U.S. patent number 3,889,896 [Application Number 05/453,380] was granted by the patent office on 1975-06-17 for hose coiling apparatus.
Invention is credited to Arthur C. O'Hara.
United States Patent |
3,889,896 |
O'Hara |
June 17, 1975 |
Hose coiling apparatus
Abstract
Apparatus for assisting in uncoiling and coiling a flexible
hose, cord, or the like, in even layers on a fixed drum. The hose
is uncoiled by pulling the free end in a direction more or less
parallel to the axis of the drum on which it is coiled as an arm
carrying a guide pulley rotates to follow the tangent of hose
leaving the coil about the fixed drum. Springs tensioned by the
uncoiling movement provide a biasing force for rewinding the hose,
rotating the guide pulley and arm in the opposite direction. Novel
motion transfer means are disclosed for producing traversing
movement of the guide pulley along the length of the fixed drum as
the arm carrying the pulley rotates thereby coiling the hose in
even layers.
Inventors: |
O'Hara; Arthur C. (Syracuse,
NY) |
Family
ID: |
23800351 |
Appl.
No.: |
05/453,380 |
Filed: |
March 21, 1974 |
Current U.S.
Class: |
242/386;
242/396.9; 242/397.3; 242/615.2; 137/355.23 |
Current CPC
Class: |
B65H
75/36 (20130101); B65H 75/38 (20130101); Y10T
137/6943 (20150401); B65H 2701/33 (20130101) |
Current International
Class: |
B65H
75/38 (20060101); B65H 75/34 (20060101); B65H
75/36 (20060101); B65h 075/38 () |
Field of
Search: |
;242/86,86.2
;137/355.16,355.23,355.26,355.27 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: McCarthy; Edward J.
Attorney, Agent or Firm: McGuire; Charles S.
Claims
What is claimed is:
1. Apparatus for assisting in the coiling and uncoiling of an
elongated, flexible element in a plurality of layers of
side-by-side revolutions of the element, said apparatus comprising,
in combination:
a. a fixed cylindrical element for receiving the coiled element on
the outer periphery thereof;
b. an elongated arm mounted for rotation about the central axis of
said cylindrical element and arranged with its own axis transverse
to said central axis;
c. pulley means carried by said elongated arm and spaced radially
from said outer periphery of said cylindrical element, and having
an axis of rotation transverse to both said central axis and said
arm axis, whereby the flexible element may extend tangentially from
the coil, over said pulley means and substantially parallel to said
central axis;
d. spring means constructed and arranged to be tensioned by
rotation of said arm in a first direction to exert a biasing force
tending to rotate said arm in the opposite direction;
e. mounting means allowing reciprocating traversing movement of
said pulley means between positions radially spaced from each end
of said cylindrical element; and
f. motion transfer means for imparting a predetermined increment of
said traversing movement to said pulley means in response to each
revolution of said arm in either direction about said central
axis.
2. The invention according to claim 1 and further including a shaft
mounted concentrically with and rotatable about said central axis,
and means connecting said shaft and said arm to transmit rotation
about said central axis from one to the other.
3. The invention according to claim 2 and further including means
connecting said shaft to said spring means to transmit rotation of
said arm in said first direction, through said shaft, to tensioning
movement of said spring means, and to transmit the biasing force of
said spring means through said shaft to tend to rotate said arm in
said opposite direction.
4. The invention according to claim 3 wherein said mounting means
comprises a hinged connection between said arm and said shaft
allowing pivotal movement of said arm about an axis closely
adjacent and transverse to said central axis.
5. The invention according to claim 4 wherein said motion transfer
means comprises mechanism responsive to rotation of said arm in
either direction to transmit motion thereto about the axis of said
hinged connection.
6. The invention according to claim 5 wherein said mechanism
comprises an eccentric member rotatable about an axis substantially
parallel to the axis of said hinged connection.
7. The invention according to claim 2 and further including a
second arm connected to said shaft for rotation therewith, said
motion transfer means being connected between said second arm and
said elongated arm to impart to the latter movement providing said
traversing movement of said pulley means carried thereby.
