JP5621064B1 - Architectural shutter opening and closing machine - Google Patents

Abstract

The present invention provides an open / close device for a building shutter that can simplify installation work, reduce costs, and expand the application range. A brake unit 3 of an opening / closing machine includes a brake shaft 12 and a brake spring 14 that constantly urges the brake shaft in a braking direction. The automatic closing device 8 is provided so as to be slidable on one surface of the base plate, a bifurcated brake release lever 21, a base plate 22 attached in a vertical state perpendicular to the axial direction in the space of the brake portion. The slide plate 23, a load applying portion 24b for applying a downward load by contacting the other end of the brake release lever when the slide plate moves, a first spring for constantly urging the slide plate, a lock pin, , A lock plate, a swing restricting member, a second spring, a solenoid 30 attached to the other surface side of the base plate, and a manual return wire 31. [Selection] Figure 1

Description

  The present invention relates to an architectural shutter opening / closing device provided at a doorway or opening of a building, and more particularly, to a device equipped with a function of an automatic closing device that automatically lowers a shutter to close the doorway in the event of a fire. .

  Generally, as this type of architectural shutter, for example, as described in Patent Document 1, a shutter curtain that is a shutter body that opens and closes a doorway of a building, and an upper edge of an entrance / exit along the upper edge of a ceiling space An attached shutter box, a pair of left and right guide rails attached along the left and right sides of the doorway, a winding shaft supported horizontally and rotatably in the shutter box, and inside or outside the shutter box A switch that is attached and that drives the take-up shaft to rotate, and the shutter curtain is wound around the take-up shaft by the operation of the open / close device, or both ends are guided from the take-up shaft by a pair of left and right guide rails The one that automatically opens and closes the doorway by sending out To have.

  The opening / closing machine is usually formed by connecting a speed reduction unit, a motor unit, and a brake unit in order from the output shaft side in the axial direction. In this case, as described in the above-described Patent Document 1, the brake portion is provided so as to be slidable by a predetermined distance in the axial direction and a brake shoe coupled to the motor shaft of the motor portion so as to rotate integrally. A brake shaft, a brake drum that is coupled to one end of the brake shaft in a rotationally integrated manner and faces the brake shoe in the axial direction, and is disposed on the outer periphery of the brake shaft, and the brake drum and the brake drum are arranged on the brake drum. A brake spring that is constantly urged so as to be moved in the direction of pressure contact, and an electromagnetic clutch disposed on the opposite side of the brake drum facing the brake shoe. When the electromagnetic clutch is not energized, the brake portion is pressed against the motor shaft of the motor portion by pressing the brake shaft and the brake drum closer to the motor portion by the urging force of the brake spring to bring the brake drum into pressure contact with the brake shoe. As a result, braking force is generated and the motor shaft and thus the output shaft of the switch (decelerator) are stopped. On the other hand, when the electromagnetic clutch is energized, the magnetic force of the electromagnetic clutch moves the brake shaft and brake drum away from the motor against the urging force of the brake spring, releasing the pressure contact between the brake drum and the brake shoe. By doing so, the brake part is turned off (that is, the brake is released), and the motor shaft can be rotated by energizing the motor part.

  The brake part further has a brake release lever attached to the other end of the brake shaft, and an automatic closing device is attached to the outside of the brake part corresponding to the brake release lever. . In this automatic closing device, when a sensor detects heat or smoke in the event of a fire, the brake release lever is operated by an operating member based on the signal of the sensor to turn off the brake part and open the doorway The shutter curtain in the state is lowered by its own weight to close the doorway and to prevent fire and smoke.

  By the way, all of the conventional automatic closing devices are of the external type that can be attached to the outside of the brake part of the switch, but from the viewpoint of simplifying the installation work of the switch and thus the architectural shutter, the automatic closing is performed. There is a desire to store the device inside the switch.

  Therefore, in order to respond to such a request, the applicant changed the configuration of the brake release lever and used a keep solenoid, which is a self-holding solenoid, without causing an increase in the size of the switch. Have proposed an automatic closing device built-in type switch having a function of an automatic closing device that automatically performs a braking release operation and a return operation, and this proposed switch is already known (patent) Reference 2).

JP 2013-49948 A Japanese Patent No. 5284552

  However, the proposed opening / closing device has a problem that the cost is increased because the keep solenoid is more expensive than a normal solenoid.

  Moreover, since the keep solenoid is large in itself, there is a problem that the range of applicable switches can be narrowed. That is, as a kind of opening / closing machine, the brake shaft of the brake part is extended to the outside of the case of the brake part, and the brake shaft can be rotated by attaching an operation handle to the extended part of the brake shaft at the time of a power failure or the like In this type of switch, there is a problem that the keep solenoid cannot be disposed in the case of the brake unit without interfering with the brake shaft and cannot be applied.

