FIELD OF THE INVENTION
[0001] The present invention relates to a device for sliding door, in particular to a pulley
device for sliding door, in the field of hardware accessories for architectural decoration.
BACKGROUND OF THE INVENTION
[0002] At present, sliding doors are widely used in the door industry for buildings which
are attribute to their ease to install and convenience in use. In the normal case,
the upper ends and lower ends of a sliding door are equipped with pulleys respectively
to match the corresponding upper and lower rails, so that the user can push and pull
the sliding doors conveniently.
[0003] In the prior art,
CN201320016707.2 discloses pulley devices placed at the top or bottom of sliding doors. As shown in
FIG. 1a and FIG. 1b, a slanted circular hole 02 of downward is arranged on the front
facade of a bottom plate, and a cross screw 03 is arranged in the slanted circular
hole 02. When the movable page door 04 is uneven, the cross screw 03 can be rotated
by the screwdriver 05, so that the pulley 01 is raised or lowered, the height of the
sliding door is adjusted. As shown in FIG. 1b, when the pulleys 01 is installed on
a sliding door 04, the assembly has several drawbacks stated below: (1) Since the
slanted circular hole 02 installed with the cross screw 03 is located on the front
facade of the bottom plate, the pulley 01 can only be installed in embedded type,
while cannot realize the paddlewheel type installation, and the paddlewheel type installation
is required to be designed additionally; (2) In practical use, the side of the movable
page door 04 mounted with pulleys 01 is often placed with a drawer and the like furniture,
there is a small gap left between the two. Hence, when using the screwdriver 05 to
adjust the height of the cross screw 03, it is difficult for the screwdriver 05 to
protrude obliquely from the gap into the slanted circular hole 02, so that the adjustment
cannot be performed.
[0004] In the prior art, a pulley device capable of being installed in an upright manner
and an inverted manner are disclosed in
CN201710642591.6. As shown in FIG. 2: the height adjustment mechanism includes an adjustment nut 2
and an adjustment screw 1 which can be raised or lowered when the adjusting nut 2
is rotated, and an adjusting hole 8 penetrate through both the box 3-2 and the bottom
plate 3-1 is provided in the housing 3. In the assembling state, the end of the adjustment
screw 1 abuts against the sliding plate, and the adjusting nut 2 is at least partially
received in the adjusting hole 8. The prior art mentioned above has the following
drawbacks: (1) Since the adjustment hole 8 is exposed, and the application environment
is mainly in home, it is easy to cause some hair or wool to be inserted into the adjustment
hole 8 that wraps around the adjusting screw 1, which affects its work and service
life. (2) The adjustment screw 1 serves as an internal adjustment, and the thread
of the adjusting screw 1 will suffer most of the force. Hence, the thread of the adjusting
screw 1 is easily damaged and the sliding filament is caused after several times of
collision contact sliding plate. Therefore, it is desirable to obtain durable and
stable pulleys, which can be installed at the upper or lower ends of sliding doors
in paddlewheel type installation or embedded type installation.
SUMMARY OF THE INVENTION
[0005] The object of the present invention is to overcome the deficiency that one type pulley
device only can realize either paddlewheel type installation or embedded type installation,
the deficiency that pulley height is not convenient to adjust and the pulleys in prior
art are easy to be damaged, low in reliability and short in service life.
[0006] In order to achieve the aim, a pulley device is provided, comprising a pulley housing;
a sliding plate which is vertically movable and mounted on the pulley housing; a pulley
mounted on the sliding plate; a height adjusting mechanism for adjusting the height
of the pulley; and a damper connecting the sliding plate and the pulley housing.
