to hold the cloth between
the upper end fixing bars 12 and the horizontally moving member 11, by releasing the
spreading chucks 8, and by blowing air to the upper side portion of the cloth from
the air blowers 14 such that the upper side portion of the cloth is transferred onto
the horizontally moving member 11.
[0059] The carrying device comprises the transfer conveyor 18 constituted by a perforated
belt having a large number of small holes formed therein, a peeling-off shaft 19 disposed
in front of the transfer conveyor and rotating at a speed lower than a horizontally
moving speed of the horizontally moving member 11 and a rotating speed of the transfer
conveyor 18, an air suction passage 25 provided below the transfer conveyor 18, and
a discharge conveyor 34 disposed in continuation with the transfer conveyor 18. A
trailing end portion of the discharge conveyor 34 is continued to an inserting conveyor
(not shown) on the press side.
[0060] The air suction passage 25 is communicated with the vacuum box 24, and the switching
damper 15 enables a suction force to selectively act in any of the vacuum box 24 and
the air suction passage 25. When the cloth is carried, a negative pressure is caused
to generate in the air suction passage 25 so that the cloth having been supplied onto
the transfer conveyor 18 is held under the suction and is surely transported by the
transfer conveyor 18.
[0061] When the cloth is delivered from the horizontally moving member 11 to the transfer
conveyor 18, the switching damper 15 is operated such that the suction force is changed
over to act in the air suction passage 25 instead of the vacuum box 24. When the horizontally
moving member 11 is moved rearward, the cloth first comes into contact with the peeling-off
shaft 19. However, because the moving speed of the horizontally moving member 11 is
higher than the rotating speed of the peeling-off shaft 19, there occurs a frictional
force acting on a contact surface between the peeling-off shaft 19 and the cloth "a".
Further, because the horizontally moving member 11 is moved rearward, the frictional
force between the peeling-off shaft 19 and the cloth becomes larger than the suction
force applied from the suction box formed on the horizontally moving member 11. Accordingly,
the upper side portion of the cloth is transferred from the horizontally moving member
11 onto an upper surface of the transfer conveyor 18 in a state where the upper side
portion of the cloth is spread in the front-to-back direction. At that time, the upper
side portion of the cloth comes into close contact with the upper surface of the transfer
conveyor 18 by the action of the suction force applied from the air suction passage
25.
[0062] The operation of the cloth spreading and carrying device according to the present
invention will be described below on the time series with reference to Figs. 3 through
11.
[0063] Fig. 3 shows the operation when the up-button disposed in the inserting device located
at a second position counting from the left in the front view is depressed by the
worker. The inserting chuck 1 is ascended by the ascending/descending slide cylinder
2 while the cloth "a" is gripped by the grips 1a - 1d. On that occasion, the transverse
chuck 3 is horizontally moved by the transverse chuck sliding motor 4 to a position
opposed to the inserting chuck 1 which is in the ascending step, and the transverse
chuck 3 is held in a standby state where the clips 3a - 3d are opened. At the time
when the inserting chuck 1 is ascended to the delivery position, the clips 3a, 3b
are positioned between the clips 1 a, 1 b and the clips 3c, 3d are positioned between
the clips 1c, 1 d, and the clips 1 a - 1d are released by coming into abutment against
the release plate 52 which is in the ascended position. Further, the cloth is grasped
by the clips 3a - 3d with the opening/closing bar 51 operated by the transverse chuck
opening/closing cylinder 29. After the delivery of the cloth "
a", the inserting chuck 1 is started to descend and the transverse chuck 3 is started
to horizontally move toward the central area of the device frame after the lapse of
a short time from the delivery.
