JP6749204B2 - Shutter device - Google Patents

Description

The present invention relates to a shutter device capable of blocking an outdoor side of an opening provided with a window or door of a building.

2. Description of the Related Art Conventionally, in a shutter device provided above an opening such as a window or door of a building, a large amount of resin parts are used inside a winding shaft capable of winding a slat curtain, an electric motor, or the like. In the event of a fire, these resin parts may generate flammable gas in a high temperature atmosphere, so heated foam materials are installed in the shutter case and winding shaft to ensure fire protection.
For example, when the shutter is fully closed, one slat is left unwound on the outer peripheral surface of the winding shaft, and the winding shaft is covered with one slat. A thermally expansive refractory material is attached to the inside of this slat to seal the flammable gas generated inside the slat due to thermal expansion, but this structure seals the flammable gas in the unslatted slat. Because of this structure, the sealing is insufficient and flammable gas leaks from the winding shaft.

On the other hand, a recent shutter device has a structure in which all the slats are paid out when the shutter is fully closed, as described in Patent Document 1, for example. In this shutter device, the winding shaft capable of winding the slat has a fixed shaft portion provided with the first member and the second member at both ends, and a tubular rotation shaft portion covering these. A fixed shaft portion housing the electric motor is connected to the rotary shaft portion via a power transmission support portion of a clutch provided outside the first member, and a biasing member is provided on the second member. The rotating shaft portion is rotatable via a power transmission support portion that interlocks with the electric motor of the first member.

Then, a plurality of heat-foaming materials are arranged on the outer peripheral surface of the first member provided on one end side of the fixed shaft portion, and further, the heat-foaming material is arranged also on the end portion of the fixed shaft portion and the side member of the shutter box which receives the heat foam material. doing. Further, a plurality of heat-foamable materials are also arranged on the second member provided on the other end of the fixed shaft portion.
Therefore, when a fire occurs, the heat-foamed material provided on each of the first member side and the second member side thermally expands, and the outer end portion of the winding shaft, between the first member and the rotating shaft portion, and the second member and A space between the rotary shaft portion and each of the rotary shaft portions is covered with a heated foam material. This prevents the flammable gas generated in the rotary shaft of the winding shaft from flowing out.

JP, 2005-68024, A

However, in the shutter device described in Patent Document 1 described above, a heating foam material is provided in the electric motor portion of the first member of the fixed shaft portion to seal the gap between the rotary shaft portion and one end of the winding shaft. At the same time, the second member is also provided with a heat-foaming material to seal the gap with the rotating shaft and the other end of the winding shaft. Therefore, it has been necessary to install a large amount of heat-foamed material in a large number of locations inside the rotary shaft and on the side surface member of the shutter box. Therefore, there are drawbacks that the cost is high and the manufacturing is time-consuming.

The present invention has been made in view of the above problems, and reduces the manufacturing cost by reducing the installation location of the heated foam material, and prevents the outflow of flammable gas from the take-up shaft during a fire to prevent fire. It is an object of the present invention to provide a shutter device having improved performance.

A shutter device according to the present invention is a shutter device in which a shutter surface capable of opening and closing an opening can be wound around a winding shaft, an electric motor provided in the winding shaft, and a power transmission member attached to the electric motor. It is characterized by comprising a first heated foam material provided at a connection portion of the electric motor and the power transmission member, and a metal covering member surrounding the connection portion of the electric motor and the power transmission member.
According to the present invention, when a fire or the like occurs, the first heat-foamed material thermally expands to seal the connection portion between the electric motor and the power transmission member, and from the gap between the connection portion between the electric motor and the power transmission member. Combustible gas and expanded heated foam that are about to leak to the outside can be blocked by the metal coating member, and can be confined and sealed in the electric motor and the metal coating member.

The first heated foam material is preferably installed between the output shaft of the electric motor and the fitting receiving portion of the power transmission member that fits the output shaft.
It is possible to prevent the flammable gas and the heated foam material from leaking out from the gap between the electric motor and the fitting reception portion by thermal expansion of the first heated foam material to seal the electric motor with the fitting reception portion.

