JPH0451628B2 - - Google Patents

Description

Claim 1: A lift-and-lower window assembly, the window assembly having a perimeter frame assembly, the perimeter frame assembly comprising a head rail, a vertically slidable upper sash, and a raised upper sash. retaining means for clamping to the peripheral frame assembly in the lower or closed position; the window assembly having a vertically slidable lower sash; It has a releasable locking means for fixing, and when the upper sash and the lower sash are relatively displaced by a certain distance or more, the upper sash and the lower sash are engaged with each other, and the displacement of the upper sash is restricted. forming an engagement member on one or both of the upper sash and the lower sash, the window assembly applying a force sufficient to retain the lower sash in its selected open or raised position; a lower sash support device having an insufficient force to hold both the upper sash and the lower sash in the lifted position when the holding means releases the tightened state of the upper sash; When the holding means releases the tightened state of the upper sash, the upper sash and the lower sash are displaced downward against the force of the lower sash support device, regardless of the position of the lower sash, and the lower sash is displaced downwardly against the force of the lower sash support device. A lift-and-lower window assembly characterized in that a smoke ventilation opening is formed above the sash.

2. The upper sash includes a lower intermediate rail of the upper rail and two side frames, the head rail includes a rib facing downward, and the upper rail is located around the rib, and extends inside and outside the upper sash. 2. A lift-and-lower window assembly according to claim 1, further comprising a U-shaped positioning portion that restricts movement in the opposite direction.

3. The upper sash has a fusible connection that melts at a constant temperature, and the upper sash is attached to the upper sash such that when the fusible connection melts, the upper sash is released from the clamping state of the upper sash relative to the peripheral frame assembly. 2. A liftable window assembly as claimed in claim 1, wherein said window assembly is secured to said peripheral frame assembly via a welded connection.

4. The upper rail is provided with a flange extending in the horizontal direction adjacent to the upper head rail, and the flange is provided with an opening, and the fusible coupling body is brought into contact with the flange, and the fusible coupling body is brought into contact with the flange. inserting a screw through the body and securing the screw to the peripheral frame assembly through the opening;
A lift-and-lower window assembly according to claim 3.

5. The lift-and-lower window assembly according to claim 4, characterized in that a heat insulator is interposed between the fusible connector and the flange.

6. A lift-and-lower window assembly according to claim 1, wherein said lower sash support device comprises a counterweight.

7. A lift-and-lower window assembly according to claim 1, wherein said lower sash support device comprises spring means.

8. The lift-and-lower window assembly of claim 2, wherein the lower sash has an upper middle rail and a lower rail.

9. The engaging member is constituted by a flange,
the flange projects outwardly from the upper rail;
9. The lift-and-lower window assembly of claim 8, wherein the upper sash is located above the upper intermediate rail of the lower sash when the upper sash is in its lower position.

10 the lower sash support device is located between the peripheral frame assembly and the lower sash and is sufficient to hold the lower sash in any selected raised position, but not capable of supporting the combined weight of the upper and lower sashes; 2. A raised and lowered window frame assembly as claimed in claim 1, which produces an insufficient lifting force to lift the window frame assembly.

11. The locking means is constituted by a locking member and a locking rib, and the locking member is rotatably in contact with a groove in a handle portion integrally formed with the upper intermediate rail of the lower sash, 9. The raised and lowered window assembly of claim 8, wherein said latching rib is provided on said lower rail of said perimeter frame assembly.

12. The lift-and-lower window assembly according to claim 11, wherein a spring is provided between the handle portion and the hanging member.

Specification FIELD OF THE INVENTION The present invention relates to smoke ventilation systems.

In modern buildings, most buildings use synthetic products that produce large amounts of toxic fumes during combustion, so injuries or deaths from fires are due to inhalation of toxic fumes rather than the heat of the fire itself. caused by. For this reason, in the event of a fire, it is necessary to ventilate the building and ensure that toxic smoke is evacuated from the burning building so that people inside the building can get fresh air and escape from the burning building. It is desirable to provide a means to do so.

