JP2000170460A - Opening/closing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an opening/closing device capable of reliably holding a shielding state of a shielding object part without generating clearance. SOLUTION: A winding device main body for winding a sheet-like shielding sheet 20 for slidably engaging with a guide groove of a pair of guide rails is arranged on the upper edge of an opening part of a shielding object part. A first weight part 22 having both ends for engaging with the guide groove is arranged in a lengthwise shape in the horizontal direction in the lower edge vicinity of the shielding sheet 20. A bellows-shaped extensible/contractible extending/contracting member 24 having plural fold lines 25, 25 in the horizontal direction is arranged in a lower edge part of the shielding sheet 20. A landing draining part 27 having a second weight part 29 is arranged on the lower edge of the shielding sheet 20. Shrinkage force of the extending/contracting member 24 is weakened more than downward force by weight of the draining part 27. The opening part is closely blocked up in a shielding sheet 20-stretching state by contraction of the extending/contracting member 24. When wind pressure is applied to the shielding sheet 20, the extending/contacting member 24 extends, so that the draining part 27 deflects without being raised to be reliably shielded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening and closing device for closing an opening of a portion to be shielded with a substantially planar shield.

[0002]

2. Description of the Related Art Conventionally, for example, a screen device for preventing the spread of a fire as described in Japanese Patent Application Laid-Open No. H10-258133 for dividing a corridor of a building, a screen device for an entrance of a cold storage warehouse, etc. A screen device that closes an opening of a part with a flexible sheet-shaped shielding sheet is known.

[0003] This type of screen apparatus is, for example, provided with a groove vertically extending in the vertical direction on a side wall surface of the corridor at a position serving as an opening for partitioning a corridor to be a part to be shielded and partially shielding the corridor. A pair of guide rails having a groove-shaped guide groove are provided facing each other. Further, on the ceiling of the corridor serving as the upper edge of the opening of the shielded portion where the guide rail is located, a winding device provided with a winding portion axially supported along the width direction of the corridor is provided. I have. The winding device is a flexible sheet-shaped shielding sheet formed of a flame-retardant resin or the like that is guided by engagement of both side edges in the vertical direction with the guide groove of the guide rail to shield the corridor. Is attached to the winding portion, and the shielding sheet is wound and unwound. Further, at the lower edge of the shielding sheet, there is provided an edge which is placed on the floor of the corridor, which is the lower edge of the opening of the shielded part, and the shielding sheet does not curl due to its own weight. It is designed to shield.

[0004]

However, in such a screen device as described above, for example, a thermal load is applied to the shielding sheet, so that the shielding sheet contracts, or both sides of the shielding sheet that closes the opening of the shielded portion. Creating a pressure difference,
The wind may be applied to one side of the shielding sheet, causing the shielding sheet to loosen in an arc shape with a force greater than its own weight. is there.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an opening / closing device capable of reliably maintaining a shielded state of a shielded portion without forming a gap.

[0006]

According to a first aspect of the present invention, there is provided an opening / closing device, comprising: a substantially planar shield capable of closing an opening opening to a shielded portion; and the opening provided at a lower edge of the shield. And an extending means provided on at least a part of the shielding body and extending in a vertical direction by a downward force due to the weight of the edge.

The lower edge is provided with an edge in contact with the lower edge of the opening of the portion to be shielded, and at least a part of the substantially planar shield capable of closing the opening is provided with a lower portion due to the weight of the edge. Because the extension means is provided to extend in the vertical direction by the action of the force, for example, shrinkage due to the thermal load applied to the shield,
Even if the shield is bent by wind pressure and deforms, and the edge is lifted, the elongating means extends in the vertical direction and prevents the edge from lifting, ensuring that the shielded part Is shielded.

According to a second aspect of the present invention, there is provided the opening / closing apparatus according to the first aspect, wherein the extension means has a contracting property of contracting in the vertical direction with a weaker force than the downward force due to the weight of the edge. is there.

The extension means has a contracting property of contracting vertically by a force weaker than the downward force due to the weight of the edge portion. Therefore, the slack of the shield is absorbed by the contraction of the extension means, and the shield is stretched. The shielded part is shielded in the closed state, the appearance of the shielded state is improved, and the occurrence of a gap due to the slack of the shield is prevented.

According to a third aspect of the present invention, in the opening and closing device according to the first or second aspect, the extension means is provided between the shield and the edge.