[0007] The present invention provides a height adjusting mechanism which is capable adjust
the height of the pulley device in both upright mounting and inverted mounting (paddlewheel
type installation or embedded type installation), in which case the protrusion is
reserved for a height adjusting mechanism and a damper (particularly, the overall
thickness of the pulley device matches with the height adjusting mechanism and the
damper, in particular, the pulley receives both height adjusting mechanism and the
damper, so that the thickness of the pulley is consistent that there is no difference
between upright mounting and inverted mounting). In the case of the installation position,
the pulley device can be both protruded from the sliding door body and embedded into
the sliding door body. What's more, it facilitates the engineer to choose the installation
method of the upper and lower the pulley device for the sliding door. Paddlewheel
type installation and embedded type installation have their own advantages and disadvantages
, respectively. The paddlewheel type installation is more convenient, which can be
installed without preset installation slots. The embedded installation embeds the
pulley device in the groove preset on the door body. The space of the pulley device
protruding from the door body is reduced, and the door body appearing as a whole is
more attractive in aesthetic. In the technical solution of the present invention,
the installer can purchase a single pulley and choose either way to install according
to the user's preference.
[0008] The height adjusting mechanism comprised a fixing block inlayed into the pulley housing,
an adjusting assembly penetrating through the fixing block and a second projection
nested on the adjusting assembly. The outer contour of the second projection has a
gradually increasing radius, and the second projection stands against the first projection
at one end of the sliding plate. The distance from the outer contour of the second
projection to the adjusting assembly can be adjusted by rotating the adjusting assembly.
The height adjusting mechanism is further provided with a cover plate for fixing the
fixing block, and the cover plate is fixed on the upper surface of the pulley housing.
The second projection is cam-shaped, and the outer contour of the second projection
is provided with a gear. The second projection is provided with a position limiting
protrusion at both ends of the outer contour on the second projection. The distance
for adjustment is maintained so that the route of the position limiting protrusion
will not circularly change and the adjustment distance can be stably controlled. The
adjusting assembly comprises a front adjusting lever and a back adjusting lever mounted
on the front adjustment lever, and adjusting holes which are generally selected as
hexagon sockets, are provided on both the front adjusting lever and the back adjusting
lever.
[0009] The present invention has additional benefits. To rotate the second projection of
cam-shaped, the installer can rotate the front adjusting lever or the back adjusting
lever by inserting a hex wrench into the hexagon socket and rotating by hand. In this
way, the height of the pulley device can be adjusted. In the present invention, the
problem that the gap between a sliding door and furniture is too small to adjust the
height of the pulley device by using a screwdriver that appears in the prior art will
not occur. As a result, the height adjusting mechanism of the pulley device is not
restricted by the narrow space, and it greatly facilitates the installer to adjust
the height of the pulley device. Moreover, the problem will not occur that after the
pulley device is adjusted by the cooperation of an adjusting nut and an adjusting
screw, the pulley device is not available or damaged caused by some hair or wool inserted
into the adjusting hole. So as that, the working reliability and the service life
of the pulley device can be improved.
[0010] Another better scheme is that the fixing block is provided with a rotating hole for
rotating the front adjusting lever; the first projection is tilted, and the first
projection is matched with the gear on the outer contour of the second projection.
Since the first projection is matched with the gear on the outer contour of the second
projection, the force will be suffered by the fixing block. The fixing block has enough
surface area, thereby, it will not deform and be damaged. In this way, the problem
that the damage to the thread of the adjusting nut can be avoided. Moreover, it's
convenient and easy to adjust the distance of the second projection with a hex wrench
to achieve ascending or descending the pulley device.
[0011] Another better scheme is that the front adjusting lever comprises an anti-falling
step and a connecting pin, the anti-falling step is fitted in the groove of the fixing
block, and the connecting pin passes through a center hole of the second projection,
and a coupling end of the back adjusting lever connects with the back adjusting lever.
The front adjusting lever and the back adjusting lever are integrated to facilitate
the installation and the reliability of the product is improved.
[0012] Another better scheme is that the sliding plate is vertically movable, and the pulley
mounted on the sliding plate is rotatable. Thereby, due to the match between the pulley
and the rail, the pulley in the rail allows the sliding door to move smoothly on the
rail.
[0013] Another better scheme is that the damper is a spring with one end abutting the sliding
plate and the other end abutting the pulley housing. The spring provides the pulley
with a force forcing on the rail, making the pulley runs more smoothly on the rail.
