JP2000204863A - Opening and closing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small opening and closing device capable of assuredly shielding a part to be shielded. SOLUTION: A winding device main body winding a sheet-shaped shielding sheet engaged slidably with a guide groove 5 of a pair of guide rails 4 and 4 is provided at the upper edge of an opening part in a part to be shielded. A weight part having a weight plate part 26 of which both ends are engaged with the guide groove 5 is provided near the lower edge of the shielding sheet. A flashing part is stored holdingly in the weight part so that it can move forward and backward. Shielding and holding means 40 having a locking part 42 which faces toward the guide groove 5 engageably and disengageably from the end part of the weight plate part 26 and is rotated movably in the forward and backward directions is disposed at the lower part of the guide rail 4. Even if a force to raise the weight part with the opening part closed acts on the shielding sheet, a rising of the weight part can be prevented by the locking of the shielding and holding means 40. Even if a large force enough to bend the weight part acts, a clearance between the weight part and a floor surface is reduced by the locking of the shielding and holding means 40 so as to reduce the size of the flashing part.

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, Japanese Patent Application Laid-Open No. H10-258133.
Patent Document 1: A screen device for preventing the spread of fire by partitioning and shielding a corridor of a building with a flexible shielding sheet as described in Japanese Patent Publication No. 2. Description of the Related Art An opening / closing device that opens and closes an opening of a shielded portion of a building with a shield, such as a device, is known.

For example, in the screen device described in Japanese Patent Application Laid-Open No. H10-258133, a longitudinally extending side wall surface of a corridor is provided at a position serving as an opening for partitioning a corridor to be a shielded portion and partially shielding the corridor. A pair of guide rails having concave guide grooves along the vertical direction are provided so as to face each other. In addition, a winding device having a winding portion that is axially supported along the width direction of the corridor is provided on the ceiling of the corridor, which is the upper edge of the opening of the shielded portion where the guide rail is located. 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, a weight portion is provided at the lower end edge of the shielding sheet to land on the floor of the corridor, which is the lower edge of the opening of the shielded portion, and the shielding sheet shields the corridor by its own weight.

[0004] However, Japanese Patent Application Laid-Open No. 10-2581
In a screen device described in JP-A-33-33, for example, as shown in FIG. 19, a case where a thermal load is applied to a shielding sheet and the shielding sheet contracts, or a case where a wind pressure is applied to one surface side of the shielding sheet and the sheet is bent. In addition, there is a possibility that a clearance is formed apart from the floor surface 81 so that the weight portion 80 landing on the floor surface is lifted, and a reliable shielding by the shielding sheet 82 cannot be obtained.

Therefore, as shown in FIG. 20, the weight portion 80 accommodates the draining portion 85 by its own weight so as to be able to advance and retreat from the lower surface of the weight portion 80, and even if the shielding sheet 82 contracts and the weight portion 80 is lifted. A configuration is known in which the water draining portion 85 is placed on the floor surface 81 so as to advance relatively to the weight portion 80 and the shielding is maintained.

[0006]

However, in the structure of the screen device in which the weight portion 80 shown in FIG. 20 is provided with the water draining portion 85 which can move forward and backward, for example, the area closed by the shielding sheet 82 is large, If the distance over which the weight portion 80 can be lifted becomes relatively long due to an increase in the surface receiving contraction or wind pressure, the size of the water drain portion 85 that extends from the weight portion 80 increases, and the water drain portion 85 is housed. The weight portion 80 to be held is also relatively large, so that the entire device becomes large, and the production is complicated, and there is a possibility that the productivity cannot be improved.

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 a small opening and closing device capable of reliably shielding a shielded portion.

[0008]

According to a first aspect of the present invention, there is provided an opening / closing device, comprising: a movable substantially planar shield for opening and closing an opening opening to a shielded portion; An advancing means provided on the distal end side and capable of advancing in the moving direction; and a shielding holding means engaging with at least one of the vicinity of the edge of the opening and the shielding body to hold a closed state of the opening. It is provided.

[0009] A movable means is provided at the front end of the movable substantially planar shield which opens and closes the opening opening to the shielded portion so as to be able to advance in the moving direction. The shield holding means is provided for engaging at least one of the vicinity of the edge of the portion and the shield to maintain the closed state of the opening, so that, for example, the shield is contracted by a thermal load, or flexed by wind pressure. In the event that the shield holding means engages to hold the closed state of the opening, the weight is prevented from lifting, and the tip of the shield in the moving direction is temporarily deformed and the tip of the shield is deformed. Even if there is a gap between the portion and the opening, the advancing portion advances from the tip portion in the moving direction of the shield and abuts the edge of the opening to close the gap, so that reliable shielding is obtained, The opening width of the gap can be small, and the entry means Size of the advancing means a quantity expansion can decrease can be achieved.

According to a second aspect of the present invention, there is provided the opening and closing device according to the first aspect, which is provided at an edge of the opening that opens to the shielded portion and is movable in one side in the moving direction of the shield along the longitudinal direction. A guide rail having a guide groove that engages with
The shield holding means is provided in the guide rail and engages with the shield.