Since the extension means is provided between the shield and the edge, the extension means is located near the lower edge of the opening of the shielded part, and does not impair the appearance of the shielded part in the shielded state. Even if the shield shrinks or is loosened by an external force at any position of the shield to be shielded, the edge is prevented from being lifted and the shielding state is not impaired.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 5, reference numeral 1 denotes a screen device as an opening / closing device. The screen device 1 includes an opening 3 of a shielded portion 2, for example, a door of a corridor of a building or a room, a doorway of a building, or an emergency exit. Such as openings, or fire prevention
A pair of guide rails 4 and 4 are provided opposite to each other on both side walls of the corridor, which is an opening edge of an opening of a place that needs to be partitioned, such as a fire protection section on smoke prevention or a cold storage warehouse. . These guide rails 4 and 4 are formed in a substantially U-shaped cross section in which a guide groove (not shown) is provided on one side surface in the longitudinal direction along the longitudinal direction. It is attached and fixed to both side walls in a substantially vertical shape along the direction.

The screen device 1 includes a winding device main body 7 as a winding means. This winding device body 7
Is a shielded portion 2 that is one side of a wall-shaped support wall portion (not shown) that constitutes the opening 3 of the shielded portion 2 and that is provided so as to partition the upper part of the corridor downward from the ceiling of the corridor, for example. It is mounted on the opposite surface at a position above the guide rails 4 and 4.

The winding device main body 7 has a long box-shaped main body case 10 in a direction facing the guide rails 4 and 4. In addition, an insertion opening (not shown) is formed in the lower surface of the main body case 10 and has an elongated slit shape and communicates with the guide grooves of the guide rails 4 and 4 along the longitudinal direction. In the main body case 10, an elongated rod-shaped winding portion 12 is supported rotatably in a substantially horizontal direction along the plane direction of the opening 3, that is, in a longitudinal direction of the main body case 10. I have. Further, a pulley 13 is integrally provided at one end of the winding portion 12 in the axial direction. Also, body case 10
Inside, a motor 14 capable of reversing forward and reverse as a driving means is provided. The drive pulley 16 provided on the output shaft 15 of the motor 14 is provided with an endless belt-shaped drive transmission member 17 which is wound around the pulley 13 of the winding portion 12, and the drive of the motor 14 is transmitted. The winding part 12 rotates.
The drive transmission member 17 is not limited to an endless belt shape, but may have any configuration for transmitting rotational drive by a chain, a gear, or the like.

One end edge of a sheet-shaped shielding sheet 20 as a shielding body is attached to the winding portion 12.
Reference numeral 20 denotes a winding portion 12 which is rotated by the drive of a motor 14. The winding portion 12 is wound and unwound through the insertion opening of the main body case 10 in a state where both sides in the vertical direction are engaged with the guide grooves of the guide rails 4, 4. That is, it is raised and lowered. The shielding sheet 20 is a sheet material having flame retardancy or non-combustibility when used as a fire or smoke protection in places where it is necessary to shield as a fire protection section or when used as an evacuation exit. For example, it is formed of non-combustible cloth such as glass cloth and silica cloth. In addition, for applications other than fire / smoke prevention applications, for example, applications for maintaining airtightness at entrances and exits of refrigerators, factories, etc., for dust prevention,
When used for sound insulation, etc., or when used for shielding entrances and exits through which people and goods pass, synthetic resin sheets such as vinyl chloride, polyester, polyurethane, etc. Or,
It may be formed of a woven fabric, nonwoven fabric, or cloth that does not have flame retardancy or noncombustibility.

Further, a lower edge, which is an edge opposite to an edge attached to the winding portion 12 of the shielding sheet 20, has an opening 3
A cylindrical mounting portion 21 having an axial direction in a width direction that is a substantially horizontal direction along the plane of the figure is provided. In the mounting portion 21, an elongated plate-shaped first weight portion 22, which is a weight portion, is provided.

The lower edge of the mounting portion 21 of the shielding sheet 20 is an elastic member 24 which is an elongate member as a belt-like elongating means along the longitudinal direction of the first weight portion 22. That is, this elastic member 24 is, for example, a part of the lower portion of the shielding sheet 20, and a plurality of folds 2 along the longitudinal direction of the first weight portion 22.
5 and 25 are provided to provide elasticity, and a pulling force acts against the elasticity in the vertical direction which is the width direction of the elastic member 24, whereby the bellows state is extended to become substantially planar, and the pulling force is reduced. When it does not act, it is formed continuously and integrally with the shielding sheet 20 so as to become bellows again by the restoring force due to elasticity. Then, the elastic member 24 and the first weight portion
With 22, the extension means 26 is constituted. The elastic member 24
Is not limited to one using a part of the shielding sheet 20, but may be another member, such as a sheet-like material that is more flexible than the shielding sheet 20, or a material that has elasticity such as rubber or silicone rubber as a flame-retardant member. Any configuration may be used that extends when a force that extends in the vertical direction acts on the shielding sheet 20.

