JPH02225781A - Bolt lock with spring clutch having emergency release device - Google Patents

Abstract

PURPOSE: To quickly release a bolt by forming a bolt lock with spring clutch so that a claw pivotally fitted to the bolt and for releasing the bolt is turned when a release lever is turned by a spring clutch opening element. CONSTITUTION: When a handle is turned clockwise, a spring clutch 5 of an opening element 16 is drawn back, and a lever 29 is turned around a support point 30. When the lever 29 rotates a claw 31, the claw 31 pulls a bolt locking element 26 while compressing a spring 27. Continuously, the lever 29 pushes a wing part 26b of the bolt locking element 26 projected from a surface of a tank 23, and moves the element 26 and the bolt 6 to a release position so as to release the bolt 6. In the case where the bolt 6 is released by a key, a reset lever 36 works to the opening element 16 so as to open the spring clutch 5.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a bolt lock with a spring latch equipped with an emergency release device.

BACKGROUND OF THE INVENTION Door locks are generally known to have a spring latch that is opened by a suitable handle and a locking bolt that is actuated by a key. In some cases, for example in hotels, it is advantageous to be able to quickly open the door from one side, ie without the use of a key, simply by means of the handle. This requirement obviously arises for safety reasons. This is because, while maintaining a locking function that prevents intrusion from the outside, it is necessary to be able to easily exit the room in particularly dangerous situations.

Therefore, locks have been devised with one-sided opening devices consisting of lever systems that open the bolt by the action of an internally arranged knob. In particular, said lever system:
Basically, it consists of a second lever that releases the bolt and a second lever that controls the opening operation of the bolt itself.

Furthermore, the lock is equipped with a safety device adapted to lock the spring latch in the closed position on the boat. The device is released by actuation of the handle or by actuation of the key which releases the bolt.

(Problem to be Solved by the Invention) Locks of the type described above are not without disadvantages. In particular, the spring latch safety device is unreliable and the bolt release and quick release device is structurally complex, which is a source of possible failure.

Furthermore, it is difficult to rotate the spring latch about its own axis while installing the lock. This rotation is required to adapt the lock to the other side of the door it engages.

The object of the invention is to provide a simplified and reliably functional means of
To provide a bolt lock with a spring latch capable of quickly opening a bolt by moving a spring latch operating handle.

It is also an object of the present invention to provide a bolt lock with a spring latch having a spring latch locking device that is simple in structure, safe and reliable in operation.

Another object of the present invention is to provide a bolt lock with a spring latch that allows the spring latch itself to be easily oriented in a certain direction.

These objects are achieved by the invention by means of a spring-latched bolt lock with an emergency release device as defined in the claims.

BRIEF DESCRIPTION OF THE DRAWINGS Further details of the invention will emerge from the detailed description of a preferred embodiment of a bolt lock with a spring latch with an emergency release device, which is illustrated by way of non-limiting example in the accompanying drawings.

1 to 3, 1 designates a box of a lock according to the invention, which is fitted into a recess 2 of a door 3. In FIGS. Said box l has a front plate 4 which closes the recess 2 and fixes the lock at the door 6 to the door.

The locks protrude from the box I through the plate 4 and are provided in each case with a seat 7. in the side post in the closed position.
It has a spring latch 5 and a bolt 6 adapted to engage 8. The seat 7.8 faces a corresponding hole formed in the plate 10 attached to the side post 9.

The spring latch 5 has a stem 11, on which is mounted a helical spring 12 for returning the spring latch.

At both ends, this spring I2 acts on an abutment 13 fixed to the box and a ring 14 fixed to the stem 11. A small plate 15 is fixed to the free end of the stem ti, and an opening element, generally designated 16, is adapted to act on said plate 15.

The spring latch 5 has a pivot 17 with a square hole.
It is adapted to be moved by a suitable handle (not shown) that engages with the handle. Opening element 16 is pivot 1
7 and is rotatable together with the handle.

