JP4884794B2 - Fire and smoke prevention system - Google Patents

Description

The present invention relates to a fire prevention and smoke prevention system.

As a fire prevention and smoke prevention system, a system in which a sheet-like shutter curtain descends based on a fire detection signal to close an opening is known. Here, after the opening of the shutter curtain is fully closed, if the differential pressure is generated across the shutter curtain, the shutter curtain may swell and the seat plate may be lifted up. This causes a problem that fire prevention compartments cannot be formed. In order to eliminate such a problem, it is considered necessary to use a heavier seat plate. However, increasing the weight of the seat plate is dangerous if a person is caught when the shutter curtain is lowered.

In the case of using a fireproof cloth as a fireproof / smokeproof shutter sheet, a resin coating is applied to the sheet in order to improve smoke shielding performance. However, improving the smoke shielding performance means that the seat will not be breathable, so the site of the machine smoke exhaust (in large buildings, etc., smoke is actively discharged using a smoke exhauster in the event of a fire) If a shutter curtain made of such a sheet is used, a differential pressure is generated between the areas to be partitioned by the shutter curtain, the shutter curtain swells, and the shutter curtain edge and the guide rail Friction may occur between the shutter curtains and the fire curtain may not be formed because the shutter curtain cannot be closed. On the other hand, if this is dealt with by increasing the weight of the seat plate, there will be a problem in terms of safety as described above.
Japanese Patent Publication 54-18874

The present invention provides a fire prevention and smoke prevention system capable of preventing the seat plate from lifting after the opening is closed, while ensuring safety in the case where a person comes into contact with a shutter curtain that descends during a fire. It is intended to do.

The fire prevention and smoke prevention system employed by the present invention to achieve such a problem is composed of a seat body and a seat plate attached to the lower end of the seat body. A curtain, watering means for watering the shutter curtain, and control means for controlling the descent of the shutter curtain and watering by the watering means at the time of a fire, the seat plate is configured to be able to store the water sprayed, The control means lowers the weight of the shutter curtain by the weight of the seat plate by detecting fire, and when the seat plate at the lower end of the shutter curtain is lowered to the vicinity of the floor surface or after landing, the water is sprayed on the shutter curtain by the watering means. is configured to store the water to the seat plate, the seat plate by the weight of the water stored in the seat plate is added to the weight of the seat plate To prevent a gap from being formed between the floor surface, a fire smoke system.

Patent Document 1 discloses formation of a water film on a cloth by water supply means, and hook-like means for storing the water that flows down. However, in Patent Document 1, the cloth is automatically lowered by the weight of the water stored in the bowl-shaped means, which is a technical idea different from the gist of the present invention.

In one preferable aspect, the said seat board is comprised from the several part divided | segmented into the length direction, and each part can store water. Preferably, each of the portions has a shape that forms an overlapping portion. In one preferred embodiment, at least the lower end portion of the sheet is composed of a plurality of sheet portions that form overlapping portions, and the overlapping portions form escape openings. In the case where the seat plate is divided in the length direction and is composed of a plurality of portions that form overlapping portions with each other, preferably, the overlapping portions of the seats correspond to the overlapping portions of the seat plate portions.

In one preferred embodiment, the sheet body is a sheet that has air permeability and exhibits airtightness and fire resistance by receiving water spray. “Breathability” means that even when differential pressure occurs when the shutter curtain is lowered, the shutter curtain can be lowered well without causing the shutter curtain to swell by flowing air through the sheet. It is said to have sufficient air permeability. In this case, as long as the sheet body has air permeability as a whole, a part thereof may not include air permeability. The suspension side of the seat (the portion in the case when the opening is fully closed) may not have air permeability. “Fire resistance” is fire resistance that can ensure a function as a fire prevention system that forms a fire prevention section and closes an opening without burning a sheet due to the heat of a fire. “Fire resistance” includes a case where the sheet itself has fire resistance and a case where the sheet which does not have fire resistance by itself contains water to have fire resistance. “Having fire resistance” includes a case where a sheet having a predetermined fire resistance in a state before watering is further improved in fire resistance by watering. The seat having fire resistance is a precondition for the seat having heat insulation. Here, “heat insulation” means the performance of a sheet that divides a space to block the transfer of heat from one space to the other space. In the present invention, heat insulation is achieved by the water content of the sheet.