Further, it is preferable to provide a second heated foam material that surrounds the outer peripheral side of the power transmission member.
Since the outer peripheral side of the power transmission member is surrounded by the second heating foam material, even if combustible gas is generated from the power transmission member due to a fire or the like, it is sealed by the thermal expansion of the second heating foam material to prevent outflow of the flammable gas. Can be stopped.

Further, the end of the winding shaft on the side where the electric motor is housed is supported by the support portion on the side surface of the shutter case that houses the winding shaft, and the third heating foam material is attached to the support portion or the end of the electric motor. It may be provided.
The end portion of the electric motor is sealed by thermal expansion of the third heating foam material provided on the end portion of the electric motor or the side surface support portion of the shutter case, while the other end portion is covered with the first heating foam material. Since it is installed and sealed by thermal expansion, both ends of the electric motor can be sealed, there is no need to install heating foam inside the winding shaft, and heating foam can be installed in few places. Outflow of flammable gas can be prevented.

According to the shutter device of the present invention, it is possible to seal the combustible gas by providing the first heating foam material between the power transmission member and the output shaft of the electric motor near the source of the combustible gas in the winding shaft. At the same time, the metal coating member surrounding the connecting portion of the electric motor and the power transmission member can prevent the flammable gas and the heated foam material from leaking to the outside. Therefore, the fireproof performance can be improved and the manufacturing cost can be reduced by using the heat-foaming material in a small number of installation places.

FIG. 3 is a vertical cross-sectional view of a shutter device according to an embodiment of the present invention. It is an exploded perspective view of a shutter case. It is a principal part transparent perspective view of a winding shaft. It is a side view of the electric motor part in the winding shaft shown in FIG. It is an expanded sectional view of the connection structure of the electric motor and clutch of the winding shaft shown in FIG. (A), (b), (c) is a figure which shows the connection process of the electric motor of a winding shaft, and a clutch. It is a perspective view which shows the connection structure of the electric motor of a winding shaft, and a clutch.

Hereinafter, a shutter device according to an embodiment of the present invention will be described with reference to FIGS. 1 to 7.
As shown in FIGS. 1 and 2, the shutter device 1 according to the present embodiment is an electric shutter device, for example, a box type is provided on an upper portion of a quadrangular frame-shaped frame part 3 in an opening 2 of a building forming windows, doors, and the like. The shutter case 4 of is attached. The frame portion 3 has an upper frame and a lower frame, and left and right vertical frames 5 fixed to the opening 2, and has, for example, an internal shoji and an external shoji installed therein.
A winding shaft 6 is rotatably mounted in the shutter case 4, and by rotation of the winding shaft 6, for example, a slat curtain 9 in which steel slats 8 are vertically arranged can be wound and unwound. There is. The vertical frame 5 of the frame part 3 is provided with guide rails 5a for guiding the elevating and lowering of the slat curtain 9 outside the inner and outer shoji of the opening 2.

The shutter case 4 is connected to the frame portion 3 and fixed to the outer wall at the upper portion of the opening 2. The shutter case 4 is composed of a side cover 11 forming side surfaces on both sides, a main body cover 12 on the back side, and a front cover 13 including a ceiling cover portion. Inside the shutter case 4, there are provided supporting portions 14 (only one supporting portion 14 is shown in FIG. 2) for supporting both ends of the winding shaft 6 on both side covers 11.
The support portion 14 is formed with a support fixing portion 14a that fixes and supports one end of the winding shaft 6. The uppermost slat 8 of the plurality of slats 8 constituting the slat curtain 9 is fixed to the winding shaft 6. The slat curtain 9 opens the opening 2 by being wound around the winding shaft 6, and closes the opening 2 by being fed from the winding shaft 6 to, for example, the uppermost slat 8.

