JP6489955B2 - Fire prevention structure of opening and closing body - Google Patents

Description

The present invention relates to a fire prevention structure for an opening / closing body, and more particularly to a fire prevention structure in an upper case above a building opening in an opening / closing body for opening / closing a building opening.

In the upper suspension type sliding door device, a door wheel provided on the upper end surface of the door body opens and closes the building opening by traveling on a rail extending in the opening width direction in the upper case. The upper part of the door body extends from a horizontally long opening formed in the lower surface of the upper case into the upper case, and at least a number between the door body and the opening of the upper case lower surface for opening / closing operation of the door body. Millimeter clearance is required.

An electric motor for opening and closing the door body is disposed in the upper case. The motor is integrated with a speed reducer, and the components including the speed reducer are housed in an aluminum housing. Yes. Lubricating oil is held in the reduction gear, but since the reduction gear is sealed in the housing, the lubricating oil does not leak out during normal operation.

However, if the housing melts and deforms due to heat during a fire or the like, the lubricating oil sealed inside may be scattered or dripped. If the lubricating oil leaking out of the housing is ignited, the flame may be exposed from the clearance of the lower surface of the upper case.

Also in an opening / closing body (for example, a shutter device) other than a sliding door device, a horizontally long opening is formed on the lower surface of the shutter case so that the shutter curtain can be opened and closed with clearance, and an electric motor is provided in the shutter case. Since a switch with a built-in speed reducer is arranged, the same problem may occur.

In Patent Document 1, in a door closer and hydraulic oil sealed in an aluminum casing, the hydraulic oil that has fallen as the casing melts due to heat at the time of a fire is collected with a scissors in the door body and collected in a tray. However, it does not deal with the occurrence of a fire in the upper case, the overall configuration is different, and there is no space in the upper case for collecting the dropped oil.
Patent No. 4951155

An object of the present invention is to secure fire prevention performance when a flame occurs in an upper case in an opening / closing body.

In the technical means adopted by the present invention, a horizontally long opening is formed on the lower surface of the upper case so that at least a portion of the door body can be opened and closed with a clearance.
In the upper case, there is a housing that houses a mechanical element that holds flammable oil.
A cover for covering the housing is provided in the upper case,
The cover is a fire prevention structure for an opening and closing body, which has a lower surface that covers a lower side of the housing and a side surface that rises from at least a part of the lower surface, stronger than the housing against heat during a fire.
In one aspect, the opening / closing body is a sliding door device, and the door body moves in the opening width direction in a state where the upper part of the door body is movably received with a clearance in the horizontally long opening. The opening / closing body is not limited to the sliding door device, and may be, for example, a shutter curtain. The door body (shutter curtain) moves in the vertical direction while passing through a horizontally long opening with clearance.
In one aspect, the mechanical element holding the combustible oil is a reduction gear integrated motor.
In one aspect, the housing is made of aluminum and the cover is made of steel.
In one aspect, the bottom surface of the cover is a horizontal surface and the side surface is a vertical surface, but the shape of the horizontal surface and the vertical surface of the cover is not limited to these, for example, from the bottom surface of the curved surface and the side surface of the curved surface A cross-sectional view arc shape may be sufficient. Moreover, the flammable oil which leaked can also be stored by forming a lower surface from a bulging curved surface below cross-sectional view. Moreover, the flammable oil which leaked can also be stored by forming a lower surface from two inclined surfaces which incline downward toward the center of a length direction. Furthermore, a downward inclined surface toward the center may be formed in a direction orthogonal to the length direction, and the lower surface may be formed substantially from four inclined surfaces.
In one aspect, the housing is located above the laterally long opening in the upper case.

In one aspect, when the cover is attached, the upper part of the housing is open, and the flame when the housing is ignited by the flammable oil that has melted or deformed and leaked is restricted upward. It is supposed to be.
By enclosing the lower surface and the periphery of the housing, the flame is confined and restricted upward.
The enclosure around the housing is at least partially performed by the side surface of the cover, but may be partially performed by an element (a bracket or a support frame) other than the cover, as will be described later.
In the embodiment shown in FIGS. 9 and 10 described later, the side surface rising from at least a part of the lower surface is the side surface (91).
In the embodiment shown in FIG. 11 described later, the side surfaces rising from at least a part of the lower surface are the side surface (91) and the rising side (900, 901).
In the embodiment shown in FIG. 12 described later, the side surfaces rising from at least a part of the lower surface are the side surface (91) and the raised portion. The raised portion is formed by the expanded thermal expansion refractory member.