The opening element 16 consists of a set of rings of various shapes fitted onto the pivot 17 next to each other. In particular, the matching rings include a pair of outer rings, designated 18, which are identical to each other, and an intermediate ring 19.

Each outer ring 18 has a projection forming a respective fork-like prong X8a, which embraces the stem 11 of the spring latch 5 so as to act on the plate 15 of said stem. In the closed position of the spring latch, the fork is held stationary on the fixed abutment 13.

Further, each outer ring 18 has an extended portion 18b.
, which is at an angle of approximately 90° to the prong 18a in the direction of opening rotation A of the handle. In FIG. 1, to illustrate the intermediate ring 9, the extension of the ring closer to the viewer! Only 8b is shown.

The extension 18b is adapted to act on a helical spring 20 for returning the handle, which spring 20 is fixed to the box I and is attached to the core abutment 2.
is stationary.

The bolt 6 is actuated by a known key device whose seat 22 is shown in the drawings. The bolt 6 has a prismatic tongue 23 which is slidably guided by engagement between a slot 24 of the tongue and a square pivot 25 fixed to the box 1. The bolt 6 is connected to the square pivot 25 and the locking element 26 supported by the bolt. is adapted to be locked in the closed position by engagement with the teeth 26a of. The element 26 is biased by a spring 27 acting on its wings 26b and is adapted to be released by the key release device and the release element 16. It should be noted that the element 26 is guided in a direction transverse to the tongue 23, with its teeth 26c and wings 26b meshing in corresponding slots of the tongue.

The lock is provided with a device for quick release and opening of the bolt, indicated generally at 28. The device has an opening lever 29, which has a fulcrum 30 fixed to the box 1 and is pivotable by the opening element 16 of the spring latch by associated handle means. For this purpose, each outer ring 18 of the element 16 is
Each has a tooth 1.8c adapted to act on the flap 29a of the corresponding lever.

The lever 29 has a lug 29b at a central position that engages with a pawl 31 for releasing the bolt 6. This nail 3
1 is a toothed portion 3 that is pivotally attached to the bolt tongue 23 at a pivot 32 and formed with an undercut so as to act against the spring 27! a/ It is thus adapted to mesh with the wings 26b of the locking element 26.

The pawl 31 normally rests with its front edge 33 on the lug 29b. The bolt tongue 23 is further
A return lever 36 is provided with a pivot 34 slidable in a slot 35 formed at one end thereof. The return lever 36 is joined at its other end 37 to a wing "9a" of the intermediate ring 19 of the opening element 16.

Both ends of the spring 38 wound around the pivot 17 of the handle are connected to the outer ring 18 of the element 16, respectively.
The toothed portion 18c of the intermediate ring 19 is engaged with the wing portion 19a of the intermediate ring 19.

Therefore, when the handle is rotated in the direction indicated by arrow A, the spring latch 5 is retracted and the lever 29 is moved from the fulcrum 3.
0 and the bolt 6 is released. In the first stage of rotation, the release lever 29 releases the bolt. That is, as a result of the lever 29 actually rotating the pawl 31,
The pawl 3[ pulls up the bolt locking element 26 while compressing the spring 27.

Also, in the second stage of said rotation, the lever 29 at its lower end has an element 2 conveniently projecting from the surface of the tongue 23.
Push the wing part 26b of 6, and remove the element 26 and bolt 6.
While moving the bolt to the open position (rightward in Figure 1), tighten the bolt 6.
to open. In summary, the action of a knob conveniently located on the side of the door facing the inside of the room immediately opens the door, even when the bolt is locked.

In the opposite direction, the force of the spring 20 returns the handle.

The return lever 36 has the important function of acting on the opening element 16 and opening the spring latch 5 if the bolt is released by means of a key. This obviously allows the door not to be fitted with a handle on the outside so that it can only be opened with a key.

The lock is indicated generally at 39 and has a safety device adapted to lock the spring latch. This safety device 39 is hingedly supported at a fulcrum 41 on the box l, and has a locking lever 40 that prevents the spring latch 5 from moving.