As shown in FIG. 3, the winding shaft 6 extends in the longitudinal direction (finding direction) and rotates in the forward and reverse directions to wind up the slat curtain 9, and the cylindrical rotating shaft 15 and the inside of the rotating shaft 15. And a cylindrical fixed shaft portion 16 which is disposed on the rotation axis line and rotatably supports the rotation shaft body 15. Further, an electric motor 18 for rotating the rotary shaft body 15 in forward and reverse directions is provided on one end side inside the rotary shaft body 15 opposite to the fixed shaft portion 16. A spring set 17 mounted on the fixed shaft portion 16 is installed on the other end side of the rotating shaft body 15.
The rotating shaft body 15 is formed in a tubular shape with both axial end portions 15a and 15b open, and is made of metal such as steel. The uppermost slat 8 of the slat curtain 9 is fixed to the outer peripheral surface of the rotary shaft body 15 via a spacer 19. A plurality of spacers 19, for example, three spacers 19 are installed at a predetermined interval along the longitudinal direction of the rotary shaft body 15, and two spacers 19 are screwed together to a first drum 21A and a second drum 21B described later. .. The remaining spacer 19 is sandwiched through a hole 15c formed in the rotary shaft 15 and is screwed together with the nut 20 and the hole closing piece.

One end 16 a of the fixed shaft portion 16 projects from one end 15 a of the rotary shaft body 15, and the other end portion 16 b is inserted into the rotary shaft body 15 and extends toward the inner center side. The spring set 17 is arranged between the pair of first and second drums 21A and 21B rotatably supported by the fixed shaft portion 16 with a predetermined space in the axial direction, and between the first and second drums 21A and 21B. And a coil-shaped spring 22 in which the fixed shaft portion 16 is inserted.

Of the pair of first and second drums 21A and 21B, the first drum 21A is integrally formed with the spacer 19 inside the rotary shaft body 15 near one end 15a of the rotary shaft body 15 by a fixture such as a screw. It is fixed. The second drum 21B is fixed to the rotating shaft body 15 integrally with the spacer 19 by a fixing tool such as a screw at a position near the other end 16b of the fixed shaft portion 16 near the center of the inside of the rotating shaft body 15.
The spring 22 has one end 22a connected to the fixed shaft portion 16 and the other end 22b connected to the second drum 21B. Further, the spring 22 is configured such that the biasing force is increased or decreased by the rotation of the rotary shaft body 15, and this biasing force is used for opening and closing the slat curtain 9.

3 and 4, the electric motor 18 has a substantially cylindrical electric motor main body 24 that rotates the rotary shaft body 15 by rotational driving, and one end of the electric motor main body 24 is outside the end portion 15b of the rotary shaft body 15. And a motor head 25 protruding to the outside. The outer peripheral surface of the motor head 25 has a concave-convex shape, and the motor head 25 is fitted to the support fixing portion 14a having the concave-convex portion formed on the outer peripheral surface of the supporting portion 14 provided on the side cover 11 of the shutter case 4 shown in FIG. It is fixedly held.
A crown 21C is rotatably supported inside the motor head 25 on the outer peripheral surface of the electric motor body 24. The crown 21C is installed inside the rotary shaft body 15 in the vicinity of the end portion 15b, and is fixed to the rotary shaft body 15 with a fixture such as a screw.

As shown in FIGS. 3 to 5, a clutch 26 is connected to the other end of the electric motor body 24. An output shaft 28 made of resin, for example, is fixed to the other end of the electric motor body 24. The clutch 26 that can be fitted to the output shaft 28 is made of resin, for example, and a power transmission unit 30 having an enlarged diameter is formed at an end of the clutch body 29 on the output shaft 28 side, and the electric motor 18 of the power transmission unit 30 is formed. A concave portion 30a is formed on the side surface. The power transmission unit 30 has, for example, flat notches formed on both sides of a disk shape.
A fitting receiving portion 31 made of metal, for example, aluminum die casting, is fitted and fixed to the recessed portion 30a of the power transmission portion 30. The output shaft 28 is fitted and connected in the recess 31a of the fitting receiving portion 31, and the driving force of the electric motor 18 can be transmitted. The clutch wire 32 connected to the clutch body 29 extends into the fixed shaft portion 16.

