JP2000303762A - Shutter for building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a building shutter capable of restraining deflection of a winding part although the diameter of the winding part can be reduced, and of easily achieving a reduction in weight of the winding part and ease of handling. SOLUTION: A winding part 4 disposed in an attic space 3 for an emergency shutter 1 used as a building shutter is freely rotatably supported by brackets 5 at both ends and is upwardly supported by the roller 28 of a deflection restraining means 20 disposed in the center along its axial direction, and a fireproof sheet 6 forming a shutter curtain wound on the winding part 4 is unwound and wound, respectively, by the normal and reverse rotations of the winding part 4 being supported.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention is installed in a building,
The present invention relates to a shutter for buildings having a shutter curtain fed out from a winding section, and can be used as, for example, a fire prevention shutter for fire prevention and smoke prevention, and a slat type shutter for opening and closing an entrance and the like.

[0002]

BACKGROUND ART As a fire-prevention shutter for fire prevention and smoke prevention, a take-up section having both ends in the axial direction rotatably supported by brackets is horizontally arranged behind a ceiling of a building, and is wound around the take-up section. In addition, there is known a building shutter in which a shutter curtain, which is entirely or mostly formed of a fire-resistant sheet, is fed out and wound by forward and reverse rotations of a winding unit. According to this building shutter, since the shutter curtain is made of fire-resistant sheet, the length of the winding section (width of the shutter curtain) can be made large span, and it is suitable for use as a building disaster prevention section. It has the feature that it is.

[0003]

However, if the length of the winding portion is increased to increase the span, the winding portion bends due to its own weight, and when the bending increases, the shutter curtain is wound. It cannot be performed as expected. One solution to this problem is to increase the diameter of the winding section to increase the strength of the winding section.However, if such a solution is adopted, the shutter curtain is made of a sheet. Therefore, the diameter of the entire winding section when the shutter curtain is wound does not increase so much,
Due to the increase in the diameter of the winding unit itself, the weight of the winding unit becomes heavy, and there is a problem that it takes a lot of trouble and time to carry the winding unit under the ceiling.

[0004] It is an object of the present invention to suppress the occurrence of bending in the winding section despite the fact that the diameter of the winding section can be reduced, and to achieve a reduction in the weight of the winding section and ease of handling. To provide a building shutter.

[0005]

SUMMARY OF THE INVENTION A building shutter according to the present invention has a winding portion rotatably supported at both axial ends, a winding portion wound around the winding portion, and a positive portion of the winding portion. In a building shutter provided with a shutter curtain that is fed out and rotated by reverse rotation, a supporting member that supports the winding portion upward is provided in an axial middle portion of the winding portion. It is a feature.

In the present invention, since the support member for supporting the winding portion upward is provided at a portion in the axial direction of the winding portion, even if the diameter of the winding portion is reduced and the strength thereof is reduced, It is possible to prevent the winding portion from being bent by its own weight. For this reason, the weight of the winding unit can be reduced, the work such as carrying the winding unit behind the ceiling can be easily performed, and the handling of the winding unit can be simplified.

Here, suppressing the bending of the winding portion due to its own weight by the supporting member means not only making the bending amount zero, but also reducing the bending amount, and conversely, a suitable upward bending amount. And causing the winding portion to bend to such an extent that the shutter curtain can be wound up as predetermined.

It is preferable that the support member for supporting the winding portion upward has a surface shape and a material having a small coefficient of friction at a portion which comes into contact with the shutter curtain. It may be a rotatable one or a stationary one that does not rotate with respect to the winding unit. One example of the former is that the supporting member is a rotatable roller that hits the lower side of the shutter curtain wound around the winding section. According to this, when the shutter curtain is unwound with respect to the winding unit by the forward / reverse rotation of the winding unit, and when the winding is performed, the roller also rotates, so that the shutter curtain can be smoothly wound and wound, and the shutter curtain can be smoothly wound. The advantage of no damage is obtained.

Further, such a rotatable roller may be provided just below the shutter curtain wound around the winding section, but it is more preferable to arrange the rollers at a plurality of locations spaced apart in the circumferential direction of the shutter curtain. . In this case, the winding portion can be stably supported upward by the plurality of rollers spaced apart in the circumferential direction.

