COMPLETE SPECIFICATION
SLlDlNG DOOR BUFFERING DEVICES
The present invention relates to buffering devices for sliding doors
intended to prevent or minimise load forces of a closing or opening sliding door or
other similar panel impinging adversely on a surround frame or other panel
(movable or not) arranged within a surround frame.
Sliding doors and similar panels including window panels are, in many
instances, becoming larger and r. The roller support devices for such
g panels are also improving in their load ng capacity and their y to
minimise rolling on whereby, in use, such g panels can move relatively
quickly and particularly when they are heavy, can develop a significant
um that can cause an adverse impact effect on the surrounding frame
jamb as the panel reaches a closed or open position during a closing or an
opening motion. In some configurations the panel being moved in an opening or
closing motion might engage with another movable or fixed panel. Such sliding
panels generally do need to be ed in a closed position when desired and
would normally include a latch or latch and lock to hold or hold and lock, the panel
in the closed position. Typically such latches include a tongue member mounted
to an edge region of the sliding panel engageable with a latch plate mounted on
an upright member of the surrounding frame or other panel (fixed or moving).
The objective of the present invention is to provide a buffering device for a
sliding panel engageable between the sliding panel and an upright member of
either another sliding panel, fixed panel or surround frame as the g panel
moves towards a closed or open position, the buffering device minimising impact
load forces on the upright member without adversely ing the ability of the
sliding panel to be retained in a closed position, when desired.
ln this specification the term “sliding panel” is used to identify a sliding
door, a sliding window or any other similar panel capable of g between an
open position and a closed position within a surround frame. The sliding panel
itself may be of any uction but will include such panels with an outer frame
and an infill zone of transparent material such as glass, as well as sliding panels
that are non-see through in their construction. Such sliding panels will in use,
normally be, supported by roller wheel assemblies but other conveyance devices
could also be used. The present invention does not rely on any ular sliding
panel construction or conveyance device therefore but in the following the
invention is described in the context of a sliding panel with an outer frame made
of ed metal frame members supporting an internal glass panel. The
invention has most value when used with heavy sliding panels having a weight
greater than 200 kg up to 400 kg (or higher), although, it can be used with lighter
sliding panels.
Accordingly, in a first aspect, the present invention provides a buffering
device for use with a sliding panel including an impact absorber having an
elongate member with a free end, said elongate member being supported by an
operating mechanism whereby the free end of the elongate member is movable
between a first retracted position and a second extended position ve to said
ing ism, said operating mechanism providing a resistance to
nt of said free end as said free end moves from said second on to
said first on under an externally applied load and said operating mechanism
providing a restoring force to restore said elongate member to locate said free
end in said second on in the absence of a said externally applied load, said
buffering device further ing a latch means to, in use, hold a said sliding
panel with said free end of the elongate member ntially in said first
retracted position, said latch means preventing said restoring force of the
operating mechanism tending to move said free end of the elongate member from
said first ted position to said second extended position.
Preferably, the buffering device may further include a support member
enabiing said impact absorber and said latch means to be mounted therefrom,
said support member being configured to be secured to a said sliding panel, a
fixed panel or a surround frame for a sliding or fixed panel.
Conveniently, the impact absorber is positionally adjustable relative to the
support member. Conveniently the latch means is also positionally adjustable
relative to the support member. In one preferred arrangement, the support
member is configured to be mounted internally within a frame member of a sliding
panel, a fixed panel or a surround frame for a sliding or fixed panei.
The operating mechanism may provide a variable resistance to movement
of the elongate member as the free end moves from the second position towards
the first position, said variable resistance increasing as the free end ches
said first position. The ance to movement of the elongate member provided
by the mechanism may be adjustable.
Conveniently, the latch means includes at least one magnetic element.
The at least one magnetic element may be positionally adjustable ve to the
support member. Fixing means may be ed to retain the at least one
magnetic element in an adjusted position.
In a still further aspect, the present invention es a sliding panel
having upper and lower edge zones and spaced upright edge zones joining said
upper and lower edge zones, and a buffering device as d in the preceding
oned adjacent a first said upright edge zone.
