JPS6341008Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a smoke-proof screen that can be rolled up freely and is lowered from the ceiling of a building in the event of a fire and used as a smoke-proof hanging wall.

[Prior Art] Smoke-proof hanging walls are provided on the ceilings of factories, buildings, underground passages, and other buildings for the purpose of preventing the spread of smoke in the event of a fire. During normal times, this smoke-proof hanging wall is stored raised to the ceiling, but in the event of a fire, it will drop more than 50 cm from the ceiling and protrude below the ceiling to form a wall. This prevents smoke from spreading along the ceiling surface throughout the building.

One type of smoke-proof hanging wall is a roll-up type smoke-proof hanging wall. This product has a winding shaft installed in a hollow storage case attached to the ceiling, and a thin steel smoke prevention plate is attached to the winding shaft in the rolled state.In the event of a fire, this thin steel smoke prevention plate It is designed to lower the smoke plate.

[Problems that the invention aims to solve] However, when installing a smoke-proof hanging wall made of thin steel plates like the one mentioned above on a floor with a large ceiling area, the installation width of the smoke-proof hanging wall also becomes large. , it becomes necessary to construct the smoke-proof panel itself with a wide one, e.g. 10m or 15m long. In particular, since smoke-proof panels are used to block smoke, there must be no gaps in the width direction, so long panels had to be used.

However, the longer the smoke prevention plate becomes, the heavier it becomes as it is also made of steel plate, and therefore, when installing the smoke prevention plate, a large vertical load is placed on the winding shaft. As a result, the winding shaft is bent, and there is a concern that wrinkles may occur in the smoke prevention plate. In addition, since the product is long, it takes a lot of time to manufacture, and it is also difficult to handle when transporting the product to the installation site.
Loading and unloading was difficult unless chain blocks were used. Furthermore, since the smoke-proof panel is long, it is difficult to attach it to the ceiling, and it has the disadvantage of poor workability.

[Means for solving the problems] The present invention eliminates the drawbacks of the above conventional type, and
This allows a smoke-proof hanging wall with a long installation width to be easily formed in a building with a large ceiling area.

In order to achieve the above object, the present invention has a plurality of short winding shafts arranged horizontally with the same height along the direction in which the smoke prevention screen is installed on the ceiling of a building, and at least one end of each winding shaft is When viewed from the front side, the front and rear winding shafts are arranged so as to overlap each other in an alternating manner, and a narrow width noncombustible sheet corresponding to each winding shaft is stretched, and the front and rear winding shafts are further rotated in opposite directions to form the narrow width. A biasing means is provided to constantly impart a winding tendency to the sheet, and the side edges of adjacent narrow sheets are substantially overlapped and brought into close contact with each other, and the lower ends of each narrow sheet are integrated through a common seat plate. Furthermore, the seat board winding wires hanging from the ceiling are branched, each of the branch wires is inserted between the side edges of the overlapping sheets, and one end of the wire is connected to the seat board. The other end of the wire is connected to a take-up shaft device with a release mechanism in the ceiling.

With this configuration, the present invention can effectively prevent the spread of smoke in the event of a fire. In addition, when the screen is transported to the site and installed, the present invention makes the noncombustible sheet itself and its winding shaft short, making it extremely easy to manufacture, transport, and store. Become. Further, a smoke prevention screen having any long installation width can be easily formed. Moreover, in this case, there is no disadvantage that the winding shaft is bent or the smoke screen is loosened or wrinkled.

