TECHNICAL FIELD
[0001] The present invention relates to a speed-controllable lifter.
BACKGROUND
[0002] With the increasing number of high-rise buildings, how to escape safely in an emergency
situation draws attention of people. Before the present disclosure was made, although
there were various high-rise escape devices, but none of them has been put into commercial
production and used in public due to their complicated structure and inconvenient
operation, especially due to poor reliability of the brakes. Therefore, people generally
use ladders or air cushions placed on the ground to escape from high-rise buildings
in emergency cases. A known high-rise escape device typically includes a fixed plate,
a movable plate and a hanging ring, the fixed plate and the movable plate are respectively
provided with a central shaft. In use, the fixed plate and the hanging ring are connected
with a rope and are fixed at a high place, the movable plate was hanged on the rope.
An evacuee can be rescued by being connected to the movable plate via a buckle, and
sliding to the ground with the movable plate.
SUMMARY
[0003] In order to solve the above technical problems, the objective of the present disclosure
is to provide a speed-controllable lifter having a novel structure, the escape device
not only has the advantages of simple structure and convenient operation, especially
the brake part has particularly good reliability performance, thereby ensuring that
the evacuee can slide onto the ground safely and reliably and achieve the purpose
of escape.
[0004] The technical solution to achieve the above objectives is as follows, such speed-controllable
lifter comprises a fixed plate, a movable plate and a hanging ring, the fixed plate
and the hanging ring being connected together with a sliding rope, the movable plate
being hanged on the sliding rope, the sliding rope being wound around a winding wheel
arranged in the fixed plate with ends being fixed. A speed control device is provided
in the fixed plate, the speed control device comprises a stop hub, two stop pads,
two arc-shaped stop pad supports and an adjustment means; the adjustment means comprises
an upper camshaft, a lower camshaft and an adjustment shaft arranged on the upper
camshaft, an opening degree between movable ends of the two stop pad supports is adjustable
by the adjustment shaft; the winding wheel is arranged on an outer periphery of the
stop hub; a brake device is provided in the movable plate, the brake device comprises
a brake drum, two brake pads, two arc-shaped brake pad supports and a brake means;
the brake means comprises a driving shaft, a driven shaft and a control bar arranged
on the driving shaft, a degree of tightness of movable ends of the two brake pads
is controllable by the control bar.
[0005] In some embodiments, the upper camshaft and the lower camshaft are oppositely arranged,
each on one side of a respective one of the two arc-shaped stop pad supports, and
are hinged together by a connecting lever, the adjustment shaft is fixedly arranged
on the upper camshaft, the adjustment shaft is provided with a limit step, and an
arc-shaped rack is provided on the fixed plate to engage with the limit step.
[0006] In some embodiments, the driving shaft and the driven shaft are oppositely arranged,
each on one side of a respective on of the two arc-shaped brake pad supports, and
are hinged together by a connecting lever, the control bar is fixedly arranged on
the driving shaft, a pressure spring is provided between movable ends of the two brake
pad supports, the control bar and the pressure spring cooperate to control a tightness
of the movable ends of the two brake pad supports. In some embodiments, a pressure
spring guide sleeve is arranged around a periphery of the pressure spring, a length
of the pressure spring guide sleeve is shorter than a length of the pressure spring
in its nature state.
[0007] In some embodiments, a limiting buckle is provided on the movable plate, and the
limiting buckle is engaged with the control bar, limiting a movement of the control
bar.
[0008] The speed-controllable lifter of the present disclosure has the advantages as follows:
compared with the prior art, the speed-controllable lifter provided by this invention
mainly improves the braking components, not only provides simpler structure, more
convenient operation, but also greatly improves the reliability of escape. First,
with such speed control device installed in the fixed plate, on the one hand, one
can adjust the sliding speed of the movable plate within a certain range to meet different
needs of different evacuees to escape safely. On the other hand, the purpose of escape
can be achieved regardless of whether the evacuee is able to control the speed of
the movable plate. When the evacuees are completely unable to escape by themselves,
or even lose sense or movement, by using the fixed plate adjustment shaft a person
at the high place can help the evacuee slide onto the ground safely (In that case,
the movable plate functions as a pulley). Second, with such speed control device installed
in the fixed plate, the speed of the movable plate can be controlled within a certain
range by operating the fixed plate, it is easier and more convenient to control the
speed of the movable plate, preventing the evacuee from sliding downwards at a speed
that is too high by accident, for example, due to improper operation or other reasons.
Finally, since the brake structures of the fixed plate and the stop structures of
the movable plate are the same, which are obtained by modifying the brake device of
mature technology, they would have the advantages of good reliability, simple manufacture,
dual insurance of sliding speed control, and therefore the product may be easily accepted
by public.
