JP5693165B2 - Overhead door - Google Patents

Description

  The present invention relates to an overhead door that opens and closes an opening, such as a doorway of a building structure such as a building, with a shutter curtain configured by connecting a required number of panels in a freely bendable manner.

  There is a shutter device as an opening and closing means for opening and closing an opening of a building structure such as a building, and there is an overhead door as one of the shutter devices, in which the shutter curtain bends the required number of panels. The shutter curtain is moved up and down along the guide rail, and the shutter curtain is stored along the ceiling surface when opened.

  In the overhead door, the weight of the shutter curtain is balanced by the upward biasing force of the balance spring to reduce the load on the opening / closing device when the shutter curtain is opened / closed.

  The overhead door is opened and closed by a chain or a hoist switch via a wire wound around the winding drum, but the panel is not lowered during the opening and closing operation, particularly during the closing operation. As a result, the wire tension may be loosened and the wire may come off the drum.

  Conventionally, as a means for solving the above problems, a wire tensioner is provided in the vicinity of the winding drum, and the wire tensioner is operated when the wire is loosened to maintain the tension of the wire.

  In FIG. 8, a wire tensioner which is a conventional wire tension holding means will be described.

  A horizontal winding drum shaft 1 is rotatably provided above the opening (not shown), and a wire 3 is wound around a winding drum 2 fixed to both ends of the winding drum shaft 1. The wire 3 is fed out from the winding drum 2, and the wire 3 is engaged with a lowermost panel (not shown) of a shutter curtain (not shown).

  A wire tensioner 4 is provided inside the winding drum 2. The wire tensioner 4 has a U-shaped cross section and is attached to the housing 6 by a fixing tool 5 such as a bolt, and the winding drum shaft 1 passes therethrough. A bracket 7, a shaft 8 penetrating the bracket 7 so as to be rotatable in the horizontal direction, a spring 9 fitted to the shaft 8, and an L-shaped arm fixed to the end of the shaft 8 and rotating integrally. 11 and a roller 12 rotatably provided on a horizontal portion of the arm 11. The spring 9 biases the arm 11 so as to rotate in the direction in which the wire 3 is wound around the winding drum 2, for example, indoors.

  The roller 12 is located on the outdoor side of the wire 3. When the wire 3 is loosened for some reason, the arm 11 rotates via the shaft 8, and the roller 12 holds the wire 3. By pulling inward, the tension of the wire 3 is maintained. The arm 11 is curved toward the housing 6 so as not to interfere with the winding drum shaft 1 when the shaft 8 rotates.

  However, when the wire tensioner 4 is provided, it is necessary to fix the bracket 7 to the casing 6, so it is necessary to newly provide a base for fixing the bracket 7 on the casing 6, which is a work at a high place. . Further, since the wire tensioner 4 itself is a large-scale device, there is a problem that it is expensive and takes up space.

JP-A-2005-282126

  In view of such circumstances, the present invention provides an overhead door that maintains wire tension even when wire loosening occurs, prevents the wire from coming off the drum, and saves space and costs.

  The present invention relates to a shutter curtain configured by flexibly connecting a required number of panels, a winding drum provided at both ends of a shaft and biased in a winding direction by a balance spring, and the winding drum. And a wire having a lower end engaged with the lowermost panel of the shutter curtain, and provided with wire loosening prevention devices on both end surfaces of the lowermost panel, and the wire loosening prevention device provides loosening of the wire. This relates to an overhead door that absorbs water.

  According to the present invention, the wire loosening prevention device includes a rotating plate rotatably provided on the side end surface, two pins projecting from the rotating plate, and the two pins of the rotating plate. And a spring provided to urge the rotating plate in a rotating direction. The wire is wound around the two pins in an S shape, and the spring is the wire. This relates to an overhead door that rotates the rotating plate according to the looseness of the door.