The locking lever 40 is adapted to be pivoted by the spring latch release element 16. For this purpose, the intermediate ring 19 of the element 16 has a shoulder 19b which engages the lug 40a of the lever 40.

The engagement between the shoulder portion 19b and the lever 40 is ensured by a spring 42 that is fitted into the fulcrum 41 and that has both ends engaged with the fixed abutment I3 and the flap 40b of the lever. The ring 19 furthermore has an extension 19c, which is arranged between the prongs 18a of each outer ring 18 of the element i6 and is adapted to act on the plate I5. The ring 19 further has a tab 1.9d
, which is folded downwards in the figure and rigidly connects the intermediate ring I9 to the outer ring 18 when the element 16 is rotated by the handle.

The locking lever 40 is controlled by an element 43 for detecting the closing of the door 9, which element, like the spring latch 5, is rounded and beveled at the front. The sensor 43 is movable in the axial direction by the force of a spring 44 guided by a seat 43a provided inside the sensor 43.
is acting against the fixed abutment 45. sensor 4
3 projects from the box 1 through the plate 4 and in the closed position of the door it is attached to the front plate 10 of the jamb.
It is designed to retract when it comes in contact with. sensor 43
is guided by plate 4 and abutment 45 during movement.

A transmission lever 47 is joined at 46 to the sensor element 43 and is adapted to release the locking lever 40 in the open state of the door. This transmission lever 47 contacts the inner wing part 48 of the box l at the center, and the spring 47 of the flap 40b of the locking lever 40 at the tip.
It engages with the opposite side.

The locking lever 40 prevents movement of the spring latch 5 when the door is closed, but the opening element 1
Rotation of 6 in the incoming direction results in an ineffective position. When the door is opened, the spring 44 causes the sensor 43 to move outward and the locking lever 40 is held in a position where it does not prevent the spring latch 5 from sliding freely.

The lock further includes a spring latch orientation device indicated generally by the reference numeral 49. This orientation device is mounted on the rear wall 1a of the box l facing the spring latch 5, and has a slider element 5 that is vertically slidable in the figure.
It has 0.

This slider 50 has a bibobutte 51 fixed thereto.
is guided in a slot 52 in the box and is adapted to be moved by teeth 53 from outside the box.

The slider 50 has a hole 54 adapted to be centered on the stem l of the spring latch to permit axial rotation of the spring latch. For this purpose, the slider 50 is movable between said central and eccentric positions of the hole 54, which positions are defined by a pair of notches 55 on the eradication slider and a box opposite the front plate 4. This is determined by engagement with a protrusion 56 formed on the rear wall la.

A slider 50 is placed at the central position between the stem 11 and the hole 54.
By moving the spring latch 5 inside the box L, the stem! The end of the l can be inserted into said hole. Therefore, the spring latch can be rotated about its axis through the hole 57 provided in the box.

Instead, when the slider 50 is in an eccentric position, i.e. in normal use of the lock, the slider 50
acts as a stop element that prevents the axial sliding of stem II and prevents the spring latch from being accidentally pulled out of its seat.

The real advantage of the invention lies in the fact that each element, by virtue of its arrangement, leaves large areas free in the walls delimiting the sides of the box l. This allows a hole to be provided in said area into which a through screw can be screwed, said screw being able to be threaded through the thickness of the door to hold the base of the handle.

In a practical embodiment of the invention, the materials used, as well as the geometry, are arbitrary depending on the requirements.