[0064] Fig. 4 shows the operation when the cloth
"a" is delivered from transverse chuck 3 to the delivery device. When the transverse
chuck 3 grasping the cloth
"a" is moved to the central area of the device frame, the center chucks 5, 6 are swung
to the front side closer to the worker by the center chuck swinging cylinders 7. When
the grasping claws of the pairs of the center chucks 5, 6 are positioned respectively
between the clamps 3a, 3b and between the clamps 3c, 3d, the center chuck actuating
cylinders are operated to grasp the cloth and the grasping portions of the transverse
chuck 3 are released by the opening/closing bar 51 which is operated by the transverse
chuck opening/closing cylinder 29, whereby the cloth
"a" is delivered from the transverse chuck 3 to the center chucks 5, 6. After the delivery
of the cloth
"a", the center chucks 5, 6 are swung for return to the original positions by the center
chuck swinging cylinders 7.
[0065] The transverse chuck 3 having delivered the cloth is kept in a standby state in the
central area of the device frame until the next cloth is started to ascend.
[0066] Fig. 5 shows the operation of a pre-step in which the cloth
"a" is delivered from the delivery device to the spreading device. The outer center chucks
6 are moved outward to further space from each other by the center chuck spacing cylinders
such that each of the opposite corner regions of the cloth "a" is brought into a stretched
state over several centimeters. At that time, because the outer center chucks 6 generate
weaker grasping forces and have the smaller-sized grasping claws than the inner center
chucks 5, the outer center chucks 6 stretch the opposite corner regions of the cloth
while sliding on them. Then, the center chucks 5, 6 are further swung rearward by
the center chuck swinging cylinders 7 such that the stretched opposite corner regions
of the cloth
"a" are grasped by the spreading chucks 8 for delivery of the cloth to the spreading
chucks 8. After the delivery of the cloth
"a", the center chucks 5, 6 are swung for return to the original positions by the center
chuck swinging cylinders 7.
[0067] In parallel to the above operation, upon detecting the up-signal for the inserting
chuck 1 grasping the cloth
b, the transverse chuck 3 is moved to the position opposed to the relevant inserting
chuck 1.
[0068] Figs. 6 and 7 show the operation when the cloth
"a" is spread by the spreading device in the right-to-left direction. The spreading chucks
8 having received the cloth
"a" are moved to the right and the left more apart from each other by the spreading chuck
sliding motors 9 in a synchronous relation, thus spreading the cloth
"a" in the right-to-left direction. Also, the horizontally moving member 11 is started
to move forward by the horizontally moving member cylinder 32.
[0069] In parallel to the above operation, the transverse chuck 3 receives the next cloth
b from the inserting chuck 1 and is horizontally moved to the central area of the device
frame.
[0070] Figs. 8 and 9 show the operation when the cloth "
a" is spread in the vertical direction and is delivered from the spreading device to
the horizontally moving member 11. After the cloth
"a" has been completely spread in the right-to-left direction, the cloth
"a" is held between the front end portion of the horizontally moving member 11 and the
upper end fixing bars 12. Simultaneously, the leading rollers 33 are rotated at a
high speed and the switching damper 15 is changed over so as to act the suction force
through the vacuum box 24. Therefore, the cloth
"a" hanging from the spreading chucks 8 is sucked into the vacuum box 24 and is spread
by the actions of a downward flow of air and the dead weight of the cloth. Then, the
switching damper 15 is changed over again to stop the suction force applied through
the vacuum box 24, whereby air is now blown toward the upper side portion of the cloth
"a" from the air blowers 14. In addition, the spreading chucks 8 are released, thus causing
the upper side portion of the cloth
"a" to be transferred onto the suction box on the horizontally moving member 11 with
the suction force acting in the suction box by the operation of the vacuum motor 17.
[0071] In parallel to the above operation, the next cloth
b is delivered from the transverse chuck 3 to the delivery device. The center chucks
5, 6 having received the cloth
b are swung for return to the original positions by the center chuck swinging cylinders
7 and are kept in a standby state until the spreading chucks 8 are released.
