U.S. patent application number 12/264919 was filed with the patent office on 2011-11-03 for automatic fast rewinder for shaftless packing film.
Invention is credited to Chun-Shan CHEN.
Application Number | 20110266386 12/264919 |
Document ID | / |
Family ID | 44857506 |
Filed Date | 2011-11-03 |
United States Patent
Application |
20110266386 |
Kind Code |
A1 |
CHEN; Chun-Shan |
November 3, 2011 |
AUTOMATIC FAST REWINDER FOR SHAFTLESS PACKING FILM
Abstract
An automatic fast rewinder for shaftless packing film includes a
body, a feeding box for containing inflated shafts, a guide passage
formed in the feeding box, a pair of rotary discs, four pairs of
pinching heads, a support frame for holding a large roll of packing
film, plural guide wheels and a pressing wheel for pressing and
move packing film of the large roll, a saw-teeth cutting unit, and
a collect unit and plural inflatable shafts. In operation, the four
pairs of pinching pins rotating with the rotary discs are moved
orderly to pinch or release the inflatable shaft to rewound with
packing film of the large roll, cut by the cutting unit, then
dropped down on the collect unit. So the finished small rolls with
the inflated shafts have inflated shaft deflated and pulled out so
the finished small roll becomes a small roll without a winding
shaft.
Inventors: |
CHEN; Chun-Shan; (Tainan
Hsien, TW) |
Family ID: |
44857506 |
Appl. No.: |
12/264919 |
Filed: |
November 5, 2008 |
Current U.S.
Class: |
242/562 |
Current CPC
Class: |
B65H 75/243 20130101;
B65H 2301/41814 20130101; B65H 18/145 20130101; B65H 2301/41354
20130101; B65H 2801/81 20130101; B65H 2301/4165 20130101; B65H
2408/23157 20130101; B65H 2408/2313 20130101; B65H 18/028 20130101;
B65H 2301/418526 20130101 |
Class at
Publication: |
242/562 |
International
Class: |
B65H 16/00 20060101
B65H016/00; B65H 19/26 20060101 B65H019/26; B65H 18/04 20060101
B65H018/04 |
Claims
1. (canceled)
2. An automatic fast rewinder for shaftless packing film
comprising: a body (2), a support frame (20), plural guide wheels
(21), a pressing wheel (22), a feeding box (3), a pair of rotary
discs (4), a saw-teeth cutting unit (5), a collect unit (7) and
plural inflatable shafts 7; wherein the support frame (20) is
positioned on the body (1) for holding a large roll of packing
film; the plural guide wheels (21) and the pressing wheel (22) are
arranged orderly on the body (2) and rotated to move the packing
film from the large roll held on the support frame 20; the feeding
box (3) is placed on the body (2) for containing a number of the
inflatable shafts (7) in inflated condition, provided with a guide
passage (30) extending down from one side of a bottom thereof for
the inflated shafts (7) to orderly fall down, and a stopper (31)
fixed at a lower end of the guide passage (30) for stopping a
lowest inflated shaft (7); the pair of rotary discs (4) is
installed to face each other and separated by a distance longer
than a length of the inflatable shaft 7 under the guide passage 30
and four pairs of pinching heads 40 movably fitted through the pair
of rotary discs 4 equidistantly spaced apart around the rotary
discs 4 for being moved inward and outward to pinch and release the
inflated shaft 7 remained at the stopper by means of a moving unit
and rotating together with the rotary discs 4 at the same time; the
saw-teeth cutting unit 5 is located at one side of the rotary discs
4 for cutting off packing film of a large roll after rewound on the
inflated shaft 7 and the inflated shaft 7 with the wound packing
film becomes a small roll of packing film with the inflated shaft
7; the collect unit 6 is located to extend from under the rotary
discs 4 to an outside of the body 2 for collecting the small
packing film rolls after released from the pair of pinching heads
40; each inflatable shaft 7 is provided with a rubber cover 70
round its outer surface and to be inflated for use and deflated
after the small roll of packing film is finished; wherein in using,
a number of the inflatable shafts 7 are in advance inflated, and
then placed in the feeding box 3; the inflated shafts 7 therein
then naturally fall orderly in the guide passage 30 to let the