[Brief explanation of the drawing]

1 is a longitudinal sectional view of the lock according to the invention in the closed state, FIG. 2 is a detailed sectional view of the spring latch orientation device along the plane H of FIG. 1, and FIG. 3 is a portion of said spring latch orientation device. It is a cross-sectional front view. Patent applicant Ichiji Costolzio Italiane Serratule Affini Chi Esse a Societa Bel Agioni Representative Patent attorney Aoyama Baka 1 person Figure 1 Figure 2

Claims (10)

[Claims] (1) a spring latch (5) movable into an open position against a spring means (12) and an opening element (16) for said spring latch actuated by a handle and adapted to be closed by a key device; a bolt lock with a spring latch, comprising a bolt (6) with a spring latch, a release lever (29) pivotably mounted on the box (1) of the lock and rotatable by the spring latch release element (16); a pawl (31) for the release of the bolt (6), pivotally mounted on the spring latch release element (6) and adapted to be moved by the release lever (29) during the first phase of rotation of the lever; An emergency release device characterized in that it has a lever (36) for retracting a spring latch joined to (16) and actuated by a key device, and a device (28) for quick release and opening of the bolt, consisting of: Bolt lock with spring latch. (2) a spring latch (5) movable into an open position against a spring means (12) and an opening element (16) for said spring latch actuated by a handle and adapted to be closed by a key device; a spring latch locking lever (40) pivotably mounted on the box (1) of the lock and rotatable by the spring latch release element (16);
a door closure detection element (43) movable in the axial direction by the force of a spring means (44); Bolt lock with spring latch, characterized in that it has a transmission lever (47) adapted to release a locking lever (40), and a safety device (39) consisting of: (3) a spring latch (5) movable into an open position against a spring means (12) and an opening element (16) for said spring latch actuated by a handle and adapted to be closed by a key device; a bolt lock with a spring latch, which is slidably mounted on the bottom of the box (1) of the lock facing the spring latch, and in an eccentric position with respect to the stem (11) of said spring latch; Hole intended to be moved from to center position (
a slider element (50) with a spring latch (54), which in its central position allows for circular sliding of said stem until the spring latch is completely retracted inside the box of the lock, and which moves said spring according to the required direction; an emergency release device characterized in that it has a spring latch orientation device (49) adapted to allow rotation of the latch while preventing the spring latch from fully retracting into the box of the lock in the eccentric position; Bolt lock with spring latch. (4) said opening element (16) consists of a set of molded rings (18, 19) fitted against each other on the pivot (17) of said handle, said molded rings being connected to the stem (11) of said spring latch; said release lever (
Claim 1 characterized in that it comprises a set of outer rings (18) each formed with teeth (18c) adapted to act on a corresponding flap (29a) of the outer ring (29).
Bolt lock with spring latch with emergency release device as described. 5. An emergency according to claim 4, characterized in that each outer ring forms an extension (18b) adapted to act on the spring means (20) for return of the handle. Bolt lock with spring latch with release device. (6) in a first stage of rotation, said release lever (29) is adapted to rotate said pawl (31) to raise the bolt locking element (26) and release the bolt (6); In the second stage, the release lever (29)
Push the wing part (26b) of the locking element,
A bolt lock with a spring latch as claimed in claim 1, characterized in that the bolt is adapted to open by sliding the bolt linearly in the opening direction. (7) The lever (36) for retracting the spring latch is located at one end of the pivot (34) of the bolt (6).
) having a slot (35) that slidably engages with the
At the other end the middle ring (19) of said open element (16)
), the one end being able to engage with the key device;
5. A bolt lock with a spring latch equipped with an emergency release device according to claim 4, wherein the spring latch is opened when the bolt is in the retracted position. (8) The opening element (16) has an intermediate ring (19) interposed between the outer rings (18), and the intermediate ring (19) is connected to the locking lever (40).
) is adapted to engage the lug (40a) of the shoulder (
19b) A bolt lock with a spring latch provided with an emergency release device according to claims 2 and 4. (9) The transmission lever (47) contacts the internal wing part (48) of the lock box (1) at the center, and engages the flap (40b) of the locking lever (40) at its tip. A bolt lock with a spring latch equipped with an emergency release device according to claim 2. (10) The center position and eccentric position of the hole (54) are of a lock box facing a pair of notches (55) of the slider and a front plate (4) that allows passage of the spring latch (5). A bolt lock with a spring latch according to claim 3, characterized in that the bolt lock is formed by engaging with a projection (56) formed on the rear wall (1a).