BRIEF DESCRIPTION OF THE DRAWINGS
[0009]
FIG. 1 is a side view showing an embodiment of the present disclosure.
FIG. 2 is a left side view of Figure 1, with a buckle, a dust cover, an adjustment
shaft and a control bar omitted.
FIG. 3 is a right side view of Figure 1.
Figure 4 is a cross-sectional view of Figure 1 taken along a line A-A, in which a
brake means of a movable plate is in an initial configuration.
Figure 5 is an enlarged view of a portion M of Figure 4, but with the brake means
changed to the operation configuration, that is, the driving shaft is rotated by 90
degrees.
Figure 6 is a cross-sectional view of Figure 2, taken along a line B-B;
[0010] Where: fixed plate 10, plate body 101, plate cover 102, upper camshaft 103, lock
nut 1031, adjustment shaft 1032, rack 10321, connecting lever 104, lower camshaft
105, linkage arm 1051, central shaft 106, bearing 1061, washer 1062, fastening nut
1063, key 1064, sliding rope 107, inlet opening 1071, outlet opening 1072, winding
wheel 1073, stop hub 108, stop pad 109, stop pad support 110, hanging ring 20, movable
plate 30, housing 301, housing cover 302, dust cover 3021, buckle 303, control bar
304, fixing nut 305, driving shaft 306, connecting shaft 307, driven shaft 308, cam
3081, rocker 309, hinge pin 310, brake pad 311, brake pad support 312, movable end
3121, fixed end 3122, brake drum 313, inner lock nut 3131, spacer 3132, pressure spring
guide sleeve 314, pressure spring 3141, central shaft of movable plate 315, winding
wheel of movable plate 316, key 317.
DESCRIPTION OF THE EMBODIMENTS
[0011] The speed-controllable lifter according to the present disclosure includes a fixed
plate, a movable plate and a hanging ring. The fixed plate has a speed control device,
the speed control device includes a stop hub, two stop pads, two arc-shaped stop pad
supports and an adjustment means. The adjustment means includes an upper camshaft,
a lower camshaft and an adjustment shaft arranged on the upper camshaft, an opening
degree of movable ends of the two stop pad supports is adjustable via the adjustment
shaft. A brake device is provided in the movable plate, the brake device includes
a brake drum, a brake pad, two arc-shaped brake pad supports and a brake means; the
brake means includes a driving shaft, a driven shaft and a control bar which is arranged
on the driving shaft, movable ends of the two brake pad supports are controlled by
the control bar.
[0012] For better understanding of the present disclosure, the embodiments are further described
in detail below with reference to the drawings. Referring to FIG. 1, as a whole viewed
from outside, the speed-controllable lifter according to this embodiment includes
a fixed plate 10, a hanging ring 20 and a movable plate 30. In use, the fixed plate
10 is fixed at a high place, a rope 107 is also fixed at a high place via the hanging
ring 20. The movable plate 30 is slidably hanged on the sliding rope 107. A protruding
portion of a central shaft 106 can be seen protruding out from the middle of a plate
cover 102 viewed from outside of the fixed plate 10. The protruding portion is configured
to connect with a handle as an attachment part, for resetting sliding rope 107 after
having been pulled out. A plate body 101 is connected to the plate cover 102 in a
snap-fit manner. An upper camshaft 103, a lock nut 1031, an adjustment shaft 1032,
a connecting lever 104, a lower camshaft 105 and a linkage arm 1051 can be seen from
the right side of the plate body 101. The adjustment shaft 1032 and linkage arm 1051
are fixed by respective lock nuts 1031. The connecting lever 104 has two ends respectively
hinged to the upper camshaft 103 and the lower camshaft 105 such that they are linked
together in motion. A left side of a housing 301 of the movable plate 30 is connected
with a housing cover 302 in a snap-fit manner, a buckle 303 is provided on the housing
cover 302, and a dust cover 3021 is arranged at a center portion of the housing cover
302. The right side portion of the housing 301 has a configuration identical to the
right side portion of the plate body 101 of the fixed plate 10. A control bar 304
is fixedly arranged on an exposed portion of a driving shaft 306 via a fixing nut
305. Two ends of a connecting shaft 307 are respectively hinged to ends of the driving
shaft 306 and a driven shaft 308, so that the two shafts 306, 308 are linked together
in motion.