[0072] Figs. 10 and 11 show the operation when the cloth
"a" is delivered from the horizontally moving member 11 to the carrying device. When
the horizontally moving member 11 is further moved rearward by the horizontally moving
member cylinder 32, the cloth "
a" first comes into contact with the peeling-off shaft 19. Because the rotating speed
of the peeling-off shaft 19 is sufficiently slower than that of the horizontally moving
member 11, there occurs a frictional force acting between them. In addition, because
the horizontally moving member 11 is moved rearward, the frictional force is further
increased so that the upper side portion of the cloth
"a" is moved away from the suction box. At that time, the switching damper 15 is already
in the changed-over state and the suction force applied from the air suction fan 16
acts in the air suction passage 25. Accordingly, the cloth "
a"' is transferred onto the upper surface of the transfer conveyor 18 due to both the
sucking action through the air suction passage 25 and a natural drop of the cloth
"a" caused by the dead weight thereof. Then, with the rotation of the transfer conveyor
18, the cloth
"a" is carried onto the discharge conveyor 34 and is continuously carried onto the inserting
conveyor (not shown) on the subsequent press side.
[0073] In parallel to the above operation, the cloth b is delivered from the center chucks
5, 6 to the spreading device and is subjected to the spreading step by the spreading
device.
1. A method for spreading and carrying cloth (a, b), the method comprising the steps
of:
carrying the cloth (a, b) upward by an inserting device while grasping the cloth (a,
b) at both corner regions on one side thereof;
receiving the cloth (a, b) from the inserting device by a transverse chuck (3) and
carrying the cloth (a, b) to a center position along a first rail (21) disposed to
lie in the right-to-left direction;
receiving the cloth (a, b) from the transverse chuck (3) by a delivery device and
delivering the cloth (a, b) to a spreading device;
laterally spreading the cloth (a, b) received from the delivery device by the spreading
device, which is formed of a pair of chucks (8) movable along a second rail (23) disposed
to lie in the right-to-left direction, by separating the pair of chucks (8) away from
each other;
spreading the laterally spread cloth (a, b) in the vertical direction by an air suction
device;
receiving the cloth (a, b) from the spreading device by the horizontally moving device
and delivering the cloth (a, b) to a carrying device; and
carrying the cloth (a, b) to a next process by the carrying device.
2. A method for spreading and carrying cloth (a, b) according to Claim 1, wherein the
horizontally moving device fixedly holds a hanging portion of the cloth (a, b) by
cooperation with an upper end fixing bar (12) held in a forwardly moved position and
receives the cloth (a, b) from the spreading device while blowing air to an upper
side portion of the cloth (a, b).
3. A method for spreading and carrying cloth (a, b) according to Claim 2, wherein the
air suction device spreads the cloth (a, b) in the vertical direction when the horizontally
moving device fixedly holds the hanging portion of the cloth (a, b).
4. A method for spreading and carrying cloth (a, b) according to any one of Claims 1
to 3, wherein the delivery device has a pair of grasping portions (3a-3d) each comprising
an outer chuck (3a, 3d) and an inner chuck (3b, 3c), the grasping portions (3a-3d)
receiving the cloth (a, b) from the transverse chuck (3), and the delivery device
delivers the cloth (a, b) to the spreading device after swinging each outer chuck
(3a, 3d) outward to stretch each of both the corner regions of the cloth (a, b) over
a certain width.
5. A method for spreading and carrying cloth (a, b) according to any one of Claims 1
to 4, wherein the carrying device has a rotating speed at a position in which the
cloth (a, b) first comes into the carrying device to be slower than a rotating speed
at a position in which the cloth (a, b) is carried.
6. A method for spreading and carrying cloth (a, b) according to any one of Claims 1
to 5, wherein after delivering the cloth (a, b) to the delivery device, the transverse
chuck (3) is immediately moved to a position opposed to another inserting device.
7. A device for spreading and carrying cloth (a, b), the device comprising:
an inserting device for carrying the cloth (a, b) upward while grasping the cloth
(a, b) at both corner regions on one side thereof;
a transverse chuck (3) for moving the cloth (a, b) received from the inserting device
to a center position along a first rail (21) disposed to lie in the right-to-left
direction;
a delivery device for receiving the cloth (a, b) from the transverse chuck (3) and
for delivering the cloth to a spreading device;
the spreading device formed of a pair of chucks (8) movable along a second rail (23)
disposed to lie in the right-to-left direction, for receiving the cloth (a, b) from
the delivery device, and for separating the pair of chucks (8) away from each other
to laterally extend the cloth (a, b);
an air suction device for spreading the laterally spread cloth (a, b) in the vertical
direction;
a horizontally moving device for receiving the cloth (a, b) from the spreading device
and for delivering the cloth (a, b) to a carrying device; and
the carrying device for receiving the cloth (a, b) from the horizontally moving device
and for carrying the cloth (a, b) to a next process.