8. The invention according to claim 7 wherein said second arm is
mounted for rotation about its own axis in response to rotation
about said central axis.
9. The invention according to claim 8 wherein said motion transfer
means comprises a worm gear carried by said second arm and
rotatable about the axis thereof, and said elongated arm carries an
eccentric gear meshed with said worm gear and rotatable thereby to
impart said movement to said elongated arm.
10. The invention according to claim 1 wherein said pulley means
comprises a pulley wheel having two grooves arranged side-by-side.
Description
BACKGROUND OF THE INVENTION
The present invention relates to apparatus for winding and
unwinding a flexible hose, rope, or the like on a non-rotating drum
and, more specifically, to novel means for laying the flexible
element in even layers along the length of the drum.
It is often convenient to provide spring-loaded means for rewinding
an elongated, flexible element on a drum or reel where it is
normally stored, after it has been unwound therefrom. Electrical
cords, ropes for towing and other purposes, and garden hose are
among the elements normally stored on drums when not in use and
arranged to automatically tension a spring as they are unwound. The
energy thus stored in the spring is used to rewind the element
after use.
The present invention is illustrated and described in the context
of a garden hose reel, although the invention is not limited by the
nature of the flexible element used in connection therewith. For
convenience, however, the flexible element will hereafter be
referred to as hose.
Self-winding hose drums may be generally classified by the
direction of movement of the hose with respect to the drum as it is
wound and unwound. In one common type, the hose is moved
tangentially on and off the drum with no significant change in
direction, i.e., it is moved substantially transversely to the drum
axis. In this case the drum is mounted for rotation about its own
axis, and is rotated in one direction by hose removal and in the
opposite direction by the spring force as the hose is rewound. In
the other type, the drum does not rotate, but rather is fixedly
mounted, and the hose passes over a change of direction guide which
is itself rotatable about the drum periphery. The hose is moved,
after passing over the guide, in a direction generally parallel to
the drum axis.
The present invention relates entirely to self-winding drums of the
latter type and has as a principal object the provision of novel
and improved means for insuring that the hose is wound upon the
drum in evenly spaced layers. That is, each revolution of the hose
about the drum is guided to lay adjacent the immediately preceding
revolution to form even layers with no buildup of the thickness of
coiled hose at any point along the drum.
In a more general sense, the object of the invention is to provide
an improved, self-winding mechanism for replacing an elongated,
flexible element on a cylindrical drum after manual removal of the
element from the drum.
Other objects will in part be obvious and will in part appear
hereinafter.
SUMMARY OF THE INVENTION
In accordance with the foregoing objects, the invention comprises a
fixedly mounted, cylindrical drum having end flanges of
considerably larger diameter. A hose, or other flexible element is
anchored at one end, wound around the drum between the flanges, and
passes over a rotatable guide member, to a free end.
The guide member is in the form of a pulley mounted for rotation
about its own axis on one end of an arm which is rotatable about
the drum axis to move the pulley about the periphery of the drum,
in spaced relation thereto. A second arm is also rotatable about
the drum axis and carries a wheel frictionally engaging an outer
surface of one of the end flanges of the drum. As the second arm is
rotated, the wheel carried thereby turns, effecting rotation of a
worm gear, also carried by the second arm.
The first arm, carrying the pulley guide member at one end, carries
at the other end an eccentric gear meshed with the worm gear. As
the eccentric gear rotates, the first arm is moved reciprocally
about an axis transverse to the drum axis, thereby moving the end
carrying the pulley guide transversely and reciprocally with
respect to the drum surface. The gear ratios and dimensions of the
respective elements are such that the pulley guide moves
transversely a distance substantially equal to the diameter of the
hose with each revolution about the drum. Also, the direction of
traverse of the pulley guide is reversed after each movement
thereby of a distance equal to the spacing between the end flanges
of the base.
As the drum is unwound from the drum by pulling the free end, the
arms are caused to rotate as the pulley guide follows the rotation
of the hose. One or more springs are connected at one end to a
shaft rotated by the arms. The springs are tensioned by rotation of
the shaft in the direction of removal of the hose from the drum.
