CN1059011A

CN1059011A - Latch bolt assembly

Info

Publication number: CN1059011A
Application number: CN 91101055
Authority: CN
Inventors: 乔治·F·淘乐多
Original assignee: Thomas Industries Inc
Current assignee: Thomas Industries Inc
Priority date: 1990-08-14
Filing date: 1991-02-20
Publication date: 1992-02-26
Also published as: CA2033762A1; EP0471112A1

Abstract

A kind of latch bolt assembly comprises a block piece, and this block piece is remained on non-blocking position and be forced to enter blocking position when fusible member melts by fusible member.In an embodiment of the present invention, block piece turns the position of the part of the handle mechanism that enters a joint latch bolt assembly, to prevent handle operation.In second embodiment of the invention, block piece is packed in the latch bolt slidably, and when fusible member melted, latch bolt slidably prevented the position that latch bolt retreats to one.

Description

Latch bolt assembly

The present invention relates to latch bolt assembly, particularly under certain condition, as when catching fire, prevent the pin action, with a latch bolt assembly that prevents that the intensity of a fire from spreading when opening.

In the prior art, latch bolt mechanism is well-known.This mechanism is included in the latch bolt that slides or rotate in the door.This pin is driven by the handle mechanism that is installed in rotation on the door.

Latch bolt assembly with the block piece that prevents that when catching fire door is opened is known.United States Patent (USP) discloses a kind of latch bolt mechanism for No. 3705739.Wherein, have one to remain on the blocking pin of punctured position in the handle housing by meltable packing ring.When catching fire, meltable packing ring fusing will be extended in the latch bolt by spring driven blocking pin, prevent that it from retreating from the bump chamber.

United States Patent (USP) 3811717 discloses a kind of latch bolt mechanism.Wherein, latch bolt can slide in handle housing.Usually remain on the rotating plate of non-blocking position by meltable pin, when meltable pin melts, move to the blocking position that is meshed with latch bolt.The end of barrier plate and latch bolt engagement.

United States Patent (USP) RE30263 discloses a latch mechanism.Wherein, a rotating lock latch parts that is loaded on the door has a spring driven inserted link, and this inserted link remains on a punctured position by fusible plug.When catching fire, the fusible plug fusing, inserted link is forced to enter a recess of latch mechanism housing, retreats in latch mechanism to prevent lock latch parts.

United States Patent (USP) 4007954 discloses a kind of latch bolt mechanism.Wherein, a rotating plate that usually remains on non-blocking position by meltable pin can produce the whereabouts under action of gravity, arrive such position, that is, and and the starting bar that the engaged at end one of this plate is extended between handle and latch bolt.

United States Patent (USP) 4003593 discloses a kind of latch bolt mechanism.Wherein, a spring driven pin that stops is maintained in the housing a recessed position and is lower than handle.When one keeps the pin fusing, above-mentionedly stop that pin can move up and engages to prevent that handle from moving with handle mechanism.

The invention provides a kind of latch bolt assembly.Wherein, latch bolt can slide in housing.Leader mechanism is used for handling the slip of latch bolt.Usually engage with a block piece when melting with the fusible member that holds it in non-blocking position when one, this block piece is moveable to a blocking position.One drive unit engages with block piece, makes when fusible member melts, and drives block piece and enters blocking position.

In certain embodiments of the present invention, above-mentioned block piece is a rotatable part.It is moveable to a blocking position and engages with the part of handle.One spring is used for driving block piece and enters blocking position.Handle mechanism is installed in rotation on the installing plate, and fusible member extends between block piece and installing plate.In case will turning to, fusible member fusing, block piece stop the further position of motion of handle.But, but still freely-movable of latch bolt, even after block piece moves to blocking position.Like this, the handle at the door opposite side can be used to door is opened.

In second embodiment of the invention, block piece is slidably mounted in the latch bolt.In case the fusing of the fusible member of desirable pin shape, block piece just moves on the glide direction perpendicular to latch bolt.One helical spring is used for driving block piece and moves stopping on the direction.Best, block piece is packed in the obstruction that is located on the latch bolt, and fusible member extends at block piece with between stopping up.The housing that comprises latch bolt has the hole of its sidewall of perforation.When fusible member melted, block piece moved to such position, promptly passed this hole to stop latch bolt, that is to say, prevented that latch bolt from retreating.

Fig. 1 is the main body figure that adopts the door latch mechanism of the principle of the invention;

Fig. 2 is mounted in the lateral view of the latch bolt on the door;

Fig. 3 is the lateral view of the amplification of latch bolt, wherein cuts open a part of housing, to expose its inside;

Fig. 4 is the latch bolt sectional view along IV among Fig. 3-IV line intercepting;

Fig. 5 is the lateral view that shows the handle mechanism of second embodiment of the invention;

Fig. 6 is the elevation that the part of embodiment is cutd open among Fig. 5;

Fig. 7 is the phantom along VII among Fig. 6-VII line intercepting.

Represented a latch bolt assembly of generally representing that is installed on the door 12 among Fig. 1 with label 10.This latch bolt assembly 10 comprises that one can be at housing 16(Fig. 2 to 4) in the latch bolt 14 that slides.The housing 16 of latch bolt, is fixed on the door 12 as screw by plate 18 and suitable securing member 20.

Handle mechanism 22 is used for handling the slip of latch bolt 16.One installing plate 24(Fig. 5 to 7),, is fixed on the surface 26 of door 12 as screw 28 by suitable securing member 28.Installing plate 24 has the wall 30 of pair of upstanding, in order to accept to pass the rotational pin 32 of handle mechanism 22.Like this, handle mechanism just is pivotally mounted on the installing plate 24.Then, cover plate 33 is installed on the installing plate 24, to cover the operation part of latch bolt assembly.

