JP3639089B2 - Screen device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a screen device, and more particularly to a device that prevents the spread and spread of smoke during a fire.
[0002]
[Prior art]
Conventionally, as this type of screen device, for example, there is a fireproof screen device that prevents the diffusion and spread of smoke during a fire. This fireproof screen device has, for example, a guide rail that is fixed relative to both sides and opposed to each other, and an insertion port is formed in the vertical direction, and both side ends in the width direction are inserted into the insertion holes of the guide rails on both sides. A fire-resistant sheet formed by a flame-retardant cloth that is unwound and lowered by a winding drum rotated by an automatic closing device and shields between the guide rails on both sides, and fixed to the lower end of the fire-resistant sheet And a weight body to be landed on the floor surface between the guide rails on both sides. Then, the refractory sheet is rewound by the winding drum, so that the refractory sheet shields the shielded portion between the guide rails on both sides in a state in which the refractory sheet is placed on the weight body and is in tension.
[0003]
[Problems to be solved by the invention]
In the conventional fireproof screen device, when the automatic return device is not used in combination with the automatic closing device that rewinds and rotates the winding drum, the winding drum is rewinded and the fireproof sheet is lowered, and the lower end of the fireproof sheet Even if the weight of the body is grounded and the shielded part is shielded, the take-up drum stops rewinding rotation and does not automatically return, but further rotates in the rewinding direction due to inertia. The fireproof sheet that shields the shielded part is wound up in reverse, and the weight body at the lower end of the fireproof sheet is pulled up from the floor surface. Smoke, hot air, etc. are generated between the weight body and the floor surface. There is a problem that a gap that flows out may be formed.
[0004]
Also, when the fireproof sheet is heated by fire heat such as hot air in a state where the shielded part is shielded by the fireproof sheet, the fireproof sheet contracts upward, and the weight body is formed by the heat-shrinkable fireproof sheet. There is a problem that smoke, hot air, or the like may flow out between the weight body and the floor surface.
[0005]
The present invention has been made in view of such a problem, and when shielding a shielded portion with a sheet body, the shielded portion can be shielded in a state in which the sheet body is securely slackened in the vertical direction. When the sheet body whose shielded part is shielded by this winding drum is wound in the reverse direction, the sheet body is prevented from being rolled up and the airtightness between the weight body and the floor surface is ensured. Even if the sheet body heat-shrinks upward, it is possible to prevent the weight body from being pulled up from the floor surface by this sheet body and to securely maintain the airtightness between the weight body and the floor surface. An object of the present invention is to provide a screen device that can be used.
[0006]
[Means for Solving the Problems]
The screen device according to claim 1 is fixed relative to both sides of the shielded portion and is opposed to each other and has an insertion slot formed in the vertical direction, and is rotatable upward between the guide rails on both sides. The winding drum provided, and the winding drum is wound around the winding drum so that it can be rewound freely. A sheet body that covers the floor surface of the shielded portion and shields the shielded portion, and the sheet body is loosened when unwound from the winding drum and shields the shielded portion. A first weight body in the width direction of the sheet body that is formed in length and is provided at the lower end portion of the sheet body and is landed on the floor surface of the shielded portion, and both end portions provided at the upper portion of the sheet body Projecting at both end portions of the sheet body as an engaging portion, the first A second weight body in the width direction of the sheet body that loosens the sheet body when the weight body is landed, and the guide rails on both sides are provided on the guide rails, respectively. A guide body for guiding the engaging portion of the weight body, and the second at the time of rotation due to the inertia of the take-up drum which is provided on the guide body and rewinds and lowers the sheet body to a position where the shielded portion is shielded. And a stopper for engaging the engaging portion of the weight body to prevent the sheet body from being rolled up.
[0007]
When the take-up drum is driven and rotated in the direction of rewinding the sheet body, the sheet body is sequentially rewound from the take-up drum. Is smoothly lowered by the weight of the first weight body.