Preferably, the sliding panel defines a plane and wherein said elongate
member moves in a direction parallel to either said upper edge zone or said lower
edge zone of the g panel and within or parallel to the plane of said sliding
panel. In one embodiment, the elongate member may be located adjacent to and
below said upper edge zone of the sliding panel. In a second embodiment, the
elongate member may be located adjacent to and above said lower edge zone of
the sliding panel.
The ing mechanism may be adjustably mounted to the sliding panel
whereby the first and the second positions of the elongate member are selectably
adjustable. Conveniently retaining means is also ed to retain the operating
mechanism in a selected position relative to the sliding panel.
In one preferred arrangement, the free end of said elongate member is
adapted, in use, to engage with an upright element of an adjacent structure as the
sliding panel moves towards a closed or an open position. Conveniently, the
adjacent structure is a surround frame or a further sliding or fixed panel.
Preferably, the latch means includes at least one magnetic element. The
at least one magnetic element may be positioned on the first upright edge zone of
the sliding panel. Conveniently the at least one magnetic element is positionally
adjustable relative to the first upright edge zone of the sliding panel.
Preferably, the latch means includes a first magnetic element mountable
on the first upright edge zone of the sliding panel, and a second magnetic
element being attractive to said first magnetic t, said second magnetic
element being mountable on the upright element y in use, in a closed or
open position of said sliding panei, said first and second magnetic elements
engage with ient attractive force to overcome any restoring force d by
said operating mechanism. iently one or both of said first and second
magnetic elements are positionally adjustable.
A preferred embodiment will be described hereafter with nce to the
accompanying drawings, in which:
Fig 1 is a perspective view of a buffering device in accordance with a
preferred embodiment of the present invention;
1O Fig 2 is a top plan view of the buffering device shown in Fig 1;
Fig 3 is a section View taken along fine H of Fig 2;
Fig 4 is a front elevation view of the buffering device shown in Fig 1;
Fig 5 shows a top plan View of a sliding panel including a buffering device
according to a preferred embodiment of the present invention with the sliding
’15 panel in a closed position ng an upright jamb of a le surround;
Fig 6 is a section view taken along line II—II of Fig 5; and
Fig 7 is a detail of area A in Fig 6.
Referring to the gs, Fig 1 shows a buffering device 10 comprised by
a supporting housing 11, an impact absorber 12 and a latch means 13, the impact
absorber 12 and the latch means 13 extending fowvardly from a forward face 14
of the g 11. The impact absorber 12 convenientiy has an te
member 15 in the form of a rod with a forward free end 16 carrying an
engagement pad 17. The engagement pad 17 might be formed from a hard
wearing elastomeric al. The rod member 15 extends rearwardly into a
r housing 18 containing an operating mechanism (not shown) whereby the
rod member 15 can move forwardly from a first relocated position (illustrated) to
an extended second position. The operating mechanism effects this movement
automatically in the absence of any externally applied forces to the rod member
. The rod member 15 is, however, capable of moving from the second
extended position towards the first retracted position when an externally applied
force acts on the engagement pad 17. Conveniently this movement occurs
against a resistance applied by the operating mechanism. The resistance to this
movement might be arranged to increase as the engagement pad 17 approaches
more closely to the fully retracted first position. Preferabiy the resistance levei is
selectabiy adjustable by turning an adjusting knob 19. The operating mechanism
g 18 includes an axial section 20 with an external thread enabling the
housing 18 to be threaded into a threaded bore 21 in the supporting housing 11
whereby the impact absorber 12 is secured with the housing 11 in a manner
allowing its position to be physically adjusted relative to the housing 11. More
particularly, the position of the engagement pad 17 in the first retracted position
(illustrated) is adjustable relative to the supporting housing 11.
As best seen in Figs 5, 6, the supporting housing 11 has an outer shape or
configuration to provide a g fit within the internal space 23 of a vertical
t frame member 22 forming part of an outer frame 24 of a g panel 25.