By configuring the seat plate to store the sprinkled water, the relatively light seat plate descends until the shutter curtain descends and closes the opening. While ensuring safety in the case of being sandwiched in contact, after the opening is closed, by storing the water sprayed on the seat plate, the weight of the water is added to the seat plate, and the seat plate and the floor surface Prevents gaps that could cause fire problems between them.

In the case where the seat plate is composed of a plurality of parts divided in the length direction, each part is further reduced in weight, so that safety is further improved. Moreover, the workability | operativity in case an opening is wide can be improved by dividing | segmenting a seat plate.

In the case of adopting a sheet that has air permeability and has airtightness and fire resistance by receiving water spray, even if a differential pressure occurs when the shutter curtain descends, the descending sheet will ventilate. The shutter curtain does not swell and can be lowered well. The air permeability of the seat is particularly advantageous in the present invention having a relatively lightweight seat plate because it is less susceptible to the differential pressure when the shutter curtain is lowered.

The structure of the fire prevention smoke prevention system which concerns on this invention is demonstrated. The fire and smoke prevention system is composed of a sheet shutter device, and is erected on both ends of the sheet opening shutter 1 and the building opening to open and close the building opening. A pair of guide rails 2 for receiving and guiding is connected to the upper end of the shutter curtain 1, the winding shaft 3 extending in the width direction of the opening, and the winding shaft 3 disposed above the opening of the building. And a shutter case 4 for interior. The shutter curtain 1 includes a sheet body 10, a plurality of retaining guide bodies 11 provided at intervals on the left and right sides of the sheet body 10 in the width direction, and a steel seat provided at the lower end of the sheet body 10. And a plate portion 5.

The fire prevention and smoke prevention system further includes a fire detection means 6 and a water spray means 7, and a control means 8 for controlling the descent of the shutter curtain 1 based on the fire detection and the water spray by the water spray means 7. When the smoke detector exemplified as the fire detection means 6 detects smoke at the time of fire, a fire detection signal is transmitted to the control means 8, and the control means 8 descends the shutter curtain 1 and sprinkles means 7 according to a predetermined procedure. Do watering. The control means 8 may be composed of a plurality of control means for individually controlling the descent of the shutter curtain 1 and the watering by the watering means 7.

The winding shaft 3 is driven to rotate by an opening / closing machine 9, but in one embodiment, the shutter curtain 1 is lowered by the weight of the seat plate 5 of the shutter curtain 1, and the shutter curtain 1 is opened and closed. This is done by machine 9. When the shutter curtain 1 is wound around the winding shaft 3 and stored in the shutter case 4, the rotation of the winding shaft 3 is restricted, and a fire detection signal is transmitted to the control means 8 by the fire detection means 6. Then, the shutter curtain 1 is lowered by its own weight of the seat plate 5 by releasing the rotation restriction of the winding shaft 3 by a signal from the control means 8 to the switch 9. The shutter curtain 1 may be lowered by electric drive.

