JP5604082B2 - Shutter device - Google Patents

Description

  The present invention relates to a shutter device including an overhead door that partitions a space portion of a structure such as a building or a vehicle, particularly an entrance / exit of a public facility such as a department store, a large superstore, or a station, or an opening as a fire prevention compartment. The present invention relates to a large shutter device provided for closing.

  As a shutter device for fire prevention and smoke prevention provided to form a fire prevention section, the shutter is deformed even in a state where it is exposed to a flame for a certain period of time (depending on the required performance) so that the flame and smoke do not penetrate in the event of a fire. Therefore, heat resistance is required so that the gap does not penetrate.

  As a fire protection and smoke prevention shutter device provided to form a fire prevention compartment, a shutter curtain that opens and closes an opening is a long slat or rectangular panel formed by bending a metal plate such as a steel plate. In many cases, a plurality of plates are connected in a flexible manner. The thicker the plate, the easier it is to obtain heat resistance. As a general fire prevention and smoke prevention shutter device in Japan, in many cases, the thickness of the plate material used for the shutter device is T1.6 mm or more in accordance with the requirements of a typical fire prevention standard established in the country. .

  On the other hand, in order to reduce the cost of the shutter device, it is necessary to reduce the plate thickness, save the material used, and reduce the size of the drive device by reducing the weight. The deformation of the shutter curtain at high temperatures or the deformation of the shutter curtain take-up shaft becomes large, and the take-up shaft is greatly bent and a gap penetrates between the tuna and the shutter curtain take-up portion. End up. Furthermore, when the winding shaft is bent, the upper part of the shutter curtain is lowered while the lower end of the shutter curtain is grounded, and the shutter curtain is locally bent in the guide rail by receiving the downward compression force. It is also assumed that the shutter curtain is detached from the guide rail by expanding the groove of the guide rail.

  Therefore, in order to reduce the weight of the shutter device and promote cost reduction, it is essential to prevent deformation of the shutter curtain at high temperatures or deformation of the winding shaft of the shutter curtain.

JP 2000-192758 A

  In view of such a situation, the present invention provides a shutter device that reduces the weight of the shutter device and prevents deformation of the shutter device at high temperatures.

  In the present invention, a moving-side engagement receiving portion is provided at the shutter curtain upper end portion, a fixed-side engagement receiving portion engageable with the moving-side engagement receiving portion is provided on the building side, and the shutter curtain upper end portion is The shutter device is configured to be configured such that when further lowered from the fully closed state, the moving-side engagement receiving portion engages with the fixed-side engagement receiving portion, and the lowering of the upper end portion of the shutter curtain is suppressed. .

  According to the present invention, the shutter curtain is configured by connecting a plurality of shutter curtain constituent members in the shutter curtain descending direction, and the fixed-side engagement receiving portion is the casing or the shutter of the member fixed to the casing. The moving side engagement receiving portion is provided in a portion facing the curtain, and the moving side engagement receiving portion relates to a shutter device provided in a shutter curtain constituent member facing the fixed side engagement receiving portion in the fully closed state of the shutter curtain, The fixed-side engagement receiving portion is an upper end portion of the guide rail, and the moving-side engagement receiving portion is provided in a slat adjacent to the upper end portion of the guide rail when the shutter curtain is fully closed, When the shutter curtain further descends from the fully closed state, the receiving portion engages with the upper end of the guide rail and suppresses further lowering of the upper end portion of the shutter curtain. The moving side engagement receiving portion is provided on the rear surface of the upper end portion of the shutter curtain, the moving side engagement receiving portion is wound together with the shutter curtain, and the shutter curtain is fully closed. When the shutter curtain is further lowered from the fully closed state, the moving-side engagement receiving portion engages with the upper end of the guide rail to prevent further lowering of the shutter curtain. This relates to a shutter device.