Moreover, as shown in FIG. 5, a space is formed between the bottom of the recess 31a of the fitting receiving portion 31 in the fitted state and the output shaft 28, and the first heating foam material 33 is fixed in this space. ing. 5 and 6, a fitting pipe 34 made of metal, for example, aluminum alloy, fitted to the outer peripheral surface of the electric motor main body 24 in a fitted state of the output shaft 28 and the fitting receiving portion 31 of the clutch 26 is provided. It is possible to slide it and bring it into contact with the power transmission part 30 in the form of the expanded diameter plate to close the gap between the output shaft 28 of the electric motor body 24 and the fitting receiving part 31.
Therefore, the output shaft 28 of the electric motor 18 and the first heating foam material 33 are configured to be covered with a double metal member composed of the fitting receiving portion 31 and the fitting pipe 34 provided outside the fitting receiving portion 31. The sealing property of the heat-expandable material and the volatile gas is high.

As shown in FIG. 6, when the fitting pipe 34 is fitted into the fitting receiving portion 31, the claw portion 31 b formed on the outer peripheral surface of the fitting receiving portion 31 is inserted into the hole 34 a formed in the fitting pipe 34. The fitting pipe 34 can be positioned by fitting. In this state, the fitting receiving portion 31 and the fitting receiving portion 31 can be fixed with a fixing tool such as a screw through the hole 34a formed in the fitting pipe 34.
Since the electric motor 18 includes a combustible member such as a resin component inside, the combustible gas is generated from the electric motor 18 heated by a fire or the like. At this time, the first heating foam material 33 seals the inside of the output shaft 28 and the electric motor body 24, which are thermally expanded and melted, and the heating is performed by expanding the combustible gas from the gap between the output shaft 28 and the fitting receiving portion 31. The fitting pipe 34 prevents the foam material from blowing out.

In the clutch 26 shown in FIGS. 4 and 5, the resin clutch main body portion 29 is surrounded by the second heating foam material 36 formed in a substantially cylindrical shape. The tip portion of the second heat-foamable material 36 is formed into a thin stepped portion 36a, and this stepped portion 36a is fitted into the cutout surface of the power transmission portion 30 and is fixed with a fixing tool such as a screw.
Therefore, it is possible to seal the clutch 26 that melts when the second heat-foamed material 36 heat-foams due to a fire or the like, and the combustible gas in the electric motor 18 together with the first heat-foamed material 33 causes the spring set in the rotating shaft body 15. It can be prevented from flowing to the 17 side.
When the electric motor 18 is rotationally driven, the driving force can be transmitted from the output shaft 28 to the rotary shaft body 15 via the power transmission unit 30 of the clutch 26 to rotate the rotary shaft body 15. Further, when the electric motor 18 is not driven due to a power failure or the like, the rotating shaft body 15 can be manually rotated.

In addition, in FIG. 2, the motor head 25 provided on the electric motor 18 side of the rotary shaft body 15 is fitted to the support portion 14 provided on the side cover 11 of the shutter case 4. A concave groove 38 is formed at a position of the side cover 11 facing the rotary shaft body 15, and a third heated foam material 39 is fixed in the concave groove 38. Alternatively, instead of the groove 38, the third heated foam material 39 may be attached to the outer surface of the motor head 25.
In the shutter device 1 of the present embodiment, the third heating foam material 39 is installed in the concave groove 38 of the support portion 14 of the side cover 11 that supports the motor head 25 that is the one end portion side of the electric motor 18, and the clutch on the opposite side is provided. A first heated foam material 33 and a second heated foam material 36 were installed on the No. 26. Therefore, even if flammable gas is generated from the inside of the electric motor 18, it can be sandwiched and sealed by the third heating foam material 39, the first heating foam material 33, and the second heating foam material 36. In addition, although each heating foam material 33, 36, 39 can use an appropriate material, for example, an epoxy resin can be used.

