[0001] This invention relates to a method of manufacturing and arranging in operating positions
operating devices for a lock intended for a door or the like, the method being in
accordance with the preamble of claim 1. The invention also relates to an operating
device mechanism and a lock in which the operating device mechanism is installed.
[0002] Locks and the operating devices thereof are conventionally manufactured of metal.
However for certain uses it is also known to manufacture separate lock operating devices
of plastics material. The manufacture and assembly of locks of numerous separate parts
is both laborious and costly. Also the storage and handling of numerous parts is complicated.
[0003] An aim of the present invention is to provide a new method of manufacturing, assembling
and arranging so as to be operable, a lock and its constituent parts, by means of
which the drawbacks mentioned above can be minimised. An aim is specifically to simplify
the manufacture and assembly of lock parts so that the transfer and handling of numerous
separate lock parts is avoided.
[0004] According to one aspect of the present invention there is provided a method as claimed
in the ensuing claim 1 of manufacturing and arranging in operating positions operating
devices for a lock. The transfer and handling of a uniform moulding incorporating
lock operating devices is thereby accomplished. Since detaching of the lock parts
from each other is achieved by means of a pressing movement in one direction, the
assembling step or phase is simplified and, if desired, easily automated.
[0005] The pressing step and the assembly of the lock parts can be more easily accomplished
if the body element and the operating devices are of at least substantially equal
thickness in a direction normal to the basic plane.
[0006] Advantageously the body element is cast to comprise a substantially uniform frame
structure including at least one bolt opening. Thus, after detachment, all the parts
are kept together ready for arrangement in their operating positions.
[0007] Conveniently the operating devices include also at least one spring member. With
advantage, from the viewpoint of detaching and casting of the parts, the operating
devices are cast so as to be located on either side of the body element.
[0008] In a preferred embodiment of the invention, the operating devices include a latch
bolt and a follower, which are arranged in the moulding on the same side of the body
element. The spring member can then, with advantage, be a return spring for the latch
bolt which is arranged in the moulding on a different side of the body element to
that of the latch bolt and the follower.
[0009] The follower is advantageously provided with a spring of its own which is cast to
be part of the body element.
[0010] When necessary a dead bolt and its preferably key operated bolt lever element may
additionally be cast to the moulding. To enable these parts to be easily kept apart
from the parts of the latch bolt mechanism during assembly, a partition wall is cast
to the body element and separates the latch bolt mechanism from the dead bolt mechanism.
The partition wall can be dimensioned to be flexible so that after installation it
guides the bolt lever element.
[0011] In practice the dead bolt and the bolt lever element are advantageously cast so as
to occupy different sides of the body element in different planes with regard to the
body element.
[0012] The moulding can be designed so as to comprise all the essential component parts
of the lock. The casting process can, however, be simplified, if the moulding is installed
in a separate lock having a front plate and a lock housing fixed thereto. In this
case the front plate and lock housing can be made of different material to the plastics
injection moulded operating devices. The pressing step can be accomplished directly
against the lock housing so that the body element and the operating devices remain
inside the lock housing after pressing. When the installation occurs directly in the
lock housing in one direction along a rectilinear path, the assembly can be fully
automated.
[0013] In order to assemble and arrange for the operating devices to be in their operating
positions, the connection members or connection points are so located in the moulding
that when the operating devices are broken from the body element in the pressing stage
they are arranged relative to each other in their correct positions required for their
operation thereof. Further at least one guiding member may be cast to the body element.
In this case the guiding member(s) together with the spring for the follower guide
the follower into a correct position when the follower is turned for the first time
after the pressing step or phase. In addition the follower may have a guiding surface
which, when the follower is turned, guides, together with guiding surfaces of the
body element, simultaneously the spring for the latch bolt into a correct place and
to a prestressed operating position, whereby the spring for the latch bolt presses
the latch bolt towards its operating position.