[0008]
Further, the first weight body at the lower end of the sheet body is landed on the floor surface of the shielded portion, so that the shielded portion is shielded by the sheet body and the first weight body, At this time, even if the first weight body at the lower end portion of the sheet body is landed on the floor surface of the shielded portion, the sheet body is further rewound by a predetermined length from the take-up drum. The sheet body is pushed downward by the weight of the second weight body in a state where the weight body is landed on the floor surface, and the lower portion of the sheet body is deformed into a state in which the sheet body is loosened in a substantially wave shape.
[0009]
Then, the drive rotation of the take-up drum is stopped. At this time, when the take-up drum is not immediately stopped and further rotated by inertia in the direction of rewinding the sheet body, that is, at the take-up drum. When the sheet body that shields the shielded part is wound in the reverse direction and wound up, the engaging parts at both ends of the second weight body provided on the upper part of the sheet body are used as stoppers for the guide bodies on both sides. Each is engaged.
[0010]
The stoppers on both sides prevent the sheet body from being wound around the winding drum by being reversely wound through the second weight body, and the first weight at the lower end portion of the sheet body. The weight is held in a state where it is landed on the floor surface.
[0011]
At this time, even if the sheet body whose shielded part is shielded by the take-up drum is wound in the reverse direction and is slightly wound up, the lower part of the sheet body is deformed into a substantially wave-shaped state. Even if the slack portion of the sheet body is slightly stretched and pulled up, the sheet body is not pulled up as a whole. Therefore, the first weight body is raised upward from the floor surface in this sheet body. It is prevented from being pulled up, and it is possible to prevent the formation of a gap through which smoke or hot air flows out between the first weight body and the floor surface.
[0012]
Therefore, when the sheet body is lowered and the shielded part is shielded, the first weight body is always landed on the floor surface, and this sheet body prevents the first weight body from being lifted from the floor surface. The airtightness between the first weight body and the floor surface is reliably maintained, and smoke, hot air, etc. are reliably prevented from flowing out between the first weight body and the floor surface. The
[0013]
According to a second aspect of the present invention, in the screen device according to the first aspect, the guide body communicates with the insertion opening of the guide rail and forms a guide path for guiding the engaging portion of the second weight body. The stopper is formed of a first guide piece and a second guide piece in the vertical direction, and the stopper extends toward the take-up drum at the upper end portion of one of the first guide piece and the second guide piece. It is provided in the guide piece which protrudes in an open inclination and guides the engaging portion of the second weight body.
[0014]
When the sheet body is rewound and the first weight body is landed on the floor surface, the engaging portions at both ends of the second weight body of the sheet body are respectively guided into the guide path. The sheet body is reinforced by the second weight body in which the engaging portions at both ends are inserted into the guide paths on both sides.
[0015]
Further, when the sheet body whose shielded part is shielded by the winding drum is wound in the reverse direction and wound up, the engaging parts at both ends of the second weight body provided on the upper part of the sheet body are respectively Guided by the guide pieces and engaged with stoppers on both sides, the sheet body is prevented from being rolled up.
[0016]
The screen device according to claim 3 is the screen device according to claim 1 or 2, wherein the sheet body is formed of a flame retardant fireproof sheet body, and the first weight body and the second weight body are: It is formed of a flame retardant weight body.
[0017]
The flame retardant fireproof sheet body is heated by fire heat such as hot air in a state where the shielded part is shielded by the flame retardant fireproof sheet body and the first flame retardant weight body. Even if the refractory refractory sheet shrinks upward, the lower part of the flame retardant refractory sheet is deformed into a substantially wave-like shape, so that heat is generated in the sag of the flame retardant refractory sheet. The shrinkage is absorbed and the flame retardant fireproof sheet body is prevented from being pulled up as a whole.