[0011] In the guide rail having a guide groove provided on the edge of the opening opening to the shielded portion and movably engaging one side in the moving direction of the shield along the longitudinal direction, the guide rail is provided. Since the shield holding means to be engaged is disposed, the shield holding means to be engaged with the shield in a state where the opening of the shielded portion is closed is not exposed, so that the appearance is improved and the structure of the movable shield is improved. The simplification makes it possible to reduce the size of the entire apparatus.

According to a third aspect of the present invention, there is provided the opening / closing device according to the second aspect, wherein the shield holding means is provided so as to be able to advance and retreat in the guide groove of the guide rail, and the shield covers the opening of the shielded portion. It is provided with a locking portion that abuts upon closing and retreats from the inside of the guide groove, advances again when the shield closes the opening, and engages with the shield.

The guide rail is provided so as to be able to advance and retreat in the guide groove, and when the shield closes the opening of the shielded portion, the shield comes into contact and retracts from the guide groove, and the shield closes the opening. When the shield is provided with a locking portion that advances again and engages with the shield when the shield is closed, engagement of the shield by the shield and holding means when the shield closes the opening is performed only by movement of the shield. It becomes possible and automation can be achieved.

According to a fourth aspect of the present invention, there is provided the opening / closing device according to the third aspect, wherein the shield holding means includes an unlocking means for retracting the locking portion from within the guide groove of the guide rail,
The locking portion has an inclined portion facing the guide groove and extending in a direction intersecting a moving direction in which the shield closes the opening of the shielded portion.

[0015] An inclined portion is provided in the guide groove of the guide rail in a direction intersecting the moving direction in which the shield closes the opening, and the locking portion provided with the inclined portion is retracted from the guide groove. When the opening is closed by the shield, the shield holding means automatically engages. When the opening is opened, the opening is closed by the unlocking means. The state is easily released, and the opening and closing of the opening of the shielded portion is facilitated.

According to a fifth aspect of the present invention, there is provided the opening / closing device according to any one of the first to fourth aspects, wherein the shield is provided so as to be movable substantially in the vertical direction, and the lower edge has a lower edge of the opening. The weight means is provided with an advancing part which is provided on the weight part so as to be movable substantially vertically.

The weight is provided at the lower edge of the shield movable substantially vertically and can contact the lower edge of the opening. Even if, for example, the shield is contracted due to a thermal load acting on the shield or flexed due to wind pressure, the weight is brought into contact with the lower edge of the opening by engagement with the shield holding means. So that the weight portion is prevented from lifting, and even if the weight portion is deformed and a gap is formed between the weight portion and the lower edge of the opening, the advance portion of the advancement means advances by its own weight, for example, to remove the gap. Since the closing is performed, reliable shielding can be obtained, and the opening width of the gap can be reduced, so that the size of the advancing portion and the advancing means for closing the gap can be reduced.

[0018]

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

In FIGS. 16 and 17, reference numeral 1 denotes a screen device as an opening / closing device.
Is an opening 3 of the shielded portion 2, for example, a door opening of a corridor of a building or a room, an opening of an entrance or an emergency exit of a building,
Alternatively, a pair of guide rails 4 opposed to each other are attached to both side walls of an opening edge such as an opening of a place where it is necessary to section such as a fire protection section on fire prevention and smoke prevention or a cold storage warehouse.
4 is provided.

As shown in FIGS. 9 to 13, the guide rails 4 and 4 are formed so that a side plate 4b is bent substantially vertically at one edge in the longitudinal direction of an elongated back plate 4a. Front plate portions 4c that are opposed to each other substantially in parallel with the back plate portion 4a are formed at one longitudinal edge of the side plate portion 4b, and are formed on the side plate portion 4b at one longitudinal edge of the front plate portions 4c and 4c. Guide plates 4d that face each other substantially in parallel have a pair of bent rails 4e and 4f. An abutting plate portion 4g is bent substantially perpendicularly to an edge of the back plate portion 4a of the one rail portion 4e on a side opposite to the side plate portion 4b substantially in parallel with the side plate portion 4b. Also, one rail part 4e
The front plate portion 4c is formed wider than the width of the front plate portion 4c of the other rail portion 4f. In the rail portions 4e and 4f, the contact plate portion 4g of the rail portion 4e abuts on the side plate portion 4b of the rail portion 4f, the back plate portions 4a and 4a are overlapped with each other, and the guide plate portion is provided.
The guide rails 4 and 4d are opposed to each other with a predetermined gap therebetween to open a guide groove 5 along the longitudinal direction of the guide rail 4, and the guide rails 4 and 4 are formed in a substantially cylindrical shape. The guide rails 4 and 4 are attached and fixed to both side walls forming the left and right side edges of the opening 3 so that the guide grooves 5 and 5 face each other and the longitudinal direction is substantially vertical along the vertical direction. ing.