The water spray means 7 includes a water supply source (not shown), a water supply pipe 70, and a water spray port (nozzle) 71 formed at the tip of the supply pipe 70. The water spray port 71 is connected to the shutter curtain 1 from the ceiling surface. Is directed to the descent path. A valve 72 is provided in the middle of the supply pipe 70. The valve 72 is normally closed, and the valve 72 is opened by a signal from the control means 8, and water is sprayed from the water spout 71. The water spray means 7 has a plurality of water spray ports arranged along the length direction of the shutter curtain 1, and sprays water over the entire shutter curtain 1. The number, arrangement mode, destination direction, shape and the like of the water spout are appropriately selected from the optimum ones. In the illustrated example, the water spouts 71 are provided before and after the descending path of the shutter curtain 1 and water is sprayed on both side surfaces of the shutter curtain 1, but the water spouts 71 may be provided on one side. . When the shutter curtain 1 as a whole has air permeability and is composed of sheets that are airtight and fire resistant by receiving water spray (such sheets are considered to have low fire resistance before water spray). In addition, it is desirable to provide the watering means 7A also in the shutter case 4. Further, the side where the fire has occurred may be detected by a smoke detector, and only the side where the fire has occurred may be sprinkled. By configuring the upper end portion of the shutter curtain 1 (which is located in the case 4 even in the fully closed state) from a fireproof cloth, the watering means in the case 4 can be omitted. The valve 72 may be a water amount variable valve. For example, the amount of water sprayed from the sprinkling port 71 may be increased every predetermined time by a timer built in the control means.

The sheet body 10 is formed of a sheet that has air permeability and exhibits airtightness and fire resistance by receiving water spray. The structure and material of such a sheet are not limited, and the structure may be a non-woven fabric, a knitted fabric, a woven fabric, and other sheets. Examples of the material include polyacrylate fibers, polyesters, and mixed fibers thereof. Is done. A sheet having air permeability and exhibiting airtightness and fire resistance by receiving water spray is a sheet having air permeability and water absorption (water content, water retention). The sheet having air permeability and water absorption includes a sheet that actively absorbs water with a water absorbing polymer or the like. As a sheet having air permeability and water absorption, a sheet made of a fiber that is commercially available as a water absorbing fiber can be used.

As a result of a test for confirming the fire resistance and heat shielding properties of the sheet, it was found that a material having high water absorption can obtain good fire resistance and heat shielding properties by spraying water. Moreover, even if watering was stopped, it was confirmed that the specimen had fire resistance and heat insulation while the specimen was wet. Furthermore, more reliable fire resistance and heat insulation can be achieved by continuously spraying water. In the present invention, by forming a sheet using a material having high water absorption, water resistance can be ensured by spraying water and ensuring fire resistance and heat insulation without applying a special coating or the like.

When a sheet airtightness (smoke shielding) confirmation test was performed, it was found that a material having high water absorption can obtain good airtightness by spraying water. The “air tightness” in the present invention means air tightness to the extent that the smoke shielding performance based on the fire prevention regulation related notice is satisfied. Specifically, in the smoke insulation performance test method prescribed in the separate statement of Ministry of Construction Notification No. 2564, the acceptance criteria (as a result of the smoke insulation performance test when the pressure difference is 2 kilograms per square meter, any of the measured values Is less than 0.2 cubic meters per square meter per minute). There are several possible mechanisms for the air-permeable sheet to have air-tightness. When the sheet absorbs water so as to form a water film in the ventilation holes on the surface of the sheet, the sheet may expand by absorbing water. Such as when the vent hole is blocked by expansion.

The substantially lower half of the sheet body 10 is composed of a plurality of sheet portions 10A, 10B, 10C, and 10D that partially overlap each other so as to form an overlapping portion 100. By opening the overlapping portion 100 via the free ends 101 of the sheet portions 10A, 10B, 10C, and 10D that define the end portions in the width direction of the overlapping portion 100, an exit port is formed in the sheet body 10. ing.

The seat plate 5 has a shape or structure capable of storing water. More specifically, the seat plate 5 has a bottom wall 50 and a side wall 51, the upper portion is open, and the interior of the seat plate forms a storage portion 52 so that water can be stored. Yes. If the bottom wall 50 and the side wall 51 are composed of relatively thin plates, the overall weight of the seat plate 5 is relatively light. More specifically, the weight of the seat plate 5 in the case where the shutter curtain 1 is lowered by its own weight in the event of a fire is at least a weight that allows such a weight drop, and at the same time, the shutter curtain 1 that drops by any chance. Even when a person comes into contact with the lower end and is about to be pinched, the weight is such that the pin can be easily pulled out. In one specific aspect, the seat plate 5 has such a weight that a sandwiched load (compression load) due to the weight of the sheet body 10 and the seat plate 5 is 150 N or less.