[0018]
Therefore, the first flame retardant weight body is not lifted upward from the floor surface by the flame retardant fireproof sheet body, and smoke is generated between the first flame retardant weight body and the floor surface. It is possible to prevent the formation of a gap through which hot air or the like flows out, the outflow of hot air or the like from one side of the shielded part to the other side, and the diffusion and spread of smoke such as hot air during a fire. .
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0020]
Reference numeral 1 designates left and right guide rails vertically fixed to the opposite side walls of the shielded part 2 such as an entrance, an emergency exit and a passage. The left and right guide rails 1 face each other. The front and rear guide side plate portions 4 that open the insertion port 3 in the vertical direction are provided and are formed in a substantially U-shaped cross section.
[0021]
Further, guide bodies 5 for guiding engaging portions at both ends of a weight body, which will be described later, are provided at upper ends of the left and right guide rails 1, respectively. The left and right guide bodies 5 are opposed to the first guide piece 6 in the up and down direction integrally projecting from the upper end of the guide side plate part 4 on one side of the guide rail 1. The second guide piece 7 in the vertical direction is integrally formed on the upper end portion of the guide side plate part 4 on the other side of the guide rail 1, and the first guide piece 6 and the second guide piece 7 are formed. A guide path 8 is formed in the guide piece 7 so as to communicate with the insertion port 3 and guide engaging portions at both ends of a weight body, which will be described later.
[0022]
Further, guide pieces 9 that are expanded and inclined toward a winding drum, which will be described later, are integrally projected at the upper end portion of the first guide piece 6, and a weight body, which will be described later, is protruded from the protruding end of the guide piece 9. Stoppers 10 for engaging the engaging portions at both ends are respectively provided.
[0023]
The stopper 10 is formed by bending the protruding end portion of the guide piece 9 at a substantially right angle upward with respect to the protruding end portion, and engaging engagement portions at both ends of a weight body to be described later. A locking piece portion 11 to be stopped, and a protruding piece portion 12 that protrudes toward the guide path 8 so as to face the guide piece 9 at the upper end portion of the locking piece portion 11. It is formed in a letter shape.
[0024]
Further, guide protrusions 13 that are widened and inclined in the opposite direction to the guide piece 9 are integrally projected at the upper end portion of the second guide piece 7, and the guide protrusion 13 and the first guide piece 13 are integrally projected. 6 guide pieces 9 guide the engaging portions at both ends of a weight body, which will be described later, to the guide path 8.
[0025]
Next, a screen box 15 into which the upper end portions of the left and right guide rails 1 are inserted is fixed to the upper side wall portion 14 such as the upper casing of the shielded portion 2, and the screen box 15 is attached to the lower end portion of the left and right sides. A left and right screen guide port 16 that is open to communicate with the insertion port 3 of the guide rail 1 is formed.
[0026]
Also, bearing bodies 18 are respectively attached to the left and right side plate portions 17 of the screen box 15, and both end portions of the winding shaft 20 having the right and left winding drums 19 are rotated on the left and right bearing bodies 18, respectively. A rotating wheel 21 is rotatably fixed to one end portion of the winding shaft 20 to drive and rotate the winding shaft 20.
[0027]
Further, a motor 22 capable of rotating forward and backward is fixed in the screen box 15, and a drive wheel 24 is fixed to a position facing the rotating wheel 21 on an output shaft 23 of the motor 22, An endless rotating body 25 is suspended between the rotating wheels 21 so as to freely rotate.
[0028]
The motor 22 is connected to an automatic closing device (not shown) and is operated by an output signal such as a fire signal from the control means. The output of the motor 22 is decelerated and transmitted to the winding shaft 20. The operation of the motor 22 is stopped by a stop signal from the control means that has input a detection signal detected when a weight body, which will be described later, lands on the floor surface 26 of the shielded portion 2. It has become.