The energy stored in the springs causes counter-rotation of the
shaft and arms, thereby moving the pulley guide in the opposite
direction about the drum with the same transverse motion. Thus, the
hose is wound on the drum in even layers. As a further refinement,
the pulley guide may be provided with two grooves to allow the hose
to shift from one groove to the other, seeking a lateral position
providing a more direct tangential relationship to the diameter of
the coil as this diameter varies with the amount of hose wound on
the drum.
BRIEF DESCRIPTION OF THE FIGURES
FIG. 1 is a front elevational view of a self-winding mechanism for
a hose, or the like, embodying the present invention;
FIG. 2 is a plan view of the mechanism of FIG. 1 with an alternate
construction of one element;
FIG. 3 is an elevational view of a gear element of the mechanism of
FIGS. 1 and 2;
FIG. 4 is a plan view in section on the line 4--4 of FIG. 1;
and
FIG. 5 is an elevational view of the interior of the mechanism,
taken on the line 5--5 of FIG. 4.
DETAILED DESCRIPTION
The flexible element to be wound and unwound with the assistance of
the present invention is illustrated in FIG. 2 in the form of a
common garden hose, denoted generally by reference numeral 10. Hose
10 extends from a fixed end, connected to a water spigot or faucet
(not shown), to wrap around a fixed cylindrical element or drum 12,
seen in section in FIG. 4. Affixed to each end of drum 12 are front
and rear flanges 14 and 16, respectively, essentially comprising
flat, circular plates of somewhat larger diameter than drum 12, as
clearly seen in FIGS. 2 and 4. Hose 10 is wound upon drum 12
between flanges 14 and 16 which provide lateral constraints for the
coil of hose, the difference in diameter between the drum and the
flanges being a matter of design in accordance with the amount of
hose to be stored thereon. Any convenient means (not shown) may be
provided for mounting the unit to a wall or other support, normally
by or through flange 16.
First arm 18 carries at one end a generally U-shaped bracket 20,
fixedly attached to arm 18 and bent at an angle from the axis
thereof. Pulley 22 is rotatably mounted on an axle carried by the
spaced sides of U-bracket 20. As seen in FIG. 2, hose 10 extends
tangentially outward from the portion wound on drum 12, thence over
pulley 22, to a free end (not shown), the fragment of hose
extending past the pulley toward the free end being denoted by
reference numeral 24.
At the end opposite bracket 20, arm 18 carries gear element 26,
mounted for free rotation about axle 28. The end of arm 18 carrying
gear 26 may be split or notched to accomodate the gear and provide
a mounting for the axle. Gear 26 is meshed with worm gear 30,
carried by or formed integrally with second arm 32. The latter is
journaled at one end in bearing support 34 for rotation about its
own axis and carries at the other end wheel 36, mounted coaxially
with arm 32. Wheel 36 is fixedly attached to arm 32, whereby
rotation of the wheel is transmitted to the arm.
Shaft 38 is rotatably mounted on the axis of drum 12, extending at
opposite ends through the centers of both flanges 14 and 16.
Suitable bearings, such as diagrammatically indicated at 40, may be
provided as required to assist proper rotation of shaft 38. Both
arms 18 and 32 are connected to shaft 38 for rotation therewith.
Arm 32 is connected to the shaft by fixed mounting of bearing
support 34 directly thereon, while arm 18 is connected through
hinge element 42, having legs 44 and 46 affixed to arm 18 and shaft
38, respectively. The legs are relatively movable about pin 48,
whereby arm 18 is rotatable both about the axis of shaft 38 and the
axis of pin 48.