Conveniently the outer frame 24 has an upper horizontal frame member 26
forming a corner with the upright frame member 22 with the frame members 22,
26 being secured together by fasteners 27. A suitabie glass panel or sheet 28 is
located within the outer frame 24. The supporting housing 11 has a number of
transverse es 29, 30, 31 and 32 to allow the ers 27 to pass through
the passages to secure the housing 11 in a position at the same time as forming
the corner of the sliding panel 25 by connecting the frame members 22, 26. As
can be seen in Fig 6, the g 11 can be inserted into the space 23 as
rated or in an inverted position in which case the passages 31, 32 would be
used for the ers 27. As can be seen in the installed position (Fig 6), the
housing 18 of the impact absorber 12 passes through an opening 33 in a wall 34
of the frame member 22 into and along part of the internal space 35 within the
upper horizontal frame member 26. In this manner, the buffering device 10
including the impact absorber 12 is largely located within the frame members 22,
26 forming the outer frame 24 of the sliding panel 25.
The externaily threaded section 20 is threaded into the threaded bore 21 in
the housing 11 such that the axial position of the housing 18 of the impact
er 12 can be ed. In the vicinity of the forward and region 50 of the
housing 18. the housing 18 has at least one and ably two or more
circumferentially spaced flat sections 51 positioned to engage with a flat end 35 of
a clamp piece 36 held by a screw or similar threaded fastener 37 such that when
engaged any further rotation of the thread section 20 in the threaded bore 21 is
prevented. Thus it is possible to axially adjust the on of the operating
mechanism housing 18 to a desired position and then to hold the housing 18 in
the adjusted position.
In addition. the buffering device 10 includes latch means 13 comprised of a
second threaded bore 38 in the support 11 receiving an externaily threaded
mounting device 39 mounting a magnetic iatch member 40 held to the mounting
device 39 by a fastening screw 41. The magnetic latch member 40 may
conveniently be a rare earth magnet but other similar magnetic members might
also be used. The mounting device 39 is iently positionally adjustable by
rotating the ng device 39 in the threaded bore 38. Again, once a suitable
axial position is achieved, the mounting device 39 is fixed in that position by a flat
section 42 engaging with a second flat end 43 of the clamp piece 36.
Conveniently multiple flat sections 42 are provided circumferentially around the
externally threaded mounting device 39. Conveniently, the mounting device 39 is
configured to threadingly engage with the bore 21 and the threaded section 20 of
the housing 18 is configured to engage with the ed bore 38.
As can be seen in Fig 6, the ic latch member 40 is arranged to
engage with and be held by a second magnetic latch member 44 secured to the
vertical jamb section 45 of a surround for the siiding panel 25. The second
ic latch member 44 might be held in position on the vertical jamb section
45 by a screw or similar fastener 46. in a possibie aiternative arrangement, the
second magnetic latch member 44 might be mounted to the jamb section 45 in a
positionally adjustable manner. The magnetic latch members 40 and 44 might be
similar but of different poies such that they provide an attractive force to one
another. In r alternative, oniy one such latch member 40 or 44 might be
provided where ient attractive force is ed by a le metal against
which it is ed to engage. The magnetic latch 13 provided by one of or both
the latch s 40, 44 needs to provide sufficient holding force to hold the
sliding panel in a closed position against the jamb 45 against any forces provided
by the impact absorber 12 tending to separate the sliding panel 25 from the
upright jamb section 45.
As is shown in the annexed drawings, the preferred buffering device 10 is
shown mounted in an upper right hand corner of the frame 24 of a sliding panel
. The impact absorber 12 is positioned largely in the upper horizontal frame
member 26. In an alternative arrangement, the buffering device might be
rly mounted largely in a lower horizontal frame member forming a lower
corner with the upright frame member 22. The buffering device 10 is described in
the context of the g panel 25 being moved to a closed position, however,
equally the buffering device might be mounted to t the g panel 25
being moved towards an open position. While the above description refers to the
sliding panel 25 potentially engaging with a fixed surround frame, in some
configurations the buffering device 10 might be mounted to protect the g
panel 25 relative to a second adjacent sliding panel or a fixed panel. While it is
preferred that the buffering device 10 be mountable relative to a sliding panel, is.
within or on a sliding panel, it is also possible to mount it within or on a fixed panel
or a fixed surround frame.
It will of course be recognized by those skilled in this art that many
’15 variations to the structures just described are possible without departing from the
concepts disclosed in the claims annexed hereto.
WHAT WE