[0029]
Next, the upper end portion of the sheet body 27 that shields the shielded portion 2 is fixed to the winding drum 19 and is wound so as to be freely rewound. The sheet body 27 is formed of a flame-retardant fire-resistant sheet body 28, and the flame-retardant fire-resistant sheet body 28 is formed of, for example, a one-piece flame-retardant fabric made of glass cloth, silica cloth, or the like. ing.
[0030]
The flame-retardant refractory sheet body 28 is formed to have a length that is loosened when it is unwound from the take-up drum 19 to shield the shielded portion 2, and both side end portions in the width direction are the left and right guide rails. Each is formed as an insertion portion 29 inserted into one insertion port 3.
[0031]
The flame-retardant fireproof sheet 28 is moved up and down in a state where the insertion portions 29 at both ends in the width direction are inserted into the insertion ports 3 of the left and right guide rails 1 by the rewinding rotation of the winding drum 19. The shielded part 2 is shielded when descending.
[0032]
In addition, a first weight body 30 in the width direction of the flame-retardant fireproof sheet body 28 that is landed on the floor surface 26 of the shielded part 2 is provided at the lower end of the flame-retardant fireproof sheet body 28. . The first weight body 30 is formed of a flame retardant weight body 31, and the first flame retardant weight body 31 is formed by folding back the lower end portion of the flame retardant fireproof sheet body 28. The cylindrical portion 32 and the rod-shaped material 33 having a predetermined weight inserted into the cylindrical portion 32 are formed.
[0033]
The first flame retardant weight body 31 is formed as an insertion portion 31a having both end portions inserted into the insertion ports 3 of the left and right guide rails 1 so as to be movable up and down. The ends are formed continuously with the outer ends of the insertion portions 29 at both ends in the width direction of the flame-retardant fireproof sheet body 28.
[0034]
In addition, when the flame retardant refractory sheet body 28 is rewound and the first weight body 30 is landed on the floor surface 26 of the shielded portion 2, the flame retardant refractory sheet body 28 is rewound. Further, a second weight body 34 in the width direction of the flame retardant fireproof sheet 28 is provided at a portion located in the guide path 8 of the guide body 5. The second weight body 34 has both end portions inserted into the guide path 8 of the guide body 5 and is engaged with the left and right stoppers 10 to be engaged and locked with the flame retardant fireproof sheet. The body 28 protrudes at both end portions in the width direction.
[0035]
The second weight body 34 is formed of a flame retardant weight body 36, and the second flame retardant weight body 36 includes a cylindrical portion 37 formed on the flame retardant fireproof sheet body 28. The rod-shaped member 38 having a predetermined weight inserted into the cylindrical portion 37 is formed.
[0036]
Next, the operation of the embodiment will be described.
[0037]
When shielding the shielded part 2, for example, when the motor 22 is actuated by a fire signal from the control means in the event of a fire that shields the shielded part 2, the winding shaft 20 is turned into the sheet body 27 by the output from the motor 22. That is, the flame-retardant fire-resistant sheet body 28 is driven and rotated in a direction to rewind, and the flame-retardant fire-resistant sheet body 28 is sequentially rewound from the winding drum 19 of the winding shaft 20, and the flame-retardant fire-resistant sheet body 28 The both insertion portions 29 are respectively guided and lowered along the insertion openings 3 of the left and right guide rails 1, and the first weight body 30 at the lower end portion of the flame retardant fireproof sheet body 28, that is, the first Both the insertion portions 31a of the flame-retardant weight body 31 are guided along the insertion openings 3 of the left and right guide rails 1 and are smoothly and rapidly lowered by the weight of the first flame-retardant weight body 31. Is done.
[0038]
Then, the first flame retardant weight body 31 at the lower end of the flame retardant refractory sheet body 28 (sheet body 27) is landed on the floor surface 26 of the shielded part 2 and the motor 22 is detected. The operation is stopped by the stop signal from the control means to which the detection signal is input, and the drive rotation of the winding drum 19 of the winding shaft 20 is stopped. This flame-retardant fireproof sheet body 28 and the first flame-retardant weight The shielded part 2 is entirely shielded by the body 31.