In the illustrated embodiment, the seat plate 5 is divided into a plurality of parts in the length direction, and each of the divided parts 5A, 5B, 5C, 5D has a bottom wall 50 and a side wall 51, and the internal space is The reservoir 52 is configured to store water. In one embodiment, the seat plate portions 5A, 5B, 5C, 5D are formed by a vertical plate-like portion 53 (not shown in the plan views of FIGS. 4 and 5) extending in the length direction of the seat plate 5. The sheet portions 10A, 10B, 10C, and 10D are connected to the vertical plate-like portions 53 at the lower ends. In this structure, by penetrating a through hole in the vertical plate-like portion 53, the stored water may be moved from one compartment divided forward and backward by the vertical plate-like portion 53 to the other compartment. By doing so, even when the water spout 71 is provided on one side, water can be evenly stored in the front and rear sections. Since the seat plate 5 is composed only of a relatively thin wall body, the seat plate 5 is relatively light, while it is possible to provide a sufficient weight by storing water in the internal storage portion 52. Furthermore, by dividing the seat plate 5 in the length direction (opening width direction), even when a shutter curtain is installed in an opening having a large opening width, the weight of each divided portion of the seat plate and the seat When the load due to the total weight does not exceed 150 N, even if a person touches the lower end of the descending shutter curtain, it does not give a large impact, and it is pinched Even so, it is possible to escape easily.

In the first aspect of the split type seat plate shown in FIG. 4, the seat plate 5 is composed of four portions 5 </ b> A, 5 </ b> B, 5 </ b> C, and 5 </ b> D that each form the storage portion 52. The number of the divided parts is not limited to four, and the number of parts can be appropriately divided according to the opening width or the like. Each of the divided seat plates 5A, 5B, 5C, and 5D has a plurality of finding walls extending in the length direction (opening width direction) of the seat plate 5 and a direction crossing the seat plate (direction orthogonal to the opening width). A storage portion 52 having a side wall 51 composed of a plurality of prospective walls and a bottom wall 50 and having an opening upward from the side wall 51 and the bottom wall 50 is formed. Step portions 50A, 50B, 51B, 50C, 51C, and 50D are formed on the sides of the divided seat plates 5A, 5B, 5C, and 5D that are close to each other, and the step portions overlap each other. Is forming. The step portions 50A, 50B, 51B, 50C, 51C, and 50D of the portions 5A, 5B, 5C, and 5D pass through a pair of facing walls and two pairs of prospecting walls that face each other and are adjacent to each other. Adjacent. Vertical plate-like portions 51A and 51D are provided at the ends of the portions 5A and 5D opposite to the step portions 50A and 50D so as to extend in substantially the same straight line as the vertical plate-like portion 53.

The overlapping portions of the divided seat plate portions 5A, 5B, 5C, and 5D correspond to the overlapping portion 100 formed in the sheet body 10. More specifically, the lower end of the first portion 10A of the sheet body 10 is connected to the vertical plate portions 51A and 53 between the vertical plate portion 51A and the step portion 50A of the first portion 5A of the seat plate. The lower end of the second portion 10B of the sheet body is connected to the vertical plate-like portion 53 between the step portions 50B and 51B of the second portion 5B of the seat plate. The lower end of the third portion 10C of the sheet body is connected to the vertical plate portion 53 between the step portions 50C and 51C of the third portion 5C of the seat plate. The lower end of the fourth portion 10D of the sheet body is connected to the vertical plate portions 53 and 51D between the step portion 50D and the vertical plate portion 51D of the fourth portion 5D of the seat plate.

