JP4684738B2 - Shutter device - Google Patents

Description

  The present invention relates to a shutter device that includes a shutter curtain having at least a lower end formed of a panel, and that opens and closes an opening of a construction / structure such as a container or a building by the shutter curtain.

  There is a shutter device for opening and closing an opening of a building or structure such as a building or an opening, a window, etc., and there is a panel shutter as one of the shutter devices, and the panel shutter connects a plurality of panels so that they can be bent. A shutter curtain is provided, and the shutter curtain is raised and lowered along the guide rail.

  An example of the panel shutter is disclosed in Patent Document 1. An outline of an overhead door which is one of panel shutters will be described with reference to FIG.

  A vertical guide rail 3 is provided on the indoor side of both side pillars 2 of the opening 1 of a building or the like, and a storage guide rail 4 is provided along the ceiling. The vertical guide rail 3 and the storage guide rail 4 are curved rails. 5 are connected. An opening / closing device 7 having a horizontal take-up shaft 6 is provided above the vertical guide rail 3.

  A shutter curtain 8 is slidable along the vertical guide rail 3, the curved rail 5, and the storage guide rail 4, and the shutter curtain 8 is configured by a required number of panels 9 being flexibly connected. Yes.

  The winding shaft 6 is rotatably supported by a bracket 14, drums 11 are provided at both ends of the winding shaft 6, and a wire 12 wound around the drum 11 is attached to the lower end portion of the shutter curtain 8. It is attached. The take-up shaft 6 is provided with a balance spring 13, and the balance spring 13 urges the shutter curtain 8 in the upward direction via the wire 12.

  When the opening 1 is opened, the wire 12 is wound by pulling up the shutter curtain 8 and rotating the drum 11 via the winding shaft 6 by the balance spring 13. The shutter curtain 8 is pulled up along the vertical guide rail 3 and further stored in the storage guide rail 4.

  When the opening 1 is closed, the shutter curtain 8 is lowered by lowering the shutter curtain 8, the drum 11 is rotated in the reverse direction, and the wire 12 is fed out. The weight of the shutter curtain 8 is balanced by the balance spring 13.

  As described above, the shutter curtain 8 is suspended by the wire 12, and the weight of the shutter curtain 8 is balanced by the balance spring 13 through the wire 12. 12. If the balance spring 13 deteriorates with time due to wear, fatigue, etc., and is unexpectedly cut or broken, the shutter curtain 8 may fall by its own weight.

  As a device for preventing the shutter curtain 8 from dropping, there is one disclosed in Patent Document 2.

  In FIG. 10, a conventional shutter curtain fall prevention device will be outlined.

  A stopper 15 is rotatably provided at the end of the shutter curtain 8, and the stopper 15 is urged in a protruding direction by a spring 16. A wire 12 is engaged with the stopper 15, and tension is generated in the wire 12 so that the stopper 15 is stored.

  A locking portion 17 is provided along the vertical guide rail 3 so as to face the end of the shutter curtain 8, and a locking bar 18 is provided at a predetermined interval in the locking portion 17, and the stopper 15 is in a protruding state. Thus, the engaging bar 18 is engaged.

  When the wire 12 is unexpectedly cut or the balance spring 13 (see FIG. 9) is broken, there is no means for supporting the shutter curtain 8 and the shutter curtain 8 falls, but at the same time, the wire 12 Since there is no tension acting on the stopper 15, the stopper 15 protrudes. When the stopper 15 protrudes, the stopper 15 engages with the locking bar 18, and the downward movement of the shutter curtain 8 is restricted, and the shutter curtain 8 is prevented from falling.

  The conventional shutter curtain fall prevention device has a problem that the mechanism is complicated, the number of parts is large, and the manufacturing cost is high.

Japanese Utility Model Publication No. 7-26587

JP 2003-56265 A

  In view of such a situation, the present invention provides a shutter device having a shutter curtain fall prevention device that has a simple structure and can prevent the shutter curtain from falling unexpectedly.