[0014] The lock housing is with advantage provided with a stub shaft. In this case the moulding
may include a wedge element which during the pressing step, under the influence of
the stub shaft, guides the bolt lever element in the direction of the movement according
to the bolt operation of the dead bolt towards the dead bolt simultaneously pressing
the dead bolt into its operating position, in which it extends beyond the inner edge
of the bolt opening in the lock case. In this way the dead bolt is arranged to be
directly in its operating condition as a consequence of the pressing phase.
[0015] According to another aspect of the present invention, there is provided an operating
device mechanism intended for a lock to be installed to a door or the like and which
comprises a one piece moulding of plastics material.
[0016] According to a further aspect of the present invention there is provided a lock intended
for a door or the like and including a front plate and a lock housing fixed thereto
and in which a plastics operating device mechanism is installed.
[0017] An embodiment of the invention will now be described, by way of example only, with
particular reference to the accompanying drawings, in which:
Figure 1 is a side view of a moulding for a lock case of a door lock provided according
to the invention;
Figure 2 shows the moulding of Figure 1 viewed from below;
Figure 3 is a section taken on the line III-III of Figure 1;
Figure 4 is a section taken on the line IV-IV of Figure 1;
Figure 5 shows the moulding of Figure 1 viewed from the left side;
Figure 6 is a section taken on the line VI-VI of Figure 1;
Figure 7 is a section taken on the line VII-VII of Figure 1;
Figure 8 is an axonometric view of the moulding of Figure 1;
Figure 9 is an enlarged axonometric view of a part of the moulding of Figure 1 in
which the fixing of a latch bolt to a body element is apparent;
Figure 10 is an enlarged axonometric view of a part of the moulding of Figure 1 in
which the fixing of a follower to a body element is apparent;
Figure 11 is an enlarged axonometric view of a part of the moulding of Figure 1 in
which the fixing of a latch bolt spring to a body element is apparent;
Figure 12 is an enlarged axonometric view of a part of the moulding of Figure 1 in
which the fixing of a dead bolt to a body element is apparent;
Figure 13 is an enlarged axonometric view of a part of the moulding of Figure 1 in
which the fixing of a displacement piece for a dead bolt to a body element is apparent;
Figure 14 shows the moulding of Figure 1 installed in a body housing of a lock case
before the bolts are arranged so as to be operable;
Figure 15 is a section taken on the line XV-XV of Figure 14;
Figure 16 shows the moulding of Figure 1 installed in a body housing of a lock case
after the bolts have been arranged so as to be operable;
Figure 17 is a section taken on the line XVII-XVII of Figure 16; and
Figure 18 shows the moulding of Figure 1 installed in a body housing of a lock with
the bolts in protruding operating positions.
[0018] In Figure 1 reference numeral 1 designates a moulding, or piece of casting, for operating
devices of a lock. The moulding is preferably made in one piece by injection moulding
of plastics material. The moulding includes a frame-like body element 2 having bolt
openings 2a and 2b and to which all the essential operating devices of the lock, as
a consequence of the moulding or casting, are either fixed by connection members or
connection points (as described in more detail later on) or which are permanently
integrated as parts of the body element. In the embodiment shown these operating devices
include a latch bolt 3, a spring 4 for the latch bolt, a follower 5 for moving the
latch bolt through means, for instance a handle, to be installed at an operating axis
5', a spring 6 for the follower, a dead bolt 7 and a bolt lever element 8 for moving
the dead bolt 7.
[0019] As can be more clearly seen in Figures 2 to 8, the operating devices are located
on opposite sides of a central plane of the body element 2. In particular the operating
devices and the body element are conveniently positioned in three separate spaced
apart and parallel planes. The moulding is made by injection moulding, preferably
using a two part mould including only one joint surface. The operating devices are
located relative to the body element 2 and to each other so that the moulding 1 can
be installed as one piece in one direction along a rectilinear path into a desired
lock casing (cf. Figure 14). This enables full automation of the assembly process
to be achieved using simple devices. The design and location of the operating devices
relative to each other, as well as the design of the body element 2, are also so selected
that there is sufficient space provided between the movable parts for the walls of
the casting mould and for the movements required by the normal operation thereof after
installation of the moulding and detachment of the movable parts. In addition the
body element 2 is designed so as to comprise guiding surfaces 2c and 2d which guide
the movements of the bolts after installation as is described in more detail later
on.