In the second mode of the split seat plate shown in FIG. 5A, the mode of overlapping the seat portions and the shape of the split seat plate (the shape of the portion forming the overlapping portion) are different. The third mode is the same as the first mode in that the stepped portions overlap each other, but the formation positions of the stepped portions 51B and 50C are different in the portions 5B and 5C. In FIG. 5 (A), the same reference number is attached | subjected to the element which is the same as that of the element in a 1st aspect, or similar, The description regarding the said reference number can be used.

In the third mode of the split type seat plate shown in FIG. 5B, the shapes of the divided seat plate portions 5A, 5B, 5C and 5D (the shapes of the portions forming the overlapping portions) are different. In the first aspect and the second aspect, the overlapping portions are formed by overlapping the stepped portions, but in the second aspect, the portion 5A is the convex portion 50A ′, the portion 5B is the concave portion 50B ′, and the convex portion. 51B ′, the portion 5C has a concave portion 50C ′, and the convex portion 51C ′, and the portion 5D each have a concave portion 50D ′. The convex portion and the concave portion are opposed to each other and are fitted to each other to form an overlapping portion. The convex portion and the concave portion are each formed of two finding walls and three expecting walls. The mode of overlapping of the sheet portions in the third mode is the same as that of the first mode. In FIG. 5 (B), the same reference number is attached | subjected to the element similar to the element in a 1st aspect, and the description regarding the said reference number can be used.

Each divided part 5A, 5B, 5C, 5D of the seat plate has a side wall composed of a plurality of locating pieces and a plurality of prospective pieces, and a bottom wall, and the upper side is open from the side walls and the bottom wall. As long as the storage portion 52 is formed and the divided seat plate portions 5A, 5B, 5C, 5D form an overlapping portion between adjacent portions, the shape and configuration are limited to the illustrated embodiment. Not. In one aspect, the lower ends of the seat portions 10A, 10B, 10C, and 10D are connected to the seat plate portions 5A, 5B, 5C, and 5D only at both ends in the width direction, and the lower ends of the seat portions 10A, 10B, 10C, and 10D. In this case, a gap may be formed. Since the sprinkled water is stored in the seat plate portions 5A, 5B, 5C, and 5D, the gap is filled with water to ensure fire prevention performance. Further, in one aspect, the overlapping portions of the seat plate portions 5A, 5B, 5C, and 5D are connected by pins extending in a direction crossing the seat plate 5, and each portion can be rotated via the pins. You may do it.

The control means 8 controls the descent of the shutter curtain 1 and the watering by the watering means 7 based on the fire detection by the fire detection means 6. FIG. 6 shows a flowchart of the descent of the shutter curtain based on the fire detection and the watering by the watering means. When a fire occurs, the fire is detected by the smoke detector, and a fire detection signal is transmitted to the control means 8. When the control means 8 receives a fire detection signal from the smoke detector, it releases the shutter curtain 1 by releasing the brake means (not shown) of the switch 9. The timing of watering is controlled by the control means 8. The control means 8 starts watering the shutter curtain 1 by the watering means 7 after completion of the lowering of the shutter curtain 1 (after the opening is fully closed). Detection of the landing of the shutter curtain 1 is a method of directly detecting the landing, a method of measuring the time from the start of descent to the landing with a timer, a method of detecting the position of the falling shutter curtain (for example, a lower limit), etc. Is mentioned. The weight of water is added to the seat plate 5 by storing the water sprayed in the storage portion 52 of the seat plate 5. Airtightness and fire resistance are imparted to the sheet that closes the opening by watering.