  The present invention has been made in view of such a point, and the problem is that a normal solenoid is used instead of a keep solenoid, and each component of the automatic closing device is appropriately disposed in the case of the brake unit. , Providing a switch with a built-in automatic closing device that can perform braking release and return operations while reducing the size of the switch, thereby simplifying installation work, reducing costs, and expanding the scope of application It is to provide an architectural shutter opener to obtain.

In order to solve the above-mentioned problem, the invention according to claim 1 is configured as an opening / closing device for a shutter for construction, in which a reduction part, a motor part and a brake part are connected in order from the output shaft side in the axial direction. It is assumed that the brake shaft is provided so as to be movable by a predetermined distance in the axial direction, and a brake spring that constantly urges the brake shaft to move in the direction in which the braking force is generated. As a component of the automatic closing device, a bifurcated lever having a pair of leg portions extending so as to sandwich the brake shaft on one end side, the leg portions of the lever projecting inward from each other, and An engaging portion that engages with a flange member mounted on the outer peripheral surface of the brake shaft and a contact portion that contacts the case of the brake portion are formed, and when a downward load is applied to the other end side of the lever, With the contact portion as a fulcrum, an actuating force is applied to the brake shaft against the urging force of the brake spring against the brake shaft from the engagement portion via the flange member. A brake release lever, a base plate mounted perpendicular to the axial direction in the space of the brake part, and one surface of the base plate A slide plate provided between the first position and the second position in the vertical direction is slidably disposed in the striking plate attached to the slide plate, the brake release when the slide plate is located at the first position A load applying portion that is located above the other end of the lever and that abuts against the other end of the brake release lever and applies a downward load when the slide plate moves from the first position to the second position; A first spring that constantly urges the plate to be positioned at the second position; a lock pin that is attached to the slide plate and protrudes from the other surface side of the base plate through a long hole provided in the vertical direction in the base plate; The other side of the base plate is supported so as to be swingable around a support shaft, and the slide plate is positioned at the first position. A lock plate that engages with the lock pin to restrict the slide plate from moving from the first position to the second position by the biasing force of the first spring, and the lock plate on the other surface side of the base plate. A swing restricting member movably provided between a restricting position for restricting the swing of the plate and a release position for releasing the restriction, and a second bias that constantly urges the swing restricting member to be positioned at the restricting position. A spring, a solenoid attached to the other surface side of the base plate and having a plunger tip connected to the swing restricting member, and a manual return wire for returning the slide plate from the second position to the first position It is set as the structure provided with.

In this configuration, when the solenoid is not energized before the operation, the slide plate is located at the first position on the base plate, and the load applying portion of the striking plate attached to the slide plate is the other end side of the brake release lever. It is located above (the end opposite to the leg). The lock plate engages with the lock pin and restricts the slide plate from moving from the first position to the second position by the biasing force of the first spring. It is positioned by a biasing force of the second spring at a restricting position for restricting the swing.

  When the solenoid is energized from such a state, the plunger of the solenoid is attracted toward the solenoid body, and accordingly, the swing restricting member moves from the restricting position to the release position for releasing the restriction of the lock plate. As a result, the lock plate swings and the engagement between the lock plate and the lock pin is released, and the slide plate moves from the first position on the base plate to the second position by the biasing force of the first spring. When the load applying portion abuts against the other end of the brake release lever due to the movement of the slide plate and a downward load is applied, the brake release lever tilts with the contact portion of each leg as a fulcrum, and each leg Since an acting force that presses the brake shaft against the urging force of the brake spring against the urging force of the brake spring acts from the engagement portion of the portion to the brake shaft, braking of the brake portion is released.

  In addition, when the manual return wire is pulled to return to the original state after the brake releasing operation, the slide plate returns from the second position on the base plate to the first position, and the lock plate engages with the lock pin and the slide plate The movement from the first position is restricted. The swing restricting member returns to the restricting position by the urging force of the second spring and is positioned at the restricting position.

  According to a second aspect of the present invention, in the architectural shutter opening and closing device according to the first aspect, as a component of the automatic closing device, a transmission mechanism for transmitting the pulling operation force of the manual return wire to the slide plate is further provided. This transmission mechanism is freely rotatable via a support shaft to the base plate so as to mesh with a rack gear that is slidable in the vertical direction on the same surface as the slide plate of the base plate and below the slide plate. The upper end of the manual return wire is connected to the pinion gear, and when the lower end of the manual return wire is pulled, the upper end of the rack gear comes into contact with the lower end of the slide plate to The slide plate is lifted against the biasing force of the first spring to return the slide plate from the second position to the first position.