  Further, according to the present invention, the winding shaft of the shutter curtain is provided with a gear-like member that rotates integrally with the winding shaft, and a movable-side engagement receiving portion that can mesh with the gear-like member is provided rotatably and the moving side. A stopper of meltable resin is provided to urge the engagement receiving portion toward the gear-shaped member and fix the movable side engagement receiving portion at a position where it does not mesh with the gear-shaped member, and the stopper is melted by heating. Thus, the moving-side engagement receiving portion meshes with the gear-shaped member and relates to a shutter device configured to stop the rotation of the winding shaft, and the winding drum on which the shutter curtain is wound is provided. A moving-side engagement receiving portion having a tip end portion serving as a first flange portion is rotatably provided so that the moving-side engagement receiving portion is wound around the winding drum together with the shutter curtain. The moving side in the closed state The joint part is exposed and suspended by its own weight, and the moving side engagement receiving part is suspended so as to be opposed to the moving side engagement receiving part, and has a second flange part. A side engagement receiving portion is provided, and the winding drum rotates further in a direction in which the shutter curtain is further lowered from the fully closed state of the shutter curtain, so that the first hook portion and the second hook portion are engaged with each other. The present invention relates to a shutter device configured to stop the rotation of the winding shaft.

  According to the present invention, the movement-side engagement receiving portion is provided at the upper end portion of the shutter curtain, the fixed-side engagement receiving portion engageable with the movement-side engagement receiving portion is provided on the building side, and the shutter curtain upper end portion is provided. When the moving part is further lowered from the fully closed state, the moving side engaging receiving part is engaged with the fixed side engaging receiving part, and the lowering of the upper end part of the shutter curtain is suppressed. Even when the take-up shaft is greatly bent due to a decrease in rigidity due to heating, the shutter curtain can be displaced and moved downward by engaging the movable side engagement receiving part and the fixed side engagement receiving part. It is restrained, and the occurrence of warpage due to the temperature difference between the front and back of the shutter curtain is restricted to compensate for the decrease in rigidity associated with the weight reduction of the shutter curtain, to ensure the prevention of the penetration of the gap, and to improve the fire prevention and smoke prevention performance.

  According to the invention, the shutter curtain is configured by connecting a plurality of shutter curtain constituent members in the direction in which the shutter curtain descends, and the fixed-side engagement receiving portion is a casing or a member fixed to the casing. Provided in a portion facing the shutter curtain, and the moving side engagement receiving portion is provided in a shutter curtain constituting member facing the fixed side engagement receiving portion in the fully closed state of the shutter curtain, so that the structure is simple. Thus, the shutter curtain can be prevented from descending in an emergency.

  According to the invention, the fixed-side engagement receiving portion is an upper end portion of the guide rail, and the moving-side engagement receiving portion is formed on a slat adjacent to the upper end portion of the guide rail when the shutter curtain is fully closed. Provided, the moving side engagement receiving portion engages with the upper end of the guide rail when the shutter curtain is further lowered from the fully closed state, and suppresses further lowering of the upper end portion of the shutter curtain. With a structure in which a simple member is provided, the shutter curtain can be reliably prevented from descending in an emergency, and can be easily added to an existing shutter device.

  According to the invention, the moving side engagement receiving portion is provided on the back surface of the upper end portion of the shutter curtain, the moving side engagement receiving portion is wound together with the shutter curtain, and the shutter curtain is fully closed. When the shutter curtain is further lowered from the fully closed state, the moving side engagement receiving portion is engaged with the upper end of the guide rail, and the shutter curtain is further lowered. Therefore, the shutter curtain can be reliably prevented from lowering in an emergency with a structure in which a simple member is provided, and can be easily added to an existing shutter device.

  According to the present invention, the winding shaft of the shutter curtain is provided with a gear-like member that rotates integrally with the winding shaft, and the movable-side engagement receiving portion that can mesh with the gear-like member is provided rotatably. A movable resin receiving portion is urged toward the gear-like member, and a meltable resin stopper is provided to fix the moving-side engagement receiving portion at a position where the moving-side engagement receiving portion does not mesh with the gear-like member. By melting, the moving side engagement receiving portion meshes with the gear-like member and stops the rotation of the winding shaft, so that the shutter curtain holding force by the opening / closing device is lost due to the failure of the opening / closing device. In this case, the shutter curtain can be reliably prevented from descending.