[0020] Figure 9 shows connection members A and B by means of which the latch bolt 3 is fixed
at its arm part 3a to the body element 2 of the moulding 1. Figure 10 shows connection
members C and D by means of which the follower 5 is fixed to body element 2. Figure
11 shows connection members E and F by means of which the spring 4 for the latch bolt
is fixed to the body element 2. Figure 12 shows connection members G and H by means
of which the dead bolt 7 is fixed to the body element 2, and Figure 13 shows connection
members I and J by means of which the bolt lever element 8 is fixed to the body element
2.
[0021] Figure 14 shows a lock casing 9 having a lock housing 10 and a front plate 11 fixed
thereto and provided with bolt openings. A cover for the lock housing 10 is not shown
in the drawings. The location and the dimensions of the connection members A - J are
selected so that when the moulding 1 is installed, as shown in Figure 14, in one direction
along a rectilinear path into the lock housing 10 and the operating devices are pressed,
the connection members can be simultaneously broken and the operating devices moved
relative to each other so as to occupy a common plane with the body element.
[0022] With reference to Figures 14 and 16, the installation of the latch bolt part of the
lock and arranging the latter to be operable occurs as follows. After the moulding
1 has been pressed into the lock housing 10 so that the connection members A - J are
broken and the operating devices are detached from the body element 2, limiting members
12 of the latch bolt 3 are pressed towards the arm part 3a of the latch bolt guided
by the guiding members 13 in the lock housing. In addition the arm part 3a is guided
by the guiding surfaces 2c of the body element. The spring 6 for the follower is an
integral part of the body element 2 and is designed and positioned so that the follower
5 can be installed in the lock casing 9 in the same position as it is when moulded.
The lock housing 10 includes a guiding opening 10a for the follower 5, into which
the follower 5 enters so that it is turnably journalled in the guiding opening 10a
(cf. Figures 15 and 17). The spring 4 for the latch bolt is located between the follower
5 and a guiding cam 14 in the body element in such a position which allows installation
of the latch bolt 3 in the same position as it occupies when moulded. The situation
corresponds to that shown in Figure 14.
[0023] When the follower 5 is turned for the first time by means of a handle or the like
(not shown) about an operating axis 5', the return spring 4 for the latch bolt turns,
due to a guiding surface 5a on the follower 5 and a guiding cam 14 in the body element,
into its operating position, in which it remains under guidance of another guiding
surface 5b on the follower 5 and the guiding cam 14. Simultaneously, the latch bolt
3 is pushed by the spring 4 of the latch bolt towards its operating position, whereby
the limiting members 12 of the latch bolt arm 3a are released and prevent the latch
bolt 3 from being pressed back into an inner position corresponding to its installation
position. In addition, at the same time a recess 5c in the follower 5 is moved towards
the head of the spring 6 of the follower. The spring 6 enters the recess 5c and is
retained in the recess by its spring force. When a handle or the like is pressed below
a horizontal plane, a guiding member 5d on the follower 5 moves beyond a guiding member
15 located in the body element 2. The situation corresponds to that shown in Figure
16. At the same time the guiding member 15 prevents the follower 5 from moving into
its original position and keeps the handle in its correct position and the spring
6 of the follower prestressed.