  According to the present invention, the wire loosening prevention device is urged in a direction to rotate the rotating plate, at least one pin projecting from the rotating plate, and a rotating plate provided rotatably on the side end surface. And the wire is related to an overhead door in which the pin is hooked on the side end surface of the panel, and the rotating plate is rotated according to the looseness of the wire. is there.

  Furthermore, in the present invention, the wire loosening prevention device has an engaging pin that is provided on a side end surface of the lowermost panel and is movable in the vertical direction, and a spring that biases the engaging pin downward. The overhead door is such that the wire is engaged with the engagement pin.

  According to the present invention, a shutter curtain configured by flexibly connecting a required number of panels, a winding drum provided at both ends of the shaft and biased in a winding direction by a balance spring, and the winding drum A wire wound around a drum and having a lower end engaged with a lowermost panel of the shutter curtain, and provided with wire loosening prevention devices on both end surfaces of the lowermost panel, and the wire loosening prevention device provides the wire So that the shutter curtain can be prevented from being unable to open and close when the wire is loosened, and the wire loosening prevention device has a simple configuration, Space can be saved.

  According to the present invention, the wire loosening prevention device includes a rotating plate rotatably provided on the side end surface, two pins projecting from the rotating plate, and the two pins of the rotating plate. A shaft provided between the two pins, and a spring provided to urge the rotating plate in a rotating direction. The wire is wound around the two pins in an S shape, and the spring is Since the rotating plate is rotated according to the looseness of the wire, it is not necessary to perform work other than the bottom panel when the wire loosening prevention device is provided, and labor and cost can be reduced, and the existing overhead door It can be easily applied to.

  According to the present invention, the wire loosening prevention device includes a rotating plate rotatably provided on the side end surface, at least one pin protruding from the rotating plate, and a direction in which the rotating plate is rotated. A spring provided to urge the wire, the wire is hooked on the side end surface of the panel by hooking the pin, and the rotating plate is rotated according to the looseness of the wire. When installing a device for preventing looseness, it is not necessary to perform any work other than the bottom panel, which can reduce labor and cost, and can be easily applied to existing overhead doors. The size can be easily increased to increase the amount of absorption.

  Furthermore, according to the present invention, the wire loosening prevention device includes an engaging pin that is provided on a side end surface of the lowermost panel and is movable in the vertical direction, and a spring that biases the engaging pin downward. Since the wire is engaged with the engagement pin, it is not necessary to perform any work other than the lowermost panel when the wire loosening prevention device is provided. The excellent effect that the reduction of the amount can be achieved.

It is a schematic perspective view of the overhead door by which this invention is implemented. It is the same front sectional view. It is a front view of the wire loosening prevention mechanism in the 1st example of the present invention, and (A) shows normal time and (B) shows the time of operation of a wire loosening prevention mechanism. 2A and 2B are side views of a wire loosening prevention mechanism according to the first embodiment of the present invention, in which FIG. It is a front view of the wire loosening prevention mechanism in the 2nd example of the present invention, (A) shows normal time and (B) shows the time of operation of a wire loosening prevention mechanism. It is a side view of the wire loosening prevention mechanism in the 2nd example of the present invention, (A) shows normal time and (B) shows the time of operation of a wire loosening prevention mechanism. It is a front view which shows the modification of the wire loosening prevention mechanism in this invention, (A) is normal time, (B) has shown the time of the action | operation of a wire loosening prevention mechanism. It is a principal part enlarged front view which shows the conventional wire tensioner.

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

  First, referring to FIGS. 1 and 2, an overhead door according to an embodiment of the present invention will be described. In addition, the same code | symbol is attached | subjected to the thing equivalent to what was shown in FIG.

  A vertical guide rail 15 is provided along both side pillars 14 of the opening 13 of the housing 6 such as a building, a horizontal guide rail 16 is provided along the ceiling, and the vertical guide rail 15 and the horizontal guide rail 16 are They are connected by a curved rail 17. A horizontal take-up drum shaft 1 and the like are provided above the vertical guide rail 15.

  The shutter curtain 18 is formed by connecting a required number of panels 19 so as to be freely bent, and guide rollers 21 are rotatably provided at both ends of each panel 19 via a support shaft (not shown).

