Technical field
[0001] The present invention relates to a closure device for doors, applicable in the sector
of the locks operated by electrical or magnetic means.
Prior art
[0002] Closure devices for doors comprising a movable bolt and an electric door opener,
assembled in opposite positions in the frame and in the leaf of a door are currently
known on the market.
[0003] In some known devices, the mentioned movable bolt is a spring-loaded bolt which is
kept by the spring in a retracted position, out of the path of the door; the electric
door opener comprising: a latch, an electromechanical mechanism locking the latch
in a closing position and unlocking the latch when electrically operated, allowing
it to rotate to an opening position.
[0004] The mentioned latch comprises a rear body assembled on a rotating shaft and a front
body fixed to a front face of the rear body by means of screws, with the possibility
of being released and the height adjusted with respect to said rear body.
[0005] The front body of the latch defines a front cavity for housing and holding the bolt
in the closing position of the door.
[0006] As indicated, the bolt, made of a ferromagnetic material, has a spring that tends
to keep it in a retracted position while the door leaf is kept open.
[0007] In turn, the door opener incorporates a magnet arranged between the front body and
the rear body of the latch. In the closing position of the door, said magnet magnetically
attracts the bolt, overcoming resistance of the spring that tends to keep it in the
retracted position; said bolt being housed in the front cavity of the front body of
the latch of the door opener.
[0008] In this position, the door leaf is kept locked in the closing position until the
door opener is electrically operated, causing the unlocking of the latch of the door
opener, which allows said latch to be able to rotate to the rear area so as to be
released from the bolt and to allow the opening of the door.
[0009] The arrangement of the magnet between the front body and the rear body of the latch
poses numerous drawbacks, among which the following can be mentioned: the need to
use a strong magnet to move the bolt taking into account that in addition to the resistance
offered by the spring that tends to keep it in the retracted position, said magnet
is arranged behind the front body of the latch, which reduces its attractive capacity
and increases the distance existing between said magnet and the bolt in the retracted
position.
[0010] Another drawback of this closure device is that the magnet is housed at least partially
in a hole or recess defined in the rear body of the latch, which prevents said magnet
from moving in height together with the front body and may cause misalignment of the
magnet with the bolt when adjusting the height of the front body of the latch; a stronger
magnet must be used to ensure the movement of the bolt to the locking position in
the closing position of the door, and this involves a higher manufacturing cost for
the closure device.
Disclosure of the invention
[0011] The closure device for doors object of this invention, which is of the type mentioned
above and described in the preamble of the first claim, has technical features providing
a series of advantages, among which the following can be included: it ensures effective
operation of the closure device using less strong, and therefore lower cost magnetic
means; and a perfect alignment of said magnetic means with the movable bolt, regardless
of whether the front body of the latch is arranged at a greater or lesser height with
respect to the rear body of said latch while the closure device is assembled and fitted.
[0012] This closure device for doors is of the type comprising a movable bolt made of ferromagnetic
material and a door opener, both intended to be assembled in the frame and in the
leaf of a door, such that they are opposite one another in the closing position of
the door; arranging the bolt of a spring moving it to a retracted position, out of
the path of the door leaf; and the electric door opener comprising: a rotary latch
provided with a rear body assembled on a rotating shaft and with a front body provided
with a front cavity and fixed to the rear body, with the possibility of the height
being adjusted by means of screws; an electromechanical mechanism for the locking
and unlocking of the latch in a closing position; and magnetic means which magnetically
attract the bolt to a closing position, housing it in the front cavity of the latch,
in the closing position of the door leaf.
[0013] According to the invention, in order to achieve the proposed objectives, this closure
device for doors has the particularity that the magnetic means, which are in charge
of moving the bolt into the front cavity of the latch, are located in a visible position
on the front face of the front body of the latch in the closing position of the leaf
and are directly opposite the movable bolt, without any element interposed between
same, in the closing position of the door leaf.
[0014] This arrangement of the magnetic means on the front face of the front body of the
latch provides various advantages, among which the following should be mentioned:
the reduction of the distance existing between the magnetic means and the movable
bolt when the door is in the closing position; the possibility of using less strong,
and accordingly lower cost magnetic means for moving the bolt into the latch, which
involves a lower manufacturing cost for the closure device and the magnetic means
being moved together with the front body of the latch when the height thereof is adjusted
with respect to the rear body of the latch of the door opener, therefore being kept
aligned with the bolt once the height of the position of the front body of the latch
is adjusted.
[0015] Another advantage of the invention is the possibility of replacing the front body
of the latch carrying the magnetic means and the application thereof in other already
existing door openers.
[0016] According to the invention, the front body of the latch has at least one recess at
the bottom of the front cavity for housing at least one magnet making up the aforementioned
magnetic means. Said recess of the front body has a depth equal to or greater than
the thickness of the magnet or magnets housed therein, such that each magnet is flush
or slightly penetrating with respect to the bottom of the front cavity of the front
body of the latch.
[0017] According to the invention, each magnet is fixed inside the corresponding recess
of the front body of the latch by means of an adhesive product or by means of press
fitting.
[0018] In one embodiment of the invention, the door opener comprises at least two magnets
arranged at the same height in the front body of the latch and aligned in a direction
parallel to the rotating shaft of said latch, increasing the surface of the bolt subjected
to the magnetic fields of said magnets.