[0010] The winding portion provided with a support member such as a roller may be provided at one or a plurality of portions in the axial direction in the axial direction. The number of the locations can be arbitrarily determined according to the length of the winding section, the diameter of the winding section, and the like. Furthermore, the disposition position of the support member is, for example, when the support member is provided in the middle of one location in the axial direction of the winding unit, the support member is located at the central position in the axial direction of the winding unit, When it is provided at a plurality of locations, it is preferable that the winding portions are positioned at equal intervals in the axial direction.

Further, the support member may be fixedly arranged at a fixed position, but is more preferably arranged so that the position can be adjusted vertically. In this way, the amount of deflection of the winding section can be adjusted to an appropriate amount according to the length and diameter of the winding section, and the winding of the shutter curtain as well as the extension of the shutter curtain at the construction site of the building shutter is ensured. The operation for obtaining the appropriate amount of deflection that can be performed in the above-described manner can be performed.

The position of the support member can be adjusted vertically in order to adjust the amount of bending of the winding portion, so that the position of the support member can be adjusted accurately and vertically. This includes, for example, moving the support member in the radial direction of the winding section or the like so that the position can be adjusted in a direction having a vertical component.

Further, when the support members are arranged at a plurality of positions spaced apart in the circumferential direction of the shutter curtain, and these support members are mounted on one bracket, all the support members are moved by moving the bracket up and down. If these support members are attached to individual brackets, the vertical position of all the support members can be adjusted by moving these brackets up and down individually. May be performed.

The winding section may be constituted by a single continuous member. If it is difficult to constitute the winding section by a single continuous member for reasons of production, transportation, or the like, a plurality of winding sections are required. The winding section may be configured by connecting the winding section constituting members in the axial direction. In the latter case, it is preferable that the support member be applied to a shutter curtain wound around the winding portion at a position deviated from a connection portion between the winding portion constituting members. With this configuration, it is possible to apply the upward supporting force of the support member to the shutter curtain wound around the winding portion in the axially continuous smooth portion of the winding portion. Thus, the upward force from the support member can be reliably transmitted, and occurrence of an accident such as damage to the shutter curtain can be suppressed.

The connecting portion between the winding portion forming members may have a gap between the winding portion outer peripheries, and there is no gap between the outer peripheries, and the outer peripheries are in abutting condition. Those that overlap may be used. In the case of abutting or overlapping, even if there is a step at the abutting part or the end of the overlapping part, it is wound around the winding part at the position deviated from the connection part between the winding parts. By contacting the supporting member with the shutter curtain, the winding portion can be supported upward by the supporting member via the shutter curtain without being affected by the step.

[0016] The connecting portion between the winding portion constituting members is
In a case where the winding section constituting members are connected to each other with an intermediate member interposed therebetween, a connecting section between the winding section forming member and the intermediate member may be included.

Further, when the shutter curtain is made of a sheet, the entire shutter curtain may be formed of one sheet or a plurality of sheets. The position of the shutter curtain wound around the winding portion supported by the support member upward may be a reinforcing portion of the shutter curtain or an unreinforced portion. When the reinforcing portion of the shutter curtain is supported by the support member, the support member can be supported upward by the support member without damaging the shutter curtain. The reinforcing portion of the shutter curtain referred to here is, for example, when the shutter curtain is made of a sheet, among a plurality of sheets forming the shutter curtain, ends of adjacent sheets are joined by sewing or the like. This is a place where polymerization is carried out, a place where they are superimposed without bonding, or a place where a reinforcing sheet is attached.

In addition, not only a support member for supporting the winding section upward but also a vibration preventing member for preventing the winding section from rotating during rotation is provided at an intermediate portion in the axial direction of the winding section. May be provided in the circumferential direction. according to this,
For example, when the winding section rotates at a high speed, it is possible to prevent the winding section from swinging. The shake preventing member may be, for example, a roller or a stationary member that does not rotate.

According to the present invention, fire prevention is applied to a disaster prevention section of a building.
The present invention can be applied to a disaster prevention shutter arranged for smoke prevention and a general building shutter arranged to open and close an opening such as an entrance of a building, a window, or the like. The shutter curtain of the latter building shutter may be formed of slats, may be formed of panels, may be formed of sheets, and may be formed of pipes connected to each other via links. Or a combination of these may be used.