In one aspect, the housing is supported by the left and right brackets via vibration isolation elements at both ends in the length direction,
The cover is fixed to the bracket with the housing covered in a non-contact state.
In the case where the housing housing the motor is supported by the bracket via the vibration isolation element, the cover is fixed to the bracket in a non-contact state with the housing, so that the cover does not contact the housing and the vibration isolation element. Does not interfere with the anti-vibration effect.

In one aspect, the opening / closing body is a suspended sliding door device,
With the cover mounted, the lower surface of the cover is positioned in close contact with the lower surface of the housing in a non-contact state, and the side surface of the cover is in a non-contact state on one side surface of the housing. It is located in close proximity,
The bracket is located opposite to both ends of the housing in the longitudinal direction,
On the other side surface of the housing, a support frame forming a rail is located facing the housing.
In one aspect, the lower side of the lower surface of the cover is a traveling path of a door wheel that travels on the rail, and the cover uses an existing element (a bracket for attaching the housing) with respect to an existing housing. And it can be retrofitted without changing the existing configuration.

According to the present invention, even when the housing melts due to heat at the time of fire and the internal oil leaks out, the oil splash can be kept inside the cover, and the oil splash range is limited. Therefore, it is possible to reduce the probability of ignition of the oil, and even if the oil is ignited, it is possible to limit the exposure of the flame to the outside through the clearance of the lower surface of the upper case. Can be secured.

By enclosing the lower surface and the periphery of the housing (the side of the cover, brackets and support frame) and opening the top, the flame can be restricted upward even if oil is ignited. Further, the exposure of the flame to the outside can be restricted from the clearance of the lower surface of the upper case, so that the fire prevention performance can be ensured.

It is the front view which looked at the sliding door device (fully closed state) concerning this embodiment from the indoor side. It is a side view which shows the inside of the upper case of the sliding door apparatus which concerns on this embodiment. It is a front view which shows the inside of the upper case of the sliding door apparatus which concerns on this embodiment. It is a figure which shows the bracket which supports the motor which concerns on this embodiment, and the said motor. It is a figure which shows the state in which the cover was attached to the motor shown in FIG. It is a figure which shows the state in which the cover was attached to the motor shown in FIG. It is a figure which shows a bracket. It is a figure which shows a vibration-proof rubber. It is sectional drawing of a cover. It is a top view of a cover, a front view, and a bottom view. It is a figure which shows the cover which concerns on other embodiment. It is a figure which shows the cover which concerns on other embodiment.

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view of the sliding door device (fully closed state) according to the present embodiment as viewed from the indoor side, and the sliding door device includes a door end side vertical frame 1, a door bottom side vertical frame 2, and an upper case. 3, a lower frame 4, a frame portion formed in the width direction (opening width direction) of the frame portion, a vertical rectangular fixed panel 5 provided in a door bottom side half, and a width direction door end side half And a vertically rectangular door body 6 for opening and closing a building opening formed in the section.

The upper case 3 is a box-like body that extends in the opening width direction as a whole, and a drive mechanism 7 for the door body 6 is accommodated in the internal space. A horizontally long opening extending in the opening width direction is formed on the lower surface of the upper case 3, and the lower surface is divided into an outdoor portion 30 and an indoor portion 31 across the horizontally long opening. On the outdoor side portion 30 and the indoor side portion 31, rising edges 300 and 310 are formed facing the horizontally long openings, respectively. The upper end portion of the door body 6 extends into the upper case 3 through a horizontally long opening, and a clearance C that allows the movement of the door body 6 is formed between the rising edges 300 and 310 and the door body 6. Has been.

A flame flow resistance member 60 is fixed to the upper end surface of the door body 6 so as to delay the flow of smoke passing through the clearance C and the surroundings of the flame. The flame flow resistance member 60 extends in the width direction (opening width direction) of the door body 6, and extends in the first extension portion extending beyond the outdoor side surface portion of the door body 6 and the indoor side surface portion of the door body. 2 includes an upper surface 600 provided with an extending portion, an outdoor hanging side 601 that is spaced and opposed to the outdoor side surface portion of the door body 6, and an indoor side hanging side 602 that is spaced and opposed to the indoor side surface portion of the door body 6.

The indoor side portion of the upper case 3 is formed of an inspection cover 3A, and the upper case 3 includes a case main body and an inspection cover 3A that is rotatably attached to the case main body (the indoor side portion 31 on the lower surface, the rising side). Side 310 is a part of inspection cover 3A). By opening the inspection cover 3A, the internal space of the upper case 3 is exposed, and maintenance of the drive mechanism 7 is possible. The inspection cover may be detachable from the case body instead of being rotatable with respect to the case body.