The shutter device 1 according to the present embodiment has the above-described configuration. Next, a method of assembling the electric motor 18 portion of the winding shaft 6 will be described with reference to FIGS. 6 and 7.
In FIG. 6A, the fitting receiving portion 31 made of aluminum die casting is fitted into the concave portion 30a formed in the power transmission portion 30 of the clutch 26. Then, the first heat-foamable material 33 is fixed to the space formed at the bottom of the recess 31a of the fitting receiving portion 31. In FIG. 6B, the output shaft 28 of the electric motor main body 24 of the electric motor 18 is opposed to the fitting receiving portion 31 of the clutch 26, and the markings provided in advance on the fitting receiving portion 31 and the output shaft 28 are marked with each other. Align and fit each other.

Next, the fitting pipe 34, through which the electric motor main body 24 is inserted, is slid so that the hole 34 a is engaged with the claw portion 31 b formed on the fitting receiving portion 31 of the clutch 26 and brought into contact with the power transmission portion 30. Let Then, in FIG. 6C, a screw is inserted through the hole 34 a of the fitting pipe 34 and fixed to the fitting receiving portion 31.
Next, the electric motor 18 with the clutch 26 is inserted into the cylindrical rotary shaft body 15 of the winding shaft 6 to screw the crown 21C and the power transmission unit 30 to the rotary shaft body 15 respectively. After that, as shown in FIG. 7, the second heated foam material 36 is fitted into the clutch main body portion 29 of the clutch 26, and the stepped portion 36 a is fixed to the notch surface of the power transmission portion 30 with a screw or the like.

Next, the operation of the shutter device 1 according to the present embodiment will be described mainly with reference to FIGS. 3 and 5.
In a normal use state, the rotating shaft body 15 of the winding shaft 6 of the shutter device 1 is normally and reversely rotated by an electric motor 18 by an operation button (not shown), so that the slat curtain 9 can be wound and unwound with respect to the opening 2. .. When the electric motor 18 is stopped due to a power failure or the like, the slat curtain 9 can be manually moved up and down to rotate the rotary shaft body 15 to wind and unwind the slat curtain 9.

When a fire occurs, the temperature of the shutter device 1 and its surroundings rises, the resin parts and the like in the electric motor 18 of the winding shaft 6 are heated, and combustible gas is generated. Before and after this, the first heated foam material 33 provided in the clutch 26 in FIG. 5 thermally expands due to the temperature increase in the periphery, and blows out through the output shaft 28 made of a resin that is melted by heat and the periphery thereof. The combustible gas to be sealed can be sealed inside the fitting receiving portion 31 made of aluminum.
Moreover, the fitting pipe 34 can prevent the flammable gas flowing out from the gap between the output shaft 28 and the fitting receiving portion 31 and the thermally expanded first heating foam material 33 from leaking out, and the foam expanding into the fitting pipe 34. The material can be pushed in and filled. Further, since the clutch 26 is also made of resin, it is melted by heat, but the cylindrical second heat-foamable material 36 provided around the clutch 26 thermally expands in the rotating shaft body 15 and seals the clutch 26, which is flammable. Can trap gas. Further, the second heated foam material 36 can also prevent the flammable gas from leaking from the electric motor 18.

In addition, in FIG. 2, since the third heating foam material 39 is installed in the concave groove 38 of the supporting portion 14 of the side cover 11 on the end portion 15b side of the rotary shaft body 15 of the winding shaft 6, this is By expanding, the end portion of the electric motor 18 on the motor head 25 side can be sealed. Therefore, in the rotating shaft body 15, the first and second heat-foaming materials 33 and 36 and the third heat-foaming material 39 provided at both ends of the electric motor 18, which is a source of generating a combustible gas, are sandwiched and sealed from both sides. Therefore, it is possible to reliably prevent the flammable gas from being blown out or leaked to the outside of the electric motor 18.

As described above, the shutter device 1 according to the present embodiment includes the first and second heating foam materials 33, 36 and the first and second heating foam materials 33, 36 provided at both ends of the electric motor 18 in the winding shaft 6 which is a main source of combustible gas. Since it can be thermally expanded and sealed from both sides by the 3 heating foam material 39, it can be sealed at a position close to the electric motor 18, which is a source of generating flammable gas, and the fire protection performance is improved.
Moreover, it is not necessary to install a heating foam material around the spring set 17 which is the outside of the electric motor 18 in the winding shaft 6, and it is possible to reliably prevent the blowing shaft 6 from blowing or leaking to the outside.