Referring particularly to FIG. 5, shaft 38 is affixed to central
spring drum 50. One end of each of springs 52 is attached to
central spring drum 50 and the other end to respective ones of
individual spring drums 54, each rotatably mounted upon one of
spindles 56. All of drums 50 and 54, and springs 52 are mounted
within drum 12, spindles 56 being supported between flange 14 and
plate 58 (FIG. 4), also mounted within drum 12 and supported
thereby in spaced relation to flange 14. As shaft 38 rotates,
central drum 50 rotates therewith. Springs 52 are of the "negator"
type, being so formed that they are naturally biased toward coiling
in a particular direction. In the illustrated embodiment, springs
52 are biased toward coiling about individual drums 54, i.e., in a
clockwise direction about drums 54 as seen in FIG. 5. Rotation of
central dum 50 in a clockwise direction causes counterclockwise
rotation of individual drums 54, due to the reverse connection of
springs 52, thus tensioning the springs. The natural bias of the
springs toward coiling in a clockwise direction about drums 54
produces a force tending to rotate central drum 50 in a
counterclockwise direction.
Operation of the above-described mechanism will now be explained.
When hose is to be unwound from drum 12, the free end is grasped
and pulled manually away from the drum in a direction generally
parallel to the drum axis. As the hose is pulled and unwound from
the drum, pulley 22 tends to follow the rotating tangential
position of the hose. Thus, arm 18 is caused to rotate about the
axis of drum 12, thereby rotating shaft 38 to which arm 18 is
attached through hinge 42. Shaft 38 in turn rotates arm 32 and
central drum 50 about the shaft axis, which is coaxial with drum
12, the direction of rotation of drum 50 being such as to tension
springs 52 as the hose is unwound.
The elements are so constructed and arranged that wheel 36 remains
in frictional engagement with the outer surface of flange 14 as arm
32 rotates about the shaft axis. This engagement causes wheel 36 to
turn about its own axis with revolution of arm 32 about the axis of
shaft 38. Since wheel 36 is fixedly connected to arm 32, rotation
of the wheel produces rotation of arm 32 and worm gear 30 about the
axis of the arm as the latter rotates about the axis of shaft 38.
This, in turn, will produce rotation of gear 26 by a distance equal
to the pitch of worm gear 30 with each revolution thereof.
It will be noted particularly from FIG. 3 that gear 26 is
essentially elliptical in shape, having "low" sides 60 and "High"
sides 62. Although suitable spring biasing means (not shown) may be
provided if desired, gear 26 will remain meshed with worm gear 30
as hose is removed due to the force of the hose on pulley 22
tending to rotate arm 18 about pin 48 in a clockwise direction as
seen in FIG. 4. As the portion of gear 26 which is meshed with worm
gear 30 changes between the high and low sides, the eccentric shape
of the gear produces rotation of arm 18 about pin 48, thereby
causing traversing movement of pulley 22 with respect to the
surface of drum 12, as indicated in FIG. 2 by arrow 64. The pitch
of worm gear 30, and dimensions, location of axes, etc., of other
elements, is such, that one revolution of arm 18 produces
traversing movement of pulley 22 by a distance substantially equal
to the diameter of hose 10. Also, gear 26 is so dimensioned and
arranged with respect to arm 18 that movement of the portion of the
gear meshed with worm gear 30 from the center of one of low sides
60 to the center of one of high sides 62 produces traversing
movement of pulley 22 by a distance substantially equal to the
length of drum 12, i.e., to the distance between flanges 14 and 16.
The direction of traverse automatically changes each time the
portion of the gear meshed with the worm changes from high toward
low to low toward high, and vice versa. Thus, as hose 10 is
unwound, pulley 22 moves to remain substantially on a line
perpendicular to the axis of drum 12 and tangent to the point on
the periphery of the hose coil from which the hose is being
removed.
As previously explained, unwinding of the hose produces rotation of
shaft 38 and central drum 50 in a clockwise direction as seen in
FIG. 5 in order to tension springs 52 during the unwinding. Since
the elements are seen in FIG. 1 from the side opposite that shown
in FIG. 5, unwinding produces counterclockwise rotation, as
indicated by the arrow. In other words, hose 10 is initially placed
on drum 12 by winding it in a clockwise direction as viewed from
the front. The energy thus stored in springs 52 will serve to
counter-rotate the elements upon release of the free end of the
hose, as springs 52 coil about individual drums 54. The spring
movement rotates drum 50 and shaft 38 in a counter-clockwise
direction as seen in FIG. 5, the rotation of shaft 38 being
transmitted to arms 18 and 32 to produce rotation thereof in a
clockwise direction as seen in FIG. 1. The hose is drawn over
pulley 22, as the latter rotates about the periphery of drum 12, in
a direction rewinding the hose on the drum. Traversing movement of
pulley 22 in the direction of arrow 64 is the same as when the hose
was unwound. Thus, since hose 10 is laid on drum 12 (or on
preceding layers of itself) directly from pulley 22, the hose will
be wound in even layers with each revolution lying immediately
adjacent the preceding revolution. A new layer is started only when
one layer has been wound completely to the end flange.