[Example] Hereinafter, the configuration of the present invention will be specifically explained based on the drawings. Figure 1 shows a plurality of narrow sheets 1 made of noncombustible material such as glass cloth (in this example, three sheets of decorative glass cloth coated with a disaster prevention agent on the surface) are used to create adjacent narrow sheets. A skeletal front view of the screen of the present invention in which the side edges of the sheets are arranged in series so that they overlap, FIG. 12 is an exploded perspective view of the main parts, FIG. 3 is a side view, and FIG. 4 is a FIG. 3 is a detailed view showing an enlarged view of the main part. In the figure, reference numeral 2 denotes a ceiling surface of the building, and 3 denotes an elongated storage case arranged on the back side of the ceiling surface 2 along the installation direction of the smoke screen. Inside this case 3, a plurality of relatively short sheet winding shafts 4 are installed horizontally with the same height along the longitudinal direction of the case. Further, one end of each winding shaft is arranged so as to be alternately shifted so that the front and back overlap when viewed from the front side. The narrow noncombustible sheet 1 is suspended from each of these winding shafts 4. In this case, the front winding shaft and the rear winding shaft are interlocked with each other, for example, through reversing means using gears, so that adjacent narrow sheets 1 can be simultaneously wound up or rewound. It is pivoted by a support bracket 32 for rotation in opposite directions. These winding shafts 4 have a built-in winding mechanism (biasing means) 5 having a structure as described later in order to give the sheet 1 a tendency to wind up at all times (see FIG. 8).

By the way, the adjacent narrow sheets 1 are arranged so that there is no gap between the side edges of each sheet.
As shown in FIG. 2, the sheets 1 are arranged so that the side edges of each sheet 1 overlap and come into close contact with each other in the stretched state.

As clearly shown in FIGS. 1 to 4, in order to lower each narrow seat 1 from the ceiling by its own weight, a common seat plate 6 that acts as a weight is attached to the lower end of the seat. In this case, the lower side edges of the adjacent narrow seats 1 are brought into close contact with each other and held by a portion of the seat plate 6. The seat plate 6 is, for example, made of an aluminum profile formed into a rectangular cylindrical cross section as shown in FIG. It is interconnected with the sheet 1. Further, as shown in the same figure and FIG. 5, a seat plate hoisting wire 8 is fixed to the seat plate 6 via a set screw 9. In that case, the wires 8 are branched as shown in FIGS. 1 and 2, each of the branch wires is inserted between the side edges of the overlapping sheets, and the lower end of each wire 8 is connected to the seat plate 6. Pass it through the inside of and fix it with screw 9. Incidentally, reference numeral 10 is a metal fitting for adjusting the tension of the wire 8 inserted into the overlapping portion. A cover 11 covers the adjustment fitting 10 and is detachably attached to the seat plate 6.
Reference numeral 12 denotes a call wheel for the hoisting wire 8 disposed within the case 3 provided on the ceiling. The wire 8
is connected to a wire winding drum 13, which is also provided inside the case 3, via this call wheel. By the way,
Of the two left and right branch wires shown in FIGS. 1 and 2, the right wire has its upper end connected to the left wire via the connecting fitting 14, and the left wire is connected to the winding drum 13. When the wire is wound up, the wire on the right side is also wound up together.

As shown in FIG. 9, it is preferable to attach a stopper 15 to the wire 8 to restrict the running range of the wire during unwinding. 1
6 is a stopper receiver fixed to the case 3. 1
7 indicates guide rails provided on both sides of the screen.

Next, an example of a braking mechanism for the seat board hoisting wire 8 and a releasing mechanism for the wire will be explained.

As shown in FIG. 6, an operating shaft 19 having a hook 18 at its lower part for engaging a manual hoisting handle is provided so as to pass through the ceiling plate 2, and a brake wheel 20 is attached to its upper part. A clutch or the like (not shown) is installed between the brake wheel 20 and the operating shaft 19, so that the clutch allows the wheel 20 to rotate only in one direction around the operating shaft 19. . Reference numeral 21 denotes a bevel gear 22 attached to the upper end of the operating shaft 19.
is a transmission-side bevel gear that meshes with the bevel gear 21, and this bevel gear 22 is connected to the wire winding drum 13 via a transmission shaft 23.