8. A device for spreading and carrying cloth (a, b) according to Claim 7, wherein the
delivery device has a pair of grasping portions (3a-3d) each comprising an outer chuck
(3a, 3d) and an inner chuck (3b, 3c), the grasping portions (3a-3d) serving to grasp
the cloth (a, b), and the delivery device is configured to swing each outer chuck
(3a, 3d) outward to stretch each of both the corner regions of the cloth (a, b) over
a certain width.
9. A device for spreading and carrying cloth (a, b) according to Claim 7 or 8, wherein
the horizontally moving device comprises a horizontally moving member (11) configured
to move toward and away from right and left upper end fixing bars (12) which are disposed
below the spreading device, a vacuum motor (17) for causing a suction force to act
in a suction box formed on the horizontally moving member (11), a horizontally moving
member cylinder (32) for horizontally moving the horizontally moving member (11),
right and left air blowers (14) having a gap formed in a central area between the
air blowers (14), which allows passage of the cloth (a, b) therethrough, and
air is blown to an upper side portion of the cloth (a, b) from the air blowers (14)
in a state that the cloth (a, b) is held between the upper end fixing bars (12) and
the horizontally moving member (11).
10. A device for spreading and carrying cloth (a, b) according to any one of Claims 7
to 9, wherein the air suction device comprises a vacuum box (24) disposed below the
spreading device and having a suction port formed at a top thereof, an air suction
fan (16) for sucking air in the vacuum box (24), and leading rollers (33) disposed
on the front side near the suction port of the vacuum box (24), and
the air suction device is configured to spread the cloth (a, b) in the vertical direction
while the upper side portion of the cloth (a, b) is held between the right and left
upper end fixing bars (12) disposed below the spreading device and the horizontally
moving member (11).
11. A device for spreading and carrying cloth (a, b) according to any one of Claims 7
to 10, wherein the carrying device comprises a transfer conveyor (18) being rotatable
to carry the cloth (a, b) to the next process, and a peeling-off shaft (19) disposed
in front of the transfer conveyor (18), and
a rotating speed of the carrying device is set to be lower than a horizontally moving
speed of the horizontally moving member (11) and a rotating speed of the transfer
conveyor (18).
1. Verfahren zum Ausbreiten und Tragen von Tuch (a, b), wobei das Verfahren die folgenden
Schritte aufweist:
Tragen des Tuchs (a, b) nach oben durch eine Einsetzvorrichtung, während sie das Tuch
(a, b) an beiden Eckbereichen auf einer seiner Seiten greift;
Aufnehmen des Tuchs (a, b) von der Einsetzvorrichtung durch eine Querspanneinrichtung
(3) und Tragen des Tuchs (a, b) zu einer Mittelposition entlang einer ersten Schiene
(21), die angeordnet ist, um in der Rechts-Linksrichtung zu liegen;
Aufnehmen des Tuchs (a, b) von der Querspanneinrichtung (3) durch eine Liefervorrichtung
und Liefern des Tuchs (a, b) an eine Ausbreitungsvorrichtung;
Querausbreiten des Tuchs (a, b), das von der Liefervorrichtung durch die Ausbreitungsvorrichtung
aufgenommen wird, die aus einem Paar von Spannelementen (8) ausgebildet ist, das entlang
einer zweiten Schiene (23) bewegbar ist, die in der Rechts-/Linksrichtung liegt, indem
das Paar von Spanneinrichtungen (8) voneinander weg getrennt wird;
Ausbreiten des querausgebreiteten Stoffs (a, b) in der vertikalen Richtung durch eine
Luftsaugvorrichtung;
Aufnehmen des Tuchs (a, b) von der Ausbreitungsvorrichtung, indem die Vorrichtung
horizontal bewegt wird, und Liefern des Tuchs (a, b) an eine Tragevorrichtung; und
Tragen des Tuchs (a, b) zu einem nächsten Vorgang durch die Tragevorrichtung.