The door body 6 is a suspended sliding door, and a door wheel 61 is provided on the upper end surface. The door wheel 61 on the door end side is a driven door wheel, and the door wheel 61 on the door edge side is a driving door wheel. The door wheel 61 is placed on a rail 62 that is positioned in the lower part of the internal space of the upper case 3 and extends in the opening width direction. The door body 6 rolls on the rail 62 so that the door body 6 opens and closes. To do.

The drive mechanism 7 includes an electric motor 70, a drive side sprocket 71, a driven side sprocket 72, a drive side sprocket 71, and a drive chain 73 wound around the driven side sprocket 72. As shown in FIG. 3, the internal space of the upper case 3 includes a door bottom side half located above the fixed panel 5 and a door tip located above the building opening (door 6 in the fully closed position). The electric motor 70 and the drive side sprocket 71 are located in the door end side half, the driven side sprocket 72 is located in the door bottom side half, and the drive chain 73 is It extends over the front half and the door bottom half. At normal times, the drive chain 72 is moved via the drive-side sprocket 71 by forward and reverse rotation of the electric motor 70 and the door wheel 61 rolls on the rail 62, so that the door body 6 moves on the rail 62 and opens. Open and close parts.

The drive mechanism further includes a self-closing device 74. When a fire occurs in an open state (including full open and half open), the self-close device 74 operates to close the door body 6 in the closing direction. To the fully closed state. Such a self-closing device (having a biasing means in the closing direction of the door body, which normally restricts movement in the closing direction by the biasing means and releases the regulation in the event of a fire, etc.) Since it is well-known in the trader, detailed description is abbreviate | omitted.

The electric motor 70 is a reduction gear integrated motor, and the output from the motor main body 70A is transmitted to the drive-side sprocket 71 via the reduction gear 70B. The motor body 70A and the speed reducer 70B are housed in an aluminum housing 700, and flammable lubricating oil or grease supplied to the speed reducer 70B is sealed in the housing 700. The drive side sprocket 71 is located outside the housing 700. The housing 700 is disposed in a posture that extends horizontally in the opening width direction, and plate-like pieces 701 are projected from both ends in the length direction.

The housing 700 is supported by the bracket 8 via plate-like pieces 701 at both ends in the length direction. As shown in FIG. 7, the bracket 8 extends perpendicularly to the first surface portion 80, the second surface portion 81 extending perpendicularly to the first surface portion 80, and the first surface portion 80 and the second surface portion 81. A third surface portion 82. In FIG. 7, the bracket 8 that supports one of the lengths of the housing 700 is shown. However, the bracket 8 that supports the other of the lengths of the housing 700 is bilaterally symmetric and has the same basic configuration. A steel cover 9 is provided so as to cover the housing 700 from below. In this embodiment, the cover 9 is fixed to the left and right brackets 8 so as to cover the housing 700 in a non-contact state.

The bracket 8 is fixed to the support frame 10 that forms the rail 62. As shown in FIG. 2, the support frame 10 has an L shape in sectional view from a horizontal portion 100 where the rails 62 are formed and a vertical rising portion 101, and is formed in the upper half of the rising portion 101. The fixed plate 102 is provided in a vertical posture. An insertion hole 800 is formed in the first surface portion 80, and the bracket 8 is fixed to the fixed plate 102 with screws 103 with the first surface portion 80 facing the fixed plate 102.

In the present embodiment, the second surface portion 81 of the bracket 8 is in a vertical posture when the bracket 8 is attached to the fixed plate 102 and is orthogonal to the protruding direction of the plate-like piece 701 of the housing 700. It extends like so. A vertical hole 810 is formed in the second surface portion 81, and a vibration isolation element 83 is attached to the vertical hole 810.

As shown in FIG. 8, the vibration isolation element 83 includes an insertion portion 830 into the vertically long hole 810, a contact portion 831 having an outer shape larger than the vertically long hole 810, and a plate provided on the outer surface of the contact portion 831. 832, an insertion portion 830, a contact portion 831, a narrow insertion hole 833 formed through the plate 832, and a guide and retaining projection 834 formed on the outer surface of the insertion portion 830. The insertion portion 830, the abutting portion 831 and the guide protrusion 834 are made of rubber, and the vibration isolation element 83 is a vibration isolation rubber. The anti-vibration element 83 is attached to the second surface portion 81 of the bracket 8 by inserting the insertion portion 830 into the vertically long hole 810 of the second surface portion 81 of the bracket 8 so that the projection 834 is hooked on the second surface portion 81. The The housing 700 is supported between the left and right brackets 8 via the anti-vibration element 83 by inserting the plate-like piece 701 into the insertion hole 833 of the anti-vibration element 83 attached to the second surface portion 81 of the bracket 8. . Since the housing 700 is supported by the bracket 8 via the vibration isolation element 83, the vibration of the electric motor 70 is suppressed from being transmitted to the bracket 8 and the elements connected to the bracket 8.

