ES2201622T3 - CLUTCH CYLINDER LOCK. - Google Patents

Abstract

Cylinder lock of the clutch type, comprising a box (2), two coaxial cylinders (5) that can rotate inside said box (2) and are equipped with a key slot (6), pins (10) and complementary pins (11) that are arranged in said cylinders (5) and said box (2) and can be operated on them by means of the key (7) moving from a locked position to a position that allows the cylinders to rotate (5), a vane (14) which is rotatably supported between said cylinders (5) and can be coupled with said cylinders (5) by means of a coupling element (22) comprising two coaxial bushings (23) housed in seats opposite each other (20) of said cylinders (5) and provided with outer teeth (24) by means of which said bushings (5) are coupled with said cylinders (5) in their rotation and are axially sliding in order to engage in an opening (18) of the pallet (14) thereby allowing a rotating coupling c on it, two mushroom-shaped elements (28) provided with rods (29) that are guided against the action of an antagonistic spring (33) and plates (30) guided in said bushings (23), elements of wall (25) arranged at adjacent ends of said bushings (23), and, at opposite ends, internal rings (26) acting as stops of said plates (30), springs (32) being located between said plates (30) and said wall elements (25) that are adapted to press said plates (30) against said inner rings (26), characterized in that said stems (29) are telescopically guided inside each other against the action of said antagonist spring (33) located within them, said wall elements being constituted by walls (25) of said bushings (23) having holes (31) for the passage for said stems (29), and said rings being provided ( 26) of some recesses (34) that allow the ins eradication of said mushroom-shaped elements (28) in said bushings (23) such that said stems (29) pass through said holes (31) and said plates (30) butt against said rings (26).

Description

Clutch type cylinder lock.

The present invention relates to a lock cylinder of the so-called type of clutch that allows the insertion of a key on one side, even if another is found key inserted on the opposite side.

A clutch type cylinder lock comprises a coupling element that provides a swivel coupling between a cylinder and the pallet regardless of whether a second is present or not key in the lock on the opposite side with respect to the key that is introduced.

An example of a cylinder lock of the type of clutch is in the document EP-A-536 653.

One such coupling element has been checked. which is difficult to manufacture and assemble, since it is composed of a plurality of pieces, and their assembly can only be done With a special team.

The purpose of the present invention is provide a clutch type cylinder lock, equipped of a simplified structure coupling element that can assemble with greater simplicity than conventional ones, so It is less expensive to manufacture.

Within the scope of this purpose, an objective of the present invention is to provide a cylinder lock of the clutch type, comprising a box, two cylinders coaxial that can rotate inside said box and are equipped with a key slot, spikes and complementary spikes that are are arranged in said cylinders and said box and can act on them using the key moving from one position lock to a position that allows the rotation of the cylinders, a pallet that is rotatably supported between said cylinders and can coupling with said cylinders by means of a coupling element comprising two coaxial bushings housed in seats opposite each other of said cylinders and provided with outer teeth whereby said bushings are coupled with said cylinders in their turn and are axially sliding in order to engage in a pallet opening thereby allowing a rotating coupling with it, two mushroom-shaped elements endowed with stems that are guided against the action of a antagonist spring and guided plates in said bushings, some wall elements arranged at adjacent ends of said bushings, and, at opposite ends, internal rings that they act as stops of said plates, springs being arranged between said plates and said wall elements that are adapted to press said plates against said inner rings, characterized in that said stems are telescopically guided one inside the other against the action of said antagonist spring located within them, said elements being constituted wall by walls of said bushings that have some holes for the passage for said stems, and being provided said rings of recesses that allow the insertion of said mushroom-shaped elements in said bushings such that said stems pass through said holes and said plates They stop against these rings.

Other features and advantages of this invention will be clearly revealed by the following detailed description of a preferred embodiment of a cylinder lock according to the present invention, illustrated exclusively by way of non-limiting example in the drawings attachments, in which:

Figure 1 is a longitudinal section view of a cylinder lock with the keys removed;

Figure 2 is a view of the lock with a of the keys inserted on one side and arranged in the plane central lock;

Figure 3 is a view of the lock with a key inserted on one side and arranged in the central plane of the lock and a second key inserted on the opposite side and located coplanar with the first key;

Figure 4 is a view of the lock with a first key inserted on one side and turned with respect to the central plane and a second key inserted on the opposite side and coplanar with respect to the central plane;

Figure 5 is a longitudinal section view of the lock coupling element of Figures 1 to 4;

Figures 6 and 7 are views taken according to the addresses VI-VI and VII-VII of the Figure 5; and finally

Figure 8 is a sectional view, taken according to the transverse plane VIII-VIII of Figure 1.