  The present invention comprises a shutter curtain having at least a lower end portion constituted by a panel, and a shutter member in which a linear member is attached to and suspended from the lower end of the shutter curtain, and projects downward from the lowermost panel. A tension member is provided so that the linear member is connected to the tension member, and the tension member acts with a tension acting on the linear member in a state where the shutter curtain is suspended by the linear member. Is stored, and when the tension of the linear member becomes a predetermined value or less, the projecting member projects, and the projecting state of the projecting member is maintained, and the projecting member Is supported by a shutter device whose rotation in the projecting direction is urged by a spring, and the projecting member is supported so as to be slidable in the vertical direction. The linear member is related to a shutter device directly connected to the projecting member, and the engagement fitting is fitted to and detached from the width end of the lowermost panel. The linear member is engaged with the engagement metal fitting, the engagement metal fitting is fitted into the panel, and the protrusion of the projecting member is suppressed in a state where tension is applied to the linear member. In addition, the present invention relates to a shutter device configured such that when the tension of the linear member becomes equal to or less than a predetermined value, the engagement fitting is detached by an urging force acting on the projecting member.

  According to the present invention, in a shutter device that includes a shutter curtain having at least a lower end portion constituted by a panel, and a linear member is attached to and suspended from the lower end of the shutter curtain, the shutter panel is lowered to the lowermost panel. A projecting member is provided on the projecting member, the linear member is connected to the projecting member, and the projecting member is applied with a tension acting on the linear member in a state where the shutter curtain is suspended by the linear member. Since the tension member is stored, and the tension member protrudes when the tension of the linear member falls below a predetermined value, the projection state of the tension member is maintained. When the vehicle descends under its own weight, the projecting member suppresses the descent and a gap is formed between the lower end of the shutter curtain and the floor surface to prevent the shutter curtain from being pinched by the descent. The structure is simple and inexpensive to be installed in the shutter device.

  Further, according to the present invention, the engagement fitting is provided so as to be detachable from the width end portion of the lowermost panel, the linear member is engaged with the engagement fitting, and the engagement fitting is attached to the panel. When the tension is applied to the linear member, the protruding member is prevented from projecting, and when the tension of the linear member becomes equal to or less than a predetermined value, Since the engagement fitting is configured to be detached, when the projecting member is stored, only the engagement fitting is fitted to the panel while the projecting member is housed in the panel. It is good, and it has excellent effects such as being able to easily return to the current state.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 shows an outline of an overhead door as an example of a shutter device in which the present invention is implemented.

  FIG. 1 shows a manual open / close overhead door, the basic structure of which is the same as that shown in FIG.

  A chain opening / closing mechanism 22 is attached to a wall surface 21 provided with an opening, and the chain opening / closing mechanism 22 and a sprocket 23 fitted to one end of the take-up shaft 6 are connected by a chain 24. A chain 25 is suspended from the chain opening / closing mechanism 22, and the winding shaft 6 is rotated via the chain 24 and the sprocket 23 by rotating the chain 25 in a required direction, whereby the wire 12 which is a linear member. The shutter curtain 8 is opened and closed via

  In addition, it is also possible to make an electric overhead door by driving the winding shaft 6 by a motor or the like.

  Drop prevention devices 26 are provided at both lower ends of the shutter curtain 8. The following describes one fall prevention device 26.

  The first embodiment will be described with reference to FIGS.

  An engagement fitting 27 is engaged with the lower end of the wire 12. As shown in FIG. 6, the engaging metal fitting 27 is formed with an L-shaped outer piece 28 having a neutral piece 29 and an inner piece 30, and an outer groove 31 and an inner groove 32. A wire engagement pin 33 is provided between the outer piece 28 and the neutral piece 29 so as to cross the outer groove 31, and the wire 12 is engaged with the wire engagement pin 33.

  A corner fitting 34 formed in a U-shape is provided at the lower left end of the lowermost panel 9, and the inner groove 32 of the engagement fitting 27 can be fitted into and removed from the bottom piece 34 a of the corner fitting 34. ing.

  The lower rod 35 of the lowermost panel 9 is provided with a tension rod 36 which is a tension member rotatably via a support shaft 37, and the tension rod 36 is lowered by a coil spring 38 (counterclockwise in FIG. 5). ) And the tip of the projecting rod 36 comes into contact with the outer piece 28 of the engagement fitting 27 fitted to the corner fitting 34. The projecting bar 36 is prevented from protruding by the engagement fitting 27, and the projecting bar 36 is stored in the panel 9.

  The lower surface of the both ends of the lower bar 35 is cut off, and when the engagement fitting 27 is removed, the projecting bar 36 rotates downward to a substantially vertical state (see FIG. 6). The lower bar 35 is provided with a stopper 39. The stopper 39 stops the rotation of the tension bar 36 in a substantially vertical state. The state in which the tension bar 36 is stopped by the stopper 39 may be such that the tension bar 36 is slightly inclined from the vertical to the center side of the shutter curtain 8.