lowest one reach the stopper 31 and stopped there; then the lowest
inflated shaft 7 is aligned to a first pair of the pinching heads
40, which are then moved inward to pinch two ends of that first
inflated shaft 7 at a first position just under the stopper tightly
between the pair of the rotary discs 4, and the rotary discs 4 are
subsequently to be rotated through 90 degrees, to carry the first
pair of the pinching heads 40 together with the first inflated
shaft 7 to contact with one side of the last guide wheel 21, with a
second pair of the pinching heads 40 rotated at the same time to
the first position just under the lower end of the guide passage 30
and moved inward to pinch another inflated shaft 7, next, the
inflated shaft 7 at a second position, or at the side of the last
guide wheel 21 is to be wound with the packing film of the large
roll moved by the guide wheels 21; then the rotary discs 4 are
rotated again through 90 degrees to move the small picking film
roll just finished rewinding to a third position that is opposite
to the first position, with the packing film of the large roll
pulled and with the saw-teeth cutting unit swinging upward to cut
the packing film off the large roll, then the finished small
packing film roll of the first inflated shaft 7 is released from
the pair of the pinching heads 40 that is moved outward by the
moving unit, and drops down on the collect unit 6; and then the
inflated shaft 7 is deflated to enable it pulled off, finishing
making four small packing film rolls with no winding shaft by one
round of full rotation of the rotary discs 4, speeding up operation
of rewinding the large roll into plural small rolls of the packing
film (a) without a shaft; in this way, finished small packing film
rolls need no winding shafts; saving a lot cost of and being very
effective for protecting the environment by reusing the inflatable
shafts.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] This invention relates to an automatic fast rewinder for
shaftless packing film, particularly to one rewinding a large
packing film roll into plural small packing film rolls without a
winding shaft, shortening time needed for rewinding, stepping up
production and saving cost with environmental friendly effects.
[0003] 2. Description of the Prior Art
[0004] Packing films are generally made by rewinding a large
packing film roll into plural small packing film rolls by means of
a rewinder to facilitate using packing film. A conventional
rewinder for this purpose shown in FIGS. 1 and 2 includes a body
10, a support frame 11 fixed on the body 1 for holding a large
packing film roll (a) thereon, plural guide wheels 12 and a
pressing wheel 13 installed on the body 1 for moving the packing
film of the large roll. Then the packing film (a) of the large roll
is pulled by rotation of the guide wheel pressed down by the
pressing wheel 13 located at the last guide wheel 12. The rewinder
is further provided with a feeding unit 14 and a pinching unit 15
installed on the body 1 and a hot line cutting unit 16 installed on
the body 1, and a receptive box 17 placed at one side of the body 1
for storing plural tubular winding shafts (b) made of paper or
plastic.
[0005] In using, the tubular winding shaft (b) is pushed one by one
by the feeding unit 14 to the pinching unit 15, which then pinches
the winding shaft (b) tightly, with the packing film (a) pulled by
the guide wheels 12 to the winding shaft (b). Then the winding
shaft (b) is rotated, winding the packing film (a) continually
until the winding shaft (a) with the wound packing film has a
needed diameter, and then the pinching unit 15 carries the winding
shaft (b) upward and leftward to the hot line cutting unit 16,
which then cuts off the packing film (a) off the large roll,
finishing rewinding the large packing film roll into one small film
roll with one round of operation.
[0006] The conventional rewinder can rewind the packing film (a)
into only one small film roll by one round of operation, so its
production is slow, not effective. Moreover, the winding shaft (b)
has to be discarded after the mall packing film roll is used up,
making a waste to polluting the environment, with the cost for the
winding shafts lost.