Referring to the exposed figures, the numerical reference 1 indicates a composite cylinder lock conventionally of two identical parts A and B.

The following description is developed with reference to only one of the parts, and when it is necessary to distinguish the elements of one part or the other, the corresponding numerical references will be accompanied by the letter a or b , depending on whether the elements belong to the part A or part B, respectively.

The lock comprises a box that is composed of two tubular bodies 2 that are coaxial and are they are joined by an elongated body as a bridge 3, the which presents in a middle position, a recess 4 that separates the tubular bodies 2.

Two cylinders 5 can rotate within the tubular bodies 2 and are provided with an axial groove 6 which allows the insertion of the key 7. The numerical references 8 and 9 designate the holes for housing the pins 10, the complementary pins 11 and the springs 12 that form conventionally the guards for blocking the rotation of the cylinders when the key is not inserted or stops allow the turn when it is introduced. The extremes opposite of the cylinders 5 protrude into the recess 4. About rings 13 recessed around said ends axially fix the cylinders but allow rotation.

The lock pallet 14 is mounted rotating at opposite ends of cylinders 5. The blade 14 comprises a ring 15 from which a radial lug 16 protrudes adapted to pass through recess 4.

On the opposite sides of the ring 15 are formed cylindrical seats 17, inside which the adjacent ends of cylinders 5; those seats are separated by a dividing wall through which a circular opening 18. On the wall surrounding the opening 18, find a slot 19 (see Figure 8) that is displaced angularly with respect to the central plane P of the lock.

The opening 18 is aligned with the seats cylindrical 20, of equal diameter, which are formed at the ends of the cylinders opposite each other. Seats 20 also feature slots 21 whose cross section is equal to the section transverse of the groove 19.

In the seats 20 of the cylinders 5 a coupling element designated in general by the reference Numeric 22, which passes through opening 18.

The element 22 is formed by two bushings cylindrical 23, 23a, 23b (see Figure 5) of equal length, or slightly lower, than the seats 20 inside which are guided; the bushings are fitted externally with teeth respective axial 24 adjusting sliders in slots 21, in such a way that the bushings are coupled in their turn but they can move axially in the seats 20.

The bushes 23 have, at their ends adjacent, some walls 25 and at their mutually opposite ends inner rings 26; said rings form flanges 27.

The bushes 23 house some shaped elements of mushroom 28 which are constituted by a tubular rod 29 and a plate 30.

The tubular stems 29 are guided within some holes 31 existing in the walls 25, while the plates 30 are guided inside the bushings 23.

Between the walls 25 and the plates 30 is interpose some springs 32 that keep the plates seated against the flanges 27.

Stems 29 are telescopically guided one inside the other, and inside these stems is housed a spring 33 of less elastic force than springs 32.

To allow the introduction of the elements in mushroom shape 28 inside the bushings 23, the part is removed of the rings 26 which overlaps the cylindrical wall of the bushings 23, thereby forming a recess 34 open towards outside.

The recess 34 and the holes 31 existing in the walls 25 have dimensions large enough to allow the inclined position of the stems 29 in the holes 31 and the plates 30 inside the bushings, such as It is indicated, in dashed lines, in Figure 5.

Once the plates 30 have been inserted into the bushes 23 and straightened inside, the springs 32 block the mushroom-shaped elements, pressing the plates 30 against the rings 26. Conveniently, plates 30 have their parts 35 conical-shaped centrals protruding in the opposite direction with respect to the stems and against which the end of the key 7 passing through the recess 34, as It will be clearly stated below.

The coupling described above works from the following form.

When the key is removed, the spikes complementary 11 are introduced in the holes 8 of the cylinders 5, blocking your turn. The recesses 34 are oriented so that allow the entry of the key 7 into the slot 6 and the teeth 24 are angularly offset with respect to the plane central P (see Figure 8).

By inserting the key 7a through the slot 6a of the cylinder 5a, the bushing 23a is partially inserted into the opening 18 of the pin 14, while the bushing 23b is pushed out of the opening 18 and inserted into the seat 20b of cylinder 5b (see Figure 2).