  Further, according to the present invention, the moving-side engagement receiving portion having the tip end as the first flange portion is rotatably provided on the winding drum on which the shutter curtain is wound, and the moving-side engagement receiving portion together with the shutter curtain is provided. In the state where the winding side is wound around the winding drum and the shutter curtain is fully closed, the moving side engagement receiving part is exposed and hangs down by its own weight, and the moving side engagement receiving part is suspended. A fixed-side engagement receiving portion that is disposed to face the moving-side engagement receiving portion and has a second flange portion, and the winding drum further lowers the shutter curtain from the fully closed state of the shutter curtain. Since the first hook part and the second hook part are engaged with each other by rotating in the direction to stop the rotation of the winding shaft, the moving side engagement receiving part becomes a gear-like member. Since it is configured to mesh and stop the rotation of the winding shaft, Also exhibited an excellent effect that can be reliably suppressed lowering of the shutter curtain when the holding force of the shutter curtain by openers in failure 閉機 is lost.

1 is a schematic side view showing a first embodiment of the present invention. It is the same general front view. It is a partial front view which shows the 2nd Example of this invention. It is A arrow directional view of FIG. It is a partial side view which shows the 3rd Example of this invention. It is a partial side view which shows the 4th Example of this invention. It is a partial side view which shows the 5th Example of this invention. It is a top view which shows the example of a change of this invention and shows the reinforced guide rail.

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

  A first embodiment of the present invention will be described with reference to FIGS.

  In FIG. 1 and FIG. 2, 1 is a building frame, 2 is an opening, and 3 is a shutter device.

  A shutter curtain housing portion of the shutter device 3 is located above the opening 2 and is attached to the housing 1.

  The shutter curtain storage unit has a winding shaft 5 driven by an opening / closing device (not shown) constituted by a motor, a brake, and the like, and a shutter curtain is attached to the winding drum 6 integrated with the winding shaft 5. 7 is wound up.

  The shutter curtain 7 is configured by connecting slats 8 so as to be bent in a required number in the vertical direction. The uppermost slat 8 a of the shutter curtain 7 is fixed to the winding drum 6, and a drainer 9 is connected to the lower end of the shutter curtain 7. Both width end portions of the shutter curtain 7 are guided by guide rails 10 attached to the housing side, that is, the wall surface of the building or the pillar of the building, wound by forward and reverse rotation of the winding drum 6, and fed out. Then, it goes up and down along the guide rail 10.

  In the lower part of the shutter curtain housing part, the entrance / exit part of the shutter curtain feeding into and out of the opening part, that is, the lintel 11 provided in the lower part of the housing 1 (in FIG. 1, the lintel member is illustrated for convenience. A hook receiving member 12 that is a fixed-side engagement receiving portion is provided so as to face the shutter curtain 7. The hook receiving member 12 has a shape in which the lower part is folded so that a concave groove is formed. Further, the hook receiving member 12 is further provided at a required portion including both ends of the shutter curtain 7 in the width direction (left and right direction in FIG. 2), in the drawing, at one central portion in the width direction of the shutter curtain 7, There are a total of three locations.

  The hook receiving member 12 may be installed only at both ends in the width direction of the shutter curtain 7 or only at the center in the width direction. Further, the hook receiving member 12 may be a single member having a length over substantially the entire width of the shutter curtain 7.

  In a state where the shutter curtain 7 closes the opening 2 (fully closed state), that is, in a state where the drainer 9 is in contact with the floor surface, the slat 8b at the portion facing the hook receiving member 12 receives the moving side engagement receiving. The hook member 13 which is a portion is fixed. The hook member 13 has a crank-like cross-sectional shape in which the lower part is separated from the shutter curtain 7, and the lower part enters the recessed part of the hook receiving member 12. The hook member 13 is preferably in a non-contact state with respect to the hook receiving member 12 so that the drainer 9 is securely grounded. Further, when the control is performed to automatically stop the shutter curtain 7 in the fully closed state during the closing operation, it is preferable that the hook member 13 is stopped without contact with the hook receiving member 12.