In the present embodiment, the third surface portion 82 of the bracket 8 is in a horizontal posture when the bracket 8 is mounted. A screw hole 820 for a screw 924 that fixes the cover 9 is formed in the third surface portion 82.

The cover 9 extends in the length direction along the housing 700 of the motor 70, and has a U-shaped cross-sectional view from a horizontally extending lower surface 90, a vertically extending side surface 91, and a horizontally extending upper surface 92. It has.

The lower surface 90 of the cover 9 is a rectangle having a predetermined length dimension and a predetermined width dimension. The length dimension is larger than the length of the housing 700 (excluding the plate-like piece 701), and the width dimension is that of the housing 700. It is larger than the width and has a size and area that covers the entire housing 700 from below. With the cover 9 attached, the lower surface 90 is close to the lower surface of the housing 700 in a non-contact state. A travel route of the door wheel 61 is located immediately below the lower surface 90 of the cover 9.

The side surface 91 of the cover 9 is a rectangle having the same length dimension as the lower surface 90 and a predetermined height dimension. The length dimension is larger than the length of the housing 700 (excluding the plate-like piece 701), and the height dimension. Is larger than the overall height of the housing 700 and has a size and area so as to cover the entire interior surface of the housing 700. A circular opening 910 into which the drive-side sprocket 71 can be inserted is formed at one end in the length direction of the side surface 91 (door bottom side). The drive-side sprocket 71 is positioned outside and the housing 700 is covered with the cover 9. It is possible to cover. In a state in which the cover 9 is mounted, the side surface 91 is close to the side surface of the housing 700, and the drive side sprocket 71 is located outside the side surface 91. By positioning the drive-side sprocket 71 outside the cover 9, the drive chain 73 can be easily adjusted (compared to the case where the drive-side bracket is covered with a cover).

The upper surface 92 includes a narrow portion 920 that extends in the length direction of the cover 9 and mounting sides that are L-shaped in plan view and are integrally formed at both ends of the narrow portion 920 in the length direction. The mounting side includes a first portion (smaller than the width dimension of the lower surface 90) 921 extending in the width direction (a direction perpendicular to the length direction), and a first portion 921 extending beyond the lower surface 90 and the edge of the side surface 91. The second portion 922 is formed with a groove portion 923 located outside the lower surface 90 and the side surface 91. The length dimension of the upper surface 92 is larger than the length dimension of the lower surface 90 and the side surface 91. The upper surface 92 mainly functions as a mounting piece, and most of the upper surface 92 has an opening shape so that the upper surface of the housing 700 is exposed.

The cover 9 has the lower surface 90 in close proximity to the lower surface of the housing 700 and the side surface 91 in close proximity to the side surface of the housing 700 so that the second portion 922 of the upper surface 92 is superimposed on the third surface portion 82 of the bracket 8. The screw 924 is screwed into the screw hole 820 of the third surface portion 82 exposed in the groove portion 823, thereby being attached to the housing 700 and the vibration isolation element 83 in a non-contact state.

In the present embodiment, with the cover 9 attached, the lower surface of the housing 700 and the side surface on the indoor side are covered with the lower surface 90 and the side surface 91, respectively, and most of the upper surface of the housing 700 is exposed. By exposing a part of the housing part 700 without sealing the entire housing 700 with the cover 9, the heat of the motor 70 can be dissipated well. Both the outdoor portion of the cover 9 and both end portions in the length direction are open, but the rising portion 101 of the support frame 10 is located opposite to the side surface of the housing 700 on the outdoor side, The second surface portion 81 of the bracket 8 is positioned on both end surfaces of the housing 700 in the length direction, and it suppresses the scattering of the lubricating oil, and even if a flame is generated, as a resistance element against the flow of the flame Function.

When a fire occurs in the upper case 3, the aluminum housing 700 is melted by being exposed to the heat of the fire, and the lubricating oil adhering to the gear and the like of the speed reducer 70 </ b> B leaks out of the housing 700. there is a possibility. Since the leaked lubricating oil is considered to be directed downward due to gravity, it will remain in the cover 9 having the lower surface 90 and the side surface 91, and further scattering is prevented. The probability of ignition of oil can be lowered.