In the past, this was achieved in some buildings, especially those that were not fully air-conditioned, by hinged connections at the bottom of the panel to the frame and closure by fusible connections connecting the top of the panel to the frame. This has been done by providing a window panel mounted within a frame so that it can be held in place. Spring means are often provided to bias the panel into the open position, and struts are generally provided to limit the extent to which the panel can hinge. These supports are required because they are mounted close to the panels and balconies, where the rotatable panels could fall and injure people. Economically, the panels are in the form of transparent glass fixed panels and incorporated into framed modular units that can be integrated with sliding doors and other window or closing panels.

In the above installation condition, it is essential that no fastening means be provided to secure the panel in the closed position, since the panel must always be able to open in the event of a fire. For this reason, the panels with glazing must remain in the closed position and cannot be used for ventilation purposes to provide fresh air inside the building. Another drawback with the smoke ventilation system described above is that the frame is supported only at the top and bottom edges, leaving the restraints outwardly unsupported, so the frame structure of the panels should be relatively large and must comply with regulations. The point is that it must be able to withstand wind loads. As a result, the frame is relatively bulky;
This will spoil the appearance of the assembly. Due to the bulky construction, the installation of such windows is relatively expensive.

It is an object of the present invention to provide a smoke ventilation system which alleviates the drawbacks associated with prior art devices and which can be used reliably and efficiently. Other objects and advantages of the invention will become apparent hereinafter.

In view of the above and other objects, the present invention provides 1
In one embodiment, a peripheral frame assembly having a head rail and a fusible connection are secured to the peripheral frame assembly in a raised or closed position. a vertically slidable upper sash and a vertically slidable lower sash having releasable locking means for locking the lower sash in its lower or closed position, the upper sash being movable beyond the lower sash; an engagement member which is sufficient to hold the lower sash in a selected open or raised position upon disconnection of the fusible coupling, but which is sufficient to prevent the upper and lower sash from Therefore, when the lower sash is lifted and used, both sashes move to their lower positions, causing smoke to flow above them. and a lower sash support providing a ventilation opening.

In order that the invention may be better understood and put into practice, reference will now be made to the accompanying drawings, in which preferred embodiments of the invention are illustrated. Of the accompanying drawings, FIG. 1 is a front view of the liftable window assembly of the present invention in the closed position, FIG. 2 is a similar view of the window assembly in the smoke ventilation position, and FIG. FIG. 4 is a representative cross-sectional view along line 4--4 of FIG. 1; FIG. 5 is a modified implementation of the assembly shown in FIG. It is a schematic sectional view about an aspect.

As shown, a lift-and-lower window assembly 10 for smoke ventilation includes an upper sash 12 and a lower sash 13.
The peripheral frame assembly 11 supports a pair of vertically slidable sashes having vertically slidable sashes. The sashes slide in spaced vertical groove tracks 14 formed in the side rails 15 of the perimeter frame assembly.
Nylon guide insert 1 for easy sliding
6 is provided at the bottom of the track 14, the side frame 17 of the sash supports a bearing and sealing strip 18.

Intermediate rails 19 of the sash frame are constructed from conventional extrusions and, when in the closed position shown in FIG. It is provided with a tongue-like body 20 that increases the . The upper rail 21 of the upper sash 12 includes an inwardly extending flange 22 that is open at 23 to permit a screw 24 to pass therethrough into a head rail 25 of the perimeter frame assembly 11. Thus, the fusible link 26 can be supported under the flange 22 and the upper sash can be secured to the peripheral frame assembly 11. If desired,
The fusible connector can also be arranged to connect the side frame of the sash to the peripheral frame assembly 11. This is shown in FIG.