  In this configuration, the pulling force of the manual return wire is transmitted to the slide plate via the transmission mechanism, so that the slide plate returns from the second position on the base plate to the first position. Specifically, when the manual return wire is pulled, the pinion gear of the transmission mechanism rotates, and the rack gear meshing with the pinion gear slides upward on the same surface as the slide plate of the base plate, and accordingly, the upper end of the rack gear is the lower end of the slide plate The slide plate can be lifted against the urging force of the first spring in contact with the first spring, and the slide plate can be smoothly and reliably returned from the second position to the first position.

  As described above, according to the construction shutter opening and closing machine according to the present invention, the brake opening operation and the returning operation can be performed by the automatic closing device housed in the space of the brake portion. It is not necessary to perform an operation such as attaching the automatic closing device to the opening / closing machine when the architectural shutter is installed like the automatic closing device, and the installation work can be simplified correspondingly. In addition, a regular solenoid is used instead of a large and expensive keep solenoid, and a bifurcated lever is used for the brake release lever, and the base plate is axially placed in the brake space. By mounting the components of the automatic closing device other than the brake release lever appropriately on the surfaces on both sides of the base plate, the automatic closing device can be downsized and the switch can be downsized. In addition, the cost can be reduced and the application range can be expanded.

  In particular, in the invention according to claim 2, the pulling operation force of the manual return wire is transmitted to the slide plate via the transmission mechanism, so that the slide plate is smoothly and reliably moved from the second position to the first position on the base plate. Therefore, the operation reliability can be improved.

FIG. 1 is a longitudinal side view of the vicinity of a brake portion of a construction shutter opening and closing machine according to an embodiment of the present invention. FIG. 2 is an arrow view taken along line EE in FIG. FIG. 3 is an arrow view taken along line FF in FIG. 4 is a view corresponding to FIG. 1 showing a state in which the main part of the automatic closing device is removed from the state shown in FIG. FIG. 5 is an arrow view taken along line GG in FIG. FIG. 6 is a front view showing a main part of the automatic closing device. FIG. 7 is a view corresponding to FIG. 1 and showing a state of the automatic closing device during a brake releasing operation. FIG. 8 is an arrow view taken along the line HH of FIG. FIG. 9 is an arrow view taken along the line II of FIG. 10A and 10B show a brake release lever of the automatic closing device, FIG. 10A is a front view, and FIG. 10B is a left side view. 11A to 11C show a base plate of the automatic closing device, FIG. 11A is a front view of one surface side of the base plate, FIG. 11B is a plan view, and FIG. 11C is a bottom view. 12A to 12C also show the base plate, FIG. 12A is a front view of the other surface side of the base plate, FIG. 12B is a right side view, and FIG. 12C is a left side view with a part cut away. 13A to 13C show a slide plate of the automatic closing device, FIG. 13A is a front view with a part cut, FIG. 13B is a right side view with a part cut, and FIG. 13C is a plan view. 14A and 14B show a lock plate of the automatic closing device, FIG. 14A is a front view, and FIG. 14B is a left side view. 15A to 15C show the lock arm lever of the automatic closing device, FIG. 15A is a front view, FIG. 15B is a left side view, and FIG. 15C is a cross-sectional view taken along line JJ in 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.

  FIG. 1 shows a structure in the vicinity of a brake portion of an architectural shutter opening / closing device according to an embodiment of the present invention. Although not shown, the opening / closing machine 1 is attached to the inner surface of the side plate of the shutter box, and has an output shaft on the attachment surface side, and the speed reduction unit and the motor unit 2 in this order from the output shaft side in the axial direction. And the brake part 3 is connected. Although the switch 1 also has a control unit, this control unit is connected to the brake unit 3 or arranged separately from the switch 1.

  The case 4 of the brake unit 3 includes a cylindrical case body 4a and a partition wall that divides the space in the case body 4a into a first space 5 near the motor unit 2 and a second space 6 on the side opposite to the motor unit 2. Part 4b. A brake device 7 is accommodated in the first space 5, while an automatic closing device 8 is accommodated in the second space 6.