Further, although the resin clutch 26 is installed outside the electric motor 18, since the clutch 26 is covered with the substantially tubular second heated foam material 36, the combustible gas generated when the clutch 26 is melted by heat is surely generated. It is possible to prevent the flammable gas from spreading in the rotary shaft body 15 by sealing it.
Moreover, in the shutter device 1 according to the present embodiment, as compared with the conventional shutter device, the first to third heated foam materials 33, 36, 39 are concentratedly provided on both sides of the electric motor 18, so that the combustible gas is combusted. Since it can be sealed, the amount of the heat-foaming material and the installation location are small, and the installation space is small, so that the manufacturing cost can be reduced. Further, since it is not necessary to take measures for sealing the flammable gas outside the winding shaft 6, the manufacturing cost can be reduced also in this respect.

Although the shutter device 1 according to the embodiment of the present invention has been described above in detail, the present invention is not limited to the above-described embodiment, and appropriate changes and replacements can be made without departing from the scope of the present invention. And all of these are included in the present invention. Modifications and the like of the present invention will be described below, but the same or similar parts and members as those of the above-described embodiment will be denoted by the same reference numerals and description thereof will be omitted.

For example, in order to prevent the combustible gas from being generated from the electric motor 18 in the event of a fire, if there is the first heating foam material 33 installed in the space between the output shaft 28 and the fitting receiving portion 31 of the clutch 26. Good. Then, during thermal expansion, the first heated foam material 33 thermally expands, and the combustible gas and the thermally expanded first heated foam material 33 leak out from the gap between the output shaft 28 and the fitting receiving portion 31. It can be prevented by covering with a fitting pipe 34 made of. Further, if the clutch 26 is made of metal, the second foam material 36 can be omitted.
The second heat-foamable material 36 does not need to have a cylindrical shape and may be, for example, a substantially bowl shape or a conical shape as long as the clutch wire 32 can be inserted therein, as long as it can heat-foam and seal the clutch body 29. ..

Further, since the metallic rotating shaft body 15 accommodating the electric motor 18 is connected and fixed to the supporting portion 14 of the side cover 11 of the metallic shutter case 4, the combustibility of the electric motor 18 from the motor head 25 side is high. Since the outflow of gas is small, the installation of the third heated foam material 39 in the groove 38 may be omitted. Even in this case, leakage of the flammable gas to the outside can be suppressed.
The slat curtain 9 is included in the shutter surface, and the metal fitting pipe 34 is included in the metal covering member. The clutch 26 is included in the power transmission member.

1 Shutter Device 2 Opening 4 Shutter Case 6 Winding Shaft 8 Slat 9 Slat Curtain 11 Side Cover 15 Rotating Shaft 18 Electric Motor 24 Electric Motor Main Body 26 Clutch 28 Output Shaft 30 Power Transmission Section 31 Fitting Reception Section 33 First Heating Foam material 34 Fitting pipe 36 Second heat foam material 38 Groove 39 Third heat foam material

Claims (4)

In the shutter device that can wind the shutter surface that can open and close the opening on the winding shaft,
An electric motor provided in the winding shaft,
A power transmission member mounted on the electric motor;
A first heat-foamable material provided at a connecting portion between the electric motor and the power transmission member,
A metal coating member surrounding a connecting portion of the electric motor and the power transmission member,
A shutter device characterized by having. The shutter device according to claim 1, wherein the first heating foam material is installed between an output shaft of the electric motor and a fitting receiving portion of the power transmission member that fits the output shaft. The shutter device according to claim 1, further comprising a second heated foam material surrounding the outer peripheral side of the power transmission member. An end of the winding shaft that accommodates the electric motor is supported by a support portion of a side surface of a shutter case that houses the winding shaft,
The shutter device according to any one of claims 1 to 3, wherein a third heating foam material is provided on an end portion of the support portion or the electric motor.

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