The screen device 1 includes a winding device main body 7 as a winding means. This winding device body 7
Is opposite to the shielded portion 2 which is one surface side of the wall-shaped support wall portion 8 which constitutes the opening 3 of the shielded portion 2 and is provided, for example, so as to partition the upper part of the corridor downward from the ceiling of the corridor. It is mounted on the side 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. An insertion opening 11 is formed in the lower surface of the main body case 10 in an elongated slit shape communicating with the guide groove 5 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, in the body case 10,
A forward / reverse reversible motor 14 as 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.
The drive of 14 is transmitted, and the winding unit 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-like 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, and is wound through the insertion opening 11 of the main body case 10 in a state where both sides in the vertical direction are engaged with the guide grooves 5, 5 of the guide rails 4, 4. Take-up and rewind, that is, up and down movement, which is a movement along the vertical direction. In addition, when the shielding sheet 20 is used as a fire protection / smoke prevention application in places where it is necessary to shield as a fire protection section or used for shielding an evacuation exit, a flame-retardant or non-combustible sheet material, For example, it is formed of non-combustible cloth such as glass cloth or silica cloth. In addition, fire prevention
For applications other than smoke prevention, such as air-tightness at doorways of refrigerators and factories, for dustproofing, sound insulation, etc., or for shielding doorways through which people and goods pass. May be formed of a synthetic resin sheet such as vinyl chloride, polyester, polyurethane, or the like, a flammable or non-flammable treated woven or non-woven fabric, a non-flammable or non-flammable non-flammable cloth, or the like. .

Further, a lower edge, which is an edge opposite to the edge attached to the winding portion 12 of the shielding sheet 20, has an opening 3
A weight portion 22 having an axial direction in a width direction which is a substantially horizontal direction along the plane of the figure is provided. As shown in FIGS. 14 to 17, the weight portion 22 has a substantially U-shaped cross-section with one side opening, and an opening edge bent into a substantially L-shaped cross-section and opposed to each other with a gap therebetween. , 23, and a weight plate portion 26, which is sandwiched between the mounting plate portions 23, 23 of the weight case body 24 and is fixedly mounted together with the lower edge portion of the shielding sheet 20 by bolts 25 or the like. It is formed in a hollow substantially rectangular tube shape having a convex cross section and an internal space 27. Further, an elongated slit 28 is provided on the side surface of the weight case body 24 opposite to the mounting plate portions 23, 23 along the longitudinal direction. The weight case body 24
Is formed to be less than the distance between the guide rails 4 and 4, and the length of the weight plate portion 26 is longer than the length between the guide rails so that both ends can move into the guide grooves 5 and 5. It is formed so that it may fit. That is, both ends of the weight plate 26 project from both ends in the longitudinal direction of the weight case body 24.

The weight portion 22 is provided with a draining portion 30 as an advance portion which is an advance means. This drainer 30
Is a slender plate having a length substantially the same as the slit 28 of the weight portion 22 and a width dimension equal to or less than a height dimension in the internal space 27 of the weight portion 22, and a lower edge of the opening 3 on one side. An elongated plate-shaped contact portion 31 that is in contact with the floor surface of the corridor is provided with a substantially T-shaped cross section, and an elongated plate that engages with the opening edge of the slit 28 and is substantially parallel to the contact portion 31 on the other side. An anti-slip portion 32 is provided integrally. And
The draining portion 30 is housed and held so that the retaining portion 32 is located in the internal space 27 of the weight portion 22, the contact portion 31 is located outside from the lower surface of the weight portion 22, and moves forward and backward by its own weight via the slit 28. Have been.

On the other hand, at the lower ends of the guide rails 4, 4,
As shown in FIGS. 7 to 13, the front surface where the guide groove 5 opens is open, that is, the front plates 4c and 4c and the guide plates 4d and 4d of the guide rail 4 are cut out to form the mounting opening 35. Have been. The guide rails 4 and 4 have approximately L
A pair of lid attachment plates 36, 36 bent in a letter shape are attached to the side plate portion 4b with one edge side facing the opening surface of the mounting opening 35, respectively. A female screw 37 is provided in a portion of the lid mounting plates 36, 36 facing the opening surface of the mounting opening 35. Furthermore, at the lower ends of the guide rails 4 and 4,
A positioning fixing plate 38 having a substantially U-shaped cross section is attached from the back plate portion 4a to both side plate portions 4b, 4b.

At the lower edges of the guide rails 4, 4, shielding holding means 40 are respectively arranged in the mounting openings 35. These shield holding means 40, 40 are shown in FIG.
As shown in FIG. 13, a plate-shaped bottom plate portion 41 capable of closing the lower end surfaces of the guide rails 4 and 4, and a locking portion whose one edge is rotatably supported on one surface side of the bottom plate portion 41. 42 and. The bottom plate portion 41 has a substantially U-shaped escape recess 43 corresponding to the guide plate portions 4d, 4d of the guide rail 4 at the middle of one edge facing the mounting opening portion 35, and has a notch. There is provided a folded portion 45 which is bent substantially vertically upward and has a female screw portion 44 screwed to the lid mounting plate 36. The bottom plate portion 41 is positioned so that the edge opposite to the folded portion 45 is engaged with the lower edge of the positioning and fixing plate 38 attached and fixed in the guide rail 4, and the folded portion is
Mounting opening 35 so that 45 closes a part of mounting opening 35
Is housed inside.