2. Verfahren zum Ausbreiten und Tragen von Tuch (a, b) nach Anspruch 1, wobei die sich
horizontal bewegende Vorrichtung einen hängenden Abschnitt des Tuchs (a, b) festhält,
durch Zusammenwirken mit einer Befestigungsstange (12) an einem oberen Ende, die in
einer vorwärtsbewegten Position gehalten ist, und das Tuch (a, b) von der Ausbreitungsvorrichtung
aufnimmt, während sie Luft zu einem oberen Seitenabschnitt des Tuchs (a, b) bläst.
3. Verfahren zum Ausbreiten und Tragen von Tuch (a, b) nach Anspruch 2, wobei die Luftsaugvorrichtung
das Tuch (a, b) in der vertikalen Richtung ausbreitet, wenn die sich horizontal bewegende
Vorrichtung den hängenden Abschnitt des Tuchs (a, b) festhält.
4. Verfahren zum Ausbreiten und Tragen von Tuch (a, b) nach einem der Ansprüche 1 bis
3, wobei die Liefervorrichtung ein Paar von Greifabschnitten (3a-3d) hat, wobei jede
eine äußere Spanneinrichtung (3a, 3d) und eine innere Spanneinrichtung (3b, 3c) aufweist,
wobei die Greifabschnitte (3a-3d) das Tuch (a, b) von der Querspanneinrichtung (3)
aufnehmen, und wobei die Liefervorrichtung das Tuch (a, b) an die Ausbreitungsvorrichtung
liefert, nachdem sie jede äußere Spanneinrichtung (3a, 3d) nach außen schwingt, um
jeden der beiden Eckbereiche des Tuchs (a, b) über eine bestimmte Breite zu dehnen.
5. Verfahren zum Ausbreiten und Tragen von Tuch (a, b) nach einem der Ansprüche 1 bis
4, wobei die Tragevorrichtung eine Drehgeschwindigkeit an einer Position hat, an der
das Tuch (a, b) zuerst in die Tragevorrichtung kommt, die niedriger ist als eine Drehgeschwindigkeit
an einer Position, an der das Tuch (a, b) getragen wird.
6. Verfahren zum Ausbreiten und Tragen von Tuch (a, b) nach einem der Ansprüche 1 bis
5, wobei nach einem Liefern des Tuchs (a, b) an die Liefervorrichtung, die Querspanneinrichtung
(3) unverzüglich zu einer Position bewegt wird, die einer anderen Einsetzvorrichtung
gegenüberliegt.
7. Vorrichtung zum Ausbreiten und Tragen von Tuch (a, b), wobei die Vorrichtung aufweist:
eine Einsetzvorrichtung, zum Tragen des Tuchs (a, b) nach oben, während sie das Tuch
(a, b) an beiden Eckbereichen auf einer seiner Seiten greift;
eine Querspanneinrichtung (3), zum Bewegen des Tuchs (a, b), das von der Einsetzvorrichtung
aufgenommen wird, zu einer Mittelposition entlang einer ersten Schiene (21), die angeordnet
ist, um in der Rechts-/Linksrichtung zu liegen;
eine Liefervorrichtung, zum Aufnehmen des Tuchs (a, b) von der Querspanneinrichtung
(3), und zum Liefern des Tuchs an eine Ausbreitungsvorrichtung;
die Ausbreitungsvorrichtung, die aus einem Paar von Spanneinrichtungen (8) ausgebildet
ist, das entlang einer zweiten Schiene (23) bewegbar ist, die in der Rechts-/Linksrichtung
angeordnet ist, zum Aufnehmen des Tuchs (a, b) von der Liefervorrichtung, und zum
Trennen des Paars von Spanneinrichtungen (8) weg voneinander, um das Tuch (a, b) quer
auszudehnen;
eine Luftsaugvorrichtung, zum Ausbreiten des quer ausgebreiteten Tuchs (a, b) in der
vertikalen Richtung;
eine sich horizontal bewegende Vorrichtung, zum Aufnehmen des Tuchs (a, b) von der
Ausbreitungsvorrichtung, und zum Liefern des Tuchs (a, b) an eine Tragevorrichtung;
und
die Tragevorrichtung, zum Aufnehmen des Tuchs (a, b) von der sich horizontal bewegenden
Vorrichtung, und zum Tragen des Tuchs (a, b) zu einem nächsten Vorgang.