  The guide roller 21 is rotatably fitted to the vertical guide rail 15, the curved rail 17, and the horizontal guide rail 16, and the shutter curtain 18 is fitted to the vertical guide rail 15, the curved rail 17, and the horizontal guide. It can slide along the rail 16.

  The take-up drum shaft 1 is rotatably provided on the housing 6 side (the side column 14 in the drawing) via a bracket 22. Winding drums 2 are provided at both ends of the winding drum shaft 1, and the wire 3 wound around the winding drum 2 is engaged with the engaging pins 23 of the lowermost panel 19 of the shutter curtain 18. Has been. The take-up drum shaft 1 is provided with a balance spring 24, which urges the shutter curtain 18 in the upward direction via the wire 3.

  When the opening 13 is opened, the winding drum 2 is rotated via the winding drum shaft 1 to wind the wire 3, and the shutter curtain 18 is moved along the vertical guide rail 15. It is pulled up and further stored in the horizontal guide rail 16.

  When the opening 13 is closed, the winding drum 2 is rotated in the reverse direction via the winding drum shaft 1, the wire 3 is fed out, and the shutter curtain 18 is lowered by its own weight, The opening 13 is closed.

  In the present embodiment, a wire loosening prevention mechanism is provided on both end faces of the lowermost panel 19 so as to absorb the loosening and maintain the tension of the wire 3 even when the wire 3 is loosened.

  A first embodiment of the present invention will be described with reference to FIGS. 3 (A), 3 (B) and 4 (A), 4 (B). 3A, 3B, and 4A, 4B are enlarged views of the end of the lowermost panel 19, respectively. In FIGS. 3A and 3B, the left side with respect to the paper surface is the outdoor side, and the right direction with respect to the paper surface is the indoor side.

  The lower end of the wire 3 is bent and folded back, and the wire 3 and the bent portion are bundled by a wire bundling member 25 such as a sleeve to form a ring-shaped engagement portion 26, and the engagement portion 26 is connected to the engagement portion 26. The wire 3 is engaged with the lowermost panel 19 by being hooked on the contact pin 23.

  Further, a waterproof draining seal 20 is provided at the lower end of the panel 19 and a wire loosening prevention device 27 is provided above the engaging pin 23 on the end face. The wire loosening prevention device 27 includes a pedestal 28, a shaft 29, a torsion spring 31, a rotating plate 32, an upper latch pin 33, and a lower latch pin 34.

  The pedestal portion 28 is a plate-like member molded from metal or the like, and is fixed to the side end surface of the lowermost panel 19 at two upper and lower portions by screws 37 or the like. The shaft 29 is erected and fixed to the center of the base portion 28 in the vertical direction, and the rotating plate 32 is rotatably provided on the shaft 29.

  Further, the torsion spring 31 is fitted around the shaft 29, and both ends of the torsion spring 31 are engaged with the rotating plate 32 and the pedestal portion 28, respectively. The rotating plate 32 is supported by the torsion spring 31. It is urged clockwise in FIG.

  The upper latch pin 33 and the lower latch pin 34 each having a cylindrical shape protrude from the longitudinal end portion of the rotating plate 32, and are provided at the tips of the upper latch pin 33 and the lower latch pin 34. The upper latch pin flange 38 and the lower latch pin flange 39 are respectively formed, and the upper latch pin 33 is an upper roller that is rotatable between the upper latch pin flange 38 and the rotary plate 32. 35 and the lower latch pin 34 has a lower roller 36 that is rotatable between the lower latch pin flange 39 and the rotary plate 32.

  The wire 3 comes into contact with the indoor side of the upper roller 35 and is further hooked to the engaging pin 23 so as to come into contact with the outdoor side of the lower roller 36, and the wire loosens. Since the rotation plate 32 is urged clockwise in the prevention device 27, when the wire 3 is loosened, the rotation plate 32 rotates around the shaft 29, and the upper latch pin 33 and The wire 3 is wound up by a lower latch pin 34. The upper latch pin flange 38 and the lower latch pin flange 39 prevent the wire 3 from being detached from the upper latch pin 33 and the lower latch pin 34.

