JP2017218822A - Opening/closing device of overdoor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an opening/closing device of an overdoor capable of automatically performing opening/closing movement of an overdoor curtain, without compromising an original advantage of the opening/closing device of the overdoor.SOLUTION: An opening/closing device 1 of an overdoor includes: a pair of right and left guide rails 10 respectively having a vertical rail part 11 and a horizontal rail part 12; and an overdoor curtain 20 formed by rotatably connecting a plurality of slats 21. The opening/closing device 1 for the overdoor further includes: a rotor 60 disposed at a position deeper inside of a storage space 3 than a vertical rail part of each guide rail and below a horizontal rail part, and rotatable around a central line in a state that the central line is aligned with a top edge of a gateway 2; a driver 61 fitted on a rotor; and an electric motor for rotatingly driving the rotor. The driver 61 includes a plurality of engaging parts 69 engaged with a connection part between slats on a rear surface side of an overdoor curtain.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an overdoor opening / closing device that is a kind of architectural shutter that opens and closes an entrance of a building such as a garage or a warehouse.

  In general, this type of overdoor opening and closing device is, for example, as described in Patent Document 1, a pair of left and right guide rails each having a vertical rail portion and a horizontal rail portion, and opening and closing movement along both guide rails. With overdoor curtains. The vertical rail portion of each guide rail is provided substantially vertically along the side edge of the entrance / exit of the building, and the horizontal rail portion of each guide rail is directed from the upper edge side of the entrance / exit toward the back side of the storage space of the building. It is provided substantially horizontally. Moreover, the overdoor curtain is comprised by connecting the some slat so that rotation is possible.

  As the overdoor opening / closing device, there is an automatic type that automatically opens and closes the overdoor curtain. An example of this automatic overdoor opening and closing device includes, as described in Patent Document 1, a wire having one end connected to an overdoor curtain, a winding drum in which the other end of the wire is wound, and a winding drum And an electric motor that rotates and rotates the winding drum and winds the wire around the winding drum or sends the wire out of the winding drum to open and close the over curtain.

Japanese Utility Model Publication No. 7-4774

  By the way, in the overdoor opening and closing device, when the overdoor curtain is raised and the doorway is opened, the overdoor curtain is supported by the horizontal rail portion of the guide rail and stored in a substantially horizontal state along the ceiling portion of the garage or the like. . For this reason, the overdoor opening / closing device has a lower ceiling or a higher entrance / exit than a normal shutter opening / closing device that winds and stores a shutter curtain on a winding drum provided on the upper edge of the doorway. There is an advantage that the height can be increased.

  However, in the automatic overdoor opening and closing device described in Patent Document 1, since the winding drum and the electric motor are disposed above the horizontal rail portion of the guide rail, the height of the ceiling portion can be lowered accordingly. There is a problem that it becomes impossible to increase the height of the doorway.

  The present invention has been made in view of the above points, and its object is to provide an overdoor opening / closing device capable of automatically opening and closing an overdoor curtain without impairing the inherent advantages of the overdoor opening / closing device. It is in.

  In order to solve the above-described problems, the present invention provides an overdoor opening / closing device as a vertical rail portion provided along a side edge of a building doorway and an upper edge side of the doorway toward the back side of the storage space of the building. It is assumed that a pair of left and right guide rails each having a horizontal rail portion provided and an overdoor curtain that is formed by connecting a plurality of slats so as to be rotatable and can be opened and closed along the both guide rails. To do. And this invention is the state which the centerline followed the upper edge of the said entrance / exit in the position in the back | inner side of the said storage space rather than the said vertical rail part of each said guide rail, and the said horizontal rail part. A rotating body arranged to be rotatable around the center line, and a driving body that is attached to the rotating body and has a plurality of engaging portions that engage with connecting portions of slats on the back side of the overdoor curtain, And an electric motor that rotationally drives the rotating body.

  In this configuration, when the rotating body is rotated around its center line by the electric motor, the driving body rotates integrally with the rotating body, and each engaging portion of the driving body is connected to the connecting portion between the slats on the back side of the overdoor curtain. By engaging and applying a pushing force to the overdoor curtain, the overdoor curtain opens and closes along the pair of left and right guide rails.