[0039]
At this time, even if the first flame retardant weight body 31 at the lower end of the flame retardant fire proof sheet body 28 is landed on the floor surface 26 of the shielded part 2, the flame retardant fire proof sheet body is removed from the winding drum 19. 28 is further rewound by a predetermined length, so that the second weight body 34, that is, the second flame retardant weight is obtained in a state where the first flame retardant weight body 31 is landed on the floor surface 26. Due to the weight of the weight body 36, the flame retardant fireproof sheet body 28 is pushed downward, and the lower part of the flame retardant fireproof sheet body 28 is deformed into a substantially wave-shaped state over a plurality of rows. A substantially wave-shaped elongated portion 39 is formed in the lower portion of the fire-resistant fired sheet body 28.
[0040]
And, the drive rotation of the winding drum 19 is stopped.At this time, when the winding drum 19 is not immediately stopped and further rotated by inertia in the direction of rewinding the flame retardant fireproof sheet body 28, That is, when the flame-retardant refractory sheet body 28 whose shielded part 2 is shielded by the winding drum 19 is wound in the reverse direction and wound up, the second flame refractory sheet body 28 provided above the flame-retardant refractory sheet body 28 is provided. The engaging portions 35 at both ends of the flame retardant weight body 36 are guided by the guide pieces 9 of the first guide pieces 6 of the guide bodies 5 on both sides and engaged with the stoppers 10 respectively.
[0041]
The stoppers 10 on both sides prevent the flame retardant fireproof sheet body 28 from being wound around the take-up drum 19 via the second flame retardant weight body 36, and this flame retardant. The first flame retardant weight body 31 at the lower end of the refractory fireproof sheet body 28 is held in a state of being landed on the floor surface 26.
[0042]
At this time, even if the flame-retardant refractory sheet body 28 whose shielded part 2 is shielded by the winding drum 19 is wound in the reverse direction and wound up somewhat, the flame-retardant refractory sheet body 28 extends in a plurality of rows below. As a result of the formation of the elongated portion 39 that has been deformed into a generally wave-like shape, the slack portion of the flame-retardant fireproof sheet 28 may be slightly stretched and pulled up. The flammable refractory sheet body 28 is prevented from being pulled up as a whole.
[0043]
Therefore, the first flame retardant weight body 31 at the lower end of the flame retardant fire proof sheet body 28 is not lifted upward from the floor surface 26 by the flame retardant fire proof sheet body 28, and the first It is possible to prevent a gap through which smoke, hot air, or the like flows between the flame retardant weight body 31 and the floor surface 26.
[0044]
The flame-retardant fireproof sheet 28 is heated by fire heat such as hot air in a state where the shielded part 2 is shielded by the flame-retardant fireproof sheet 28 and the first flame-resistant weight body 31. Even if this flame retardant refractory sheet body 28 contracts upward, the flame retardant refractory sheet body 28 is formed with an elongated portion 39 that is deformed into a substantially wave-shaped state at the bottom, The stretched portion 39 of the slack portion of the flame retardant fireproof sheet body 28 is extended to absorb heat shrinkage, and the flame retardant fireproof sheet body 28 is prevented from being pulled up as a whole.
[0045]
Accordingly, the first flame retardant weight body 31 is not lifted upward from the floor surface 26 by the flame retardant fireproof sheet body 28, and the first flame retardant weight body 31, the floor surface 26, It is possible to prevent the formation of a gap through which smoke, hot air or the like flows between the first flame retardant weight body 31 and the floor surface 26, and the air tightness between the first flame retardant weight body 31 and the floor surface 26 is reliably maintained. Smoke, hot air, etc. are reliably prevented from flowing out between the flame retardant weight body 31 and the floor surface 26. And the outflow of a hot air etc. is prevented toward the other side from the one side of the to-be-shielded part 2, and spreading | diffusion and spreading of smoke, such as a hot air, are prevented at the time of a fire.