[0014] Another better scheme is that the pulley is connected to the sliding plate by a rivet
which is rotatable, and the pulley partially protrudes from the sliding plate. It's
convenient to open or close the door by sliding via the pulleys rolling on the rails
at the upper and lower ends of the door. The sliding plate includes a plate and a
bump protruding from the plate. The bump is provided with an abutting hole, and one
end of the spring is embedded in the abutting hole. By such abutting manner, the spring
can be effectively compressed between the pulley housing and the sliding plate, which
highlights the cooperation of the spring with the sliding plate, and bring the benefit
the spring force facilitates the rolling of the pulley mounted on the sliding plate.
[0015] Another better scheme is that the sliding plate is provided with a position limiting
groove which is engaged with a position limiting block on the pulley housing. During
installation, the pulley is raised to the minimum distance from the door body and
placed on the rail, then the position limiting block is released, and after then adjust
the front adjusting lever and the back adjusting lever. In this way, the function,
locking the pulley at the minimum distance, can be achieved. This design is convenient
to install and avoid the problem that the installation is blocked due to the gap between
the pulley and the rail is too small to handle.
[0016] The present invention provides a moving door comprising a pulley device and a rail
used for moving the pulley device and the door body, and the rail is located above
or below the door body.
[0017] A pulley device comprises a pulley housing, a sliding plate which is vertically movable
and mounted on the pulley housing, a pulley mounted on the sliding plate, a height
adjusting mechanism for adjusting the height of the pulley, and a damper connecting
the sliding plate and the pulley housing.
[0018] The height adjusting mechanism comprises a first projection and a second projection
that can match with the first projection, and the first projection is disposed on
the sliding plate, and the second projection is mounted on the pulley housing and
rotatable, and the height of the pulley can be adjusted when the first projection
stands against different positions of the second projection. The height adjusting
mechanism further comprises a fixing block mounted on the pulley housing and an adjusting
assembly driving the rotation of the second projection, and the adjusting assembly
penetrates through the fixing block. The second projection stands against the first
projection at one end of the sliding plate. The distance from the outer contour of
the second projection to the adjusting assembly can be adjusted by rotating the adjusting
assembly. The height adjusting mechanism is further provided with a cover plate for
fixing the fixing block, and the cover plate is fixed on the upper surface of the
pulley housing. The second projection is cam-shaped, and the outer contour of the
second projection is provided with a gear. Position limiting protrusions are arranged
at each knot curve of both ends of the outer contour on the second projection. The
adjusting assembly comprises a front adjusting lever and a back adjusting lever mounted
on the front adjustment lever, and hexagonal holes are provided on both the front
adjusting lever and the back adjusting lever.
BRIEF DESCRIPTION OF THE DRAWINGS
[0019]
FIG. 1a is a rear view of the upper and lower pulleys on sliding door in the prior
art;
FIG. 1b is a diagram of the upper and lower pulleys on sliding door in using state
in the prior art;
FIG. 2a is a schematic view of the upper and lower pulleys of the prior art sliding
door;
FIG. 2b is an exploded view of the upper and lower pulleys of the prior art sliding
door;
FIG. 3 is a cross-sectional view showing a pulley device capable of being upright
and inverted mounted according to the embodiment of the present invention;
FIG. 4 is another cross-sectional view showing a pulley device capable of being upright
and inverted mounted according to the embodiment of the present invention;
FIG. 5 is an exploded view of a pulley device capable of being upright and inverted
mounted according to the embodiment of the present invention;
FIG. 6 is a view showing the installation mode of the adjusting assembly of a pulley
device capable of being upright and inverted mounted according to the embodiment of
the present invention;
FIG. 7 is a schematic view showing the height adjustment mechanism of a pulley device
capable of being upright and inverted mounted according to the embodiment of the present
invention;
FIG. 8 is a schematic view of the fixing block of a pulley device capable of being
upright and inverted mounted according to the embodiment of the present invention.
Reference Numbers
[0020]
pulley housing 1; bottom plate 1-1; sliding plate mounting cavity 1-2; position limiting
block 1-3;
first projection 2-1; pulley2-2; sliding plate 2-3; abutting hole 2-4; position limiting
groove 2-5;
height adjusting mechanism 3; fixing block 3-1; second projection 3-2; cover plate
3-3; gear 3-4; position limiting protrusion 3-5; front adjusting lever 3-6; anti-falling
step 3-6-1; connecting pin 3-6-2; back adjusting lever 3-7; groove 3-8; damper 4;
spring 4-1.