SUMMARY OF THE INVENTION
[0007] The purpose of the invention is to offer an automatic fast
rewinder for shaftless packing film, which can rewind a large roll
of packing film into four small rolls with one rotation of a rotary
wheel, shortening time needed for rewinding, boosting production
and efficiently protecting the environment with no waste of winding
shafts by using reusable inflatable shaft for rewinding work.
[0008] The features of the invention are a body, a feeding box, a
pair of rotary discs positioned to be separated from each other
with a certain gap and four pairs of pinching heads connected with
a moving device and passing through the pair of rotary discs in a
equidistantly spaced apart condition, plural guide wheels, a
pressing wheel, a saw-teeth cutting unit, and a collect unit. Then
plural inflatable shafts inflated are placed in the feeding box and
then are orderly moved down through the guide passage of the
feeding box to a first position that the first inflated shaft is to
be pinched one by one on by a first pair of pinching heads of the
rotary discs, which are then rotated one time for 90 degrees to let
the first inflated shaft on the first pair of pinching heads moved
to a second position where the first inflated shaft is located
nearby the last guide wheel so that packing film of the large roll
is wound on the first inflated shaft on the first pair of pinching
heads to a needed length. Then the pair of rotary discs is rotated
again for 90 degrees to let the first pairs of pinching heads move
to a third position where the first inflated shaft with the wound
packing film is moved to a third position where the first inflated
shaft is located near the saw-teeth cutting unit, so the first
inflated shaft wound with the wound packing film is cut off the
large roll, and then released by the first pair of pinching heads
that are pulled outward by the moving device and then dropped with
its own weight to the collect unit where the first inflated shaft
wound with the packing film is picked up and then the inflated
shaft is deflated to shrink and pulled off to make a finished small
packing film roll with no shaft. Meanwhile, a second pair of
pinching heads is moved to the first position by one quarter
rotation of the pair of rotary disc to pinch a second inflated
shaft by the moving device, and in the way that the first inflated
shaft is wound with the packing film, moved, cut off and dropped on
the collect unit, the second inflated shaft is wound with packing
film and moved, cut and dropped on the collect unit in order.
Therefore one round of whole rotation of the pair of rotary discs
can produce four small packing film rolls with no winding
shaft.
BRIEF DESCRIPTION OF DRAWINGS
[0009] This invention will be better understood by referring to the
drawings, wherein:
[0010] FIG. 1 is a side view of a conventional rewinder for packing
film;
[0011] FIG. 2 is a side view of the conventional rewinder for
packing film, showing packing film being cut;
[0012] FIG. 3 is a perspective view of a small packing film roll of
the conventional rewinder for packing film;
[0013] FIG. 4 is a perspective view of an inflatable shaft in the
present invention;
[0014] FIG. 5 is a side view of an automatic fast rewinder for
shaftless packing film in the present invention;
[0015] FIG. 6 is a side view of the automatic fast rewinder for
shaftless packing film in the present invention, showing a packing
film being cut; and
[0016] FIG. 7 is a perspective view of an inflatable shaft in the
present invention, showing it deflated and taken out of a small
packing film roll rewound from a large packing film roll.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0017] A preferred embodiment of an automatic fast rewinder for
shaftless packing film in the present invention, as shown in FIGS.
4, 5 and 6, includes a body 2, a support frame 20, plural guide
wheels 21, a pressing wheel 22, a feeding box 3, a pair of rotary
discs 4, a saw-teeth cutting unit 5, a collect unit 7 and plural
inflatable shafts 7.
[0018] The support frame 20 is positioned on the body 1 for holding
a large roll of packing film (a).
[0019] The plural guide wheels 21 and the pressing wheel 22 are
arranged orderly on the body 2 and rotated to move the packing film
(a) from the large roll held on the support frame 20.
[0020] The feeding box 3 is placed on the body 2 for containing a
number of the inflatable shafts 7 in the inflated condition,
provided with a guide passage 30 extending down from one side of
the bottom for the inflated shafts 7 to orderly falling down, and a
stopper 31 fixed at a lower end of the guide passage 30 for
stopping a lowest inflated shaft 7.