[0013] Referring to FIG. 2, which is the left side view of FIG. 1, in which some components
such as the adjustment shaft 1032 and the control bar 304 shown in FIG. 3 are not
shown. The fixed plate 10 and the movable plate 30 are circular components. The central
shaft 106 is provided at a central portion of the fixed plate 10. The protruding portion
at the axial end of the central shaft 106 has a square cross section. The sliding
rope 107 enters the movable plate 30 via an inlet opening 1071, and is wound around
a winding wheel 316 in the movable plate, and then exits from the movable plate via
the outlet opening 1072, and the end of the sliding rope 107 is fixed to the hanging
ring 20. The fixed plate 10 and the movable plate 30 are provided with pins to fix
fixed ends 3122 of the stop pad supports 110 and a fixed end of the brake pad supports
312, which will be described in detail later.
[0014] Referring to FIG. 3, the upper camshaft 103 and the lower camshaft 105 of the fixed
plate 10 are arranged one above another at the outside of the plate body 101. The
adjustment shaft 1032 is fixed on the upper camshaft 103. Two ends of the connecting
lever 104 are respectively hinged to one end of the adjustment shaft 1032 and the
linkage arm 1051 at the lower camshaft 105 such that they are linked together in motion.
The body of the adjustment shaft 1032 is provided with a limit step, and an arc-shaped
rack 10321 is provided on the plate body 101 to engage with the limit step. During
operation, the adjustment shaft 1032 is pulled to move the limit step along the rack
10321. In the meanwhile, the upper camshaft 103 and the lower camshaft 105 rotates
and accordingly adjusts clearance between the stop hub 108 and two stop pads 109,
that is, adjusts an opening degree of the movable ends 3121 of the two stop pad supports
110.
[0015] The movable plate 30 has a configuration at its outside substantially identical to
that of the fixed plate 10, with the brake device and its brake means and the speed
control device and its adjustment means only different in usage. A speed of the movable
plate 30 on the sliding rope 107 can be preset through the adjustment shaft 1032 of
the fixed plate 10(accordingly, the engagement between the limit step and the rack
10321 is required), while the control bar 304 of the movable plate 30 is provided
for the evacuee to operate in real time. Where, the driving shaft 306 and the driven
shaft 308 are arranged one above another, and the control bar 304 is fixed on the
driving shaft 306, two ends of the connecting shaft 307 are hinged to one end of the
driving shaft 306 and a rocker 309 of the driven shaft 308, such that the driving
shaft and the driven shaft are linked together in motion.
[0016] Referring to FIG. 4, 5, and 6, through which, the internal structure of the fixed
plate 10 and the movable plate 30 can be seen clearly. In the fixed plate 10, the
sliding rope 107 is wound around a winding wheel 1073, and the winding wheel 1073
is fitted around a periphery of the stop hub 108 of the speed control device. In addition
to the stop hub 108, the speed control device further includes two stop pads 109,
two arc-shaped stop pad supports 110 and an adjustment means. The adjustment means
is formed by the upper camshaft 103, the lower camshaft 105 and the adjustment shaft
1032 arranged on the upper camshaft 103. An opening angle between the movable ends
of the two stop pad supports 110 is adjustable by the adjustment shaft 1032. The stop
pads 109 and the stop pad supports 110 are sequentially arranged inside an inner ring
area of the stop hub 108.
[0017] Since the internal structures of the fixed plate 10 and the movable plate 30 are
substantially the same, that is, the components such as the stop hub 108 and the brake
drum 313, the stop pad 109 and the brake pad 311, the stop pad support 110 and the
brake pad support 312 are only called differently, i.e., with different names (for
convenience of description). Therefore, the structure will be described in detail
hereinafter with the movable plate 30 as example.
[0018] The winding wheel 316 of the movable plate is arranged around the outer periphery
of the brake drum 313. The sliding rope 107 entering from the inlet opening 1071 is
wound around the winding wheel 316. The terminal end of the sliding rope 107 extends
out from the outlet opening 1072 and is fixed to the hanging ring 20. The brake pad
311 and the brake pad support 312 are arranged in the brake drum in sequence(the brake
pad 311 and the brake pad support 312 are formed integrally, as one piece). The brake
drum 313 is coupled to the central shaft 315 of the movable plate via a key 317. The
brake pad supports 312 are in the form of two arc-shaped plates, with the fixed ends
3022 thereof positioned by a respective hinge pin 310, A driving block extends from
the movable end 3121 of each arc-shaped plate. The driving shaft 306 and the driven
shaft 308 are respectively arranged driving block at two opposite sides of the two
driving blocks when considering the two driving blocks as a unit.
[0019] A pressure spring 3141 and a pressure spring guide sleeve 314 are arranged between
the two driving blocks. when the driving shaft 306 rotates under the control of the
control bar 304, the cams 3081 of the driving shaft and the driven shaft push the
two driving blocks moving toward each other, causing the brake pad support 312 and
the brake pad 311 as one piece move away from and disengage from the brake drum 313.
