JP7401295B2 - smoke screen device - Google Patents

Description

The present invention relates to the technical field of a smoke-proof screen device that is installed to partition a space in a ceiling and prevent (prevent, suppress) the free diffusion of smoke generated in the ceiling in the event of an abnormality such as a fire outbreak. be.

Generally, when an abnormal situation such as a fire occurs inside a building such as a building or a hallway, and smoke is generated due to this, the smoke spreads freely by crawling on the ceiling surface. It is known that this not only promotes the spread of the fire but also increases human casualties.Therefore, panels are installed that hang down from the ceiling to partition the ceiling, thereby allowing the smoke to spread freely. There is a known technology for so-called smoke-proof hanging walls that prevents smoke.
However, in this case, the board used as a smoke-proof hanging wall is always visible hanging from the ceiling, which not only spoils the appearance, but also causes stagnation of air flow in the ceiling at all times. There are problems in terms of air conditioning.
Therefore, there is a known smoke prevention screen technology in which a screen that is normally stored on the ceiling side is suspended from the ceiling when an abnormality such as a fire occurs (for example, see Patent Document 1). However, this method requires manual operation to lower the screen, which is cumbersome to operate, and if a user forgets to do so, there is a problem that the smoke-proof compartment cannot be formed.
On the other hand, there is a known structure in which the screen automatically lowers and hangs from the ceiling based on abnormality detection by an abnormality detection means such as a smoke detector (sensor). There is a problem that it is difficult to store the screen (for example, see Patent Document 2).

Publication No. 58-54131 Special Publication No. 2012-503521

Moreover, in the conventional system, the screen is usually stored in a spiral shape in order to store it as compactly as possible on the ceiling side, but in this case, In order to store a hanging screen for inspection, etc., it is necessary to roll up the screen, but since the screen is wide in the horizontal direction (left and right), it is difficult to store the screen evenly on both sides. Instead, the screen in the rolled up state must be held each time by the abnormality detection means that has returned to the non-detection state, resulting in problems such as poor workability, and the present invention is intended to solve these problems. There are challenges.

The present invention was created for the purpose of solving these problems in view of the above-mentioned circumstances. Consisting of a screen that descends under the weight of the bottom material, a braking means for braking the descent of the screen, a releasing means for releasing the braking of the braking means, and a winding means for winding up the descended screen. In the smoke-proof screen, the braking means, the releasing means, the screen, and the winding means are arranged in a storage case attached to a ceiling surface, and the braking means is arranged to face the screen in the storage case. This is a smoke-proof screen device characterized by the fact that
The invention according to claim 2 is the smoke-proof screen device according to claim 1, wherein the storage case is detachably attached to a ceiling surface.
In the invention of claim 3, the braking means is disposed in the storage case so as to face the screen, the release means is disposed on one side of the screen in the left-right direction, and the winding means is disposed on the other side of the screen in the left-right direction. 3. The smoke-proof screen device according to claim 1, wherein the smoke-proof screen device is disposed on one side.
The invention according to claim 4 is characterized in that the release means operates to release based on a detection signal from an abnormality detection means for detecting an abnormality such as smoke detection, and returns based on disappearance of the detection signal. The smoke-proof screen device according to any one of items 3 to 3.
In the invention according to claim 5, the braking means has a braking body including a descent braking part that comes into contact with the screen to brake the descent of the screen, and a descent permitting part that is separated from the screen and allows the screen to come down, The braking body is configured to be freely displaceable so that the portion facing the screen is displaced from the descent braking portion to the descent permitting portion upon receiving a release operation by the release means, and the brake body is configured such that the portion facing the screen is displaced from the descent permitting portion. 5. The smoke-proof screen device according to claim 1, further comprising a return means for returning to the lowering braking section.
According to the sixth aspect of the invention, when the screen moves upward with the descending braking section facing the screen, the portion facing the screen changes from the descending braking section to the descending permitting section in conjunction with the screen rising. 6. The smoke-proof screen device according to claim 5, wherein the screen is configured so that the screen can be rolled up by the winding means.
According to the seventh aspect of the invention, the braking body is provided with a braking reinforcement part that strengthens the braking force, and when the screen moves in the descending direction in a braking position where the descending braking part is facing the screen, the braking body is interlocked with the descending of the screen. 7. The smoke-proof screen device according to claim 5, wherein the portion facing the screen changes from the descending braking portion to the braking strengthening portion.
The invention according to claim 8 is the smoke-proof screen device according to any one of claims 5 to 7, characterized in that the braking body is configured using an eccentric member that rotates about an eccentric shaft. be.