  The brake device 7 includes a brake shoe 11 that is integrally coupled to the motor shaft 10 of the motor unit 2, a brake shaft 12 that is slidable and rotatable by a predetermined distance in the axial direction, and a brake shaft 12. A brake drum 13 which is coupled to one end of the rotation integrally and faces the brake shoe 11 in the axial direction, and is arranged on the outer periphery of the brake shaft 12, and the brake drum 13 pressurizes the brake shoe 11 against the brake shaft 12 and the brake drum 13. The brake spring 14 is always urged so as to move in the contacting direction, and the electromagnetic clutch 15 is disposed on the opposite side of the brake drum 13 facing the brake shoe 11. When the electromagnetic clutch 15 is not energized, the brake device 7 is pressed against the brake shoe 11 by pressing the brake shaft 12 and the brake drum 13 toward the motor portion 2 by the urging force of the brake spring 14, so that the brake device 7 is Then, the braking force is generated to the motor shaft 10 of the motor unit 2 and the motor shaft 10 and thus the output shaft of the switch 1 are stopped. On the other hand, when the electromagnetic clutch 15 is energized, the brake shaft 12 and the brake drum 13 are moved away from the motor portion 2 against the urging force of the brake spring 14 by the magnetic force of the electromagnetic clutch 15, and the brake drum 13 and the brake shoe are moved. By releasing the pressure contact with 11, the brake device 7 is turned off (that is, the brake is released), and the motor shaft 10 can be rotated by energizing the motor unit 2.

  The brake shaft 12 passes through the partition wall 4b and the second space 6 of the case 4 of the brake unit 3 and passes through the center hole 17 of the cover plate 16 attached to the end surface of the case 4 of the brake unit 3. The case 4 is extended to the outside. The shutter curtain can be wound up by attaching an operation handle to the extending portion 12a of the brake shaft 12 and rotating the brake shaft 12 during a power failure or the like.

  2 and 3, the automatic closing device 8 includes a brake release lever 21, a base plate 22, a slide plate 23, a striking plate 24, a first spring 25, a lock pin 26, a lock plate 27, a lock arm. A lever 28, a second spring 29, a solenoid 30, a manual return wire 31, and a dead weight lowering wire 32 are provided.

  The brake release lever 21 is also shown in FIGS. 4 and 5, and as shown in enlarged detail in FIGS. 10A and 10B, the brake release lever 21 has a pair of leg portions 21 a and 21 a that extend so as to sandwich the brake shaft 12 on one end side. In this embodiment, the lever is formed using two plate members. Each leg portion 21a of the brake release lever 21 is provided with an engagement pin 34 as an engagement portion protruding inward from each other, and a hook bent with the attachment position of the engagement pin 34 as a bending point. A contact portion 35 is formed. On the other hand, on the surface of the partition part 4b of the brake part 3 on the side facing the second space 6, the leg parts 21a of the brake release lever 21 are provided on both sides of the boss part 4c through which the brake shaft 12 passes. A pair of insertion grooves 36 and 36 into which a part of the contact portion 35 can be inserted are provided. Then, a part of the contact portion 35 of each leg portion 21a corresponding to each insertion groove 36 is inserted, and the brake release lever 21 is placed above the brake shaft 12 in the second space 6 and on the side opposite to the leg portion 21a. The other end side is inclined upward, and the hook member 37 is mounted on the outer peripheral surface of the brake shaft 12 at a position where it engages with the engaging pin 34 of each leg portion 21a, so that the brake release lever 21 is supported. Further, as shown in FIG. 7, when a downward load is applied to the other end side of the brake release lever 21, the contact member 35 of each leg portion 21a is used as a fulcrum, and the hook pin 34 extends from the engagement pin 34 of each leg portion 21a. An acting force that presses the brake shaft 12 in the braking release direction against the urging force of the brake spring 14 acts on the brake shaft 12 via 37.

  The other end of the brake release lever 21 is connected to the upper end of its own weight lowering wire 32 via a connecting pin 38, while the lower end of the own weight lowering wire 32 is connected to the case body 4 a of the case 4 of the brake unit 3. It hangs down below the case 4 through the notch 39 formed, and an operation ring 40 is provided at the lower end thereof. When the operation ring 40 is pulled during a power failure or the like, a downward load is applied to the other end side of the brake release lever 21, so that the brake is released and the shutter curtain is lowered by its own weight.

  The base plate 22 is screwed onto a support column 41 (see FIG. 4) standing on the partition wall 4b of the case 4 of the brake unit 3 in a state perpendicular to the axial direction in the second space 6 of the brake unit 3. It is attached by stopping. Further, the base plate 22 does not interfere with the brake shaft 12 when viewed in the axial direction of the brake shaft 12, as shown in FIGS. 2 and 3, and also shown in FIGS. 6, 11A to C, and 12A to 12C. The first portion 22 a is located on one side of the brake shaft 12 and the second portion 22 b is located on the lower side of the brake shaft 12. A guide piece portion 42 is formed at the end portion near the center of the first portion 22a by bending the end portion to the outside in the axial direction (side facing the cover plate 16) at a right angle. A long guide hole 43 is provided in the vertical direction. An angle-shaped guide member 44 composed of a long side and a short side facing the guide piece portion 42 with a predetermined distance is attached to the first portion 22a, and the short side is fixedly attached. A guide hole 45 made of a long hole extending in the vertical direction is provided on the long side. 12B and 12C, the guide hole 45 has a positional relationship that coincides with the guide hole 43 of the guide piece portion 42 when viewed from the side surface direction of the base plate 22, but is shorter than the guide hole 43 of the guide piece portion 42. The guide piece portion 42 is configured to coincide with the lower half of the guide hole 43.