  The urging force of the torsion spring 31 is strong enough not to wind the wire 3 even when the tension of the balance spring 24 is minimized while the shutter curtain 18 is normally lowered. It is said.

  In the state where most of the panel 19 is stored in the horizontal guide rail 16 during the opening / closing operation of the shutter curtain 18, for example, the closing operation, most of the wire 3 is wound around the winding drum 2. The amount of bending of the balance spring 24 is reduced, and the tension acting on the wire 3 is also reduced. When the tension of the wire 3 is small, the wire loosening prevention device 27 is slightly bent by the biasing force of the torsion spring 31 as shown in FIG.

  As the shutter curtain 18 is lowered, the weight of the panel 19 increases and the amount of bending of the balance spring 24 also increases, increasing the tension of the wire 3. The panel 19 is set so that its own weight becomes larger than the urging force of the balance spring 24, and the difference between the urging force of the balance spring 24 and the own weight of the panel 19 does not fluctuate. Immediately before the shutter curtain 18 is completely lowered, that is, when the tension of the wire 3 is maximum, the wire 3 between the winding drum 2 and the engaging pin 23 is linear, The rotating plate 32 is rotated slightly counterclockwise from the vertical state.

  When the shutter curtain 18 is completely lowered and the draining seal 20 comes into contact with the ground, the difference between the urging force of the balance spring 24 and the total weight of the panel 19 is applied to the ground as a load. Since the urging force of the balance spring 24 is applied to 19, the tension of the wire 3 is not weakened, and the state where the rotating plate 32 is rotated counterclockwise is maintained.

  In the above-described process, the shutter curtain 18 is attached to the winding drum 2 due to friction between the panel 19 and the horizontal guide rail 16 or because the panel 19 is in contact with the vertical guide rail 15. When the wire 3 does not descend in conjunction with the feeding of the wire 3, the feeding of the wire 3 increases with respect to the descending amount of the shutter curtain 18.

  At this time, when the wire 3 is drawn out more than the lowering amount of the shutter curtain 18, the wire 3 is loosened and the tension becomes weaker than the urging force of the torsion spring 31, so that the wire loosening prevention device 27 operates. As shown in FIG. 3B, the upper plate 35 and the lower roller 36 that are in contact with the wire 3 rotate while the rotating plate 32 rotates in the clockwise direction. The wire 3 is wound around the latch pin 33 and the lower latch pin 34, tension is generated between the winding drum 2 and the upper latch pin 33, and the wire 3 is loosened. Tension is maintained without any problems.

  Since the upper latch pin 33 and the lower latch pin 34 are in contact with the wire 3 via the upper roller 35 and the lower roller 36, the upper roller in the process of winding the wire 3 35 and the lower roller 36 rotate, no friction is generated between the upper latch pin 33 and the lower latch pin 34 and the wire 3, and the urging force by the torsion spring 31 is not reduced. Wear caused by rubbing between the wire 3 is transmitted to the wire 3 and between the upper latch pin 33 and the lower latch pin 34 and the wire 3 is prevented.

  Further, the wire loosening prevention device 27 can absorb the looseness of the wire 3 by about 300 mm to 400 mm, but the length of the rotating plate 32 in the longitudinal direction is increased, or a plurality of the wire loosening prevention devices 27 are provided. By providing and the like, the looseness of the wire 3 can be absorbed more.

  As described above, the wire loosening prevention device 27 is provided on both end faces of the lowermost panel 19, and when the tension of the wire 3 is weakened, the wire loosening prevention device 27 winds up the wire 3, and the wire 3 Therefore, the shutter curtain 18 does not descend for some reason, the tension of the wire 3 fed out from the winding drum 2 is loosened, and the wire 3 comes off from the winding drum 2. The shutter curtain 18 can be prevented from being unable to open and close.