[0024] A wedge element 16 is used to install the bolt lever element 8 and the dead bolt
7. For this purpose the wedge element 16 cooperates with a stub shaft 17 arranged
in the lock housing 10. Before the pressing measure associated with the installation,
the wedge element 16 and the stub shaft 17 are positioned relative to each other as
is shown in Figures 14 and 15. After the pressing measure, the wedge element 16 and
stub shaft 17 are positioned as shown in Figures 16 and 17. As is apparent from Figures
14-17, when the wedge element 16 is pressed over the stub shaft 17, the guiding surface
16 on the wedge element causes the wedge element to be moved to the left as viewed
in the Figures. As a consequence, the bolt lever element 8 and the dead bolt 7 are
also moved to the left in the Figures, pressed by the wedge element 16. Thus the dead
bolt 7 is moved towards the bolt opening in the front plate 11 somewhat inside the
opening. In this position, the dead bolt 7 is additionally under guidance of the guiding
surfaces 2d on the body element, cf. Figure 16. Due to this arrangement the dead bolt
7 and the bolt lever element 8 can be moulded so as to be positioned in inner positions
relative to their operating position so that they can be installed in the lock housing
10 as a stationary part of the moulding 1.
[0025] Figure 18 shows the lock casing 9 of Figure 16 in a situation in which the latch
bolt 3 is in its normal protruding position pressed by the spring 4 and the dead bolt
7 is also in its protruding position and dead-locked, effected by the bolt lever element
8. In this arrangement reciprocating movements of the dead bolt 7 are provided through
the bolt lever element 8, turning of which is achieved by means of a key (not shown)
insertable through a key hole 18 arranged in the lock housing 10. Dead-locking of
the dead bolt 7 is achieved by means of two cams in the bolt lever element 8. A partition
wall 19 separates the dead bolt part and the latch bolt part of the body element 2
from each other and is dimensioned so as to be flexible. The flexible nature of the
partition wall 19, together with suitably designed guiding surfaces 8a and 8b on the
bolt lever element 8, keep the bolt lever element 8 in its position depending on the
operating position in each case.
[0026] From the viewpoint of assembly it is naturally more simple for the whole operating
device part to be formed of a single moulding or casting as described above. In principle,
when desired, even the whole lock casing may be moulded in one or several pieces by
injection moulding of plastics material, when only the selection of the materials
corresponds to the requirements set by the operating conditions, for instance requirements
for strength. On the other hand, when necessary, the lock casing may also comprise
only one bolt part, i.e. the latch bolt part or the dead bolt part.
[0027] The lock body element, the operating devices and the connection members may be designed,
when necessary, in many different ways as regards their details. The installation
of the lock parts and arranging the lock to be put in an operable condition should,
however, be achieved with as few measures as possible. In practice, when desired,
a part of the connection members may be arranged to be broken for detaching of the
parts after installation by utilizing separate measures in order to provide for the
lock to be operable. In other words all the connection members need not necessarily
be broken already when the piece of casting is installed to its place in the lock
housing. There is also a matter of choice as to on which side of the body element
the different operating devices are moulded, how many planes are involved with the
moulding and to which extent the pieces are located inside each other and/or relative
to the body element.
[0028] Thus, the invention is not limited to the embodiment shown, but several modifications
are feasible within the scope of the accompanying claims.
1. A method of manufacturing operating devices for a lock and arranging the operating
devices in operating positions, the operating devices including at least one bolt
member and a turnable displacement device for the bolt member, characterised in that
the method comprises forming a plastics moulding having a body element (2), the parts
of which jointly define a basic plane, with said operating devices being connected
to the body element by breakable connection members or connection points (A - J),
in that at least some of the operating devices are moulded so as to occupy at least
one separate plane relative to the basic plane of the body element, and in that in
order to arrange the operating devices in their operating positions the moulding is
pressed to break said connection members or connection points (A - J) and to move
the operating devices so that they occupy said same basic plane with the body element
(2).
2. A method according to claim 1, characterised in that said moulding is cast in a mould
by injection moulding of said plastics material.
3. A method according to claim 1 or 2, characterised in that the body element (2) and
the operating devices are manufactured to be of at least substantially of the same
thickness in a direction normal to said basic plane.