  Moreover, the rotating body is arranged in a state where the center line is along the upper edge of the entrance / exit at a position deeper in the storage space than the vertical rail portion of each guide rail and below the horizontal rail portion, It is not necessary to increase the height of the ceiling portion of the storage space or to reduce the height of the entrance / exit by the arrangement of the rotating body, the driving body and the electric motor, and the original advantage of the overdoor opening / closing device is not impaired. .

  Here, it is preferable that the rotating body is formed of a hollow cylindrical member, and the electric motor constitutes a driving unit of a tubular motor disposed in the rotating body.

  In this configuration, the electric motor constitutes the drive unit of the tubular motor disposed in the rotating body, and a power transmission mechanism that transmits power between the electric motor and the rotating body is also housed in the rotating body. The work at the installation site can be facilitated. Moreover, it can also contribute to size reduction of an overdoor opening / closing apparatus.

  The tubular motor preferably has a manual clutch. In this configuration, when the manual clutch is disengaged during a power failure or the like, the tubular motor does not become an operating load when the overdoor curtain is manually opened and closed, and the overdoor curtain is manually opened and closed smoothly. Can do.

  It is preferable to further include a balance mechanism that generates a pulling force that resists the lowering of the overdoor curtain due to its own weight.

  In this configuration, the balance mechanism generates a pulling force that resists the lowering of the overcurtain due to its own weight, so that the output of the electric motor required when the overcurtain is opened can be reduced.

  Further, the engaging force when each engaging portion of the driving body engages with the connecting portion is lower when the door curtain is lowered and the doorway is closed than when the door curtain is raised and the doorway is opened. It is preferable that the value is also large.

  In this configuration, the engaging force when each engaging portion of the driving body engages with the connecting portion, and hence the pushing force of the overdoor curtain, is greater during the closing movement than during the opening movement of the overdoor curtain. This is particularly effective when a large pushing force is required when the overdoor curtain is closed.

  According to the overdoor opening and closing device of the present invention, the opening and closing movement of the overdoor curtain can be automatically performed without impairing the original advantage of the overdoor opening and closing device, and thus, the effect excellent in practicality is achieved. .

FIG. 1 is a longitudinal side view showing a configuration of a main part of an overdoor opening and closing device according to an embodiment of the present invention. FIG. 2 is a longitudinal side view showing the configuration of the balance mechanism of the overdoor opening / closing device. FIG. 3 is a partially cut arrow view taken along line XX of FIG. FIG. 4 is an arrow view taken along line YY of FIG. FIG. 5 is an enlarged view of the vicinity of Z in FIG. It is an external view of the tubular motor used for the said overdoor opening / closing apparatus of FIG.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments that are modes for carrying out the present invention will be described with reference to the drawings.

  1 to 4 show an overall configuration of an overdoor opening / closing device 1 according to an embodiment of the present invention. The overdoor opening / closing device 1 is a kind of architectural shutter that opens and closes a doorway 2 of a building such as a garage or a warehouse, and is opened and closed along a pair of left and right guide rails 10 and 10 and both guide rails 10 and 10. The overdoor curtain 20 is provided. 1 to 4 show the front-rear direction, the up-down direction, and the left-right direction on the basis of a state where a person standing at the center of the storage space 3 of the building looks toward the entrance 2.

  Each guide rail 10 is provided substantially vertically from the upper edge side of the entrance / exit 2 toward the back side (rear) of the storage space 3 of the building, and the vertical rail portion 11 provided substantially vertically along the side edge of the entrance / exit 2. The horizontal rail portion 12 is provided. The vertical rail portion 11 is fixed to the side wall portion 4 of the storage space 3 and is formed in a U-shaped cross section so as to sandwich the side edge portion of the overdoor curtain 20. The curtain 20 is guided in the vertical direction.

  On the other hand, the horizontal rail portion 12 is made of a rod-shaped member having a rectangular cross section such as metal or synthetic resin, and is fixed to the side wall portion 4 of the storage space 3 via an angle-shaped support member. The horizontal rail portion 12 supports the side edge portion of the overdoor curtain 20 so as to be slidable in the front-rear direction, and cooperates with the upper edge portion of the side wall portion 4 of the storage space 3 and the ceiling portion 5. The side edges of the curtain 20 are guided in the front-rear direction.