When the present invention is applied to a disaster prevention shutter, the shutter curtain may be formed of a fire-resistant sheet, or may be formed of a metal material other than cloth, such as slats. Or a combination thereof. In addition, for a shutter curtain in which a fire-resistant sheet is used at least in part, a reinforcing member such as a middle crosspiece may be provided at a portion of the fire-resistant sheet. By providing the sheet portion, an escape exit that can pass through the shutter curtain in an emergency such as a fire may be provided.

The maximum length of the shutter curtain that is fed out from the winding section may be a length that reaches from the ceiling to the floor, and stops the movement of the smoke that moves along the ceiling like a smokeproof hanging curtain. May be as short as necessary.

Further, the building shutter according to the present invention may be a multi-stage stop type building shutter capable of stopping the shutter curtain at a plurality of positions in the opening and closing directions. Further, the building shutter according to the present invention may be of a type in which the shutter curtain is fed out from the winding unit by its own weight, and the winding unit is rotated by a driving unit such as a motor or a manual handle. May be a type in which the shutter curtain is fed out, or a type in which the shutter curtain is pulled out by gripping a part of the shutter curtain or by using a tool such as a hook bar and directly fed out from the winding portion. .

The moving direction of the shutter curtain unwound from the winding section and wound may be vertical.
It may be a horizontal direction or an oblique direction that forms an angle with the vertical direction.

[0024]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front sectional view of a building showing the whole of a building shutter according to the present embodiment. The building shutter is a disaster prevention shutter 1 arranged in a disaster prevention section of the building. In the space 3 above the ceiling 2, a winding section 4 of the disaster prevention shutter 1 is horizontally arranged, and both ends of the winding section 4 in the axial direction are brackets attached to the building frame of the space 3 above the ceiling. 5 is rotatably supported. A refractory sheet 6 forming a shutter curtain is wound around the winding portion 4 which is a long and long span shaft. The refractory sheet 6 is a cross-sectional view taken along the line II-II in FIG. 2 hangs vertically through a lintel 7 formed on the ceiling 2 shown in FIG.

Also, as shown in FIG.
The left and right ends are inserted into guide rails 9 arranged on the left and right walls 8 of the building, and are prevented from coming off from the guide rails 9 by the retaining members 10 provided on the left and right ends. The wind-up and rewinding of the wind-up unit 4 is performed by the forward and reverse rotation of the wind-up unit 4, and the seat plate 11 attached to the lower end of the fire-resistant sheet 6 reaches the floor surface 12. The disaster prevention compartment is shielded.

Left and right 2 supporting both ends in the axial direction of the winding section 4
A switch 13 is attached to one of the brackets 5, and the switch 13 is composed of a combination of a motor and a brake. The drive shaft of the motor is connected to the center shaft of the winding unit 4 by a chain 14. Normally, seat plate 1
Until the reticle 1 reaches the lintel 7, the fire-resistant sheet 6 is wound around the winding section 4. When a fire occurs, a sensor (not shown) for detecting smoke or flame is activated. Input to the control device, the brake of the switchgear 13 is released.
And descend while rotating the winding unit 4 forward by its own weight.

On the other hand, when the winding unit 4 is rotated in reverse by the motor of the switch 13 driven by the operation of a switch (not shown), the refractory sheet 6 is wound by the winding unit 4 and rises.

As shown in FIG. 1, a bending suppressing means 20 for suppressing bending of the winding portion 4 having a large span is provided at a central portion in the axial direction of the winding portion 4. The specific structure of the deflection suppressing means 20 is shown in FIGS. The deflection suppressing means 20 is connected to a skeleton bracket 23 attached to a building skeleton 21 such as a wall of the space 3 above the ceiling by a fastener 22 such as a bolt, and connected to the skeleton bracket 23 by a bolt 24 and a double nut 25. And a roller holder 27 attached to the roller-side bracket 26, and a horizontal roller 28 rotatably held by the roller holder 27.