4. A method according to claim 1, 2 or 3, characterised in that the body element (2)
comprises a substantially uniform frame structure including at least one bolt opening
(2a, 2b).
5. A method according to any one of the preceding claims, characterised in that the operating
devices include at least one spring member and in that the operating devices are moulded
so as to be located on either side of the body element (2) .
6. A method according to claim 5, characterised in that said at least one bolt member
comprises a latch bolt (3), in that the operating devices further include a follower
(5), the latch bolt (3) and the follower (5) being arranged in the moulding (1) on
the same side of the body element (2), and in that said at least one spring member
comprises a return spring (4) for the latch bolt which in the moulding (1) is arranged
on the side of the body element (2) opposite to that of the latch bolt (3) and the
follower (5).
7. A method according to claim 6, characterised in that a follower spring (6) for the
follower is moulded as part of the body element (2).
8. A method according to claim 6 or 7, characterised in that said at least one bolt member
comprises a dead bolt (7) and in that the moulding (1) further comprises a bolt lever
element (8), which is preferably key operated, and a partition wall (19) which separates
a latch bolt mechanism from a dead bolt mechanism.
9. A method according to claim 8, characterised in that the dead bolt (7) and the bolt
lever element (8) are moulded on different sides of the body element (2) in different
planes to said basic plane.
10. A method according to claim 8 or 9, characterised in that the partition wall (19)
is dimensioned to be flexible so that after installation it is able to guide the bolt
lever element (8).
11. A method according to any one of the preceding claims, characterised in that the moulding
(1) is installed in a separate lock casing, which includes a front plate (11) and
a lock housing (10) fixed thereto, and in that said pressing step is accomplished
directly against the lock housing (10) so that the body element (2) and the operating
devices remain inside the lock housing (10).
12. A method according to any one of the preceding claims, characterised in that the operating
devices and said connection members or connection points (A - J) are so located in
the moulding (1) that when the operating devices are broken from the body element
in the pressing step they are arranged relative to each other in their correct positions
required for their operation.
13. A method according to any one of claims 6 to 10, or claims 11 or 12 when dependent
on any one of claims 6 to 10, characterised in that at least one guiding member (15)
is moulded to the body element (2), the guiding member(s) with the spring (6) for
the follower guiding the follower (5) into a correct position when the follower (5)
is turned for the first time after the pressing step.
14. A method according to any one of claims 6 to 10 or 13, or claim 11 or 12 when dependent
on any one of claims 6 to 10, characterised in that the follower has a guiding surface
(5a) which, when the follower (5) is turned, guides, together with guiding surfaces
(14) of the body element, the spring (4) for the latch bolt into a correct position
and to a prestressed operating position, whereby the spring (4) for the latch bolt
presses the latch bolt (3) towards its operating position(s).
15. A method according to claim 11 when dependent on any one of claims 8 to 10, or any
one of claims 12 to 14 each when dependent on claim 11 and any one of claims 8 to
10, characterised in that said lock housing (10) is provided with a stub shaft (17),
and in that the moulding includes a wedge element (16) which at the pressing step,
under the influence of said stub shaft (17), guides the bolt lever element (8) in
the direction of the movement according to the bolt operation of the dead bolt (7)
towards the dead bolt (7) simultaneously pressing the dead bolt (7) into its operating
position in which it extends beyond the inner edge of its bolt opening in the lock
casing.
16. An operating device mechanism intended for a lock casing (9), the operating devices
of the mechanism including at least one bolt member, a displacing device for the bolt
member and at least one spring member, characterised in that the operating device
mechanism further comprises a one piece injection moulding (1) of plastics material
which includes a body element (2) to which the operating devices are connected by
breakable connections (A - J) and which is located in a basic plane, and in that at
least some of the operating devices are located in at least one separate plane which
is spaced from and parallel to the basic plane.