[0046]
In addition, when the first flame retardant weight body 31 is rewound and the first flame retardant weight body 31 is landed on the floor surface 26, the first flame retardant weight body 31 is flame retardant. The lower end portion of the refractory fireproof sheet body 28 is prevented from being rolled up by hot air or the like.
[0047]
Further, when the flame retardant fireproof sheet body 28 is rewound and the first flame retardant weight body 31 is landed on the floor 26, the second flame retardancy of the flame retardant fireproof sheet body 28 is increased. The second flame retardancy in which the engaging portions 35 at both ends of the weight body 36 are respectively guided and inserted into the guide path 8, and the engaging portions 35 at both ends are inserted into the guide paths 8 on both sides. The weight body 36 reinforces the flame retardant fireproof sheet body 28 and bends to both ends of the flame retardant fireproof sheet body 28 so that both the insertion portions 29 are detached from the insertion openings 3 of the left and right guide rails 1. Is prevented.
[0048]
【The invention's effect】
According to the first aspect of the present invention, the first weight body at the lower end portion of the sheet body is landed on the floor surface of the shielded portion, whereby the shielded portion is formed by the sheet body and the first weight body. In this case, even if the first weight body at the lower end of the sheet body is landed on the floor surface of the shielded section, the sheet body is further rewound by a predetermined length from the winding drum. Thus, the sheet body is pushed downward by the weight of the second weight body in a state where the first weight body is landed on the floor surface, and the lower portion of the sheet body is slackened into a substantially wave shape. Transformed into
[0049]
Then, the drive rotation of the take-up drum is stopped. At this time, when the take-up drum is not immediately stopped and further rotated by inertia in the direction of rewinding the sheet body, that is, at the take-up drum. When the sheet body that shields the shielded part is wound in the reverse direction and wound up, the engaging parts at both ends of the second weight body provided on the upper part of the sheet body are used as stoppers for the guide bodies on both sides. Each of the stoppers is engaged, and the stoppers on both sides can reliably prevent the sheet body from being wound around the winding drum in the reverse winding state via the second weight body, and at the lower end of the sheet body It is possible to reliably hold the first weight body in a state where the first weight body is landed on the floor surface.
[0050]
At this time, even if the sheet body whose shielded part is shielded by the take-up drum is wound in the reverse direction and is slightly wound up, the lower part of the sheet body is deformed into a substantially wave-shaped state. Even if the slack portion of the sheet body is slightly stretched and pulled up, the sheet body is not pulled up as a whole, and smoke, hot air, etc. are generated between the first weight body and the floor surface. It is possible to reliably prevent a gap from flowing out.
[0051]
Therefore, when the sheet body is lowered and the shielded part is shielded, the first weight body can always be landed on the floor surface, and the first weight body can be lifted from the floor surface by this sheet body. Can be securely maintained and the airtightness between the first weight body and the floor surface can be reliably maintained, and smoke and hot air can be reliably prevented from flowing out between the first weight body and the floor surface. it can.
[0052]
According to the invention of claim 2, in addition to the effect of the invention of claim 1, when the sheet body is rewound and the first weight body is landed on the floor surface, the second weight of the sheet body is reduced. Engagement parts at both ends of the weight body are guided and inserted into the guide paths, respectively, and the sheet body is reinforced with a second weight body in which the engagement parts at both ends are inserted into the guide paths on both sides. can do.
[0053]
Further, when the sheet body whose shielded part is shielded by the winding drum is wound in the reverse direction and wound up, the engaging parts at both ends of the second weight body provided on the upper part of the sheet body are respectively The sheet body is guided by the guide pieces and securely engaged with the stoppers on both sides, and the stoppers on both sides can reliably prevent the sheet body from being wound around the take-up drum in the reverse winding and the sheet body. It is possible to reliably hold the first weight body at the lower end of the floor in a state where the first weight body is landed on the floor surface.