  The cross-sectional shape of the hook member 13 is not limited to the crank shape, and may be an inverted U shape. In short, the lower end portion of the hook member 13 enters the recessed groove of the hook receiving member 12. It only has to be.

  The hook member 13 may be partially provided so as to correspond to the hook receiving member 12, but is preferably a single member having a length over the entire width of the shutter curtain 7. In this case, the hook member 13 also functions as a reinforcing member for the shutter curtain 7.

  When the opening 2 is opened and the shutter curtain 7 is wound, the hook member 13 is wound together with the shutter curtain 7 and interposed between the winding layers of the shutter curtain 7.

  When the shutter curtain 7 is closed (the state shown in FIG. 1), the drainer 9 is completely grounded to the floor surface. The hook member 13 enters the hook receiving member 12 or is in a state immediately before entering, and this state is held by a brake of the switch.

  Next, in the event of a fire, the take-up shaft 5 is heated to reduce its rigidity, and the take-up shaft 5 bends due to the weight of the shutter curtain 7 and the take-up shaft 5. Further, it is conceivable that the brake of the opening / closing machine burns out and the holding force of the shutter curtain 7 by the brake is lost.

  The shutter curtain 7 is lowered due to the bending of the winding shaft 5, but the hook member 13 engages with the hook receiving member 12, so that the own weight of the shutter curtain 7 is passed through the hook receiving member 12. It is supported by the 11 side. Therefore, the closed state of the opening 2 by the shutter curtain 7 does not change regardless of the bending of the winding shaft 5.

  The shutter curtain 7 may be warped due to a difference in temperature between the front and back surfaces due to heating, but the warpage of the shutter curtain 7 is suppressed when the hook member 13 is fitted into the concave groove of the hook receiving member 12. The hook member 13 is not detached from the hook receiving member 12, and a gap is prevented from being generated between the lintel 11 and the shutter curtain 7.

  Further, even when the brake is burned out before the winding shaft 5 is reduced in rigidity by heating, similarly, the shutter curtain 7 is lowered due to the engagement between the hook member 13 and the hook receiving member 12. Is prevented. Therefore, the shutter curtain 7 is locally bent in the guide rail 10 and the groove of the guide rail 10 is expanded to prevent the shutter curtain 7 from being detached from the guide rail 10.

  Here, the amount of movement of the shutter curtain from the fully closed state of the shutter curtain in which the moving side engagement receiving portion and the fixed side engagement receiving portion are in the non-contact state until the shutter curtain further moves in the closing direction to the contact state is The degree that the shutter curtain does not bend greatly is better and the smaller it is better, but the moving side engagement receiving part and the fixed side relation are within 120 mm (the slat pitch value of a general slat type shutter curtain for large shutters). It is preferable to set the installation position with the receiving part.

  In the above embodiment, the hook member 13 and the hook receiving member 12 have been described as means for preventing the shutter curtain 7 from descending.

  3 and 4 show a second embodiment having another shutter curtain 7 descent prevention means.

  FIG. 3 shows a state in which the shutter curtain 7 fully closes the opening 2, and in the fully closed state, the moving side engagement receiving portion is placed on the slat 8 b positioned at the upper end of the guide rail 10 or the slat 8 b adjacent to the upper end. The hook member 15 is fixed. In the fully closed state of the shutter curtain 7 at a constant time, the hook member 15 is not in contact with the upper end of the guide rail 10.

  The hook member 15 further extends outward from the width end of the shutter curtain 7 and has a shape that abuts on the upper end of the guide rail 10 when the shutter curtain 7 is displaced downward.

  In the figure, the hook member 15 is bent toward the front side and engages with the front side of the guide rail 10. However, the hook member 15 is not bent and protrudes further from the bottom surface of the guide rail 10. The hook member 15 may be engaged with the bottom surface of the guide rail 10. Alternatively, the planar shape of the hook member 15 may be T-shaped, and may be engaged with both the front and back surfaces of the guide rail 10.