The horizontal portion 23A of the frame-side bracket 23 vertically opposes the upper horizontal portion 26A of the roller-side bracket 26, and the bolt 24 is inserted upward through the horizontal portion 23A and the upper horizontal portion 26A. Double nut 2
5 is screwed. A roller holder 27 is horizontally installed on a pair of left and right lower horizontal portions 26B of the roller side bracket 26, and is mounted on the roller holder 27 in a horizontal direction (thickness direction of the fire-resistant sheet 6) orthogonal to the axial direction of the winding portion 4. Two rollers 28 are provided, and these rollers 28 whose axial direction is parallel to the winding section 4 are applied to the lower surface of the refractory sheet 6 wound around the winding section 4.

The deflection suppressing means 20 constructed as described above
Then, when the lower nut 25B is rotated with respect to the bolt 24 after the upper nut 25A of the double nut 25 is loosened, the roller-side bracket 26 can be moved up and down with respect to the skeleton-side bracket 23. , Winding section 4
The position of the roller 28 can be adjusted in the vertical direction.

Further, as shown in FIG. 1, the refractory sheet 6 forming the shutter curtain has a large span of the winding portion 4, so that the opposite end portions 6 of the two left and right sheet members 6A are provided.
B is overlapped and sewn. For this reason, this portion of the refractory sheet 6 is a reinforcing portion 6C in which two sheets are superimposed, and the roller 28 of the deflection suppressing means 20 reinforces the reinforcing portion 6 of the refractory sheet 6 wound around the winding portion 4. Applied to section 6C.

According to the above embodiment, the roller 28
Is a supporting member for supporting the winding unit 4 upward at the axial center part of the winding unit 4 in the axial direction, so that the winding unit 4 whose both ends in the axial direction are supported by the bracket 5 is large. Even in the case of a span, the bending of the winding section 4 can be suppressed, and operations such as winding of the refractory sheet 6 by reverse rotation of the winding section 4 can be performed as predetermined.

In other words, even if the diameter of the winding section 4 is reduced to reduce the strength of the winding section 4 in the bending direction, the roller 2
By the upward support of the winding unit 4 by the winding unit 8, the refractory sheet 6 can be fed and wound by the winding unit 4 without any trouble.

For this reason, it is possible to reduce the weight of the winding unit 4, thereby facilitating the production of the winding unit 4 at the factory and the winding unit 4 at the construction site of the disaster prevention shutter 1. And the like can be simplified, and the handling thereof can be facilitated.

The support member for supporting the winding section 4 upward is a rotatable roller 28.
Is rotated when the refractory sheet 6 is unwound and wound by the forward and reverse rotation of the winding unit 4, so that the refractory sheet 6 can be smoothly unwound and wound without damaging the refractory sheet 6. .

Further, since the rollers 28 are arranged at two places spaced apart in the circumferential direction of the refractory sheet 6 wound around the winding section 4, the rollers 28 can be stably supported upward. become.

Further, in this embodiment, the roller side bracket 26 can be moved up and down with respect to the skeleton side bracket 23 as described above, and the position of the roller 28 can be adjusted in the vertical direction. After the winding unit 4 and the deflection suppressing means 20 are arranged in the space 3 above the ceiling, the rollers 28
Can be performed in the vertical direction. For this reason, depending on the length and diameter of the winding section 4, the winding section 4
The amount of deflection of the refractory sheet 6 can be adjusted to an appropriate amount, so that the refractory sheet 6 can be unwound from the winding section 4 as well as can be reliably wound. It is possible to perform an operation for obtaining the amount of bending of the winding section 4 in which an excessive supporting reaction force does not act on 26.

The roller 28 is applied to the reinforcing portion 6C of the fire-resistant sheet 6 wound around the winding section 4, so that the large upward supporting force of the roller 28 acts on the fire-resistant sheet 6. However, it is possible to prevent the refractory sheet 6 from being damaged.

To adjust the position of the roller 28 in the up and down direction, the bolt 24 is provided with two
The roller-side bracket 26 may be moved up and down by screwing the nuts above and below the horizontal portion 23A of the frame-side bracket 23, rotating the upper nut after loosening the lower nut. Good.

FIG. 4 shows an embodiment in which the winding section 4 is constituted by connecting a plurality of winding section constituting members 4A in the axial direction. Each winding section constituting member 4A is
The distal end connecting portions 30A of the shafts 30 extending from the mutually opposing ends are connected by joining with bolts and nuts, and the connecting portion is provided with a gap S between the outer peripheral portions of the winding portion constituting member 4A.
Is what exists.