8. Vorrichtung zum Ausbreiten und Tragen von Tuch (a, b) nach Anspruch 7, wobei die Liefervorrichtung
ein Paar von Greifabschnitten (3a-3d) hat, wobei jede eine äußere Spanneinrichtung
(3a, 3d) und eine innere Spanneinrichtung (3b, 3c) aufweist, wobei die Greifabschnitte
(3a-3d) dazu dienen, das Tuch (a, b) zu greifen, und die Liefervorrichtung eingerichtet
ist, jede äußere Spanneinrichtung (3a, 3d) nach außen zu schwingen, um jeden der beiden
Eckbereiche des Tuchs (a, b) über eine bestimmte Breite zu dehnen.
9. Vorrichtung zum Ausbreiten und Tragen von Tuch (a, b) nach Anspruch 7 oder 8, wobei
die sich horizontal bewegende Vorrichtung ein sich horizontal bewegendes Element (11)
aufweist, das eingerichtet ist, sich in Richtung und weg von einer rechten und linken
Befestigungsstange (12) an einem oberen Ende zu bewegen, die unter der Ausbreitungsvorrichtung
angeordnet sind, einen Vakuummotor (17), zum Bewirken einer Saugkraft, die in einem
Saugkasten wirkt, der an dem sich horizontal bewegenden Element (11) ausgebildet ist,
einen Zylinder (32) des sich horizontal bewegenden Elements, zum horizontalen Bewegen
des sich horizontal bewegenden Elements (11), rechte und linke Luftgebläse (14), mit
einem in einem Mittelbereich zwischen den Luftgebläsen (14) ausgebildeten Spalt, der
ein Passieren des Tuchs (a, b) durch diese ermöglicht, und
wobei Luft auf einen oberen Seitenabschnitt des Tuchs (a, b) aus den Luftgebläsen
(14) in einem Zustand geblasen wird, in dem das Tuch (a, b) zwischen den Befestigungsstangen
(12) an einem oberen Ende und dem sich horizontal bewegenden Element (11) gehalten
ist.
10. Vorrichtung zum Ausbreiten und Tragen von Tuch (a, b) nach einem der Ansprüche 7 bis
9, wobei die Luftsaugvorrichtung einen Vakuumkasten (24), der unter der Ausbreitungsvorrichtung
angeordnet ist und an dessen Oberteil eine Saugöffnung ausgebildet ist, einen Luftsaugventilator
(16), zum Saugen von Luft in den Vakuumkasten (24), sowie Führungsrollen (33) aufweist,
die an der vorderen Seite in der Nähe der Saugöffnung des Vakuumkastens (24) angeordnet
sind, und
wobei die Luftsaugvorrichtung eingerichtet ist, das Tuch (a, b) in der vertikalen
Richtung auszubreiten, während der obere Seitenabschnitt des Tuchs (a, b) zwischen
der rechten und linken Befestigungsstange (12) an einem oberen Ende gehalten ist,
die unterhalb der Ausbreitungsvorrichtung und des sich horizontal bewegenden Elements
(11) angeordnet sind.
11. Vorrichtung zum Ausbreiten und Tragen von Tuch (a, b) gemäß einem der Ansprüche 7
bis 10, wobei die Tragevorrichtung einen Transportförderer (18), der drehbar ist,
um das Tuch (a, b) zu dem nächsten Vorgang zu tragen, sowie eine Ablösewelle (19)
aufweist, die vor dem Transportförderer (18) angeordnet ist, und
eine Drehzahl der Tragevorrichtung festgelegt ist, um niedriger zu sein als eine horizontale
Bewegungsgeschwindigkeit des sich horizontal bewegenden Elements (11) und eine Drehzahl
des Transportförderers (18).