FIG. 5 is a schematic cross-sectional view of the assembly showing another location of the fusible connector connecting between the upper sash and the surrounding frame assembly. The fusible connector can be mounted as shown in FIG. 4, or, for example, as shown in FIG. Instead of fusible connections 26 and screws 24, fusible connections 8 and fasteners 9 may be used. Whichever location you choose, the connection between the top sash and frame will be broken by high temperatures or by a smoke detector using its output to break the connection.
You should know that it can be cut. This can be done by using the output of the smoke detector to heat a coil (not shown) embedded within the fusible coupling.

The upper rail 21 includes a U-shaped assembly locating portion 27 that surrounds the rib 28 of the head rail 25 of the frame assembly 11 and thus restricts inward and outward movement of the upper sash. The opening 23 provided in the flange 22 of the top rail has a screw 24
is large enough to allow said movement without interfering with the passage of the head of the head therethrough. In this way, allowing the top rail to move does not affect the release of the top sash when the fusible link 26 melts. A thermal insulator 29 may be inserted between the fusible link 26 and the window frame assembly to prevent the link 26 from melting due to increased temperature of the metal frame due to direct sunlight.

As shown in the figure, the rail of the sash frame is provided with an elongated groove-like recess for fixing a glass plate by a known method. The upper rail 21 further comprises an inwardly extending abutment flange 30 which rests on the middle rail 19 of the lower sash frame, so that the upper sash, when released, falls and the flange 30 hits the lower sash and also causes the lower sash to fall. When raised, this lower sash is guided into its fully closed position, leaving maximum open space 31 above the sashes 12 and 13 for smoke exhaust.

It is convenient to provide the lower rail 32 of the lower sash 13 with a handle portion 33 of equal width having a groove 34 formed along the lower side in order to rotatably attach the hooking member 42. This hanging member is attached to the frame assembly 1.
A slope locking rib 35 that fits with a reverse slope rib 36 provided on the lower rail 37 of No. 1 is provided on the lower side thereof. The latching member 42 is attached to the spring 3 as shown in FIG.
8 into its mated position. When the handle part 33 is grasped to lift it up, the latch member 4
2 automatically rotates to make the latching rib 35 freely,
The lower sash is therefore lifted to allow ventilation. For this purpose, a biasing tension spring 40 is provided in the track 14 in which the lower sash moves and connects a stop 41 mounted on the lower rail 32 and a suitable platform of the frame assembly 11. spring 40
The lifting action is sufficient to hold the lower sash 13 in any selected lifting position, but is not sufficient to hold the combined weight of the upper and lower sashes 12,13. Therefore, in the event of a fire, the fusible connection body 26 is separated and the upper sash is separated from the flange 30.
hits the middle rail 19 of the lower sash and descends by gravity until it leaves an opening for smoke ventilation above it. When the lower sash is lifted, the upper sash lowers until it mates with the lifted lower sash, so that the total weight of the upper and lower sash is equal to the spring 4.
It overcomes the biasing effect of 0 and moves to its lower position.
Both sashes then lower to the bottom of the frame assembly 11, leaving a completely open space above it approximately equal to the area of the upper sash.

As shown, frame assembly 11 and upper rail 2
1, between the intermediate rails 19, between the lower rail 32 and the lower rail 37 of the frame assembly, and the L-shaped frame member 4.
4 and the intermediate rail 19 of the lower sash 13 may be provided with a weatherproof sealing strip 43 extending between the intermediate rail 19 of the lower sash 13.

Of course, any known biasing or balancing means, such as counterweights or helical biasing means, may be used to maintain the lower sash in its raised position during normal use. The guide means for the sash can be an internal track, as shown, or an external rail adapted to cooperate with a groove in the sash frame. In the case of the window shown, the upper sash can be biased by gravity to the lowered position, but it can also be spring biased if desired. Stop means may be arranged on the lower rail of the lower sash to prevent the upper sash from moving further than the lower sash.

Modifications and variations to the illustrated embodiments that are obvious to those skilled in the art are considered to be within the broader scope of the invention as defined by the appended claims.