  The overdoor curtain 20 is formed by connecting a plurality of slats 21, 21,. That is, it is a connection part for connecting two adjacent slats 21 and 21 so that rotation is possible, as shown in an enlarged detail in FIG. Curled portions 22 and 23 are formed. The upper curled portion 22 of the lower slat 21 is curved so as to open toward the outside (front) of the storage space 3, and the lower curled portion 23 of the upper slat 21 is placed inside the curled portion 22. Are connected so as to be rotatable, and the overdoor curtain 20 is constituted by the continuation of this connection structure. A seat plate 24 is connected to the slat 21 positioned at the lowermost end in the closed state of the over door curtain 20. When the over door curtain 20 is in the closed state, the seat plate 24 contacts the floor surface of the storage space 3. 2 is closed.

  Further, as shown mainly in FIGS. 3 and 4, the overdoor opening / closing device 1 includes a pair of left and right support cases 30, 30 attached to upper ends of left and right side edges of the doorway 2, and the weight of the overdoor curtain 20. And a balance mechanism 40 that generates a pulling force that resists the descent caused by.

  Each support case 30 includes a first support portion 32 that rotatably supports the guide roller 31 and a second support portion 33 that supports a rotating body 60 described later. The first support portion 32 is formed inside the support case 30, and the guide roller 31 is disposed in the support case 30 with a part thereof exposed forward and upward from the support case 30. The second support portion 33 is formed on the side surface of the support case 30 opposite to the attachment surface to the side wall portion 4 and exposed to the support case 30 side. Further, as shown in FIG. 1, the rotating shaft 34 of the guide roller 31 has a predetermined dimension (about the radius of the guide roller 31) on the back side (rear side) of the storage space 3 and the vertical rail portion 11 of each guide rail 10. It is arranged at a position below the horizontal rail portion 12 by a predetermined dimension (about the radius of the guide roller 31). Accordingly, the side edge portion of the overdoor curtain 20 is guided by the guide roller 31 between the vertical rail portion 11 and the horizontal rail portion 12 of each guide rail 10.

  As shown in FIG. 4, the balance mechanism 40 includes a wire fitting 41 (see FIG. 3), a pair of left and right wires 42, 42, a pair of left and right wire pulleys 43, 43, a pulley shaft 44, and a pair of left and right wires. Balance springs 45, 45 and a synchronization shaft 46 are provided.

  As shown in FIG. 3, the wire mounting bracket 41 is fixed to the slat 21 positioned at the upper end of the overdoor curtain 20 in the closed state. The wire mounting bracket 41 is a member that is elongated in the left-right direction, similar to the slat 21, and the length in the longitudinal direction (left-right direction) is set to be the same as that of the slat 21, and the length in the short direction (front-rear direction). Is set larger than that of the slat 21. The members 41 and 21 are fixed with bolts or the like in a state where a part of the slat 21 is covered from above with the wire mounting bracket 41. At both ends in the longitudinal direction of the wire mounting bracket 41, an anti-sway roller 47 is provided for suppressing displacement of the wire mounting bracket 41 and thus the overdoor curtain 20 in the left-right direction by contact with the side wall portion 4 of the storage space 3. It has been.

  One end of each of the pair of left and right wires 42 and 42 is connected via a connection fitting 48 at a longitudinal end portion of the wire attachment fitting 41 to a position in the horizontal direction center side of the storage space 3 with respect to the horizontal rail portion 12. As shown in FIG. 4, the other end of each wire 42 extends to the inner side of the storage space 3 and is fixedly connected to a corresponding wire pulley 43 by a stopper 49.

  The pulley shaft 44 is laid substantially horizontally between the left and right side wall portions 4, 4 on the back side of the storage space 3, and the left and right end portions of the pulley shaft 44 are respectively attached to the side wall portion 4 via a winding bracket 51. It is fixed. Each wire pulley 43 is rotatably supported at a position away from the side wall portion 4 on the side corresponding to the pulley shaft 44 by a predetermined distance.

  The pair of left and right balance springs 45 are disposed adjacent to the wire pulley 43 on the side opposite to the side wall portion 4 of the corresponding wire pulley 43 on the outer periphery of the pulley shaft 44. Each balance spring 45 is a torsion coil spring, one end of which is inserted into an insertion hole 52 (see FIG. 2) provided in the wire pulley 43, and the other end is attached to the pulley shaft 44 by a bolt 53. It is fixed.