  A draining seal 42 is provided on the lower surface of the lower rod 35 via a draining seal fixing frame 41, and both ends of the draining seal 42 are notched so that the lower surface does not interfere with the rotation of the tension rod 36. . The corner metal fitting 34 may be omitted, and the engagement metal fitting 27 may be directly engaged with the horizontal bar 40 of the panel 9.

  In the figure, reference numeral 43 denotes a roller that is fitted to the vertical guide rail 3 so as to be able to roll.

  The operation will be described below.

  The engagement metal fitting 27 engaged with the lower end of the wire 12 is engaged with both lower end portions of the panel 9. The engagement fitting 27 and the panel 9 are engaged by inserting the inner groove 32 into the corner fitting 34. The panel 9, that is, the shutter curtain 8 is suspended through the wire 12. Since the weight of the shutter curtain 8 acts on the engagement fitting 27, the engagement between the engagement fitting 27 and the corner fitting 34 is firmly maintained. Further, a force in the pulling direction acts on the engagement fitting 27 from the coil spring 38 through the projecting rod 36, and the biasing force by the coil spring 38 acts on the engagement fitting 27 by the shutter curtain 8. It is set smaller than the force (minimum tension on which the wire 12 acts).

  Therefore, the engagement fitting 27 prevents the projecting rod 36 from protruding and maintains the retracted state of the projecting rod 36.

  When the shutter curtain 8 is opened and closed and the shutter curtain 8 is suspended from the wire 12 and the wire 12 is unexpectedly cut or the balance spring 13 is broken, the tension of the wire 12 is increased. It disappears or decreases significantly.

  When the tension of the wire 12 disappears or falls below a predetermined value (below the biasing force by the coil spring 38), the tension rod 36 rotates downward by the biasing force of the coil spring 38, and the tension rod The engagement fitting 27 is detached from the corner fitting 34 by the rotation of 36. When the engagement between the engagement fitting 27 and the tension bar 36 is released, the tension bar 36 rotates to a vertical or substantially vertical state and is stopped.

  When the shutter curtain 8 is lowered and the lower end of the projecting bar 36 comes into contact with the floor surface, the shutter curtain 8 stops. Accordingly, a gap is generated between the lower end of the shutter curtain 8 and the floor surface by an amount of protrusion of the projecting bar 36 downward. Even if a person is caught in the gap formed by the projecting rod 36, the dimension is such that it does not cause a problem as much as possible, for example, 200 mm or more, the person is caught between the shutter curtain 8 and the floor surface. The unexpected situation can be avoided.

  FIG. 7 shows a second embodiment, and the engagement fitting 27 is omitted in the second embodiment.

  The end of the end of the panel 9 on the end of the panel 9 is pivotally attached to the corner bracket 34 via the support shaft 37, and the coil spring 38 urges the end of the extending bar 36 downward and clockwise in FIG. An upper limit stopper 44 formed in a crank shape is provided on the lower rod 35, and the upper limit stopper 44 is brought into contact with the upper side of the end of the tension rod 36. Therefore, the upper limit stopper 44 restricts the upward rotation of the tension bar 36.

  A guide pin 45 is provided at the upper end of the corner metal 34, and the wire 12 is bent by the guide pin 45 and is engaged with an engagement pin 46 fixed to the projecting rod 36.

  In a state in which the shutter curtain 8 is suspended by the wire 12, the tension rod 36 exerts a counterclockwise rotational force against the coil spring 38 due to the tension acting on the wire 12, and the tension rod The tip of 36 is in contact with the upper limit stopper 44.

  If the wire 12 is cut or the balance spring 13 is broken while the shutter curtain 8 is suspended from the wire 12, the tension of the wire 12 is lost or significantly reduced. Due to the urging force of 38, the strut rod 36 rotates in the clockwise direction, and the strut rod 36 projects vertically or substantially vertically below the lower rod 35. The corner metal fitting 34 functions as a stopper in the vertical state of the strut rod 36. The strut rod 36 may be directly attached to the reed. Thus, even when the shutter curtain 8 is lowered, a gap is formed between the lower end of the shutter curtain 8 and the floor surface by the protruding amount of the projecting rod 36.

  FIG. 8 shows a third embodiment.

