JPS607089Y2 - Smoke prevention and fire prevention devices for spiral staircases - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a smoke prevention and fire prevention device for each floor of a spiral staircase provided through each floor of a building.

With this type of staircase, there is a danger that in the event of a fire, the spiral staircase will act as a stairwell, increasing the damage caused by the fire.

This proposal aims to minimize damage caused by fire by making it possible to close off each floor of this type of spiral staircase.

To describe this proposal in detail with reference to the illustrated embodiment, in a spiral staircase 2 that penetrates the circular shape 1 of each floor of the building, the floor 3
A fan-shaped landing board 5 having an angle of slightly 90 degrees is installed on the support 4 of the spiral staircase 2, and the landing board 5 communicates with the floor 3 of each floor.

An outer circumferential guide tube 6 is fixedly installed on the inner circumference of the spiral staircase 2 through which the spiral staircase 2 can penetrate, and this outer circumferential guide tube 6 has multiple stages (smoke prevention panels 1 to be described later).
1.11'...) outer peripheral support rail plates 7,
7'... are provided around the support column 4, while support rail plates 7,
Inner peripheral support guides 8, 8', . . . are provided corresponding to the support plates 9, 9', . Inner circumference bearing car 10
．． 10'... should be installed facing upward.

These outer peripheral support rail plates 7, 7'... and inner peripheral support guide 8
, 8'... are fitted with a plurality of smoke-proof plates 11, 11'... in which the original note 1 is radially divided in a rotatable manner so that the original note 1 can be opened and closed. However, the smoke plate 11.11'
There is an outer bearing wheel 12.1 on the lower surface of each outer circumference of...
2', 12'' facing downward and attach the outer peripheral support rail plate 7,
7'...The upper part is removable, and there is a smoke-proof plate 11.11
A ring plate 13 rotatably fitted to the support column 4 is fixed to the inner edge of '..., and this ring plate 13 is placed on the inner circumferential bearing wheel 10°10'... so that it can be moved freely. It has become.

Long hooking protrusions 14, 14' in the length direction are provided on the side edges of these smoke-proof plates 11, 11'...
When they move in the opening direction or the closing direction or stop, they are latched to each other and interlocked, but the latching protrusion on the open side edge of the lowest smoke prevention plate 11'' is on the lower surface of the landing plate 5. As an adjacent rising shadow plate 15, the shadow plate 15 can be freely latched to a longitudinal latching protrusion 16 provided on the lower surface of the closed side of the landing plate 5 and a latching protrusion 16' provided on the lower surface of the open side. It's Toshide.

Also, the locking protrusions 14 on the side edge of the closing side of the uppermost inspection board 11 serve as abutment plates 17 that can freely abut on both side edges of the dance bridge board 5.

In the figure, reference numeral 18 denotes a treadle located below the dance bridge board 5.

The present invention is realized as described above, and when used in the event of a fire outbreak, etc., as shown in Fig. 1, by pulling out the abutment plate 17 of the uppermost smoke prevention plate 11, the smoke prevention plate 11.11'...・ are sequentially latched onto the latching protrusions 14, 14'... and pulled out from under the dance bridge board 5, and the abutting plate 17 hits the other side edge of the dance bridge board 5', closing the wide mouth 1. do.

The raised shading plate 15 is engaged with the latching protrusion 16 to close the step opening 19 between the dance bridge plate 5 and the smoke prevention plate 11''.

When using a spiral staircase under normal conditions, if you push back the smoke prevention plate 11 with the abutment plate 17, the other smoke prevention plates 11', 11''
11 nt are stored directly under the dance bridge board 5 in a stacked state.

At this time, the shadow plate 15 collides with the latching protrusion 16' on the lower surface of the dance bridge plate 5 and stops.

This project is based on a spiral staircase that penetrates the wide opening of each floor of the building, as shown in Narukami, by installing dancing bridge boards on the floor and pillars of the spiral staircase.Multiple stages of outer peripheral support rail boards are installed around the inner periphery of the waist. A plurality of smoke prevention plates with a wide opening divided radially are mounted on the support rail plate and the inner circumferential support guide of the support column so that the wide opening can be opened and closed freely, thereby preventing the occurrence of fires, etc. In such cases, it is safe to pull out the bridge from below to prevent the spread of fire to the upper floors.

In addition, each smoke prevention plate is provided with a latching protrusion so that it can be freely latched when the smoke prevention plate moves in the opening direction, closing direction, or stops, so that only the smoke prevention plate located at the top level can be pulled out. By pushing it back, you can operate all the smoke-proof panels and easily close the wide opening in an emergency.

Furthermore, since the rising shielding plate can be freely hooked onto the latching protrusion of the dance bridge plate, when the wide opening is closed, the step opening 19 is closed, so that the wide opening is almost completely closed and safe.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the device according to the present invention, showing a state where the smoke-proof plate closes the wide opening, and Fig. 2 is a partial vertical cross-sectional view of the smoke-proof plate housed below the bridge board. FIG. 3 is an end view taken along the line ■--■ in FIG. 2. 1 is a wide mouth, 2 is a spiral staircase, 4 is a pillar, 5 is a dancing bridge board, 7
, 7'... are outer peripheral support rail plates, 8, 8'... are inner peripheral support guides, 11, 11'... are smoke prevention plates, 14.14
'... is a latching protrusion, 15 is a shadow plate, 16゜16' is a latching protrusion.

Claims (1)

[Scope of utility model registration request] In a spiral staircase that penetrates the original notes of each floor of a building, a landing board is installed on the floor and the support of the spiral staircase, and multiple steps of outer peripheral support rail plates are installed around the inner circumference of the original notes. On the inner peripheral support guide provided on the support column corresponding to the support rail plate, a plurality of smoke prevention plates in which the original is divided radially are fitted and placed in order so that the original can be moved freely, so that the original can be opened and closed freely. , each of these smoke-proof panels is provided with a latching protrusion so that it can be hung freely when the smoke-proof panel moves in the opening direction, closing direction, and stops. A smoke prevention and fire prevention device for a spiral staircase in which a shielding plate is provided and can be freely latched onto latching protrusions provided on the lower surface of the closing side and the lower surface of the opening side of the landing board.