  The synchronization shaft 46 connects the wire pulleys 43 and 43 to each other so that the pair of left and right wire pulleys 43 and 43 rotate in synchronization.

  Thus, when the overdoor curtain 20 operates in the descending direction (closing direction), the wire 42 connected to the slat 21 of the overdoor curtain 20 via the wire mounting bracket 41 is pulled forward, and the wire 42 is wound. The wire pulley 43 rotates. At that time, the balance spring 45 rotates in the winding direction. As a result, a pulling force that resists lowering due to the weight of the overdoor curtain 20 is generated.

  On the other hand, when the overdoor curtain 20 operates in the upward direction (opening direction), the tightening of the balance spring 45 tends to return, so that the overcurtain 20 is pulled up in the upward direction. Further, the wire 42 is wound around the wire pulley 43 as the over curtain 20 is raised.

  Further, the overdoor opening / closing device 1 is mainly composed of a rotating body 60, a pair of left and right drive bodies 61 and 61 mounted on the rotating body 60, and an electric motor that rotationally drives the rotating body 60, as shown in FIGS. A motor 62 (see FIG. 6).

  The rotating body 60 is formed of a hollow octagonal cylindrical member. The rotating body 60 is disposed between the pair of left and right support cases 30, 30 so that the center line 60 a is concentric with the rotation shaft 34 of the guide roller 31 and is rotatable around the center line 60 a. In other words, the rotating body 60 has a predetermined dimension (about the radius of the guide roller 31) from the vertical rail portion 11 of each guide rail 10 and a predetermined dimension (from the rear side) of the storage space 3 and from the horizontal rail portion 12 ( A center line 60a is disposed at a position below the radius of the guide roller 31 so as to be rotatable around the center line 60a along the upper edge of the entrance 2.

  As shown in FIG. 3, the right end of the rotating body 60 is fitted to the outer surface of a limit crown 75 of a tubular motor 70 described later and is rotatably supported by the limit crown 75. The end portion on the limit crown 75 side of the tubular motor 70 is supported in a fixed state by the second support portion 33 of the right support case 30 via a bearing support 63.

  On the other hand, an end member 64 is fitted and fixed inside the left end portion of the rotating body 60. The end member 64 has a shaft 65 that protrudes outward (leftward) concentrically with the center line 60 a of the rotating body 60, and this shaft 65 is connected to the second support case 30 on the left side via a bearing 66. The support part 33 is rotatably supported.

  The pair of left and right drive bodies 61 and 61 are respectively attached to corresponding end portions of the rotating body 60 in the left and right direction. As shown in FIG. 5, each driver 61 has a metal driver 61a and a plurality (eight in the figure) of synthetic resin caps 69, 69,. Do it. The drive body main body 61a is a substantially circular plate having substantially the same diameter as the guide roller 31, and an octagonal center hole 67 corresponding to the rotary body 60 is provided at the center of the drive body main body 61a. It has been. A flange portion is formed at the peripheral edge of the center hole 67. The driving body 61 is fixed to the rotating body 60 by fitting the rotating body 60 into the center hole 67 and screwing the flange portion to the rotating body 60 in this state.

  Further, a plurality of (eight in the figure) projecting portions 68, 68,... Projecting outward in the radial direction are formed at a predetermined pitch interval in the circumferential direction on the peripheral portion of the drive body 61a. A cap 69 is attached to the portion 68. The cap 69 is adapted to engage with curled portions 22 and 23 which are connecting portions between two adjacent slats 21 and 21 on the back side of the overdoor curtain 20. Here, the pitch interval of the protrusions 68 at the peripheral edge of the drive body 61a is set so that the caps 69 attached to the protrusions 68 are sequentially engaged with the curls 22 and 23 on the back side of the overdoor curtain 20, respectively. Has been. Of the curls 22 and 23 between the slats 21 and 21 on the back surface side of the overdoor curtain 20, the upper curl portion 22 of the lower slat 21 in the closed state of the overdoor curtain 20 is outside the storage space 3. Since the lower curled portion 23 of the upper slat 21 is rotatably engaged and connected to the inside of the curled portion 22, the driver is curved so as to open toward the front side. The engagement force when the caps 69 of the 61 are engaged with the curled portions 22 and 23 is that when the overdoor curtain 20 is lowered and the doorway 2 is closed, the overdoor curtain 20 is raised and the doorway 2 is opened. Is bigger than.