A connecting member 31 is provided between a pair of left and right lower horizontal portions 26B of the roller-side bracket 26 of the deflection suppressing means 20, and is rotatably held on the connecting member 31 by a roller holder 37. Two rollers 38 are arranged apart from each other in the axial direction of the winding section 4. These rollers 38 are located at positions deviated from the connection between the winding-up member 4A, that is, at positions deviated from the gap S.
It is applied to the refractory sheet 6 wound around the winding section 4.

According to this embodiment, the winding portion 4 is supported by the roller 38 upward at a position separated from the connecting portion between the winding portion constituting members 4A. Even if it is constituted by connecting the component members 4A, the winding section 4 can be reliably supported by the rollers 38 via the fire-resistant sheet 6, and the fire-resistant sheet 6
Can be prevented from being damaged.

The winding section 4 of the embodiment shown in FIG. 5 is configured to connect a plurality of winding section constituting members 4B in the axial direction, similarly to the embodiment of FIG. The component members 4B are butt-connected by screw connection or the like. Further, the roller-side bracket 26 of the deflection suppressing means 20
A roller 48 having a long axis, which is rotatably held by a roller holder 47, is provided on the connecting member 31, and a groove 48A is formed at the axial center of the roller 48. The position of the groove 48A coincides with the position of the butt-connecting portion between the winding portion constituting members 4B.

According to this embodiment, the winding member 4
Even if there is a step in the butt connection portion between B, the roller 48 can be applied to the refractory sheet 6 wound on the winding section 4 at a position deviating from the step, whereby the refractory sheet 6 Can be prevented from being damaged.

The roller having a long axis with a groove as in this embodiment can be applied to the case where there is a gap in the connecting portion between the winding portion constituting members as shown in FIG. The provision of two rollers spaced apart in the axial direction of the winding unit as shown in FIG. 4 can also be applied to the case where the winding unit components are butt-connected as shown in FIG.

In the embodiment shown in FIGS. 4 and 5, the rollers are separated in the circumferential direction of the refractory sheet 6 wound around the winding section 4, similarly to the embodiment shown in FIGS. A plurality is provided.

[0047]

According to the present invention, although the diameter of the winding portion can be reduced, it is possible to suppress the occurrence of bending in the winding portion, and to achieve a reduction in the weight of the winding portion and ease of handling. The effect is obtained.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a building showing a case where one embodiment of the present invention is applied to a disaster prevention shutter.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a perspective view showing a part of a deflection suppressing unit having a roller as a support member.

FIG. 4 is a front view of an arrangement position of a deflection suppressing unit according to the embodiment when the winding unit is configured by connecting a plurality of winding unit constituent members.

FIG. 5 is a front view of an arrangement portion of a deflection suppressing means showing an embodiment in a case where the winding section is formed in a connected state of winding section constituting members different from that of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Disaster prevention shutter which is a building shutter 4 Winding part 4A, 4B Winding part constituent member 5 Bracket 6 Fireproof sheet which forms a shutter curtain 13 Switch 20 Deflection suppressing means 28, 38, 48 Roller which is a supporting member

Claims (5)

[Claims] 1. A winding section having both ends in the axial direction rotatably supported, and a shutter curtain wound around the winding section and fed out and wound by forward and reverse rotation of the winding section. A shutter for buildings, comprising: a supporting member for supporting the winding portion upward in the axial middle portion of the winding portion. 2. The building shutter according to claim 1, wherein the support member is a rotatable roller that is provided below the shutter curtain wound around the winding unit. . 3. The shutter according to claim 1, wherein the position of the support member is adjustable in a vertical direction. 4. The building shutter according to claim 1, wherein the winding unit is configured by connecting a plurality of winding unit constituent members in an axial direction, and the support member includes a winding member. A shutter for a building, wherein the shutter is applied to the shutter curtain wound around the winding portion at a position deviated from a connecting portion between the connecting portion constituent members. 5. The building shutter according to claim 1, wherein the shutter curtain includes a fire-resistant sheet at least partially.