Therefore, a clearance is formed between the brake drum 313 and the brake pads 311,
which increases the slip speed of the rope and thus the movable plate. The slip speed
is determined by the rotation angle of the cam 3081 by the control bar 304. The pressure
spring guide sleeve 314 has a length shorter than a length of the pressure spring
3141 in its nature state.
[0020] In addition, in order to ensure that the person who are completely unable to escape
by themselves, the movable plate 30 is provided with a limiting buckle for the control
bar 304, and the limiting buckle is configured to fix the control bar 304, so that
the pressure spring 3141 is in a compressed state and the brake is released. In that
case, the movable plate 30 becomes a pulley, and its sliding speed is controlled by
the adjustment shaft 1032 of the fixed plate 10.
[0021] In use, the fixed plate 10 and the hanging ring 20 are fixed in a proper position
on the main body of the building, for example, near an escape window, and in the meanwhile
the movable plate 30 is suspended on the sliding rope 107. The evacuee may wear a
helmet and a protective vest, after a connecting latch on the vest belt having been
connected to the buckle 303 of the movable plate 30, the evacuee can then get down
over the window. Since the control bar 304 on the movable plate 30 is in an initial
state at the beginning, that is, the pressure spring 3141 is in the uncompressed state,
the movable plate 30 is unable to slid downwardly. When the evacuee presses the control
bar 304, a clearance is thus formed between the brake drum 313 and the brake pad 311,
and therefore the evacuee is able to slide downwardly due to his or her own weight.
In case that there is a need to pause the sliding due to unexpected situation, it
just needs to release the control bar 304. After the previous evacuee having been
slidden down onto the ground, the latter evacuee at the high place may reset the rope
by connecting the handle as an attachment to the protruding portion of the central
shaft 106 of the fixed plate 10 and rotating the winding wheel 1073 in a reverse direction,
and therefore the lifter can be used repeatedly for escape.
1. A speed-controllable lifter, comprising: a fixed plate (10), a movable plate (30)
and a hanging ring (20), the fixed plate (10) and the hanging ring (20) being connected
together with a sliding rope (107), the movable plate (30) being hanged on the sliding
rope (107), the sliding rope (107) being wound around a winding wheel (1073) arranged
in the fixed plate (10) with ends of the sliding rope (107) being fixed, Characterized in that: a speed control device is provided in the fixed plate (10), the speed control device
comprises a stop hub (108), two stop pads (109), two arc-shaped stop pad supports
(110) and an adjustment means; the adjustment means comprises an upper camshaft (103),
a lower camshaft (105) and an adjustment shaft (1032) arranged on the upper camshaft
(103), an opening degree between movable ends of the two stop pad supports (110) is
adjustable by the adjustment shaft (1032); the winding wheel (1073) is arranged on
an outer periphery of the stop hub (108); a brake device is provided in the movable
plate (30), the brake device comprises a brake drum (313), two brake pads (311), two
arc-shaped brake pad supports (312) and a brake means; the brake means comprises a
driving shaft (306), a driven shaft (308) and a control bar (304) arranged on the
driving shaft (306), a degree of tightness of movable ends of the two brake pad supports
(311) is controllable by the control bar (304).
2. The speed-controllable lifter of claim 1, wherein the upper camshaft (103) and the
lower camshaft (105) are oppositely arranged, each on one side of a respective one
of the two arc-shaped stop pad supports (110), and are hinged together by a connecting
lever (104), the adjustment shaft (1032) is fixedly arranged on the upper camshaft
(103), the adjustment shaft (1032) is provided with a limit step, and an arc-shaped
rack (10321) is provided on the fixed plate (10) to engage with the limit step.
3. The speed-controllable lifter according to claim 1, wherein the driving shaft (306)
and the driven shaft (308) are oppositely arranged, each on one side of a respective
on of the two arc-shaped brake pad supports (312), and are hinged together by the
connecting lever (104), the control bar (304) is fixedly arranged on the driving shaft
(306), a pressure spring (3141) is provided between movable ends (3121) of the two
brake pad supports (312), the control bar (304) and the pressure spring (3141) cooperate
to control a tightness of the movable ends of the two brake pad supports.
4. The speed-controllable lifter according to claim 3, wherein a pressure spring guide
sleeve (314) is arranged around a periphery of the pressure spring (3141), a length
of the pressure spring guide sleeve (314) is shorter than a length of the pressure
spring (3141) in its nature state.
5. The speed-controllable lifter according to claim 1, wherein a limiting buckle is provided
on the movable plate (30), and the limiting buckle is engaged with the control bar
(304), limiting a movement of the control bar (304).