The locking portion 42 includes a pedestal portion 47, a height adjusting portion 48 attached to the pedestal portion 47, and a height adjusting portion 48.
A guide section 49 attached to 48 and a biasing means 50 are provided. The pedestal portion 47 has a stopper portion 53 that abuts on the bottom plate portion 41 formed at one edge of the flat plate portion 52 in a substantially vertically bent manner, and has a stopper portion 53 on the other edge facing the stopper portion 53. The base 54 is bent substantially perpendicularly to the opposite side. The pedestal portion 47 extends from the state in which the flat plate portion 52 is attached to the bottom plate portion 41 with the first butterfly plate 55 and the stopper portion 53 comes into contact with the bottom plate portion 41 toward the side where the base portion 54 is bent. It is pivotally supported. The pedestal portion 47 is constantly urged by a first torsion spring 56 as an urging member provided on the first butterfly plate 55 in a direction in which the stopper portion 53 is pressed against the bottom plate portion 41. The first torsion spring 56
Is set weaker than the downward force of the weight portion 22 due to its own weight.

Further, a pair of bolts 58, 58 provided with external threads (not shown) on the peripheral surface are integrally provided on the base 54 of the pedestal 47 along the vertical direction in the axial direction. A pair of nuts 59, 59 are provided at 58, 58, respectively, and a height adjusting section 48 is constituted by the bolt portion 58 and the pair of nuts 59, 59.

The height adjusting section 48 has a guide section 49.
Is provided. In the guide portion 49, a bolt plate 58, 58 is inserted into one edge of a flat plate portion 60, and a mounting plate portion 61, which is clamped and fixed by a pair of nuts 59, 59, is bent substantially vertically.
On the other edge facing the mounting plate portion 61, a connecting portion 63 having a connecting plate portion 62 bent substantially perpendicularly to the opposite side to the mounting plate portion 61 is provided. A guide plate 65 formed in a substantially rectangular shape is integrally attached to the connecting plate portion 62 of the connecting portion 63 with a screw 66 or the like. An inclined surface 67 is formed as an inclined portion inclined. Then, as shown in FIGS. 1, 2 and 7, the guide plate 65 is moved in a state where the stopper portion 53 of the pedestal portion 47 comes into contact with the bottom plate portion 41 by the bias of the first torsion spring 56. It is formed so as to be located in the guide groove 5.

The guide 49 is provided with a biasing means 50. This urging means 50 includes a plate-shaped urging plate 68,
With one edge of the biasing plate 68 projecting in a direction in which the connecting plate portion 62 of the guide portion 49 projects, the edge is turned from a substantially horizontal plane state to a free end edge directed downward. It is movably supported by a second butterfly plate 69. Further, a second torsion spring 70 as an urging member is provided on the second butterfly plate 69, and the urging plate 68 always has a substantially horizontal plane direction.
One edge is located so as to cross the guide groove 5. The urging force of the second torsion spring 70 is set to be weaker than the urging force of the first torsion spring 56.

The mounting opening 35 of the guide rail 4 has front plates 4c, 4c and guide plates 4d, 4d of the guide rail 4.
A pair of lid portions 72 bent substantially in an L-shape so as to be continuous with 4d is provided with a lid mounting plate 36 mounted on the guide rail 4.
And the bottom plate of the shield holding means 40 housed in the mounting opening 35
It is attached and fixed to the folded part 45 of 41 by a screw 73 and closed. Further, by attaching these lid portions 72, the shield holding means 40 is attached and fixed to the guide rail 4.

An elongated plate-like support plate portion 75 is provided at one of the folded portions 45 of the bottom plate portion 41 at a position substantially opposed to the connection plate portion 62 of the shield holding means 40. Further, a sliding shaft portion 76 is provided on the support plate portion 75 at a position substantially opposed to a screw 66 for attaching the guide plate 65 of the shield holding means 40. Then, one end is attached to a screw 66 for attaching the guide plate 65 and is hung over the sliding shaft portion 76, and the other end is led out of the guide rail 4 through a through hole 77 provided in the lid portion 72, and An operation wire 79 is provided as a lock releasing means formed of, for example, a wire, a piano wire, or the like, which is provided with a handle portion 78 which is pulled by the pull-out device. Then, by pulling the handle 78, the operation wire 79 is turned so that the guide portion 49 is retracted from the guide groove 5 against the bias of the first torsion spring 56 so that the locking portion 42 falls down. Move.

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 is guided and lowered while being engaged with the guide grooves 5, 5, and gradually closes the opening 3 of the shielded portion 2.

When the shielding sheet 20 descends,
As shown in FIG. 15, the water draining section 30 is in a state of being advanced by its own weight so as to be suspended and supported from the lower surface of the weight case body 24.

Then, the draining portion 30 located at the lowermost 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 2 to land on the floor, and the shielding sheet 20 is further lowered. As a result, the water draining portion 30 relatively retreats into the weight case body 24, and the lower surface of the weight case body 24
The motor 14 of the winding device main body 7 stops driving while being landed on the floor via the abutment portion 31 of 30, the rewinding of the shielding sheet 20 stops, and the opening 3 is closed.