  The first portion 22a of the base plate 22 is provided with a guide hole 46 formed of a long hole in the vertical direction between the guide piece portion 42 and the guide member 44, and on the extension line of the guide hole 46. Similarly, a long hole 47 that is long in the vertical direction is provided at a lower position. A spring seat portion 48 formed by bending the upper end portion of the first portion 22a on the extension line of the guide hole 46 at a right angle to the outer side in the axial direction is formed at the lower end portion of the first portion 22a. A pedestal portion 49 is formed by bending the lower end portion in the axial direction (the side facing the partition wall portion 4b of the case 4) at a right angle. Further, two support pins 51 and 52 projecting inward in the axial direction are respectively attached to the first portion 22a, while three support pins 53, 54, projecting outward in the axial direction are respectively attached to the second portion 22b. 55 are attached side by side and at a predetermined interval.

  The slide plate 23 slides between the first position and the second position in the vertical direction along the guide hole 46 on the surface of the first portion 22a of the base plate 22 in the axial direction. As shown in detail in FIGS. 13A to 13C, a vertical surface portion 23a that slides on the outer surface in the axial direction of the first portion 22a, and one side end portion of the vertical surface portion 23a is bent at a right angle and is a guide piece. A first side wall portion 23b adjacent to the portion 42, a second side wall portion 23c formed by bending the other side surface portion of the vertical surface portion 23a at a right angle and close to the long side of the guide member 44, and a lower end portion of the vertical surface portion 23a. The contact piece 23d is bent at a right angle. The lock pin 26 is attached to the vertical center portion of the vertical surface portion 23a so as to protrude in the direction opposite to the bending direction of the first and second side wall portions 23b and 23c. A slide pin 56 protruding outward is attached to the upper end portion of the first side wall portion 23b, and the first and second side wall portions 23b and 23c have the same height as the mounting position of the lock pin 26, respectively. A pin insertion hole 57 penetrating in the direction orthogonal to the lock pin 26 is provided at the position. Furthermore, a screw hole 58 is provided at a position higher than the contact piece 23d of the vertical surface portion 23a by a predetermined dimension. When the slide plate 23 is attached, as shown in FIG. 6, the lock pin 26 is projected from the axially inner surface side of the base plate 22 through the guide hole 46 of the first portion 22a of the base plate 22, and the slide pin 56 is The slide pin 59 is inserted into the guide hole 43 of the guide piece portion 42 of the base plate 22, and the guide hole 45 of the guide member 44 of the base plate 22, the pin insertion hole 57 of the second side wall portion 23 c of the slide plate 23, and the slide plate 23. Are inserted into the pin insertion hole 57 of the first side wall portion 23 b and the guide hole 43 of the guide piece portion 42 of the base plate 22. As a result, the slide plate 23 is slidably provided between the upper first position (see FIG. 2) and the lower second position (see FIG. 8) on the axially outer surface of the base plate 22. ing.

  The striking plate 24 includes a mounting portion 24a attached to the first side wall portion 23b of the slide plate 23 via slide pins 56 and 59 across the guide piece portion 42 of the base plate 22, and a brake from the upper end of the mounting portion 24a. The load applying portion 24b is bent at a right angle toward the center of the shaft 12. The load applying portion 24b is located above the other end side (the end side opposite to the leg portion 21a) of the brake release lever 21 when the slide plate 23 is located at the first position, and the slide plate 23 is located at the first position. When moving from the second position to the second position, the brake release lever 21 is provided so as to contact the other end of the brake release lever 21 and apply a downward load.

  The first spring 25 includes a spring seat 48 of the base plate 22, a guide hole 45 of the guide member 44 of the base plate 22, a pin insertion hole 57 of the second side wall 23 c of the slide plate 23, and a first side wall of the slide plate 23. A compression coil spring mounted in a compressed state between the pin insertion hole 57 of the portion 23 b and the slide pin 59 in a state of being laid between the guide hole 43 of the guide piece portion 42 of the base plate 22. It is always biased so as to be positioned at the second position.