According to the invention of claim 1, the constituent members constituting the smoke-proof screen device for forming a smoke-proof partition on the ceiling surface are arranged in a storage case attached to the ceiling surface, and Can be compactly attached to a surface.
According to the invention of claim 2, the storage case with the smoke screen inside can be detachably attached to the ceiling surface, which not only allows retrofitting to the existing ceiling surface, but also facilitates maintenance. At the same time, it can be removed from the ceiling surface, which improves work efficiency and makes it easier to replace parts.
According to the invention of claim 3, when the constituent members of the smoke-proof screen device are stored in the storage case, the release means is disposed at one end in the left-right direction of the braking means facing the screen, and Since the winding means can be arranged in series with the winding means arranged on the end side, the storage case can be made more compact.
According to the invention of claim 4, the release means operates to release based on a detection signal from an abnormality detection means such as a smoke detector, and returns to the original state when the detection signal disappears. Return work after inspection work such as inspection becomes easier and work efficiency improves.
According to the invention of claim 5, the braking means displaces the portion facing the screen from the descent braking portion to the descent permitting portion by actuation of the release means based on the detection signal from the abnormality detection means, thereby smoothly displacing the portion facing the screen from the descent braking portion to the descent permitting portion. The braking means, which has been displaced to the lowering permissible state while the screen can be lowered, can be returned to the lowering braking state by the return means, making it easier to return to the original state when periodic inspections are performed.
According to the invention of claim 6, when the lowered screen is wound up on the winding means in a state where the braking means is in the descending braking section state, the braking means lowers in conjunction with winding up of the screen. As a result, in the winding operation of the screen, it becomes unnecessary to release the brake of the braking means, thereby improving operability.
According to the invention of claim 7, when a load is applied in the direction of lowering the screen due to some factor in a normal state, the braking means is placed on the braking reinforcement part side where the braking force is strengthened in response to the lowering of the screen. As a result, the screen is prevented from inadvertently lowering, and maintenance of the normal state is ensured.
According to the invention of claim 8, the brake body is constituted by an eccentric member that rotates about the eccentric shaft, so that the structure can be simplified.

It is a front view of a smoke screen device. (A) and (B) are a side sectional view of one side and a side sectional view of the other side of the smoke screen device. It is a front view of the state where the storage case of a smoke-proof screen device was cut away. (A) and (B) are a side sectional view and a front sectional view of a brake body portion of the smoke screen device. (A) and (B) are enlarged explanatory views of main parts when the braking body is in a downward braking state and a downward permitting state. (A), (B), and (C) are action explanatory views showing states in which the braking body is in a descending braking posture, a descending permitting posture, and a braking strengthening posture. FIG. 3 is a side sectional view of a winding means portion of the smoke screen device. It is a side sectional view showing other examples of a smoke screen device. (A) and (B) are side views showing another example of a braking body. It is a side sectional view showing still another example of a smoke screen device. It is a side sectional view showing still another example of a smoke prevention screen device.

Embodiments of the present invention will be described below based on the drawings. In the drawings, reference numeral 1 denotes a smoke-proof screen device, and a storage case 2 constituting the smoke-proof screen device 1 has a rectangular cylinder shape long in the left-right direction, and an upper surface portion 2a has a fixing member such as a screw. The storage case 2 is detachably attached to the ceiling surface (lower surface of the ceiling board) H via the storage case 2, and the left and right brackets 3 are attached to the left and right ends of the storage case 2 with gaps between them relative to the left and right side panels 2c. The drum shaft 4a of the winding drum 4 is rotatably supported between the brackets 3. A screen 5 having fire resistance (flame retardant, non-combustible) is wound around the winding drum 4. It is designed to hang down (throughout) and descend under the weight of the bottom material 6 provided at the lower edge, thereby forming a smoke-proof section. In this case, the screen 5 is set to come into contact (sliding contact) with an edge portion 2f on one side in the front-rear direction that constitutes the entrance/exit portion 2e.
The left and right end edges of the descending screen 5 are set to be guided by guide rails 7 to which the upper end edges are attached along the wall surface W at the left and right end edges of the storage case 2.
Incidentally, in the storage case 2 of this embodiment, since the upper surface portion 2a is removably fixed to the ceiling surface H via the screws 2b, the work of inserting and removing the screws 2b and the maintenance work of each member device inside the storage case 2 are not necessary. A lid body 2h is provided which can be opened and closed when removing the lid.