  The electric motor 62 constitutes a drive unit for the tubular motor 70 disposed in the rotating body 60. As shown in FIG. 6, the tubular motor 70 includes a tubular motor main body 71 including an electric motor 62 and a speed reducer, a drive wheel 73 and a manual clutch 74 provided on the output shaft 72 side of the tubular motor main body 71. The tubular motor main body 71 has a limit crown 75, a limit case 76, and a bracket support 77 provided at the end opposite to the output shaft 72 side.

  The drive wheel 73 is rotatably supported with respect to the output shaft 72 and receives power (rotational force) from the output shaft 72 via a manual clutch 74. The drive wheel 73 is formed in an octagonal shape with an axial contour corresponding to the inner peripheral surface of the rotating body 60. Accordingly, when the tubular motor 70 is disposed in the rotating body 60, the drive wheel 73 is fitted into the rotating body 60 and is integrally rotated with the rotating body 60.

  The manual clutch 74 includes a clutch case 81 fixed to the tubular motor body 71, a clutch lever 83 supported by the clutch case 81 so as to be swingable around a support shaft 82, a clutch support 84, a slide spring 85, a clutch A wire 86 and an operation unit 87 are provided.

  The clutch support 84 is coupled to a spline portion 72a formed on a part of the outer peripheral surface of the output shaft 72 so as to be slidable in the axial direction and integrally rotated. Although not shown, the clutch support 84 has a plurality of protrusions protruding toward the drive wheel 73, and these protrusions are fitted into holes provided in the drive wheel 73 so that the output shaft 72 can be The power is transmitted to the drive wheel 73. The slide spring 85 is for constantly pressing the clutch support 84 toward the drive wheel 73 so as to transmit power.

  One end of the inner 86 a of the clutch wire 86 is engaged with the clutch lever 83. The other end of the clutch wire 86 is connected to the operation unit 87. Then, when the clutch lever 83 is rotated counterclockwise around the support shaft 82 from the illustrated state by the operation of the operation unit 87, the clutch support 84 is moved away from the drive wheel 73 along with the rotation, and the power Transmission is interrupted.

  In FIG. 1 to FIG. 5, 91 is an upper collar constituting the upper edge of the doorway 2, 92 is a balance case for housing the balance mechanism 40, and the balance case 92 is the side wall 4 of the storage space 3. And fixed to the ceiling 5. Reference numeral 93 denotes a presser plate attached to the ceiling portion 5 of the storage space 3 corresponding to the drive body 61.

  Next, the effect of the overdoor opening / closing device 1 will be described. When the rotating body 60 is rotated around the center line 60a by the electric motor 62, the driving body 61 rotates integrally with the rotating body 60, and each cap 69 of the driving body 61 is over as shown in FIGS. By engaging the curled portions 22 and 23 that are the connecting portions of the slats 21 and 21 on the back side of the door curtain 20 and applying an extrusion force to the over door curtain 20, the over door curtain 20 is paired with left and right guides. It opens and closes along the rails 10 and 10.

  Moreover, the rotating body 60 is in a state in which the center line 60 a is along the upper edge of the entrance 2 at a position farther behind the storage space 3 than the vertical rail portion 11 of each guide rail 10 and below the horizontal rail portion 12. Therefore, it is not necessary to increase the height of the ceiling portion 5 of the storage space 3 or reduce the height of the entrance 2 by arranging the rotating body 60, the driving body 61, the electric motor 62, and the like. . For this reason, since the opening / closing movement of the overdoor curtain 20 can be automatically performed without impairing the original advantages of the overdoor opening / closing device 1, an effect excellent in practicality is achieved.

  In particular, in the present embodiment, the rotating body 60 is formed of a hollow octagonal cylindrical member, and the electric motor 62 constitutes a drive unit for the tubular motor 70 disposed in the rotating body 60. The speed reducer that transmits power between the motor 62 and the rotating body 60, the manual clutch 74, and the drive wheel 73 are also housed in the rotating body 60. For this reason, the work on the installation site can be facilitated, and the overdoor opening and closing device 1 can be contributed to the downsizing.