17. An operating device mechanism according to claim! 16, characterised in that the body
element (2) and the operating devices are at least substantially of the same thickness.
18. An operating device mechanism according to claim 16 or 17, characterised in that the
body element (2) comprises a substantially uniform frame structure which includes
at least one bolt opening (2a, 2b) and bolt guiding surfaces (2c, 2d) .
19. An operating device mechanism according to any one of claims 16 to 18, characterised
in that the operating devices are located in at least two separate planes positioned
on opposite sides of, and parallel to, said basic plane.
20. An operating mechanism according to claim 19, characterised in that the at least one
bolt member comprises a latch bolt (3), in that the operating devices further include
a follower (5) arranged on the same side of the body element (2) as the latch bolt
(3), and in that said spring member is a return spring (4) for the latch bolt which
is located on the opposite side of the body element (2) to that of the latch bolt
(3) and the follower (5).
21. An operating device mechanism according to claim 20, characterised in that a spring
(6) for the follower (5) is part of the body element 12).
22. An operating device mechanism according to any one of the claims 16 to 21, characterised
in that said at least one bolt member comprises a dead bolt (7), in that the operating
devices include a preferably key operated bolt lever element (8) for the dead bolt
(7) and in that the body element (2) comprises a partition wall (19) separating a
latch bolt mechanism from a dead bolt mechanism.
23. An operating device mechanism according to claim 22, characterised in that the dead
bolt (7) and the bolt lever element (8) are located in different ones of said separate
planes.
24. An operating device mechanism according to claim 22 or 23, characterised in that it
includes a wedge element (16), preferably supported against the bolt lever element
(8), and which, when the operating device mechanism is installed to be in operating
condition, is arranged to guide the bolt lever element (8), and in that the wedge
element (16) and the bolt lever element (8) are located in different ones of said
separate planes.
25. A lock for a door or the like including a lock casing having a front plate (11) and
a lock housing (10) fixed to the front plate and an operating device mechanism installed
in the lock housing (10), characterised in that the operating device mechanism includes
a body element (2) comprising a substantially uniform frame with at least one bolt
opening (2a, 2b) and, inside the frame, at least one bolt and displacing means for
the bolt, and in that the operating device mechanism is manufactured of plastics material.
26. A lock according to claim 25, characterised in that the parts of the operating device
mechanism are at least substantially of the same thickness and correspond to the thickness
of the inner space of the lock housing (10).
27. A lock according to claim 25 or 26, characterised in that the body element (2) has
guiding surfaces (2c, 2d) for guiding reciprocating displacing movements of the bolt.
28. A lock according to any one of claims 25 to 27, characterised in that the bolt is
a latch bolt (3) and in that the displacing means for the bolt include a follower
(5) and a spring (4) for the latch bolt.
29. A lock according to any one of claims 25 to 28, characterised in that it includes
a follower spring (6) for the follower formed as part of the body element (2), and
in that the body element (2) is additionally provided with at least one guiding member
(15) which, together with the follower spring (6), keeps the follower (5) in a correct
position required by the installation of the body element (2).
30. A lock according to any one of claims 25 to 29, characterised in that the body element
(2) is provided with a guiding cam (14) which, together with a guiding surface (5b)
of the follower, keeps the spring (4) for the latch bolt prestressed in its place.
31. A lock according to any one of claims 25 to 30, characterised in that the operating
device mechanism also includes a dead bolt (7) and a, preferably key operated, bolt
lever element (8) for operating the dead bolt and in that the body element (2) comprises
a partition wall (19) separating a latch bolt mechanism from a dead bolt mechanism
and which is dimensioned to be flexible to enable it to guide the bolt lever element
(8).
32. A lock according to claim 30 when dependent directly or indirectly on claim 28, characterised
in that the lock housing (10) is provided with a stub shaft (17), to which the bolt
lever element (8) is turnably journalled by means of a separate wedge element (16),
and a guiding opening (10a), to which the follower (5) is turnably supported.