The housing 700 has a bottom surface and a front surface (a side surface on the indoor side) surrounded by a lower surface 90 and a side surface 91 of the cover 9, and a left end surface and a right end surface are surrounded by the second surface portion 81 of the left and right brackets 8. Since the side surface is surrounded by the rising portion 101 of the support frame 10 and only the upper surface is opened, even if the lubricating oil in the cover 9 is ignited, the lower surface 90, the side surface 91, and the left and right By confining the flame in the space surrounded by the second surface portion 81 and the rising portion 101, the flame can be restricted in the upward direction, so that it does not leak from the clearance C on the lower surface of the upper case 3 and ensures fire prevention performance. can do.

Another embodiment of the cover 9 is shown in FIG. Only the points different from the above-described cover 9 shown in FIGS. 9 and 10 will be described, and the above description is incorporated for other points. Rising edges 900 and 901 are formed at the edge of the lower surface 90 of the cover 9. More specifically, a side surface 91 is formed on the indoor side edge (long side) of the rectangular lower surface 90, and a rising side 900 is formed on the outdoor side edge (long side). Rising edges 901 are formed at both end edges (short sides) in the width direction.

The rising portion 101 of the support frame 10 is located on the side of the outside of the housing 700, and the brackets 8 are located at both ends in the longitudinal direction of the housing 700. Since there is a gap between them, it is possible to more reliably prevent the flame from going downward from the gap by forming the rising edge. Further, the rising edges 900 and 901 prevent the lubricating oil falling on the lower surface 90 from falling from the edge of the lower surface 90.

Another embodiment of the cover 9 is shown in FIG. Only the points different from the above-described cover 9 shown in FIGS. 9 and 10 will be described, and the above description is incorporated for other points. A thermal expansion refractory member 93 is provided on the lower surface 90 along the edge. More specifically, a long belt-like thermal expansion and fire-resistant member 93 is provided along the outdoor side edge (long side) of the rectangular lower surface 90, and along both end edges (short side) in the opening width direction. Thus, a short belt-like thermal expansion refractory member 93 is provided. The thermal expansion refractory member 93 is a member that expands by foaming when heated to a temperature of 150 ° C. to 250 ° C., for example. As the thermal expansion refractory member 93, for example, Fiblock (registered trademark) of Sekisui Chemical Co., Ltd. can be used. In this embodiment, the thermal expansion fireproof member 93 made of a sheet piece is fixed by an adhesive tape. These thermal expansion refractory members 93 expand due to heat at the time of a fire, and form a raised portion at the edge of the lower surface 90.

The rising portion 101 of the support frame 10 is located on the side of the outside of the housing 700, and the brackets 8 are located at both ends in the longitudinal direction of the housing 700. Since there is a gap between them, it is possible to more reliably prevent the flame from going downward from the gap by forming the raised portion. Further, the raised portion prevents the lubricating oil falling on the lower surface 90 from falling from the edge of the lower surface 90. The thermal expansion refractory member 93 may be raised along the rising sides 900 and 901 using the rising sides 900 and 901 as a guide by providing the thermal expansion refractory member 93 in the embodiment of FIG.

3 Upper case 6 Door body 62 Rail 70 Motor 70A Motor body 70B Reducer 700 Housing 8 Bracket 83 Anti-vibration element 9 Cover 90 Lower surface 91 Side surface 10 Support frame C Clearance

Claims (4)

On the lower surface of the upper case, a horizontally long opening is formed in which at least a portion of the door body can be opened and closed with a clearance,
In the upper case, there is a housing that houses a mechanical element that holds flammable oil.
A cover for covering the housing is provided in the upper case,
The cover is a fireproof structure for an opening and closing body, which has a lower surface that covers the lower side of the housing and a side surface that rises from at least a part of the lower surface, stronger than the housing against heat during a fire. In the state where the cover is mounted, the upper part of the housing is open, and the flame when the housing ignites flammable oil that has melted or deformed and leaked is restricted upward. Yes,
The fire-proof structure of the opening-closing body of Claim 1. The housing is supported by the left and right brackets via vibration isolation elements at both ends in the length direction,
The cover is fixed to the bracket in a state of covering the housing in a non-contact state.
The fire-proof structure of the opening-closing body of any one of Claim 1,2. The opening / closing body is a suspended sliding door device,
With the cover mounted, the lower surface of the cover is positioned in close contact with the lower surface of the housing in a non-contact state, and the side surface of the cover is in a non-contact state on one side surface of the housing. It is located in close proximity,
The bracket is located opposite to both ends of the housing in the longitudinal direction,
On the other side surface of the housing, a support frame that forms a rail is positioned oppositely,
The fire-proof structure of the opening-closing body of Claim 3.

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