  In the second embodiment, when the winding shaft 5 bends in an emergency (see FIG. 1) or the shutter curtain 7 is displaced downward when the brake burns out, the hook member 15 is moved to the guide rail. 10 is engaged to prevent the shutter curtain 7 from descending. In the second embodiment, the upper end portion of the guide rail 10 functions as a fixed side engagement receiving portion.

  In the case of performing control to automatically stop the shutter curtain 7 in the fully closed state during the closing operation, it is preferable that the hook member 15 is stopped without contact with the upper end portion of the guide rail 10.

  Further, according to the illustrated example, the hook members 15 are provided at both ends in the width direction of the shutter curtain 7, but the hook members 15 at both ends in the width direction of the shutter curtain 7 can be used as one through member. is there. In this case, the hook member 15 also functions as a reinforcing member, preventing the shutter curtain 7 from warping and preventing the gap between the lintel 11 and the shutter curtain 7.

  FIG. 5 shows a third embodiment.

  In the third embodiment, a case is shown in which a hook member 17 that is a moving-side engagement receiving portion is provided on the back side of the shutter curtain 7 (the surface opposite to the first embodiment).

  The hook member 17 is fixed to the slat 8b located above the upper end of the guide rail 10 when the shutter curtain 7 is fully closed, and the hook member 17 is in a position where it does not interfere with the guide rail 10. .

  The hook member 17 may be partially provided at both ends of the shutter curtain 7 facing the guide rail 10, or may be provided over the entire width of the shutter curtain 7. Further, the cross-sectional shape of the hook member 17 is a cylindrical curved surface or a substantially cylindrical curved surface so as not to be thickened when wound, and for example, matches the curved surface of the winding drum 6. It is like.

  In the third embodiment, if the shutter shaft 7 is displaced downward when the winding shaft 5 bends or the brake burns out in an emergency, the hook member 17 is moved to the upper end of the guide rail 10. It abuts and prevents the shutter curtain 7 from descending. In the third embodiment, the upper end portion of the guide rail 10 functions as a fixed-side engagement receiving portion.

  In the third embodiment, the position of the hook member 17 is not the upper end of the guide rail 10 but the upper portion of the lintel 11 so that the portion where the hook member 17 abuts is the shutter curtain. It is also possible to set it to the center side in the width direction. In this case, the upper part of the lintel 11 functions as a fixed-side engagement receiving part. Moreover, you may make it provide both the said hook member 17 contact | abutted to the upper end of the said guide rail 10, and the said hook member 17 contact | abutted to the upper part of the lintel 11.

  FIG. 6 shows a fourth embodiment.

  The fourth embodiment corresponds to the case where the brake of the opening / closing machine is burned out or breaks down and the holding force of the shutter curtain 7 by the brake is lost.

  At least one end of the winding shaft 5 is provided with a gear-like member 18 whose gear portion functions as a moving-side engagement receiving portion, and the gear-like member 18 rotates integrally with the winding shaft 5. The gear-like member 18 may also serve as a power transmission mechanism element from the opening / closing machine to the winding drum 6. A hook member 19, which is a fixed-side engagement receiving portion, is rotatably provided on a bracket (not shown) that supports the take-up shaft 5 via a pin 21 at a position facing the gear-like member 18.

  The hook member 19 has an eccentric center of gravity so as to rotate toward the gear-shaped member 18, and is provided in a posture so as to rotate toward the gear-shaped member 18. The hook member 19 has a latch claw 22 projecting toward the gear-like member 18 at the upper end, and the rotation of the hook member 19 is restricted by a stopper 23.

  The stopper 23 is formed of a temperature melting material (for example, a low melting point metal such as solder or wood alloy, or a synthetic resin having low heat resistance such as polypropylene), and is lower than a temperature at which the brake of the switchgear burns out. The melting at a predetermined temperature (for example, 200 ° C.) or higher causes the gear-shaped member 18 to be deregulated.