DETAILED DESCRIPTION OF ILLUSTRATED EMBODIMENTS
[0021] The present invention will be further described in detail below with reference to
the accompanying drawings and specific embodiments. The following examples are intended
to illustrate the invention but are not intended to limit the scope of the invention.
[0022] An embodiment of the pulley of the present invention is exemplified by a pulley device
mounted on the lower end of the sliding door. As shown in FIG. 3 to FIG. 8, the pulley
device comprises a pulley housing 1, and a sliding plate 2-3 which is mounted on the
pulley housing 1 and can be moved up and down, and a height adjusting mechanism 3
for adjusting the height of the sliding plate 2-3, and a damper 4 that engages the
sliding plate 2-3 and the pulley housing 1. The pulley housing 1 includes a bottom
plate 1-1 and a sliding plate mounting cavity 1-2 on the bottom plate 1-1. The mounting
cavity 1-2 protrudes from the pulley housing 1 and capable to receive the sliding
plate 2-3 so that both paddlewheel type installation or embedded type installation
can be achieved.
[0023] Specifically, the installation mode is present as follows. In the paddlewheel type
installation, the bottom plate 1-1 adjoins with the door body of the sliding door
by being fixed via screws, and the mounting cavity 1-2 protrudes from the door body.
Meanwhile, the height of the pulley device can be adjusted from one side of the bottom
plate 1-1, which is away from the mounting cavity 1-2, via a height adjusting mechanism
3. In the embedded type installation, the mounting cavity 1-2 is embedded in a groove
preset on the door, and the door is attached to the bottom plate 1-1 with the side
close to the mounting cavity 1-2. Meanwhile, the height of the pulley can be adjusted
from the side of the bottom plate 1-1, which is not attached to the door, via the
height adjusting mechanism 3. The installer can purchase a pulley device and choose
either way to install according to the user's preference.
[0024] In some embodiments, the pulley housing 1 is a piece of a slab with a hollow cavity
containing the sliding plate 2-3, the height adjusting mechanism 3 and the damper
4. However, the pulley housing 1 and the height adjusting mechanism 3 work independently
and have no interference with each other. The pulley housing 1 is installed on the
door body without the necessity of distinguishing upright mounting or inverted mounting.
[0025] The specific adjustment situation is present as follows. The height adjusting mechanism
3 is provided with a fixing block 3-1 embedded in the pulley housing 1, and the adjustment
assembly penetrating through the fixing block 3-1, and the second projection 3-2 nested
on the adjustment assembly. The adjustment assembly includes a front adjusting lever
3-6 and a back adjusting lever 3-7 mounted on the front adjustming lever 3-6. The
outer contour of the second projection 3-2 has a gradually increasing radius and stands
against the first projection 2-1 at one end of the sliding plate 2-3. The distance
from the outer contour of the second projection 3-2 to the adjustment assembly can
be flexibly adjusted by rotating the adjustment assembly. Then the adjustment of the
height of the sliding plate 2-3 can be realized. The height adjusting mechanism is
provided with a cover plate 3-3 for fixing the fixing block 3-1 stuck inside the mounting
cavity 1-2. The cover plate 3-3 is fixed on the upper surface of the pulley housing
1. And the cover plate 3-3 is locked with a nut in the groove of the outer surface
of the mounting cavity 1-2 so that the cover plate 3-3 is horizontal identically to
the outer surface of the mounting cavity 1-2. The height adjusting mechanism 3 becomes
a hidden type structure, so as that the wool or hair will not enter the interior of
the height adjusting mechanism 3 and cause the hindering of adjustment. The second
projection 3-2 is cam-shaped, and the outer contour of the second projection 3-2 is
provided with a gear 3-4. The gear 3-4 cooperate with the first projection 2-1 during
in working state, and the height adjusting mechanism 3 does not shift even the sliding
plate 2-3 bounces multiple times. Position limiting protrusions 3-5 are arranged at
each knot curve of both wave-tooth-shaped ends of the outer contour on the second
projection 3-2. The distance for adjustment is maintained so that the route of the
position limiting protrusion 3-5 will not circularly change (turn smaller and larger
back and forth) and the adjustment distance can be stably controlled. Hexagonal holes
are provided on both the front adjusting lever 3-6 and the back adjusting lever 3-7
which belong to the adjusting assembly.