[0021] The pair of rotary discs 4 is installed to face each other
and separated by a distance longer than the length of the
inflatable shaft 7 under the guide passage 30 and four pairs of
pinching heads 40 movably fitted through the pair of rotary discs 4
equidistantly spaced apart around the rotary discs 4 for being
moved inward and outward to pinch and release the inflated shaft 7
remained at the stopper by means of a moving unit and rotating
together with the rotary discs 4 at the same time.
[0022] The saw-teeth cutting unit 5 is located at one side of the
rotary discs 4 for cutting off packing film (a) of a large roll
after rewound on the inflated shaft 7 and the inflated shaft 7 with
the wound packing film becomes a small roll of packing film (a)
with the inflated shaft 7.
[0023] The collect unit 6 is located to extend from under the
rotary discs 4 to the outside of the body 2 for collecting the
small packing film rolls after released from the pair of pinching
heads 40.
[0024] The inflatable shaft 7 is provided with a rubber cover 70
round its outer surface and to be inflated for use and deflated
after the small roll of packing film (a) is finished.
[0025] In using, as shown in FIGS. 4-7, a number of the inflatable
shafts 7 are in advance inflated to expand outward the rubber cover
70, and then placed in the feeding box 3. The inflated shafts 7
therein then naturally fall orderly in the guide passage 30 to let
the lowest one reach the stopper 31 and stopped there. Then the
lowest inflated shaft 7 (or the first one) is aligned to a first
pair of the pinching heads 40, which are then moved inward to pinch
two ends of that first inflated shaft 7 at a first position just
under the stopper tightly between the pair of the rotary discs 4,
and the rotary discs 4 are subsequently to be rotated always
clockwise for 90 degrees, or one quarter of a circle, to carry the
first pair of the pinching heads 40 together with the first
inflated shaft 7 to contact with one side of the last guide wheel
21, with a second pair of the pinching heads 40 rotated at the same
time to the first position just under the lower end of the guide
passage 30 and moved inward to pinch another inflated shaft 7, so
on a third and a fourth inflated shaft 7 pinched by a third and a
fourth pair of pinching heads 40. Next, the inflated shaft 7 at a
second position, or at the side of the last guide wheel 21 is to be
wound with the packing film (a) of the large roll moved by the
guide wheels 21 until the diameter of the wound inflated shaft 7
with the packing film (a) reaches the needed one. Then the rotary
discs 4 are rotated again for 90 degrees to move the small picking
film roll just finished rewinding to a third position that is
opposite to the first position, with the packing film (a) of the
large roll pulled and with the saw-teeth cutting unit 5 swinging
upward to cut the packing film (a) off the large roll. Then the
finished small packing film roll of the first inflated shaft 7 is
released from the pair of the pinching heads 40 that is moved
outward by the moving unit, and drops down on the collect unit 6.
In the meantime, the second inflated shaft 7 at the first position
is rotated for a quarter circle by the rotary discs and then wound
with the packing film (a) of the large roll at the second position,
and so on. In this way the four pairs (the first, the second, the
third and the fourth) of pinching heads 40 can carry four inflated
shafts 7 to be rewound with packing film (a) and release them to
let them drop on the collect unit one by one, and then the inflated
shaft 7 is deflated to enable it pulled off, finishing making four
small packing film rolls with no winding shaft by one round of full
rotation of the rotary discs 4, speeding up operation of rewinding
the large roll into plural small rolls of the packing film (a)
without a shaft. In this way, finished small packing film rolls
need no winding shafts (b), saving a lot cost of and being very
effective for protecting the environment by reusing the inflatable
shafts.
[0026] While the preferred embodiment of the present invention has
been described above, it will be recognized and understood that
various modifications may be made therein and the claims are
intended to cover all such modifications that may fall within the
spirit and scope of the invention.
* * * * *