Under these conditions, the cylinder 5a is associated in its turn with pin 14 through bushing 23a by means of tooth 24a, which is partly inserted in the slot 21a of the seat 20a and partly in the slot 19 of the pallet. Under these conditions, since the bushing 23a is completely outside the opening 18, it is possible to turn the key and therefore The pallet

If key 7a is now left inside the slot 6a in the position where the pins 10 are aligned with the complementary pins 11 (that is, coplanar with the plane P) and a second key 7b is inserted into cylinder 5b (see Figure 3), as the spring 32b is more rigid than the spring 33, the push of the key 7b on the plate 30b displaces the bushing 23b towards the pallet by introducing it into the opening 18, which provides a swivel coupling with the pallet thanks to the insertion of the tooth 24b in the groove 19.

If, on the contrary, the key 7a that is left in channel 6a is rotated, that is, angularly displaced with with respect to plane P (see Figure 4), bushing 23b cannot engage directly with the opening 18 of the pallet, since the tooth 24b cannot enter slot 19. Under these conditions, by inserting the key 7b, the end thereof gives rise to the axial displacement of the plate 30b inside the bushing 23b and the compression of the spring 32b, which allows, consequently, to place the contact points of the pins 8 and the pins complementary 11 in the plane of rotation of the cylinder seat 5b

Under these conditions, the key 7b can penetrate totally inside the cylinder 5b being able to rotate the cylinder 5b until tooth 24b aligns with groove 19. Once achieved this alignment, the spring 32b that has been preloaded by the thrust of the plate 30b moves the bushing 23b into opening 18, providing a coupling that allows rotation of the pallet.

If a key is not inserted in the cylinder 5a, the insertion of the bushing 23b is accompanied by the simultaneous ejection of bushing 23a from pallet 14 per action from pier 33, which keeps the bushings 23a, 23b spaced apart in the position in which the bushing 23a stops against the bottom from seat 20a.

From the above description it is clear that the fundamental characteristic of the coupling element 22 consists in which its assembly does not require additional components, such as elastic rings or similar parts, which are complicated to assemble and that require the formation of grooves or flanges of placement.

When the technical characteristics that mentioned in any of the claims are followed by signs of reference, such reference signs have been included with the exclusive object of increasing the intelligibility of claims and, consequently, such reference signs do not have any limiting effect on the interpretation of each of the elements that are identified by way of example by Such reference signs.

Claims (3)

1. Cylinder lock of the clutch type, comprising a box (2), two coaxial cylinders (5) that can rotate inside said box (2) and are equipped with a key slot (6), pins (10 ) and complementary pins (11) that are arranged in said cylinders (5) and said box (2) and can be operated on them by means of the key (7) passing from a locked position to a position that allows the rotation of the cylinders (5), a vane (14) which is rotatably supported between said cylinders (5) and can be coupled with said cylinders (5) by means of a coupling element (22) comprising two coaxial bushings (23) housed in opposite seats each other (20) of said cylinders (5) and provided with outer teeth (24) by means of which said bushings (5) are coupled with said cylinders (5) in their rotation and are axially sliding in order to engage in an opening ( 18) of the pallet (14) thereby allowing a giratori coupling or with it, two mushroom-shaped elements (28) provided with stems (29) that are guided against the action of an antagonistic spring (33) and plates (30) guided in said bushings (23), elements of wall (25) arranged at adjacent ends of said bushings (23), and, at opposite ends, internal rings (26) acting as stops of said plates (30), springs (32) being located between said plates (30) and said wall elements (25) that are adapted to press said plates (30) against said internal rings (26), characterized in that said stems (29) are telescopically guided inside each other against the action of said spring antagonist (33) located within them, said wall elements being constituted by walls (25) of said bushings (23) having holes (31) for the passage for said stems (29), and said rings being provided (26) of recesses (34) that allow inserting said mushroom-shaped elements (28) into said bushings (23) such that said stems (29) pass through said holes (31) and said plates (30) butt against said rings (26). 2. Lock according to claim 1, characterized in that said recesses (34) are angularly offset with respect to said teeth (24). 3. Lock according to claim 1, characterized in that said plates (30) have a central part of conical shape (35) that engages with the key (7) through said recesses (34).