On the other hand, when the shielding sheet 20 is rewound and lowered, the weight plate 26 of the weight 22 engaging with the guide groove 5 of the guide rail 4 is lowered as shown in FIG. As shown in the figure, the lower end edge of the weight plate portion 26 comes into contact with the inclined surface 67 of the guide plate 65 of the locking portion 42 constituting the shield holding means 40. Further, when the shielding sheet 20 is lowered, the locking portion 42 falls down against the bias of the first torsion spring 56 so that the weight plate portion 26 slides on the inclined surface 67 due to the weight of the weight portion 22. Rotate.

When the shielding sheet 20 further descends and the weight plate 26 gets over the guide plate 65 so as to push away, the lower edge of the weight plate 26 comes into contact with the urging plate 68 as shown in FIG.
It rotates so as to push the urging plate 68 downward against the urging of the second torsion spring 70. Further, when the shielding sheet 20 descends and the lower surface of the weight case body 24 lands on the floor via the contact portion 31 of the draining portion 30, as shown in FIG.
The upper edge passes through the connecting plate portion 62 of the guide portion 49,
A state in which the locking portion 42 is rotated to the original position by the bias of the first torsion spring 56, and the coupling plate portion 62 of the guide portion 49 of the locking portion 42 is locked to the upper edge of the weight plate portion 26. Becomes

The urging plate 68 is provided with a first torsion spring.
Since the rotation is biased by the second torsion spring 70 having a biasing force weaker than the biasing force of 56, the locking portion 42 is rotated to the original position, and the biasing plate 68 is moved by the weight plate portion 26. It is in a state where it has been rotated. The weight plate portion 26 is pressed against the edge of the guide groove 5 of the guide rail 4 by the biasing force of the second torsion spring 70 applied to the biasing plate 68, so that the weight portion 22 does not rattle. Locked.

In a state in which the opening 3 of the shielded portion 2 is closed, wind pressure is applied to the shielding sheet 20, for example, by blowing wind or a pressure difference between the shielded portion 2 and the opposite side. Weight 22
Is locked by the locking portion 42 of the shield holding means 40,
It is possible to prevent the weight portion 22 from being lifted up and the closed state from being impaired. Further, even if an external force such as wind is applied, the weight portion 22 is pressed by the urging plate by the urging force of the second torsion spring 70 even when the shielding sheet 20 is fluttering, so that the guide groove 5 of the guide rail 4 is formed.
, The weight plate portion 26 can be prevented from rattling in the guide groove 5 and generating noise.

For example, when a strong external force such as bending is applied to the shielding sheet 20 or a thermal load is applied to the shielding sheet 20 so that the shielding sheet 20 contracts, the weight whose both ends are locked by the locking portion 42 is provided. Since the weight plate portion 26 of the portion 22 is pulled up with a large force, as shown in FIG. 18, the weight case body 24 attached to the weight plate portion 26 bends so as to lift the intermediate portion in the longitudinal direction. On the other hand, since the pulling-up force does not act on the draining portion 30 of the weight portion 22 accommodated in the weight case body 24, the landing is performed without bending. For this reason, the drainage portion is formed from the weight case body 24 in which the intermediate portion is bent and separated from the floor surface.
The operator touches the floor so that 30 faces, and holds the closed state of the opening 3.

On the other hand, when the shielding of the shielded portion 2 is released, that is, when the opening 3 is opened, first, the handle portion 78 of the operation wire 79 is pulled, and the locking portion 42 of the shielding and holding means 40 is rotated so as to be inclined. The state in which the locking portion 42 is locked to the weight plate portion 26 is released. In this state, the motor 14 of the winding device main body 7 is driven in the winding direction by operating various operation switches (not shown), the winding unit 12 is rotated in the winding direction, and the shielding sheet 20 is wound.

As described above, the lower edge of the weight portion 22 that contacts the lower edge of the opening 3 provided at the lower edge of the substantially planar shielding sheet 20 capable of opening and closing the opening 3 of the shielded portion 2 is opened. A guide that guides the movement of the shielding sheet 20 by arranging a drainer 30 that can contact the lower edge of the part 3 movably in the vertical direction and one edge of the shielding sheet 20 is movably engaged. Since the shield holding means 40 is provided in the guide groove 5 of the rail 4 so as to engage with the weight portion 22 so as to be able to engage and disengage with the weight portion 22 and keep the weight portion 22 in contact with the lower edge of the opening 3. Even if the sheet is contracted by a thermal load or wind force is applied to one surface of the shielding sheet 20 to cause the shielding sheet 20 to bend, the weight portion 22 is engaged with the shielding holding means 40 and the weight portion 22 is opened. 3, so that the weight 22 can be prevented from being lifted, and the shielded state can be maintained, so that dust and smoke can be prevented. , Flameproofing, sound insulation and cold insulation, etc.
Even if the gap is formed by deformation as shown in FIG. 19, both ends in the longitudinal direction are locked by the shield holding means 40, so when the shield holding means 40 is not provided as shown in FIGS. The opening width dimension of the gap can be made smaller than that, and the water draining section 30 that closes the gap can be reduced in size, and the entire device can be reduced in size.