Further, a drainer 27 as an edge is provided at a lower edge of the elastic member 24. This drainer 27
For example, a contact portion 28 which is bent in a substantially U-shape with a steel plate or the like, and whose lower surface abuts on the floor surface constituting the lower edge of the opening 3 to land on the floor.
And a second weight portion 29 similar to the first weight portion 22 is formed on one surface of the opening of the contact portion 28 in a direction substantially parallel to the opening direction to the bolt 30 and the like together with the lower edge of the elastic member 24. And a mounting portion 31 to be attached by mounting.

The elastic member 24 is located between the draining portion 27 and the first weight portion 22, and the shielding sheet 20 is connected to the first weight portion 22,
Due to the weight of the draining portion 27 including the elastic member 24 and the second weight portion 29, the winding device main body 7 is lifted and lowered by winding and unwinding in a state where the winding device main body 7 is pulled in a substantially planar shape without curling.
That is, it is slidable along the plane of the opening 3.

The contracting contraction force, which is the restoring force due to the elasticity of the elastic member 24, is set to be weaker than the downward force due to the weight of the drainer 27. That is, as described above, when the weight of the draining portion 27 acts on the elastic member 24, the stretchable member 24 expands substantially in a sheet shape, and when the weight of the draining portion 27 does not act much, the elastic member 24 contracts in a bellows shape by the restoring force due to elasticity. It has become.

Next, the operation of the above embodiment will be described.

In order to shield the shielded portion 2, the motor 14 of the winding device main body 7 is operated by operating various operation switches (not shown) or operating a sensor for detecting flame or smoke.
Drives in the rewind direction. When the motor 14 is driven, the rotational drive is transmitted to the pulley via the drive pulley 16 and the drive transmission member 17 provided on the output shaft 15 of the motor
Rotates in the rewind direction. By the rotation of the winding portion 12 in the rewinding direction, the shielding sheet 20 wound on the winding portion 12 is unwound. The shielding sheet 20 has a guide rail 4 on both sides through an insertion opening 11 opened in the main body case 10 of the winding device main body 7 in a flat state in which the lower end edge is pulled downward by the weight of the weight portion 22. 4 and is guided and lowered while being guided, and gradually closes the opening 3 of the shielded portion 2.

When the shielding sheet 20 is lowered,
As shown in FIG. 2, the shielding sheet 20 is stretched by the weight of the first weight portion 22, and the contracting force of the elastic member 24 is set to be smaller than the downward force due to the weight of the draining portion 27. Thus, the weight of the second weight portion 29 of the draining portion 27 is fully extended.

The motor 27 of the winding device main body 7 is placed in a state where the draining portion 27 located at the lowest position of the shielding sheet 20 comes into contact with a floor surface such as a corridor constituting the opening 3 of the shielded portion. The drive of 14 stops, the rewinding of the shielding sheet 20 stops, and the opening 3 is closed.

It should be noted that a slight time lag occurs between the time when the drainer 27 is landed and the time when the motor 14 is stopped.
The shield sheet 20 is slightly unwound and unwound. Then, the shielding sheet 20 is closed in the state where the opening 3 is closed.
As shown in FIGS. 1 and 3, the elastic member 24 is bent by the elastic members 24 at the folds 25, 25 due to the elastic restoring force, as shown in FIGS. It contracts in a state of being folded into a shape, absorbs the surplus, and the shielding sheet 20 closes the opening 3 without slackening.

In this state, for example, a heat load is applied to the shielding sheet 20 so that the shielding sheet 20 contracts, or a pressure difference occurs on both sides of the shielding sheet 20 that closes the opening 3 of the shielded portion 2. As shown in FIG. 4, when a force for lifting the first weight portion 22 acts on the shielding sheet 20 such that the shielding sheet 20 is loosened in an arc shape due to a wind pressure applied to one surface side of the shielding sheet 20, the elastic member 24 is extended. A force is exerted to pull upward. By this force, the elastic member 24 is extended, and the draining portion 27 bends so that the shielding sheet 20 bends while landing, that is, a state where the opening 3 is closed even when the shielding sheet 20 bends is obtained. .