Reference numeral 8 denotes a brake body, and the brake body 8 is disposed at the other end edge 2g opposite to the one end edge 2f of the entrance/exit portion 2e, and is connected to an eccentric shaft (cam). It is constituted by an eccentric cam structure that rotates (swings) about a shaft (shaft) 8a, and the cam surface on the surface of the brake body 8 faces the screen 5 at the part that comes into contact with the end edge of the one side. . The cam surface of the braking body 8 presses against the screen 5 at the portion that abuts the one side edge 2f, and applies braking (brake braking) to the downward movement of the screen 5 under the weight of the bottom material 6. ) for regulating (stopping) the screen 5 from descending, and a lower part of the lower part of the lower part of the lower part of the lower part of the part of the lower part of the part that comes into contact with the one side edge part 2f. A descent permitting portion 8c that is spaced apart from the screen 5 to permit the descent of the screen 5; and a descent braking portion 8b which is adjacent to the upper side of the screen 5 and which is in contact with the one side edge portion 2f, and which allows the descent of the screen 5 with respect to the screen 5 A braking reinforcing part 8d, which comes into contact with the screen 5 with a larger pressing force than the braking part 8b, thereby reinforcing the braking force of the screen 5, is formed by varying the diameter (distance) from the eccentric shaft 8a. In other words, the length of the diameter of the eccentric shaft 8a from the axis O of each part is such that the descent permitting portion 8c<the descent braking portion 8b<the braking reinforcement portion 8d.
Further, between the braking body 8 and the bracket 3, there is provided a return bullet mechanism (main body) for returning the braking body 8 to the descending braking part 8b at the part that abuts the one side edge 2f and faces the screen 5. The one in the embodiment is constituted by a torsion machine.) 9 is provided.

Both left and right end edges of the eccentric shaft 8a are rotatably supported by the bracket 3, but one end edge 8aL in the left and right direction penetrates the bracket 3 and connects the bracket 3 on that side to the side plate 2c. It extends to the gap (space, room) L on one side of the gap. A swinging arm 8e is integrally provided on one end edge 8aL, and a rotating body 8f is rotatably provided at the tip of the swinging arm 8e.
Further, in the gap L, there is an electromagnetic solenoid that operates in response to a detection signal from an abnormality detection means (not shown) such as a smoke detector or a fire detector (not shown) (provided at an appropriate location such as the ceiling surface). A release device 10 is provided, which is configured by incorporating a device (for example, a rotary solenoid device). The tip of the actuating arm 10b provided on the actuating shaft 10a is in contact with (or closely facing) the rotating body 8f when the screen 5 is in a braking attitude (normal attitude) to brake the descent of the screen 5. In this state, when the release device 10 receives a detection signal from the abnormality detection means as described above, the actuating arm 10b swings in conjunction with this, and the swing arm 8e is thereby swung. As a result, the screen-facing portion of the brake body 8 is displaced from the descent braking portion 8b to the descent permitting portion 8c. As a result, the braking by the braking body 8 is released, and the screen 5 descends under the weight of the bottom material 6 to form a smoke-proof section hanging from the ceiling surface H.

When the input of the detection signal from the abnormality detection means disappears (disappears) in the smoke-proof state in which the screen 5 hangs down, the release device 9 returns to its original state (original posture), and accordingly, the brake body 8 In this case, the portion facing the screen is displaced from the descent permitting portion 8c to the descent braking portion 8b under the urging force of the return aircraft 9, but the smoke-proof state by the screen 5 is maintained as it is.