  The overdoor opening and closing device 1 includes a pair of left and right drive bodies 61 and 61, and each drive body 61 is mounted on each of the left and right ends of the rotating body 60. For this reason, since the application of the pushing force from the driving body 61 to the over curtain 20 is performed on both the left and right sides of the over curtain 20, the over curtain 20 can be opened and closed smoothly.

  In addition, the tubular motor 70 has a manual clutch 74. For this reason, when the manual clutch 74 is disengaged by operating the operating portion 87 of the manual clutch 74 during a power failure or the like, the tubular motor 70 does not become an operating load when the overdoor curtain 20 is manually opened and closed. The overdoor curtain 20 can be manually opened and closed smoothly.

  Furthermore, the overdoor opening and closing device 1 includes a balance mechanism 40 that generates a pulling force that resists the descent of the overdoor curtain 20 due to its own weight. Since the balance mechanism 40 generates a pulling force against the lowering of the overcurtain 20 due to its own weight, the output of the electric motor 62 required when the overcurtain 20 is opened can be reduced.

  In addition, the engagement force when the caps 69 of the driving body 61 are engaged with the curled portions 22 and 23 that are the connecting portions of the slats 21 and 21 on the back surface side of the over curtain 20, and the pushing force of the over curtain 20 is as follows. When the overdoor curtain 20 is moved downward, it is larger than the time when the overdoor curtain 20 is closed and the doorway 2 is closed than when the overdoor curtain 20 is lifted and the doorway 2 is opened. This is particularly effective when a large extrusion force is required.

  In addition, this invention is not limited to the said embodiment, A various other form is included. For example, in the embodiment, the side edge portion of the overdoor curtain 20 is guided by the guide roller 31 between the vertical rail portion 11 and the horizontal rail portion 12 of the guide rail 10. Instead of 31, it may be configured to guide using a corner rail portion curved in an arc shape.

  Moreover, in the said embodiment, the rotary body 60 was comprised with the hollow octagonal cylindrical member, and the electric motor 62 comprised the drive part of the tubular motor 70 arrange | positioned in this rotary body 60. FIG. However, in the present invention, the rotating body 60 may be configured by a polygonal cylindrical member or a cylindrical member other than a hollow octagon, or may be configured by a solid shaft member. In particular, in the latter case, it is necessary to secure the arrangement position of the electric motor outside the rotating body. At this time, the electric motor is housed in the storage space 3 more than the vertical rail portion 11 of the guide rail 10 as in the rotating body. What is necessary is just to arrange | position in the position below the horizontal rail part 12 in the back | inner side.

  Furthermore, in the said embodiment, although the drive body 61 was comprised with the metal drive body main body 61a and the several synthetic resin caps 69 and 69 which each comprise an engaging part, this invention is, Of course, the driving body having a plurality of engaging portions may be integrally formed of synthetic resin or metal.

DESCRIPTION OF SYMBOLS 1 Overdoor opening / closing apparatus 2 Entrance / exit 3 Storage space 10 Guide rail 11 Vertical rail part 12 Horizontal rail part 20 Overdoor curtain 21 Slats 22, 23 Curl part (connection part)
40 Balance Mechanism 60 Rotating Body 60a Center Line of Rotating Body 61 Drive Body 62 Electric Motor 69 Cap (engaging part)
70 Tubular motor 74 Manual clutch

In order to solve the above-described problems, the present invention provides an overdoor opening / closing device as a vertical rail portion provided along a side edge of a building doorway and an upper edge side of the doorway toward the back side of the storage space of the building. It is assumed that a pair of left and right guide rails each having a horizontal rail portion provided and an overdoor curtain that is formed by connecting a plurality of slats so as to be rotatable and can be opened and closed along the both guide rails. To do. And this invention is the state which the centerline followed the upper edge of the said entrance / exit in the position in the back | inner side of the said storage space rather than the said vertical rail part of each said guide rail, and the said horizontal rail part. A rotating body arranged to be rotatable around the center line, and a driving body that is attached to the rotating body and has a plurality of engaging portions that engage with connecting portions of slats on the back side of the overdoor curtain, An electric motor that rotationally drives the rotating body . Of the connecting portions between the slats on the back side of the over curtain, the upper connecting portion of the lower slat in the closed state of the over door curtain opens toward the outside of the storage space. The lower connecting portion of the upper slat is fitted into the connecting portion so as to be rotatably engaged, and each engaging portion of the driving body is connected to the inside of the connecting portion. The engaging force when engaging the connecting portion is configured to be larger when the overdoor curtain is lowered and the doorway is closed than when the overdoor curtain is raised and the doorway is opened .