  Further, since the wire loosening prevention device 27 is provided on the side end surface of the lowermost panel 19, there is no need to newly provide a base for the housing 6 in order to install the wire loosening prevention device 27 on the housing 6. In addition, the work is performed on the ground, so that labor can be reduced and the present invention can be easily applied to an existing overhead door.

  Further, since the wire loosening prevention device 27 has a smaller and simpler structure than a wire tensioner that is a conventional wire tension holding means, space saving and cost reduction in manufacturing can be achieved.

  Next, referring to FIGS. 5A and 5B and FIGS. 6A and 6B, a second embodiment of the present invention will be described. 5A, 5B, and 6A, 6B are enlarged views of the end of the lowermost panel 19, respectively. 5 (A) (B), 6 (A) (B), and FIG. 3 (A) (B), FIG. The description is omitted. 5A and 5B, as in the first embodiment, the left direction with respect to the paper surface is the outdoor side and the right direction with respect to the paper surface is the indoor side.

  Similarly to the wire loosening prevention device 27 of the first embodiment, the wire loosening prevention device 41 in the second embodiment is also provided above the engaging pins 23 on both side end surfaces of the lowermost panel 19.

  The wire loosening prevention device 41 includes a pedestal portion 43 fixed to a side end surface of the lowermost panel 19 by a fixing tool 42 such as a screw, a shaft 44 erected and fixed to the pedestal portion 43, and the shaft 44. A rotating plate 45 having an end on the back in the longitudinal direction rotatably attached thereto, a torsion spring 46 fitted around the shaft 44 to urge the rotating plate 45 in a clockwise direction, and the rotating plate 45 It consists of a cylindrical upper latch pin 47 and a lower latch pin 48 that project from both end surfaces in the longitudinal direction.

  The upper latch pin 47 and the lower latch pin 48 are respectively formed with an upper latch pin flange 49 and a lower latch pin flange 51 at their tips, and the upper latch pin flange 49, the rotary plate 45, and the lower An upper roller 52 and a lower roller 53 are provided between the latch pin flange 51 and the rotating plate 45, respectively. The lower latch pin 48 is concentric with the shaft 44, and the rotating plate 45 rotates around the lower latch pin 48 as a rotation center.

  When the shutter curtain 18 is closed, when the wire 3 is wound up and most of the panel 19 is stored in the horizontal guide rail 16, the urging force of the balance spring 24 (see FIG. 1) is small. The tension of the wire 3 is also weakened, and the wire loosening prevention device 41 is slightly bent as shown in FIG.

  When the shutter curtain 18 descends, the tension of the wire 3 increases due to an increase in the biasing force of the balance spring 24 and an increase in the weight of the panel 19. When the tension exceeds the urging force of the torsion spring 46, the rotating plate 45 is slightly tilted counterclockwise. Even after the descent of the shutter curtain 18 is completed and the draining seal 20 comes into contact with the ground, the urging force of the balance spring 24 acts on the panel 19 and the tension of the wire 3 is maintained, so that the rotating plate is maintained. The state of 45 does not change.

  In the above process, when the shutter curtain 18 does not descend for some reason and the wire 3 is fed out from the winding drum 2 (see FIG. 2), the tension of the wire 3 is loosened and the tension is reduced. Since it becomes weaker than the urging force of the torsion spring 46, the wire loosening prevention device 41 operates. When the wire loosening prevention device 41 is actuated, as shown in FIG. 5B, the rotating plate 45 rotates clockwise while the lower roller 53 rotates around the lower latch pin 48. Thus, the wire 3 is wound around the upper latch pin 47, tension is generated between the winding drum 2 and the upper latch pin 47, and the wire 3 is tensioned without loosening. And the wire 3 can be prevented from coming off the winding drum 2.

  In the second embodiment, the upper latch pin 47 and the lower latch pin 48 are provided with an upper roller 52 and a lower roller 53, respectively. However, the lower latch pin 48 is concentric with the shaft 44. Since the friction generated between the lower latch pin 48 and the wire 3 is slight, the lower roller 53 may be omitted.