Further, since the draining portion 30 is accommodated and held so as to be able to advance and retreat from the lower surface of the weight portion 22, the draining portion 30 is only exposed when the shielding sheet 20 is contracted and a gap is formed. Since the portion 30 is not exposed, the appearance when the opening 3 is closed can be improved, and the draining portion 30 can be housed and held by its own weight so as to be able to advance and retreat, whereby the structure can be simplified.

Further, the shielding sheet 20 is attached to the shielding holding means 40.
When closing the opening 3 of the shielded portion 2, the weight portion 22 contacts and retreats from the inside of the guide groove 5 of the guide rail 4, and when the weight portion 22 contacts the lower edge of the opening 3, Since the engaging portion 42 is provided so as to protrude and engage with the weight portion 22, it is easy to maintain the weight portion 22 in contact with the lower edge of the opening 3 when the shielding sheet 20 closes the opening 3. Is obtained.

Further, since the inclined surface 67 having a flat surface in a direction intersecting the moving direction in which the shielding sheet 20 closes the opening 3 and faces the guide groove 5 of the guide rail 4 is provided in the locking portion 42, the weight is reduced. The structure in which the flange 22 automatically contacts the lower edge of the opening 3 and closes the opening 3 is easily obtained by the weight of the portion 22.

Then, the locking portion 42 provided with the inclined surface 67 is
Is pivotally supported by the torsion spring 56 so as to be able to advance and retreat to the guide groove 5, so that the weight portion 22 automatically contacts the lower edge of the opening 3 and closes the opening 3 with a simple configuration. The state is obtained.

Further, since the shield holding means 40 is provided with the operation wire 79 for retreating the locking portion 42 from the inside of the guide groove 5, it is not necessary to release the locked state of the shield holding means 40 by using a separate tool or the like. The state in which the shield holding means 40 is engaged with the weight portion 22 to open the opening 3 can be easily released, and the opening 3 of the shielded portion 2 can be easily opened and closed.

The weight portion 22 is provided with a weight plate portion 26 whose both ends are engaged with the guide groove 5, and the weight case body 24 is not engaged with the guide groove 5. Therefore, the width of the guide groove 5 is reduced. As a result, the gap between the shielding sheet 20 and the guide groove 5 can be narrowed, and the closeability of the opening 3 can be improved.

Further, since the shield holding means 40 is provided on each of the pair of guide rails 4, the lifting of the weight 22 can be reliably prevented, and the gap generated by the deformation of the weight 22 as shown in FIG. The size of the draining section 30 can be further reduced, and the entire apparatus can be reduced in size.

The weight plate portion 26 of the weight portion 22 is rotated by the biasing plate 68 which is rotationally biased by the biasing force of the second torsion spring 70.
Is pressed against the edge of the guide groove 5 of the guide rail 4, it is possible to prevent a gap from being formed between the guide groove 4 and the guide groove 5, and it is possible to improve the shielding state.

Further, since the urging plate 68 is provided on the shield holding means 40, the weight plate portion 26 of the weight portion 22 can be reliably connected to the edge of the guide groove 5 of the guide rail 4 in a state where the shielding sheet 20 closes the opening 3. , The installation space can be reduced, and the size of the apparatus can be reduced.

Further, since the urging force of the second torsion spring 70 for urging the urging plate 68 is set to be weaker than the urging force of the first torsion spring 56 of the shield holding means 40, the weight 22 is locked. A structure that prevents a gap from being formed between the guide groove 5 and the guide groove 5 can be easily obtained without impairing the operation of maintaining the closed state of the opening 3.

Further, since the guide rail 4 is used, the movement of the shielding sheet 20 is guided, and the opening and closing of the shielding sheet 20 can be stabilized, and a gap between the shielding sheet 20 and the opening 3 can be hardly generated. 3 can be improved.

In the above embodiment, the shielding member is not limited to a sheet-shaped member, but may be a shutter in which a plurality of slats or panels are connected, such as a shutter, or a slat or panel connected to a sheet-shaped member. It is also possible to adopt a configuration in which a plate-shaped object is slid and moved, not limited to one that moves along the vertical direction, one that moves along the horizontal direction such as a curtain or a sliding door, or a plane that is almost horizontal. Any configuration may be used for the closed state of the opening 3 and the method of moving the shield, such as one that slides and moves the shield that is disposed along the direction in the horizontal direction.

Further, the description has been made by moving the shielding sheet 20 by winding and rewinding with the winding device main body 7 provided with the motor 14 and attached to the support wall portion 8. The shield sheet 20 may be embedded and rewindable so that the shielding sheet 20 advances and retreats from the ceiling surface, and is limited to a configuration in which the winding unit 12 is rotated by the drive of the motor 14 via the drive transmission member 17. It is not something that can be done. In addition, the configuration is not limited to electric power, and any configuration that moves manually or by its own weight such as a shield may be used.