[0026] It should be noted that the second projection 3-2 of the pulley height adjusting
mechanism 3 of the present invention is not limited to the cam shape, and the shape
with a gradually increasing radius (such as a crooked stick, an eccentric wheel, a
torsion bar, etc.) is in the protection scope of present invention. To rotate the
second projection 3-2 of cam-shape, the installer can rotate the front adjusting lever
3-6 or the back adjusting lever 3-7 by inserting a hex wrench into the hexagon socket
by hand. In this way, the height of the pulley device can be adjusted. And the problem
that the distance between a sliding door and furniture is too small to adjust the
height of the pulley device by using a screwdriver will not occur. As a result, the
height adjusting mechanism 3 of the pulley device is not restricted by the narrow
space, and it greatly facilitates the installer to adjust the height of the pulley
device. Moreover, the problem will not occur that after the pulley device is adjusted
by the cooperation of an adjusting nut and an adjusting screw, the pulley device is
not available or damaged caused by some hair or wool inserted into the adjusting hole.
So as that, the working reliability and the service life of the pulley device can
be improved.
[0027] The fixing block 3-1 is provided with a rotating hole for the rotation of the front
adjusting lever 3-6; the first projection 2-1 is tilted and the first projection 2-1
are matched with a gear 3-4 on the outer contour of the second projection 3-2, and
the first projection 2-1 tilted disposed are opposite to the tooth direction of the
gear 3-4, so that the second projection 3-2 will not rotate even meet multiple bounces.
The first projection 2-1 is matched with gear on the outer contour of the second projection
3-2, the force will be suffered by the fixing block 3-1. The fixing block 3-1 has
enough surface area, thereby, it will not deform and be damaged. In this way, the
problem that the damage to the thread of the adjusting nut can be avoided. Moreover,
it's convenient and easy to adjust the distance of the second projection with a hex
wrench to achieve ascending or descending the pulley device. The front adjusting lever
3-6 comprises an anti-falling step 3-6-1, a connecting pin 3-6-2 and a coupling end
of the back adjusting lever 3-7. It is worth noting that the coupling end and the
back adjusting lever 3-7 are integrated. The anti-falling step 3-6-1 is fitted in
the groove 3-8 of the fixing block 3-1. And the anti-falling step 3-6-1 is of a cylinder
shape and rotated with the rotation of the front adjusting lever 3-6. The connecting
pin 3-6-2 penetrates through a center hole of the second projection 3-2. The coupling
end connects with the back adjusting lever 3-7. The front adjusting lever 3-6 and
the back adjusting lever 3-7 are integrated to facilitate the installation and improve
the reliability of the product.
[0028] The sliding plate 2-3 is vertically movable, and the pulley 2-2 mounted on the sliding
plate is rotatable. Thereby, by the cooperation of the pulley 2-2 with the rail, the
pulley 2-2 in the rail allows the sliding door to smoothly move in the rail. The damper
4 is provided with a spring 4-1. The spring 4-1 is received in the mounting cavity
1-2, with one end of the spring 4-1 abutting the sliding plate 2-3 and the other end
abutting the end edge of the mounting cavity 1-2. The spring 4-1 provides the pulley
2-2 with a force acting on the track, making the pulley 2-2 rolls more smoothly in
the track. The pulley 2-2 is connected to the sliding plate 2-3 by a rivet and rotatable,
and the pulley 2-2 partially protrudes from the sliding plate 2-3. It's convenient
to open or close the door by sliding via the pulley 2-2 rolling on the rail at the
upper and lower ends of the door. The sliding plate 2-3 includes a plate and a bump
protruding from the plate. The bump is provided with an abutting hole 2-4, and one
end of the spring 4-1 is embedded in the abutting hole 2-4. By such abutting manner,
the spring 4-1 can be effectively compressed between the mounting cavity 1-2 and the
sliding plate 2-3, which highlights the cooperation of the spring 4-1 and the sliding
plate 2-3, and bring the benefit spring force facilitates the rolling of the pulley
2-2 mounted on the sliding plate. The bottom plate 1-1 is provided with a mounting
hole for fixing the pulley 2-2 on the door.