  Corresponding to the lock pin 26, the lock plate 27 is supported on the surface on the inner side in the axial direction of the base plate 22 so as to be swingable around the support pin 51 using the support pin 51 as a support shaft. As shown in detail in FIG. 14, the lock plate 27 is a fan-shaped flat plate provided with a through hole 61 through which the support pin 51 passes on the apex side. 26 is formed on the other end side of the arc portion of the lock plate 27, and a notch 63 is formed on the lock arm lever 28 to be engaged with a bearing 66 described later. As shown in FIG. 3, the lock plate 27 is engaged with the lock pin 26 by the hook portion 62 when the slide plate 23 is located at the first position, and the slide plate 23 is urged by the urging force of the first spring 25. The movement from the first position to the second position is restricted.

  The lock arm lever 28 is supported on the axially inner surface of the base plate 22 like the lock plate 27 so as to be swingable around the support pin 52 with the support pin 52 as a support shaft. As shown in an enlarged detail in FIG. 15, the lock arm lever 28 is a rectangular member composed of a first portion 28a and a second portion 28b having different thicknesses, and a support pin 52 is provided on the thick first portion 28a. Is provided with a bolt 65 penetrating through the thin second portion 28b with the tip of the threaded portion 65a projecting a predetermined dimension toward the base plate 22 side, A bearing 66 is attached to the tip of the threaded portion 65 a of the bolt 65. As shown in FIG. 3, when the lock plate 27 is engaged with the lock pin 26, the lock arm lever 28 is engaged with the notch 63 of the lock plate 27 so that the bearing 66 is engaged. 9 and a release position where the bearing 66 is disengaged from the notch 63 of the lock plate 27 to release the rocking restriction of the lock plate 27 as shown in FIG. It is provided so as to be movable (swingable).

  The second spring 29 is a tension coil spring. One end of the second spring 29 is fixed in the vicinity of the support pin 51 of the first portion 22a of the base plate 22 by a set screw 67, while the other end of the second spring 29 is connected to the bolt 65 of the lock arm lever 28. It is hung. Therefore, the second spring 29 is always urged so as to position the lock arm lever 28 at the restriction position.

  The solenoid 30 is a normal one in which the plunger 30b extending from the solenoid body 30a is attracted to the solenoid body 30a side when energized, and is mounted on the pedestal portion 49 of the base plate 22 with the plunger 30b facing upward. It has been. The distal end of the plunger 30 b is connected to the bolt 65 of the lock arm lever 28 via a connecting wire 68.

  The manual return wire 31 is for returning the slide plate 23 from the second position on the base plate 22 to the first position, and the automatic closing device 8 is provided with the manual return wire 31 as shown in FIG. A transmission mechanism 70 that transmits the pulling operation force to the slide plate 23 is further provided. The transmission mechanism 70 is provided on the same surface as the slide plate 23 of the base plate 22 (that is, on the outer surface in the axial direction) and is slidable in the vertical direction at a position below the contact piece 23d of the slide plate 23. A rack gear 71 and a pinion gear 72 rotatably supported on the base plate 22 with a support pin 54 as a support shaft so as to mesh with the rack gear 71 are provided. The rack gear 71 is provided with a guide hole 73 formed of a long hole in the vertical direction, which is the longitudinal direction (the direction in which the gear teeth are continuous), and the support pin 53 of the base plate 22 passes through the guide hole 73. . Further, a guide member 74 that abuts against the side end of the rack gear 71 opposite to the gear teeth is provided on the second portion 22 b of the base plate 22. Therefore, the rack gear 71 is guided to slide in the vertical direction by the guide function by the guide hole 73 and the support pin 53 and the guide function by the guide member 74.

  An upper end of a manual return wire 31 is connected to the pinion gear 72 via a fixing screw 75 screwed between adjacent tooth portions, and a lower end portion of the manual return wire 31 is the same as the self-weight drop wire 32. The brake part 3 is suspended below the case 4 through the notch 39 of the case 4, and an operation ring 76 is provided at the lower end thereof. When the operation ring 76 is pulled, the upper end of the rack gear 71 comes into contact with the contact piece 23d of the slide plate 23, lifts the slide plate 23 against the urging force of the first spring 25, and lifts the slide plate 23 to the second position. The position is returned to the first position. Here, when the slide plate 23 is positioned at the second position as shown in FIG. 8, the contact piece 23 d of the slide plate 23 and the upper end of the rack gear 71 are set to contact or approach each other. Further, a third spring 78 made of a tension coil spring is disposed between the fixing screw 75 and a set screw 77 fixed to the second portion 22b of the slide plate 23, with both ends thereof being latched. The third spring 78 is for returning the rack gear 71 and the pinion gear 72 of the transmission mechanism 70 to the original state (the state shown in FIG. 2) after the operation ring 76 is pulled.