  Therefore, before the brake of the switchgear burns, the stopper 23 is melted, the restriction of the hook member 19 is released, the hook member 19 rotates toward the gear-shaped member 18, and the latch claw 22 is The rotation of the gear-shaped member 18 is stopped by meshing with the gear-shaped member 18, that is, the rotation of the winding shaft 5 is stopped, and the lowering of the shutter curtain 7 is suppressed.

  In the above description, the rotational force is given by the eccentric center of gravity. However, a spring may be provided and the hook member 19 may be given a rotational force by the spring. The stopper 23 may be provided by using a well-known installation structure as long as there is no functional limitation. The stopper 23 restricts the rotation of the hook member 19 before melting, and the manner of the restriction is not limited as long as the restriction can be released by melting. Another example of the aspect of supporting and restricting the hook member 19 As an example, the stopper 23 is a temperature-melting adhesive and can be controlled by being adhesively fixed to the rotary shaft of the hook member 19.

  Furthermore, the hook member 19 can be provided so as to be directly locked to the shutter curtain 7.

  At this time, as a method of locking to the shutter curtain 7, the hook member 19 is provided rotatably at a fixed portion near the lintel 11 via a pin 21 (see FIG. 5), and the shutter curtain 7 is fully closed. A hole serving as a moving-side engagement receiving portion is provided at a location facing the hook member 19 in the case, and when the rotation of the stopper 23 is released, the tip of the hook member 19 can be inserted into the hole. The tip of the hook member 19 may be inserted into the hole and engaged therewith.

  At this time, the hook member 19 must support the shutter curtain 7 in a state in which the tip portion is inserted into a hole provided in the shutter curtain 7, so that the rotation amount of the hook member 19 is appropriately limited. Configure. The rotation amount of the hook member 19 may be restricted, for example, in the vicinity of the rotation axis of the hook member 19, or the hook member 19 may be provided at the tip of the hook member 19 penetrating the shutter curtain 7. You may provide the receiving part which receives the front-end | tip.

  Further, both the hook member 19 that meshes with the gear-shaped member 18 and the hook member 19 that engages with a tip portion inserted into a hole provided in the shutter curtain 7 may be provided.

  FIG. 7 shows a fifth embodiment. In the fifth embodiment, a hook member 24 that is a moving-side engagement receiving portion is attached to the take-up drum 6 via a fixing bracket 25. The hook member 24 is rotatable, and a hook portion 26 that is folded back at a required angle is formed at the lower end portion. The hook member 24 may be provided partially, or may be provided through the entire width of the winding drum 6.

  When the shutter curtain 7 is fully closed, the upper shutter curtain 7 disappears, and when the fixing bracket 25 and the hook member 24 are exposed, the hook member 24 is suspended by its own weight. A hook receiving member 27, which is a fixed-side engagement receiving portion, is provided so as to face the hook member 24, particularly, to face the flange portion 26.

  The hook receiving member 27 is provided, for example, so as to extend over a bracket that supports both ends of the take-up shaft 5, and has a vertical standing piece 27a. A receiving collar portion 29 that can be engaged with is formed.

  When the winding shaft 5 further rotates in the direction in which the shutter curtain 7 is lowered (counterclockwise in the figure) from the fully closed state of the shutter curtain 7, the hook member 24 is displaced toward the standing piece 27a. When the rotation further rotates, the flange portion 26 and the receiving flange portion 29 engage with each other, and the rotation of the winding shaft 5 in the direction in which the shutter curtain 7 is lowered is restricted. Accordingly, the lowering of the shutter curtain 7 is suppressed.

  The hook member 24 may be attached to a slat of a shutter curtain. In this case, the hook member 24 is folded and accommodated in the slat of the shutter curtain, and is restrained in a folded state by a stopper made of a material having a heat melting property (the same material as the stopper 23) fixed to the slat. However, when the restraint is released due to high heat, it may be unfolded so as to protrude from the shutter curtain from the folded state, and engage with the hook receiving member 27 when the shutter curtain is fully closed. Further, the automatic deployment at the time of releasing the restraint may be due to its own weight or due to a biasing force such as a spring force or a magnetic force. The engagement form between the hook member 24 and the hook receiving member 27 is arbitrary as long as it is an engagement that can be engaged from a non-engaged state and the lowering of the upper end of the shutter curtain is suppressed in actual use. is there.