When the shutter curtain descends, the seat plate is divided in the length direction, so even if a person touches the seat plate, the total weight of the seat plate does not act, and each divided Since the portion can be stored, it is relatively light and safe. In the case where the seat plate is divided, the total sandwiched weight of the seat and the seat plate can be held and the load can be suppressed to 150 N or less. After the shutter curtain descends, water accumulates in the storage portion 52 of the seat plate 5, so that the weight of the water is added to the seat plate 5, and a differential pressure is generated between the partition areas by the shutter curtain, so that the shutter curtain tries to expand. In addition, the seat plate 5 is not lifted, and it is possible to prevent the occurrence of a gap which causes a fire prevention problem between the seat plate and the floor surface, and to maintain a good fireproof / smokeproof performance.

When the shutter curtain is lowered, the sheet is breathable, so even if a differential pressure is generated between the areas to be partitioned due to mechanical smoke, etc., the sheet can be lowered well by allowing the sheet to pass air. Thus, the opening can be closed. After the shutter curtain descends, the sheet absorbs or contains water by spraying water, thereby improving the airtightness and improving the smoke shielding performance. In addition, fire resistance is also improved when the sheet absorbs water or contains water.

It can be used for fire prevention equipment that closes the opening of a building in the event of a fire. More specifically, it can be used to form lots in large spaces such as parking lots, factory production lines, and warehouses. Furthermore, in hospitals and welfare facilities, as a countermeasure for vulnerable people who are difficult to evacuate, It can also be used to form a castle wall (evacuation space) by lowering the curtain to a predetermined portion and sprinkling water.

It is the front view of a sheet shutter device which constitutes a fire prevention smoke prevention system, and a transverse cross section of a sheet lower half part. It is the front view of a sheet shutter device which constitutes a fire prevention smoke prevention system, and a transverse cross section of a sheet lower half part. FIG. 1 differs from FIG. 1 in the manner of overlapping of the respective parts constituting the lower half portion of the sheet. The left figure is a longitudinal sectional view of the seat shutter device, and the right figure is a longitudinal sectional view of a fire prevention and smoke prevention system in which the sheet shutter device is incorporated. It is the top view which shows the 1st aspect of the divided seat board, a longitudinal cross-sectional view, and a front view. The mode of overlapping of the respective parts constituting the lower half portion of the sheet corresponds to that in FIG. (A) The top view which shows the 2nd aspect of the divided seat board, a longitudinal cross-sectional view, and a front view. The mode of overlapping of the respective parts constituting the lower half portion of the sheet corresponds to that in FIG. (B) It is the top view which shows the 1st aspect of the divided seat board, a longitudinal cross-sectional view, and a front view. The mode of overlapping of the respective parts constituting the lower half portion of the sheet corresponds to that in FIG. It is a flowchart of watering by the descent of a shutter curtain based on fire detection, and watering means. It is operation | movement explanatory drawing of a fire prevention smoke prevention system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shutter curtain 10 Sheet body 5 Seat plate 5A, 5B, 5C, 5D Part of seat plate divided | segmented 52 Storage part 6 Fire detection means (smoke detector)
7 Watering means 8 Control means

Claims (3)

A shutter curtain that consists of a seat body and a seat plate attached to the lower end of the seat body, and descends in the event of a fire to close the opening;
Watering means for watering the shutter curtain;
Control means for controlling the descent of the shutter curtain and watering by the watering means in the event of a fire;
Consists of
The seat plate is configured to store water,
The control means, the shutter curtain by fire detection is its own weight drop in weight of the seat plate, or after implantation when the seat plate of the lower end of the shutter curtain falls to near the floor, and sprinkling the shutter curtain by sprinkling means The seat plate is configured to store water, and the weight of the water stored in the seat plate is added to the weight of the seat plate to form a gap between the seat plate and the floor surface. To prevent ,
Fire and smoke protection system. The fireproof / smokeproof system according to claim 1, wherein the seat plate includes a plurality of parts divided in a length direction, and each part can store water. The fireproof and smokeproof system according to any one of claims 1 and 2, wherein the sheet body is a sheet that has air permeability and exhibits airtightness and fire resistance by receiving water spray.

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