Brief description of the content of the drawings
[0019] To complete the description that is being given and for the purpose of facilitating
comprehension of the features of the invention, a set of drawings is attached to the
present specification in which the following has been depicted in an illustrative
and non-limiting manner:
- Figure 1 shows a schematic top plan view of the closure device for doors of the invention,
partially sectioned, with the bolt and the door opener assembled in opposite positions
in the frame and in the leaf of a door, said door having been depicted in the open
position.
- Figure 2 shows a view similar to the preceding figure, with the door in the closed
position.
- Figure 3 shows a perspective view of the door opener of the closure device of the
preceding figures.
- Figure 4 shows a perspective view of the door opener of the preceding figure, with
the front body of the latch, the set screws thereof and the magnetic means detached
from the rest of the door opener.
- Figure 5 shows a front elevational view of the door opener.
Detailed disclosure of embodiments of the invention
[0020] In Figures 1 and 2, the closure device for doors comprises a door opener (1) assembled
in this case in the leaf (31) of a door and a bolt (2) assembled in the door frame
(32), such that the door opener (1) and the bolt (2) are arranged opposite one another
in the closing position of the door as shown in Figure 2.
[0021] The bolt (2) has a spring (21) moving it to a retracted position, out of the path
of rotation of the leaf, when the door is open as shown in Figure 1.
[0022] The door opener (1) has a rotary latch (11) comprising a rear body (111) assembled
on a rotating shaft (12) and a front body (112), the height of which can be adjusted,
fixed to a front face of the rear body (111) by means of screws (13).
[0023] Said door opener (1) internally comprises a (non-depicted) electromechanical mechanism
for the locking and unlocking of the latch (11) in a closing position.
[0024] The front body (112) of the latch defines a front cavity (113) for receiving the
bolt (2) in the closing position of the door depicted in Figure 2, and two recesses
(114) at the bottom of said front cavity (113) in which there are housed and fixed
respective magnets (14) making up the magnetic means which are in charge of moving
the bolt (2) into the front cavity (113) of the latch, overcoming resistance of the
spring (21), when the door reaches the closing position shown in Figure 2.
[0025] In said position, the door leaf (31) is locked by the bolt and rotation disabled,
and when the door opener (1) is electrically operated, the latch (11) is unlocked,
allowing it to rotate to the rear area so as to be released from the bolt (2), allowing
the opening of the door.
[0026] In the time the opening of the door takes place, the bolt (2) returns to the retracted
position, shown in Figure 1, by the action of the spring (21).
[0027] Said magnets (14) are aligned in a direction parallel to the rotating shaft (12)
of the latch (11) and are kept in a visible position on the front face of the front
body (112) of the latch, as shown in Figure 5, directly opposite the bolt (2), without
the interposition of any element, when the door reaches the closing position.
[0028] In the example shown, the recesses (114) have a height approximately equal to the
thickness of the magnets (14) such that the latter are virtually flush with the bottom
of the front cavity (113) of the front body (112) and do not constitute any impediment
for operation of the door opener (1).
[0029] In the example shown, the magnets (14) are fixed inside the recesses (114) by means
of an adhesive product, although use of other suitable fixing means, for example the
press fitting thereof in said recesses (114), is not ruled.
[0030] Having sufficiently described the nature of the invention as well as a preferred
embodiment thereof, it is hereby stated for all relevant purposes that the materials,
shape, size and arrangement of the described elements may be modified provided that
it does not represent an alteration of the essential features invention which are
claimed below.
1. A closure device for doors; comprising:
- a movable bolt (2) made of ferromagnetic material, assembled in the door frame (32),
and provided with a spring (21) pushing it to a retracted position and,
- an electric door opener (1) assembled in the door leaf (31), opposite the bolt (2)
and comprising:
- a rotary latch (11) provided with a rear body (111) assembled on a rotating shaft
(12), and with a front body (112), fixed to a front face of the rear body (111), the
height of which can be adjusted by means of screws (13), and defining a front cavity
(113);
- an electromechanical mechanism for the locking and unlocking of the latch in a closing
position; and
- magnetic means which magnetically attract the bolt (2) to a locking position inside
the front cavity (113) of the latch (11) of the door opener (1) in the closing position
of the door;
characterised in that the magnetic means, which are in charge of moving the bolt (2) into the front cavity
(113) of the latch (11), are located in a visible position on the front face of the
front body (112) of the latch in the closing position of the door and are directly
opposite the movable bolt (2), without any element interposed between same, in the
closing position of the door.
2. The closure device according to claim 1, characterised in that the front body (112) of the latch (11) has at least one recess (114) at the bottom
of the front cavity (113) in which there is fixed at least one magnet (14) making
up the magnetic means.
3. The closure device according to claim 2, characterised in that each recess (114) of the front body (112) of the latch (11) has a depth equal to
or greater than the thickness of the magnet (14) housed therein, said magnet (14)
being flush or penetrating with respect to the bottom of the front cavity (113) of
said front body (112).
4. The closure device according to claim 2, characterised in that each magnet (14) is fixed inside the corresponding recess (114) of the front body
(112) of the latch by means of an adhesive product, or by means of press fitting.
5. The closure device according to one of claims 2 or 3, characterised in that the door opener comprises at least two magnets (14) arranged at the same height in
the front body (112) of the latch (11) and aligned in a direction parallel to the
rotating shaft (12) of the latch (11).