By the way, as shown in FIG. 7, the brake arm 24 is positioned so as to be freely engageable and detachable from the brake wheel 20. As shown in FIG. That is, a brake arm 24 having a braking portion at its tip that engages with teeth of the brake wheel 20 is disposed so as to be slidable in a direction perpendicular to the brake wheel 20. code 2
Reference numeral 5 designates a brake arm operating rod, and this operating rod is provided with a spring so that the engagement between the brake wheel and the brake arm is released by the elasticity of the spring. 26 locks the operating rod 25 in place and locks the brake wheel 2.
0 and the brake arm 24. This pawl is operated by a solenoid 28 that is activated when it receives a fire signal from a smoke detection sensor, etc. When the operating rod 29 of the solenoid 28 presses one end of the pawl 26,
The pawl is configured to rotate about the pivot point 27 to release the operating rod 25 and release the engagement between the brake wheel and the brake arm.
Note that reference numeral 30 is a manually operated brake release grip, and when this grip is pulled, the holding pawl 27 is released.
and the operating rod 25 is disengaged.

Further, reference numeral 31 is a brake return grip, and when this is pulled, the brake arm 24 moves and the brake wheel 20 and the brake arm 24 are engaged again.

Proceeding to the winding mechanism 5 for the narrow sheet 1 according to FIG.
To explain the details, 32 in the figure is the winding shaft 4.
This is the supporting bracket. A cylindrical sheet winding shaft 4 is rotatably held on this bracket via a shaft 33 at the end of the shaft. 34 is the bearing of the winding shaft;
35 is a shaft guide fixed to the winding shaft 4. The mandrel 33 is fixedly attached to the support bracket 32. Further, one end of a coil spring 36 is fixed to this shaft, and the other end is fixed to the guide 36.
5 to the winding shaft 4 itself, so that the winding shaft 4 always has a tendency to rotate in one direction. In other words, the narrow sheet 1 wound around the winding shaft 4
is due to the hoisting mechanism 5 being installed.
When the sheet 1 is forcibly lowered against a constant winding tendency, the coil spring 36 is twisted by that amount, and the winding force is further increased.

Incidentally, in this device, the descending weight of the noncombustible sheet including the seat plate 6 is set to be greater than the hoisting force by the hoisting mechanism 5. When the narrow sheets 1 suspended from each winding shaft 4 are stretched, they hang vertically due to the weight of the seat plate, and at the same time, the side edges of adjacent sheets overlap each other with the winding wire 8 in between. No gaps are formed between the side edges.

[Function] Next, the function of this device will be explained. In normal times, the smoke screen made of a plurality of narrow sheets 1 is wound up on the sheet winding shaft 4 and stored in the case 3. At this time, the seat board winding wire 8 is also wound around the winding drum 13. That is, each sheet 1 in the rolled up state is
The sheet is housed in the case 3 by the winding force of the winding mechanism 5 incorporated in the sheet. Further, as shown in FIGS. 6 and 7, a brake device consisting of a brake wheel 20, a brake arm 24, etc. acts on the winding drum 13, and the seat plate 6
is stored and held in the opening of the case 3, that is, in the magsa. Once a fire occurs, the braking state of the winding drum 13 is released by a command signal from a smoke detector or the like or by manual operation. At this time, the winding drum 13 rotates and the wire 8 is allowed to travel freely, so that the wire 8 wound around the drum lowers each sheet 1 together due to the weight of the seat plate 6. start. That is, since the vertical load on the seat plate 6 is set to be larger than the winding force applied to the sheet winding shaft 4, when the braking state of the winding drum 13 is released, the sheet 1 is lowered to a predetermined height by the weight of the seat plate 6, and after descending, it maintains the hanging state as shown in FIG. In this case, the sheet winding force of the winding mechanism incorporated in the winding shaft 4 and the vertical load of the seat plate 6 act on the sheet 1 in opposite directions, so that each sheet is free from loosening. Since the sheets are hung in a completely taut state and no gaps are created between the side edges of the overlapping sheets, sufficient smoke-blocking properties are ensured.

When each sheet 1 that has been lowered is to be stored again in the case 3, the winding hook 18 is rotated using the winding handle, thereby winding up the wire winding drum 13. At this time, each of the narrow seats 1 is integrally connected by the seat plate 6, and the sheets 1 are always given a tendency to be rolled up by the action of the winding mechanism 5, so that they are integrated into one body. In this state, they move upward together and are stored on the back side of the ceiling board 2.