  The engagement fitting 27 can be directly fitted to and detached from the lower end of the horizontal bar 40, a guide cylinder 48 is attached to the horizontal bar 40 in a vertical posture, and the projecting bar 36 is slidably fitted to the guide cylinder 48. A compression spring 49 is provided in the guide cylinder 48 to urge the strut rod 36 in the protruding direction. A notch 51 is formed on the side surface of the upper end portion of the tension rod 36, and a stopper 52 is attached to the side surface of the lower end portion of the guide cylinder 48. The stopper 52 is made of, for example, an elastic material, and the lower end portion 52a is bent in the horizontal direction, penetrates the side surface of the guide cylinder 48, and contacts the side surface of the tension rod 36 with an elastic force.

  When the shutter curtain 8 is suspended from the wire 12 and the wire 12 is unexpectedly cut or the balance spring 13 is broken and the tension of the wire 12 is lost or significantly reduced, the compression is performed. Due to the urging force of the spring 49, the engagement fitting 27 is removed from the horizontal bar 40, and the projecting bar 36 protrudes from the lower surface of the lower bar 35.

  When the notch 51 reaches the lower end 52a, the lower end 52a is engaged with the notch 51, restrains the protrusion of the tension bar 36, and a force in the compression direction acts on the tension bar 36. It becomes a stopper between.

  Thus, when the shutter curtain 8 is lowered, a gap is formed between the lower end of the shutter curtain 8 and the floor surface by the protruding amount of the tension rod 36.

  In both the first embodiment and the third embodiment, an upper limit stopper may be provided for the strut rod 36 so that the wire 12 is directly engaged with the strut rod 36. Moreover, although demonstrated as a wire which is a linear member, other linear members, such as a belt and a chain, may be sufficient.

  The present invention can be applied even if a part of the shutter curtain is a panel, and is not limited to either a manual type or an electric type.

1 is an overall schematic diagram showing an embodiment of the present invention. It is A arrow directional view of FIG. It is a B arrow line view of FIG. It is a perspective view which shows the principal part of 1st Embodiment. It is a front view which shows the principal part of 1st Embodiment. It is a perspective view which shows the effect | action of 1st Embodiment. It is the front schematic which shows the principal part of 2nd Embodiment. It is the front schematic which shows the principal part of 3rd Embodiment. It is a perspective view which shows the conventional shutter apparatus. It is a perspective view of the fall prevention device in the conventional shutter device.

Explanation of symbols

6 Winding shaft 8 Shutter curtain 9 Panel 11 Drum 12 Wire 13 Balance spring 22 Chain opening / closing mechanism 27 Engagement fitting 28 Outer piece 33 Wire engagement pin 34 Corner fitting 36 Tightening rod 38 Coil spring 39 Stopper 44 Upper limit stopper 46 Engagement pin 48 Guide cylinder 49 Compression spring 51 Notch 52 Stopper

Claims (6)

In a shutter device having a shutter curtain having at least a lower end portion constituted by a panel, and a linear member being attached to and suspended from the lower end of the shutter curtain, the shutter panel is vertically or substantially perpendicular to the lowermost panel. A projecting member is provided on the projecting member, the linear member is connected to the projecting member, and the projecting member is applied with a tension acting on the linear member in a state where the shutter curtain is suspended by the linear member. upholstery member is stored, the tension of the linear member is the brace member when it becomes less than a predetermined value is maintained protruded state with protruding vertical or substantially vertical position downwards, the lower end of the projecting tension member the shutter curtain abuts against the floor surface is stopped, and characterized by being configured protrusion amount just like gap arising downward of the brace member is provided between the lower end and the floor surface of the shutter curtain Yatta apparatus.   The shutter device according to claim 1, wherein the projecting member is rotatably supported, and the projecting member is urged to rotate in a projecting direction by a spring.   2. The shutter device according to claim 1, wherein the tension member is slidably supported in a vertical direction, and the tension member is biased downward by a spring.   The shutter device according to claim 1, wherein the linear member is directly connected to the projecting member.   An engagement fitting is removably provided at the width end of the lowermost panel, the linear member is engaged with the engagement fitting, the engagement fitting is fitted into the panel, and the linear member So that the protruding member is prevented from protruding in a state where the tension is applied to the tension member, and the engagement fitting is detached by the urging force acting on the tension member when the tension of the linear member becomes a predetermined value or less. The shutter device according to any one of claims 1 to 3, which is configured.   The shutter device according to claim 1, wherein the gap formed by the projecting member is 200 mm or more.

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