1. Procédé pour étendre et transporter de la toile (a, b), le procédé comprenant les
étapes suivantes :
transporter la toile (a, b) vers le haut par un dispositif d'insertion tout en saisissant
la toile (a, b) au niveau des deux régions de coin sur son côté ;
recevoir la toile (a, b) du dispositif d'insertion par un mandrin transversal (3)
et transporter la toile (a, b) jusqu'à une position centrale le long d'un premier
rail (21) disposé pour être dans la direction droite - gauche ;
recevoir la toile (a, b) du mandrin transversal (3) par un dispositif de distribution
et distribuer la toile (a, b) au dispositif d'extension ;
étendre latéralement la toile (a, b) reçue du dispositif de distribution par le dispositif
d'extension, qui est formé avec une paire de mandrins (8) mobiles le long d'un second
rail (23) disposé pour être dans la direction droite - gauche, en séparant la paire
de mandrins (8) l'un de l'autre ;
étendre la toile (a, b) latéralement étendue dans la direction verticale par un dispositif
d'aspiration d'air ;
recevoir la toile (a, b) du dispositif d'extension par le dispositif horizontalement
mobile et distribuer la toile (a, b) jusqu'à un dispositif de transport ; et
transporter la toile (a, b) jusqu'à un processus suivant par le dispositif de transport.
2. Procédé pour étendre et transporter de la toile (a, b) selon la revendication 1, dans
lequel le dispositif horizontalement mobile maintient de manière fixe une partie de
suspension de la toile (a, b) en coopérant avec une barre de fixation d'extrémité
supérieure (12) maintenue dans une position déplacée vers l'avant et reçoit la toile
(a, b) du dispositif d'extension tout en soufflant de l'air jusqu'à une partie latérale
supérieure de la toile (a, b).
3. Procédé pour étendre et transporter de la toile (a, b) selon la revendication 2, dans
lequel le dispositif d'aspiration d'air étend la toile (a, b) dans la direction verticale
lorsque le dispositif horizontalement mobile maintient la partie de suspension de
la toile (a, b).
4. Procédé pour étendre et transporter de la toile (a, b) selon l'une quelconque des
revendications 1 à 3, dans lequel le dispositif de distribution a une paire de parties
de préhension (3a-3d) comprenant chacune un mandrin externe (3a, 3d) et un mandrin
interne (3b, 3c), les parties de préhension (3a-3d) recevant la toile (a, b) du mandrin
transversal (3) et le dispositif de distribution distribue la toile (a, b) au dispositif
d'extension après avoir fait osciller chaque mandrin externe (3a, 3d) vers l'extérieur
pour étirer chacune des deux régions de coin de la toile (a, b) sur une certaine largeur.
5. Procédé pour étendre et transporter de la toile (a, b) selon l'une quelconque des
revendications 1 à 4, dans lequel le dispositif de transport a une vitesse de rotation
dans une position dans laquelle la toile (a, b) pénètre dans un premier temps dans
le dispositif de transport destinée à être plus lente qu'une vitesse de rotation dans
une position dans laquelle la toile (a, b) est transportée.
6. Procédé pour étendre et transporter de la toile (a, b) selon l'une quelconque des
revendications 1 à 5, dans lequel après la distribution de la toile (a, b) au dispositif
de distribution, le mandrin transversal (3) est immédiatement déplacé dans une position
opposée à un autre dispositif d'insertion.