Moreover, the rotating body is arranged in a state where the center line is along the upper edge of the entrance / exit at a position deeper in the storage space than the vertical rail portion of each guide rail and below the horizontal rail portion, It is not necessary to increase the height of the ceiling portion of the storage space or to reduce the height of the entrance / exit by the arrangement of the rotating body, the driving body and the electric motor, and the original advantage of the overdoor opening / closing device is not impaired. . Further, since the engaging force when each engaging portion of the driving body engages with the connecting portion, and hence the pushing force of the overdoor curtain, becomes larger during the closing movement than during the opening movement of the overdoor curtain, This is particularly effective when a large pushing force is required when the overdoor curtain is closed.

According to the overdoor opening and closing device of the present invention, the opening and closing movement of the overdoor curtain can be automatically performed without impairing the original advantage of the overdoor opening and closing device, and thus, the effect excellent in practicality is achieved. . Further, since the engaging force when each engaging portion of the driving body engages with the connecting portion, and thus the pushing force of the overdoor curtain, becomes larger during the closing movement than during the opening movement of the overdoor curtain, the balance mechanism allows the overdoor. This is particularly effective when a large pushing force is required when the curtain is closed.

FIG. 1 is a longitudinal side view showing a configuration of a main part of an overdoor opening and closing device according to an embodiment of the present invention. FIG. 2 is a longitudinal side view showing the configuration of the balance mechanism of the overdoor opening / closing device. FIG. 3 is a partially cut arrow view taken along line XX of FIG. FIG. 4 is an arrow view taken along line YY of FIG. FIG. 5 is an enlarged view of the vicinity of Z in FIG. FIG. 6 is an external view of a tubular motor used in the overdoor opening / closing device.

Each support case 30 includes a first support portion 32 that rotatably supports the guide roller 31 and a second support portion 33 that supports a rotating body 60 described later. The first support portion 32 is formed inside the support case 30, and the guide roller 31 is disposed in the support case 30 with a part thereof exposed forward and upward from the support case 30. The second support portion 33 is formed on the side surface opposite to the mounting surface of the support case 30 to the side wall portion 4 so as to be exposed outside the support case 30. Further, as shown in FIG. 1, the rotating shaft 34 of the guide roller 31 has a predetermined dimension (about the radius of the guide roller 31) on the back side (rear side) of the storage space 3 and the vertical rail portion 11 of each guide rail 10. It is arranged at a position below the horizontal rail portion 12 by a predetermined dimension (about the radius of the guide roller 31). Accordingly, the side edge portion of the overdoor curtain 20 is guided by the guide roller 31 between the vertical rail portion 11 and the horizontal rail portion 12 of each guide rail 10.

Claims (5)

A pair of left and right guide rails each having a vertical rail portion provided along a side edge of the entrance / exit of the building and a horizontal rail portion provided from the upper edge side of the entrance / exit toward the back side of the storage space of the building;
An overdoor opening and closing device comprising a plurality of slats rotatably connected and an overdoor curtain that is opened and closed along the both guide rails,
The center line can be rotated around the center line in a state where the center line is along the upper edge of the entrance / exit at a position deeper in the storage space than the vertical rail part of each guide rail and below the horizontal rail part. A rotating body arranged in
A drive body that is mounted on the rotating body and has a plurality of engaging portions that engage with connecting portions between the slats on the back side of the overdoor curtain,
An overdoor opening and closing device comprising: an electric motor that rotationally drives the rotating body.   2. The overdoor opening and closing device according to claim 1, wherein the rotating body is formed of a hollow cylindrical member, and the electric motor constitutes a driving unit of a tubular motor disposed in the rotating body. .   The overdoor opening and closing device according to claim 2, wherein the tubular motor has a manual clutch.   The overdoor opening and closing device according to any one of claims 1 to 3, further comprising a balance mechanism that generates a pulling force that resists a descent due to the weight of the overdoor curtain.   The engaging force when each engaging part of the driving body engages with the connecting part is that when the door curtain is lowered and the doorway is closed, the door curtain is raised and the doorway is opened. The overdoor opening and closing device according to claim 4, wherein the overdoor opening and closing device is larger than the time.

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