[Effects of the invention] As mentioned above, the present invention does not use a long smoke screen that is lowered from the ceiling by the weight of the seat board, but instead uses a plurality of narrow sheets connected in the width direction. Moreover, since the winding shaft of this sheet is made of a short product corresponding to the sheet, it is easy to manufacture, and not only is it convenient to transport to the site and handle during storage, but it is also easy to install in a building. Since both the sheet and the winding shaft are short products, a smoke screen having any long installation width can be easily formed.
Even when this long smoke-proof screen is formed, each winding shaft does not bend due to vertical loads. In addition, when the smoke screen itself descends to form a hanging wall, the weight of the seat plate acting as a weight and the winding force of the winding shaft act on the smoke screen, so the smoke screen Tension is applied and no slack occurs. Therefore, the side edges of each sheet overlap with each other without any gaps, so that sufficient smoke-blocking properties can be ensured. On the other hand, when the winding wire fixed to the seat plate is rolled up by the winding device, the winding shaft of the narrow sheet automatically rotates in the winding direction to wind up the smoke screen and return it to the ceiling. . In addition, according to the present invention, the narrow sheet and the winding shaft can be standardized, resulting in improved production efficiency and high mass production efficiency.

[Brief explanation of the drawing]

Figure 1 is a skeletal front view of the smoke prevention screen of the present invention, Figure 2 is an exploded perspective view of the main parts, Figure 3 is a side view of the same, and Figure 4 is an enlarged side view of the main parts. , Fig. 5 is a diagram showing the attachment relationship between the seat plate and the seat plate hoisting wire, Fig. 6 is a sectional view showing the braking mechanism of the seat plate hoisting wire, and Fig. 7 is a detailed view in the direction of arrow A in Fig. 6. ,
FIG. 8 is a sectional view of a sheet winding shaft incorporating a sheet winding mechanism, and FIG. 9 is a perspective view of a stopper that regulates the running range of the wire. 1... Narrow width sheet, 2... Ceiling surface, 3... Case, 4... Sheet winding shaft, 5... Winding mechanism, 6...
... Seat plate, 7... Locking tool, 8... Seat plate winding wire, 9... Set screw, 10... Adjustment fitting, 11...
...Cover, 12...Wire pull car, 13...Wire winding drum, 14...Connection fittings, 15...Stopper, 16...Stopper receiver, 17...Guide rail, 18...Hook for manual hoisting, 19...
Operation axis, 20... Brake wheel, 21, 22
... Bevel gear, 23 ... Transmission shaft, 24 ... Brake arm, 25 ... Operation rod, 26 ... Claw,
28... Solenoid, 29... Operating rod, 30...
Brake release grip, 31... Brake return grip, 32... Support bracket, 33... Mandrel, 3
4...Bearing, 35...Mandrel guide, 36...Coil spring.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A plurality of short winding shafts 4 are arranged horizontally with the same height along the direction in which a smoke prevention screen is installed on the ceiling of a building, and at least one end of each winding shaft is The non-combustible sheets 1 are arranged alternately so that they overlap each other when viewed from the front side, and a narrow noncombustible sheet 1 corresponding to each of the winding shafts is suspended, and the front and rear winding shafts are further rotated in opposite directions. A biasing means 5 is provided to constantly give a winding tendency to the narrow sheets, and the side edges of adjacent narrow sheets are substantially overlapped and brought into close contact with each other, and the lower ends of the respective narrow sheets are connected to a common seat plate 6. The seat plate hoisting wires 8 which are connected together through the ceiling and further hanging from the ceiling are branched, and each of the branched wires is inserted between the side edges of the overlapping sheets, and then the wires are A smoke prevention screen characterized in that one end of the wire is fixed to the seat plate, while the other end of the wire is connected to a winding device 13 with a release mechanism in the ceiling. 2. The smoke-proof screen according to claim 1, wherein the seat plate 6 is provided with an adjustment tool 10 for adjusting the tension of the wire 8 therein.