  Further, since the rotating plate 45 is rotated indoors around the shaft 44 provided concentrically with the lower latching pin 48, the rotating plate 45 becomes a housing when the wire loosening prevention device 41 is operated. 6 (see FIG. 2) does not collide. Further, it is possible to increase the size of the rotating plate 45 in order to increase the amount of absorption of the wire 3.

  Also in the case of the second embodiment, as in the first embodiment, the amount of loosening of the wire 3 can be increased by increasing the number of the wire loosening prevention devices 41 provided.

  Further, even when the lower latch pin 48 is omitted and the wire 3 is hooked from the indoor side of the upper latch pin 47 and the wire 3 is engaged with the engagement pin 23, the wire is prevented from loosening. The device 41 can absorb the looseness of the wire 3.

  In the wire loosening prevention devices of the first and second embodiments, the rotating plate is rotated by a torsion spring, and the wire is wound by the upper and lower latch pins to absorb the looseness of the wire. However, other structures may be used as long as the tension of the wire can be maintained when the wire is loosened, and FIGS. 7A and 7B show modified examples thereof.

  The wire loosening prevention device 54 in the modified example is provided with engagement pins 23 provided on the side end surfaces of both ends of the lowermost panel 19 and engaged with the wires 3 via the engagement portions 26, and A long hole 55 formed in the side end surface of the lowermost panel 19 so as to penetrate and the engaging pin 23 is movable in the vertical direction, and a locking pin protruding below the long hole 55 56 and a coil spring 57 which is connected to the engaging pin 23 and the locking pin 56 and biases the engaging pin 23 downward.

  In the case of the above modification, the wire 3 is always urged downward by the coil spring 57 via the engaging pin 23, and the shutter curtain 18 does not descend for some reason, and the wire 3 is loosened. In addition, the engaging pin 23 moves downward through the elongated hole 55.

  Therefore, even when the wire 3 is loose, the tension of the wire 3 can be maintained, so that the wire 3 can be prevented from coming off from the winding drum 2 due to the loosening, and further, the deformation can be prevented. The example has a simple configuration and can be implemented at low cost.

DESCRIPTION OF SYMBOLS 1 Winding drum shaft 2 Winding drum 3 Wire 18 Shutter curtain 19 Panel 23 Engaging pin 27 Wire loosening prevention device 29 Shaft 31 Torsion spring 32 Rotating plate 33 Upper latching pin 34 Lower latching pin 41 Wire loosening prevention device 44 45 Rotating plate 46 Torsion spring 47 Upper latch pin 48 Lower latch pin 54 Wire loosening prevention device 55 Long hole 57 Coil spring

Claims (3)

A shutter curtain configured by flexibly connecting a required number of panels, a winding drum provided at both ends of the shaft and biased in a winding direction by a balance spring, and a lower end wound around the winding drum There comprising a wire which is engaged with the engaging pin provided on a side end face lower end of the lowermost panel of the shutter curtain, and said wire slack preventing device provided on both end faces of the lowermost panel, the The wire loosening prevention device comprises: a shaft provided on the upper side of the engaging pin; a rotating plate provided rotatably around the shaft; two pins projecting from the rotating plate; and the shaft. A spring provided to urge the rotating plate in the direction of rotation as a center of rotation, and the pin adjacent to the engaging pin of the two pins is concentric with the shaft; Ya is wound around S-shape pins of the two, the overhead door, characterized in that said spring in response to loosening of the wire rotates the rotary plate, to absorb the slack of the wire.   The rotating plate is urged by the spring in the direction of winding the wire, and the urging force of the spring is strong enough not to wind the wire when the shutter curtain is normally lowered. The overhead door of claim 1.   3. The overhead door according to claim 2, wherein in a state where the shutter curtain is completely lowered, the tension of the wire is not weakened and the state where the rotating plate is rotated in the anti-winding direction is maintained.

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