  2, 3, 8, and 9, reference numeral 81 denotes a screw member fixed to the screw hole 58 (see FIG. 13) of the slide plate 23, and the screw portion of the screw member 81 is the base plate 22. It protrudes from the axially inner surface of the base plate 22 through the long hole 47. Reference numeral 82 denotes a microswitch mounted on the axially inner surface of the second portion 22b of the base plate 22. The microswitch 82 is the screw member 81 when the slide plate 23 is moved from the first position to the second position. The movement of the slide plate 23 is detected when the screw portion of the contact portion contacts the contact 82a. A signal from the micro switch 82 is input to the control unit of the switch via the cable 83.

  Next, the operation of the automatic closing device 8 will be described. Before the operation in which the solenoid 30 is not energized, the slide plate 23 is positioned at the first position on the base plate 22 as shown in FIGS. The load applying portion 24b of the striking plate 24 provided on the slide plate 23 is positioned above the other end side (the end portion opposite to the leg portion 21a) of the brake release lever 21. The lock plate 27 engages with the lock pin 26 to restrict the slide plate 23 from moving from the first position to the lower second position by the biasing force of the first spring 25. The lever 28 is positioned by a biasing force of the second spring 29 at a restricting position where the bearing 66 engages with the notch 63 of the lock plate 27 to restrict the rocking of the lock plate 27.

  When the solenoid 30 is energized from such a state, the plunger 30b of the solenoid 30 is attracted toward the solenoid body 30a as shown in FIGS. The bearing 66 moves from the restriction position to the release position where the restriction of the lock plate 27 is released. As a result, the lock plate 27 swings around the support pin 51 and the engagement between the lock plate 27 and the lock pin 26 is released, and the slide plate 23 is moved on the base plate 22 by the urging force of the first spring 25. Move from the first position to the second position. When the load applying portion 24b of the striking plate 24 abuts against the other end side of the brake release lever 21 and applies a downward load by the movement of the slide plate 23, the brake release lever 21 is contacted with the contact portion of each leg portion 21a. The brake shaft 12 is tilted about the fulcrum 35, and the brake shaft 12 is pressed against the brake shaft 12 from the engagement pin 34 of each leg portion 21a via the flange member 37 against the urging force of the brake spring 14 in the braking release direction. Since the acting force acts, braking of the brake device 7 is released.

  When the manual return wire 31 is pulled to return to the original state after the brake releasing operation, the slide plate 23 returns from the second position on the base plate 22 to the first position, and the lock plate 27 is connected to the lock pin 26. Engagement restricts the movement of the slide plate 23 from the first position. Further, the lock arm lever 28 returns to the restriction position by the urging force of the second spring 29 and is positioned at the restriction position.

  As described above, in the embodiment of the present invention, since the brake release operation and the return operation can be performed by the automatic closing device 8 housed in the second space 6 of the brake unit 3, the conventional external automatic It is not necessary to perform an operation such as attaching the automatic closing device to the opening / closing machine when the architectural shutter is installed like the closing device, and the installation operation can be simplified correspondingly.

  In addition, when the automatic closing device 8 is housed in the second space 6 of the brake unit 3, a small and inexpensive ordinary solenoid 30 is used instead of using a large and expensive keep solenoid as in Patent Document 2. At the same time, the brake release lever 21 is made of a bifurcated lever to reduce its size, and the base plate 22 is mounted in the second space 6 of the brake portion 3 in a state perpendicular to the axial direction. Each component of the automatic closing device 8 other than the brake release lever 21 was appropriately arranged on the surfaces on both sides of the 22. Accordingly, the automatic closing device 8 can be reduced in size, and the storage performance of the automatic closing device 8 in the second space 6 of the brake portion 3 can be improved. It can contribute to the conversion. Further, the cost can be reduced, and the present invention can be applied to the opening / closing device 1 in which the brake shaft 12 penetrates the brake portion 3 as in the present embodiment, and the application range can be expanded.

  In particular, in this embodiment, the pulling operation force of the manual return wire 31 is transmitted to the slide plate 23 via the transmission mechanism 70, so that the slide plate 23 returns from the second position on the base plate 22 to the first position. . Specifically, when the manual return wire 31 is pulled, the pinion gear 72 of the transmission mechanism 70 rotates, and the rack gear 71 that meshes with the pinion gear 72 slides upward on the same surface as the slide plate 23 of the base plate 22. The upper end of 71 comes into contact with the contact piece 23d of the slide plate 23 to lift the slide plate 23 against the urging force of the first spring 25, and the slide plate 23 is smoothly moved from the second position to the first position. It can be reliably restored. As a result, the operation reliability can be improved.