Although the shielding sheet 20 has been described as being formed into a single sheet, for example, a plurality of flexible sheet-shaped sheet members are arranged such that their side edges in the vertical direction, which is the winding direction, overlap each other. It may be provided with a strip, and may be wound up and rewinded integrally with 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 a plurality of sheet members, for example, the weight portion 22 may be provided to be connected to the lower edge of each sheet member, or the weight portion 22 may be provided to each sheet member. .

The guide rail 4 having the guide groove 5
However, for example, a configuration in which a roller is rotatably arranged in the guide groove 5 to improve the mobility of the shield, or the shield is provided on the periphery of the opening 3 without using the guide rail 4 is used. It is good also as composition which one side adheres.

The shield holding means 40 is provided in the guide groove 5 of the guide rail 4. For example, the shield holding means provided on the step portion provided in the guide groove 5 on the weight portion 22 side of the shield sheet 20. When the guide rail 4 is not provided, the shield holding means 40 is provided near the edge of the opening 3. May be provided.

Further, the shield holding means 40 is connected to the guide rail 4.
Are arranged in the guide groove 5 so as to face each other. However, for example, only one guide rail 4 may be provided or only one provided on one side of the shield, or a plurality of guide rails may be provided. Further, the disposition position is not limited to the lower part of the guide rail 4. In addition, in order to obtain a stable shielding state,
It is preferable to provide a pair at opposing positions, and from the point of view of the structure of the shield and the shield holding means 40, it is preferable to dispose it at the tip position in the movement direction of the shield which is the shield position.

On the other hand, as the advance means, the water drain portion 30 as the advance portion is advanced and retracted from the weight portion 22 by its own weight. However, for example, the water drain portion 30 is not provided and the weight case body 24 of the weight portion 22 is provided.
, And the weight case body 24 is held on the weight plate portion 26 so as to be relatively movable in the vertical direction. Further, the water draining section 30 may always be projected from the weight section 22 into the weight section 22 by a biasing means such as a coil spring or a leaf spring. According to this configuration, even with a configuration in which the shield moves in the horizontal direction, the gap can be closed by the drainer 30.

Then, depending on the moving direction and structure of the shield,
The weight 22 may not be provided.

The shielding and holding means 40 includes a locking portion 42
Has been described above, but any configuration that can be engaged to hold the shield 2 in a state where the shield 2 shields the shielded portion 2 may be used.

Further, as the inclined portion, the engaging portion 42 has an inclined surface.
Although the guide plate 65 having the guide plate 65 has been described, the inclined surface 67 is not limited to a flat surface, but may be a curved surface or a substantially rod-like shape whose longitudinal direction is a direction intersecting the vertical direction which is the moving direction of the shield. Any configuration that can guide the locking portion 42 to escape with the movement of the shielding body, such as the one formed in FIG.

On the other hand, the operation wire 79 is used as the unlocking means.
The present invention is not limited to this, and any configuration may be employed in which the shield holding means 40 can be engaged to release the holding of the shielded state by the shield, and the engagement is released by using a separate tool or the like without providing the lock releasing means. And so on. The lock releasing means is provided, for example, at one location, and is provided at a plurality of locations.
May be released. According to this configuration, the operation can be canceled by one operation, and workability is improved. Further, it is preferable that the unlocking means is disposed in a range where the operator can easily reach. Further, from the viewpoint of simplifying the structure, it is preferable to dispose it near the shield holding means 40.

[0067]

According to the opening / closing device according to the first aspect of the present invention, there is provided an advancing means capable of advancing in the moving direction at the distal end side of the moving direction of the shield, and at least one of the vicinity of the edge of the opening and the shield. Since the shield holding means is provided to engage with one or the other and hold the closed state of the opening, for example, a heat load acts on the shield to cause contraction, or a force to bend the shield by wind pressure acts. Even so, the shield holding means engages and holds the closed state of the opening, so that the weight can be prevented from lifting, and if the tip of the shield in the moving direction is deformed, the tip of the shield and the tip of the shield are temporarily deformed. Even if a gap is formed between the gap and the opening, the advancement section advances from the tip end portion in the movement direction of the shield and abuts against the edge of the opening to close the gap, so that the gap can be reliably shielded and the opening width dimension of the gap Is small, and the amount of advance of the advance means can be reduced. Miniaturization of the detection means can be achieved.

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 shield holding means that engages with the shield in the guide rail provided at the edge of the opening of the shielded portion. Since the shield holding means engaging with the shield is not exposed in a state where the opening of the shielded portion is closed, the appearance can be improved, and the structure of the movable shield can be simplified. The overall size can be reduced.

According to the opening and closing device of the third aspect, in addition to the effect of the opening and closing device of the second aspect, the opening and closing portion is provided in the guide groove of the guide rail so as to be able to advance and retreat. When the shield closes the opening, it comes into contact with the shield and retreats from the guide groove, and when the shield closes the opening, it is provided with a locking portion that advances again and engages with the shield. Further, the engagement of the shield by the shield holding means can be achieved only by moving the shield, and automation can be achieved.