Then, when the force acting on the shielding sheet 20 is released, it contracts again in a bellows shape by the restoring force due to the elasticity of the elastic member 24, and closes the opening 3 by stretching the shielding sheet 20. Becomes

When the shielding of the shielded portion 2 is released,
By operating various unillustrated operation switches, the motor 14 of the winding device main body 7 is driven in the winding direction, the winding unit 12 is rotated in the winding direction, and the shielding sheet 20 is wound. At the time of this winding, since a force to be pulled upward acts on the elastic member 24, first, the elastic member 24 extends substantially in a planar shape, and when the elastic member 24 is completely extended, the draining portion 27 is lifted as shown in FIG. It is wound up.

As described above, the draining section is provided on the shielding sheet 20.
Since the elastic member 24 is extended by the downward force due to the weight of the 27, a draining portion 27 such as a force that bends the shielding sheet 20 or a force that contracts due to a heat load is applied. Even if a force acts in the direction of lifting, the elastic member 24 is extended, the landing state is obtained without raising the drainage portion 27, the closed state of the opening 3 can be secured, dustproofness, smokeproofness, sound insulation. Properties and coolness can be secured.

Further, since the elastic member 24 contracts with a weaker force than the downward force due to the weight of the drainer 27, the shielding sheet
By eliminating the force acting on 20, the opening 3 can be closed in a state where the shielding sheet 20 is stretched without being slackened, so that the appearance can be prevented from being deteriorated due to the slack, and the gap can be prevented from being generated due to the slack.

Since the elastic member 24 is provided at the lower end portion of the shielding sheet 20, that is, between the drain portion 27 and the first weight portion 22, the bellows-like elastic member 24 is located at the lower edge of the opening 3. Therefore, it is difficult to enter the field of view, and it is possible to prevent the appearance of the shielded portion 2 in the shielded state from being impaired. In addition, even if force is applied to any position of the shielding sheet 20 that closes the opening 3, the drainer 27 is Lifting can be prevented, and the shielding state can be reliably ensured.

Further, since the extensible member 24 is formed in an extensible sheet shape, the closed state of the opening 3 can be maintained even if a force acts on the shielding sheet 20 with a simple configuration, and the manufacturability can be improved.

Further, since the elastic member 24 is formed by providing folds 25, 25 on a part of the shielding sheet 20 to impart elasticity,
Even if a force is easily applied to the shielding sheet 20, a configuration in which the closed state of the opening 3 can be maintained is obtained, and the manufacturability can be improved.

Further, since a pair of guide rails 4 having guide grooves for slidably guiding and engaging both sides in the vertical direction which is the sliding direction of the shielding sheet 20 are provided, the shielding sheet 20 is It can slide and move stably when opening and closing,
Even if a force acting on the shielding sheet 20 acts, both edges are engaged with the guide groove, so that a part or all of the force is absorbed by friction between the guide groove and the edge of the shielding sheet 20, Along with the expansion and contraction of the elastic member 24, the shielding property against the force can be improved.

Further, since the first weight portion 22 is provided, even if a force acts on the shielding sheet 20, part and all of the force acting on the weight of the first weight portion 22 is absorbed, and Along with the expansion and contraction of 24, it is possible to improve the shielding against power,
Since tension is applied to the shielding sheet 20 by the first weight portion 22, the elastic member 24 is folded at the lower edge portion of the shielding sheet 20.
25, 25 can be formed integrally, and it is not necessary to sew or bond a separate soft sheet member, and the productivity can be improved.

Since both ends of the first weight portion 22 are movably engaged with the guide grooves of the guide rails 4 and 4, both edges of the shield sheet 20 are guided by the guide rail even if a force acts on the shield sheet 20. It is hard to come off from the guide grooves of 4, 4 and the shielding sheet 20
Can be smoothly opened and closed, and a gap can be prevented from being formed by coming off the guide groove, and the opening 3 can be reliably closed.

In the above embodiment, the extension means
26, a part of the shielding sheet 20 is constituted by the elastic member 24 formed in a bellows shape and the first weight portion 22. However, if the elastic member 24 has contractility, Even if the first weight portion 22 is not provided, the opening 3 can be closed in a state where the shielding sheet 20 is stretched without loosening. Since the first weight portion 22 is not required, the configuration can be simplified and manufacturability can be improved. Further, the entire shielding sheet 20 may be formed in a bellows shape, rubber, or the like so as to be expandable and contractible. According to this configuration, the shielding sheet 20 serves as an elongating means, and expands so as to bend as a whole when a force acts thereon, and when the force stops acting, the opening 3 can be closed in a state of being contracted and stretched again as a whole. .

Although the elastic member 24 has been described as having contractibility, it may be formed of, for example, a member that is more flexible than the shielding sheet 20, or may be simply a part of the shielding sheet 20, and the opening 3 may be formed of the shielding sheet 20. The first weight portion 22 for closing in a stretched state
Can also be provided. With this configuration, even when there is no shrinkage, the weight of the first weight portion 22 causes the shielding sheet 20 to be re-tensioned when the force acting on the shielding sheet 20 is eliminated.