[0029] The sliding plate 2-3 is provided with a position limiting groove 2-5 which is engaged
with the position limiting block 1-3 on the bottom plate 1-1. During installation,
the pulley 2-2 is raised to the minimum distance from the door body and placed on
the rail, then the position limiting block 1-3 is released, and after then adjust
the front adjusting lever 3-6 and the back adjusting lever 3-7. In this way, the function,
locking the pulley 2-2 at the minimum distance, can be achieved. This design is convenient
to install and avoid the problem that the installation is blocked due to the distance
between the pulley and the rail is too small to handle.
[0030] We have shown and described the embodiment in accordance with the present invention,
it should be clear to those skilled in the art that further embodiments may be made
without departing from the scope of the present invention. In addition, although some
specific terms are used in this specification, the terms are only used for convenience
and do not make any limitation on the invention.
1. A pulley device, comprising:
a pulley housing (1);
a sliding plate (2-3) which is vertically movable and mounted on the pulley housing
(1);
a pulley (2-2) mounted on the sliding plate (2-3);
a height adjusting mechanism (3) for adjusting the height of the pulley; and
a damper (4) connecting the sliding plate (2-3) and the pulley housing (1);
wherein the height adjusting mechanism (3) comprises a first projection (2-1) and
a second projection (3-2) that can match with the first projection (2-1), and the
first projection (2-1) is disposed on one end of the sliding plate (2-3), and the
second projection (3-2) is mounted on the pulley housing (1) and rotatable, and the
height of the pulley (2-2) can be adjusted when the first projection (2-1) stands
against different positions of the second projection (3-2).
2. A pulley device as claimed in claim 1,
wherein the height adjusting mechanism (3) further comprising:
a fixing block (3-1) mounted on the pulley housing (1),
an adjusting assembly drives the rotation of the second projection (3-2), and
the adjusting assembly penetrates through the fixing block (3-1).
3. A pulley device as claimed in claim 2,
wherein the adjusting assembly comprises a front adjusting lever (3-6) and a back
adjusting lever (3-7) mounted on the front adjusting lever (3-6), and adjusting holes
are provided on both the front adjusting lever (3-6) and the back adjusting lever
(3-7).
4. A pulley device as claimed in claim 4,
wherein the second projection (3-2) is cam-shaped, and the outer contour of the second
projection (3-2) has a gradually increasing radius, and the outer contour of the second
projection (3-2) is provided with a gear (3-4).
5. A pulley device as claimed in claim 5,
wherein the second projection (3-2) is provided with a position limiting protrusion
(3-5) at both ends of the outer contour on the second projection (3-2).
6. A pulley device as claimed in claim 6,
wherein the adjusting assembly further comprises an anti-falling step (3-6-1) and
a connecting pin (3-6-2), the fixing block (3-1) is provided with a groove (3-8),
and the anti-falling step (3-6-1) is fitted in the groove (3-8) of the fixing block
(3-1), and the connecting pin (3-6-2) passes through a center hole of the second projection
(3-2).
7. A pulley device as claimed in claim 6,
wherein the fixing block (3-1) is provided with a rotating hole for rotating the front
adjusting lever (3-6);
the first projection (2-1) is tilted, and the first projection (2-1) are matched with
gear (3-4) on the outer contour of the second projection (3-2).
8. A pulley device as claimed in claim 7,
wherein the height adjusting mechanism (3) is further provided with a cover plate
(3-3) for fixing the fixing block (3-1), and the cover plate (3-3) is fixed on the
upper surface of the pulley housing (1).
9. A pulley device as claimed in claim 8,
wherein the damper (4) is a spring, and the spring is received in the pulley housing
(1), with one end of the spring abutting the sliding plate (2-3) and the other end
abutting the pulley housing (1).
10. A moving door provided with a rail, a door body, and
characterized by
a pulley device as claimed in any one of claims 1-9,
wherein the rail is used for moving the pulley device and the door body,
and the rail is located above the door body or below the door body.