Handle mechanism 22 comprises the jut 34 that stretches out from rotational pin 32, and this jut can engage with starting bar 36, starting bar 36 be installed in rotation on the perpendicular direction of the rotation installation direction of handle mechanism 22 on.The rotation of handle mechanism 22 can make starting bar 36 produce a rotation perpendicular with it.Starting bar 36 comprises a protruded arm 38, this arm can be bonded on the hole 40 of latch bolt housing 16 ' in, it can be engaged with the part of latch bolt, when handle operation, latch bolt is slided in complex way.

One drive unit 40 of getting the helical spring form is located in the latch bolt housing 16, and this spring withstands on by proper device, as crooked coupling part 44, is fixed on the cap 42 on the housing 16.The other end 46 of spring 40 withstands on by suitable fastener, as crooked coupling part 50, is fixed in the obstruction 48 on the latch bolt 14.The size that spring 40 is had should make it arrive from the position that door stretches out by Continuous Drive latch bolt.In this position, stopping up 40 should be able to be from the hole 40 of housing ' expose.The arm 38 of starting bar 36 will withstand the surface 52 of obstruction, overcoming the driving force of spring 40, and then make in latch bolt returns to.

The invention provides a kind ofly under hot conditions, as when catching fire, prevent the device that latch bolt assembly gets loose, in the first embodiment of the invention shown in Fig. 2 to 4, a block piece 60A is contained in the latch bolt 14 and by a fusible member 62A and remains on a non-blocking position.In this embodiment, block piece 60A is the pin in the hole 64 that is contained in the obstruction 48.The setting in pin 60A and hole 64 should make when fusible member 62A melts, and pin 60A is radially outwards moving surely, stretch into the hole 40 of housing 16 ' in.Fusible member 62A passes blocking pin 60A and is maintained at and stops up in 48.The drive unit 66A that gets the helical spring form is located in the hole 64.When fusible member 62A melted, it forced block piece 60A to enter an outstanding blocking position.When block piece 60A is in outstanding blocking position, because pin 60A further retreats conjugate foramen 40 ' sidewall 68 to prevent latch bolt 14, thereby in having prevented that latch bolt 14 from returning to.

The second embodiment of the present invention is represented by Fig. 5 to 7.Wherein, block piece 60B remains on non-blocking position by fusible member 62B.In this embodiment, block piece 60B one has the plate-like piece of the trunnion 70 that passes panel 72.When block piece 60B was in blocking position shown in Fig. 5 and Fig. 6 dotted line, panel 72 can engage with the jut 34 of handle mechanism 22.The drive unit 66B that gets form of springs is used for driving block piece and enters blocking position when fusible member 62B melts.In this example, fusible member 62B extends between block piece 60B and installing plate 24.Because have only handle mechanism 22 to be blocked in this example, but starting bar 36 and but freely-movable of latch bolt 14, even when block piece 60B is in blocking position.Like this, if only a device has been installed block piece, the handle mechanism that is in an opposite side still can be operated so that latch bolt mechanism is got loose.

Obviously, the present invention can have various remodeling and variation, and these remodeling and variation all should comprise within the scope of the following claims.

Claims

1, a kind of latch bolt assembly comprises a latch bolt that can slide in a housing; Leader's mechanism operating latch bolt slides; One rotating block piece is moveable to one and prevents the blocking position that handle mechanism moves; One fusible member that can engage with above-mentioned block piece, it remains on non-blocking position with this block piece; The drive unit that engages with block piece forwards block piece to blocking position when fusible member melts.

2, according to the latch bolt assembly of claim 1, wherein, rotating block piece comprises the plate-like piece with the rotational pin that passes a panel, and when block piece was in blocking position, above-mentioned panel engaged with handle mechanism.

3, according to the latch bolt assembly of claim 1, wherein, above-mentioned drive unit comprises a spring.

4, according to the latch bolt assembly of claim 1, wherein, handle mechanism is by rotating the slip of handling latch bolt.

5, according to the latch bolt assembly of claim 1, wherein, handle mechanism is installed in rotation on the installing plate, and fusible member then extends between block piece and installing plate.

6, according to the latch bolt assembly of claim 1, wherein, after block piece moves to blocking position, but still freely-movable of latch bolt.

7, a kind of latch bolt assembly comprises a latch bolt that can slide in a housing; Leader's mechanism operating latch bolt slides; One block piece that is loaded in the latch bolt is moveable to a blocking position, to stop the latch bolt motion; One fusible member can engage with block piece, block piece is remained on non-blocking position; The drive unit that engages with block piece makes block piece enter blocking position when fusible member melts.

8, according to the latch bolt assembly of claim 7, wherein, block piece is perpendicular to the glide direction motion of latch bolt.

9, according to the latch bolt assembly of claim 7, wherein, drive unit is a helical spring.

10, according to the latch bolt assembly of claim 7, wherein, block piece is located in the obstruction that is loaded in the latch bolt, and fusible member extends at block piece with between stopping up.

11, according to the latch bolt assembly of claim 7, wherein, housing has the hole of its sidewall of perforation, and block piece is moveable to and passes the position of this hole to implement to stop.

12, a kind of latch bolt assembly comprises a latch bolt that can slide in a housing, leader's mechanism operating latch bolt slides; One block piece comprises that one is moveable to blocking position and is moveable to blocking position to prevent the slidably block piece of latch bolt motion with the rotating block piece or that prevents handle mechanism motion; One fusible member can engage with block piece so that this block piece is remained on non-blocking position; Drive unit engages with block piece, forces block piece to enter blocking position when fusible member melts.

13, according to the latch bolt assembly of claim 12, wherein, drive unit comprises a spring.

14, according to the latch bolt assembly of claim 12, wherein, handle mechanism slides latch bolt by rotation.