Further, the telescopic member 24 is provided between the first weight portion 22 and the draining portion 27 at the lower edge of the shielding sheet 20, but is provided on both sides in the horizontal direction of the shielding sheet 20. Instead, it may be provided only in the middle of the shielding sheet 20 or may be provided in the vertical direction of the shielding sheet 20.

The shielding sheet 20 has been described as being formed into a single sheet. However, for example, a plurality of sheet members having flexibility are arranged such that their side edges in the vertical direction, which is the winding direction, overlap each other. A configuration may be adopted in which the adjacent sheet members overlap each other in the thickness direction so as to sandwich the adjacent sheet members, and may be integrally wound and unwound by the winding unit 12. According to this configuration, for example, when the screen device 1 is used as a smoke prevention device, an opening is provided between the overlapping sheet members to provide an evacuation exit through which a person can pass. When the shielding sheet 20 is composed of the plurality of sheet members, for example, the first weight portions 22 are staggered in the vertical direction with respect to the plane of the opening 3 on each sheet member. It is preferable to provide the first weight portion 22 and the drain portion 27 so as not to protrude from the overlapping surfaces. With this configuration, it is possible to prevent a gap from being generated between the sheet members, and to reliably shield the shielded portion 2.

Also, the structure in which the shielding sheet 20 is wound up and down so as to be slidable in the vertical direction has been described. However, for example, the shielding sheet 20 is slidably moved in the left and right direction like a curtain, or moved horizontally along the floor surface. Or a configuration in which it is simply suspended and supported without being moved.

Further, the opening / closing device is not limited to the above-mentioned screen device, but may be a shutter device, a blind device, a door device, and the like. For example, a structure in which a plurality of slats and panels are connected, a structure in which a plate-shaped object is simply slid and moved, and a combination of these structures, that is, a structure in which a sheet member and a slat or panel are connected vertically. And so on.

[0044]

According to the opening and closing device according to the first aspect, a downward force due to the weight of the edge acts on at least a part of the shield provided with the edge at the lower edge, thereby extending vertically. For example, even when the shield is contracted by applying a heat load to the shield, or is deformed by wind pressure applied to the shield, even if a force is applied to lift the edge, the elongating means is not affected. It is possible to prevent the edge portion from being lifted up by extending in the vertical direction, and the shielded portion can be reliably shielded.

According to the opening and closing device according to the second aspect, in addition to the effect of the opening and closing device according to the first aspect, the extension means is provided with a contracting property of contracting in the vertical direction with a force weaker than the downward force due to the weight of the edge. Since the slack of the shield can be absorbed by the contraction of the elongating means, and the shielded portion can be shielded while the shield is stretched, the appearance of the shielded state can be improved, and a gap due to the slack of the shield can be provided. Can be prevented.

According to the opening / closing device of the third aspect, in addition to the effect of the opening / closing device of the first or second aspect, the extension means is provided between the shield and the edge, so that the extension means is provided on the portion to be shielded. It is located near the lower edge of the opening and does not impair the appearance of the shielded part in the shielded state, and even if the shield contracts or becomes loose due to external force at any position of the shield to be shielded, the edge rises and shields The state can be prevented from being impaired.

[Brief description of the drawings]

FIG. 1 is a partial perspective view showing the vicinity of a telescopic member of a screen device showing an embodiment of an opening / closing device according to the present invention.

FIG. 2 is a cross-sectional view showing a state in which a drain portion of the shielding sheet is separated from a floor surface.

FIG. 3 is a sectional view showing a state in which the opening is closed.

FIG. 4 is a sectional view showing a state in which wind pressure is applied to the shielding sheet.

FIG. 5 is a front view showing the same screen device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Screen device as an opening / closing device 2 Shielded part 3 Opening 20 Shield sheet as a shield which serves as an extension means 24 Stretchable member which is an extension member which serves as an extension means 26 Extension means 27 Drain portion as an edge

Claims (3)

[Claims] 1. A substantially planar shield capable of closing an opening that opens to a shielded portion, an edge provided at a lower edge of the shield and in contact with a lower edge of the opening, and the shield An extension means provided on at least a part of the opening and extending in a vertical direction when a downward force due to the weight of the edge acts. 2. The opening / closing device according to claim 1, wherein the extension means has a contraction property of contracting in the vertical direction with a force weaker than the downward force due to the weight of the edge. 3. The switchgear according to claim 1, wherein the extension means is provided between the shield and the edge.