On the other hand, the other end edge 4aR in the left and right direction of the drum shaft 4a of the winding drum 4 passes through the bracket 3 and the other gap (space, room) R between the bracket 3 on that side and the side plate 2c. It has even reached the point of The other end portion 4aR is operatively connected to a manual winding mechanism 11 configured using a two-stage bevel gear mechanism 11a, 11b.
The one-stage bevel gear mechanism 11a converts the direction of the power axis of the other end 4aR of the drum shaft 4a facing in the left-right direction to the front-rear direction so that it is removed from the position of the lower guide rail 7 in the front-rear direction. Furthermore, it is configured to be converted into a downward direction using a two-stage bevel gear mechanism 10b. Specifically, the first stage bevel gear mechanism 11a is integrally supported by a bevel gear 15a provided on the other end 4aR of the drum shaft and a support shaft 15 rotatably provided on a support portion 2i provided in the storage case 2. The second stage bevel gear mechanism 11b includes a bevel gear 15c that is integrally supported by the support shaft 15, and a bevel gear 15c that is integrally supported by the support shaft 15, and is housed as an input shaft 11c of the winding mechanism 11. It is configured using a bevel gear 15d that is provided integrally with the input shaft 11c provided in the case 2 and meshes with the bevel gear 15c.
When the external operating rod 12 is removably locked to the input shaft 11c of the winding mechanism 11 provided in this way, when the operating rod 12 is rotated, the drum shaft 4a rotates, and the screen 5 is wound up by the winding drum 4. In this case, in order to ensure that the screen 5 is lowered without the drum shaft 4a receiving resistance due to the rotation of the bevel gear mechanism 11b, the input shaft 11c is rotated in the winding direction of the screen 5 in the winding mechanism 11. In such a case, power is transmitted to rotate the drum shaft 4a in the winding direction, but the rotation operation in the opposite direction is prohibited or cannot be performed without affecting the descent of the screen 5. Therefore, in the present embodiment, a one-way rotation clutch 16 is provided between the support shaft 15 and the bevel gear 15b, and thereby the screen 5 is rotated in the winding direction. When the screen 5 rotates, the support shaft 15 and the bevel gear 15b rotate together to transmit power, and when the screen 5 rotates in the downward direction, the bevel gear 15b rotates freely relative to the support shaft 15. However, as long as these rotations can be controlled even when subjected to resistance from the bevel gear mechanism 10b constituting the winding mechanism 11, it is not necessarily necessary to provide a one-way rotation clutch.
Moreover, in this case, the part of the brake body 8 facing the screen becomes the descending brake part 8b, but since the screen 5 to be wound up moves in the direction of moving the brake body 8 upward, the brake body 8 is The screen 5 receives sliding resistance from the screen moving in the pick-up direction, and swings so that the screen-opposing portion is on the lowering permitting portion 8c side, so that the screen 5 is not braked by the braking portion 7. It is set to be wound onto the winding drum 4.

In the present embodiment configured as described above, the smoke-proof screen device 1 includes a screen 5 that is wound around a winding drum 4 and descends under the weight of the bottom material 6 provided at the lower edge, and the screen 5. 5, a release device 10 that releases the brake from the brake body 8, and a winding mechanism 11 that winds up the screen 5 that has descended. Since the brake body 8, the release device 10, and the winding mechanism 11 are arranged in the storage case 2 attached to the ceiling surface H, the smoke screen device 1 can be mounted on the ceiling surface H in a compact manner. I can do it.

Furthermore, in this case, as the storage case 2 is detachably attached to the ceiling surface H, not only can it be easily retrofitted to the existing ceiling surface H as needed, but also the This improves work efficiency by allowing work to be done by removing it from the surface and placing it on the floor or workbench.
Furthermore, in the storage case 2, a brake body 8 is disposed so as to face the screen 5, a release device 10 is disposed in the gap L on one end side in the left and right direction of the screen 5, and a winding mechanism 11 is disposed on the left and right sides of the screen 5. As a result of being arranged in the gap R on the other end side, the release device 10, the screen 5, the brake body 8, and the winding mechanism 11 can be arranged in series in the left-right direction, making the storage case more compact. This will result in the improvement of

Furthermore, in this case, the release device 10 operates to release based on a detection signal from an abnormality detection means that detects an abnormality such as smoke detection, and returns based on disappearance of the detection signal, so it is difficult to perform periodic inspections, etc. Return work after inspection work becomes easier and work efficiency improves.
Further, in this case, the braking body 8 includes a descent braking section 8b that comes into contact with the screen 5 to brake the descent of the screen, and a descent permitting section 8c that is spaced apart from the screen 5 and allows the screen 5 to come down. Moreover, the braking body 8 is configured such that the opposing portion of the screen 5 is displaced from the descent braking portion 8b to the descent permitting portion 8c upon receiving the release operation by the release device 10, and furthermore, the braking body 8 is configured such that the opposing portion of the screen 5 is displaced from the descent braking portion 8b to the descent permitting portion 8c upon receiving the release operation by the release device 10. When the release operation is no longer performed, the opposing portion of the screen 5 returns from the descent permitting portion 8c to the descent braking portion 8b by the return bullet 9, and as a result, the screen 5 is activated based on the detection signal from the abnormality detection means. While the screen 5 can be smoothly lowered, the braking body 8, which has been displaced to the descending permissible state, can be returned to the descending braking state by the returning bullet 9, and can easily be returned to its original state when periodic inspections are carried out. Become.