  In addition, this invention is not limited to the said embodiment, A various other form is included. For example, in the above-described embodiment, the lock arm lever 28 provided so as to be capable of swinging around the support pin 52 is used as the swing restricting member for restricting the swing of the lock plate 27. However, the present invention is not limited to this, and the swing restricting member may be configured to be slidable between the vertically restricting position and the releasing position on the surface of the base plate.

  In the above embodiment, when the manual return wire 31 for returning the slide plate 23 from the second position on the base plate 22 to the first position is provided, the pulling operation force of the manual return wire 31 is transmitted to the slide plate 23. The transmission mechanism 70 is further provided. However, in the present invention, instead of using the transmission mechanism 70, a support member for changing the wiring direction of the manual return wire 31 is used as the case 4 of the brake unit 3 (case body 4a). When the manual return wire 31 is pulled, a lifting force is applied to the slide plate 23, and the slide plate 23 may be returned from the second position to the first position.

DESCRIPTION OF SYMBOLS 1 Opening and closing machine 2 Motor part 3 Brake part 6 2nd space 8 Automatic closing device 12 Brake shaft 14 Brake spring 21 Brake release lever 21a Leg part 22 Base plate 23 Slide plate 23d Contacting piece part 24 Impact plate 24b Load provision part 25 1st Spring 26 Lock pin 27 Lock plate 28 Lock arm lever (swing restricting member)
29 Second spring 30 Solenoid 30b Plunger 31 Manual return wire 34 Engagement pin (engagement part)
35 Contact part 37 Gutter member 46 Guide hole (long hole)
51, 54 Support pin (support shaft)
70 Transmission mechanism 71 Rack gear 72 Pinion gear

Claims (2)

A speed reduction part, a motor part and a brake part are connected in order from the output shaft side in the axial direction. The brake part is provided with a brake shaft that can move a predetermined distance in the axial direction, and a braking force is generated by the brake shaft. In an architectural shutter opening and closing machine having a brake spring that is constantly energized so as to move in the direction of
A bifurcated lever having a pair of leg portions extending so as to sandwich the brake shaft on one end side, and projecting inwardly from each leg portion of the lever and attached to the outer peripheral surface of the brake shaft An engagement portion that engages with a member and a contact portion that contacts the case of the brake portion are formed, and when the downward load is applied to the other end side of the lever, the contact portion serves as a fulcrum and the engagement A brake release lever provided so that an acting force is exerted on the brake shaft against the urging force of the brake spring against the brake shaft via the flange member from the portion to act on the brake release direction;
A base plate attached in a vertical state perpendicular to the axial direction in the space of the brake part;
A slide plate provided on one surface of the base plate so as to be slidable between a first position and a second position in the vertical direction;
Provided on the striking plate attached to the slide plate, when the slide plate is located at the first position, located above the other end of the brake release lever, and when the slide plate moves from the first position to the second position A load application portion for applying a downward load in contact with the other end of the brake release lever;
A first spring that constantly biases the slide plate to be positioned in the second position;
A lock pin attached to the slide plate and protruding from the other surface side of the base plate through a long hole in the vertical direction provided in the base plate;
The other surface side of the base plate is supported so as to be swingable around a support shaft, and when the slide plate is located at the first position, the slide plate is engaged with the lock pin by the biasing force of the first spring. A lock plate for restricting movement from the first position to the second position;
A swing regulating member provided on the other surface side of the base plate so as to be movable between a regulating position for regulating the rocking of the lock plate and a release position for releasing the regulation;
A second spring that constantly urges the swing restricting member to be positioned at the restricting position;
A solenoid attached to the other surface side of the base plate and having a plunger tip connected to the swing restricting member;
A shutter opening / closing machine for building, comprising a manual return wire for returning the slide plate from the second position to the first position.   It further includes a transmission mechanism for transmitting the pulling operation force of the manual return wire to the slide plate, and this transmission mechanism is provided on the same surface as the slide plate of the base plate and slidable in the vertical direction at a position below the slide plate. And a pinion gear rotatably supported by a base plate via a support shaft so as to mesh with the rack gear, and an upper end of the manual return wire is connected to the pinion gear. When the lower end of the rack is pulled, the upper end of the rack gear comes into contact with the lower end of the slide plate, lifts the slide plate against the biasing force of the first spring, and returns the slide plate from the second position to the first position. The architectural shutter opening and closing machine according to claim 1.

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