According to the opening and closing device according to the fourth aspect, in addition to the effect of the opening and closing device according to the third aspect, a direction intersecting with the moving direction in which the shield faces the guide groove of the guide rail and closes the opening. Since the lock release means for retracting the locking portion provided with the inclined portion from the inside of the guide groove is provided, when the opening is closed by the shield, the shielding holding means automatically engages, and the opening is closed. At the time of opening, the closed state of the opening can be easily released by the lock releasing means, and the opening of the shielded portion can be easily opened and closed.

According to a fifth aspect of the present invention, in addition to the effects of the first to fourth aspects, the weight provided at the lower edge of the shield movable substantially vertically. In addition, since the advancing portion of the advancing means is provided so as to be movable substantially in the vertical direction, for example, a thermal load acts on the shield to cause contraction, or a force to bend the shield due to wind pressure acts. Also, since the weight is kept in contact with the lower edge of the opening by engagement with the shield holding means, the weight can be prevented from lifting, and the weight is temporarily deformed to be in contact with the lower edge of the opening. Even if there is a gap between them, the advance portion of the advancement means advances by its own weight, for example, and closes the gap, so that reliable shielding can be obtained, and the opening width dimension of the gap can be small, and the advance portion that closes the gap In addition, downsizing of the advance means can be achieved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing the vicinity of shield holding means in a state in which an opening is closed by a shielding sheet of a screen device showing an embodiment of an opening and closing device of the present invention.

FIG. 2 is an explanatory view showing a situation in which the shielding sheet closes an opening.

FIG. 3 is an explanatory view showing a situation where the shielding sheet closes an opening.

FIG. 4 is an explanatory view showing a situation in which the shielding sheet closes the opening.

FIG. 5 is an explanatory diagram showing a situation in which the shielding sheet opens an opening.

FIG. 6 is an explanatory view showing a situation in which the shielding sheet opens an opening.

FIG. 7 is a front view showing a guide rail provided with the above-mentioned shield holding means.

FIG. 8 is a side view in which a part of the guide rail is cut away, showing a situation in which the shielding holding means is arranged in the guide rail.

FIG. 9 is a front view showing the guide rail in a state where the mounting opening is opened.

FIG. 10 is a plan view showing a situation in which shielding holding means is provided in the guide rail.

FIG. 11 is a plan sectional view showing the vicinity of the shield holding means in a state where the shielding sheet closes the opening.

FIG. 12 is a partially cut-away plan view showing a guide rail on which the shielding holding means is provided.

FIG. 13 is a partially cutaway side view showing the guide rail on which the shielding holding means is provided.

FIG. 14 is a cross-sectional view showing the vicinity of the weight portion in a state where the opening is shielded.

FIG. 15 is a cross-sectional view of the vicinity of the weight portion showing a state in which only the water draining portion has landed.

FIG. 16 is a front view of the same screen device in a state where an opening is closed.

FIG. 17 is a sectional view of the same.

FIG. 18 is a front view of the vicinity of the weight, showing the screen device in a state where the weight is deformed with the opening closed.

FIG. 19 is a front view showing the vicinity of the weight in a state where the weight is deformed in a state where the opening is closed, showing the conventional screen device.

FIG. 20 is a front view showing the vicinity of a weight portion in a state where a weight portion is deformed in a state where an opening portion is closed, showing another conventional screen device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 Screen device as opening / closing device 2 Shielded portion 3 Opening 4 Guide rail 5 Guide groove 20 Shield sheet as shield 22 Weight portion 30 Drain portion as extension portion as extension means 40 Shield holding means 42 Locking portion 67 Slope as slope 79 Operating wire as unlocking means

Claims (5)

[Claims] 1. A movable, substantially planar shield that closes an opening that opens to a shielded portion so as to be openable and closable, and is provided at a front end of the shield in the movement direction and can advance in the movement direction. An opening / closing device comprising: an advancing means; and a shield holding means that engages with at least one of the vicinity of an edge of the opening and the shield to hold a closed state of the opening. 2. A guide rail having a guide groove provided at an edge of an opening opening to a shielded portion and movably engaging one side in a moving direction of a shield along a longitudinal direction, wherein a shield rail is provided. 2. The switchgear according to claim 1, wherein the means is disposed within the guide rail and engages a shield. 3. The shield holding means is provided so as to be able to advance and retreat in the guide groove of the guide rail, and abuts when the shield closes the opening of the shielded part, and retreats from the guide groove, and 3. The opening / closing device according to claim 2, further comprising a locking portion that advances again when the body closes the opening and engages with the shield. 4. The shielding and holding means includes an unlocking means for retracting the locking portion from within the guide groove of the guide rail, wherein the locking portion faces the guide groove and the shield is an opening of the shielded portion. The opening / closing device according to claim 3, further comprising an inclined portion in a direction intersecting a moving direction of closing the portion. 5. The shielding body is provided so as to be movable substantially in the up-down direction, and has a lower portion provided with a weight portion capable of contacting a lower edge of the opening portion. The opening / closing device according to any one of claims 1 to 4, further comprising an advancing portion movably provided along the path.