Moreover, the braking body 8 is equipped with a braking reinforcement part 8d that strengthens the braking force, and when the descending braking part 8b is in the braking position facing the screen 5, the screen 5 may be lowered due to some reason. When a load is applied in the direction of This prevents the vehicle from descending, ensuring that normal conditions are maintained.
Since the brake body 8 having such a function is constructed using an eccentric member that rotates about the eccentric shaft 8a, the structure is simple.

It should be noted that the present invention is of course not limited to the embodiments described above, and the storage case 2 can be detachably attached to the ceiling surface H by using the storage case 2 as shown in the embodiment shown in FIG. The locking hook 2i formed on the upper surface portion 2a of 2 may be detachably attached to a locking claw 13a provided on a fixture 13 attached to the ceiling surface H. Incidentally, the attachment/detachment operation in this case can be performed by sliding the storage case 2 along the ceiling surface H.
Further, as for the brake body 8, in the above embodiment, an eccentric shaft 8a was provided at a position eccentric from the axis of a cylindrical body, but the brake body 8 is not limited to this, for example, as shown in FIG. 9(A). As shown in the other example of (B), something like an eccentric cam may be adopted, and as the braking body 8, 8g of surface material with rubber elasticity and frictional force is used at the part that comes into contact with the screen 5. may be attached.
Furthermore, as shown in another example in FIG. 10, guide rollers 14 for guiding the movement of the screen 5 are provided in the storage case 2 so that the screen 5 can be stably lowered and wound up. In addition, as in another example shown in FIG. 11, the bottom material 15 is used as the bottom plate of the storage case 2, and the locking portion 15a provided on the bottom material 15 is configured to receive a detection signal from the abnormality detection means. The operating body 16a of the operating release device 16 is detachably locked, and when the release device 16 receives a detection signal, the locking portion 15a is unlocked by the operation of the operating body 16a, Accordingly, the screen 5 is configured to descend under the weight of the bottom material 15, and in this configuration, the release device also serves as a braking means. can also carry out the invention.

INDUSTRIAL APPLICATION This invention can be utilized as a smoke-proof screen device provided in order to partition the space of a ceiling part and to prevent the free diffusion of smoke generated in the ceiling part in an abnormality such as a fire outbreak.

1 Smoke-proof screen device 2 Storage case 4 Winding drum 5 Screen 6 Bottom material 8 Braking body 8a Eccentric shaft 8b Drop braking part 8c Drop allowance part 8d Braking reinforcement part 9 Returning bomb 10 Release device 11 Winding mechanism H Ceiling surface

Claims (8)

A screen wrapped around a winding means and lowered by the weight of a bottom material provided at a lower end edge, a braking means for braking the descent of the screen, and a release means for releasing the braking of the braking means. , and a winding means for winding up the lowered screen,
The braking means, the releasing means, the screen, and the winding means are arranged in a storage case attached to a ceiling surface, and
A smoke -proof screen device characterized in that the braking means is arranged to face the screen within the storage case . 2. The smoke-proof screen device according to claim 1, wherein the storage case is detachably attached to a ceiling surface. 3. The smoke prevention device according to claim 1 , wherein the releasing means is arranged on one side of the screen in the left-right direction, and the winding means is arranged on the other side of the screen in the left-right direction. screen device. 4. The release means operates to release based on a detection signal from an abnormality detection means for detecting an abnormality such as smoke detection, and returns based on disappearance of the detection signal. smoke screen device. The braking means has a braking body including a descent braking part that comes into contact with the screen to brake the descent of the screen, and a descent permitting part that is separated from the screen and allows the screen to come down, and the braking body has a release means. The braking body is configured to be freely displaceable so that the portion facing the screen is displaced from the descent braking portion to the descent permitting portion upon receiving the release operation by 5. The smoke-proof screen device according to claim 1, further comprising a return means. In the braking body, when the screen moves upward with the descending braking section facing the screen, the part facing the screen changes from the descending braking section to the descending permitting section in conjunction with the rising of the screen, and is moved by the winding means. The smoke-proof screen device according to claim 5, characterized in that the screen is configured so that it can be rolled up. The braking body includes a braking reinforcement part that strengthens the braking force, and when the screen moves in the descending direction in a braking position where the descending braking part faces the screen, the part facing the screen performs descending braking in conjunction with the descending of the screen. The smoke-proof screen device according to claim 5 or 6, characterized in that the smoke screen device changes from the side to the braking reinforcement side. 8. The smoke-proof screen device according to claim 5, wherein the brake body is constructed using an eccentric member that rotates about an eccentric shaft.

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