7. Dispositif pour étendre et transporter de la toile (a, b), le dispositif comprenant
:
un dispositif d'insertion pour transporter la toile (a, b) vers le haut tout en saisissant
la toile (a, b) au niveau des deux régions de coin sur son côté ;
un mandrin transversal (3) pour déplacer la toile (a, b) reçue du dispositif d'insertion
vers une position centrale le long d'un premier rail (21) disposé pour être dans la
direction droite - gauche ;
un dispositif de distribution pour recevoir la toile (a, b) du mandrin transversal
(3) et pour distribuer la toile à un dispositif d'extension ;
le dispositif d'extension formé avec une paire de mandrins (8) mobiles le long d'un
second rail (23) disposé pour être dans la direction droite - gauche, afin de recevoir
la toile (a, b) du dispositif de distribution et pour séparer la paire de mandrins
(8) l'un de l'autre pour étendre latéralement la toile (a, b) ;
un dispositif d'aspiration d'air pour étendre la toile (a, b) étendue latéralement
dans la direction verticale ;
un dispositif horizontalement mobile pour recevoir la toile (a, b) du dispositif d'extension
et pour distribuer la toile (a, b) à un dispositif de transport ; et
le dispositif de transport pour recevoir le tissu (a, b) du dispositif horizontalement
mobile et pour transporter la toile (a, b) vers le processus suivant.
8. Dispositif pour étendre et transporter de la toile (a, b) selon la revendication 7,
dans lequel le dispositif de distribution a une paire de parties de préhension (3a-3d)
comprenant chacune un mandrin externe (3a, 3d) et un mandrin interne (3b, 3c), les
parties de préhension (3a-3d) servant à saisir la toile (a, b) et le dispositif de
distribution est configuré pour faire osciller chaque mandrin externe (3a, 3d) vers
l'extérieur pour étirer chacune des deux régions de coin de la toile (a, b) sur une
certaine largeur.
9. Dispositif pour étendre et transporter de la toile (a, b) selon la revendication 7
ou 8, dans lequel le dispositif horizontalement mobile comprend un élément horizontalement
mobile (11) configuré pour se déplacer vers et à distance des barres de fixation d'extrémité
supérieures droite et gauche (12) qui sont disposées au-dessous du dispositif d'extension,
un moteur d'aspiration (17) pour amener une force d'aspiration à agir dans une caisse
aspirante formée sur l'élément horizontalement mobile (11), un cylindre d'élément
horizontalement mobile (32) pour déplacer horizontalement l'élément horizontalement
mobile (11), des soufflantes d'air droite et gauche (14) ayant un espace formé dans
une zone centrale entre les soufflantes d'air (14) qui permet le passage de la toile
(a, b) à travers ces dernières, et
l'air est soufflé vers une partie latérale supérieure de la toile (a, b) à partir
des soufflantes d'air (14) dans un état dans lequel la toile (a, b) est maintenue
entre les barres de fixation d'extrémité supérieures (12) et l'élément horizontalement
mobile (11).
10. Dispositif pour étendre et transporter de la toile (a, b) selon l'une quelconque des
revendications 7 à 9, dans lequel le dispositif d'aspiration d'air comprend une caisse
aspirante (24) disposée au-dessous du dispositif d'extension et ayant un orifice d'aspiration
formé au niveau de sa partie supérieure, un ventilateur d'aspiration d'air (16) pour
aspirer l'air dans la caisse aspirante (24) et des rouleaux d'attaque (33) disposés
sur le côté avant à proximité de l'orifice de vide de la caisse aspirante (24), et
le dispositif d'aspiration d'air est configuré pour étendre la toile (a, b) dans la
direction verticale alors que la partie latérale supérieure de la toile (a, b) est
maintenue entre les barres de fixation d'extrémité supérieures droite et gauche (12)
disposées au-dessous du dispositif d'extension et du dispositif horizontalement mobile
(11).
11. Dispositif pour étendre et transporter de la toile (a, b) selon l'une quelconque des
revendications 7 à 10, dans lequel le dispositif de transport comprend un transporteur
de transfert (18) qui peut tourner pour transporter le tissu (a, b) jusqu'au processus
suivant, et un arbre de détachement (19) disposé en face du transporteur de transfert
(18), et
une vitesse de rotation du dispositif de transport est déterminée pour être inférieure
à une vitesse horizontalement mobile de l'élément horizontalement mobile (11) et une
vitesse de rotation du transporteur de transfert (18).