  As described above, when the winding shaft 5 is bent at a high temperature, the gap penetrates, so a method of suppressing the temperature rise of the winding shaft 5 is also conceivable.

  As a means for suppressing the temperature rise, the winding shaft 5 and the case that houses the shutter curtain 7 wound around the winding shaft 5 have a heat insulating structure.

  As a means for providing a heat insulating structure, a heat insulating paint is applied to the case. Alternatively, a glass wool layer is provided on the outer surface, inner surface, or both surfaces of the case. Alternatively, the winding shaft 5 itself has a heat insulating structure. For example, glass wool is wound around the winding shaft 5 so that the shutter curtain 7 is wound on the glass wool. Alternatively, it is also possible to provide about one layer of shutter curtain waste winding on the winding shaft 5, and to interpose a heat insulating material between the winding winding and the winding shaft 5.

  Furthermore, as shown in FIG. 5, a heat insulating material 32 such as glass wool is laid on the ceiling material 31, and heat from the room is blocked by the heat insulating material 32 so as to suppress the temperature rise of the winding shaft 5. May be.

  In addition, as described above, when the shutter curtain 7 is further lowered from the fully closed state, the shutter curtain 7 is locally bent in the guide rail 10 to widen the groove of the guide rail 10 and the shutter curtain 7 is moved from the guide rail 10. Come off. Therefore, the rigidity of the guide rail 10 may be increased so that the groove of the guide rail 10 does not expand even if the shutter curtain 7 is locally bent.

  FIG. 8 shows an example in which the rigidity of the guide rail 10 is increased.

  A U-shaped reinforcing member 33 is inserted into the guide rail 10, and the strength and rigidity of the guide rail 10 are increased by the reinforcing member 33.

  By increasing the strength and rigidity of the guide rail 10, even if the shutter curtain 7 is locally bent, the guide rail 10 does not spread, and the bent portion of the shutter curtain 7 extends in the vertical direction of the shutter curtain 7. The displacement is restrained and the descent of the shutter curtain 7 is prevented as a whole.

  In each of the embodiments described above, the shutter device in which the shutter curtain is wound and stored has been described. However, the present invention can also be applied to a non-winding shutter device in which the shutter curtain is not wound and stored.

  In the case of the non-winding type, the winding shaft may be replaced with a shaft body that interlocks with opening and closing of the shutter curtain such as a driving shaft.

  In each of the above embodiments, the shutter curtain has been described as being configured by connecting a plurality of long slats formed by bending a metal plate material such as a steel plate in the open / close direction so that it can be bent freely. The present invention can also be applied to a configuration in which a plurality of rectangular panels are flexibly connected in the opening / closing direction.

  The moving side engagement receiving part and the fixed side engagement receiving part may be members themselves, but the moving side engagement receiving part may be formed by processing a part of the shutter curtain, the lintel member or the guide rail member. Or a fixed-side engagement receiving portion.

  Furthermore, in the first to fourth embodiments, the moving side engaging receiving portion and the fixed side engaging receiving portion are located near the upper end of the shutter curtain (more specifically, when the shutter curtain is fully closed, Is provided so as to be engaged at a position near the upper end of the opening (more specifically, near the lintel). However, it can also be provided to engage at a higher position. is there.

  In each of the embodiments including the fifth embodiment, the upper end side of the shutter curtain is prevented from being lowered by engaging the moving side engagement receiving portion and the fixed side engagement receiving portion upward. Therefore, the downward compressive force due to the lowering of the upper end side is not transmitted downward, and the load of the most area in the vertical direction of the shutter curtain can also be used as the suspension support. Since the compressive force in the direction can be reduced, the shutter curtain can be locally bent in the guide rail to prevent the shutter curtain from being detached from the guide rail by spreading the groove of the guide rail. Furthermore, the above-described embodiments can be implemented in appropriate combination.