An additional feature, shown in FIG. 4, which may be utilized if
desired, is a centrifugal brake or governor. Arms 66 are pivotally
connected to one another by linkage 68 which is pinned at 70 to
sleeve 71. The latter is mounted for freely sliding movement on
shaft 38, and includes a slot or other appropriate opening to allow
pin 72 to pivotally attach arms 66 directly to shaft 38 and allow
limited longitudinal movement thereon of sleeve 71. Disc 73 is
carried by sleeve 71 and has a brake surface opposing plate 58.
Weights 74 are attached to the ends of each of arms 66. When shaft
38 is at rest, the brake surface of disc 73 is spaced from plate
58. Centrifugal force produced by rotation of shaft 38 causes
weights 74 to tend to move outwardly, thereby moving arms 66 about
their pivotal connection with the shaft and moving sleeve 71 and
disc 73 toward plate 58. When rotation of shaft 38 reaches a
predetermined limit, disc 73 contacts the surface of plate 58 and
acts as a friction brake inhibiting further increase in the
rotational speed of shaft 38. The braking force increases
proportionately to the rotational speed, effectively prohibiting
speeds above a desired limit. It is anticipated that the braking
effect would be applied only in certain instances on rewinding of
the hose, to prevent operation at speeds higher than the limit at
which the mechanism can properly function to coil the hose in even
layers.
It will be noted that pulley 22 is shown in FIG. 1 as having a
single groove and in FIG. 3 as having two, side-by-side grooves.
Although satisfactory operation according to the principles of the
invention is provided by the single groove, the frictional or
binding forces on the hose which must be overcome manually as the
hose is unwound, and by the spring force as it is rewound, are
decreased by use of the double groove pulley. That is, since the
manual force is applied longitudinally in a direction substantially
transverse to the tangential direction of removal of the hose from
the coil, a portion of the force is transmitted to the pulley in
effecting rotation of arm 18. The point along the axis of pulley 22
at which such force is optimally transmitted varies as the total
diameter of the hose coil varies, since this changes the position
of a tangential line from the periphery of the coil. It will be
found that the hose automatically moves from one groove to the
other as the total diameter of the coil changes without requiring
manual adjustment.
Many constructional variations may be practised within the scope of
the invention. For example, rather than the illustrated hinged
connection between arm 18 and shaft 38, the two may be directly
joined (e.g., by providing a fixed extension from arm 18 at
90.degree. thereto, or bending arm 18 90.degree. and connecting the
end directly to the shaft or using the bent portion as the shaft)
and providing sufficient flexibility in the shaft, and/or mounting
means therefor, to allow for the traversing movement of pulley 22.
Suitable means for transmitting to arm 18 the required movement for
reciprocating traverse of the pulley could still, of course, be
provided substantially in the manner disclosed. Also, plate 58 need
not be attached to drum 12, but instead be a thin, floating plate
mounted on spindles 56 to serve as a guide for the springs and
provide double braking action.
It should also be noted that an arrangement of arm 32 such as shown
in FIG. 2 is preferred over that shown in FIG. 4. That is, the axis
of arm 32 should intersect the axis of shaft 38 substantially at
the plane of the surface of flange 14 upon which wheel 36 rotates.
Also, attachment of bearing support 34 to shaft 38 by a hinged
connection will allow compensating movement of arm 32 due to wear
or other facts affecting the diameter of wheel 36, thus reducing
twisting forces on shaft 38 and the bearing supports therefor.
* * * * *