[0054]
According to the invention of claim 3, in addition to the effect of the invention of claim 1 or 2, in addition to the effect of the invention of claim 1 or 2, the flame retardant fireproof sheet body and the first flame retardant weight body in a state where the shielded portion is shielded Even if the flame-retardant fire-resistant sheet body is heated upward by fire heat such as hot air, the flame-resistant fire-resistant sheet body contracts upward, and the lower part of the flame-retardant fire-resistant sheet body is deformed into a substantially wave-like shape. As a result, the heat shrinkage is absorbed by the slack portion of the flame retardant fireproof sheet body, and it is possible to reliably prevent the flame retardant fireproof sheet body from being pulled up as a whole.
[0055]
Therefore, the first flame retardant weight body is not lifted upward from the floor surface by the flame retardant fireproof sheet body, so that smoke or smoke is not generated between the first flame retardant weight body and the floor surface. It is possible to reliably prevent the formation of gaps for hot air to flow out, prevent hot air from flowing out from one side of the shielded part to the other, and prevent the spread and spread of smoke such as hot air during a fire. A fireproof screen device can be provided.
[Brief description of the drawings]
FIG. 1 is a front view in which a part of a screen device showing an embodiment of the present invention is cut away.
FIG. 2 is a perspective view showing a state in which an engaging portion of a second weight body is engaged with the stopper.
FIG. 3 is a side view of the same screen device.
FIG. 4 is an explanatory side view showing a lowered state of the sheet body.
FIG. 5 is an explanatory side view showing a state in which the shielded portion is shielded by lowering the sheet body.
FIG. 6 is an explanatory side view showing a state in which the engaging portion of the second weight body is engaged with the stopper.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Guide rail 2 Covered part 3 Insertion slot 5 Guide body 6 1st guide piece 7 2nd guide piece 8 Guide path 9 Guide piece
10 Stopper
19 Winding drum
26 Floor
27 Sheet body
28 Flame retardant fireproof sheet
30 First weight body
31, 36 Flame retardant weight body
34 Second weight body
35 Engagement part

Claims (3)

A guide rail fixed relative to both sides of the shielded part and facing each other, and an insertion port formed in the vertical direction; a winding drum provided rotatably between the guide rails on both sides; and It is wound around the take-up drum so that it can be rewound freely, and at the time of rewinding, it is lowered with both end portions in the width direction inserted into the insertion openings of the guide rails on both side portions, and the lower end portion lands on the floor surface of the shielded portion. And a sheet body that shields the shielded part,
The sheet member is formed to have a length that is loosened when the shielded portion is shielded by being rewound from the winding drum, and is provided at a lower end portion of the sheet member and is landed on the floor surface of the shielded portion. A first weight body in the width direction of the sheet body, and projecting to both side end portions of the sheet body with both end portions as engaging portions provided at the upper portion of the sheet body, and when the first weight body is landed A second weight body in the width direction of the sheet body that loosens the sheet body,
The guide rails on the both side portions are provided on the guide rails to guide the engaging portions of the second weight body, and the guide rails are provided on the guide bodies at positions where the shielded portions are shielded. A stopper that engages the engaging portion of the second weight body and prevents the sheet body from being rolled up when the sheet drum is unwound and rotated by inertia of the take-up drum.
A screen device. The guide body is formed of a first guide piece and a second guide piece which are opposed to each other and which form a guide path which communicates with the insertion opening of the guide rail and guides the engaging portion of the second weight body. The stopper protrudes from the upper end of either the first guide piece or the second guide piece so as to expand and incline toward the take-up drum, and engages the engaging portion of the second weight body. Provided in the guide piece to guide,
The screen device according to claim 1. The sheet body is formed of a flame retardant fireproof sheet body, and the first weight body and the second weight body are formed of a flame retardant weight body,
The screen device according to claim 1, wherein the screen device is a screen device.

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