DESCRIPTION OF SYMBOLS 1 Housing 2 Opening part 3 Shutter apparatus 5 Winding shaft 6 Winding drum 7 Shutter curtain 8 Slat 10 Guide rail 12 Hook receiving member 13 Hook member 15 Hook member 17 Hook member 18 Gear-shaped member 19 Hook member 21 Pin 22 Latch claw 23 Stopper 24 Hook member 27 Hook receiving member

Claims (6)

A moving-side engagement receiving portion is provided at the upper end of the shutter curtain, and a fixed-side engaging receiving portion that can be engaged with the moving-side engagement receiving portion is provided on the building side. The fixed-side engagement receiving portion is a guide rail. The moving side engagement receiving portion is provided on a slat adjacent to the upper end portion of the guide rail when the shutter curtain is fully closed, and the moving side engagement receiving portion is fully closed. when further lowered from the state, the engaging the upper end of the guide rails, the shutter device being characterized in that is constituted like you suppress further descent of the shutter curtain upper end. Movable engagement receiving portion is provided in the shutter curtain upper portion, the movable side engagement receiving portion engageable with the fixed-side engagement receiving portion is provided on the building side, the movable side engagement receiving portion, said Provided on the rear surface of the upper end portion of the shutter curtain, the moving side engagement receiving portion is wound together with the shutter curtain, and is positioned above the guide rail in the fully closed state of the shutter curtain. further when lowered, the moving-side engagement receiving portion engages the upper end of the guide rail, a shutter device, characterized in that constructed like you suppress further descent of the shutter curtain. A moving-side engagement receiving portion is provided at an upper end portion of the shutter curtain, and a fixed-side engaging receiving portion that can be engaged with the moving-side engagement receiving portion is provided on the building side, and the moving-side engagement receiving portion is the shutter. It is a gear-like member that rotates integrally with the take-up shaft provided on the take-up shaft of the curtain, and the fixed-side engagement receiving portion can be engaged with the gear-like member and is provided rotatably, and the gear-like member. A stopper of meltable resin that is urged toward the member and is fixed at a position where the fixed-side engagement receiving portion does not mesh with the gear-shaped member is provided. when further lowered from the closed state, the shutter device in which the stationary side engagement receiving portion is engaged with the gear-like member, characterized in that the rotation of the winding shaft is configured like Ru stopped. A moving-side engagement receiving portion is provided at the upper end of the shutter curtain, and a fixed-side engaging receiving portion that can be engaged with the moving-side engagement receiving portion is provided on the building side. The moving-side engagement receiving portion is a shutter curtain. Is wound around the winding drum, has a first flange at the tip, and the moving-side engagement receiving portion is wound around the winding drum together with the shutter curtain. When the shutter curtain is fully closed, the moving side engagement receiving part is exposed and suspended by its own weight, and the fixed side engaging receiving part is suspended while the moving side engagement receiving part is suspended. It has a second hook part that is disposed so as to face the receiving part and can be engaged with the first hook part, and the winding drum further lowers the shutter curtain from the fully closed state of the shutter curtain. The first hook part and the second hook part are engaged with each other by rotating in the direction. Shutter device, characterized in that the rotation of the winding shaft is configured like Ru stopped. The shutter curtain is configured by connecting a plurality of shutter curtain constituent members in the lowering direction of the shutter curtain, and the fixed side engagement receiving portion is a casing or a portion of the member fixed to the casing that faces the shutter curtain. The shutter according to any one of claims 1 to 4 , wherein the moving-side engagement receiving portion is provided on a shutter curtain constituent member facing the fixed-side engagement receiving portion in a fully closed state of the shutter curtain. apparatus.   The shutter device according to claim 1, wherein the moving side engagement receiving portion is a through member provided over the entire length in the width direction of the shutter curtain, and the moving side engagement receiving portion functions as a reinforcing member.

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